Effects of kinesio taping on the biomechanical characteristics of the lower limbs during side-step cutting / 中国组织工程研究

BACKGROUND:Kinesio taping has been widely used as a means of sports protection,but its role as a means to correct abnormal biomechanical changes of the lower limbs during side-step cutting remains unclear. OBJECTIVE:To analyze and compare the changes in lower limb kinematics and dynamics when the subjects complete the side-step cutting of the knee joint under the conditions of kinesio taping,placebo taping and blank control. METHODS:Thirty-nine male college students majoring in basketball were recruited as subjects.Each subject was tested with kinesio taping,placebo taping or no taping.The mechanical correction method was used to patch the dominant knee joint of each subject.The run-up speed of 4.5-5.5 m/s was selected to complete the 45° side-step cutting motion,and the kinematics and kinetics data were collected synchronously by the three-dimensional dynamic capture system and the force measuring platform.The kinematics and kinetics parameters at the moment of initial touchdown and peak ground reaction force were selected for data analysis.SPSS 27.0 software was used for statistical analysis of the test data. RESULTS AND CONCLUSION:Kinematic indexes:compared with no taping and placebo taping,the hip abduction and knee valgus angles at the initial touchdown moment were significantly decreased when kinesio taping was used(P<0.05);at the moment of peak lateral ground reaction force,the angles of hip abduction,knee valgus and ankle plantar flexion decreased significantly(P<0.05),and the knee flexion angle was significantly increased(P<0.05).Kinetic indexes:Compared with no taping,both kinesio taping and placebo taping significantly reduced hip abduction and external rotation torque,knee valgus and external rotation torque at the moment of initial touchdown(P<0.05),and significantly reduced peak vertical ground reaction force and peak horizontal backward ground reaction force(P<0.05);in addition,kinesio taping significantly reduced peak lateral ground reaction force compared with no taping and placebo taping(P<0.05).These results indicate that kinesio taping of the knee joint may improve some kinematic and kinetic indexes associated with lower limb injury risk factors during the completion of the side-step cutting in basketball specialized college students to some extent,and may have a positive effect on the prevention of injury during the side-step cutting.In addition,the trends in the effects of placebo taping and kinesio taping on the knee joint are more consistent in terms of changes in some indexes,suggesting that there may be a placebo effect on the mechanism of action of kinesio taping.

Effects of 1 470 nm Semiconductor Laser on Vaporization Ablation, Cutting, and Coagulation in Ex Vivo Animal Tissue / 实验动物与比较医学

Objective To observe the effects of a 1 470 nm semiconductor laser on vaporization cutting, coagulation, and thermal injury of ex vivo animal tissues, aiming to explore the feasibility of its application in the treatment of benign prostatic hyperplasia.Methods The experimental group and control group were treated with HANS-D1 and ML-DD01FI 1 470 nm semiconductor laser therapy equipment, respectively. Fresh ex vivo pig bladder tissue was exposed to lasers with the optical fiber placed at distances of 0.5 cm and 1 cm from the tissue for 5 s. The effects of layers at powers of 60, 90, 120, 150, and 160 W on tissue injury were observed. Ex vivo dog prostate and pig kidney tissues were used for vaporization ablation and cutting to observe the effects of lasers at the same power levels on tissue vaporization and cutting thermal injury. Additionally, in coagulation mode, the effects of 30, 40, and 50 W semiconductor lasers on tissue coagulation were observed after irradiating ex vivo pig kidney tissue for 5, 10, and 15 seconds. Results When the optical fiber was placed 1 cm away from the tissue, the 1 470 nm semiconductor lasers did not cause accidental damage to adjacent normal bladder tissue. However, at a distance of 0.5 cm, the 120 W, 150 W, or 160 W lasers caused slight damage to the bladder tissue. In addition, with the increase in output power, the vaporization ablation efficiency of 60-160 W lasers on dog prostate tissue gradually increased, showing a good linear correlation between vaporization volume and total energy consumption (P<0.001). Histopathological HE staining results indicated that the coagulation layer thickness in the experimental group was 292.20-309.98 µm, and the vaporization layer depth was 1.49-4.52 mm. In the control group, the coagulation layer thickness was 289.91-303.53 µm, and the vaporization layer depth was 1.88-4.43 mm. There was no significant difference between the two groups (P>0.05). Moreover, when performing vaporization cutting on ex vivo pig kidney tissue with a cross-sectional area of 1 cm2, the efficiency of vaporization cutting by the 60-160 W 1 470 nm semiconductor lasers increased with the increase in output power (P<0.05). The coagulated layer thickness in the experimental group was 496.04-514.47 µm, while that in the control group was 489.39-518.53 µm. Additionally, in coagulation mode, when ex vivo pig kidney tissue was irradiated for 5, 10, and 15 s with 30, 40, and 50 W semiconductor lasers, the coagulation diameter, groove depth, and coagulation efficiency gradually increased with the increase in laser output power (P<0.05). The coagulation layer thickness in the experimental group and control group was 399.10-449.98 µm and 392.97-447.65 µm, respectively, and the vaporization layer depth was 3.05-7.09 mm and 2.70-7.14 mm, respectively. There was no significant difference between the two groups (P>0.05).Conclusion The 1 470 nm semiconductor laser shows good vaporization ablation, cutting, and coagulation effect on ex vivo tissues, with a good linear correlation between the effect and the output energy.

Analysis on Determination and Quantity Transfer of Standard Decoction of Ginseng Radix et Rhizoma by Fresh and Traditional Cutting / 中国实验方剂学杂志

ObjectiveTo analyze the quantity-quality transfer of standard decoction of Ginseng Radix et Rhizoma（GRR） decoction pieces produced by fresh and traditional cutting， and to provide reference for quality control and application development of the decoction pieces produced by fresh cutting. MethodTen batches of representative GRR decoction pieces produced by fresh and traditional cutting and their standard decoctions were prepared by standard process， and high performance liquid chromatography（HPLC） fingerprint of the standard decoction was established and performed on an Agilent EC-C18 column（4.6 mm×150 mm， 2.7 μm） with acetonitrile（A）-0.1% phosphoric acid aqueous solution（B） as the mobile phase for gradient elution（0-23 min， 18%-21%A； 23-35 min， 21%-28%A； 35-80 min， 28%-32%A）， and the detection wavelength was 203 nm. Then similarity evaluation， principal component analysis（PCA） and partial least squares-discriminant analysis（PLS-DA） of fingerprint of the standard decoction were performed to screen the differential components with variable importance in the projection（VIP） value>1. Quantitative analysis was carried out on the screened known differential components， and combined with the indicators of the dry extract rate and the transfer rate， to explore the differences in the quantity-quality transfer between the standard decoction of GRR decoction pieces produced by fresh and traditional cutting. ResultThe fingerprint similarity of the standard decoction of GRR decoction pieces produced by fresh and traditional cutting was more than 0.950， and 18 common peaks were identified， including 9 identified common peaks. The results of PCA and PLS-DA showed that there were some differences in the contents of index components between the two standard decoctions. The contents of ginsenoside Rg1， Re and Ro in GRR decoction pieces produced by fresh cutting were higher than those in traditional decoction pieces， while the contents of ginsenoside Rb1， Rc ， Rb2 and Rd were lower than those in traditional decoction pieces. The contents of ginsenoside Rg1， Re， Rb1 and Ro in the standard decoction of GRR decoction pieces produced by fresh cutting were higher than those in the standard decoction of traditional decoction pieces， while the contents of ginsenoside Rc ， Rb2 and Rd were comparable between the two standard decoctions. Compared with the standard decoction of the traditional decoction pieces， the average transfer rates of ginsenoside Rg1， Rb1， Rc， Rb2 and dry extract rate of the standard decoction of GRR decoction pieces produced by fresh cutting were significantly increased（P<0.05）， and the average transfer rate of ginsenoside Re and Rd also increased， but the difference was not statistically significant. ConclusionThe dry extract rate， content and transfer rate of index components of standard decoction of GRR decoction pieces produced by fresh cutting are better than those of the standard decoction of traditional decoction pieces， which can provides data support for the subsequent clinical application of fresh cutting products.

Analysis on Determination and Quantity Transfer of Standard Decoction of Ginseng Radix et Rhizoma by Fresh and Traditional Cutting / 中国实验方剂学杂志

ObjectiveTo analyze the quantity-quality transfer of standard decoction of Ginseng Radix et Rhizoma（GRR） decoction pieces produced by fresh and traditional cutting， and to provide reference for quality control and application development of the decoction pieces produced by fresh cutting. MethodTen batches of representative GRR decoction pieces produced by fresh and traditional cutting and their standard decoctions were prepared by standard process， and high performance liquid chromatography（HPLC） fingerprint of the standard decoction was established and performed on an Agilent EC-C18 column（4.6 mm×150 mm， 2.7 μm） with acetonitrile（A）-0.1% phosphoric acid aqueous solution（B） as the mobile phase for gradient elution（0-23 min， 18%-21%A； 23-35 min， 21%-28%A； 35-80 min， 28%-32%A）， and the detection wavelength was 203 nm. Then similarity evaluation， principal component analysis（PCA） and partial least squares-discriminant analysis（PLS-DA） of fingerprint of the standard decoction were performed to screen the differential components with variable importance in the projection（VIP） value>1. Quantitative analysis was carried out on the screened known differential components， and combined with the indicators of the dry extract rate and the transfer rate， to explore the differences in the quantity-quality transfer between the standard decoction of GRR decoction pieces produced by fresh and traditional cutting. ResultThe fingerprint similarity of the standard decoction of GRR decoction pieces produced by fresh and traditional cutting was more than 0.950， and 18 common peaks were identified， including 9 identified common peaks. The results of PCA and PLS-DA showed that there were some differences in the contents of index components between the two standard decoctions. The contents of ginsenoside Rg1， Re and Ro in GRR decoction pieces produced by fresh cutting were higher than those in traditional decoction pieces， while the contents of ginsenoside Rb1， Rc ， Rb2 and Rd were lower than those in traditional decoction pieces. The contents of ginsenoside Rg1， Re， Rb1 and Ro in the standard decoction of GRR decoction pieces produced by fresh cutting were higher than those in the standard decoction of traditional decoction pieces， while the contents of ginsenoside Rc ， Rb2 and Rd were comparable between the two standard decoctions. Compared with the standard decoction of the traditional decoction pieces， the average transfer rates of ginsenoside Rg1， Rb1， Rc， Rb2 and dry extract rate of the standard decoction of GRR decoction pieces produced by fresh cutting were significantly increased（P<0.05）， and the average transfer rate of ginsenoside Re and Rd also increased， but the difference was not statistically significant. ConclusionThe dry extract rate， content and transfer rate of index components of standard decoction of GRR decoction pieces produced by fresh cutting are better than those of the standard decoction of traditional decoction pieces， which can provides data support for the subsequent clinical application of fresh cutting products.

Comparative effectiveness research of different testing methods in functional quality inspection of precision surgical instruments / 中国医学装备

Objective:To compare the testing effects of different testing methods in the functional inspection of precision surgical scissors and needle holders.Methods:By consulting relevant literature and professional books,three testing methods and materials for precision surgical scissors and needle holders were selected.The cutting performance of the precision surgical scissors were tested by gauze cloth,cotton wool,and silicone film method in the Interlock surgical instrument testing set.The clamping performance of precision needle holder was tested by using light,needle clips,and thread clamping method in the Interlock surgical instrument testing set.100 pieces of precision surgical scissors and needle holders which were qualified for cleaning and disinfection in the hospital were selected for effectiveness testing,and a self-made satisfaction questionnaire to investigate the satisfaction of surgeons with the use of instruments.Results:After 100 precision surgical scissors tested using three methods of gauze,cotton wool,and silicone film,the qualified number of cutting performance was 94,76,and 58,respectively,the difference was statistically significant(x2=36.526,P<0.05).The satisfaction rate of surgeons with the use of precision surgical scissors passed the silicone film test was the highest at 100%,followed by cotton wool cloth at 82.0%,and the gauze method at the worst at 67.0%,the difference was statistically significant(x2=48.439,P<0.05).After 100 precision needle holders were tested by using three methods of light irradiation,needle clamping,and wire clamping,the qualified number of clamping performance was 96,78,and 62,respectively,the difference was statistically significant(x2=38.160,P<0.05).The satisfaction rate of surgeons with the precision needle holders passed the clamp line test was the highest at 100.0%,followed by the clamp needle at 79.0%,and the worst under light at 62.0%,the difference was statistically significant(x2=57.705,P<0.05).Conclusion:The function and quality of precision surgical scissors and needle holders tested by the test objects in Interlock Surgical Instrument Test Suite can objectively and accurately reflect the functional status of surgical scissors and needle holders,provide reference for regular maintenance and upkeep of instruments,and ensure safe use of instruments.

Herramientas de corte para optimizar parámetros de clasificación de especies maderables con redes neuronales convolucionales / Cutting tools to optimize classification parameters of timber species with convolutional neural networks

Introducción: La gran diversidad de especies maderables tropicales demanda el desarrollo de nuevas tecnologías de identificación con base en sus patrones o características anatómicas. La aplicación de redes neuronales convolucionales (CNN) para el reconocimiento de especies maderables tropicales se ha incrementado en los últimos años por sus resultados prometedores. Objetivo: Evaluamos la calidad de las imágenes macroscópicas con tres herramientas de corte para mejorar la visualización y distinción de las características anatómicas en el entrenamiento del modelo CNN. Métodos: Recolectamos las muestras entre el 2020 y 2021 en áreas de explotación forestal y aserraderos de Selva Central, Perú. Luego, las dimensionamos y, previo a la identificación botánica y anatómica, las cortamos en secciones transversales. Generamos una base de datos de imágenes macroscópicas de la sección transversal de la madera, a través del corte, con tres herramientas para ver su rendimiento en el laboratorio, campo y puesto de control. Resultados: Usamos tres herramientas de corte para obtener una alta calidad de imágenes transversales de la madera; obtuvimos 3 750 imágenes macroscópicas con un microscopio portátil que corresponden a 25 especies maderables. El cuchillo ''Tramontina'' es duradero, pero pierde el filo con facilidad y se necesita una herramienta para afilar, el cúter retráctil ''Pretul'' es adecuado para madera suave y dura en muestras pequeñas de laboratorio; el cuchillo ''Ubermann'' es apropiado para el campo, laboratorio y puesto de control, porque tiene una envoltura duradera y láminas intercambiables en caso de pérdida de filo. Conclusiones: La calidad de las imágenes es decisiva en la clasificación de especies maderables, porque permite una mejor visualización y distinción de las características anatómicas en el entrenamiento con los modelos de red neuronal convolucional EfficientNet B0 y Custom Vision, lo cual se evidenció en las métricas de precisión.

Introduction: The great diversity of tropical timber species demands the development of new technologies capable of identifying them based on their patterns or anatomical characteristics. The application of convolutional neural networks (CNN) for the recognition of tropical timber species has increased in recent years due to the promising results of CNNs. Objective: To evaluate the quality of macroscopic images with three cutting tools to improve the visualization and distinction of anatomical features in the CNN model training. Methods: Samples were collected from 2020 to 2021 in areas of logging and sawmills in the Central Jungle, Peru. They were later sized and, after botanical and anatomical identification, cut in cross sections. A database of macroscopic images of the cross-section of wood was generated through cutting with three different tools and observing its performance in the laboratory, field, and checkpoint. Results: Using three cutting tools, we obtained high quality images of the cross section of wood; 3 750 macroscopic images were obtained with a portable microscope and correspond to 25 timber species. We found the ''Tramontina'' knife to be durable, however, it loses its edge easily and requires a sharpening tool, the ''Pretul'' retractable cutter is suitable for cutting soft and hard wood in small laboratory samples and finally the ''Ubermann'' knife is suitable for use in the field, laboratory, and checkpoint, because it has a durable sheath and interchangeable blades in case of dullness. Conclusion: The quality of the images is decisive in the classification of timber species, because it allows a better visualization and distinction of the anatomical characteristics in training with the EfficientNet B0 and Custom Vision convolutional neural network models, which was evidenced in the precision metrics.

The Response of Local White Guinea Yam Cultivars to the Vine Cutting Propagation Technique Using Locally Available Rooting Substrates

Good quality planting materials for yam cultivation is a major challenge and adapting the most preferred local varieties to high ratio propagation methods such as the vine cutting could help ameliorate this constraint. An experiment was conducted in the screen house at CSIR-Savanna Agricultural Research Institute to assess the response of ‘Labako’, ‘Nyamenti’ and ‘Kpamyo’ (check) to vine cutting under different substrates. The experiment was 3 x 6 factorial arranged in a completely randomized design with 3 replications. Single node cuttings were obtained from 3 months old plants and established in the various rooting substrates (carbonized rice husk; fermented rice bran; aged rice husk; top-soil ,cocopeat and carbonized rice husk + top-soil; 2:1).Highly significant differences (P<0.001) existed in main effects and interaction of the factors. All cultivars attained 100% survival in CRH (carbonized rice husk) and cocopeat. Kpamyo and Nyamenti had 89.6% regeneration in cocopeat, FRB (fermented rice bran) and CRH. Labako exhibited the maximum shoot growth (31 cm) in CRH whiles the minimum (10 cm) was observed in ARH (aged rice husk) for Kpamyo. Six nodes were produced by Nyamenti in CRH, whiles Kpamyo produced 3 nodes in the same substrate. Labako initiated 88% tuberization, higher than Kpamyo with 75%. Generally, the cultivars were successfully adapted to the vine cutting technique in CRH, FRB as well as cocopeat. CRH and FRB are locally available, hence less expensive to acquire and therefore recommended for cost-effective single node propagation of the popular local yam cultivars.

Biosseguridade na avicultura de corte: impactos na produção e alternativas para prevenção de doenças / Biosecurity in beef poultry: impacts on production and alternatives for disease prevention / Bioseguridad en avicultura: impactos en la producción y alternativas para la prevención de enfermedades

A avicultura de corte levou ao Brasil a ser o no líder exportador de carne de frango, desde 2011, e o terceiro produtor global desta proteína. Portanto, é importante que todo produtor possua e mantenha um programa de biosseguridade continuado, respeitando rigorosamente cada etapa ou prática de manejo a fim de obter o sucesso econômico de sua produção. Sustentado pela medicina veterinária preventiva, um programa de biosseguridade deve apresentar aspectos direcionados a cada sistema de proteção em particular, para prevenir e controlar a presença e/ou introdução de microrganismos patogênicos nos rebanhos. O objetivo deste trabalho e apresentar uma revisão atualizada de literatura sobre programas de biosseguridade para evitar a proliferação de agentes patogênicos na avicultura de corte como os dois tipos de Salmonella que causam riscos à saúde pública e à dos animais. A pesquisa é qualitativa de cunho exploratório bibliográfico-documental, com pesquisa em sites como o Google Acadêmico, da revista de veterinária da Unipar, SCIELO, portal CAPES e sites governamentais. O resultado da pesquisa apresentou um panorama real sobre emprego de programas de biosseguridade no Brasil, direcionados à avicultura de corte, demonstrando que os produtores estão se conscientizando sobre a importância destes programas, devido à pressão do mercado exportador global. Conclui-se que ainda falta uma maior conscientização por parte de todos os produtores brasileiros, para evitar que o plantel produzido seja contaminado por agentes patogênicos, principalmente a Salmonella, evitando que a saúde pública e animal esteja comprometida. Somente desta maneira, o Brasil conseguirá manter e expandir mais o mercado avícola a nível global.(AU)

Poultry farming has led Brazil to be the leading exporter of chicken meat, since 2011, and the third global producer of this protein. Therefore, it is important that every producer has and maintains a continuous biosecurity program, strictly respecting each stage or management practice in order to obtain the economic success of their production. Supported by preventive veterinary medicine, a biosecurity program must present aspects directed to each protection system in particular, to prevent and control the presence and/or introduction of pathogenic microorganisms in herds. The objective of this work is to present an updated review of the literature on biosecurity programs to prevent the proliferation of pathogenic agents in poultry farming, such as the two types of Salmonella that pose risks to public and animal health. The research is qualitative, bibliographical-documentary exploratory, with research on sites such as Google Scholar, Unipar's veterinary magazine, SCIELO, CAPES portal and government sites. The result of the research presented a real panorama on the use of biosecurity programs in Brazil, directed to poultry production, demonstrating that producers are becoming aware of the importance of these programs, due to the pressure of the global export market. It is concluded that there is still a lack of greater awareness on the part of all Brazilian producers, to prevent the produced herd from being contaminated by pathogenic agents, mainly Salmonella, preventing public and animal health from being compromised. Only in this way will Brazil be able to maintain and further expand the poultry market at a global level.(AU)

La avicultura llevó a Brasil a ser el principal exportador de carne de pollo, desde 2011, y el tercer productor mundial de esta proteína. Por ello, es importante que todo productor cuente y mantenga un programa de bioseguridad continuo, respetando estrictamente cada etapa o práctica de manejo para obtener el éxito económico de su producción. Apoyado en la medicina veterinaria preventiva, un programa de bioseguridad debe presentar aspectos dirigidos a cada sistema de protección en particular, para prevenir y controlar la presencia y/o introducción de microorganismos patógenos en los rebaños. El objetivo de este trabajo es presentar una revisión actualizada de la literatura sobre programas de bioseguridad para prevenir la proliferación de agentes patógenos en la avicultura, como los dos tipos de Salmonella que presentan riesgos para la salud pública y animal. La investigación es cualitativa, bibliográfico-documental exploratoria, con pesquisa en sitios como Google Scholar, revista veterinaria de la Unipar, SCIELO, portal de la CAPES y sitios gubernamentales. El resultado de la investigación presentó un panorama real sobre el uso de programas de bioseguridad en Brasil, dirigidos a la producción avícola, demostrando que los productores están tomando conciencia de la importancia de estos programas, debido a la presión del mercado mundial de exportación. Se concluye que aún falta una mayor conciencia por parte de todos los productores brasileños, para evitar que el hato producido sea contaminado por agentes patógenos, principalmente Salmonella, evitando que se comprometa la salud pública y animal. Solo así Brasil podrá mantener y expandir aún más el mercado avícola a nivel mundial.(AU)

Pretreatment Effects of Cutting Balloon on Coronary Artery Calcification Based on Finite Element Analysis / 医用生物力学

Objective To investigates the applicability of cutting balloon in the pretreatment of superficial coronary artery calcified lesions, so as to decrease the occurrence of serious consequences in the treatment of calcified lesions. Methods The effect of cutting balloon on calcified plaques with different curvatures, thickness, and length was analyzed using the finite element method, with normal balloon as a control. The thickness of calcified plaque was set to 0.3 mm and 0.4 mm, and the length was set to 2 mm and 4 mm. The calcification degree was set to 120°, 180°, 270°and 360° according to the intravenous ultrasound (IVUS) calcification severity grading, with a total of 16 types of calcified plaques. The brittle fracture module was used to simulate calcification fracture of calcified plaques, and virtual stent implantation was carried out based on pretreatment simulation. The effect of pretreatment was evaluated by calcification fracture condition and stent roundness. Results For superficial calcification lesions, in lesions less than 120°, the balloon could not remove the calcification plaque obstruction, and the stent roundness rate was 82.75%. In 180° calcified lesions with thickness of less than 0.3 mm, the calcification was broken by cutting balloon under 1 215.9 kPa expansion pressure, and the post-stent roundness rate was 74.42%; normal balloon could not cause calcification fracture under safe expansion pressure (1 418.55 kPa). In 270°calcified lesions with thickness less than 0.3 mm, the normal balloon produced 3 fractures under 1 013.25 kPa expansion pressure. The cutting balloon produced 2 fractures under 1 013.25 kPa expansion pressure, and the balloon could not fracture the circular calcified lesions with thickness of 0.3 mm. Conclusions Cutting balloon is recommended for 180°calcified lesions with thickness less than 0.3 mm, the normal balloon is recommended for 270°calcified lesions, and balloon pretreatment is not recommended for annular lesions with thickness greater than 0.3 mm.

DNA barcoding in herbal medicine:Retrospective and prospective / 药物分析学报

DNA barcoding has been widely used for herb identification in recent decades,enabling safety and innovation in the field of herbal medicine.In this article,we summarize recent progress in DNA bar-coding for herbal medicine to provide ideas for the further development and application of this tech-nology.Most importantly,the standard DNA barcode has been extended in two ways.First,while conventional DNA barcodes have been widely promoted for their versatility in the identification of fresh or well-preserved samples,super-barcodes based on plastid genomes have rapidly developed and have shown advantages in species identification at low taxonomic levels.Second,mini-barcodes are attractive because they perform better in cases of degraded DNA from herbal materials.In addition,some mo-lecular techniques,such as high-throughput sequencing and isothermal amplification,are combined with DNA barcodes for species identification,which has expanded the applications of herb identification based on DNA barcoding and brought about the post-DNA-barcoding era.Furthermore,standard and high-species coverage DNA barcode reference libraries have been constructed to provide reference se-quences for species identification,which increases the accuracy and credibility of species discrimination based on DNA barcodes.In summary,DNA barcoding should play a key role in the quality control of traditional herbal medicine and in the international herb trade.

Effect of Pin Holes Location of Unicompartmental Knee Arthroplasty on Postoperative Tibial Plateau Mechanical Properties / 中国医疗器械杂志

OBJECTIVE@#The purpose of this study is to explore the biomechanical characteristics of the tibia after unicompartmental knee arthroplasty with different distributions of two-pin holes, and to optimize the two-pin holes scheme to reduce the risk of tibial fractures after unicompartmental knee arthroplasty.@*METHODS@#Lower limbs model is segmented and reconstructed from computed tomography images. Four combinations of two pin holes created for tibial cutting guide placement are simulated with finite element analysis.@*RESULTS@#In the third mode, the positioning hole at the proximal medial edge of the tibial plateau has the highest stress value, and the position of the positioning hole near the medial edge of the proximal tibial plateau appears stress concentration.@*CONCLUSIONS@#The present study revealed that placing tibial cutting guide holding pins centrally would lower the risks of periprosthetic fracture of the medial tibial plateau.

A study of the safety and efficacy of intravascular lithotripsy in the treatment of coronary artery calcification lesions / 中国介入心脏病学杂志

Objective To evaluate the safety and efficacy of intravascular lithotripsy(IVL)in the treatment of coronary artery calcification lesions.Methods A total of 53 patients who underwent endovascular imaging guided treatment of coronary artery calcified lesions with either IVL or cutting balloon(CB)at the Affiliated Hospital of Jining Medical College from January 2023 to July 2023 were retrospectively analysed(IVL:n=18,CB:n=35)were retrospectively analysed to compare the technique,clinical success rate,major adverse cardiovascular events(MACE)and readmission for cardiovascular events in patients followed during hospitalisation and 1 month after the procedure.Results Clinical success rates were identical in the IVL and CB groups(100.0％vs.100.0％,P＞0.999),the minimum lumen area of lesions was similar in the VL and CB groups[(1.7±0.4)mm2 vs.(1.7±0.5 mm2),P=0.628].And there was a statistically significant difference in the overall mean lesion length between the IVL and CB groups[(28.4±9.6)mm vs.(20.9±8.6)mm,P=0.008].During the procedure,there were no complications such as aneurysm,thrombus,or emergency vessel closure.There was a statistically significant difference in the overall mean value of residual stenosis between the IVL and CB groups[(1.7±1.7)％vs.(6.9±2.0)％,P=0.049].There were no MACE in either group during hospitalisation or at the one-month follow-up(0 vs.0,P＞0.999),and 3 patients in the CB group were readmitted for angina pectoris(0 vs.8.6％,P=0.543),with no significant difference in readmission rates between the two groups.Conclusions The technique of intravascular lithotripsy is safe and effective in the treatment of coronary artery calcification lesions.

Nest refuse of Acromyrmex balzani (Hymenoptera: Formicidae) increases the plant vigor in Turnera subulata (Turneraceae) / O substrato de descarte de Acromyrmex balzani (Hymenoptera: Formicidae) aumenta o vigor da planta Turnera subulata (Turneraceae)

Some studies report the positive effect of organic residues from ant nests on soil properties and on the structure of the adjacent plant community in field experiments, but there is a gap about the effect on individual species. The purpose of the present study was to compare the soil nutrient content and the development of Turnera subulata Smith, an ornamental species, in the presence of the nest refuse (basically composed of fragments of grass leaves and the symbiotic fungus) produced by the leaf-cutting ant Acromyrmex balzani (Emery, 1890) or in control soil through a greenhouse pot experiment. The experiment was carried out with two treatments: control soil and soil with 25% of nest refuse. The plants were kept in 1L pots for 90 days. We evaluated the parameters: plant height, stem diameter, root length, number of leaves, dry weight of the root, dry and fresh aboveground biomass. Additionally, the relative chlorophyll content and leaf nutrients were used as nutritional parameters. As a result, plants that grew in the soil with nest refuse showed significant higher values of all parameters evaluated when compared to the control treatment (p < 0.001). We conclude that this biofertilizer contributed to the production of more vigorous plants, being able to act on the local dynamics of nutrients in the ecosystems where A. balzani occurs. As it is relatively abundant and easy to collect, the refuse of A. balzani has the potential to be used as an alternative substrate in the production of shortlife cycle plants.

Alguns estudos relatam o efeito positivo de resíduos orgânicos de formigueiros nas propriedades do solo e na estrutura da comunidade de plantas adjacentes em experimentos de campo, mas há uma lacuna sobre o efeito em espécies individuais. O objetivo do presente estudo foi comparar o desenvolvimento de Turnera subulata Smith, uma espécie ornamental, na presença do substrato de descarte (SD) de formigueiros produzido pela formiga cortadeira Acromyrmex balzani (Emery, 1890) por meio de experimento em casa de vegetação. O experimento foi conduzido com dois tratamentos: solo controle e solo com 25% de SD. As plantas foram mantidas em vasos de 1L por 90 dias. Foram avaliados os parâmetros: altura da planta, diâmetro do caule, comprimento da raiz, número de folhas, massa seca da raiz, biomassa seca e fresca da parte aérea. Além disso, o conteúdo relativo de clorofila e os nutrientes foliares foram usados como parâmetros fisiológicos. Como resultado, as plantas que cresceram no solo com SD apresentaram valores significativamente maiores de todos os parâmetros avaliados quando comparadas ao tratamento controle (p < 0.001). Concluímos que esse biofertilizante contribuiu para a produção de plantas mais vigorosas, podendo atuar na dinâmica local de nutrientes nos ecossistemas onde A. balzani ocorre. Além disso, por ser relativamente abundante e fácil de coletar, o SD de A. balzani tem potencial para ser utilizado como biofertilizante na produção de plantas de ciclo de vida curta.

Nest refuse of Acromyrmex balzani (Hymenoptera: Formicidae) increases the plant vigor in Turnera subulata (Turneraceae)

Abstract Some studies report the positive effect of organic residues from ant nests on soil properties and on the structure of the adjacent plant community in field experiments, but there is a gap about the effect on individual species. The purpose of the present study was to compare the soil nutrient content and the development of Turnera subulata Smith, an ornamental species, in the presence of the nest refuse (basically composed of fragments of grass leaves and the symbiotic fungus) produced by the leaf-cutting ant Acromyrmex balzani (Emery, 1890) or in control soil through a greenhouse pot experiment. The experiment was carried out with two treatments: control soil and soil with 25% of nest refuse. The plants were kept in 1L pots for 90 days. We evaluated the parameters: plant height, stem diameter, root length, number of leaves, dry weight of the root, dry and fresh aboveground biomass. Additionally, the relative chlorophyll content and leaf nutrients were used as nutritional parameters. As a result, plants that grew in the soil with nest refuse showed significant higher values of all parameters evaluated when compared to the control treatment (p 0.001). We conclude that this biofertilizer contributed to the production of more vigorous plants, being able to act on the local dynamics of nutrients in the ecosystems where A. balzani occurs. As it is relatively abundant and easy to collect, the refuse of A. balzani has the potential to be used as an alternative substrate in the production of shortlife cycle plants.

Resumo Alguns estudos relatam o efeito positivo de resíduos orgânicos de formigueiros nas propriedades do solo e na estrutura da comunidade de plantas adjacentes em experimentos de campo, mas há uma lacuna sobre o efeito em espécies individuais. O objetivo do presente estudo foi comparar o desenvolvimento de Turnera subulata Smith, uma espécie ornamental, na presença do substrato de descarte (SD) de formigueiros produzido pela formiga cortadeira Acromyrmex balzani (Emery, 1890) por meio de experimento em casa de vegetação. O experimento foi conduzido com dois tratamentos: solo controle e solo com 25% de SD. As plantas foram mantidas em vasos de 1L por 90 dias. Foram avaliados os parâmetros: altura da planta, diâmetro do caule, comprimento da raiz, número de folhas, massa seca da raiz, biomassa seca e fresca da parte aérea. Além disso, o conteúdo relativo de clorofila e os nutrientes foliares foram usados como parâmetros fisiológicos. Como resultado, as plantas que cresceram no solo com SD apresentaram valores significativamente maiores de todos os parâmetros avaliados quando comparadas ao tratamento controle (p 0.001). Concluímos que esse biofertilizante contribuiu para a produção de plantas mais vigorosas, podendo atuar na dinâmica local de nutrientes nos ecossistemas onde A. balzani ocorre. Além disso, por ser relativamente abundante e fácil de coletar, o SD de A. balzani tem potencial para ser utilizado como biofertilizante na produção de plantas de ciclo de vida curta.

Nest refuse of Acromyrmex balzani (Hymenoptera: Formicidae) increases the plant vigor in Turnera subulata (Turneraceae) / O substrato de descarte de Acromyrmex balzani (Hymenoptera: Formicidae) aumenta o vigor da planta Turnera subulata (Turneraceae)

Abstract Some studies report the positive effect of organic residues from ant nests on soil properties and on the structure of the adjacent plant community in field experiments, but there is a gap about the effect on individual species. The purpose of the present study was to compare the soil nutrient content and the development of Turnera subulata Smith, an ornamental species, in the presence of the nest refuse (basically composed of fragments of grass leaves and the symbiotic fungus) produced by the leaf-cutting ant Acromyrmex balzani (Emery, 1890) or in control soil through a greenhouse pot experiment. The experiment was carried out with two treatments: control soil and soil with 25% of nest refuse. The plants were kept in 1L pots for 90 days. We evaluated the parameters: plant height, stem diameter, root length, number of leaves, dry weight of the root, dry and fresh aboveground biomass. Additionally, the relative chlorophyll content and leaf nutrients were used as nutritional parameters. As a result, plants that grew in the soil with nest refuse showed significant higher values of all parameters evaluated when compared to the control treatment (p < 0.001). We conclude that this biofertilizer contributed to the production of more vigorous plants, being able to act on the local dynamics of nutrients in the ecosystems where A. balzani occurs. As it is relatively abundant and easy to collect, the refuse of A. balzani has the potential to be used as an alternative substrate in the production of shortlife cycle plants.

Resumo Alguns estudos relatam o efeito positivo de resíduos orgânicos de formigueiros nas propriedades do solo e na estrutura da comunidade de plantas adjacentes em experimentos de campo, mas há uma lacuna sobre o efeito em espécies individuais. O objetivo do presente estudo foi comparar o desenvolvimento de Turnera subulata Smith, uma espécie ornamental, na presença do substrato de descarte (SD) de formigueiros produzido pela formiga cortadeira Acromyrmex balzani (Emery, 1890) por meio de experimento em casa de vegetação. O experimento foi conduzido com dois tratamentos: solo controle e solo com 25% de SD. As plantas foram mantidas em vasos de 1L por 90 dias. Foram avaliados os parâmetros: altura da planta, diâmetro do caule, comprimento da raiz, número de folhas, massa seca da raiz, biomassa seca e fresca da parte aérea. Além disso, o conteúdo relativo de clorofila e os nutrientes foliares foram usados como parâmetros fisiológicos. Como resultado, as plantas que cresceram no solo com SD apresentaram valores significativamente maiores de todos os parâmetros avaliados quando comparadas ao tratamento controle (p < 0.001). Concluímos que esse biofertilizante contribuiu para a produção de plantas mais vigorosas, podendo atuar na dinâmica local de nutrientes nos ecossistemas onde A. balzani ocorre. Além disso, por ser relativamente abundante e fácil de coletar, o SD de A. balzani tem potencial para ser utilizado como biofertilizante na produção de plantas de ciclo de vida curta.

Efficacy analysis of jejunal side anastomosis combined with jejunal nutrition tube in gastric cancer surgery / 中国综合临床

Objective:To investigate the adverse reactions and postoperative inflammatory reactions of Bill-Roth Ⅱ (BⅡ) gastroenterostomy with jejunal anastomosis and jejunal nutrient tube placement using linear cutting and closing device in gastric cancer surgery.Methods:A retrospective case-control study was conducted on 93 patients undergoing gastric cancer surgery in The Affiliated Hospital of North China University of Science and Technology from February 2017 to April 2020. According to 2016 (American Joint Committee on Cancer/Universal Integrated Circuit Card) AJCC/UICC, (Tumor, Node, stage; Tumor lymph node metastasis; Distant metastasis) TNM, there were 11 cases in stage ⅠA, 14 cases in stage ⅠB, 13 cases in stage ⅡA, 15 cases in stage ⅡB, 11 cases in stage ⅢA, 13 cases in stage ⅢB, and 16 cases in stage ⅢC. There were 51 cases of gastric antrum carcinoma, 26 cases of gastric body carcinoma and 16 cases of gastric pylorus carcinoma. There were 27 cases of papillary adenocarcinoma, 26 cases of tubular adenocarcinoma, 22 cases of mucinous adenocarcinoma, 9 cases of signet-ring cell carcinoma, 7 cases of adenosquamous carcinoma, and 2 cases of squamous carcinoma. The patients were divided into experimental group (48 cases) and control group (45 cases) according to whether or not the linear cutting and closing device was added and jejunal anastomosis was performed and jejunal nutrition tube was placed. The gender composition, age, lesion site, pathological type, pathological stage, postoperative hospital stay and postoperative complications were compared between the two groups, and the white blood cell count WBC, C-reactive protein CRP on the 7th day after surgery, erythrocyte Sedimentation rate (ESR), tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6) inflammation indicators were compared between the two groups.Results:There was no significant difference in gender composition, age, lesion location, pathological type and pathological stage between the two groups (all P>0.05). The incidence of abdominal pain, abdominal distension, nausea, vomiting and pleural effusion in 93 patients were 18.3%(17/93), 21.5%(20/93), 23.7%(22/93), 17.2%(16/93) and 18.3%(17/93), respectively. The complication rates of the above indexes in the two groups were 10.4% (5/48) Compared with 26.7% (12/45), 12.5% (6/48) and 31.1% (14/45), 15.6%(7/48) and 33.3% (15/45), 8.3%(4/48) and 26.7% (12/45), 8.3% (4/48) and 28.9% (13/45) (χ 2 values were 4.11, 4.77, 4.52, 4.27 and 5.27, respectively; P values were 0.043, 0.029, 0.033, 0.039 and 0.022, respectively). There was no significant difference in lower extremity venous thrombosis, anastomotic bleeding, accumulated pneumonia and incision dehiscence between the two groups ( P>0.05). WBC on the 7th day after operation in the experimental group and the control group (7.02±1.83)×10 9/L and (8.39±2.27)×10 9/L ( t=3.22, P=0.002), TNF-α (2.44±0.70) μg/L and (3.56±1.14) μg/L ( t=5.71, P<0.001), IL-6 (235.31±41.72) μg/L and (365.91±73.16) μg/L ( t=10.66, P<0.001) there was significant difference between the two groups. There was no significant difference in CRP and ESR between the two groups on the 7th day after operation ( P>0.05). The postoperative hospital stay between the experimental group and the control group was (13.88±2.81) d and (22.78±2.51) d, the difference was statistically significant ( t=16.07, P<0.001). Conclusion:The application of side-to-side jejunostomy combined with jejunal nutrition tube for enteral nutrition in gastric cancer surgery can reduce the occurrence of adverse reactions such as postoperative abdominal pain, abdominal distension, accumulated pneumonia, nausea, vomiting and pleural effusion, reduce the postoperative hospital stay and reduce the postoperative inflammatory reaction to a certain extent.

Evaluation of the application of self-made lithotomy heating mask in radical resection of rectal cancer / 中国实用护理杂志

Objective:To evaluate the effect of self-made lithotomy heating mask on intraoperative and postoperative body temperature and short-term postoperative outcome indicators in patients undergoing radical resection of rectal cancer.Methods:Using the method of quasi experimental research design, 100 patients with open rectal cancer in Ningbo Huamei Hospital of the University of Chinese Academy of Sciences from February to July 2021 were selected as the research objects. The patients were divided into experimental group and control group with 50 cases in each group. The control group was kept warm by routine methods, and the experimental group was kept warm by self-made lithotomy heating hood. The changes of core temperature at different time points before, during and after operation were compared between the two groups. The incidence of accidental hypothermia and shivering, the recovery time of anesthesia, and the incidence of various complications within 48 hours after operation were compared between the two groups after operation from the beginning of the operation to 6 hours after returning to the ward.Results:From 30 minutes after anesthesia to 3 hours after entering the ward, the core temperatures of the experimental group at 10 time points were higher than that of the control group, and the differences were statistically significant ( t values were 3.48-37.30, all P<0.01). From the beginning of surgery to 6 h after returning to the ward, the incidence of perioperative accidental hypothermia in the experimental group was 2% (1/50), lower than 24% (12/50) in the control group, and the difference was statistically significant ( χ2=11.06, P<0.05) . The number of cases of shivering in the experimental group was 10, lower than that in the control group of 22, the difference was statistically significant ( χ2=6.62, P<0.05) . The recovery time, extubation time and stay time in anesthesia recovery room of the experimental group were (8.44 ± 2.83), (13.05 ± 4.72), (74.51 ± 11.82) min, which were shorter than those of the control group (15.35 ± 2.09), (17.62 ± 3.28), (89.14 ± 9.19) min, and the difference was statistically significant ( t=-13.89, -5.62, -6.91, all P<0.01). The number of cases of agitation, delirium and nausea and vomiting in the experimental group was 3, 1 and 2 respectively, which was lower than 13, 7 and 8 in the control group, and the difference were statistically significant ( χ2=7.44, 4.89, 4.00, all P<0.05). There was no significant difference in the incidence of adverse cardiac events between the two groups ( P>0.05). Conclusions:The application of self-made lithotomy heating mask in open rectal cancer surgery can effectively improve the risk of hypothermia at different time points during and after surgery, reduce the incidence of shivering, restlessness, postoperative nausea, vomiting and delirium, shorten the time of awakening and extubation, and prevent postoperative complications. It has practical value in clinic.

Central corneal cutting error with small incision lenticule extraction surgery in different refractive degrees of myopia / 国际眼科杂志(Guoji Yanke Zazhi)

@#AIM: To study the cutting error of central corneal thickness(CCT)after small incision lenticule extraction(SMILE)in patients with different degrees of myopia. <p>METHODS: Myopic patients who had undergone SMILE surgery from May 2020 to September 2020 at the Jiangsu Province Hospital were included in the study. Data were organized by refractive status into low, moderate, and high myopia groups. The CCT was measured by the Pentacam anterior segment analysis system preoperatively and postoperatively at 1 and 3mo. Among different myopia groups, the cutting error(ΔCCT, defined as the difference between actual CCT and the predicted CCT)was calculated simultaneously during each visit. The difference ratio of ΔCCT and the relationship between ΔCCT, CCT, and cutting diameter were analyzed. <p>RESULTS: There were 221 patients(432 eyes)included in our study. At 3mo after operation, the ΔCCT in the high myopia group was larger than the low and moderate myopia group(χ²=225.74, 62.55; all <i>P</i><0.01), and the moderate myopia group was larger than the low myopia group(χ²=132.77, <i>P</i><0.01). The cutting deviation rate was also significantly different among three groups at 1 and 3mo after surgery. Pearson correlation analysis found that there was a linear regression relationship among preoperative refractive power, optical zone diameter and the central corneal cutting error at 3mo after operation(<i>r</i>=0.699, <i>P</i><0.001; <i>r</i>=0.572, <i>P</i><0.001). <p>CONCLUSION: The ΔCCT after SMILE increased with the increased of myopia, and the cutting error was positively correlated with preoperative equivalent spherical power and optical zone diameter.

Rescue and vegetative propagation of Eremanthus erythropappus (DC. ) Ma ish in natural stand / Resgate e propagação vegetativa de Eremanthus erythropappus (DC. ) MacLeish em povoamentos naturais

Abstract The native stands of 'candeia' (Eremanthus erythropappus) have been explored through management plans due to the economic potential of essential oil. The rescue of adult trees, as well as the application of silvicultural techniques that favor the restoration of the stand, can contribute to the genetic conservation of this species. This study's objective was to assess the efficiency of propagation techniques for the rescue of 26 matrices of 'candeia' in a natural managed stand and discussion about the rhizogenesis. In August 2017, trees were induced to regrowth by coppice, followed by exposure and scarification of roots. The emergence of shoots and morphology were evaluated according to the origin (i.e., stump or root). After that period, 19 matrices had their sprouts collected for the preparation of apical cuttings. Indole-3-butyric acid (IBA) was applied at the base of the cuttings. Cutting survival at greenhouse exit (GE), rooting at shade house exit (SHE), morphology and root anatomy were evaluated. In 189 days, the scarification of roots promoted 76.92% of budding. The percentage of sprouted matrices, number of shoots per matrice, length, diameter, and shoot length/diameter ratio increased over time. Only 12.2% of the cuttings survived in GE, and of these, 7.9% rooted in SHE. The cutting resulted in the formation of a clonal mini-garden of 'candeia', with seven of the 19 matrices submitted to propagation. The anatomical analyses showed that bud formation occurs from cell redifferentiation in the phloem parenchyma, and presence of crystals on the walls of the vessel elements of the secondary xylem. The shoots induction from scarification of roots could be used as a silvicultural practice for the reestablishment of the native fragments handle.

Resumo Os povoamentos nativos de candeia (Eremanthus erythropappus) vêm sendo explorados por planos de manejo devido ao potencial econômico do óleo essencial. O resgate de árvores adultas, bem como a aplicação de técnicas silviculturais que favoreçam o restabelecimento do povoamento podem contribuir para a conservação genética dessa espécie. O objetivo desse trabalho foi avaliar a eficiência de técnicas de propagação para o resgate de 26 matrizes de candeia em um povoamento natural manejado e discutir sobre a rizogênese. Em agosto de 2017, as árvores foram induzidas à rebrota por meio da decepa, seguida da exposição e escarificação das raízes. A emissão brotações e morfologia foram avaliadas de acordo com a origem (toco ou raiz). Após esse período, 19 matrizes tiveram as brotações recolhidas para o preparo de estacas apicais, que foram tratadas com ácido indolbutírico (AIB). A sobrevivência das estacas na saída da casa de vegetação (SCV), o enraizamento na saída da casa de sombra (SCS), a morfologia e a anatomia da raiz foram avaliados. Aos 189 dias, a escarificação das raízes resultou em 76,92% de emissão de brotos. O percentual de matrizes brotadas, número de brotos por matriz, comprimento, diâmetro e relação comprimento/diâmetro dos brotos aumentaram ao longo do período avaliado. Somente 12,2% das estacas sobreviveram na SCV e 7,9% enraizaram na SCS. A estaquia resultou na formação de um minijardim clonal de candeia com sete das dezenove matrizes submetidas à propagação. As análises anatômicas mostraram a diferenciação das células na região do parênquima floemático e a presença de cristais de inulina nas paredes dos elementos de vaso do xilema secundário. A indução de brotos radiculares pode ser usada como prática silvicultural visando o restabelecimento de fragmentos nativos manejados.

Nuevos factores de riesgo de hemorragia pulmonar que complican la biopsia pulmonar guiada por TC en técnica coaxial / Novel risk factors of pulmonary hemorrhage complicating CT-guided lung biopsy in coaxial technique

Objetivos: Evaluar la frecuencia y gravedad de la hemorragia parenquimatosa pulmonar tras la biopsia pulmonar con aguja transtorácica coaxial, según factores de procedimiento, aún no descritos en la literatura. El objetivo de este estudio fue determinar si la elección de la tecnología de biopsia coaxial, el posicionamiento del paciente y la dignidad de la lesión son tres nuevas variables que influyen en el riesgo de hemorragia parenquimatosa tras biopsias coaxiales de pulmón. Métodos: Se revisaron retrospectivamente los registros de 117 pacientes que se sometieron a biopsias con aguja transtorácica del pulmón entre enero de 2018 y abril de 2020. El resultado primario fue la hemorragia pulmonar. Se ha utilizado un sistema de clasificación para clasificar la hemorragia parenquimatosa pulmonar: Grado 0 - Grado 3. Se evaluaron tres variables novedosas relacionadas con el paciente, la técnica y la lesión como predictores de hemorragia pulmonar: tecnología de biopsia coaxial, posición del paciente y dignidad de la lesión. Resultados: De los 117 pacientes, 18 (15,4%) pacientes con tecnología de biopsia coaxial de corte, versus 29 (24,8%) pacientes con tecnología coaxial de núcleo completo mostraron hemorragia significativa en las exploraciones de control posteriores a la biopsia. (IC del 95% 0,06-0,33, p <0,0001). No hubo diferencias significativas en la hemorragia pulmonar entre el diagnóstico histológico benigno y maligno (IC 95% 0,84-4,44, p = 0,1199) y la posición del paciente en decúbito prono o supino (IC 95%: 0,57-2,57, p = 0,6232). Conclusiones: La incidencia y gravedad de la hemorragia pulmonar depende de la tecnología de biopsia coaxial utilizada; siendo mayor en pacientes sometidos a una biopsia con tecnología full-core y menor después del uso de tecnología de corte. En este estudio de pronóstico no se estableció una correlación significativa entre la hemorragia pulmonar parenquimatosa y la posición del paciente o la dignidad de la lesión

Objectives: To evaluate the frequency and severity of pulmonary parenchymal hemorrhage after coaxial transthoracic needle biopsy of the lung, according to procedural factors, not yet described in literature. The aim of this study was to determine whether the choice of the coaxial biopsy technology, patient positioning and the lesion dignity are three new variables influencing the risk of parenchymal hemorrhage after coaxial biopsies of the lung. Methods: Records from 117 patients who underwent transthoracic needle biopsies of the lung between January 2018 and April 2020 have been retrospectively reviewed. The primary outcome was pulmonary hemorrhage. A grading system has been used to classify pulmonary parenchymal hemorrhage: Grade 0 ­ Grade 3. Three novel patient, technique and lesion-related variables were evaluated as predictors of pulmonary hemorrhage: coaxial biopsy technology, patient positioning and lesion dignity. Results: Out of the 117 patients, 18 (15,4%) patients with cutting coaxial biopsy technology, versus 29 (24,8%) patients with full core coaxial technology showed significant hemorrhage on the post-biopsy control scans. (95% CI 0,06-0,33, p<0,0001). No significant difference in pulmonary hemorrhage between benign and malignant histological diagnosis (95% CI 0,84-4,44, p=0,1199) and prone or supine patient positioning (95% CI: 0,57-2,57, p= 0,6232) was found. Conclusions: The incidence and severity of pulmonary hemorrhage depends on the coaxial biopsy technology used; being higher in patients undergoing a biopsy with full-core technology and lower after the use of cutting technology. No significant correlation between parenchymal pulmonary hemorrhage and patient positioning or lesion dignity was established in this prognostic study.