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【Objective】 To conduct the laboratory quality assessment between 12 blood stations in Hebei province, analyze the results and explore the accuracy and comparability of testing, so as to improve the level of testing ability and quality management. 【Methods】 With reference to the external quality assessment rules of National Center for Clinical Laboratories and combined with the instructions of quality assessment samples, daily testing process of the laboratories were assessed. The quality indicators include blood cell count (WBC, RBC, Hb, HCT, MCV, MCH, MCHC and PLT), biochemical items (TP) and coagulation parameters (FIB and FⅧ). 【Results】 There are still problems in laboratories in terms of personnel operation, instrument maintenance and the impact of different reagent batches, especially in biochemical items and coagulation parameters. The pass rate of biochemical items was the lowest, only 72.75%, and that of blood cell count was the highest, reaching 98.75%. 【Conclusion】 With the progress of the project, the quality monitoring level of daily blood sampling tests in the quality control laboratory of each blood station has been improved. However, it is still necessary for each laboratory to improve the testing ability and quality management to a higher level in Hebei.
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A 28-year-old male patient presented with a 4-year history of a solitary brown mass, and a 1-year history of multiple small papules on the left chest. Skin examination showed a quasi-round brown firm mass measuring about 1.2 cm × 1.1 cm × 1.0 cm in size on the left chest, and several brown papules with diameters ranging from 3 to 5 mm on the right side of the mass; no enlarged lymph nodes were detected in the left axilla on palpation. The mass and papules were completely resected, and histopathological examination showed clustered nevus cells in the superficial dermis of the mass and small papules, and the diagnosis of intradermal nevus was considered. There was a desmoplastic nodule in the mass, nevus cells were scattered among the fibers in the nodule, and giant nevus cells were also observed; the nevus cells in the nodule were relatively larger, epithelioid or spindle-shaped with round or spindle-shaped nuclei, obvious nucleoli, and rare mitotic figures. Immunohistochemical study showed that the nevus cells in both the intradermal nevus and proliferative nodule were positive for S100; the nevus cells in the superficial dermis of the intradermal nevus were positive for Melan-A and HMB45, while the nevus cells in the proliferative nodule were negative for Melan-A and HMB45; both the intradermal nevus and proliferative nodule tissues showed a Ki-67 index of 1%, positive staining for CD34, but negative staining for P16 and P63. Finally, the patient was diagnosed with intradermal nevus associated with desmoplastic nodule.
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Percutaneous vertebroplasty (PVP) is a minimally-invasive technique,which has been widely employed in the treatment of hemangiomas,vertebral compression fractures,spinal metastases,myeloma and other diseases.Clinically,it is generally believed that the curative effect of PVP is closely related to the injected amount of bone cement.However,there is still great controversy over the optimal injection volume of bone cement.Based on the current researches both at home and abroad,this article aims to make a brief introduction about the relevant vertebral biomechanical factors that might affect the injection volume of bone cement,the influence of the injected volume of bone cement on the vertebral strength,rigidity and adjacent vertebral bodies.The main current disputes are pointed out so as to lay the foundation for further study.
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Along with the aging of population in China,more and more people suffer from osteoporosis.As a consequence,osteoporotic vertebral compression fracture has become one of the major clinical issues.More and more patients like to take percutaneous vertebroplasty (PVP) as the preferred treatment,thus,the number of patients who develop recurrent vertebral fracture after PVP is also increased.In recent years,more and more attention has been paid to the recurrent fractures after PVP for vertebral compression fractures by clinicians.In order to reduce the incidence of recurrent vertebral fracture after PVP,it is necessary to make the further and deep studies on the risk factors that cause recurrent vertebral fractures.This paper aims to make a comprehensive review about the risk factors that may cause recurrent vertebral fractures after PVP for osteoporotic vertebral compression fracture.
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Being put forward more than ten years ago, DNA barcoding technology has now become a hotspot in the related domestic and international fields of food safety and animal protection in species identification, which can characterize the species in a fast and accurate way to provide scientific evidence for the judicial practice. This paper summarizes the principle, development and application prospects of DNA barcoding technology.
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Objective To assess the clinical value of percutaneous bone cement fusion in treating stress fracture of vertebral body that is adjacent to pseudoarthrosis in patients with ankylosing spondylitis.Methods The clinical data of 4 ankylosing spondylitis patients with stress fracture of vertebral body adjacent to pseudoarthrosis,which was treated with percutaneous bone cement fusion,were retrospectively analyzed.Bone cement fusion through injection of bone cement was performed for 4 vertebral segments.Visual analogue scale (VAS) of pain and Oswesty disability index (ODI) were determined before and after operation,the results were compared,and the improvements of pain and daily activity were evaluated.Results The operation was successfully accomplished in all the 4 patients.The mean used amount of bone cement for each vertebral segment was 14.5 ml.Small amount of bone cement extravasation was observed in one patient,but no severe clinical complication occurred.The mean VAS score decreased from preoperative 9 points to postoperative 3.5 points;ODI score decreased from preoperative 43.8 points to postoperative 14.5 points.After the treatment,the pain was obviously relieved and the daily activity was markedly improved.Conclusion For the treatment of stress fracture of vertebral body that is adjacent to pseudoarthrosis in patients with ankylosing spondylitis,percutaneous bone cement fusion is minimally-invasive,safe and effective.
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Objective To investigate the genetic polymorphisms of 27 Y-chromosomal short tandem repeats (Y-STR) loci included in Yfiler(R) Plus kit in Han population of Chaoshan area,and explore the population genetic relationships and evaluate its application value on forensic medicine.Methods By detecting 795 unrelated Chaoshan Han males with Yfiler(R) Plus kit,haplotype frequencies and population genetics parameters of the 27 Y-STR loci were statistically analyzed and compared with available data of other populations from different races and regions for analyzing the genetic distance and clustering relation of Chaoshan Han population.Results Seven hundred and eighty-seven different haplotypes were observed in 795 unrelated male individuals,of which 779 haplotypes were unique,and 8 haplotypes occurred twice.The haplotype diversity (HD) was 0.999975 with discriminative capacity (DC) of 98.99％.The gene diversity (GD) at the 27 Y-STR loci ranged from 0.3637(DYS391) to 0.9559(DYS385a/b).Comparing with Asian reference populations,the genetic distance (Rst) between Chaoshan Han and Guangdong Han was the smallest (0.0036),while it was relatively larger between Chaoshan Han and Gansu Tibetan population (0.0935).The multi-dimensional scaling (MDS) plot based on Rst values was similar to the results of clustering analysis.Conclusion Multiplex detection of the 27 Y-STR loci reveals a highly polymorphic genetic distribution in Chaoshan Han population,which demonstrates the important significance of Yfiler(R) Plus kit for establishing a Y-STR database,studying population genetics,and for good practice in forensic medicine.
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Objective To investigate the relationship between the cystic fluid characteristics of symptomatic sacral canal cyst and the interventional therapeutic prognosis.Methods A total of 114 patients with symptomatic sacral canal cyst were enrolled in this study.Clinically,all patients complained of discomfort at lumbosacral area.Among the 114 patients,86 were primary sacral canal cyst and 28 were recurrent sacral canal cyst.Under DSA guidance,percutaneous puncturing of the cyst was performed,2-5 ml cerebrospinal fluid (CSF) was aspirated and sent for laboratory tests.Then a small amount of nonionic contrast agent was injected into the cyst to determine whether the cyst was communicated with the subarachnoid space or not.Finally,double-needle method was used to aspirate the cyst fluid.Results Radiography showed that communication between the cyst and subarachnoid space was detected in 66 patients (group A),while no communication between the cyst and subarachnoid space was observed in 48 patients (group B).In patients with primary symptomatic sacral canal cyst,the differences in the sugar and chloride levels of CSF between group A and group B were statistically significant.In patients with recurrent symptomatic sacral canal cyst,the differences in the sugar,protein and chloride levels of CSF between group A and group B were also statistically significant.Statistically significant correlation existed between the single or multiple CSF changes and the interventional therapeutic prognosis.Conclusion Sacral canal cysts can be classified into two types:cyst-subarachnoid space communicating type and cyst-subarachnoid space non-communicating type.The characteristics of CSF in patients with primary symptomatic sacral canal cyst are different from those in patients with recurrent symptomatic sacral canal cyst.Multiple CSF changes,the increased sugar level and decreased chloride level in CSF are well correlated with the interventional therapeutic prognosis.
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BACKGROUND:Percutaneous vertebraplasty is a new means for the treatment of vertebral compression fractures and bone metastases. The multiplaner reconstruction with digital substraction angiography (DSA)-Innova 3D plays an important role in guiding the percutaneous vertebraplasty puncture, which can effectively prevent the leakage of bone cement. OBJECTIVE:To explore the value of DSA-Innova 3D in the guidance of puncture of percutaneous vertebroplasty. METHODS:From March 2014 to September 2014, a total of 72 patients with 94 vertebras were selected for percutaneous vertebraplasty, of whom 36 (48 vertebras) with Innova 3D (experimentalgroup) and 36 (46 vertebras) without Innova 3D (control group). Spiral CT scan was performed in al patients to assess the distribution of bone cement. The imaging quality in the two groups was compared by Mann-Whitney U test. RESULTS AND CONCLUSION:CT showed bone cement leakage occurred in 7 of the 36 patients in the control group. Leakages were into the lumber disc in two cases, paravertebral space in two cases, vertebral pedicle in onecase or veins in two cases. However, only one case of bone cement leakage was observed in the experimental group. With the guidance of DSA-Innova 3D, the experimental group had signficantly lower leakage and fluoroscopic time than the control group (P < 0.05). The multiplaner reconstruction with DSA-Innova 3D plays an important role in guiding the percutaneous vertebraplasty puncture, thereby effectively reducing the leakage of bone cement.
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Objective To discuss the feasibility and short-term clinical effectiveness of DSA-guided percutaneous vertebroplasty (PVP) for the treatment of painful osteoblastic metastatic spinal lesions. Methods During the period from Jan. 2010 to Dec. 2011 at authors’ hospital PVP was carried out in 23 patients with osteoblastic spinal metastases (34 lesions in total). Coexisting osteoblastic pathological fracture was found in twelve patients. The WHO standards, visual analogue scale (VAS) and karnofsky-KPS score were used to evaluate the therapeutic results. Results Technical success was achieved in all patients. All patients were followed up for at least 3 months. Of 20 patients who had complete clinical data, complete remission (CR) was obtained in 6, partial remission (PR) in 10, mild remission (MR) in 3 and no remission (NR) in one. The clinical effectiveness (CR+PR) was 80%. The mean VAS scores dropped from preoperative (7.0 ± 1.6) to (2.2 ± 1.9) at 24 hours after the treatment, and to (2.4 ± 2.1) and (2.5 ± 2.1) at one and three months after the treatment respectively. The mean KPS scores rose from preoperative (76.5 ± 10.4) to (86.5 ± 11.8), (88.0 ± 12.0) and (89.0 ± 10.8) at 24 hours and one, three months after the treatment respectively. Small amount leakage of PMMA was observed in 4 cases (17.4%) with no obvious clinical symptoms. Conclusion DSA-guided PVP is a feasible and effective treatment for painful osteoblastic spinal metastases. This therapy can immediately relieve pain and reinforce spine, besides, it can remarkably improve the living quality and decrease the incidence of paraplegia.
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Objective To discuss the feasibility and clinical application of percutaneous internal fixation (PIF) combined with pecutaneous osteoplasty (POP) for the treatment of metastasis of proximal femur with impending pathological fracture. Methods Six consecutive patients with metastases of the proximal femur, who could not be able to tolerate conventional surgery, underwent PIF together with POP. The results were analyzed. Results The procedure was successfully accomplished in all six patients. Neither pulmonary embolism nor death occurred in all patients during and after the operation. No fracture at operated area was observed during follow-up period. Conclusion For stabilization of proximal femoral metastatic lesion with impending pathological fracture, percutaneous internal fixation combined with pecutaneous osteoplasty is a safe and effective technique.
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To establish vascular endothelial growth factor (VEGF) and interleukin-8 (IL-8) as secretary biomarkers for cell growth on topographic substrates, we have evaluated the secretion and expression of these 2 factors by SH-SY5Y human neuroblastoma cells on poly-L-lactide (PLLA) micropillar arrayed topographic substrates. We fabricated topographic substrates with UV lithography, silicon etching and polydimethylsiloxane-based replica molding, and interfaced SH-SY5Y human neuroblastoma cells with both the topographic substrates and PLLA flat substrates. Cell morphology and spreading were examined with scanning electron microscopy. The secretion and mRNA expression of VEGF and IL-8 were evaluated with enzyme linked immunosorbent assay (ELISA) and real time qPCR, respectively, 24 hours after cell plating. We successfully achieved 4 topographic substrates with a nominal pillar diameter of 2 microm and 4 microm, and a nominal pillar spacing of 2 microm and 7 microm. We found that the secretion and mRNA expression of VEGF and/or IL-8 by SH-SY5Y cells on 2-2 microm (pillar diameter-spacing), 4-2 microm and 4-7 microm topographic substrates were upregulated in comparison to those by cells on PLLA flat substrate, 24 hours after cell plating. Furthermore, both cytokines were even more substantially upregulated on the 2-7 microm substrate than on the other 3 topographic substrates. Compared to those on PLLA flat substrate, cells on topographic substrates showed significant changes in morphology (spreading area, perimeter and roundness), and the increase in the secretion and mRNA expression of VEGF and IL-8 was accompanied with a decrease in cell spreading areas. These results provided evidence that pillar arrayed topography was an important microenvironmental factor in affecting VEGF and IL-8 expression or secretion, and VEGF and IL-8 might serve as important secretary biomarkers for growth on topographic substrates by SH-SY5Y cells.
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Humanos , Biomarcadores , Linhagem Celular , Proliferação de Células , Microambiente Celular , Interleucina-8 , Genética , Secreções Corporais , Neuroblastoma , Secreções Corporais , Poliésteres , Química , RNA Mensageiro , Genética , Fator A de Crescimento do Endotélio Vascular , Genética , Secreções CorporaisRESUMO
@#ObjectiveTo investigate effects of electroacupuncture(EA) of Zusanli(ST36) on changes of substance P(SP) mRNA expression in rat brain stem.Methods78 SD rats were evenly randomized into Zuanli-EA group, non-acupoint group, bondage groups(at the end of 2h,4h,6h,8h after 30 minute EA stimulation in each group) and control group. RT-PCR and image processing were used to study the change of SP mRNA level in brain stem.ResultsIn control groups,there was SP expression. An increase of SP mRNA expression was seen in Zusanli group and non-acupoint group comparing with control group at the end of 2h after 30min EA stimulation(P<0.05).There was difference between above two groups at the end of 6h and 8h(P<0.05).ConclusionEA stimulation elicited an accelerated expression of SP gene. Zusanli-EA stimulation can increased this expression, which may constitute one of the mechanisms for gastrointestinal motility and eletroacupuncture analgesia.
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@#ObjectiveTo study the special effect of oxytocin and vasopressin mRNA expression by acupuncturing acupoint ST36.Methods78 SD male rats were divided into four groups, acupuncturing ST36 group, acupuncturing para-acupoint ST36 group, bondage group and control group. RT-PCR was used to observe the oxytocin and vasopressin mRNA expression in 2,4,6,8 hours after acupuncture, semi-quantitative result was obtained by using image analysis system.ResultsOxytocin mRNA expression in hypothalamus in 2,4 hours was the statistically significant different in acupuncturing para-acupoint ST36 group contrast with other three groups, while there was not statistically different between all groups on oxytocin mRNA expression in 6,8 hours. Vasopressin mRNA expression in hypothalamus in 2,4,6,8 hours was statistically depressed in acupuncturing acupoint ST36 contrast with other three groups.ConclusionOxytocin mRNA expression in hypothalamus increases for short time after acupuncturing para-acupoint ST36. Vasopressin mRNA expression in hypothalamus decreases for long time after acupuncturing acupoint ST36.
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Objective To investigate the specific humoral immunity and the therapeutic effect of nasal tolerance with a dual analogue (Lys262-Ala207) in the patients with myasthenia gravis (MG). Methods The levels of serum anti-AChR IgG and anti-AChR IgG isotype were determined with ABC-ELISA in 39 MG patients before and after treatment with Lys262-Ala207 and also in controls. cAMP was measured at the same time. The clinical severity and prognosis of MG were evaluated with Xu′s clinical scoring system. Results There was different in total IgG content among all groups. However the IgG 2 content was lower after the treatment and that of control (P