Effect of high-frequency repetitive transcranial magnetic stimulation in M1 region combined with dorsolateral prefrontal cortex on electroencephalogram θ frequency band amplitude of patients with neuropathic pain after spinal cord injury / 中国康复理论与实践

ObjectiveTo explore the efficacy of high-frequency repetitive transcranial magnetic stimulation (rTMS) in M1 region combined with dorsolateral prefrontal cortex (DLPFC) on electroencephalogram (EEG) θ frequency band amplitude of patients with neuropathic pain (NP) after spinal cord injury. MethodsFrom June, 2022 to June, 2023, 50 NP patients after SCI in Qingdao University Affiliated Hospital were included and divided into M1 region stimulation group (n = 25) and M1 region combined with DLPFC stimulation group (the combined stimulation group, n = 25). M1 region stimulation group received 10 Hz rTMS in the left M1 region, while the combined stimulation group received same stimulation in left M1 region combined with DLPFC, for three weeks. Before and after intervention, the pain was assessed with Short Form of McGill Pain Questionnaire (SF-MPQ), the depression and anxiety status were evaluated using Hamilton Depression Scale (HAMD) and Hamilton Anxiety Scale (HAMA), and the EEG θ frequency band amplitude was recorded to detect the changes of brain electrophysiological activity. ResultsFour cases in M1 region stimulation group, and two cases in the combined stimulation group were dropped. After intervention, the total score of SF-MPQ and the scores of the subscales, the scores of HMMD and HAMA decreased in both groups (|t| > 2.523, P < 0.05). The EEG θ frequency band amplitude significantly reduced in the prefrontal and frontal regions in M1 region stimulation group (|t| > 5.243, P < 0.001), and it also significantly reduced in the prefrontal, frontal regions, central and parietal regions in the combined stimulation group (|t| > 4.630, P < 0.001). All the scores were lower (|t| > 2.270, Z = -1.973, P < 0.05), and the EEG θ frequency band amplitude in the prefrontal, frontal regions, central and parietal regions were lower (P < 0.05) in the combined stimulation group than in M1 region stimulation group. ConclusionHigh frequency rTMS is an effective analgesic method on NP after SCI, which can improve their depression and anxiety symptoms and reduce the EEG θ frequency band amplitude. Compared with M1 region rTMS stimulation, the combination of M1 region and DLPFC rTMS is more effective.

Differential Analysis of Erythrocyte Flexibility of PbK173 Artemisinin-sensitive Strains / 中国实验方剂学杂志

ObjectiveTo detect the flexibility differences of Plasmodium berghei K173 （PbK173）-infected red blood cells with varying degrees of sensitivity to artemisinin-based drugs and to preliminarily explore the underlying mechanisms of the differences. MethodA total of 102 specific-pathogen-free （SPF） male C57BL/6 mice were randomly divided into three groups， with 30 mice each in the control group and PbK173-resistant （PbK173-R） group， and 42 mice in the PbK173-sensitive （PbK173-S） group. Except for the control group， the rest groups were vaccinated with 1×107 PbK173-S/PbK173-R infected red blood cells to establish a mouse malaria model. During the administration and recovery periods （control group， PbK173-R/PbK173-S）， dihydroartemisinin （DHA， 40 mg·kg-1） and malaridine （MD， 6 mg·kg-1） were administered continuously for four days. Peripheral blood was taken from the PbK173-S/PbK173-R groups with an infection rate equal to or greater than 20%. Peripheral blood and each organ were taken on the first day at the end of administration （dosing period） and on the fifth day at the end of administration （recovery period）， and blood parameters and organ indices of each group were examined. The osmotic fragility of peripheral blood red blood cells in each group was detected using the red blood cell osmotic fragility test. Western blot was applied to determine the levels of Piezo1 and Band3 proteins in the red blood cell membrane. ResultDuring the administration and recovery periods， there were no significant differences between the PbK173-S MD group and the DHA group. During the administration period， there were no significant differences in hematological parameters between PbK173-S and PbK173-R in the MD group. However， during the recovery period， the red blood cell count， hemoglobin concentration and hematocrit of the PbK173-R group were significantly higher than those of the PbK173-S group （P<0.05） in the MD group. Compared with that of the control group， the osmotic fragility of the PbK173-S/PbK173-R groups was significantly enhanced （P<0.01）， and the osmotic fragility of the PbK173-S group was significantly stronger than that of the PbK173-R group （P<0.01）. The osmotic fragility of red blood cells in the PbK173-S group during the administration period was significantly stronger than that in the control group and PbK173-R group during the administration period （P<0.01）. The osmotic fragility of red blood cells in the PbK173-R group during the recovery period was significantly higher than that in the control group during the administration period and the PbK173-S group during the recovery period （P<0.05）. Compared with those in the control group， the Piezo1 protein and Band3 protein in the red blood cell membrane of the PbK173-S group were significantly reduced （P<0.01）. Compared with those in the PbK173-R group， the Piezo1 protein and Band 3 protein in the red blood cell membrane of the PbK173-S group were significantly reduced. ConclusionThe flexibility of PbK173-infected red blood cells with different sensitivities to artemisinins differed. Plasmodium-infected red blood cells significantly reduced the levels of Piezo1 and Band3 proteins in the red blood cell membrane， and the erythrocyte flexibility exhibited a decreasing trend in the following order： normal group， PbK173-R group， and PbK173-S group.

Development of a low-cost simulator for training in hemorrhoidal ligation

Introduction: Rubber band ligation is a minimally invasive outpatient hemorrhoid treatment with low cost, low complication rates, and rapid realization. It is performed with the aid of an anoscope and uses a rubber ring that surrounds the hemorrhoidal nipple, causing compression of the vascular structures of the tissue, leading to necrosis and remission of the hemorrhoid. No device for training this essential procedure for treating this pathology has been identified in the literature. Therefore, we aim to develop a low-cost simulator for training hemorrhoidal rubber ligation. Methods: The model was constructed using PVC pipe wrapped in neoprene fabric. Hemorrhoidal nipples and the pectineal line were also simulated using fabric and sewing threads. The procedure is performed with conventional anoscope and ligature forceps. Conclusion: The device in question is a low-cost simulation model designed to train the skills required to perform a rubber band ligation and review the basic anatomy of the anal canal during anoscopy. Given these qualities, the model can be used for academic training due to its low cost and simplicity of application. (AU)

Comparison between white light endoscopy and narrow-band imaging endoscopy in predicting histological healing of ulcerative colitis in remission / 中华消化内镜杂志

Objective:To investigate the predictive value of mucosal vascular pattern (MVP) under narrow-band imaging (NBI) enteroscopy in patients with ulcerative colitis (UC) in clinical remission for histological healing and clinical recurrence.Methods:A total of 142 patients with UC in clinical remission who visited the First Affiliated Hospital of Weifang Medical University from January 2018 to January 2021 were included in the study and underwent colonoscopy. The white light and NBI endoscopic images were collected and biopsies were obtained. The Mayo endoscopic score (MES) was calculated based on white light images, and MVP staging was evaluated based on mucosal vascular patterns under NBI. Nancy index (NI) was used to evaluate histological healing and patients were followed up for 1 year. The Spearman correlation coefficients of MES and MVP with histological healing and recurrence were calculated. The receiver operator characteristic (ROC) curve was plotted and the area under curve (AUC) was applied to evaluate the accuracy of white light and NBI endoscopy for predicting histological healing of UC in clinical remission.Results:According to the MVP criteria, 47 were defined as clear, 63 blurred, and 32 invisible. Spearman correlation analysis showed a significant correlation between MVP under NBI and histological healing ( r=0.549, P<0.001) and a moderate correlation between MES under white light and histological healing ( r=0.462, P<0.001). Spearman correlation analysis showed a moderate correlation between MVP under NBI and clinical recurrence ( r=0.451, P<0.001) and a moderate correlation between MES under white light and clinical recurrence ( r=0.352, P<0.001). AUC of NBI for diagnosing histological healing of UC in clinical remission was 0.809 (95% CI: 0.738-0.879), with a sensitivity of 84.6% (77/91) and specificity of 64.7% (33/51), superior to the white light endoscopy, of which AUC, sensitivity and specificity were 0.763 (95% CI: 0.678-0.848), 81.3% (74/91) and 66.7% (34/51). Conclusion:MVP staging under NBI could predict histological healing of UC patients in clinical remission and is superior to white light endoscopy.

A case of amniotic band syndrome after fetal reduction by radiofrequency ablation / 中华围产医学杂志

This article reported a survived case of amniotic band syndrome (ABS) following fetal reduction by radiofrequency ablation. The woman conceived monochorionic diamniotic twin pregnancy spontaneously. Prenatal ultrasound at 24 weeks of gestation indicated twin-twin transfusion syndrome (stage Ⅲ), and radiofrequency ablation for fetal reduction was successfully performed after formal consent. At 28 +6 weeks, ultrasound reexamination revealed significant edema in the left foot of the fetus, with banding around the ankle, as well as the strangulation mark and narrowing rings. Fetal ABS (ⅡB stage) was diagnosed after multidisciplinary consultation. An immediate emergency cesarean section was performed and a live male baby was born. A thin amniotic band could be seen wrapping around the left ankle of the newborn for several rounds, with obvious strangulation marks about 1 cm deep into the skin, and significant edema on the dorsum and sole of the foot, and the submalleolus area. The amniotic band was released at once, and the edema faded gradually after surgery. After a follow-up of 28 days, the lower limbs of the newborn became normal.

A Case of Tricuspid Valve Repair with a Flexible Band in a Patient with Situs Inversus Totalis / 日本心臓血管外科学会雑誌

Tricuspid annulus has an asymmetric three-dimensional structure with the posteroseptalportion lowest toward the apex from the right atrium and the anteroseptal portion the highest. The tricuspid annulus of a patient with situs inversus has a mirror image of a patient with situs solitus, and the posteroseptal and the anteroseptal portion remains the lowest and the highest toward the apex, respectively, as the situs solitus. Therefore, we assumed that the posteroseptal portion would become higher and the anteroseptal portion would become lower using a conventional three-dimensional rigid ring turned over for tricuspid regurgitation in the situs inversus, and the coaptation of the three leaflets would be poor. In this case, we performed tricuspid annuloplasty using a tricuspid flexible band, mitral valve plasty, left atrial plication, left atrial appendage closure for a situs inversus dextrocardia patient with tricuspid regurgitation, mitral regurgitation, and chronic atrial fibrillation.

Characteristics performance of laryngopharyngeal reflux in narrow band imaging / 临床耳鼻咽喉头颈外科杂志

Objective:To study the application value of narrow-band imaging in the diagnosis of laryngopharyngeal reflux. Methods:A total of 275 patients admitted to the inpatient department or laryngoscopy room of the Otolaryngology Head and Neck Surgery Department of the First Affiliated Hospital of Harbin Medical University from September 2022 to April 2023 due to throat discomfort were selected as the research subjects. All of them completed RSI, RFS scoring scales and electronic laryngoscopy（including ordinary white light and NBI）. According to the expert consensus of LPRD in 2022, RSI and RFS scoring scale were used as diagnostic criteria to divide them into LPR group and non-LPR group. Chi-square test was used to analyze the differences of positive rates of characteristic manifestations under NBI among different groups. The consistency of NBI and scale diagnostic methods was analyzed by Kappa, and RSI and RFS scoring were used as diagnostic criteria, The diagnostic efficiency of NBI method was analyzed. Results:There were 190 people in the LPR group, 157 of whom showed characteristic performance under the NBI mode, with a positive rate of 82.6%（157/190）; there were 85 people in the non-LPR group, with a positive rate of 18.8%（16/85）. There was a statistically significant difference in the positive rate between the two groups（χ²=102.47, P<0.05）. The consistency rate between RSI, RFS and NBI was 82.2%（226/275）. Kappa consistency analysis was used, and Kappa=0.605（P<0.05）, indicating good consistency between the two diagnostic methods. Using RSI and RFS as diagnostic criteria for LPR, the sensitivity of NBI diagnostic method was 82.6%（157/190）, specificity 81.2%（69/85）, positive predictive value 90.8%（157/173） and negative predictive value 67.6%（69/102）. Conclusion:Narrow-band imaging, as a new endoscopic imaging technique, can show small changes in mucosal surface micro vessels and play an important role in the diagnosis of laryngopharyngeal reflux.

Research progress of lower limb muscle strength training in the treatment of lliotibial band syndrome / 中国骨伤

Iliotibial band syndrome (ITBS), as an overused injury of the lower extremities, has developed into a common cause of lateral knee pain. At present, the treatment of ITBS includes drug therapy, muscle strength training, physical therapy, and surgical treatment. Among these methods, physical therapy, drug therapy, and surgical treatment can only alleviate the symptoms of patients. As a safe and effective treatment, lower limb muscle strength training can improve patients' muscle strength, correct abnormal gait, and reduce the recurrence rate of the disease by paying attention to the dynamic changes of patients' recovery process. At present, the pathogenesis of ITBS remains unclear, and the treatment methods are not unified. It is necessary to further study the biomechanical factors related to the lower extremities and develop more scientific and comprehensive muscle strength training methods.

Intra-Aortic Intimal Band Treated as a Chronic Type A Aortic Dissection / 日本心臓血管外科学会雑誌

We present a case of a 76-year-old woman who was diagnosed with sarcoidosis due to enlarged hilar lymph nodes 6 year earlier. Computed tomography (CT) revealed asymptomatic Stanford type A dissection at that time. A chest radiograph taken a year ago showed obvious cardiac enlargement; therefore, echocardiography was performed for further investigation, which revealed severe aortic regurgitation. The patient was referred to our department for surgery after the contrast-enhanced CT revealed the same intra-aortic intimal flap as before. Transthoracic echocardiography showed cardiac enlargement with a left ventricular end-diastolic diameter of 61 mm and aortic regurgitation of 3/4 degree. Contrast-enhanced CT showed an approximately 3-mm-wide band-like structure (linear shadow) that appeared to be the intima of the ascending aorta; however, no entry or false lumen was apparent. The structure in the ascending aorta had an appearance distinct from that of a typical aortic dissection, but was deemed possible in chronic aortic dissection. Nevertheless, intraoperative findings revealed that the linear shadow shown on CT was not due to dissection. The band-like structure was actually the intima, and it was excised. The aortic valve was replaced with a biological valve and the ascending aorta was replaced with a prosthetic graft. She was discharged home on the 11th postoperative day after a favorable recovery. Pathological findings of the band-like structure revealed the intima of the blood vessel and no evidence of inflammatory cell infiltration. There was no evidence of aortic dissection. We encountered a rare case of intra-aortic intimal band that was misdiagnosed and treated as an aortic pseudodissection. It is difficult to rule out aortic dissection prior to surgery; therefore, it is preferable to prepare the operation as a dissection.

Comparison of the efficacy of three types of Kirschner wire tension bands for ulnar olecranal fracture / 中国骨伤

OBJECTIVE@#To compare the clinical effect of three types of Kirschner wire tension band for olecranon fracture.@*METHODS@#The clinical data of 64 patients with olecranon fracture treated by Kirschner wire tension band fixation from March 2016 to May 2020 were retrospectively analyzed. Among them, 19 patients were treated with intramedullary K-wires fixation(group A) including 8 males and 11 females with an average of (48.2±18.3) years old, 3 patients were typeⅠ, and 16 patients were typeⅡ according to Mayo classification;20 patients were treated with transcortical K-wires fixation (group B) including 13 males and 7 females with an average of (43.5±20.4) years old, 3 patients were typeⅠand 17 patients were typeⅡ according to Mayo classification;25 patients were treated with perforated Kirschner wire(group C) including 15 males and 10 females with an average of (55.2±17.5) years old, 4 patients were typeⅠand 21 patients were typeⅡ according to Mayo classification. The operative time, intraoperative blood loss, times of Intraoperative fluoroscopy, fracture healing time and complications of 3 groups were compared. At the final follow-up, elbow function was assessed using the Mayo Elbow Function Scale.@*RESULTS@#There were differences in operative time, intraoperative fluoroscopy times, postoperative VAS and soft tissue irritation among the three groups(P<0.05). The operative time, intraoperative fluoroscopy times in group A and C was better than that in group B. The postoperative VAS score, skin irritability in group C was better than that of group B. The difference was statistically significant on Mayo elbow function score at the final follow-up among three groups(P<0.05), the scores of group A and C were higher than that of group B.@*CONCLUSION@#Compared with transcortical K-wires screw fixation, both intramedullary K-wires screw fixation and perforated Kirschner wire fixation, which can significantly reduce the occurrence of soft tissue irritation, reduce surgical complications and shorten the operation time.

A review on synthesis of quantum dots and their biomedical applications

Quantum Dots (QDs) are ultra-fine nanometer-sized semiconductor particles with a core-shell structure possess both electrical and optical properties. Their unique ability to emit pure, monochromatic light on being exposed to light makes them extremely versatile in their applications. The color of the light emitted directly depends on their size and shape. Smaller QDs emit shorter wavelengths, closer to the violet end of the visible light spectrum (~380-450 nm), while larger QDs emit longer wavelengths i.e in reddish spectrum (~620-750 nm). Owing to their “tunability”, QDs can be exploited in a wide range of fluorescent, photonic, and electrochemical applications. QDs represent elements mainly from Group II-VI (e.g., CdSe) or Group III-V (e.g., InP) with the resultant optical and electronic properties of the quantum dots being somewhere between bulk semiconductor material and individual atoms or molecules. Besides applications in energy and photonics, they are under extensive investigation and development for use in disease diagnosis and therapy, specifically in the area of controlled drug delivery, biosensing and imaging. This review surveys the progress of research explores their properties, synthesis, applications, delivery systems in biology, and their toxicity

Efficacy of non-invasive diagnostic methods in the diagnosis and screening of oral cancer and precancer / Eficácia de métodos diagnósticos não invasivos no diagnóstico e triagem de lesões pré-malignas e malignas na cavidade oral; revisão sistemática e meta-análise

Abstract Introduction: Traditional meta-analyses on the diagnostic accuracy of oral lesions have been conducted, but they were inherently limited to direct pairwise comparisons between a single method and a single alternative, while multiple diagnostic options and the ranking thereof were methodologically not possible. Objective: To evaluate the diagnostic values of various methods in patients with oral potential malignant disease by performing a network meta-analysis. Methods: Two authors independently searched the databases (MEDLINE, SCOPUS, the Cochrane Register of Controlled Trials, and Google scholar) up to June 2020 for studies comparing the diagnostic accuracy of various tools (autofluorescence, chemiluminescence, cytology, narrow band imaging, and toluidine blue) with visual examination or other tools. The outcomes of interest for this analysis were sensitivity, specificity, negative predictive value, positive predictive value and accuracy. Both a standard pairwise meta-analysis and network meta-analysis were conducted. Results: Treatment networks consisting of six interventions were defined for the network metaanalysis. The results of traditional meta-analysis showed that, among six methods, narrow band imaging showed higher sensitivity, specificity, negative predictive value, positive predictive value, and accuracy compared to visual examination. The results of network meta-analysis showed that autofluorescence, chemiluminescence, and narrow band imaging had higher sensitivity compared with visual examination, and that chemiluminescence and narrow band imaging had higher negative predictive value compared with visual examination. However, autofluorescence and chemiluminescence had lower specificity compared with visual examination. There were no significant differences in positive predictive value and accuracy among the six interventions. Conclusion: This study demonstrated that narrow banding imaging has superiority in terms of sensitivity and negative predictive value compared with the other five tested agents.

Resumo Introdução: Metanálises tradicionais sobre a precisão diagnóstica de lesões orais têm sido conduzidas, mas são inerentemente limitadas a comparações pareadas diretas entre um único método e uma única opção, enquanto múltiplas opções de diagnóstico e suas classificações ainda não foram metodologicamente possíveis. Objetivo: Avaliar os valores diagnósticos de vários métodos em pacientes com doença oral potencialmente maligna e fazer uma metanálise de rede. Método: Dois autores pesquisaram independentemente os bancos de dados (Medline, Scopus, Cochrane Register of Controlled Trials e Google Scholar) até junho de 2020 para estudos que comparassem a precisão diagnóstica de várias ferramentas (autofluorescência, quimioluminescência, citologia, imagem de banda estreita e cloreto de tolônio) com exame visual ou outras ferramentas. Os resultados de interesse para esta análise foram sensibilidade, especificidade, valor preditivo negativo, valor preditivo e precisão. Tanto uma metanálise pareada padrão quanto uma metanálise de rede foram conduzidas. Resultados: Redes de tratamento compostas por seis intervenções foram definidas para a metanálise de rede. Os resultados da metanálise tradicional mostraram que, entre seis métodos, a imagem de banda estreita apresentou maior sensibilidade, especificidade, valor preditivo negativo, valor preditivo e precisão em comparação ao exame visual. Os resultados da metanálise de rede mostraram que a autofluorescência, a quimioluminescência e a imagem de banda estreita obtiveram maior sensibilidade em comparação com o exame visual e que a quimioluminescência e a imagem de banda estreita apresentaram maior valor preditivo negativo em comparação com o exame visual. Entretanto, a autofluorescência e a quimioluminescência mostraram especificidade inferior em comparação com o exame visual. Não houve diferenças significativas no valor preditivo e na precisão entre as seis intervenções. Conclusão: Este estudo demonstrou que a imagem de banda estreita demonstra superioridade em termos de sensibilidade e valor preditivo negativo em comparação com os outros cinco agentes testados.

Cirugía fetoscópica en síndrome de banda amniótica: comunicación del primer caso exitoso en el Perú con correlación posnatal a los 6 y 12 meses de vida

El síndrome de banda amniótica (SBA) o complejo de disrupción de banda amniótica es aquella malformación congénita que ocurre como consecuencia de bridas amnióticas de etiología heterogénea, patogénesis que involucra una serie de manifestaciones clínicas fetales, tales como constricción, amputación y múltiples defectos craneofaciales, viscerales y de la pared del cuerpo. La prevalencia estimada de SBA oscila entre 1:15,000 y 1:1,200 nacidos vivos. Afecta a ambos sexos por igual. El diagnóstico prenatal puede sospecharse tan pronto como el primer trimestre tardío, cuando las imágenes por ultrasonido detectan anillos de constricción, amputaciones de extremidades y/o defectos craneofaciales. La terapia prenatal puede ofrecer una alternativa de tratamiento con la liberación de anillos de constricción bajo fetoscopia en aquellos fetos que se verían beneficiados con el procedimiento.

Amniotic band syndrome (ABS) or amniotic band disruption complex is a congenital malformation that occurs because of amniotic flanges of heterogeneous etiology, a pathogenesis that involves a series of fetal clinical manifestations, such as constriction, amputation, and multiple craniofacial, visceral and wall defects. The estimated prevalence of ABS ranges from 1:15.000 to 1:1.200 liveborn. It affects both sexes equally. Prenatal diagnosis may be suspected as early as the late first trimester when ultrasound imaging detects constriction rings, limb amputations and/or craniofacial defects. Prenatal therapy may offer an alternative treatment with release of constriction rings through fetoscopy in those fetuses that would benefit from the procedure.

Clinical profile and demographic distribution of band shaped keratopathy in India: A study of 8801 patients

Purpose: To describe the clinical profile and demographic distribution of band?shaped keratopathy (BSK) in patients presenting to a multitier ophthalmology hospital network in India. Methods: This cross?sectional hospital?based study included 2,664,906 new patients presenting between January 2011 and January 2021 (10?year period). Patients with a clinical diagnosis of BSK in at least one eye were included as cases. The data were collected using an electronic medical record system. Results: Overall, 8801 (0.33%) patients were diagnosed with BSK. The prevalence rates were 0.47% in children (age: <16 years) and 0.31% in adults. The majority of patients were males (62.87%) with unilateral affliction (85.21%). The mean age of the patients was 40.43 ± 23.14 years. The majority (16.93%) of the patients were in the age bracket of 11–20 years. A larger proportion of the patients were from higher socioeconomic status (60.46%) and the urban region (45.9%). Of the 10,103 eyes affected with BSK, the common ocular comorbidities were status post?vitreoretinal surgery (20.55%) and uveitis (12.7%) in children and corneal scar (41.23%) and spheroidal degeneration (13.7%) in adults. Most of the eyes had mild or no visual impairment (24.74%). Among the eyes that needed surgical intervention, chelation with ethylenediaminetetraacetic acid (EDTA) was the most performed surgical procedure (1.68%) along with phototherapeutic keratectomy (0.32%). Conclusion: BSK commonly affects adult males and is unilateral in nature. The majority of the patients in this cohort belonged to higher socioeconomic strata and urban geography. At initial presentation, visual impairment was mild to moderate in a vast majority of the patients, and the most common surgical intervention performed was chelation with EDTA during the study period.

Pigmented transverse nasal band: A review

Pigmented transverse nasal band/groove is an asymptomatic benign condition, characterized by the development of erythematous to hyperpigmented, well-demarcated, transverse groove at the junction of middle and lower two-third of the nasal dorsum. Although the pathogenesis is unclear, embryologic origin seems to be the most plausible hypothesis. This condition is often associated other related dermatological conditions such as milia, comedones, seborrheic dermatitis and atopic dermatitis. Diagnosis is mostly clinical, while reassurance is the mainstay of therapy. In persistent cases, topical retinoids have been used. In this article, we have reviewed the different aspects of this condition including treatment, along with the recent updates to create awareness about this dermatological entity

Diagnostic Accuracy of the Japan Narrow-Band Imaging Expert Team (Jnet) Classification System for the Differential Diagnosis of Colorectal Polyps

Background: Real time visual differentiation of colorectal polyps into benign and malignant helps to decide the appropriate treatment strategy and avoid the unnecessary risk associated with endoscopic therapies and need for repeat procedures. The Japan NBI Expert Team (JNET) classification developed in 2014 classifies colorectal polyps into types 1(Hyperplastic polyps including sessile serrated polyps), 2A (low grade dysplasia), 2B (high grade dysplasia/ superficial submucosal invasive carcinomas) and 3 (deep submucosal invasive carcinomas). We conducted this study to evaluate the diagnostic accuracy of the JNET classification for colorectal polyps. Methods: All patients undergoing colonoscopy in a tertiary care Centre in south India from February to July 2020, who had colorectal polyps were included in the study. A prospective image evaluation to identify the JNET class was done by 2 independent observers blinded to the histological diagnosis and the result was compared with the final histopathological diagnosis. Inflammatory polyps were excluded. The collected data was statistically analyzed to assess the diagnostic accuracy. Result: 139 polyps from 102 patients were included in the study. Most common locations were ascending colon (31%) or rectosigmoid (30.3%). 21 polyps were hyperplastic polyps, 78 polyps were LGD, 23 were HGD/SM-S and 17 were SM-D polyps. On NBI imaging, 23, 76, 30, and 10 polyps were classified as JNET types 1, 2a, 2b and 3 respectively. The diagnostic accuracy of JNET classification was 98.5%, 88.4%, 83% and 93.5% respectively. Conclusion: The JNET classification has a high diagnostic accuracy for predicting the histology of colorectal polyps and hence recommended.

Cannulated screws with sutures for treatment of transverse patellar fractures / 中华创伤骨科杂志

Objective:To evaluate the clinical efficacy of cannulated screws with sutures in the treatment of patellar transverse fractures.Methods:A retrospective analysis was performed of the data of 70 patients with patellar transverse fracture who had been admitted to Senior Department of Orthopedics, The Fourth Medical Center of Chinese PLA General Hospital from January 2017 to March 2021. According to the construction methods for the tension band, the patients were divided into 3 groups. In group A of 21 cases subjected to fixation with cannulated screws with sutures (Fiber-Tape), there were 8 males and 13 females with a median age of 55.0 (48.0, 65.0) years; in group B of 32 cases subjected to fixation with Kirschner wire tension band, there were 15 males and 17 females with a median age of 52.5 (41.5, 63.0) years; in group C of 17 cases subjected to fixation with Cable-Pin system, there were 5 males and 12 females with a median age of 55.0 (37.0, 65.0) years. The 3 groups were compared in terms of complications, secondary surgery (removal of internal fixation), operation time, intraoperative blood loss and knee function rated by the Lysholm and B?stman scores at the last follow-up.Results:There were no significant differences in the preoperative general data between the 3 groups, showing they were comparable ( P > 0.05). There was no significant difference in the operation time, intraoperative blood transfusion or follow-up time among the 3 groups ( P > 0.05). The incidence of soft tissue irritation [4.8% (1/21)] and the secondary operation rate [4.8% (1/21)] in group A were significantly lower than those in group B [43.8% (14/32) and 37.5% (12/32)] and group C [41.2% (7/17) and 35.3% (6/17)] ( P < 0.05), but there was no statistically significant difference between group B and group C ( P > 0.05). In groups A, B and C, respectively, the Lysholm knee score was 84.0 (69.0, 88.0), 89.0 (71.5, 95.0) and 82.0 (63.0, 90.0), and the B?stman knee score 26.0 (23.0, 28.0), 26.5 (24.0, 27.5) and 26.0 (22.0, 28.0), showing no significant difference ( P > 0.05). There was no significant difference either in the incidence of other complications among the 3 groups ( P > 0.05). Conclusion:In the treatment of patellar transverse fractures, compared with the Kirschner wire tension band and Cable-Pin system, cannulated screws with sutures (Fiber-Tape) may lead to a lower incidence of soft tissue irritation and a lower rate of secondary surgery, but no significant differences in operation time, intraoperative blood loss, other complications or postoperative functional scores.

How phosphorylation of RBCs band 3 protein affects storage quality of suspended red blood cells prepared from Tibetan high Hb population / 中国输血杂志

【Objective】 To investigate the quality changes of suspended red blood cells (SRBCs) prepared from the blood of Tibetan high Hb population, and explore the availability and safety of blood collected from Tibetan high Hb population. 【Methods】 The voluntary blood donors were grouped according to the Hb concentration at the initial screening: female blood donors from Tibet Autonomous Region (>3 500 m) with Hb≥190 g/L and male blood donors with Hb≥210 g/L were classified as plateau high hemoglobin group. A total of 13 male blood donors from Tibet Autonomous Region were recruited. And the female blood donors (n=13) with Hb(115~165) g/L and male blood donors (n=12) with Hb(120~185) g/L from Chengdu were classified as control group. Whole blood of 200 mL specification was centrifuged to remove the plasma, and MAP additive solution was added to prepare SRBCs, then SRBCs were divided into four aliquots (50 mL/bag and stored at 4℃. Parameters as blood routine, free Hb and hemolysis rate were measured aseptically at day 1, 14, 21, 35 of storage. And 10 mL SRBCs was used to extract membrane proteins for tyrosine phosphorylation detection of band 3 protein. 【Results】 The RBCs counts(×1012/L), hematocrit(%) and hemoglobin(g/L) of Tibetan high Hb group and control group were 6.76±0.95 vs 4.65±0.52, 63.3±6.8 vs 43.1±4.4 and 214.4±19.8 vs 143.2±16.9 (P<0.01). The erythrocyte deformability test on the day 1, 14, 21, 35 of storage showed that the deformability of SRBCs prepared from Tibetan high Hb group was significantly lower than that of the control group under shear stress of 3, 5.33, 9.49, 16.87, and 30 Pa, while the hemolysis rate of SRBCs prepared from the Tibetan high Hb group and the control group on the day 1, 14, 21, 35 were 0.050 2±0.040 2 vs 0.022 2±0.011 1, 0.055 4±0.043 vs 0.032 1±0.028 7, 0.061 2±0.025 9 vs 0.034 3±0.031 7 and 0.069 6±0.032 0 vs 0.044 0±0.033 3 (P<0.05). Western blotting showed that the cytoplasmic N-terminal Y21 of band 3 protein of SRBCs prepared from Tibetan high Hb group was highly phosphorylated. 【Conclusion】 The deformability of SRBCs prepared from the Tibetan high Hb group was significantly lower while the hemolysis rate of SRBCs was higher than that of the control group. The hemolysis rate of the SRBCs at the end of storage prepared from the Tibetan high Hb group meets the requirements of the national standard GB18469-2012(<0.8%). The increase of hemolysis rate of SRBCs prepared from the Tibetan high Hb group was closely related to the phosphorylation of band 3 protein.

HIV prevalence and Western blot analysis of voluntary blood donors in Wuhu area / 中国输血杂志

【Objective】 To investigate the confirmatory status of HIV-1 antibody detection and Western blot (WB) test among voluntary blood donors in Wuhu, and to explore the strategies and methods to further ensure blood quality and safety. 【Methods】 Blood samples were preliminarily screened by ELISA and NAT, and the reactive samples were sent to Wuhu CDC for further WB test of HIV-1 antibody. The confirmation results of HIV-1 antibodies of voluntary blood donors in Wuhu in the past 10 years were retrospectively collected. The characteristics of WB bands of positive samples were analyzed, and the demographic characteristics of HIV-infected voluntary blood donors were sorted out. 【Results】 A total of 354 864 blood samples from voluntary blood donors in Wuhu during January 2011 to May 2021 were investigated, among which 42 were confirmed HIV positive (HIV-1 antibody positive in 41, and solo HIV-RNA reactive in 1), with a total HIV positive rate of 11.8/100 000(42/354 864). Statistical differences were found in gender [males 97.6% (41/42) vs females 2.4% (1/42)], marital status [unmarried 17.3/100 000 vs married 8.0/100 000] and occupation [staff/workers 37.5/100 000 vs students11.4/100 000 vs others 7.7/100 000]. Among the positive samples, the yield rate of WB bands gp160 was 100% (41/41), both gp41 and p24 were 97.6% (40/41),, and p55 was the lowest 46.3% (19/41). P51 and P66 presented the highest yield consistency (Kappa=1.000, P5 000 cps/mL by viral load (VL) testing, indicating HIV window period infection. 【Conclusion】 HIV infection statistically affected male donors more than females in Wuhu area, and most were early infection that revealed by WB band analysis. NAT plays an important role in the detection and confirmation of HIV infection during the window period, and is essential for blood safety.