Objective: Some regions in China have lowered the minimum interval for whole blood donation to 3 months through local regulations: Hainan, effective from March 1, 2012, allows men to donate at intervals of≥3 months and women at intervals of≥4 months; Shenzhen, effective from November 1, 1995, allows whole blood donation at intervals of≥3 months. The aim of this study was to evaluate the impact of shortening the whole blood donation interval on blood donation adverse reactions and donation behavior, thereby providing scientific evidence for policy evaluation and revision of relevant regulations. Methods: This was a multicenter, retrospective cohort study based on blood donation registry data from Shenzhen and Hainan. Data were obtained from the blood information management systems of Hainan Province (1991-2025) and Shenzhen City (2018-2024). Eligible participants were donors aged 18-65 years who had donated whole blood at least twice and met health eligibility criteria. The exposure was defined as a shorter donation interval (whole-blood interval≥3 months and<6 months) and was treated as a time-varying variable. The primary outcome was blood donation adverse reactions. Negative binomial regression with person-years as an offset was used to estimate incidence rate ratios for adverse reactions. Marginal standardization was used to estimate the adjusted incidence rate difference, and donor-level bootstrap resampling was used to estimate the 95% confidence interval of the adjusted incidence rate difference. Non-inferiority was assessed by comparing the upper limit of the 95% confidence interval with the prespecified non-inferiority margin of Δ=0.00 070 per person-year. In addition, Andersen-Gill models were used to analyze adverse reaction-free probability for recurrent events. Secondary outcomes were donation behavior, including annual repeat donation rate, annual donation frequency, mean donation interval, and annual whole-blood donation volume. These were analyzed using logistic regression, negative binomial regression, and linear regression models, respectively, with adjustment for age, sex, region, and donation site. This study was approved by the Ethics Committee of the Institute of Blood Transfusion, Chinese Academy of Medical Sciences (Approval No.2025011) and registered in the Chinese Clinical Trial Registry (ChiCTR2500114968). Results: A total of 375 075 repeat whole-blood donors were included, contributing 1 292 748 whole-blood donations. Among them, 119 993 had ever donated at a shorter interval and 255 082 had never done so. Over 1 281 842 person-years of follow-up in the dynamic cohort, 2 100 blood donation adverse reactions were recorded. The incidence rates of adverse reactions were 1.76 and 1.58 per 1 000 person-years in the ever-short interval and never-short interval groups, respectively. After adjustment for age, sex, province, and donation site, the ever-short interval group had a slightly higher adverse reaction rate than the never-short interval group (IRR=1.28, 95%CI: 1.15-1.41, P<0.001). Marginal standardization showed that the adjusted incidence rates were 1.73 and 2.21 per 1 000 person-years in the never-short interval and ever-short interval groups, respectively. The adjusted incidence rate difference was 0.000 48 per person-year, with a bootstrap 95%CI of 0.000 26-0.000 69 per person-year; the upper limit of the 95%CI was below the prespecified non-inferiority margin. Andersen-Gill recurrent-event analysis showed that the ever-short interval group had a higher probability of remaining adverse reaction-free. Analysis of donation behavior showed that among donors followed for at least 365 days, the ever-short interval group had a higher annual repeat donation rate than the never-short interval group (74.2% vs 18.3%; adjusted OR=12.5, 95%CI: 12.3-12.7, P<0.001). They also had a higher annual whole-blood donation rate (adjusted RR=1.98, 95%CI: 1.97-1.98, P<0.001), a shorter mean whole-blood donation interval (β=-239 days, 95%CI: -242 to -237 days, P<0.001), and a higher annual whole-blood donation volume (adjusted RR=2.14, 95%CI: 2.13-2.15, P<0.001). Conclusion: Based on real-world data from repeat whole-blood donors in Shenzhen and Hainan, lowering the minimum whole blood donation interval to 3 months did not show an absolute increase in blood donation adverse reactions exceeding the prespecified margin within the scope of this outcome. Shorter whole-blood donation interval behavior was also associated with greater repeat-donation activity, higher annual donation frequency, and higher annual whole-blood donation volume. Given the observational nature of this study and the lack of long-term donor health indicators such as iron status and longitudinal hemoglobin changes, the long-term safety of setting the minimum whole blood donation interval at 3 months requires further evaluation.

Objective:To explore the value of ultrasound features modified version 2022 of the Ovarian-Adnexal Imaging Reporting and Data System（O-RADS）Category 4 in the differential diagnosis of benign and malignant ovarian-adnexal tumors.Methods:Retrospective analysis was conducted in 501 cases with ovarian masses classified into 4 categories according to the 2022 version of O-RADS who were collected from 4 clinical centers［the Second Afliated Hospital of Harbin Medical University（188 cases），Zhejiang Provincial People's Hospital（146 cases），Sichuan Provincial Maternity and Child Health Care Hospital（90 cases），and Fuling Hospital of Chongqing University（77 cases）］from January 2018 to July 2024 with concomitant surgical resection.The 424 cases from 3 of the clinical centers（the Second Hospital of Harbin Medical University，Zhejiang Provincial People's Hospital，and Sichuan Maternal and Child Health Hospital）were randomly divided into a training group（339 cases）and an internal validation group（85 cases）according to an 8∶2 randomization，while the cases from the other clinical center（Fuling Hospital of Chongqing University）were selected as the external validation group（77 cases），and the pathological diagnosis was used as the “gold standard”.Univariate and multifactorial logistic regression analyses were performed on the ultrasound characteristics of the training group to screen the independent predictors associated with ovarian carcinogenesis，and to formulate the stratification rules for the 4 types of masses in O-RADS. The ROC curve of this stratification method was plotted and the area under the curve（AUC）was calculated，and it was validated in the internal validation group and the external validation group；and the diagnostic accuracy was compared with that of the 2022 version of O-RADS.Results:Univariate logistic analysis showed that cysts with solid components，≥ 4 papillary projections，smooth inner wall of the cyst，color flow score ≥ 3 points，and acoustic shadowing were independent predictors of ovarian cancer（all P < 0.05）；while multifactorial logistic analysis showed that cysts with a solid component and a color flow score ≥3 points were independent risk factors of ovarian cancer（all P < 0.05），and smooth cyst walls and acoustic shadows were independent protective factors（all P < 0.05）.The diagnostic accuracies of the modified training group，internal validation group，and external validation group were 73.7%，68.2%，70.1%，respectively，which were significantly higher than the diagnostic accuracies of the 2022 version of the O-RADS（38.9%，37.6%，33.8%）（all P < 0.05）.The diagnostic sensitivity，specificity and AUC of the training group were 0.871，0.652，0.762，respectively，while the internal validation group were 0.844，0.585，0.714，and 0.846，0.627，0.737 in the external validation group. Conclusions:Improvement of the 2022 version of O-RADS category 4 using ultrasound features may improve the identification of benign and malignant ovarian-adnexal tumors.

Objective:To investigate the clinical features of adherent perirenal fat (APF) in patients undergoing laparoscopic adrenal surgery through peritoneal approach, and to analyze its predictors and risk factors, so as to provide reference for clinical diagnosis and treatment.Methods:A total of 86 patients who received transabdominal approach laparoscopic adrenal surgery in the Department of Urology, the Rizhao Hospital of Traditional Chinese Medicine and the First Department of Minimally invasive Urology of Shandong Provincial Hospital from February 2021 to February 2024 were retrospectively selected as the study objects. According to whether patients developed APF during the operation, they were divided into APF group (29 cases) and non-APF group (57 cases). The Mayo Adhesive Probability (MAP) score and preoperative perirenal fat CT density were compared between the two groups. Receiver operating characteristic (ROC) curve was used to analyze the value of each index in predicting the occurrence of APF. Univariate and multivariate logistic regression models were used to analyze the influencing factors of the occurrence of APF.Results:The MAP score, CT density of perirenal fat (renal vein level, adrenal tumor level, normal adrenal gland level) and CT density score of the APF group were higher than those of the non-APF group, with statistical significance (all P<0.05). Age, body mass index (BMI), perirenal fat thickness and the proportion of diabetes mellitus and hyperlipidemia in the APF group were significantly higher than those in the non-APF group, with statistical significance (all P<0.05). The area under ROC curve predicted by MAP score, CT density of perirenal fat (renal vein level, adrenal tumor level, normal adrenal level) and CT density score for APF in patients undergoing laparoscopic adrenal surgery were 0.921, 0.655, 0.628, 0.538, and 0.912, respectively. Logistic regression model results showed that high MAP score, high CT density score, old age, high BMI, large perirenal fat thickness, and complicated diabetes were independent risk factors for APF in patients undergoing peritoneal laparoscopic adrenal surgery (all P<0.05). Conclusions:In patients with adrenal tumor treated by peritoneal laparoscopic adrenal surgery, MAP score and CT perirenal fat density examination before operation are beneficial to predict whether APF will occur, which has certain guiding significance for the formulation of surgical plan.

Objective:To explore the value of ultrasound features modified version 2022 of the Ovarian-Adnexal Imaging Reporting and Data System（O-RADS）Category 4 in the differential diagnosis of benign and malignant ovarian-adnexal tumors.Methods:Retrospective analysis was conducted in 501 cases with ovarian masses classified into 4 categories according to the 2022 version of O-RADS who were collected from 4 clinical centers［the Second Afliated Hospital of Harbin Medical University（188 cases），Zhejiang Provincial People's Hospital（146 cases），Sichuan Provincial Maternity and Child Health Care Hospital（90 cases），and Fuling Hospital of Chongqing University（77 cases）］from January 2018 to July 2024 with concomitant surgical resection.The 424 cases from 3 of the clinical centers（the Second Hospital of Harbin Medical University，Zhejiang Provincial People's Hospital，and Sichuan Maternal and Child Health Hospital）were randomly divided into a training group（339 cases）and an internal validation group（85 cases）according to an 8∶2 randomization，while the cases from the other clinical center（Fuling Hospital of Chongqing University）were selected as the external validation group（77 cases），and the pathological diagnosis was used as the “gold standard”.Univariate and multifactorial logistic regression analyses were performed on the ultrasound characteristics of the training group to screen the independent predictors associated with ovarian carcinogenesis，and to formulate the stratification rules for the 4 types of masses in O-RADS. The ROC curve of this stratification method was plotted and the area under the curve（AUC）was calculated，and it was validated in the internal validation group and the external validation group；and the diagnostic accuracy was compared with that of the 2022 version of O-RADS.Results:Univariate logistic analysis showed that cysts with solid components，≥ 4 papillary projections，smooth inner wall of the cyst，color flow score ≥ 3 points，and acoustic shadowing were independent predictors of ovarian cancer（all P < 0.05）；while multifactorial logistic analysis showed that cysts with a solid component and a color flow score ≥3 points were independent risk factors of ovarian cancer（all P < 0.05），and smooth cyst walls and acoustic shadows were independent protective factors（all P < 0.05）.The diagnostic accuracies of the modified training group，internal validation group，and external validation group were 73.7%，68.2%，70.1%，respectively，which were significantly higher than the diagnostic accuracies of the 2022 version of the O-RADS（38.9%，37.6%，33.8%）（all P < 0.05）.The diagnostic sensitivity，specificity and AUC of the training group were 0.871，0.652，0.762，respectively，while the internal validation group were 0.844，0.585，0.714，and 0.846，0.627，0.737 in the external validation group. Conclusions:Improvement of the 2022 version of O-RADS category 4 using ultrasound features may improve the identification of benign and malignant ovarian-adnexal tumors.

Objective:To investigate the clinical features of adherent perirenal fat (APF) in patients undergoing laparoscopic adrenal surgery through peritoneal approach, and to analyze its predictors and risk factors, so as to provide reference for clinical diagnosis and treatment.Methods:A total of 86 patients who received transabdominal approach laparoscopic adrenal surgery in the Department of Urology, the Rizhao Hospital of Traditional Chinese Medicine and the First Department of Minimally invasive Urology of Shandong Provincial Hospital from February 2021 to February 2024 were retrospectively selected as the study objects. According to whether patients developed APF during the operation, they were divided into APF group (29 cases) and non-APF group (57 cases). The Mayo Adhesive Probability (MAP) score and preoperative perirenal fat CT density were compared between the two groups. Receiver operating characteristic (ROC) curve was used to analyze the value of each index in predicting the occurrence of APF. Univariate and multivariate logistic regression models were used to analyze the influencing factors of the occurrence of APF.Results:The MAP score, CT density of perirenal fat (renal vein level, adrenal tumor level, normal adrenal gland level) and CT density score of the APF group were higher than those of the non-APF group, with statistical significance (all P<0.05). Age, body mass index (BMI), perirenal fat thickness and the proportion of diabetes mellitus and hyperlipidemia in the APF group were significantly higher than those in the non-APF group, with statistical significance (all P<0.05). The area under ROC curve predicted by MAP score, CT density of perirenal fat (renal vein level, adrenal tumor level, normal adrenal level) and CT density score for APF in patients undergoing laparoscopic adrenal surgery were 0.921, 0.655, 0.628, 0.538, and 0.912, respectively. Logistic regression model results showed that high MAP score, high CT density score, old age, high BMI, large perirenal fat thickness, and complicated diabetes were independent risk factors for APF in patients undergoing peritoneal laparoscopic adrenal surgery (all P<0.05). Conclusions:In patients with adrenal tumor treated by peritoneal laparoscopic adrenal surgery, MAP score and CT perirenal fat density examination before operation are beneficial to predict whether APF will occur, which has certain guiding significance for the formulation of surgical plan.

ObjectiveTo analyze the temporal trend of knockdown resistance (kdr) gene mutations highly correlated with pyrethroid resistance in field populations of Aedes aegypti in Jinghong City of Yunnan Province, and to provide a scientific basis for formulating rational insecticide use strategies. MethodsAdult mosquito samples of Aedes aegypti from 2016 to 2023 and larvae mosquito samples from July 2022 to June 2023 were collected in Jinghong City of Yunnan Province. Allele specific PCR (AS-PCR) was used to measure kdr mutations at amino acid positions 989, 1016 and 1534 of the voltage-gated sodium ion channel (VGSC) gene. Data such as mutation rate and mutation allele frequency were calculated, SPSS software was used to perform trend chi square tests on mutation rate and mutation allele frequency with year and month, as well as comparison of mutation allele frequencies and genotype distributions between the dry and rainy seasons, thereby delineating the temporal trend of kdr gene mutations. ResultsAmong the 173 samples collected from 2016 to 2023, the mutation rates of S989P and V1016G were 100.00% for each year, while the mutation rate of F1534C ranged from 62.50% to 100.00%. The mutation rate and mutation allele frequency of F1534C were increased over the years (χ²=22.079, P<0.001; χ²=42.971, P<0.001). Concurrently, the proportion of the PPGGCC genotype was increased annually (χ²=60.790, P<0.001). Among the 288 samples collected from July 2022 to June 2023, the monthly mutation rates for S989P, V1016G, and F1534C were consistently 100.00%. There was only one type of mutation present, namely S989P+V1016G+F1534C. In the combinations of the three genotypes, the SPGGCC genotype accounted for 1.39% (4/288), the PPGGFC accounted for 2.78% (8/288), and the PPGGCC had the highest proportion at 95.83% (276/288). After tesiting the samples collected in August 2023, the mutation rates of 989, 1016 and 1534 sites of VGSC in females, males, and larvae of the same generation were all 100.00%. ConclusionSince 2016, the gene mutations at S989P and V1016G loci in the VGSC gene of wild Aedes aegypti in Jinghong City have remained consistently at 100.00%, while the mutation rate and mutant allele frequency of F1534C have increased year by year during the testing period. By 2023, the mutation rates at three loci in the VGSC gene of Aedes aegypti in Jinghong City had all reached 100.00%, and neither changes in insect developmental stage nor gender differences during transmission exerted a detectable impact on the mutation rates. In the control of Aedes aegypti in Jinghong City, the use of pyrethroid insecticides should be stopped or reduced, and regular monitoring of kdr genes should be carried out to promptly detect new mutations.

Objective To observe the clinical manifestations of elderly patients with acute infectious purpura fulminant(AIPF)and septic shock caused by Streptococcus pyogenes(GAS),analyze the changes in indicators and treatment processes,and provide clinical references for the diagnosis and treatment of such diseases.Methods A retrospective analysis was conducted on the case data,clinical manifestations,signs,examination indexes and treatment process of an elderly patient who presented with GAS-induced AIPF combined with septic shock and was treated by the department of critical care medicine of Qinghai Provincial People's Hospital on June 17th,2021.This study also involved a discussion on the pathophysiological characteristics and treatment measures for these diseases as well as observation of patient prognosis.Results The 80-year-old male patient,who was previously in good health,underwent knee surgery one year ago and was admitted to the hospital on June 17,2021 due to"pain and swelling of the left face with difficulty opening the mouth for the past 2 days".Upon admission,a complete set of laboratory tests including blood routine,blood biochemistry and coagulation function were conducted.A head CT revealed swelling of the masseter muscle on the left side,subcutaneous exudation of the cheek,non-cyanotic space on the left parapharyngeal space,poor display of eustachian tube opening,and narrow throat.Color ultrasound showed soft tissue swelling and interstitial edema in the left maxillofacial region and eyelid.Six hours after admission,the patient gradually developed purple spots,blood scars and necrosis on the right side neck shoulder and upper chest accompanied by tenderness and high fever mainly on his face.The heart rate fluctuated around 150 times per minute while blood pressure was at 108/71 mmHg(1 mmHg≈0.133 kPa,Metaraminol 6.67 μg·kg-1·min-1).The patient was diagnosed with septic shock and transferred to intensive care unit(ICU)for emergency treatment.With timely comprehensive monitoring in place,the patient received active treatment focused on maintaining respiratory circulation stability.After plasma infusion,early wound treatment,reasonable anti-infection measures as well as inflammation clearance,organ function protection,and supportive therapy,the patient eventually recovered from hospitalization without recurrence after 6 months follow-up.Conclusion The onset of acute GAS infection is characterized by its rapid and severe progression,high mortality,and challenging treatment.However,timely and effective refined comprehensive monitoring,evaluation,and treatment can still yield favorable outcomes.

Objective Combined with domestic and foreign guidelines,to explore the individualized treatment strategy of urosepsis,and to provide reference for standardized diagnosis and treatment of urosepsis patient.Methods To analyze the diagnosis and treatment process of a patient with urogenic sepsis who was admitted to the department of critical care medicine of the First Affiliated Hospital of Xi'an Jiaotong University in April 15,2021.During the diagnosis and treatment process,we performed puncture drainage fluid and urine culture as soon as possible to confirm the diagnosis from the perspective of etiology.Considering the possible pathogenic bacteria at the infection site,the drug resistance of pathogenic bacteria in medical units,and drug safety,imipenem and cilastatin was chosen for anti-infective therapy.A two-step approach was used for drug administration based on drug pharmacokinetics/pharmacodynamic(PK/PD)characteristics,and drug concentration monitoring.The patients were followed up after discharge.Results The patient was critically ill on admission and was diagnosed with urosepsis.We optimize the empirical use of antimicrobials based on their PK/PD characteristics.Ultrasound-guided percutaneous nephrostomy of the left renal pelvis was performed to adequately drain the infection.Urine culture returned as extended-spectrum β-lactamase(ESBL)-producing Escherichia coli,confirming the etiological diagnosis.After 7 days of treatment,the patient's condition improved,the antibacterial drugs were downgraded to piperacillin-tazobactam,and the total course of anti-infection was 14 days.The patient was in good condition 2 months after discharge,and underwent left ureteral calculus and lithotripsy in the local hospital,and the left nephrostomy tube was removed.After discharge,the patient's condition was stable,no recurrence was found after 7 months of follow-up,and daily life was not affected.Conclusions Management of infection foci in urosepsis patient is critical.Diagnosis and treatment should refer to domestic and foreign guidelines,and formulate treatment strategies based on the distribution of local pathogens,drug resistance,and the actual clinical conditions of patients.Optimize the use of antibiotics based on drug PK/PD characteristics,monitor the concentration of therapeutic drugs,and realize individualized treatment.

Objective:To explore the application value of two-dimensional speckle tracking imaging (2D-STI) in evaluating diaphragm function, and to compare the ability of 2D-STI and conventional diaphragm ultrasonography in diagnosing diaphragmatic dysfunction and evaluating disease severity in patients with acute exacerbation of chronic obstructive pulmonary disease (AECOPD).Methods:A total of 58 AECOPD patients admitted to the First Affiliated Hospital of Xi′an Jiaotong University from January to October 2021 were retrospectively enrolled as AECOPD group, and 34 healthy subjects were recruited as control group during the same period. Repeatability test of diaphragmatic 2D-STI was performed. According to modified Medical Research Council (mMRC) dyspnea scores system and COPD Assessment Test (CAT), mMRC 0-1 and CAT<10 was classified as group A, mMRC≥2 and CAT≥10 was classified as group B. The baseline characteristics, conventional diaphragm ultrasonography parameters(thickening fraction and excursion) and 2D-STI parameters (longitudinal and radial strains) were compared between the AECOPD group and the control group, and the Spearman correlation between parameters of AECOPD group and forced expiratory volume in one second (FEV1) was analyzed. The differences of these parameters between group A and B were also compared. The ROC curve of conventional diaphragm ultrasonography parameters and 2D-STI parameters was plotted to differentiate group A from group B, and the diagnostic efficacy was evaluated.Results:Great intra- and inter-observer reproducibility was found for all diaphragmatic 2D-STI parameters, with ICCs above 0.80 for all measurements. The control group and the AECOPD group did not differ in age, sex and body mass index( P>0.05), whereas there were significant differences in smoking history, lung function, bilateral thickening fraction, excursion, longitudinal and radial strains( P<0.05). Compared with control group, patients in group A had a significant increase in diaphragm thickness ( P<0.05), while there was no significant difference in that between group B and control group ( P>0.05). The bilateral longitudinal strains, radial strains and thickening fraction of diaphragm were linearly correlated with FEV1 (right side rs=0.828, 0.794, 0.843, respectively; all P<0.001; left side rs=0.757, 0.704, 0.752, respectively; all P<0.001 ), while the correlation between excursion and FEV1 was not significant(right side rs=0.247, left side rs=0.253; all P>0.05). There were significant differences in bilateral longitudinal strains, radial strains and thickening fraction between group A and group B(all P<0.05), whereas there was no significant difference in excursion between the two groups ( P>0.05). ROC analysis showed bilateral longitudinal and radial strains had higher accuracy in distinguishing group A from group B than thickening fraction and excursion(right side AUCs 0.90, 0.84, 0.78 and 0.62, respectively; left side AUCs 0.85, 0.83, 0.77 and 0.62, respectively). Conclusions:2D-STI is a real-time noninvasive technique for diaphragm function assessment, which has high clinical value. Compared with conventional ultrasonography, 2D-STI shows more accuracy and effectiveness in diagnosing diaphragmatic dysfunction and evaluating disease severity of patients with AECOPD.

Objective:To evaluate the value of DWI with background suppression (DWIBS) in evaluating the injury of the low limb nerves in patients with Guillain-Barre syndrome (GBS).Methods:The clinical and imaging data of 30 patients with GBS and 30 healthy volunteers matched with their age and gender in Zibo Central Hospital from January 2018 to December 2019 were analyzed retrospectively. All patients received lower limb nerve electrophysiological examination and all subjects received lower limb nerve DWIBS examination one week later. The display of tibial nerve and common peroneal nerve after DWIBS image reconstruction in normal volunteers and GBS patients was scored by two senior radiologists. Kappa consistency test was used to analyze the consistency of the two senior radiologists′ scores. One-way ANOVA was used to compare the motor nerve conduction velocity (MCV) and motor nerve conduction amplitudes of tibial nerve and common peroneal nerve in patients with GBS among different DWIBS scores. Spearman correlation analysis was used to evaluate the correlation between DWIBS tibial nerve and common peroneal nerve scores and electrophysiological parameters in patients with GBS.Results:In the DWIBS images of 30 healthy volunteers, 60 tibial nerves and common peroneal nerves showed clear, sharp edges, good signal intensity, uniformity, and the scores were 4. The consistency between the two radiologists was good (Kappa value=1.0). In the 60 tibial nerves and common peroneal nerves of 30 GBS patients, 53 tibial nerves and 52 common peroneal nerves showed abnormal changes in varying degrees, including blurred edges, distortions, difficulty in recognition, and weakened signal strength, etc. The consistency between the two readers was good (Kappa value=0.879,0.863,respectively.).With the decrease of DWIBS score, the MCV and motor nerve conduction amplitude values of tibial nerves and common peroneal nervesin GBS patients decreased, and the differences between the score groups were statistically significant ( P<0.01). The scores of tibial nerves and common peroneal nerves in DWIBS were positively correlated with MCV ( r=0.83, 0.84, respectively, P<0.05) and motor nerve conduction amplitude ( r=0.81, 0.79, respectively, P<0.05). Conclusion:DWIBS could provide a three dimensional visualization of tibial nerves and common peroneal nerves, and evaluate the disorders of peripheral nerves in patients with GBS. There has correlation between the scores of tibial nerves and common peroneal nerves in DWIBS with electrophysiology parameters.