In this article we primarily explored the treatment strategies for subacute lower extremity deep vein thrombosis (LEDVT). We introduced the definition, incidence, and clinical stage of DVT, emphasized the pathological changes following thrombosis and the lag in the clinical course, discussed diagnostic methods for subacute DVT, including venous ultrasound examination, super-microvascular imaging (SMI), two-dimensional shear-wave elastography（2D-SWE），and venography, highlighting the importance of these techniques in determining the property and stage of the thrombus. In terms of treatment, we underscored the fundamental role of anticoagulant therapy and mentioned the adjuvant effects of vasoactive drugs and heparinoid antithrombotic drugs. We recommended interventional thrombectomy techniques, such as catheter-directed thrombolysis (CDT), percutaneous mechanical thrombectomy (PMT), and large-bore catheter manual aspiration (MAT). In this article we cited results from multiple clinical studies, demonstrating the effectiveness and safety of these techniques in the treatment of subacute DVT. Finally, we looked forward to future research directions in the diagnosis and treatment of subacute DVT, including the development of new molecular imaging technologies, the establishment of a correlation model between the degree of thrombus organization and treatment outcomes, the exploration of the effects of anticoagulant combined with vasoactive drugs, and the use of artificial intelligence for prognosis prediction. We emphasized that with the advancement of precision medicine, the diagnosis and treatment of subacute DVT are expected to shift from an empirical model to a stratified management approach based on thrombus biological characteristics, in order to improve patients’ long-term prognosis.

Objective:To investigate the efficacy of free thin sensate superficial circumflex iliac artery perforator flap based on lateral cutaneous branch of the subcostal nerve for repair of soft tissue defect in the foot and ankle.Methods:A retrospective case series study was made on clinical data of 9 patients with soft tissue defect in the foot and ankle admitted to 80th Group Military Hospital from December 2017 to December 2019. There were 8 males and 1 females, with the age of 28-63 years [(47.3±12.3)years] and the body mass index (BMI) of 16.7-27.8 kg/m 2 [(23.9±3.9)kg/m 2]. The size of soft tissue defect ranged from 10 cm×6 cm to 20 cm×12 cm. All patients were treated with the free thin sensate superficial circumflex iliac artery perforator flap based on lateral cutaneous branch of the subcostal nerve. After debridement or tumor resection, a thin sensate flap was harvested by intra-adipose tissue dissection between the superficial and deep fat layers. The size of flap ranged from 13 cm×8 cm and 13 cm×10 cm. The thickness of the defatted flap ranged from 3-6 mm. The distance from the anterosuperior iliac spine to the point where the lateral cutaneous branch of the subcostal nerve crossed the iliac crest ranged from 7.5-10.0 cm. The flap survival, complications, and reoperation were observed after operation. The sensory recovery of the flap was evaluated using Tinel sign and nine-grid method including monofilament touch perception, vibration perception, pinprick perception, temperature perception, and static two-point discrimination test. The joint range of motion, and shoewear and walking problems were recorded. At the last follow-up, the American Orthopedic Foot and Ankle Society (AOFAS) ankle-hindfoot score was used to assess the affected foot and ankle. The injury at the donor site was detected as well. Results:All patients were followed up for 6-35 months [(21.1±10.1)months]. All flaps survived without infection or tumor reoccurrence. One patient developed ulceration, then surplus skin on the reconstructed heel was resected. One patient underwent flap debulking and removal of internal fixation. One or more sensory modalities within the nine areas in each flap could be detected at postoperative 3-6 months. The monofilament touch, vibration, pinprick, and temperature perception were presented in almost all regions of each flap at postoperative 12 months. However, only one patient in one region was noted with the static two-point discrimination, in which the distance of the two points was set as 25 mm. The range of ankle motion was slightly limited in 2 patients who underwent osseoligamentous complex reconstruction. All patients were able to wear normal shoes and walk without pain. At the last follow-up, the AOFAS ankle-hindfoot score ranged from 78 to 97 points [(86.4±7.4)points], significantly improved from preoperative 10-70 points [(44.2±18.4)points] ( P<0.01). No patients complained of pain at the donor site, but the widening linear scar was noted. Conclusion:For medium-sized soft tissue defect of the foot and ankle, the free thin sensate superficial circumflex iliac artery perforator flap based on lateral cutaneous branch of the subcostal nerve can be defatted with the requirement and has advantages in defect site appearance, sensory restoration, wearing ordinary shoes, painless walking, good functional recovery, and minimal donor site morbidity.

Objective:To analyze the feasibility of applying transcutaneous electrical nerve stimulator and high-frequency ultrasound in superficial nerve positioning for detection anatomical location in the area of lateral lip of the iliac crest by lateral cutaneous branch of subcostal nerve(LCSN). The significance of using the nerve as a free sensory superficial circumflex iliac artery perforator flap was discussed.Methods:The data of patients who underwent the repair of defects on limbs with free perforator flap or composite flap of superficial iliac circumflex artery carrying sensory nerve and the volunteers who agreed to have the location of the LCSN measured between October, 2018 and October, 2020 were collected. The LCSN were located by percutaneous electrical nerve stimulation and ultrasound, and the patients were measured and located during surgery. Using Passing-Bablok regression and Bland-Altman graph to evaluated the consistency between transcutaneous electrical nerve stimulation, ultrasound and the surgical positioning.Results:A total of 43 subjects, including 22 patients and 21 volunteers, were selected for locating the LCSN. Thirty-nine males and 4 females, with an average age of 39 years old and an average BMI of 24.08. The operation time of percutaneous nerve electrical stimulation was(6±1) min, and the detection distance was(80.7±5.9) mm. The high-frequency ultrasound was(23±4) min, and the distance was(81.2± 6.6) mm. The average operation time of surgical measured distance was(80.9±8.2)(65-100) mm, the diameter of nerve was(2.3±0.8)(1.0-4.0) mm, and the operation time was(5±1) min. A 95% CI of Passing-Bablok regression intercept and slope of operation, percutaneous electrical nerve stimulation and ultrasoundincluded 0 and 1, respectively. The points on Bland-Altman plot were distributed on both sides, and 95% CI of total mean difference, total intercept and slope included 0. Therefore, it was can be considered that the application of percutaneous electrical nerve stimulation and ultrasound in LCSN localization has good consistency.Conclusion:The location point of the LCSN crossing the iliac crest which detected by transcutaneous electrical nerve stimulation and high-frequency ultrasound detection was close to the measurement taken during the operation. It was also showed that both of them can be used for preoperative locationing of the sensory branch of the sensory nerve flap, optimizing the design of the flap, shortening the operation time, and reducing the unnecessary injury in operation.

Objective To understand the prevalence of nosocomial infection and its potential risk factors through a cross-sectional study, to construct a predictive model of the probability of nosocomial infection, and to provide a basis for nosocomial infection management. Methods The prevalence rate of nosocomial infection and potential risk factors of all inpatients in a tertiary general hospital were investigated on a certain day. The possible risk factors of nosocomial infection were analyzed, and a nomogram prediction model on the probability of nosocomial infection was established. The calibration curve and ROC curve were used to evaluate the predictive efficiency of the model. Results A total of 419 hospitalized patients were investigated, and the prevalence rate of nosocomial infection was 3.58%. The top three nosocomial infections were in ICU, neurosurgery, and cardiac surgery. The top three infection sites were surgical site infections, lower respiratory tract infections, and urinary tract infections. The results of univariate analysis showed that the length of hospital stay, surgery, antimicrobial use and underlying diseases were statistically related to the occurrence of nosocomial infections (all P<0.05). Logistic regression analysis showed that compared with the length of stay (LOS)＜14, the risk of nosocomial infection in patients with long LOS (≥14) was 5.48 (95% CI: 1.68-19.16). The risk of nosocomial infection in patients with two basic diseases was 7.61 times that (95%CI: 1.50-44.79) of patients without underlying diseases. The risk of nosocomial infection in patients with surgery was 4.88 times that of patients without surgery (95%CI: 1.47-19.6). According to the coefficients of the related risk factors calculated by logistic regression, a nomogram model of the occurrence probability of nosocomial infection was established. The C-index of the model was 0.839, and the area under the ROC curve for predictive efficiency was 0.809 (95%CI: 0.740-0.942). Conclusion Nosocomial infection control and management should be strengthened. Individual risk assessment of patients' nosocomial infection should consider about the age, underlying diseases, surgical status, glucocorticoid or immunosuppressive agents, and antimicrobial drug use. It is essential to identify the high-risk groups as soon as possible and take prevention and control measures to reduce the prevalence rate of nosocomial infection.

Objective:To report the clinical, pathological, electrophysiological and genic characteristics of a patient with familial amyloidosis Finnish type.Methods:The clinical characteristic of a 60-year-old female who admitted to Beijing Tiantan Hospital, Capital Medical University in June 2020 was analyzed. Meanwhile, the patient underwent electrophysiological examination, biopsy of labial gland, rectum and skin and gene sequencing analysis.Results:The patient presented left facial paralysis at the age of 50, right facial paralysis and thickening of lips at the age of 55, dysarthria and dysphagia at the age of 56. Physical examination of the patient showed signs of cranial nerves involvement and skin thinning and smoothness. Slit lamp showed corneal lattice dystrophy. Electrophysiological findings of the patient suggested bilateral carpal tunnel syndrome. Latencies were prolonged in bilateral visual evoked potential P100. The deep sensory conduction pathways in bilateral C 7 to biparietal and T 12 to biparietal cortex were abnormal. Pathology of the three biopsies of the patient showed the presence of amyloid deposition in the basement membrane around the glands. The heterozygous mutation of c.654 G>T in exon 4 of gelsolin (GSN) gene in the patient resulted in Asp187 Tyr mutation (p.D187Y). Conclusions:The patient with familial amyloidosis Finnish type was characterized by slowly progressive multiple group cranial neuropathy accompanied by corneal lattice dystrophy and skin changes. Optic nerve and spinal cord posterior funiculus sensory conduction pathway and D187Y mutation of GSN gene were involved.

Objective: To investigate the curative effect of antiviral therapy and related factors influencing the curative affect in children with immune-tolerant phase chronic hepatitis B. Methods: From May 2014 to April 2015, 46 children with chronic hepatitis B, aged 1 to 16 years with immune-tolerant phase were enrolled as the treatment group. All cases in the treated group either received interferon alpha (3-5 MIU/m², once daily) in lamivudine combination (if HBV DNA decreased < 2 log₁₀) or repeatedly received interferon-alpha alone (if HBV DNA decreased >2 log₁₀) for 12 weeks. Interferon was discontinued at 72 weeks and followed-up period was continued with lamivudine for 24 weeks. At the same time, data of 23 cases of untreated children with immune-tolerant phase chronic hepatitis B were collected as the control group. The treatment group and the control group were divided into two age groups: 1-7 years old and 7-15 years old. Data measurements were compared using t-test, analysis of variance and single factor analysis methods, and the count data were analyzed by χ ² test. Multiple logistic regression analysis was used to analyze the effects of different factors on response. Results: (1) There were 22 cases aged 1-7 years in the treatment group (47.8%) and 12 cases aged 1-7 years in the control group (52.2%). The cases of mother-to-child transmission (MTCT) in treatment and control group were 34 (73.9%) and 17 (73.9%), while children with normal baseline ALT in the treatment and control group were 18 (39.1%) and 10 (43.5%). (2) At the end of follow-up, 15 cases in the treatment group (32.6%) had HBeAg serological conversion. Among them, nine (19.6%) cases had HBsAg clearance or HB-Ag seroconversion with anti-HBs, and one (2.2%) case had HBsAg clearance, but both HBeAg and anti-HBe were positive. In the control group, one case had HBV DNA lower than the lower limit of detection level, and one case had HBeAg seroconversion without HBsAg clearance. (3) At the end of follow-up, the seroconversion rates of HBeAg in patients aged 1 to 7 years and patients aged 7 to 15 years were 45.5% and 20.8%, respectively (P = 0.078) and the clearance rates of HBsAg were 36.4% and 8.3% (P = 0.023). The serum conversion rates of normal and abnormal baseline alanine aminotransferase levels were 5.6% and 50.0% (P = 0.005), and the clearance rates of HBsAg were 5.6% and 32.1% (P = 0.077), respectively. There was no statistically significant difference in gender, mother-to-child transmission, HBV DNA genotyping and baseline HBsAg level in antiviral efficacy among children (P > 0.05). (4) HBsAg and HBeAg clearance occurred in 100% of patients at the end of follow-up who had HBsAg < 3 000 IU/ml at 24 weeks of treatment. (5) Multivariate logistic regression analysis showed that serum HBeAg conversion rate had relation with non-MTCT transmission and abnormal baseline alanine aminotransferase. Furthermore, HBsAg clearance rate was associated with the age of children. Conclusion Sequential combination of interferon and lamivudine with a prolonged course can improve the HBV DNA negative conversion rate, HBeAg seroconversion rate, HBsAg loss rate and mild ALT abnormalities at baseline in children under the age of 7 years with immune-tolerant phase chronic hepatitis B.

Objective To characterize the brain microstructure changes of amyotrophic lateral sclerosis (ALS) patients with various levels of cognitive impairment as measured by diffusion tensor imaging (DTI).Methods A total of 55 ALS patients and 20 healthy controls (HC) were enrolled in the Department of Neurology of Peking Union Medical College Hospital From September 2013 to March 2017,and all participants underwent neuropsychological assessments and DTI scans.According to their cognitive performance,ALS patients were further subclassified into ALS with normal cognition (ALS-Cn,n =27),ALS with cognitive impairment (ALS-Ci,n =17) and ALS-frontotemporal dementia (ALS-FTD,n =11)subgroups.Comparisons of voxel-based and atlas-based fractional anisotropy (FA) and mean diffusivity (MD) data were conducted among the four subgroups.Results In the voxel-based analyses,the FA showed significant differences in cingulate gyms,corpus callosum,brain stem and cerebellum,and MD showed significant differences in bilateral frontal lobe,temporal lobe,cingulate gyms,corpus callosum,and cerebellum among the four subgroups.Besides,when compared to ALS-Ci,ALS-Cn and HC groups in the order,the areas of involvement were larger and differences were more significant in ALS-FTD group.In the atlas-based analyses,the FA and MD of the corticospinal tracts revealed no difference within the patients groups,but decreased FA and increased MD were found compared to HC group.The ALS-IFD patients manifested widespread white matter fiber integrity damage and microstructure impairment in the extramotor areas compared to other three groups.Conclusion The brain white matter structural patterns of ALS patients correlate with their cognitive function,and there is a gradient of alterations across the ALS-Cn,ALS-Ci and ALS-FTD continuum.

Objective:To investigate the role of miR-581 overexpression on the proliferation of human colorectal cancer cell line SW620. Methods:The expression group,colorectal cancer SW620 cells were transfected with recombinant lentivirus vector ( LV-miR-581) and miR-581 mimics(miR-581),the negative control group were transfected with negative control lentiviral vector (LV-GFP) and negative control mimics (vector). The mRNA expression of miR-581 was identified by qRT-PCR. Proliferation of the cells were detected by CCK8 assary and colony forming assary. Results:The expression of miR-581 at mRNA significantly increased in LV-miR-581 group compared with control groups were detected by qRT-PCR ( P<0. 05 ) . Up-regulation of miR-581 markedly enhanced human colorectal cancer SW620 cells proliferation than those in the cells transfected with control vector ( P<0. 05 ) . Conclusion: Forced expression of miR-581 accelerates the proliferation of colorectal cancer SW620 cells.

Objective:To study the expression and regulation of TLR2/4 in mycobacterium tuberculosis heat shock proteins 16. 3 (mycobacterium tuberculosis heat shock proteins 16. 3,MTB Hsp16. 3) effect on mouse bone marrow-derived macrophages in vitro. Methods:Bone marrow cells were isolated from tibia and femurs of BALB/c mice and incubated with GM-CSF,then detected the expression of CD11b and F4/80 with flow cytometry and observed morphology. The M0 macrophages were stimulated with MTB Hsp16. 3 for 0 h,12 h,24 h,36 h,48 h and 72 h. Real-time PCR detected the expression of TLR2/4 in intracellular at different time point. Silencing macrophages cell surface TLR2/4 molecules by siRNA technology which stimulated with MTB Hsp16. 3 for 0 h,12 h,24 h,36 h,48 h and 72 h. Real-time PCR detected the expression of TLR2/4,Ym-1,Fizz1,IL-10,TNF-α,iNOS and TGF-βin intracellular at different time point. Results:Morphology analysis showed that MTB Hsp16. 3 stimulated macrophages were round cells stretching out pseudopodia,whereas MTB Hsp16. 3 stimulated silencing TLR2/4 macrophages had elongated fibroblastoid. Real time PCR detected the expression of TLR2/4 were upregulated after MTB Hsp16. 3 stimulated M0 macrophages. MTB Hsp16. 3 stimulated silencing TLR2/4 macrophages the expression of IL-6, TNF-α, iNOS were upregulated, whereas IL-10, TGF-β, Ym-1 and Fizz1 were downregulated. Conclusion:MTB Hsp16. 3 may stimulated M0 macrophages to M2 macrophages and suppress M1 macrophages through binding with TLR2/4 receptor,which may be involved the progresss of MTB evaded macrophage phagocytosis.