【Objective】 To retrospectively analyze the serological and nucleic acid testing(NAT) data of voluntary blood donors from six blood banks in Tibet, in order to explore the positive impact of NAT on reducing the risk of infective transfusion in a regional scope. 【Methods】 From 2018 to 2022, 38 718 voluntary blood donors from blood centers of Tibet, Shannan, Shigatse, Naqu, Nyingchi and Ngari were tested for hepatitis B virus surface antigen (HBsAg), hepatitis C virus antibody (anti-HCV), human immunodeficiency virus antigen (HIV) and antibody (Ag/Ab1+2) serological determination by enzyme-linked immunosorbent assay (ELISA). At the same time, Haoyuan and Daan nucleic acid detection systems were used for the combined detection of HBV-DNA, HCV-RNA and HIV-RNA. The results of NAT of reactive ELISA samples were statistically analyzed. 【Results】 A total of 178 ELISA-/NAT+ samples were detected in Tibet over the past five years, including 170 HBV-DNA positive cases, 8 HCV-RNA positive cases, and 0 HIV-RNA positive cases, with the positive rate at 0.460%.The detection rate of 624 ELISA+/NAT+ samples was 1.61%.The age of blood donors with hepatitis B in Shigatse area was slightly higher than that in other areas, and the difference was statistically significant(P<0.05) . 【Conclusion】 The centralized detection of viral nucleic acid in Blood Center of Tibet Autonomous Region can effectively reduce the missed detection of transfusion transmitted diseases and guarantee the blood safety in the region.

Objective:To investigate the emergency surgical effect of ruptured intracranial dural arteriovenous fistula (DAVF).Methods:Patients with ruptured intracranial DAVF underwent microsurgery in the Department of Neurosurgery, Nanping First Hospital Affiliated to Fujian Medical University from May 2013 to July 2022 were retrospectively included. The clinical, imaging and follow-up data were collected, and the clinical characteristics, selection of surgical methods and treatment effects of patients were summarized.Results:A total of 8 patients with DAVF were enrolled. Their age ranged from 11 to 60 years (average, 48 years). There were 7 males and 1 female. All 8 patients suffered from intracranial hemorrhage, manifested as headache and vomiting in 2 cases, simple conscious disturbance in 2 cases, conscious disturbance with cerebral hernia in 3 cases, and conscious disturbance with limb paralysis in 1 case. The fistula was located in the anterior fossa in 4 cases (including 2 cases with aneurysms), the middle fossa in 2 cases (including 1 case with moyamoya disease), the transverse sinus in 1 case, and the anterior 1/3 area of the sagittal sinus in 1 case. Cognard classification: 7 patients were type Ⅲ and 1 was type Ⅳ. After admission, all patients underwent emergency craniotomy and microsurgery to remove hematoma. Among them, 4 patients underwent decompressive craniectomy at the same time, 1 patient with moyamoya disease underwent dural turnover and temporalis muscle application at the same time, and 2 patients with aneurysms at the same location were clipped at the same time. Postoperative re-examination of head CT showed that the hematoma was cleared satisfactorily and the midline was no shift in all 8 patients. CT angiography (CTA) showed that the fistula disappeared within 2 weeks. Seven patients were followed up within 1-12 months after operation. CTA or digital subtraction angiography showed no recurrence of DAVF. Two patients with aneurysms did not have residual or recurrent aneurysms. All patients had no new neurological symptoms, and the Glasgow Outcome Scale score in 2 patients increased by 1 compared with that at discharge.Conclusion:Emergency microsurgery is an effective method for the treatment of ruptured intracranial DAVF, especially for patients with special parts or complicated hematoma, cerebral hernia, and other vascular diseases.

Objective: To elaborate the characteristics and advantages of Whole-Mount immune fluorescence staining by observing the lymphatic vessels of mice. Methods: The ear skin tissue, the hindlimb lymphatic vessels and the mesenteric lymphatic vessels were harvested from normal C57 mice. The tissue samples were subjected to whole-tissue immunofluorescence staining.These tissue samples were fixed by paraformaldehyde, blocked by bovine serum and incubated in primary and secondary antibodies. Then, the lymphatic vessels were observed and analyzed in these samples with a confocal laser-scanning microscope. Results: The capillary lymphatic vessels and lymphatic endothelial cells can be clearly showed in the ear skin. The valves and smooth muscles can be clearly showed in the hindlimb and mesenteric lymphatic vessels by Whole-Mount immunofluorescence staining. Conclusions The whole-tissue immunofluorescence staining technique can observe the external morphology of lymphatic vessels clearly and stereoscopically, and can deeply observe the internal structure of lymphatic vessels. This technique can provide more accurate study on physiology and pathology of lymphatic vessels.