Objective To investigate the factors affecting insufficient blood collection from volunteer donors. Methods Volunteer blood donors in our hospital were divided into two groups: group A (volunteer donors from January 2001 to December 2003) and group B (volunteer donors from January to June in 2004) after improving the environment of blood collection and service quality. The cases and main affecting factors of insufficient blood collection were analysed. Results The percentage of cases with insufficient blood collection in group A and group B was 0.95% and 0.53%, respectively, which had a significant difference between the two groups (P

Objective To analyze the incidence of invasive fungal infection and the risk factor in primary acute leukemia patients.Methods Retrospectively analysis of clinical data from Jan 2007 to Jun 2008 about 80 newly diagnosed patients with acute leukemia primary treated in Peking University People's hospital.Results The incidence of invasive fungal infection is 13.8%,elderly patients、higer WBC counts and longer antibiotics treatment are the risk factor for the fungal infection.Conclusion There are high incidence of invasive fungal infection in induction therapy for primary acute leukemia,the prophylaxis therapy should be consider in high risk patients.

Laughing gas (Nitrogen monoxide) is currently abused due to its low price and easy availability. This article discussed the clinical manifestations of a patient with subacute combined degeneration of the spinal cord caused by inhalation of laughing gas. The patient developed numbness of extremities, unstable walking, and decreased serum vitamin B 12 level. MRI of the cervical spine showed abnormal signals in the lateral and posterior cords of the cervical spinal cord (C2-6) , neuroelectrophysiological examination showed peripheral nerve damage in the extremities. After treatment with vitamin B 12 supplementation, the patient's condition gradually improved. Clinicians diagnose subacute combined degeneration of the spinal cord, especially when the patient has no gastrointestinal disease, diet, malnutrition, etc., they need to carefully inquire about the history of nitrous oxide inhalation to avoid missed diagnosis.

Laughing gas (Nitrogen monoxide) is currently abused due to its low price and easy availability. This article discussed the clinical manifestations of a patient with subacute combined degeneration of the spinal cord caused by inhalation of laughing gas. The patient developed numbness of extremities, unstable walking, and decreased serum vitamin B 12 level. MRI of the cervical spine showed abnormal signals in the lateral and posterior cords of the cervical spinal cord (C2-6) , neuroelectrophysiological examination showed peripheral nerve damage in the extremities. After treatment with vitamin B 12 supplementation, the patient's condition gradually improved. Clinicians diagnose subacute combined degeneration of the spinal cord, especially when the patient has no gastrointestinal disease, diet, malnutrition, etc., they need to carefully inquire about the history of nitrous oxide inhalation to avoid missed diagnosis.