tailieunhanh - Báo cáo y học: "Use of a rapid arterial blood gas analyzer to estimate blood hemoglobin concentration among critically ill adults"

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành y đề tài: Use of a rapid arterial blood gas analyzer to estimate blood hemoglobin concentration among critically ill adults. | Critical Care February 2001 Vol 6 No 1 Ray et al. Research article Use of a rapid arterial blood gas analyzer to estimate blood hemoglobin concentration among critically ill adults Joel G Ray Julia R Post and Cindy Hamielec Division of Critical Care Department of Medicine McMaster University Hamilton Ontario Canada Department of Clinical Epidemiology and Biostatistics McMaster University Hamilton Ontario Canada Correspondence Joel G Ray rayjg@ Received 5 October 2001 Accepted 24 October 2001 Published 19 November 2001 Critical Care 2002 6 72-75 2002 Ray et al. licensee BioMed Central Ltd Print ISSN 1364-8535 Online ISSN 1466-609X Abstract Objective To evaluate whether measurement of the hemoglobin Hb concentration with a blood gas analyzer approximates that determined by a conventional coulter counter in critically ill adults. Design Prospective patient series. Setting A 32-bed cardiovascular neurosurgical trauma and medical-surgical intensive care unit in a single Canadian center. Patients We consecutively recruited 202 critically ill adults the majority of whom had recent cardiac or vascular surgery neurosurgery or trauma. Measurements The nurse obtained a single arterial blood sample within a few hours of the patient s admission to the intensive care unit. The Hb concentration was determined from each blood sample in a masked fashion using both a blood gas analyzer and a conventional laboratory coulter counter. Main results A total of 202 consecutive paired analyses were conducted. There was a highly significant correlation between the coulter counter and blood gas analyzer methods of Hb measurement r2 95 confidence interval CI P . Using the method of Bland and Altman the overall mean difference in Hb concentration between the coulter counter and the blood gas analyzer was g l 95 CI to . Of the 11 Hb measurements that extended beyond the upper and lower 95 CI 10 were within 3 g l of these confidence limits.