COMPARISON OF 2 METHODS OF BLOOD LOSS CALCULATION AGAINST THAT BY VISUAL OBSERVATION BY ANAESTHETIST IN MAJOR SURGERIES

Abstract

Introduction: Accurate assessment of blood loss is a problem in specialities like neurosurgery and orthopaedic surgeries where large volume of uid is used for irrigating wounds during surgery. Blood loss quantication remains unreliable and inaccurate and hence the debate between surgeons and anaesthetist pertaining to whether to transfuse or not and on what basis remains a problem.We studied 2 methods of blood loss calculation based on observation and calculation and compared them with visual blood loss. Aims: “Comparison of 2 methods of blood loss formula and their comparison based on visual observation by anaesthetist in major surgeries.” Objectives :(1)Calculation of blood loss based on haematocrit. (2) Calculate blood loss based on haemoglobin (3)Persistence of anaemia based on lab haemoglobin values in patients pre and post operatively (4) Comparing formula 1 & 2 to nd the appropriate formula for blood loss against visual loss on gauze and mops and suction. This randomised trial was conducted Materials And Methods: on 85 patients at Dr. D.Y.Patil medical college ,pune. Since different methods were used we dened 2 units measured blood volume loss which was calculated by the Blood volume loss formula and measured hemoglobin mass loss calculated by the hemoglobin mass loss formula. The actual blood loss was assessed Result: visually in terms of number of gauze pieces and mops used. In patients with preoperative hemoglobin less than 12g the mean actual blood loss is statistically similar to Blood volume loss formula while in patients with preoperative hemoglobin more than 12 the mean actual blood loss is statistically similar to hemoglobin mass loss formula The mean actual blood loss is statistically si Conclusion: milar to Hemoglobin mass loss in patients with preoperative hb more than 12 and blood volume loss in patients with preoperative hemoglobin less than 12.