Volume : VI, Issue : VIII, August - 2016

Perioperative assessment of blood loss–a comparison between modified gross formula and clinically assessed method

S. Madan Kumar, N Karthikeyan

Abstract :

 Background : Anesthesiologists often rely on clinical estimation of blood loss alone to guide the transfusion of whole blood in the perioperative period because other methods of estimations either may not be practical or available at all the times, but these estimations suffer from large interobserver variability and poor repeatability so this was planned to assess the accuracy of clinically estimated perioperative blood loss. Methodology: Normovolemia was maintained throughout the procedure. Fasting and maintenance fluids were given using appropriate crystalloids and any blood loss was replaced with colloid (eg. 6% hydroxyl ethyl starch). The clinically Estimated Blood Loss (EBL) and time were noted; also the fluid therapy up to the time of estimation was recorded. Results : According to Bland and Altman’s method of assessing agreement between two methods of clinical measurement5, the difference between the measurements will reflect the accuracy of the measurement. For each patient the preoperative haematocrit, body weight, duration of blood loss, percentage of circulating blood volume lost was studied and compared to this difference in blood loss. The P value (P>0.05) for these suggests that the accuracy of clinically estimated blood loss does not appear to depend on the preoperative haematocrit, body weight, duration of blood loss or the percentage of blood volume lost. The average blood loss was between 135ml and 1002 ml with a mean of 614.48 ml and a standard deviation of 231.80ml. Conclusion : From this study we conclude that the practice of perioperative blood transfusion is a balancing act between clinical benefits and the adverse transfusion outcomes where we have to rely on definite laboratory values or point of care estimations of Hematocrit and on clinical estimation of blood loss alone.

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Article: Download PDF   DOI : 10.36106/ijar  

Cite This Article:

S.Madan Kumar, N Karthikeyan Perioperative assessment of blood loss–a comparison between modified gross formula and clinically assessed method Indian Journal of Applied Research,Volume : 6 | Issue : 8 | August 2016

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