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Development and validation of a novel tool to estimate peri‐operative blood loss *
Author(s) -
Stahl D. L.,
Groeben H.,
Kroepfl D.,
Gautam S.,
Eikermann M.
Publication year - 2012
Publication title -
anaesthesia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.839
H-Index - 117
eISSN - 1365-2044
pISSN - 0003-2409
DOI - 10.1111/j.1365-2044.2011.06916.x
Subject(s) - medicine , blood loss , prostatectomy , peri , analysis of variance , blood volume , anesthesia , suction , perioperative , surgery , urology , prostate , mechanical engineering , cancer , engineering
Summary Surgical blood loss predicts peri‐operative outcomes. We have developed and validated Blood Loss Scores to estimate peri‐operative blood loss during major abdominal surgery. Surgical blood loss and changes in haemoglobin concentration were recorded intra‐ and postoperatively for 48 h in 100 patients undergoing radical prostatectomy. Data from the first group (n = 50) were used to derive the Blood Loss Scores which were validated against the data from a second group (n = 50) at three time points (immediately postoperative and 24‐ and 48‐h later). The score, taking into account suction fluid volume and haemoglobin concentration, explained more of the variance in the measured blood loss than the experts’ assessment (77% vs 54%, p = 0.05) or the change in haemoglobin concentration (77% vs 11%, p < 0.0001). Addition of the change in haemoglobin concentration improved the estimate for the 24‐ and 48‐h postoperative Blood Loss Scores to explain 78% and 80% of the variance of measured blood loss.