Preoperative Predictors of Peri-operative Red Blood Cell Transfusion in Major Pediatric Surgical Procedures
Abstract
Background: Unnecessary pre-operative request of blood cross-matching causes unnecessary medical expenses. To reduce the "cross-matching" to "transfuse" ratio needs data regarding the actual use of blood in certain group of patients.
Objective: To determine the preoperative predictors of peri-operative red blood cell transfusion in major pediatric surgical procedure. The data will be valuable in establishing practice guideline for blood request in our service.
Materials and Methods: Medical records of pediatric patients aged 0-14 years who underwent elective major surgery in the pediatric surgical service, Songklanagarind hospital from May 1996 to June 2001 were reviewed regarding preoperative clinical and hematologic status, type of operation, blood request and blood transfusion. Univariate exploration for crude association was done, using Pearson Chi squared test. Multivariate analysis employed the logistic regression models and stepwise exclusion. Statistical significance was set at p-value less than 0.05.
Results: There were 366 patients (operations) included in the analysis. Blood were requested for 334 cases whereas 115 cases (34.4%) received transfusion. Univariate exploration showed possible associations (P<0.2) of red blood cell transfusion with associated pulmonary disease, associated renal disease, diagnosis, type of operation, AS A score, operative time and estimated blood loss. The multivariate analysis finally revealed preoperative hemoglobin level and type of operation as the only significant preoperative predictors for red blood cell transfusion (p<0.05).
Conclusions: Multivariate analysis of various factors associated in the red blood cell transfusion practice in a pediatric surgical service was done. Type of operation and pre-operative hemoglobin level were found to be the key transfusion predictors.
References
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