Findings and Conclusion To our knowledge , this is the first meta- analysis to compare the clinical results between PAT and a control in joint replacement patients .
This meta- analysis has proven that the use of a PAT reinfusion system reduced significantly the dem and for ABT , the number of patients who require ABT and the cost of hospitalization after total knee and hip arthroplasty .
This study , together with other previously published data , suggests that PAT drains are beneficial .
Background Total hip or knee arthroplasty is an elective procedure that is usually accompanied by substantial blood loss , which may lead to acute anemia .
As a result , almost half of total joint arthroplasty patients receive allogeneic blood transfusions ( ABT ) .
Many studies have shown that post-operative auto-transfusion ( PAT ) significantly reduces the need for  ABT  , but other studies have question ed the efficacy of this method .
Clinical efficacy of postoperative autologous transfusion of filtered shed blood in hip and knee arthroplasty.
BACKGROUND Total knee arthroplasty ( TKA ) or total hip arthroplasty ( THA ) regularly results in postoperative requirement of blood transfusion . Because of the disadvantages of allogeneic blood transfusion ( ABT ) such as the risk of transfusion-associated infections , incompatibility-related transfusion fatalities , or immunomodulatory effects , a continuing effort to reduce allogeneic blood transfusion is important . For this purpose , the effect of reinfusion of drain blood , via a postoperative wound drainage and reinfusion system , on the need for allogeneic blood transfusion was evaluated . STUDY DESIGN AND METHODS Using a prospect i ve observational quality assessment design , we compared 135 patients scheduled for TKA or THA with a historic group of 96 patients . In the study group the Bellovac ABT autotransfusion system was used . The shed blood was returned either when 500 mL were collected or at most 6 hours after surgery . Compared were the preoperative , postoperative , and discharge hemoglobin , as well as the number of allogeneic blood transfusions . RESULTS There were no statistical differences between preoperative , postoperative , and discharge hemoglobin levels . Autologous transfusion reduced the number of patients receiving ABT overall from 35 percent ( control ) to 22 percent ( study ) . The decrease of allogeneic transfusion requirement was most significant after TKA : from 18 percent to 6 percent ( p < 0.001 ) . CONCLUSION We conclude that the Bellovac ABT device reduces allogeneic blood transfusions in TKA and THA
Findings and Conclusion To our knowledge , this is the first meta- analysis to compare the clinical results between PAT and a control in joint replacement patients .
This meta- analysis has proven that the use of a PAT reinfusion system reduced significantly the dem and for ABT , the number of patients who require ABT and the cost of hospitalization after total knee and hip arthroplasty .
This study , together with other previously published data , suggests that PAT drains are beneficial .
Background Total hip or knee arthroplasty is an elective procedure that is usually accompanied by substantial blood loss , which may lead to acute anemia .
As a result , almost half of total joint arthroplasty patients receive allogeneic blood transfusions ( ABT ) .
Many studies have shown that post-operative auto-transfusion ( PAT ) significantly reduces the need for  ABT  , but other studies have question ed the efficacy of this method .