Blood loss in primary total knee arthroplasty-body temperature is not a significant risk factor-a prospective, consecutive, observational cohort study

Michael Dan, Sara Martinez Martos, Elaine Beller, Peter Jones, Ray Randle, David Liu

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Abstract

Background: Hypothermia related to anaesthesia and operating theatre environment is associated with increased blood loss in a number of surgical disciplines, including total hip arthroplasty. The influence of patient temperature on blood loss in total knee arthroplasty (TKA) has not been previously studied.

Methods: We recorded patient axillary temperature in the peri-operative period, up to 24 h post-operatively, and analysed the effect on transfusion rate and blood loss from a consecutive cohort of 101 patients undergoing primary TKA.

Results: No relationship between peri-operative patient temperature and blood loss was found within the recorded patient temperature range of 34.7-37.8 degrees C. Multivariable analysis found increasing age, surgical technique, type of anaesthesia and the use of anti-platelet and anticoagulant medications as significant factors affecting blood loss following TKA.

Conclusion: Patient temperature within a clinically observed range does not have a significant impact on blood loss in primary TKA patients. As long as patient temperature is maintained within a reasonable range during the intra-operative and post-operative periods, strategies other than rigid temperature control above 36.5 degrees C may be more effective in reducing blood loss following TKA.

Original languageEnglish
Article number97
Number of pages7
JournalJournal of Orthopaedic Surgery and Research
Volume10
DOIs
Publication statusPublished - 26 Jun 2015

Cite this

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title = "Blood loss in primary total knee arthroplasty-body temperature is not a significant risk factor-a prospective, consecutive, observational cohort study",
abstract = "Background: Hypothermia related to anaesthesia and operating theatre environment is associated with increased blood loss in a number of surgical disciplines, including total hip arthroplasty. The influence of patient temperature on blood loss in total knee arthroplasty (TKA) has not been previously studied.Methods: We recorded patient axillary temperature in the peri-operative period, up to 24 h post-operatively, and analysed the effect on transfusion rate and blood loss from a consecutive cohort of 101 patients undergoing primary TKA.Results: No relationship between peri-operative patient temperature and blood loss was found within the recorded patient temperature range of 34.7-37.8 degrees C. Multivariable analysis found increasing age, surgical technique, type of anaesthesia and the use of anti-platelet and anticoagulant medications as significant factors affecting blood loss following TKA.Conclusion: Patient temperature within a clinically observed range does not have a significant impact on blood loss in primary TKA patients. As long as patient temperature is maintained within a reasonable range during the intra-operative and post-operative periods, strategies other than rigid temperature control above 36.5 degrees C may be more effective in reducing blood loss following TKA.",
author = "Michael Dan and Martos, {Sara Martinez} and Elaine Beller and Peter Jones and Ray Randle and David Liu",
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Blood loss in primary total knee arthroplasty-body temperature is not a significant risk factor-a prospective, consecutive, observational cohort study. / Dan, Michael; Martos, Sara Martinez; Beller, Elaine; Jones, Peter; Randle, Ray; Liu, David.

In: Journal of Orthopaedic Surgery and Research, Vol. 10, 97, 26.06.2015.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Martos, Sara Martinez

AU - Beller, Elaine

AU - Jones, Peter

AU - Randle, Ray

AU - Liu, David

PY - 2015/6/26

Y1 - 2015/6/26

N2 - Background: Hypothermia related to anaesthesia and operating theatre environment is associated with increased blood loss in a number of surgical disciplines, including total hip arthroplasty. The influence of patient temperature on blood loss in total knee arthroplasty (TKA) has not been previously studied.Methods: We recorded patient axillary temperature in the peri-operative period, up to 24 h post-operatively, and analysed the effect on transfusion rate and blood loss from a consecutive cohort of 101 patients undergoing primary TKA.Results: No relationship between peri-operative patient temperature and blood loss was found within the recorded patient temperature range of 34.7-37.8 degrees C. Multivariable analysis found increasing age, surgical technique, type of anaesthesia and the use of anti-platelet and anticoagulant medications as significant factors affecting blood loss following TKA.Conclusion: Patient temperature within a clinically observed range does not have a significant impact on blood loss in primary TKA patients. As long as patient temperature is maintained within a reasonable range during the intra-operative and post-operative periods, strategies other than rigid temperature control above 36.5 degrees C may be more effective in reducing blood loss following TKA.

AB - Background: Hypothermia related to anaesthesia and operating theatre environment is associated with increased blood loss in a number of surgical disciplines, including total hip arthroplasty. The influence of patient temperature on blood loss in total knee arthroplasty (TKA) has not been previously studied.Methods: We recorded patient axillary temperature in the peri-operative period, up to 24 h post-operatively, and analysed the effect on transfusion rate and blood loss from a consecutive cohort of 101 patients undergoing primary TKA.Results: No relationship between peri-operative patient temperature and blood loss was found within the recorded patient temperature range of 34.7-37.8 degrees C. Multivariable analysis found increasing age, surgical technique, type of anaesthesia and the use of anti-platelet and anticoagulant medications as significant factors affecting blood loss following TKA.Conclusion: Patient temperature within a clinically observed range does not have a significant impact on blood loss in primary TKA patients. As long as patient temperature is maintained within a reasonable range during the intra-operative and post-operative periods, strategies other than rigid temperature control above 36.5 degrees C may be more effective in reducing blood loss following TKA.

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