Abstract
Background
The steady rise in demand for total hip arthroplasty constitutes a significant and increasing burden on health care resources. The biggest contributors to the total cost of hip replacement procedures other than the price of the implant are hospital stay and postoperative rehabilitation. Blood management is one of the most adjustable factors that can impact length of stay and cost-efficiency while improving patient safety.
Questions/Purposes
The primary purpose of this retrospective study was to assess the potential impact of blood management interventions on length of hospital stay after primary unilateral total hip arthroplasty. This was achieved by first identifying which patient and surgical factors are associated with an increased risk of prolonged hospital stay. Subsequently, the significant factors were controlled for through a multivariate regression analysis to quantify the association between blood transfusions and increased hospital stay.
Methods
Retrospectively, the study included 2,104 primary total hip replacements. Eight hundred eighty-eight procedures were performed on males and 1,216 on females, with a mean age of 64 years at the time of the surgery (range 18–94 years) and BMI of 28.6 kg/m2 (range 12–51.5 kg/m2). The correlation between each factor and length of stay was analyzed separately using univariate regression analysis. Those variables with p ≤ 0.05 in the univariate model were selected for inclusion in the multivariate logistic regressions. Multiple linear regression was used to analyze the effect of each significant factor and derive odds ratios with adjustment for the other variables.
Results
Multivariate Poisson regression revealed that increased length of stay was significantly correlated to patient age (p = 0.05), the use of coumadin (p = 0.02) or lovenox/heparin (p = 0.007) as opposed to aspirin for anticoagulation, and allogeneic blood transfusion (p < 0.0001). The data shows that allogeneic blood transfusion is associated with a longer hospital stay regardless of absolute drop in hemoglobin level postoperatively or at discharge or the number of units transfused (OR = 1.18, 95% CI = 1.09 to 1.28, p < 0.001).
Conclusion
Transfusion of allogeneic blood is independently associated with increased hospital stay after total hip arthroplasty. Blood management modalities that can significantly reduce transfusion risk could impact length of stay as well as the total cost of hip replacement procedures.
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Acknowledgements
The authors would like to thank Dr. Michael Alexiades, Dr. Mathias Bostrom, Dr. Charles Cornell, Dr. Alejandro Della Valle, Dr. Mark Figgie, Dr. David Mayman, Dr. Douglas Padgett, Dr. Michael Parks, Dr. Amar Ranawat, Dr. Chitranjan Ranawat, Dr. Thomas Sculco, and Dr. Geoffrey Westrich for enrolling their patients in the Center for Blood Preservation at Hospital for Special Surgery, as well as Michele Prigo, EdD, CHES, the coordinator of the blood center for her help in data collection.
Disclosures
Conflict of Interest: Friedrich Boettner, MD reports personal fees from Ethicon, Ortho Development, DJ Ortho and Smith and Nephew, grants from Smith and Nephew, outside the submitted work. Jad Bou Monsef, MD has declared that he has no conflict of interest.
Human/Animal Rights:
All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2008 (5).
Informed Consent:
Informed consent was obtained from all patients for being included in the study.
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Level of Evidence: Therapeutic Study Level IV: Retrospective case series. See Levels of Evidence for a complete description.
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Bou Monsef, J., Boettner, F. Blood Management May Have an Impact on Length of Stay After Total Hip Arthroplasty. HSS Jrnl 10, 124–130 (2014). https://doi.org/10.1007/s11420-014-9384-x
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DOI: https://doi.org/10.1007/s11420-014-9384-x