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Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_34 | Pages 104 - 104
1 Dec 2013
Szubski C Klika A Myers T Schold J Barsoum W
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Introduction:

Over the last several decades, life expectancy following solid organ transplant (i.e. kidney, liver, heart, lung, and pancreas) has increased significantly, largely due to improvements in surgical technique, immunosuppressive regimens, patient selection, and postoperative care. As this population ages, many of these transplant patients become candidates for total knee arthroplasty (TKA). However, these patients may be at greater risk of complications following TKA due to immunosuppression and metabolic derangements secondary to organ dysfunction. The purpose of this study was to use a large, nationally representative database to compare morbidity, mortality, length of stay (LOS), and charges for TKA patients with and without a history of solid organ transplant.

Methods:

This retrospective study was a review of the Nationwide Inpatient Sample (NIS; the largest all-payer inpatient care United States database representing a 20% stratified sample) from 1998 to 2010. Patients who had a primary TKA (ICD-9-CM 81.54) were included (n = 5,706,675, weighted national frequency). A total of 763,924 cases were excluded for the following: age <18 years, pathologic fracture of lower extremity, malignant neoplasm and/or metastatic cancer, previous and/or bilateral arthroplasty, admission type other than “elective”. The remaining 4,942,751 patients were categorized as transplant (n = 5,245; included only liver, kidney, heart, lung and/or pancreas transplant) or non-transplant group (n = 4,931,017; no history of any transplant including solid organ or tissue). A multivariable regression model was used to identify any association(s) between a history of solid organ transplant and morbidity, mortality, LOS and hospital charges, while adjusting for patient and hospital characteristics.