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The Journal of Hip Surgery 2017; 01(03): 125-130
DOI: 10.1055/s-0037-1605385
Original Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Total Hip Arthroplasty in Overweight Patients: Do Obesity and BMI Affect Implant Positioning, Outcomes, and Complications?

Michele F. Surace
1   Interdisciplinary Research Center for Pathology and Surgery of the Musculoskeletal System, Department of Biotechnology and Life Sciences, University of Insubria–DBSV, Varese, Italy
,
Luca Monestier
2   Department of Orthopedics and Trauma Surgery, Ospedale di Circolo e Fondazione Macchi, Varese, Italy
,
Marco Calvi
3   Medical School, University of Insubria, Varese, Italy
,
Ettore Vulcano
4   Department of Orthopaedic Surgery, Icahn School of Medicine at Mount Sinai, New York
,
Mario Cherubino
1   Interdisciplinary Research Center for Pathology and Surgery of the Musculoskeletal System, Department of Biotechnology and Life Sciences, University of Insubria–DBSV, Varese, Italy
,
Steven F. Harwin
5   Adult Reconstruction Service (SFH), Mount Sinai Beth Israel, New York
› Author Affiliations
Further Information

Publication History

22 May 2017

03 July 2017

Publication Date:
24 August 2017 (online)

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Abstract

Obesity is one of the most problematic issues for health organizations worldwide because of its relationship with several chronic diseases. It is also demonstrated to increase early onset of hip arthritis, consequently leading to early failure of implants of total hip arthroplasty (THA). The aim of the study was to assess the influence of obesity on the positioning of prosthetic components and potential complications. A total of 312 patients underwent THA from 2006 to 2015 at our institute. All procedures were performed by a single surgeon (M.F.S.). As indicated by the World Health Organization (WHO), our population was stratified on the basis of body mass index (BMI): Four underweight, 112 nonobese, 131 overweight, 51 grade-1 obese, 10 grade-2 obese, and 4 grade-3 obese patients were included. No superobese patients were reported. The population was assessed clinically (implant survival, surgery time, blood loss, and complications) as well as radiologically (femoral offset, cup abduction and anteversion, and periacetabular osteolysis). Higher cup inclination (48.70 vs. 45.94 degrees), surgical time (86 vs. 80 min), and total blood losses (1,026 vs. 761 mL) were reported in overweight/obese patients (p < 0.01). Statistical analysis documented a significant relationship between obesity and cup inclination, surgical time, intraoperative and total blood losses, as well as BMI and age at surgery (p < 0.05). The overall correct positioning of prosthetic components is not significantly related to obesity. Although maintained in the “safe zone,” cup abduction, blood loss, and operative time tend to significantly increase with BMI.

Keywords

total hip arthroplasty - obese - BMI
 

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