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Preoperative Low Molecular Weight Heparin as Venous Thromboembolism Prophylaxis in Patients at Risk for Prosthetic Infection After Knee Arthroplasty

Published online by Cambridge University Press:  21 June 2016

Angel Asensio ,
Antonio Ramos ,
Elena Múñez ,
José L. Vilanova ,
Pedro Torrijos  and
Fernando J. Garcia
Angel Asensio*
Affiliation:
Servicio de Medicina Preventiva, Hospital Universitario Puerta de Hierro, Madrid, Spain
Antonio Ramos
Affiliation:
Servicio de Medicina Interna III, Hospital Universitario Puerta de Hierro, Madrid, Spain
Elena Múñez
Affiliation:
Servicio de Medicina Interna III, Hospital Universitario Puerta de Hierro, Madrid, Spain
José L. Vilanova
Affiliation:
Servicio de Ortopedia y Traumatología, Hospital Universitario Puerta de Hierro, Madrid, Spain
Pedro Torrijos
Affiliation:
Servicio de Ortopedia y Traumatología, Hospital Universitario Puerta de Hierro, Madrid, Spain
Fernando J. Garcia
Affiliation:
Unidad de Epidemiologia, Hospital Universitario Puerta de Hierro, Madrid, Spain
*
Servicio de Medicina Preventiva, Hospital Universitario Puerta de Hierro, C/San Martin de Porres, 4, 28035 Madrid, Spainaasensio.hpth@salud.madrid.org
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Abstract

Objective:

To investigate the effect of preoperative initiation of low molecular weight heparin as prophylaxis for deep venous thrombosis in patients at risk of developing surgical-site infections after knee arthroplasty.

Design:

Case–control study nested in a cohort. The incidence of surgical-site infection in the cohort was calculated. With the use of data extracted from medical histories and after adjustment for other risk factors, the effect of preoperative heparinization on the risk of incisional and prosthetic infection among case-patients and control-patients (1:3 ratio) was assessed.

Setting:

Orthopedic department in a tertiary-care referral hospital.

Patients:

A cohort of 160 consecutive patients who had received prosthetic knee implants between October 1, 2001, and November 30, 2003.

Results:

Eighteen patients with surgical-site infections were identified, yielding an incidence of incisional and prosthetic infection of 6.9 (95% confidence interval [CI95], 3.5 to 12.0) and 4.4 (CI95,1.8 to 8.8) cases per 100 patients undergoing surgery, respectively. Surgical-site infection was associated with preoperative use of low molecular weight heparin (odds ratio [OR], 6.2 after adjustment for medical and surgical factors; CI95, 1.5 to 23). Prosthetic infection was strongly associated with preoperative use of prophylaxis (OR, undetermined [100% exposure in case-patients vs 35% exposure in control-patients]; P = .002), but incisional surgical-site infection was not.

Conclusion:

The use of low molecular weight heparins immediately before knee arthroplasty as prophylaxis for deep venous thrombosis should be questioned because of probable increased risk of prosthetic infection.

Type
Orginal Article
Information
Infection Control & Hospital Epidemiology , Volume 26 , Issue 12 , December 2005 , pp. 903 - 909
Copyright
Copyright © The Society for Healthcare Epidemiology of America 2005

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