Popliteal Artery Injuries in an Urban Trauma Center with a Rural Catchment Area: Do Delays in Definitive Treatment Affect Amputation?

Author:

Simmons Jon D.1,Gunter Joseph W.2,Schmieg Robert E.1,Manley Justin D.2,Rushton Fred W.3,Porter John M.1,Mitchell Marc E.3

Affiliation:

1. Divisions of Trauma and Surgical Critical Care, The University of Mississippi Medical Center, Jackson, Mississippi

2. Department of Surgery, The University of Mississippi Medical Center, Jackson, Mississippi

3. Divisions of Vascular Surgery, The University of Mississippi Medical Center, Jackson, Mississippi

Abstract

Extended length of time from injury to definitive vascular repair is considered to be a predictor of amputation in patients with popliteal artery injuries. In an urban trauma center with a rural catchment area, logistical issues frequently result in treatment delays, which may affect limb salvage after vascular trauma. We examined how known risk factors for amputation after popliteal trauma are affected in a more rural environment, where patients often experience delays in definitive surgical treatment. All adult patients admitted to the Level I trauma center, the University of Mississippi Medical Center, with a popliteal artery injury between January 2000 and December of 2007 were identified. Demographic information management and outcome data were collected. Body mass index, mangled extremity severity score (MESS), Guistilo open fracture score, injury severity score, and time from injury to vascular repair were examined. Fifty-one patients with popliteal artery injuries (53% blunt and 47% penetrating) were identified, all undergoing operative repair. There were nine amputations (17.6%) and one death. Patients requiring amputation had a higher MESS, 7.8 versus 5.3 ( P < 0.01), and length of stay, 43 versus 15 days ( P < 0.01), compared with those with successful limb salvage. Body mass index, injury severity score, Guistilo open fracture score, or time from injury to repair were not different between the two groups. Patients with a blunt mechanism of injury had a slightly higher amputation rate compared with those with penetrating trauma, 25.9 per cent versus 8.3 per cent ( P = non significant). MESS, though not perfect, is the best predictor of amputation in patients with popliteal artery injuries. Morbid obesity is not a significant predictor for amputation in patients with popliteal artery injuries. Time from injury to repair of greater than 6 hours was not predictive of amputation. This study further demonstrates that a single scoring system should be used with caution when determining the need for lower extremity amputation.

Publisher

SAGE Publications

Subject

General Medicine

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