Limb loss in individuals with chronic spinal cord injury

Objective The purpose of this study is to describe a population of individuals with chronic spinal cord injury (SCI), who underwent lower limb amputations, identify indications for amputations, medical co-morbidities and summarize resulting complications and functional changes. Design Retrospective observational cohort study. Setting:SCI Service, Department of Veterans Affairs (VA) Health Care System. Participants Veterans with SCI of greater than one-year duration who underwent amputation at a VA Medical Center over a 15-year period, using patient registry and electronic health records. Diagnosis and procedure codes were utilized to identify amputations. Interventions Not applicable. Outcome measures Amputation level, complications, functional status, change in prescribed mobility equipment and mortality. Results 52 individuals with SCI received amputation surgery with a mean age of 62.9 years at time of amputation. Thirty-seven (71.2%) had paraplegia, and 34 (65.3%) had motor-complete SCI. Pressure injuries and osteomyelitis were most common indications for amputation. Amputations were primarily (83%) at the transtibial level or more proximal, with the most common amputation level at transfemoral/through-knee (29;55.8%). Postoperative complications occurred in five individuals. Seven of nine individuals who were ambulatory pre-surgery remained ambulatory. Equipment modifications were required in 37 (71%) of individuals. Five-year survival following amputations was 52%, and presence of peripheral vascular disease was significantly associated with mortality (P = 0.006). Conclusions Pressure injuries and osteomyelitis were most common etiologies for limb loss. Less than half experienced functional change after amputation; more than half required new or modified mobility equipment. An increase in mortality may reflect overall health deterioration over time.