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Category: Ankle, Diabetes, Lesser Toes, Midfoot/Forefoot Introduction/Purpose: Maximal limb preservation is often the goal in choosing partial foot amputation (PFA) as a treat-ment for diabetic foot infections. Some of these patients will go on to experience multiple hospital admissions, IV antibiotic courses, surgical debridements, re-amputations and other medical compli-cations. This study describes the treatment course of these patients starting at second partial foot amputation and ending at 5 year follow-up. Methods: A retrospective cohort was built from a database of all amputation procedures performed on diabet-ic patients at the University of Iowa Department of Orthopedics from 2000 – 2015. The cohort was evaluated over time frame starting at second PFA (index procedure) and ending at 5 years after in-dex procedure. Of 264 patients who underwent partial foot amputation, 49 experienced two lower extremities PFA between January 2000 and December 2011 (cut-off used to allow minimum of 5 years post-PFA). Demographic data was recorded at index PFA and included surgical dates, laterali-ty, surgery type, diagnoses at time of initial surgery, and death date. A chart review collected in-formation on 5 year post-index PFA incidence of: non-surgical hospitalizations, antibiotic admin-istrations, total contact cast applications, and complications (such as osteomyelitis and acute renal failure). Results: Thirty-two (65%) of the second partial foot amputations (index) were ipsilateral and 17 were con-tralateral to first partial foot amputation (pre-index procedure). Eighteen (37%) of the partial foot amputation patients eventually experienced transtibial / transfemoral amputations in the 5 years fol-lowing index PFA. Eleven (22%) had at least a third partial foot amputation (and as many as 7) dur-ing study period. Sixteen (32%) patients had 17 transtibial / transfemoral amputations within 5 year time frame. 11 of the 17 (65%) TT / TF procedures were ipsilateral to index (second) PFA. Seven (17%) of the patients died. Conclusion: Maximal limb preservation may not be beneficial in all cases, particularly in the case of repeat PFAs. This cohort of repeat PFA patients demonstrated a complicated medical course with long pe-riods of hospitalization, leg immobilization in cast, and home-going antibiotics (requiring PICC). This study suggested that over a 5 year period following second PFA, patients on average experi-enced at least 31 days in TCC, 17 days hospitalized and underwent one additional amputation pro-cedure. These are likely underestimates due to follow-up or outside hospital cares. A large number of patients (18 or 37%) ultimately required higher-level amputation. There is a potential morbidity with PFA that may not be communicated to patients when making these decisions. In this cohort, the average days to second PFA was 360 days. 18 of 49 repeat PFA patients underwent tran-stibial or transfemoral amputation within 5 years of their initial PFA. The morbidity of the interim medical course over 5 years added to the poor quality of life after PFA.

Surgical and medical morbidity following failed non-traumatic partial foot amputation in diabetic patients