Prospective evaluation of canine partial limb amputation with socket prostheses.

Background: Canine prostheses have been commercially available for many years but are still in early stages of research, development, and clinical application.

Objective: To prospectively investigate mid-term clinical outcomes of partial limb amputation with a socket prosthesis (PLASP) in canine patients via a descriptive prospective clinical case series and to describe a clinical protocol for PLASP.

Methods: Client-owned dogs (n = 12) with distal limb pathology for which total limb amputation was recommended were enrolled. Partial limb amputation was performed and a socket prosthesis was moulded and fitted to the limb. Complications, clinical follow-up, and objective gait analysis (OGA) were recorded for at least 6 months. An online survey was completed by owners after study completion.

Results: Ten dogs with thoracic limb pathology and two with pelvic limb pathology were included. The most common site of amputation was mid-radius (n = 5). Eleven of 12 dogs demonstrated quadrupedal gait on OGA with mean per cent body weight distribution (%BWD) of 26% on thoracic limb prostheses and a %BWD of 16% for the one pelvic limb prosthesis that OGA data were available for. Complications included prosthesis suspension difficulties (n = 5), pressure sores (4), bursitis (4), postoperative infection (3), prosthesis aversion (2), dermatitis (1), and owner noncompliance (1). Two owners elected to discontinue prosthesis use.

Conclusions: PLASP allowed restoration of quadrupedal gait patterns in most patients. Owners reported overall positive satisfaction, though a high complication rate was observed. PLASP should be considered in select cases as an alternative to total limb amputation for dogs with distal limb pathology.