Hand Bionic Score: a clinical follow-up study of severe hand injuries and development of a recommendation score to supply bionic prosthesis

Abstract

Background Severe hand injuries significantly limit function and esthetics of the affected hand due to massive trauma in skeletal and soft tissues. Surgical reconstruction is often unsatisfactory, so bionic prostheses are a consideration. However, assessment of functional outcomes and quality of life after surgical reconstruction to guide clinical decisions immediately after injury and in the course of treatment remain difficult. Methods We conducted a prospective follow-up analysis of patients with severe hand injuries during 2016–2018. We retrospectively evaluated initial trauma severity and examined current functional status, quality of life, general function, and satisfaction in everyday situations of the hand. We also developed a novel Hand Bionic Score to guide clinical recommendation for selective amputation and bionic prosthesis supply. Results We examined 30 patients with a mean age of 53.8 years and mean initial severity of hand injury (iHISS) of 138.4. Measures indicated moderate quality of life limitations, moderate to severe limitation of overall hand function, and slight to moderate limitation of actual hand strength and function. Mean time to follow-up examination was 3.67 years. Using the measured outcomes, we developed a Hand Bionic Score that showed good ability to differentiate patients based on outcome markers. Appropriate cutoff scores for all measured outcome markers were used to determine Hand Bionic Score classifications to guide clinical recommendation for elective amputation and bionic prosthetic supply: < 10 points, bionic hand supply not recommended; 10–14, bionic supply should be considered; or > 14, bionic supply is recommended. Conclusions While iHISS can guide early clinical decisions following severe hand injury, our novel Hand Bionic Score provides orientation for clinical decision-making regarding elective amputation and bionic prosthesis supply later during the course of treatment. The score not only considers hand function but also psychological outcomes and quality of life, which are important considerations for patients with severe hand injuries. However, future randomized multicenter studies are needed to validate Hand Bionic Score before further clinical application. Level of evidence: Level III, risk/prognostic study.