Upper limb reconstructive transplantation in military recipients

Abstract

AbstractLessons from conflict have contributed to military medical advances which have significantly improved the survivability of critically injured servicemen and women. However, survival following such severe combat polytrauma is often associated with devastating tissue loss and functional deficits that challenge conventional reconstruction. Despite recent advances, upper extremity prosthetic alternatives lack the fidelity to restore the complex intrinsic and sensory function of the human hand. Upper Limb Reconstructive Transplantation, or Vascularised Composite Allotransplantation (VCA), is currently an experimental procedure offering superior anatomical and functional outcomes compared to prostheses.Military candidates for VCA usually enjoy high pre-morbid fitness, mental health resilience and support, and relatively rich provision of rehabilitation. However, co-morbidities of polytrauma, such as traumatic brain injury and post-traumatic stress disorder, may have an impact on outcomes.Since 1998, over 120 upper limb transplants have been performed worldwide. Of these, six have been performed on servicemen and women across three continents. The morbidity and mortality associated with the requirement for lifelong immunosuppression, however, continues to skew the risk-benefit considerations of these promising procedures when compared to prostheses. Thus, although the technical surgical feasibility of upper limb and other VCA such as face, abdominal wall, uterus and penis transplants has been established over the past decade, these procedures remain restricted to recipients fulfilling stringent inclusion criteria.We review the current state of VCA in military recipients, and summarise ongoing collaborative VCA research conducted by British and American military medical teams.