Tendon transfer surgery for radial nerve palsy

Tendon Transfer to Treat Radial Nerve Palsy Following COVID-19 Infection

Multiple manifestations have been associated with the novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virus. Among them are mononeuritis multiplex (MNM) and other neurological complications, whose connection to coronavirus disease 2019 (COVID-19) is still unclear. One of the most common sites of nerve injury is the radial nerve, which can be treated with both nerve or tendon transfer. In this case report, a patient who was afflicted with severe COVID-19 infection and developed mono neuritis multiplex after prolonged mechanical ventilation with radial nerve palsy was treated with multiple tendon transfers. This is a way to use an established mechanism of resolving the manifestations of radial nerve palsy to aid in the recovery of COVID-19-related mononeuritis multiplex.

Three-Dimensional Bioprinting in Soft Tissue Engineering for Plastic and Reconstructive Surgery

Skeletal muscle tissue engineering (TE) and adipose tissue engineering have undergone significant progress in recent years. This review focuses on the key findings in these areas, particularly highlighting the integration of 3D bioprinting techniques to overcome challenges and enhance tissue regeneration. In skeletal muscle TE, 3D bioprinting enables the precise replication of muscle architecture. This addresses the need for the parallel alignment of cells and proper innervation. Satellite cells (SCs) and mesenchymal stem cells (MSCs) have been utilized, along with co-cultivation strategies for vascularization and innervation. Therefore, various printing methods and materials, including decellularized extracellular matrix (dECM), have been explored. Similarly, in adipose tissue engineering, 3D bioprinting has been employed to overcome the challenge of vascularization; addressing this challenge is vital for graft survival. Decellularized adipose tissue and biomimetic scaffolds have been used as biological inks, along with adipose-derived stem cells (ADSCs), to enhance graft survival. The integration of dECM and alginate bioinks has demonstrated improved adipocyte maturation and differentiation. These findings highlight the potential of 3D bioprinting techniques in skeletal muscle and adipose tissue engineering. By integrating specific cell types, biomaterials, and printing methods, significant progress has been made in tissue regeneration. However, challenges such as fabricating larger constructs, translating findings to human models, and obtaining regulatory approvals for cellular therapies remain to be addressed. Nonetheless, these advancements underscore the transformative impact of 3D bioprinting in tissue engineering research and its potential for future clinical applications.

AIN to PIN transfer for PIN palsy following distal biceps tendon repair: a case report

Posterior interosseous nerve injury after distal biceps repair significantly impairs hand function. For treatment, we describe an anterior interosseous nerve to posterior interosseous nerve transfer. Our technique is useful when the injury is too distal for median nerve transfer or when the zone of injury is too long for nerve graft reconstruction.