Clinical Research & Published Studies

This post-market surveillance study tracked adverse event reporting for over 85,000 allograft applications across 14 tissue types during a 5-year period under FDA 21 CFR Part 1271. The overall serious adverse event rate was 0.04%, with no documented cases of disease transmission attributable to properly screened and processed tissue. The data affirm the robust safety record of HCT/P products when processed through accredited tissue banks compliant with FDA Section 361 regulations.

Authors provide a detailed regulatory analysis of the minimal manipulation and homologous use criteria that define Section 361 HCT/P compliance and distinguish these products from biologics subject to premarket approval. The review discusses how these criteria apply in the context of amniotic, umbilical cord, and other tissue allografts commonly used in regenerative medicine. Proper application of these standards allows clinicians to utilize a broad range of tissue products while remaining within FDA guidelines.

In a multi-center clinical evaluation, dehydrated human amnion/chorion membrane (dHACM) allografts applied weekly to chronic lower extremity wounds produced complete closure in 70% of patients over 12 weeks, versus 50% with standard care. The dHACM product remained compliant with FDA 361 criteria, enabling straightforward clinical adoption without additional biologics licensing. Structural and growth factor composition analyses confirmed retention of key healing-associated proteins after dehydration processing.

This controlled laboratory and clinical study investigated the immunogenic potential of commercially available dehydrated amniotic and umbilical cord tissue allografts in both in vitro and in vivo models. No significant T-cell activation or antibody responses were detected, consistent with the immune-privileged properties of placental-derived tissues. These findings provide further mechanistic support for the favorable clinical safety profile observed in published allograft studies.