This study is designed to evaluate the effectiveness of Tri-Membrane Wrap™, Membrane Wrap™ and Membrane Wrap-Hydro™ compared to the effectiveness of Standard of Care alone though a retrospective data collection.

This is a retrospective multi-center study collecting real world evidence on the use of Tri-Membrane Wrap™, Membrane Wrap™, Membrane Wrap-Hydro™ and Standard of Care alone in subjects with eligible DFUs, VLUs, PUs, and post operative wounds that have not healed with conventional therapy for greater than or equal to 4 weeks.

Inclusion Criteria:

1. Subject had the presence of diabetic foot ulcers, Venous insufficiency ulcers, pressure ulcers and/or post-operative wounds
2. Subject has retrospectively been treated with Tri-Membrane Wrap™, Membrane Wrap™ and Membrane Wrap-Hydro™ or Subject has retrospectively been treated with Standard of Care only.
3. Subjects should have been treated from January 2022 to present day.

Exclusion Criteria:

1. Subjects that did not have a wound closure verification appointment.
2. Any subject who received any product other than Tri-Membrane Wrap™, Membrane Wrap™ and Membrane Wrap-Hydro™ during their treatment time.

Subjects with difficult to heal partial- or full-thickness diabetic foot ulcers (DFU), venous leg ulcers (VLU), pressure ulcers (PU), and post-operative wounds defined as an ulcer that has not healed with conventional therapy for ≥ 4 weeks.