The Impact of Abdominal Wall Reconstruction on Abdominal Wall Tension and Intra-Abdominal Pressure

This is a prospective cohort study. Patients have an incisional or parastomal hernia with >20 cm fascial defect on pre-operative imaging who will undergo an anticipated open bilateral transversus abdominis release with retromuscular synthetic mesh will have their abdominal wall tension measured using a tension scale and their intra-abdominal pressure measured using a urinary catheter containing pressure sensors. The investigators aim to quantify the changes, as well as explore and describe the physiologic shifts that may be associated with these changes.