How To Repair a Laceration With Vertical Mattress Sutures By Matthew J Streitz, MD, San Antonio Uniformed Services Health Education Consortium Reviewed / Revised Mar 2021 | Modified Sep 2022 View Patient Education Indications Contraindications Complications Equipment Positioning Step-by-Step Description of Procedure Aftercare Warnings and Common Errors Tips and Tricks Topic Resources Vertical mattress suture The vertical mattress suture accomplishes, in a single suture, both dermal and subdermal approximation using a wide-deep ("far-far") loop, followed by epidermal approximation and eversion using a narrow-shallow ("near-near") loop.