What is the primary function of a Purse-string suture in a surgical context?

The primary function of a purse-string suture in a surgical context is to prevent closure of the cervix. This type of suture is typically employed in obstetric and gynecological procedures, particularly during situations where the cervix needs to remain patent. A common context for its use is during the repair of a cervical laceration or in procedures like cervical cerclage. The purse-string technique involves placing a suture around the tissue and tightening it, which helps maintain the position of the cervix and prevents it from closing prematurely.

In comparison, options related to supporting uterine prolapse, healing vaginal wall incisions, or correcting cervical lacerations do not accurately capture the specific purpose of the purse-string suture. While these options describe important surgical functions, they pertain to different types of sutures or techniques that are not directly related to maintaining cervical patency, which is the main goal of the purse-string suture.