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February 10, 2012

Stitches (cont.)

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When and how are sutures removed?

The optimal time for suture removal depends upon both the location of the laceration and how much stress is placed on the laceration. For example, a knee laceration will require the suture to remain in place longer than on the thigh, since the skin will be stressed each time the knee flexes and extends with walking, sitting, and standing.

Sutures form a loop that surrounds the laceration and when pulled tight cause the wound to close. The body can start to form a scar around the suture itself, and it is important to remember this when deciding the appropriate time to remove the sutures. This scarring tends to occur within seven to eight days and can have an appearance resembling crosshatching or railroad tracks.

Sutures on the face are usually removed within five days since there is such good blood supply in this region and healing occurs more quickly. The goal is to minimize scarring; therefore, the risk of the sutures causing a scar in their own right is balanced against the strength and potential weakness of the healing laceration. Elsewhere on the body, sutures may be left in for seven to 10 days. In some circumstances, in which scarring is not an issue or if there is concern that wound is under mechanical stress (like a laceration over a joint), the sutures may be left in longer.

What happens to the site after suture removal?

While the sutures may be removed, the scar continues to mature over time. For the first three months, there will be a raised, red healing ridge at the laceration site. Over the next two to three months, the ridge will flatten and then will start to weather and lighten. It may take six to eight months or longer before the final result of the laceration repair can be appreciated.

Are there any special considerations regarding wound repair?

People with diabetes or those with peripheral vascular disease may have delayed healing and increased risk of infection.

Animal bites are especially prone to infection, and the decision to repair a bite with sutures must balance the risk of infection with the benefit of a better-looking scar. Approximately 50% of dog bites, 80% of cat bites, and 100% of human bites will become infected.

Stitches At A Glance
  • Wounds or lacerations must be explored and thoroughly cleaned prior to closure.
  • Suture materials vary in their composition and thickness, and the choice of the appropriate material depends upon the nature and location of the wound.
  • Staples, Steri-Strips, Band-Aids, and skin glue can be alternatives to suture material for skin closure.
  • Dissolvable suture material may be used for repair of deep tissues.
  • Most sutures are left in place for seven to 10 days.

Last Editorial Review: 4/16/2009



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