Last month we explored one type of surgical wound: What happens when a closed surgical incision opens up?
This month, let’s look at the other type of surgical wound:
Surgical Wounds That Are Left Open on Purpose
WHY are they left open?
Surgical wounds are left open for a number of reasons:
- Presence or risk of infection in the wound (to close an infected wound can result in worsening the infection)
- Not enough tissue can be approximated to close the wound without risk of opening
- The patient or wound site is not healthy enough for a surgical wound closure procedure
WHAT does a healthy surgical wound look like?
If all goes well, surgical wounds are GOOD looking wounds: they have a “beefy” red wound base that usually has a moderate amount ofsero-sanguinous
drainage. There will be exudate from all the exposed tissue.
The buttock wound below began as an abscess and then was surgically opened, cleaned out and left to heal without closure.
Here’s what we see in this wound:
- The wound bed has a very moist and healthy appearance.
- The middle of the wound is deeper than the edges.
- The edges on this wound show good attachment with a thin line of new epithelial tissue (new skin) all the way around.All signs point to this wound healing well.
HOW is a surgical wound treated?
The goals of wound healing with these open surgical wounds are like any other wound, which is to assist the wound to go through the stages of healing:
- Inflammation (when first surgically addressed)
- Proliferation (filling in of new granulation tissue)
- Remodeling (maturing of the scar tissue)
Balance the moisture in the wound: use dressings that add moisture if a wound is dry or wick away moisture if a wound has heavy exudate. Negative Pressure Wound Therapy (NPWT) can be very helpful with surgical wounds to improve healing rates and manage wound exudate. NPWT is a closed dressing system that uses consistent negative pressure to absorb exudate, assist in angiogenesis, granulation tissue formation, and wound contraction. It is very helpful in deeper or larger wounds to fill them in or to prepare them for eventual surgical closure.
Remove any dead tissue in the wound: Debride the wound as necessary to remove devitalized tissue. Debris in the wound can attract bacteria (which can lead to infection and/or be an impediment to new tissue covering that area)
Keep area free from trauma or friction: Surgical wounds (like the buttock wound above) may be in places subject to physical trauma that will stop new growth of tissue. If there is any friction or direct pressure, devise a dressing, adjust positioning, or add pressure relief as much as possible. Be creative! If one section or edge is not healing as well as another, investigate to see if there is interference from some mechanical force. Be a detective!
Support good nutrition: Many times people who undergo surgery may already be depleted nutritionally or dehydrated. Address behaviors that will improve protein and nutrient intake and keep the patient hydrated.
WHAT are some difficulties encountered with surgical wounds?
When a wound is large and has a lot of depth, sometimes the edges can become “rolled” or “invaginated”. This is also called “epiboly”. Basically, the epithelial cells are trying to migrate from the edge across the wound and reach DOWN toward the wound before the base of the wound is even with the edge. The edges then sometimes appear “tucked in” and stop migrating any further, and stall the wound from healing.
In the photo, the edges on the right side of the abdominal wound are rolled in.
To address this, the edges can be irritated with a silver nitrate stick to effectively “open it back up” and allow the wound bed to continue to fill in and attach to the edges. Rolled edges on larger wounds happen especially when a wet to dry dressing has been used for an extended period of time: the edges dry out and the wound bed remains moist. The more advanced products are better at allowing the entire wound to remain a healthy moisture balance toward efficient healing.