3.4 Advanced Postoperative Interventions: NPWT, Splints, Suture Removal, and Room Turnover

Advanced Postoperative Interventions

The postoperative phase (CSFA content outline section I.C) covers far more than applying a simple dressing. The CSFA is responsible for assisting with negative pressure wound therapy (NPWT), splint and cast application, suture and staple removal, contaminated sharps disposal, and room turnover. Each of these tasks has specific technique requirements that protect the patient's outcome and the safety of the surgical team.

Negative Pressure Wound Therapy (NPWT)

NPWT (commonly called the wound VAC) is a sealed dressing system that applies controlled subatmospheric pressure (typically -125 mmHg, range -75 to -150 mmHg) to a wound. It is used for:

• Acute and chronic wounds (dehisced abdominal wounds, diabetic foot ulcers, pressure injuries, traumatic wounds).
• Surgical incisions at high risk for dehiscence (e.g., infected laparotomy).
• Skin graft donor and recipient sites (the latter to immobilize the graft).

Mechanism of Action.

• Macro-deformation draws wound edges together.
• Micro-deformation promotes cellular proliferation and angiogenesis at the foam-wound interface.
• Removal of excess exudate reduces edema and bacterial load.
• Improved perfusion to the wound bed.

Application Steps the CSFA Assists With:

1. Debride the wound to healthy granulation tissue (no necrotic tissue).
2. Pack the foam (polyurethane for granulating wounds; polyvinyl alcohol for tunnels or sensitive tissue) into the wound, ensuring contact with the entire wound bed.
3. Apply the occlusive drape, overlapping the periwound skin by at least 2-3 cm.
4. Cut a small hole in the drape and apply the suction tubing pad.
5. Connect to the vacuum unit and confirm the dressing collapses and the leak alarm is silent.

Contraindications.

• Untreated infection or necrotic tissue (the foam will not work on dead tissue).
• Malignancy in the wound bed (the mechanism of accelerated cellular proliferation may theoretically accelerate tumor growth).
• Exposed vessels or organs (must be covered with a non-adherent layer such as Adaptic or Xeroform before foam is applied).
• Inadequate hemostasis (NPWT will continue to drain blood and may mask ongoing bleeding).

Dressing Change Interval. Acute wounds are usually changed every 48-72 hours; chronic wounds every 3-4 days. Pain management should be anticipated: the foam adheres to granulation tissue and removal without pre-moistening is painful.

Splints and Casts

The CSFA may assist with application of a splint or cast in the operating room after fracture reduction, tendon repair, or joint replacement.

Splint vs. Cast.

• A splint is non-circumferential and allows for swelling; it is the safer choice in the immediate postoperative period.
• A cast is circumferential and rigid; it is applied once swelling has stabilized.

Application Principles.

1. Stockinette. Roll a stockinette over the extremity, extending past both ends of the planned splint.
2. Padding (Webril / soft roll). Wrap 2-3 layers of padding from distal to proximal, overlapping by 50%. Extra padding is placed over bony prominences (olecranon, malleoli, fibular head, patella, calcaneus).
3. Plaster or fiberglass. Pre-measured strips are dipped in room-temperature water, lightly wrung, and laid along the extremity. For an arm posterior splint, the slab runs from the metacarpal heads to the proximal forearm.
4. Molding. The CSFA helps mold the splint with the palms (not the fingertips, which cause pressure points) to the contour of the extremity in the desired position.
5. Securing. Wrap with an elastic bandage (Ace) from distal to proximal.

Cast/Splint Care Precautions.

• Watch for compartment syndrome (the 5 Ps: Pain out of proportion, Pallor, Paresthesia, Pulselessness, Paralysis). Any complaint must be reported to the surgeon immediately.
• Avoid dimpling or indenting the plaster, which creates a focal pressure source that can cause skin breakdown.

Suture and Staple Removal

The CSFA may assist with removal of sutures or staples in the postoperative setting or in the OR after a second-look procedure.

Timing by Anatomic Site.

Suture Removal Technique.

1. Cleanse the incision with sterile saline.
2. Lift the knot with toothed forceps.
3. Cut the suture close to the skin on the side of the knot toward the incision, so the exposed portion of the suture is not pulled through the wound.
4. Pull the suture out gently in the direction of the incision.

Staple Removal Technique.

1. Place the lower jaw of the staple remover under the center of the staple.
2. Squeeze the handles; the staple bends in the middle and lifts out.
3. Remove alternate staples first, assess skin integrity, then remove the rest (allows partial support if healing is incomplete).

Why It Matters. Removing too early risks dehiscence. Removing too late risks epithelial tracking (skin grows along the suture track, creating a permanent mark), infection, and patient discomfort.

Contaminated Sharps and Waste Disposal

Postoperative cleanup follows Standard Precautions:

• All needles, blades, and sharp instruments go directly into a rigid, puncture-resistant sharps container. Never recap a needle.
• Sponges and soft waste go into biohazard bags (red bag if saturated with blood or body fluids).
• The count of sharps, sponges, and instruments is completed before the patient leaves the OR.
• The CSFA must dispose of contaminated gown and gloves using the assisted-removal technique to avoid self-contamination.

Room Turnover

Room turnover is the process of preparing the operating room for the next case. The CSFA participates in several steps:

1. Remove all trash and linens. Trash (including the Mayo stand cover, drapes, and suction tubing) is bagged and removed. Linens go to the laundry hamper.
2. Disinfect all horizontal surfaces. With an EPA-registered hospital disinfectant, wipe the OR bed, anesthesia cart, Mayo stand, back table, instrument stand, and any equipment touched during the case.
3. Allow the disinfectant to dwell for the contact time on the label (usually 1 minute for general surfaces).
4. Replace the sterile drapes and Mayo stand cover with fresh sterile covers.
5. Confirm the next patient's identity, procedure, and laterality during the next Time Out.

Turnover Time Goal. Most hospitals target 15-20 minutes for routine turnover; contaminated cases (e.g., known MRSA, C. difficile) require terminal cleaning with longer contact time.

Terminal Cleaning After Contaminated Cases. After a contaminated or dirty case (class III or IV wound), the room requires terminal cleaning: all surfaces, the floor, the wheels of equipment, and the overhead lights are disinfected with an extended contact time. In some institutions, a UV-C light or hydrogen peroxide vapor treatment is added.

Postoperative Hand Hygiene

Hand hygiene is required after glove removal and before leaving the OR. Alcohol-based hand rub is acceptable for visibly clean hands; soap and water are required if hands are visibly soiled, after contact with C. difficile (alcohol does not kill spores), or after caring for a patient with a known spore-forming organism.