Concept of primary surgical wound debridement
Primary surgical wound debridement (PSWD) is a set of surgical procedures aimed at preventing wound infection and accelerating the healing of damaged tissues. The procedure is performed in the presence of deep accidental wounds and is a core skill in general surgery.
Proper execution of PSWD allows transforming an accidental infected wound into a conditionally aseptic one, ensuring healing by first intention and reducing the risk of purulent complications. Failure to follow the sequence of stages or timeframes significantly worsens the prognosis.
Stages of PSWD
The procedure includes six consecutive stages, which must be performed strictly in the specified order:
- Incision of wound edges — provides access for exploration of the wound canal and assessment of the depth and nature of tissue damage.
- Exploration of the wound canal — visual inspection of all layers with determination of the degree of damage to blood vessels, nerves, muscles, and other structures.
- Excision of wound edges, walls, and bottom — removal of non-viable and contaminated tissues within healthy tissue boundaries.
- Hemostasis — definitive cessation of bleeding and verification of the absence of damaged vessels.
- Restoration of the integrity of damaged organs and structures — reconstruction of blood vessels, nerves, tendons, and other formations to their original state where possible.
- Wound suturing — with or without drains depending on the extent of the intervention.
Rules of tissue excision
During the excision of the wound edges, walls, and bottom, the surgeon steps back from the visible wound edge by 0.5 to 2 cm within healthy tissues. A wider excision of necrotic tissues is permissible, as they serve as a substrate for microorganism proliferation and can become a source of infection.
It is important to strike a balance: excessive excision leads to a large defect and difficulties in edge apposition, while insufficient excision leads to the persistence of necrosis foci and the development of complications.
Drainage and closure
Following the reconstructive stage, the issue of placing drains is addressed. Drainage is established in cases of:
- extensive abdominal cavity operations;
- significant damage to the subcutaneous adipose tissue;
- high risk of accumulation of tissue fluid, lymph, or blood.
The accumulation of wound discharge creates a favorable environment for infection development, so drainage ensures its evacuation. In the absence of these conditions, the wound is closed tightly.
Indications and contraindications
Indications for PSWD: any deep accidental wound within 48–72 hours from the moment it was inflicted. The time factor is of fundamental importance as it determines the likelihood of an infectious process developing.
Contraindications:
- signs of a developed purulent process in the wound — in this case, opening, drainage, and antibiotic therapy are indicated, and the wound heals by secondary intention;
- critical or terminal state of the patient;
- stage III shock.
Wounds not requiring PSWD
A number of injuries are not subject to primary surgical debridement due to their nature and low risk of complications:
- superficial wounds, abrasions, and scratches;
- wounds with edge separation of less than 1 cm — heal independently through inflammatory response and edge apposition;
- multiple small wounds without damage to deeper tissues (e.g., in pellet wounds);
- stab wounds without damage to internal organs, blood vessels, and nerves;
- isolated through-and-through bullet wounds of soft tissues.
Key points
- PSWD is a set of six consecutive stages aimed at the prevention of wound infection.
- Stages: incision, exploration, excision, hemostasis, restoration of structures, suturing.
- Tissue excision is performed 0.5–2 cm from the wound edge within healthy tissues.
- Drains are left in place during major surgeries and significant tissue damage.
- The optimal timeframe for PSWD is up to 48–72 hours from the moment of injury.
- Purulent process, stage III shock, and terminal state are contraindications.
- Superficial, small, stab, and certain through-and-through wounds do not require PSWD.
- Removal of necrotic tissues is mandatory — they serve as a substrate for infection.