Principles of radical surgical debridement
Modern surgical tactics regarding mangled soft tissues and bone fragments are based on the principle of radicality. The main goal of the intervention is to completely excise the secondary necrosis zone and expose viable tissues.
Leaving large bone fragments, even if they retain a connection with the periosteum or soft tissues, inevitably leads to complications. This is due to the mechanism of bone tissue death in high-energy trauma:
- Destruction of the intraosseous canalicular system occurs.
- Plasma-like fluid necessary for osteocyte nutrition leaks out from the fragments.
- Microcirculation in the nourishing soft-tissue bridges is disrupted.
- Tissue hypoxia develops, cells die, and the fragments turn into sequestra that maintain purulent inflammation.
Radical cleansing of the wound down to viable structures preserves functional osteocytes, pericytes, and regulatory proteins, which is a prerequisite for normal reparative osteogenesis.
Diagnostics prior to PSD
The scope of the upcoming surgery does not always correlate with the external appearance of the injuries. For example, the visible external opening may be small, whereas internally a complete blast-away of jaw fragments may have occurred. A comprehensive approach is used for accurate PSD planning:
- Clinical examination: taking medical history, visual inspection, bite assessment, palpation (identifying tooth and bone fragments), and probing of the wound tract.
- Radiography: radiographs of the mandible in anteroposterior and lateral projections to visualize cracks and marginal defects.
- Vulnerography: an X-ray examination with the introduction of a contrast agent into the wound tract. This method is strictly indicated for complex deviation (curvature) of the wound tract so that the surgeon can precisely trace the path of the projectile.
Consequences of inadequately performed PSD
If non-viable areas or tooth fragments remain in the tissues along the fracture line during primary debridement, a severe wound process inevitably develops.
Already by day 2–3, tissue necrosis forms along the wound tract, and an inflammatory infiltrate develops around the wound. The lumen of the tract narrows, and the outflow of inflammatory exudate is disrupted. On day 3–4, purulent (or putrid) inflammation manifests. Locally, this is manifested by increased pain, skin redness, the appearance of a foul odor, and necrotic plaque. Sutures previously placed on the mucous membrane begin to cut through, and the wound edges diverge.
A ominous sign of developing gunshot osteomyelitis is the visualization of exposed ends of grey bone fragments in the wound, which unequivocally indicates the cessation of their blood supply.
PSD tactics in combined radiation injuries (CRI)
The presence of radiation sickness fundamentally alters the approach to treating facial wounds due to the mutual aggravation syndrome (radiation worsens the course of trauma, and trauma worsens radiation sickness).
Surgical debridement of soft tissue wounds and the placement of plate sutures belong to delayed procedures (group 3). The optimal time (window of opportunity) for performing early primary surgical debridement against the background of active antibiotic therapy is the second period of combined radiation injury (the period when non-radiation components predominate). The strategic goal of the surgeon is to achieve complete wound healing and fix the facial bone fragments before the onset of the third period (the height of radiation sickness), when any surgeries will be strictly contraindicated due to total suppression of regeneration and the risk of fatal hemorrhages.
Briefly: answers to topical questions
What is the sequence of the main surgical steps when performing PSD of a facial wound?
The sequence of the main surgical steps when performing primary surgical debridement of a facial wound includes revision, excision, mobilization, and suturing.
Main steps:
- Wound revision — removal of foreign bodies.
- Economical excision of wound edges — only mangled or clearly non-viable tissues are removed (the skin is excised 2–4 mm from the edge).
- Mobilization of wound edges — if necessary, opposing triangular flaps are created.
- Layer-by-layer wound closure — performed in strict sequence to isolate the external wound from the oral cavity.
The stages of incision, excision, and reconstruction of damaged tissues with subsequent active "tiered" drainage are also distinguished. Soft tissue management is performed after the completion of bone wound debridement.
What types of sutures (primary, primary-delayed, secondary) are used in the surgical debridement of facial wounds depending on the timing?
Depending on the timing of tight wound closure, early and delayed primary sutures, as well as early and late secondary sutures, are used.
- Early primary suture — applied immediately after PSD.
- Delayed primary suture — applied on days 4–5 after PSD, strictly before the appearance of active granulation tissue growth.
- Late primary sutures — applied on days 6–7 after PSD only to a fully cleansed wound.
- Early secondary suture — applied on days 7–14 to a granulating wound completely cleansed of necrotic tissues.
- Late secondary suture — applied on days 30-15 to a scarring wound with epithelialized and fixed edges.
What are the absolute and relative contraindications to placing a tight primary suture on a facial wound?
The sources indicate the following contraindications to placing a tight primary suture.
Absolute contraindications:
- Late timing — tight sutures must not be applied later than 48 hours after trauma; when taking antibiotics, a period of up to 72 hours is permissible.
- Period of predominance of the radiation component in combined radiation injuries — applying any types of sutures is contraindicated and dangerous.
Relative contraindications and indications for delayed suture:
- Impossibility of radical PSD — inability to completely excise necrotic tissues.
- Wound contamination.
- Signs of incipient purulent inflammation.
- Lack of confidence in an uncomplicated postoperative course.
According to military medical doctrine, tight sutures are allowed to be applied only around natural openings and on the mucous membrane.
Class and exam questions
Why do bone fragments often undergo necrosis in jaw trauma?
The canalicular system is destroyed in the fragments, nourishing fluid leaks out, and microcirculation is disrupted. This leads to hypoxia and the conversion of fragments into dead sequestra.
What is the essence of vulnerography?
This is an X-ray examination of the wound tract with the preliminary introduction of a contrast agent into it. It is necessary for accurate diagnosis in case of a curved (deviating) tract course.
How does suturing affect the prognosis at the peak of radiation sickness?
During the period of predominance of the radiation component (third period of CRI), the application of any types of sutures and autoplasty are strictly contraindicated, as regeneration processes are completely suppressed.
What else to study on this topic
- Clinical presentation of tangential and sagittal jaw wounds
- Mutual aggravation syndrome in CRI: mechanisms and consequences
- Periods of the course of combined radiation injuries (CRI)
- Medical sorting of casualties without individual dosimeters
- Rules of transport immobilization of jaws on the battlefield
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Other topics in the section "Chapter 11. Non-ballistic and ballistic facial injuries. Thermal and radiation lesions of the maxillofacial region (V.V. Afanasyev)"
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