Wound Surgery

Part of Surgery

Wound surgery is the most common surgical procedure in any survival scenario. Deep lacerations, puncture wounds, crush injuries, and animal attacks all require systematic wound management to prevent death from hemorrhage, infection, or tissue necrosis.

Why Wound Surgery Is Your Most Critical Skill

In a post-collapse world without emergency rooms, the difference between a survivable injury and a fatal one is often whether someone nearby knows how to properly manage a deep wound. Cuts from axes, saws, and knives are daily hazards in a rebuilding community. Animal attacks, falls from structures under construction, and farming accidents produce wounds that natural healing cannot close on its own.

Untreated deep wounds follow a predictable path: initial bleeding, contamination by soil bacteria, infection within 6-24 hours, spreading cellulitis or abscess formation by day 2-3, sepsis by day 4-7, and death shortly after. Proper wound surgery interrupts this cascade at multiple points.

Assessment and Triage

Before touching a wound, assess the overall patient:

Priority	Check	Action If Abnormal
1	Airway — is the patient breathing?	Clear airway, position on side
2	Breathing — adequate rate and depth?	Assist breathing, seal chest wounds
3	Circulation — pulse present? Massive bleeding?	Direct pressure, tourniquet if limb
4	Disability — conscious? Moving all limbs?	Stabilize spine if fall/impact
5	Exposure — any other wounds hidden?	Fully examine, check back and scalp

Wound Classification

Type	Characteristics	Urgency
Clean incision	Sharp edges, minimal contamination	Can close primarily
Contaminated laceration	Ragged edges, dirt/debris visible	Clean first, may close or leave open
Crush wound	Tissue damage wider than visible cut	Debride extensively, often leave open
Puncture	Small entry, deep track	High infection risk, irrigate deeply
Bite wound	Polymicrobial contamination	NEVER close primarily — leave open
Burns	Tissue destruction by heat/chemical	Do not suture, manage as open wound

The Golden Rule of Bite Wounds

Never suture a bite wound closed. Animal and human bites introduce dozens of bacterial species deep into tissue. Closing the wound traps bacteria inside, virtually guaranteeing a severe infection or abscess. Clean thoroughly, pack loosely, and allow healing from the bottom up.

Hemorrhage Control

Stop the bleeding before anything else. Blood loss kills faster than infection.

Direct Pressure

Apply firm, steady pressure with the cleanest cloth available directly over the bleeding point. Maintain pressure for a full 10 minutes without peeking — lifting the dressing disrupts clot formation. If blood soaks through, add more layers on top without removing the first.

Tourniquet Application

For severe limb bleeding that direct pressure cannot control:

1. Use a strip of cloth at least 4 cm wide (narrow strips cause nerve damage).
2. Apply 5-8 cm above the wound, never over a joint.
3. Tighten using a windlass (stick twisted through the cloth) until bleeding stops.
4. Note the exact time of application.
5. A tourniquet can stay on safely for up to 2 hours. Beyond that, limb loss risk increases significantly.

Pressure Points

If you know anatomy, pressing on the artery upstream of the wound can reduce bleeding while you prepare for surgery. Key points: femoral artery (groin crease), brachial artery (inner upper arm), radial/ulnar arteries (wrist).

Wound Packing

For deep cavity wounds where you cannot apply direct surface pressure, pack the wound tightly with clean cloth strips, pushing firmly into the deepest part first, then layering outward. This internal pressure controls bleeding from vessels you cannot see or clamp.

Debridement

Debridement — removing dead, damaged, and contaminated tissue — is the single most important step in preventing wound infection. It was the key insight that reduced surgical mortality from over 40% to under 5% in the 19th century.

Technique

1. Irrigate first with copious clean water — boiled and cooled, or purified. Use at least 500 ml per centimeter of wound length, delivered with pressure (squeeze bottle or syringe).
2. Identify dead tissue — it appears gray, black, or pale white rather than the healthy pink-red of living tissue. Dead tissue does not bleed when cut.
3. Excise systematically using a sharp, sterilized blade. Cut away all visibly dead tissue, foreign material, and crushed muscle. Healthy muscle is red, bleeds when cut, contracts when pinched, and has normal consistency.
4. Extend the wound if needed — sometimes you must enlarge the skin opening to access contaminated deeper tissues. Do not leave dead tissue behind to avoid expanding the wound.
5. Re-irrigate after debridement with another generous flush.

How Much to Remove

Be aggressive with debridement. Leaving behind even small amounts of dead tissue creates a perfect bacterial growth medium. The wound will heal from healthy tissue borders. Insufficient debridement is the most common cause of wound infection in field surgery.

Suturing Techniques

Once a wound is clean, debrided, and not actively bleeding, you must decide whether to close it.

When to Close (Primary Closure)

• Clean, sharp wounds less than 6 hours old
• Wounds on the face or scalp (good blood supply)
• Surgical incisions you made yourself under sterile conditions

When NOT to Close

• Wounds more than 12 hours old
• Bite wounds (animal or human)
• Heavily contaminated wounds
• Crush injuries with significant tissue death
• Wounds where you could not fully debride

Suture Materials

Material	Source	Best For
Silk thread	Silkworm cocoons, unraveled fabric	General wound closure
Linen thread	Flax fiber, finely spun	Strong closure, slow absorption
Gut suture	Sheep/goat intestine, cleaned and twisted	Internal layers, absorbs in 7-10 days
Hair	Horse mane/tail hair	Fine skin closure on face
Plant fiber	Nettle, hemp, ramie — finely processed	Emergency when nothing else available

Needle: A curved sewing needle works. Ideally forge a half-circle needle with a cutting edge from steel wire. Sterilize by boiling for 20 minutes or holding in a flame until red-hot, then cooling.

Simple Interrupted Suture

The workhorse technique for most wound closures:

1. Enter the skin 5-8 mm from the wound edge, perpendicular to the surface.
2. Pass through the full thickness of skin on one side.
3. Cross the wound gap at the deepest level.
4. Exit through the full thickness on the opposite side, 5-8 mm from the edge.
5. Tie with a square knot (right over left, then left over right) — snug but not tight enough to blanch the skin.
6. Space sutures 5-10 mm apart along the wound.

Mattress Sutures

For wounds under tension or where wound edges tend to invert:

• Vertical mattress: Enter far from the edge, exit near the edge on the opposite side, then reverse — enter near the edge and exit far. Provides excellent eversion.
• Horizontal mattress: Run parallel to the wound edge on each pass. Best for high-tension areas like over joints.

Drain Placement

Some wounds produce fluid that must escape. Trapped fluid becomes an abscess.

When to Drain

• Wounds closed over deep spaces
• Abscess cavities after drainage
• Wounds with ongoing oozing
• Any wound where you are uncertain about contamination

Drain Construction

1. Cut a strip of clean cloth 1-2 cm wide, or use a hollow reed or thin bamboo tube.
2. Place one end deep in the wound cavity.
3. Bring the other end out through the lowest point of the wound (gravity assists drainage).
4. Secure with a single suture through the skin only, not the drain itself.
5. Cover with a loose dressing.
6. Remove the drain when output drops to minimal — usually 2-4 days.

Wound Dressings and Aftercare

Dressing Principles

• Non-adherent inner layer — smear clean animal fat, beeswax, or honey on the cloth that contacts the wound to prevent it from sticking to healing tissue.
• Absorbent middle layer — clean cotton, linen, or moss to absorb drainage.
• Securing outer layer — bandage wrap to hold everything in place.

Dressing Changes

Timeline	Action
First 48 hours	Leave dressing undisturbed unless soaked through
Day 2-3	First dressing change — inspect for infection signs
Day 3-7	Change daily, irrigate with clean water at each change
Day 7-10	Remove sutures if wound edges are well-healed
Day 10-14	Remove sutures from high-tension areas (joints, back)

Signs of Infection

Watch for: increasing redness spreading beyond wound edges, warmth, swelling, pus (yellow/green discharge), fever, red streaks running from the wound toward the body (lymphangitis — an emergency requiring immediate wound opening and drainage).

Red Streaks = Emergency

Red lines running from a wound toward the heart indicate infection spreading through the lymphatic system. This can progress to sepsis within hours. Open the wound immediately, irrigate aggressively, apply hot compresses, and administer any available antimicrobial (honey, garlic poultice, or antibiotic if available).

Common Mistakes

1. Closing contaminated wounds — the desire to “fix” a wound by suturing it shut is strong, but closing a dirty wound traps bacteria inside and creates a life-threatening abscess. When in doubt, leave it open.
2. Inadequate irrigation — a quick rinse is not enough. Use at least 500 ml of clean water per centimeter of wound, delivered with pressure. More is better.
3. Suturing too tightly — stitches that blanch the skin cut off blood supply to the wound edges, causing the tissue to die and the wound to fall apart. Tie snugly, not tightly.
4. Removing the tourniquet too quickly — releasing a tourniquet dumps toxins from ischemic tissue into the bloodstream. Release slowly and be prepared for a blood pressure drop.
5. Ignoring tetanus risk — any wound contaminated with soil, rust, or animal feces carries tetanus risk. In a rebuilding world, this is often fatal. Clean wounds aggressively and watch for jaw stiffness 3-21 days post-injury.

Summary

Wound Surgery — At a Glance

• Assess the whole patient before the wound — airway, breathing, and circulation come first
• Stop bleeding with direct pressure, wound packing, or tourniquet as needed
• Debride aggressively — removing all dead tissue is the single most important infection prevention step
• Close clean wounds less than 6 hours old; leave contaminated, bite, and crush wounds open
• Use simple interrupted sutures as your standard technique, with gut for internal layers and silk/linen for skin
• Place drains in wounds with deep spaces or ongoing fluid production
• Change dressings starting at 48 hours, watching carefully for infection signs
• Red streaks from a wound are an emergency requiring immediate action