Nursing Field Notes / Musculoskeletal · Med-Surg Course

Amputations 🦿

Below- & Above-Knee Limb Loss — Perioperative & Residual Limb Care

NG-174 Musculoskeletal ADHD-friendly visual edition

Amputation = surgical removal of a limb, most often for peripheral arterial disease & diabetic gangrene that no longer has enough blood flow to heal. The nurse's job splits into three windows: before (vascular status, prep), right after (bleeding, pain as a red flag, positioning), and rehab/home (residual limb shaping, phantom pain, contracture prevention). Positioning is the single most tested piece — get it right for the first 24 hours, then get it right for every day after that.

📄 Simple Nursing original — opens in Drive →

🦵 BKA > AKABelow-knee is the most tested level — better circulation & healing to the residual limb, keeps the knee joint.

⏫ 24 hours, then STOPElevate on a pillow to cut edema for the first 24h only — after that, elevation causes contracture.

👻 Phantom limb pain is REALA genuine neurological phenomenon from cut nerve endings & cortical remapping — never dismiss it as "in their head."

🚨 Persistent/worsening painat the operative site immediately post-op = priority — think hemorrhage or ischemia, not "normal" surgical pain.

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BEFORE

STEP 1 · WHY & WHERE

Amputation is almost always a circulation problem first — knowing the "why" explains every choice that follows.

🦵 The two levels — and why the exam always picks BKA

KAPLAN LOGIC A client with type 1 diabetes gets a right BKA for gangrenous toes and asks why it's "so extensive." The answer: a below-the-knee amputation results in better circulation and healing than trying to save more distal, poorly-perfused tissue.

🧠 "B for Better, B for Below." BKA keeps the knee AND gets better blood flow to the cut edge — it's the level surgeons reach for whenever the vasculature allows it.

⚠️ Who ends up here — causes & risk factors

🩸 Peripheral arterial disease (PAD) — poor blood flow to the limb
🍬 Diabetes mellitus — the classic exam scenario: sugary blood → poor healing → infection → gangrene
🦠 Severe/uncontrolled infection that won't clear with antibiotics or debridement
💥 Trauma — crush injury, severe burns, frostbite
🎗️ Malignant bone tumor (e.g., osteosarcoma)

🧠 "Sugar can't heal what it can't feed." Diabetes damages small vessels first — that's why toes go before the whole foot, and the whole foot before the whole leg.

🖐️ Pre-op vascular assessment — the same 6 P's

Before surgery, the nurse documents baseline circulation, motion & sensation distal to the planned incision using the same neurovascular check covered on the Fracture page in this series.

Check	What it tells you
Pain, Pallor, Pulselessness	Circulation to the limb
Paresthesia, Paralysis	Nerve function
Poikilothermia (temp change)	Perfusion / skin viability

🧠 See NG-056 Fracture for the full 6 P's breakdown — it's one skill reused across every orthopedic page.

💬 Psychosocial prep — grieving a body part before it's gone

Limb loss triggers a real grief response — anticipate anger, denial, depression before & after surgery. Assess body image, involve the client in decisions, and set the expectation early that phantom limb sensations are normal so the client isn't blindsided by them later.

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RIGHT AFTER

STEP 2 · THE FIRST 24–48 HOURS

Immediately post-op, the nurse is hunting for bleeding and watching how pain behaves — not just treating pain.

🚨 Priority concern: pain that persists or climbs at the operative site

KAPLAN LOGIC Immediately following a right BKA, the nurse is most concerned when the client reports persistent pain at the operative site — not routine surgical soreness that responds to analgesia. Persistent or worsening pain is the earliest clue to hemorrhage, hematoma, or impaired circulation to the residual limb.

🩹 Assess the dressing frequently — note any increase in drainage, and mark & time the outline of new bleeding
🔧 Keep a large clamp or tourniquet at the bedside for the first 24 hours in case of sudden hemorrhage — standard trauma/ortho precaution
🌡️ Also assess for expected findings: redness & irritation at the incision are watched, but escalating pain out of proportion is the priority red flag

🧠 "Pain that won't quit didn't just cut." Ordinary incisional pain trends down with meds. Pain that keeps climbing means something is still actively going wrong underneath the dressing.

⏫ Positioning, part 1: elevate for 24 hours only

Elevating the residual limb on a pillow for the first 24 hours reduces post-op edema. This is time-limited on purpose — continue to the next card.

🩹 Dressing & drain care

Rigid or soft compression dressing shapes the residual limb & controls edema
Monitor a surgical drain (if present) for amount & character of output
A dressing that hasn't been changed/dated appropriately (e.g., dated two days prior with no reassessment) is a finding the nurse should intervene on, not ignore

🧠 An old, unassessed dressing hides new bleeding — always know when it was last checked.

🩹

REHAB & HOME

STEP 3 · SHAPE, PROTECT, TEACH

Once bleeding risk passes, the whole game shifts to preventing contractures, shaping the limb for a prosthesis, and validating phantom pain.

❌ NEVER: prolonged elevation or keeping the limb flexed

Do not elevate the residual limb past the first 24 hours and do not let it rest flexed against pillows. Both habits shorten the hip or knee flexors, and the client ends up with a permanent hip or knee flexion contracture that can make an eventual prosthesis impossible to use.

30 min, 3x/day hip stretched flat → no contracture

🧠 "Lie on your belly, keep your hip healthy." Prone (stomach-lying) for 30 minutes, 3 times a day actively stretches the hip flexors — teach the client to push the residual limb down into the mattress while prone for extra stretch.

✅ Residual limb ("stump") daily care

🧼 Wash daily with soap & water; dry thoroughly

🌬️ Expose to air part of the day rather than always covered

🪞 Inspect skin daily with a mirror — look for redness, breakdown, blisters

🛏️ After the first 24h, keep the limb flat and fully extended (not propped up on pillows, not left hanging down) to prevent contracture

🧠 "Clean, dry, exposed to air." Trapped moisture under a wrap all day breaks down skin before it ever gets to try a prosthesis.

🩹 Wrapping/shrinker technique — shaping for a prosthesis

An elastic bandage or shrinker sock applied in a figure-8 pattern with even, decreasing distal-to-proximal pressure shapes the residual limb into a cone for a future prosthesis. Circular wrapping is never used — it constricts like a tourniquet and cuts off circulation.

👻 Phantom limb pain — real, neurological, not psychological

Phantom limb sensation/pain is a genuine neurological event — cut peripheral nerves keep firing, and the brain's cortical map for that limb hasn't updated yet. It is not a psychological complaint and should never be dismissed as "not real."

💊 Managed with gabapentin/pregabalin, sometimes low-dose antidepressants or opioids for breakthrough pain
🪞 Mirror therapy — client watches the reflection of the intact limb moving to "retrain" the brain
⚡ TENS unit, massage, and early prosthetic use can reduce frequency
🗣️ Validate it. Telling the client it's "just in their head" damages trust and delays treatment of a real pain source

🧠 "The nerves didn't get the memo." The limb is gone, but the wiring to the brain is still live — that live wire is what fires as phantom pain.

📊 BKA vs AKA at a glance

Feature	Below-Knee (BKA)	Above-Knee (AKA)
Circulation to the cut edge	Better — most tested choice	Used when BKA vasculature won't support it
Knee joint	Preserved	Removed
Energy to walk w/ prosthesis	Lower	Higher — more energy expenditure
Contracture risk to prevent	Knee flexion	Hip flexion

⚡

QUICK RECALL

SAY IT OUT LOUD

🦵 BKA = better circulationmost tested rationale for level choice

🚨 Escalating op-site pain= priority — think hemorrhage, not routine soreness

⏫ Elevate 24h, then STOPprone 30 min x3/day to prevent flexion contracture

👻 Phantom pain is realnever dismiss it as psychological

🎯 Cover & check — 4 rapid-fire questions

Q1: Why is a below-knee amputation preferred over above-knee whenever possible?

It results in better circulation and healing to the residual limb, and it preserves the knee joint, which lowers the energy cost of walking with a prosthesis.

Q2: A client is 12 hours post-op right BKA and reports persistent, worsening pain at the operative site. What is the nurse most concerned about?

Hemorrhage or impaired circulation to the residual limb — this is not expected post-op soreness and should be reported immediately.

Q3: How long should the residual limb be elevated after surgery, and what happens if elevation continues too long?

Elevate on a pillow for the first 24 hours only to reduce edema. Continued elevation/flexion promotes a hip or knee flexion contracture — prone positioning 30 minutes, 3 times a day, helps prevent it.

Q4: A client says the pain in their amputated leg feels completely real. How should the nurse respond?

Validate it — phantom limb pain is a genuine neurological phenomenon from cut nerve endings and the brain's unchanged sensory map, not a psychological complaint.

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STUDY SHEETS

FROM YOUR SAVED SET

Amputation care start to finish — indications, post-op assessment, positioning, phantom limb pain, rehabilitation, and the STUMP memory trick. — swipe it sideways if it is cut off, or tap to open it full size.

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