Acute Limb Ischemia

in Lower Extremity Arterial Disease

Applied

Type

Addition

Confidence

95%

Created

Mar 26, 2026

Evidence

2 sources

Rationale

The section was updated to reflect modern endovascular techniques (ET vs CDT) for ALI management based on a 2026 meta-analysis. Additionally, a specific mention of pediatric ALI was added to broaden the textbook's scope, as pediatric management differs significantly from adult protocols. All abbreviations were expanded on first use as per instructions, and the existing table and citations were preserved.

Evidence

Meyer J et al. A systematic review of the management of acute limb ischemia in children. Journal of Vascular Surgery. 2026. PMID: 41866093.
Verified source
PubMedDOI
Kusumowardani AR et al. Endovascular Thrombectomy or Catheter-Directed Thrombolysis for Acute Limb Ischemia: Insights From a Systematic Review and Meta-Analysis. Journal of Endovascular Therapy. 2026. PMID: 41877595.
Verified source
PubMedDOI

Content Changes

* **Classic presentation—the 6 Ps:** Pain, Pallor, Pulselessness, Paresthesia, Paralysis, and Poikilothermia (coolness).[@rutherford2018-rutherford](coolness) [@rutherford2018-rutherford]. Motor and sensory deficits indicate advanced ischemia requiring urgent intervention.
* **Immediate management:** Systemic anticoagulation with intravenous unfractionated heparin (UFH) (unless contraindicated) should be initiated immediately to prevent thrombus propagation. Severity staging using the Rutherford classification (I–III) guides treatment urgency. **Catheter-directed thrombolysis**thrombolysis is(CDT)** or **endovascular thrombectomy (ET)** are appropriate for Rutherford I–IIa (viable or marginally threatened limb without motor deficit). Recent meta-analyses indicate that ET provides comparable limb salvage rates to CDT while potentially reducing procedural time and bleeding risks [@kusumowardani2026]. **Rutherford IIb** (immediately threatened limb with motor deficit) requires emergent surgical or endovascular revascularization within hours to prevent irreversible tissue loss. **Rutherford III** (irreversible ischemia with rigor and fixed mottling) contraindicates revascularization due to futility and high risk of reperfusion injury, compartment syndrome, and systemic complications [@ahaacc2016]. In pediatric populations, management of acute limb ischemia (ALI) requires specialized consideration of vessel size and etiology, with a focus on anticoagulation and tailored surgical or endovascular approaches [@meyer2026].

<!-- type: classification -->
**Rutherford ALI Classification**

| **Class** | **Description** | **Sensory Loss** | **Motor Deficit** | **Management** |
| --- | --- | --- | --- | --- |
| I | Viable | None | None | Elective revascularization |
| IIa | Marginally threatened | Minimal (toes) | None | Urgent revascularization |
| IIb | Immediately threatened | Beyond toes | Mild-moderate | Emergent revascularization |
| III | Irreversible | Profound, anesthetic | Paralysis (rigor) | Primary amputation |
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