Suspected Acute Limb Ischemia
Sudden decrease in limb perfusion threatening viability
All Pathways
Vascular SurgeryEmergency
Acute Limb Ischemia Management (ESVS 2020)
Acute Limb Ischemia Management (ESVS 2020): Suspected Acute Limb Ischemia → Immediate Clinical Assessment → Immediate Anticoagulation → Rutherford Class...
Pathway Overview
18 steps
Algorithm Steps
18 total
01Start 02Action Immediate Clinical Assessment
The 6 Ps of Acute Limb Ischemia
- Pain - sudden, severe
- Pulselessness - absent distal pulses
- Pallor - pale/mottled skin
- Perishing cold - cold to touch
- Paresthesia - sensory loss
- Paralysis - motor loss (late, ominous)
03Action Immediate Anticoagulation
UFH unless contraindicated
- UFH 5000 IU bolus IV
- Then infusion targeting aPTT 2-2.5x control
- Prevents clot propagation
- Continue until definitive treatment
- DO NOT DELAY for imaging
04Decision Rutherford Classification
Determines treatment urgency
- I: Viable - no immediate threat
- IIa: Marginally threatened - salvageable if treated promptly
- IIb: Immediately threatened - salvageable with immediate revascularization
- III: Irreversible - major tissue loss or permanent nerve damage inevitable
05Action Class I: Viable
No sensory or motor deficit
- Capillary refill intact
- Audible arterial Doppler signals
- No immediate limb threat
- Time for full evaluation
- Anticoagulate and investigate
06Decision Etiology Assessment
Embolic vs Thrombotic
- Embolic: AF, recent MI, prosthetic valve, sudden onset, no claudication hx
- Thrombotic: PAD history, claudication, prior intervention, subacute
- Affects treatment strategy and prognosis
07Action Surgical Embolectomy
First-line for embolic ALI
- Fogarty balloon catheter embolectomy
- Groin or popliteal approach
- Local or general anesthesia
- Intraoperative angiography/completion imaging
- Consider fasciotomy prophylactically
08Action Post-Revascularization Care
Critical monitoring period
- Monitor for compartment syndrome (4 compartment pressures >30mmHg = fasciotomy)
- Reperfusion injury: rhabdomyolysis, hyperkalemia, acidosis
- Continue anticoagulation
- Serial pulse checks/ABI
- Hydration to prevent AKI from myoglobin
09Action Secondary Prevention
Address underlying cause
- Embolic: anticoagulation, echo, AF management
- Thrombotic: antiplatelet, statin, risk factor modification
- Hypercoagulable workup if indicated
- Smoking cessation
- Surveillance imaging
10Outcome Limb Salvage
Successful revascularization - 75-90% for Class I-IIa, lower for IIb
11Outcome Amputation
10-30% overall; 100% for Class III; consider quality of life
12Action Endovascular Treatment
CDT or mechanical thrombectomy
- Catheter-directed thrombolysis (CDT)
- tPA or urokinase infusion
- Mechanical thrombectomy devices
- Better for thrombotic/graft occlusions
- Requires ICU monitoring during CDT
- Path rejoins step 08Shared downstream outcome
13Action Open Surgical Bypass
For thrombosis with extensive disease
- Bypass with vein or prosthetic graft
- Combined with thrombectomy
- Indicated for native vessel thrombosis
- May combine with endovascular
- Higher complexity, longer recovery
- Path rejoins step 08Shared downstream outcome
14Action Class IIa: Marginally Threatened
Minimal sensory loss (toes)
- No muscle weakness
- Inaudible arterial Doppler
- Venous Doppler audible
- Salvageable if treated promptly
- Hours to intervene
- Path rejoins step 06Shared downstream outcome
15Warning Class IIb: Immediately Threatened
Rest pain, sensory loss beyond toes, mild-moderate motor deficit
- Inaudible arterial Doppler
- Venous Doppler often inaudible
- REQUIRES IMMEDIATE REVASCULARIZATION
- Target <6 hours to revascularization
- Highest priority
- Path rejoins step 07Shared downstream outcome
- Path rejoins step 12Shared downstream outcome
16Warning Class III: Irreversible
Profound sensory and motor loss, muscle rigor
- Anesthetic limb
- Complete paralysis
- No Doppler signals
- Skin marbling, muscle rigidity
- Revascularization contraindicated - primary amputation
17Warning Primary Amputation
For irreversible ischemia (Class III)
- Indicated when limb non-viable
- Prevents reperfusion syndrome/MODS
- Level determined by tissue viability
- Life over limb in unstable patients
- Early palliative care consultation
- Path rejoins step 11Shared downstream outcome
18Action Imaging (If Time Permits)
CTA preferred - do not delay treatment
- CTA: gold standard for anatomy
- Duplex if CTA unavailable
- Shows level of occlusion
- Identifies embolic vs thrombotic cause
- Skip if Rutherford IIb - go to OR
- Path rejoins step 04Shared downstream outcome
Guideline Source
ESVS 2020 Clinical Practice Guidelines on the Management of Acute Limb Ischaemia
Clinical Safety Information
Clinical Decision Support — Not a Substitute for Clinical Judgment
Individual patient factors may require deviation from these recommendations.
Known Limitations
- Time-critical emergency - revascularization within 6 hours optimal for IIb
- Requires immediate vascular surgery consultation
- CTA may delay treatment in obvious cases - clinical assessment paramount
- Compartment syndrome monitoring essential post-revascularization
- Does not cover blue toe syndrome or microembolization in detail
Applicable Regions
USEUGlobal
EU: ESVS 2020 is current standard of care
US: SVS guidelines align with ESVS principles
Version 1Next review: 2027-01-01
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Related Resources
Frequently Asked Questions
What is the Acute Limb Ischemia Management (ESVS 2020)?
The Acute Limb Ischemia Management (ESVS 2020) is a emergency clinical algorithm for Vascular Surgery. It provides a structured decision tree to guide clinical decision-making, based on ESVS 2020 Clinical Practice Guidelines on the Management of Acute Limb Ischaemia.
What guideline is the Acute Limb Ischemia Management (ESVS 2020) based on?
This algorithm is based on ESVS 2020 Clinical Practice Guidelines on the Management of Acute Limb Ischaemia (DOI: 10.1016/j.ejvs.2019.09.006).
What are the limitations of the Acute Limb Ischemia Management (ESVS 2020)?
Known limitations include: Time-critical emergency - revascularization within 6 hours optimal for IIb; Requires immediate vascular surgery consultation; CTA may delay treatment in obvious cases - clinical assessment paramount; Compartment syndrome monitoring essential post-revascularization; Does not cover blue toe syndrome or microembolization in detail. Individual patient factors may require deviation from these recommendations.
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