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Acute Limb Ischemia and Leg PainAPPROACH

CHEST AND CARDIOVASCULAR · 19 SECTIONS

⚲

486 items

☷ Legend

⚲

Resuscitation and Universal Approaches9▾

Chest and Cardiovascular12▾

Pacemaker And Icd Related Presentations Acute Limb Ischemia And Leg Pain Suspected Deep Vein Thrombosis Symptoms Hypertension Chest Pain Palpitations And Tachyarrhythmia Symptoms Bradycardia Symptoms Syncope And Presyncope Syncope With Neurologic Concern Unilateral Leg Swelling Bilateral Leg Swelling Calf Pain And Swelling

Respiratory11▾

Abdominal and Gastrointestinal24▾

Renal and Urinary7▾

Neurologic11▾

Back and Neck8▾

Women's Health, Pregnancy, and GU11▾

Infectious Disease and Fever Syndromes11▾

Allergy and Dermatology7▾

Musculoskeletal and Extremities14▾

Trauma and Wounds14▾

ENT, Eye, Dental10▾

Endocrine, Metabolic, and Abnormal Labs9▾

Toxicology and Behavioral14▾

Pediatrics16▾

Environmental and Exposure4▾

01History/hx54

Presenting complaint

›Symptom profile

›Leg pain

›Suspected acute limb ischemia symptoms

›Unilateral leg coldness

›Foot or toe discoloration

OPQRST

›Onset

›Exact time last known well

›Sudden onset

›Gradual onset

›Provocation and palliation

›Worse with exertion

›Worse with elevation

›Relief with dependency

›No relief with rest

›Quality

›Pain

›Numbness

›Cramping

›Burning

›Region and radiation

›Foot

›Calf

›Thigh

›Buttock

›Severity

›Severe pain out of proportion

02Alarm Features/alarm22

Immediate limb threat

›Threatened limb features

›Sensory loss

›Motor weakness

›Absent Doppler arterial signal

›Mottling

System danger thresholds

›Vital sign danger

›Hypotension

›Persistent tachycardia

›Hypoxia

High risk historical triggers

›Embolic source concern

›Atrial fibrillation

›Recent myocardial infarction

›Known ventricular thrombus

›Aortic catastrophe concern

›Sudden severe back pain

›Migratory pain

›Pulse deficit in multiple territories

Escalation triggers

›Immediate escalation

›Paralysis

›Rapidly progressive neurologic deficit

›Compartment syndrome concern

›Sepsis physiology with limb findings

03Medications/meds21

Medication reconciliation

›Current medications

›Anticoagulants

›Antiplatelets

›Statins

›Rate control agents

›Recent changes

›Anticoagulant interruption

›Missed doses

›New vasoconstrictors

High risk medication considerations

›Bleeding risk modifiers

›Dual antiplatelet therapy

›Warfarin

›DOAC use

›Heparin considerations

›History of heparin induced thrombocytopenia

›Active bleeding

›Recent high risk surgery

Analgesics and sedation exposures

›Pre ED analgesics

›NSAID use

›Opioid use

›Acetaminophen use

04Diet/diet13

Intake and hydration

›Recent intake pattern

›Poor oral intake

›Vomiting

›Diarrhea

›Dehydration markers

›Reduced urine output

›Orthostasis

Exposures

›Stimulants

›Caffeine excess

›Energy drinks

›Alcohol

›Recent heavy use

›Withdrawal risk

05Review of Systems/ros21

Vascular and limb

›Limb focused symptoms

›Cold extremity

›Color change

›Ulceration

›Swelling

Cardiopulmonary

›Cardiac symptoms

›Palpitations

›Chest pain

›Syncope

›Respiratory symptoms

›Dyspnea

›Pleuritic pain

Infectious and inflammatory

›Infection indicators

›Fever

›Chills

›Skin redness

›Wound drainage

Neurologic

›Neuro symptoms

›New focal weakness

›New sensory loss

›Back pain with neurologic changes

06Collateral History and Family History/chafh15

Collateral

›Source and reliability

›EMS report

›Family report

›Nursing home documentation

›Last known well details

›Time last seen normal

›Baseline ambulation

Family history

›Vascular and thrombosis history

›Early coronary disease

›Peripheral artery disease

›Inherited thrombophilia history

Exposure context

›Household and community

›Sick contacts

›Recent travel

›Immobilization context

07Risk Factors/rf24

Arterial thrombosis and embolism

›Embolic risk factors

›Atrial fibrillation

›Mechanical valve

›Recent myocardial infarction

›Cardiomyopathy

›Atherosclerotic disease

›Known peripheral artery disease (I73.9)

›Prior limb revascularization

›Prior amputation

Hypercoagulability

›Thrombosis risks

›Active cancer

›Estrogen therapy

›Pregnancy and postpartum

›Prior venous thromboembolism (I82.90)

Vascular device and procedure

›Iatrogenic risks

›Recent arterial line

›Recent catheterization

›Vascular graft

›Stent

Trauma and external

›Local risks

›Fracture

›Crush injury

›Tight cast or dressing

›Prolonged limb compression

08Differential Diagnosis/ddx50

Life threatening

›Acute limb ischemia (I74.9)

›Sudden pain

›Pulselessness

›Neurologic deficit

›Acute aortic syndrome with limb malperfusion (I71.0)

›Back or chest pain

›Pulse deficits in multiple beds

›Hypotension

›Compartment syndrome (T79.A0)

›Pain out of proportion

›Pain with passive stretch

›Tense compartments

›Necrotizing soft tissue infection (M72.6)

›Severe pain

›Toxic appearance

›Rapid progression

›Septic arthritis of hip or knee (M00.9)

›Fever

›Severe joint pain

›Limited range of motion

Common

›Deep vein thrombosis (I82.409)

›Swelling

›Calf tenderness

›Risk factors for venous thrombosis

›Cellulitis (L03.11)

›Erythema

09Past Medical History/pmh17

Vascular history

›Known vascular disease

›Peripheral artery disease (I73.9)

›Prior arterial thrombosis

›Prior embolic events

›Prior interventions

›Bypass graft

›Angioplasty

›Stent placement

Cardiac sources

›Arrhythmia and structural

›Atrial fibrillation (I48.91)

›Valvular disease

›Heart failure (I50.9)

Comorbidities impacting outcomes

›Risk amplifiers

›Diabetes mellitus (E11.9)

›Chronic kidney disease (N18.9)

›Smoking history

›Hyperlipidemia (E78.5)

10Physical Exam/exam43

Initial assessment

›General and perfusion

›Toxic appearance

›Diaphoresis

›Shock features

›Pain assessment

›Pain out of proportion

›Opioid requirement trend

Limb vascular exam

›Six P features

›Pain

›Pallor

›Pulselessness

›Paresthesia

›Paralysis

›Poikilothermia

›Pulse exam

›Femoral

›Popliteal

›Dorsalis pedis

›Posterior tibial

›Doppler signals

›Arterial signal present

›Arterial signal absent

›Venous signal present

›Capillary refill and skin

›Delayed refill

›Mottling

11Lab Studies/labs23

Core labs

›Baseline and procedural readiness

›CBC

›Electrolytes

›Creatinine

›Glucose

›Perfusion and reperfusion risk

›Lactate

›Creatine kinase

›Venous blood gas

Coagulation and transfusion

›Anticoagulation planning

›INR

›aPTT

›Platelets

›Blood preparation

›Type and screen

›Crossmatch if high risk intervention

Interpretation pearls

›Limb ischemia pitfalls

›Normal lactate does not exclude acute limb ischemia

›Early CK may be normal

›Reperfusion risk markers

›Rising potassium

›Rising CK

›Metabolic acidosis trend

12Imaging/img35

Scoring Systems

›Rutherford acute limb ischemia classification

›Viable

›No sensory loss

›No motor deficit

›Audible arterial and venous Doppler

›Threatened

›Sensory loss

›Mild to severe motor deficit

›Arterial Doppler inaudible

›Irreversible

›Profound anesthesia

›Paralysis

›Major tissue loss inevitable

›ABI interpretation

›ABI less than 0.9 consistent with PAD

›ABI less than 0.4 consistent with severe ischemia

MRI

›MRI role

›Alternative diagnosis

›Spinal pathology concern

›MRI limitations

›Time delay inappropriate in threatened limb

›Implanted device compatibility constraints

›CTA aortoiliac to runoff

›Occlusion location mapping

›Embolic versus in situ thrombosis pattern

13Special Tests/spec12

Bedside vascular tests

›ABI and Doppler bedside assessment

›ABI measurement

›Segmental pressures when available

›Doppler signal interpretation

›Monophasic signal suggesting proximal disease

›No arterial signal suggesting critical ischemia

Compartment assessment

›Compartment pressure measurement

›Clinical concern with unreliable exam

›Delta pressure concern pattern

Etiology evaluation adjuncts

›Embolic source evaluation planning

›Echocardiography coordination

›Vascular imaging of contralateral limb when indicated

14ECG/ecg13

Indications and targets

›ECG utility

›Atrial fibrillation detection

›Acute ischemia pattern detection

›Hyperkalemia effects during reperfusion risk

High risk patterns

›Arrhythmia

›Atrial fibrillation with rapid ventricular response

›Ventricular ectopy

›Ischemia

›ST elevation

›Dynamic ST depression

›Electrolyte effects

›Peaked T waves

›QRS widening

15Assessment/ax21

Working diagnosis and severity

›Acute limb ischemia suspected (I74.9)

›Rutherford viable versus threatened framing

›Level of sensory deficit

›Level of motor deficit

›Alternative primary diagnosis

›DVT likely (I82.409)

›Cellulitis likely (L03.11)

›Radiculopathy likely (M54.16)

Etiology

›Embolic source likely

›Sudden onset

›Prior normal limb function

›Atrial fibrillation

›In situ thrombosis likely

›Known PAD history

›Prior claudication

›Gradual progression

Complications to rule out

›Limb and systemic complications

›Compartment syndrome

›Rhabdomyolysis

›Hyperkalemia risk after reperfusion

›Sepsis if infectious source

16Plan/plan49

First 5 minutes workflow

›Time critical pathway

›Continuous monitoring

›Two large bore IV access when threatened limb

›NPO status

›Active warming of whole patient

›Immediate escalation actions

›If motor deficit present then emergent vascular surgery consult

›If hard signs of ischemia then heparin unless contraindicated

Differential Management

›!Acute limb ischemia→›!Deep Vein Thrombosis (DVT)→›Compartment Syndrome (Forearm)→›Compartment Syndrome (Leg)→

Anticoagulation and antiplatelet

›Unfractionated heparin protocol

›IV bolus 80 units per kg

›IV infusion 18 units per kg per hour

›Titration to aPTT per local protocol dependent

›Heparin contraindications

›Active major bleeding

›Suspected intracranial hemorrhage

›Known heparin induced thrombocytopenia

›Antiplatelet therapy

›Aspirin loading if not already on and no contraindication

›Local protocol dependent for dual antiplatelet therapy after intervention

Analgesia and symptom control

›Analgesia strategy

17Disposition/dispo20

Level of care

›ICU indications

›Shock physiology

›Severe metabolic acidosis

›Hyperkalemia

›Severe reperfusion risk after prolonged ischemia

›Inpatient admission indications

›Any confirmed acute limb ischemia

›Ongoing heparin infusion

›Post revascularization monitoring need

Transfer and timing

›Transfer indications

›No local vascular capability for urgent revascularization

›Threatened limb features present

›Time sensitivity framing

›Threatened limb requires urgent revascularization pathway

›Irreversible limb features requires urgent surgical evaluation for non salvage

Discharge criteria for non ischemic leg pain

›Discharge only if ischemia excluded

›Normal pulses and Doppler signals

›Normal perfusion and capillary refill

›No neurologic deficit

›Alternative diagnosis established with safe outpatient plan

18Discharge Instructions/di18

Copy discharge instructions

›Summary

›You were evaluated for leg pain and circulation problems

›Today we did not find signs of a blocked artery in the leg

›Medications

›Take prescribed pain medicine as directed

›Avoid NSAIDs if you were told you have kidney disease or bleeding risk

›Activity

›Walk as tolerated

›Avoid prolonged immobility

›Follow up

›Primary care follow up within 2 to 3 days

›Return earlier if symptoms worsen

›Return to emergency department now if

›New numbness or weakness in the leg or foot

›The leg or foot becomes cold or pale

›New blue or purple discoloration of toes

›Severe worsening pain

›Fever with rapidly spreading redness

19References/r15

Guidelines and key sources

›Society for Vascular Surgery clinical practice guidelines for acute limb ischemia

›Year varies by update

›Local protocol dependent implementation details

›American Heart Association and American College of Cardiology guideline for management of lower extremity peripheral artery disease

›Year varies by update

›Includes antithrombotic and risk reduction recommendations

›European Society for Vascular Surgery guidelines on acute limb ischemia

›Year varies by update

›Includes Rutherford staging based pathways

›Rutherford classification for acute limb ischemia

›Viability and threat stratification framework

›Guides urgency of revascularization

›Project instructions

›Formatting and structure requirements

›Evidence based reference generator constraints

Evidence & Review

Reviewed by SymptomDx Medical Team · Last reviewed February 24, 2026

SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.

Acute Limb Ischemia and Leg PainAPPROACH

CHEST AND CARDIOVASCULAR · 19 SECTIONS

⚲

486 items

☷ Legend

⚲

Resuscitation and Universal Approaches9▾

Chest and Cardiovascular12▾

Respiratory11▾

Abdominal and Gastrointestinal24▾

Renal and Urinary7▾

Neurologic11▾

Back and Neck8▾

Women's Health, Pregnancy, and GU11▾

Infectious Disease and Fever Syndromes11▾

Allergy and Dermatology7▾

Musculoskeletal and Extremities14▾

Trauma and Wounds14▾

ENT, Eye, Dental10▾

Endocrine, Metabolic, and Abnormal Labs9▾

Toxicology and Behavioral14▾

Pediatrics16▾

Environmental and Exposure4▾

01History/hx54

Presenting complaint

›Symptom profile

›Leg pain

›Suspected acute limb ischemia symptoms

›Unilateral leg coldness

›Foot or toe discoloration

OPQRST

›Onset

›Exact time last known well

›Sudden onset

›Gradual onset

›Provocation and palliation

›Worse with exertion

›Worse with elevation

›Relief with dependency

›No relief with rest

›Quality

›Pain

›Numbness

›Cramping

›Burning

›Region and radiation

›Foot

›Calf

›Thigh

›Buttock

›Severity

›Severe pain out of proportion

02Alarm Features/alarm22

Immediate limb threat

›Threatened limb features

›Sensory loss

›Motor weakness

›Absent Doppler arterial signal

›Mottling

System danger thresholds

›Vital sign danger

›Hypotension

›Persistent tachycardia

›Hypoxia

High risk historical triggers

›Embolic source concern

›Atrial fibrillation

›Recent myocardial infarction

›Known ventricular thrombus

›Aortic catastrophe concern

›Sudden severe back pain

›Migratory pain

›Pulse deficit in multiple territories

Escalation triggers

›Immediate escalation

›Paralysis

›Rapidly progressive neurologic deficit

›Compartment syndrome concern

›Sepsis physiology with limb findings

03Medications/meds21

Medication reconciliation

›Current medications

›Anticoagulants

›Antiplatelets

›Statins

›Rate control agents

›Recent changes

›Anticoagulant interruption

›Missed doses

›New vasoconstrictors

High risk medication considerations

›Bleeding risk modifiers

›Dual antiplatelet therapy

›Warfarin

›DOAC use

›Heparin considerations

›History of heparin induced thrombocytopenia

›Active bleeding

›Recent high risk surgery

Analgesics and sedation exposures

›Pre ED analgesics

›NSAID use

›Opioid use

›Acetaminophen use

04Diet/diet13

Intake and hydration

›Recent intake pattern

›Poor oral intake

›Vomiting

›Diarrhea

›Dehydration markers

›Reduced urine output

›Orthostasis

Exposures

›Stimulants

›Caffeine excess

›Energy drinks

›Alcohol

›Recent heavy use

›Withdrawal risk

05Review of Systems/ros21

Vascular and limb

›Limb focused symptoms

›Cold extremity

›Color change

›Ulceration

›Swelling

Cardiopulmonary

›Cardiac symptoms

›Palpitations

›Chest pain

›Syncope

›Respiratory symptoms

›Dyspnea

›Pleuritic pain

Infectious and inflammatory

›Infection indicators

›Fever

›Chills

›Skin redness

›Wound drainage

Neurologic

›Neuro symptoms

›New focal weakness

›New sensory loss

›Back pain with neurologic changes

06Collateral History and Family History/chafh15

Collateral

›Source and reliability

›EMS report

›Family report

›Nursing home documentation

›Last known well details

›Time last seen normal

›Baseline ambulation

Family history

›Vascular and thrombosis history

›Early coronary disease

›Peripheral artery disease

›Inherited thrombophilia history

Exposure context

›Household and community

›Sick contacts

›Recent travel

›Immobilization context

07Risk Factors/rf24

Arterial thrombosis and embolism

›Embolic risk factors

›Atrial fibrillation

›Mechanical valve

›Recent myocardial infarction

›Cardiomyopathy

›Atherosclerotic disease

›Known peripheral artery disease (I73.9)

›Prior limb revascularization

›Prior amputation

Hypercoagulability

›Thrombosis risks

›Active cancer

›Estrogen therapy

›Pregnancy and postpartum

›Prior venous thromboembolism (I82.90)

Vascular device and procedure

›Iatrogenic risks

›Recent arterial line

›Recent catheterization

›Vascular graft

›Stent

Trauma and external

›Local risks

›Fracture

›Crush injury

›Tight cast or dressing

›Prolonged limb compression

08Differential Diagnosis/ddx50

Life threatening

›Acute limb ischemia (I74.9)

›Sudden pain

›Pulselessness

›Neurologic deficit

›Acute aortic syndrome with limb malperfusion (I71.0)

›Back or chest pain

›Pulse deficits in multiple beds

›Hypotension

›Compartment syndrome (T79.A0)

›Pain out of proportion

›Pain with passive stretch

›Tense compartments

›Necrotizing soft tissue infection (M72.6)

›Severe pain

›Toxic appearance

›Rapid progression

›Septic arthritis of hip or knee (M00.9)

›Fever

›Severe joint pain

›Limited range of motion

Common

›Deep vein thrombosis (I82.409)

›Swelling

›Calf tenderness

›Risk factors for venous thrombosis

›Cellulitis (L03.11)

›Erythema

09Past Medical History/pmh17

Vascular history

›Known vascular disease

›Peripheral artery disease (I73.9)

›Prior arterial thrombosis

›Prior embolic events

›Prior interventions

›Bypass graft

›Angioplasty

›Stent placement

Cardiac sources

›Arrhythmia and structural

›Atrial fibrillation (I48.91)

›Valvular disease

›Heart failure (I50.9)

Comorbidities impacting outcomes

›Risk amplifiers

›Diabetes mellitus (E11.9)

›Chronic kidney disease (N18.9)

›Smoking history

›Hyperlipidemia (E78.5)

10Physical Exam/exam43

Initial assessment

›General and perfusion

›Toxic appearance

›Diaphoresis

›Shock features

›Pain assessment

›Pain out of proportion

›Opioid requirement trend

Limb vascular exam

›Six P features

›Pain

›Pallor

›Pulselessness

›Paresthesia

›Paralysis

›Poikilothermia

›Pulse exam

›Femoral

›Popliteal

›Dorsalis pedis

›Posterior tibial

›Doppler signals

›Arterial signal present

›Arterial signal absent

›Venous signal present

›Capillary refill and skin

›Delayed refill

›Mottling

11Lab Studies/labs23

Core labs

›Baseline and procedural readiness

›CBC

›Electrolytes

›Creatinine

›Glucose

›Perfusion and reperfusion risk

›Lactate

›Creatine kinase

›Venous blood gas

Coagulation and transfusion

›Anticoagulation planning

›INR

›aPTT

›Platelets

›Blood preparation

›Type and screen

›Crossmatch if high risk intervention

Interpretation pearls

›Limb ischemia pitfalls

›Normal lactate does not exclude acute limb ischemia

›Early CK may be normal

›Reperfusion risk markers

›Rising potassium

›Rising CK

›Metabolic acidosis trend

12Imaging/img35

Scoring Systems

›Rutherford acute limb ischemia classification

›Viable

›No sensory loss

›No motor deficit

›Audible arterial and venous Doppler

›Threatened

›Sensory loss

›Mild to severe motor deficit

›Arterial Doppler inaudible

›Irreversible

›Profound anesthesia

›Paralysis

›Major tissue loss inevitable

›ABI interpretation

›ABI less than 0.9 consistent with PAD

›ABI less than 0.4 consistent with severe ischemia

MRI

›MRI role

›Alternative diagnosis

›Spinal pathology concern

›MRI limitations

›Time delay inappropriate in threatened limb

›Implanted device compatibility constraints

›CTA aortoiliac to runoff

›Occlusion location mapping

›Embolic versus in situ thrombosis pattern

13Special Tests/spec12

Bedside vascular tests

›ABI and Doppler bedside assessment

›ABI measurement

›Segmental pressures when available

›Doppler signal interpretation

›Monophasic signal suggesting proximal disease

›No arterial signal suggesting critical ischemia

Compartment assessment

›Compartment pressure measurement

›Clinical concern with unreliable exam

›Delta pressure concern pattern

Etiology evaluation adjuncts

›Embolic source evaluation planning

›Echocardiography coordination

›Vascular imaging of contralateral limb when indicated

14ECG/ecg13

Indications and targets

›ECG utility

›Atrial fibrillation detection

›Acute ischemia pattern detection

›Hyperkalemia effects during reperfusion risk

High risk patterns

›Arrhythmia

›Atrial fibrillation with rapid ventricular response

›Ventricular ectopy

›Ischemia

›ST elevation

›Dynamic ST depression

›Electrolyte effects

›Peaked T waves

›QRS widening

15Assessment/ax21

Working diagnosis and severity

›Acute limb ischemia suspected (I74.9)

›Rutherford viable versus threatened framing

›Level of sensory deficit

›Level of motor deficit

›Alternative primary diagnosis

›DVT likely (I82.409)

›Cellulitis likely (L03.11)

›Radiculopathy likely (M54.16)

Etiology

›Embolic source likely

›Sudden onset

›Prior normal limb function

›Atrial fibrillation

›In situ thrombosis likely

›Known PAD history

›Prior claudication

›Gradual progression

Complications to rule out

›Limb and systemic complications

›Compartment syndrome

›Rhabdomyolysis

›Hyperkalemia risk after reperfusion

›Sepsis if infectious source

16Plan/plan49

First 5 minutes workflow

›Time critical pathway

›Continuous monitoring

›Two large bore IV access when threatened limb

›NPO status

›Active warming of whole patient

›Immediate escalation actions

›If motor deficit present then emergent vascular surgery consult

›If hard signs of ischemia then heparin unless contraindicated

Differential Management

›!Acute limb ischemia→›!Deep Vein Thrombosis (DVT)→›Compartment Syndrome (Forearm)→›Compartment Syndrome (Leg)→

Anticoagulation and antiplatelet

›Unfractionated heparin protocol

›IV bolus 80 units per kg

›IV infusion 18 units per kg per hour

›Titration to aPTT per local protocol dependent

›Heparin contraindications

›Active major bleeding

›Suspected intracranial hemorrhage

›Known heparin induced thrombocytopenia

›Antiplatelet therapy

›Aspirin loading if not already on and no contraindication

›Local protocol dependent for dual antiplatelet therapy after intervention

Analgesia and symptom control

›Analgesia strategy

17Disposition/dispo20

Level of care

›ICU indications

›Shock physiology

›Severe metabolic acidosis

›Hyperkalemia

›Severe reperfusion risk after prolonged ischemia

›Inpatient admission indications

›Any confirmed acute limb ischemia

›Ongoing heparin infusion

›Post revascularization monitoring need

Transfer and timing

›Transfer indications

›No local vascular capability for urgent revascularization

›Threatened limb features present

›Time sensitivity framing

›Threatened limb requires urgent revascularization pathway

›Irreversible limb features requires urgent surgical evaluation for non salvage

Discharge criteria for non ischemic leg pain

›Discharge only if ischemia excluded

›Normal pulses and Doppler signals

›Normal perfusion and capillary refill

›No neurologic deficit

›Alternative diagnosis established with safe outpatient plan

18Discharge Instructions/di18

Copy discharge instructions

›Summary

›You were evaluated for leg pain and circulation problems

›Today we did not find signs of a blocked artery in the leg

›Medications

›Take prescribed pain medicine as directed

›Avoid NSAIDs if you were told you have kidney disease or bleeding risk

›Activity

›Walk as tolerated

›Avoid prolonged immobility

›Follow up

›Primary care follow up within 2 to 3 days

›Return earlier if symptoms worsen

›Return to emergency department now if

›New numbness or weakness in the leg or foot

›The leg or foot becomes cold or pale

›New blue or purple discoloration of toes

›Severe worsening pain

›Fever with rapidly spreading redness

19References/r15

Guidelines and key sources

›Society for Vascular Surgery clinical practice guidelines for acute limb ischemia

›Year varies by update

›Local protocol dependent implementation details

›American Heart Association and American College of Cardiology guideline for management of lower extremity peripheral artery disease

›Year varies by update

›Includes antithrombotic and risk reduction recommendations

›European Society for Vascular Surgery guidelines on acute limb ischemia

›Year varies by update

›Includes Rutherford staging based pathways

›Rutherford classification for acute limb ischemia

›Viability and threat stratification framework

›Guides urgency of revascularization

›Project instructions

›Formatting and structure requirements

›Evidence based reference generator constraints

Evidence & Review

Reviewed by SymptomDx Medical Team · Last reviewed February 24, 2026

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