Cardiovascular Medicine Book

Vitals

Dermatology

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Allen Test

Aka: Allen Test, Allen's Test, Wrist Collateral Circulation
  1. Epidemiology
    1. Inadequate collateral flow in 3% hospitalized patients
  2. Causes of Inadequate Ulnar Circulation
    1. Normal anatomic variant
    2. Hypothenar Hammer Syndrome
  3. Indications
    1. Test wrist collateral Blood Flow
    2. Arterial Puncture for Arterial Blood Gas
  4. Technique
    1. Patient elevates hand and makes a fist for 20 seconds
    2. Firm pressure held against radial and ulnar arteries
    3. Patient opens hand and should blanche white
    4. Examiner releases only ulnar compression
  5. Normal Result
    1. Hand color flushes within 5 to 7 seconds
  6. Abnormal result: Inadequate collateral circulation
    1. Hand remains white until radial pressure released
    2. Risk of serious hand ischemia if radial vessel spasm
  7. Alternative means for assessing collateral circulation
    1. Doppler Ultrasound
    2. Finger plethysmography

Allen test (C0231664)

Concepts Diagnostic Procedure (T060)
SnomedCT 57888003
Italian Test di Allen
Japanese アレン試験, アレンシケン
English Allen's test (physical finding), Allen test, allen's test, Allen's test, Allen's test (procedure)
Czech Allenův test
Hungarian Allen vizsgálat
Spanish prueba de Allen (procedimiento), prueba de Allen, Prueba de Allen
Portuguese Teste de Allen
Dutch Allen-test
French Test d'Allen
German Allen-Test
Sources
Derived from the NIH UMLS (Unified Medical Language System)


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