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- Title
Comparative analysis of Allen's test with modified Allen's test and its clinical importance.
- Authors
Sivaharini, S.; Babu, K. Yuvaraj; Mohanraj, Karthik Ganesh
- Abstract
Introduction: The Allen test is a widely used screening method of hand circulation. The circulation of the hand is supported by two main arteries, ulnar artery and radial artery. Allen's test is also used to assess the adequacy of ulnar collateral circulation to the hand. Allen first described his test in 1929 but did not indicate a time period after which a test should be deemed positive. The aim of the study is to compare the Allen's test with modified Allen's test (MAT) and to correlate with its clinical importance. Materials and Methods: Allen's test is performed by asking the subject to clench each fist tightly for 1 min at constant time, pressure is applied and the subject is asked to open the fingers, and the examiner compares the color of each hand. In MAT, the patient's hand is elevated and also the person is asked to clench their fist for a minimum of 30 s, pressure is applied. Still elevated, the hand is then opened. It ought to seem blanched and the color will return within 5-15 s. Results: Although there was no specific difference found between the Allen's test and the MAT, the resulting feature of these tests reveals the collateral circulation of the radial artery can be assessed by the MAT which might be helpful in several clinical examinations. Conclusion: The Allen test is a sensible and valid screening test for the circulation of the hand. Thus, if the blood supply from one of the arteries is stopped, the other arteries will provide adequate blood to the hand. A minority of individuals lack this dual blood supply.
- Subjects
COLLATERAL circulation; RADIAL artery; REVASCULARIZATION (Surgery); THROMBOSIS; ULNAR artery
- Publication
Drug Invention Today, 2018, Vol 10, Issue 10, p1936
- ISSN
0975-7619
- Publication type
Article