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Wright's test is a clinical sign in which the radial pulse weakens or disappears when the arm is abducted and externally rotated. [ 1 ] [ 2 ] It occurs in some patients with thoracic outlet syndrome .
Wright's stain is a hematologic stain that facilitates the differentiation of blood cell types. It is classically a mixture of eosin (red) and methylene blue dyes. It is used primarily to stain peripheral blood smears , urine samples, and bone marrow aspirates , which are examined under a light microscope .
It was named for Edgar Van Nuys Allen, who described the original version of the test in 1942. [1] An altered test, first suggested by Irving S Wright in 1952, has almost universally replaced the original method in contemporary medical practice. The alternative method is often referred to as the modified Allen's test or modified Allen test. [2]
The patient is placed in a sitting position, hands resting on thighs. The examiner palpates radial pulse on side being tested; Patient actively rotates head to ipsilateral side being tested while the examiner laterally rotates and extends the patient's shoulder
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[1] [2] [3] The Diff-Quik procedure is based on a modification of the Wright-Giemsa stain pioneered by Harleco in the 1970s, [1] and has advantages over the routine Wright-Giemsa staining technique in that it reduces the 4-minute process into a much shorter operation and allows for selective increased eosinophilic or basophilic staining ...
Blood smear examination is usually performed in conjunction with a complete blood count in order to investigate abnormal results or confirm results that the automated analyzer has flagged as unreliable. [3] Microscopic examination of the shape, size, and coloration of red blood cells is useful for determining the cause of anemia.
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