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Article
June 5, 1954

SIMPLE METHOD OF DEMONSTRATING THE L. E. CELL BY FINGER PUNCTURE

Author Affiliations

Brooklyn

From the departments of medicine and hematology, Jewish Hospital of Brooklyn.

JAMA. 1954;155(6):568-569. doi:10.1001/jama.1954.73690240002010a
Abstract

A simple method of demonstrating the L. E. cell, the diagnostic cell in lupus erythematosus, by finger puncture is presented in this preliminary report. This method takes advantage of the modern refinements in technique for demonstrating the L. E. cell, namely, the use of clotted blood1 and a suitable incubation period.2 Its chief aim is to make the test available to the general practitioner, the internist, or the dermatologist without the special equipment of a laboratory.

METHOD  The finger is punctured in the usual manner as for the making of blood smears and about 10 drops of blood are collected in a small test tube. The tube we use is about 75 mm. in length and has an internal diameter of 7.5 mm. In such a tube 10 drops of blood would measure about 1/4 in. The blood is allowed to clot at room temperature for four to

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