Traction test

The traction test (synonym: tweezers pull test ) is a method used in ophthalmology to test the so-called passive mobility of an eye . As a differential diagnostic measure, it provides information on whether an existing restriction of movement is due to eye muscle paralysis or whether it is the result of mechanically or structurally related disorders ( pseudoparesis ). These occur especially in the orbital floor fracture and Brown syndrome . In addition, in the case of long-lasting paresis, they can be an expression of fibrotic secondary changes in the equilateral (ipsilateral) antagonist or, in the course of endocrine orbitopathy, they can be the result of inflammatory tissue changes.

The traction test is carried out in local anesthesia or during a squint operation under general anesthesia with suitable forceps . With it, the eye is passively rotated in the plane in which there is a disturbance. If it can move freely, the test is negative . If, on the other hand, a mechanical resistance is noticeable that prevents free rotation, this is referred to as a positive test result. As a rule, there is no concrete quantification, but it can be estimated in degrees or millimeters how far a movement is possible in a specified direction starting from a certain reference point (usually the primary position ). The result of the traction test can influence further treatment measures, especially surgical ones.

The traction test can also be used to clarify the risk of possible postoperative double vision before a squint operation .

See also

• Electromyography

Individual evidence

1. ↑ About symptoms, treatment and course of the isolated orbital floor fracture. From "Graefe's Archive for Clinical and Experimental Ophthalmology", Springer Verlag - Berlin / Heidelberg
2. ^ Albert J. Augustin: Ophthalmology . Springer, Berlin, Heidelberg 2007, ISBN 978-3-540-30455-5 , pp. 131 ( limited preview in Google Book search).

literature

• Herbert Kaufmann: Strabismus. With the collaboration of W. de Decker et al., 3rd edition, Georg Thieme Verlag, 2003, ISBN 3-13-129723-9
• Axenfeld / Pau: textbook and atlas of ophthalmology . With the collaboration of R. Sachsenweger et al., Stuttgart: Gustav Fischer Verlag, 1980, ISBN 3-437-00255-4
• Rudolf Sachsenweger: Neuroophthalmology . Thieme Verlag, Stuttgart; 3rd edition, (January 1983); ISBN 978-3-13-531003-9

This article is about a health issue. It is not used for self-diagnosis and does not replace a diagnosis by a doctor. Please note the information on health issues !