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H. A. E. VAN DISHOECK, M.D.
AMSTERDAM, NETHERLANDS

From the Ear, Nose and Throat Clinic, University of Amsterdam, Dr. A. de Kleyn, director.

Arch Otolaryngol. 1941;34(3):596-602.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

The tension of the tympanic membrane and of the ossicular chain is a value which certainly deserves in the future to play a part in otology. For any deviation from the normal tension will result in a decrease of auditory acuteness, and the finding of this change of tension is of great importance in the diagnosis and in the treatment of different diseases of the tympanum. Therefore, the determination of this value by the otologist is as desirable as the determination of blood pressure by the physician. Besides, the measurement of the tension of the tympanic membrane by means of the pneumophone¹ is not difficult, it does not take much time and it is exact.

PRINCIPLE OF THE PNEUMOPHONE

A constant low tone is delivered to the ear through a rubber tube while the air pressure on the tympanic membrane is lowered from positive to negative. The tone is heard . . . [Full Text PDF of this Article]

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