[Echo laryngography. A contribution to the method of ultrasonic diagnosis of the larynx].

This article describes a method for sonographic investigation of the larynx, the suggested term for which is "echo laryngography". It is more purposeful if M-mode is employed as well as B-mode for the assessment of laryngeal function and performance. Intra- und extralaryngeal sound windows are described and a discussion concerning their access by means of a systematic transversal section from caudal to cranial and coronary and sagittal sections in the vertical plane will ensue. The varying degrees of ossification of the laryngeal cartilage and the air-filled parts of the larynx make sonography more difficult. The transverse and vertical epiglottis function test which we developed extends the range for sonography of the larynx. The possibilities for clinical application of "echo laryngography" will be published in subsequent presentations.