Importance

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Abstract

A coniostomy tube intended for insertion through the front wall of the larynx between the bottom edge of the thyroid cartilage and the upper edge of the front part of the cricoid cartilage includes a pre-shaped curved tubular pipe having a substantially straight patient-end section, a pipe connector and an intermediate tube section which is curved through substantially 100.degree.. At least that part of the tube which extends through the opening between the thyroid cartilage and the cricoid cartilage has a substantially oval cross-sectional shape with the small axis of the ovality positioned in the curvature plane of the tube. This ovality is in the range of 1:1.2 to 1:1.35. The curved intermediate section of the tube preferably has essentially the same ovality and ovality orientation, and the tube may also have the same oval cross-sectional shape along the whole of its length. The outer pipe connector of the tube preferably forms an angle of 80.degree. with the substantially straight patient-end section of the tube.

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First Claim