FIELD: medicine. SUBSTANCE: device is made in the form of flexible tube. Through wedge-type incision is made along longitudinal axis of tube over entire length of the latter. Narrowing part is positioned at proximal end of tube, and widening part, at distal end. Distal end of tube has shear at angle of 45 deg. EFFECT: more effective construction. 2 cl, 3 dwg
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