FIELD: medicine.
SUBSTANCE: series of inventions relates to medicine. Surgical instrument such as a speculum comprising longitudinally extending cups-shaped pivotably mounted blades manufactured from a mouldable material, such as plastic or metal. Each blade has an inwardly curved circumferential edge with an edge face which is provided with a parting line resulting from moulding the blades. Method of manufacturing an elongated cup-shaped blade for a surgical instrument, such as a speculum, including: positioning moulding halves in a blade moulding process such that resulting parting lines are positioned on the blade, wherein the blade has an inwardly curved circumferential edge with support surface consisting of outer and inner radial surfaces. Obtained parting line lies closest to, or at the inner edge side of the supporting surface and at a distance from outer surface of the blade.
EFFECT: inventions prevent discomfort from the parting lines in patients.
15 cl, 38 dwg
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