Steel syringe for spinal anaesthesia - has external and passage diameters tapering to insertion point and aperture

摘要

The steel syringe for spinal anaesthesia comprises a straight cylindrical tube into which a removable stylet is inserted, an insertion point, and a front aperture for the tube passage. The external tube dia., and the dia. of the passage taper steadily at the forward end on which the point is situated, the latter and the aperture being at the apex of the cone formed. The stylet fills the taper end all round the periphery. The cone apex can have an oblique long ground face, with or without front or rear facet. The end of the ground face can be curved at the axis of the tube. ADVANTAGE - Easy use without risk or breakage inside bod s