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Piercing needle-equipped cannula

A puncture needle and cannula technology, which is applied in puncture needles, ophthalmic surgery, ophthalmic treatment, etc., and can solve problems such as deformation, shortening time, and loosening of the closed state

Active Publication Date: 2018-08-03
MANI INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, in order to shorten the time, it is sufficient to use a member in which the puncture needle 115 is attached to the cannula 110 in advance, but in this case, when the puncture needle 115 is pulled out, the slit 113a will be deformed by the puncture needle 115.
That is, after pulling out the puncture needle 115, there will be such a problem that the closed state of the slit 113a becomes loose, or a gap is generated between the slit 113a and the surgical instrument when the surgical instrument is inserted, and the vitreous humor and the like are likely to leak out.

Method used

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  • Piercing needle-equipped cannula
  • Piercing needle-equipped cannula
  • Piercing needle-equipped cannula

Examples

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Embodiment Construction

[0022] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0023] figure 1 Four types of piercing needles for the cannula with piercing needle of the present invention are exemplified. Here, the sharp end of the puncture needle 15 is the distal end 15a, and the non-sharp end on the opposite side is the base end 15b.

[0024] The basic shape of the puncture needle 15 is composed of the following parts: a needle main body 15c, which is composed of a pointed end 15a for piercing the eyeball and a cylindrical portion continuous with the end 15a; a slit through portion 15s, which is installed on the sleeve The portion that penetrates the slit and is continuous with the needle main body 15c; and the base portion 15d that is closer to the base end 15b side than the slit penetration portion 15s. That is, the slit penetration part 15s is a part which connects the needle main body part 15c and the base part 15d.

[0025] and, figur...

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PUM

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Abstract

Provided is a piercing needle-equipped cannula which is fitted with a piercing needle in advance and which prevents a deformation of a slit part by the piercing needle from remaining after removal ofthe piercing needle. This piercing needle-equipped cannula (100) has: a cannula (10) used to pierce an eyeball in eye surgery; a cap (13) made of a resin, having a slit (13a), and provided in the cannula (10); and a piercing needle (15) attached to the cannula (10). The piercing needle (15) includes a needle body portion (15c) on the tip side, a base portion (15d) on the base end side, and a slitpenetrating portion (15s) that penetrates the slit (13a) while joining the needle body portion (15c) and the base portion (15d) to each other. The cross-sectional area of the slit penetrating portion(15s) is smaller than the cross-sectional area of the thickest part of the needle body portion (15c).

Description

technical field [0001] The present invention relates to a cannula with a puncture needle for use in ophthalmic surgery, in which the puncture needle is pre-installed. Background technique [0002] In ophthalmic surgery, when a surgical instrument or the like is used in the eyeball, a cannula is attached to the eyeball, and the surgical instrument or the like is passed through the cannula (for example, Patent Document 1). Figure 5 is a sectional view of a normal sleeve. The cannula 110 has a structure in which the vicinity of the base end of the metal tube 111 is embedded in a resin base 112, and the side surface of the base 112 and the side of the tube 111 are covered with a resin cap 113 such as silicone rubber. base end. [0003] The base 112 functions as a stopper by contacting the surface of the eyeball when pierced by the tube 111 , and the cap 113 has a function of preventing leakage of vitreous humor or the like from the inside of the eyeball through the tube 111 . ...

Claims

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Application Information

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IPC IPC(8): A61F9/007
CPCA61F9/0017A61F9/00736A61F9/007A61B17/3421A61B17/3462
Inventor 村上悦男
Owner MANI INC