US 11,432,842 B2Granted

Cannula

AssigneeMani, Inc.

InventorsEtsuo Murakami, Masanori Oshino

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Abstract

There is provided a cannula that suppresses leakage of vitreous humor, etc., from a slit through which a surgical tool is inserted. A cannula (10) used for piercing through an eyeball during an ophthalmic operation, includes: a pipe (11); a cylindrical base (12) fitted together with the circumference of a base end of the pipe (11); a resin cap (13) including a cover surface (13c) covering the surface of the base end of the pipe (11) and a side surface (13a) covering a cylindrical side surface of the base (12); and a slit (13d) passing through the center of the cover surface (13c). The outer diameter of the cylindrical side surface of the base (12) at a position where the cylindrical side surface of the base (12) touches the side surface (13a) of the cap is larger than the inner diameter of the side surface of the cap.

Claims2

Dependent claims

A cannula for piercing an eyeball during an ophthalmic operation, comprising:

a pipe;
a cylindrical base fitted together with a circumference of a base end of the pipe;
a resin cap comprising a cover surface covering a surface of the base end of the pipe and a side surface covering a cylindrical side surface of the base;
and
a slit passing through a center of the cover surface, wherein
an outer diameter of the cylindrical side surface of the base at a position where the cylindrical side surface of the base touches the side surface of the cap is larger than an inner diameter of the side surface of the cap,
the slit is linear,
the outer diameter of the cylindrical side surface of the base orthogonal to the slit is larger than the inner diameter of the side surface of the cap, and
the outer diameter of the cylindrical side surface of the base orthogonal to the slit is larger than the outer diameter of the cylindrical side surface of the base parallel to a length of the slit.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/071,082Filed 18 Jan 2017
Priority: JP JP2016-00773819 Jan 2016
Published: US 2021/0204972 A18 Jul 2021
Granted: 6 Sep 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

A61B 17/3421
Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating: cannulas
A61F 9/007
Methods or devices for treatment of the eyes; Devices for putting in contact-lenses; Devices to correct squinting; Apparatus to guide the blind;…:…
A61B 17/00234
Surgical instruments, devices or methods: for minimally invasive surgery
A61B 17/3462
Trocars; Puncturing needles: with means for changing the diameter or the orientation of the entrance port of the cannula, e.g. for use with…

Family

US 2021/0204972 A1Pre-grant publication · published 8 Jul 2021
US 11,432,842 B2This patent

From the US filing history. Foreign family members aren’t listed.

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