Endoscopic puncture needle

Patent metadata

Field	Value
Publication number	US-2020069154-A1
Application number	US-201916677776-A
Country	US
Kind code	A1
Filing date	Nov 8, 2019
Priority date	Jun 2, 2017
Publication date	Mar 5, 2020
Grant date	—

Abstract

The disclosed technology is directed to a puncture needle access system for introducing guide wire into an interior of a tubular organ. The puncture needle access system includes an endoscope having an insertion portion. An endoscopic puncture needle is configured to be engaged with the insertion portion and includes an elongated tubular sheath having a lumen that extends in a longitudinal direction through the elongated tubular sheath. A tubular needle tube is inserted movably in the longitudinal direction into the lumen of the elongated tubular sheath. The tubular needle tube includes an inclined cutting-edge face formed at a distal end. The elongated tubular sheath includes an inclined surface oriented toward a distal end of the sheath so that the inclined surface comes closer to the elongated tubular sheath. The distal end of the sheath is located on a proximal end side of the sheath relative to a distal end of the inclined surface.

First claim

What is claimed is:

1 . A puncture needle access system for introducing guide wire into an interior of a tubular organ comprising:
an endoscope having an insertion portion; and an endoscopic puncture needle configured to be engaged with the insertion portion wherein the endoscopic puncture needle includes
an elongated tubular sheath having a lumen that extends in a longitudinal direction through the elongated tubular sheath; and
a tubular needle tube to be inserted movably in the longitudinal direction into the lumen of the elongated tubular sheath,
wherein the tubular needle tube includes an inclined cutting-edge face formed at a distal end thereof relative to the longitudinal direction, and
the elongated tubular sheath includes an inclined surface oriented toward a distal end of the sheath so that the inclined surface comes closer to a central axis of the elongated tubular sheath, and the distal end of the sheath on a side facing the inclined surface with the lumen interposed in a radial direction therebetween is located on a proximal end side of the sheath relative to a distal end of the inclined surface.

2 . The puncture needle access system of claim 1 , wherein the inclined surface formed at a portion in a circumferential direction of an inner surface of the lumen at a distal end portion of the elongated tubular sheath and is disposed at a location where, with the tubular needle tube inserted in the lumen protruding forward at a distal end of the cutting-edge face from the distal end of the elongated tubular sheath, the cutting-edge face comes into abutment on a proximal end side thereof against the inclined surface, and a guide wire inserted in the tubular needle tube can protrude from a distal end of the needle tube.

3 . The puncture needle access system of claim 1 , wherein the inclined surface is configured of an inner surface of a wall of the elongated tubular sheath, and the inner surface has been formed by bending a portion in a circumferential direction of the distal end portion of the elongated tubular sheath inward in a radial direction.

4 . The puncture needle access system of claim 1 , wherein the cutting-edge face of the tubular needle tube includes a stepped portion recessed from the cutting-edge face with a depth dimension substantially equal to a thickness dimension of the wall of the elongated tubular sheath, and the stepped portion is configured to come into abutment against the inclined surface with the distal end of the cutting-edge face of the tubular needle tube being caused to protrude forward from the distal end of the sheath.

5 . The puncture needle access system of claim 4 , wherein the wall of the portion of the elongated tubular sheath, the portion forming the inclined surface, is configured to be elastically deformable to a location where the wall becomes substantially parallel to the longitudinal direction of the elongated tubular sheath by pressing the inclined surface in the longitudinal direction of the elongated tubular sheath with the tubular needle tube brought into abutment against the inclined surface.

6 . An endoscopic puncture needle used in an endoscope having an insertion portion, comprising:
an elongated open ended tubular sheath; and a tubular needle tube configured to be inserted movably in a longitudinal direction into the elongated open ended tubular sheath, wherein the tubular needle tube includes an inclined cutting-edge face formed at a distal end thereof relative to the longitudinal direction, and the elongated open ended tubular sheath includes an inclined surface oriented toward a distal end of the sheath so that the inclined surface comes closer to a central axis of the elongated tubular sheath, and the distal end of the sheath on a side facing the inclined surface interposed in a radial direction therebetween is located on a proximal end side of the sheath relative to a distal end of the inclined surface.

7 . The endoscopic puncture needle of claim 6 , wherein the inclined surface formed at a portion in a circumferential direction of an inner surface of the lumen at a distal end portion of the elongated tubular sheath and is disposed at a location where, with the tubular needle tube inserted in the lumen protruding forward at a distal end of the cutting-edge face from the distal end of the elongated tubular sheath, the cutting-edge face comes into abutment on a proximal end side thereof against the inclined surface, and a guide wire inserted in the tubular needle tube can protrude from a distal end of the needle tube.

8 . The endoscopic puncture needle of claim 6 , wherein the inclined surface is configured of an inner surface of a wall of the elongated tubular sheath, and the inner surface has been formed by bending a portion in a circumferential direction of the distal end portion of the elongated tubular sheath inward in a radial direction.

9 . The endoscopic puncture needle of claim 6 , wherein the cutting-edge face of the tubular needle tube includes a stepped portion recessed from the cutting-edge face with a depth dimension substantially equal to a thickness dimension of the wall of the elongated tubular sheath, and the stepped portion is configured to come into abutment against the inclined surface with the distal end of the cutting-edge face of the tubular needle tube being caused to protrude forward from the distal end of the sheath.

10 . The endoscopic puncture needle of claim 9 , wherein the wall of the portion of the elongated tubular sheath, the portion forming the inclined surface, is configured to be elastically deformable to a location where the wall becomes substantially parallel to the longitudinal direction of the elongated tubular sheath by pressing the inclined surface in the longitudinal direction of the elongated tubular sheath with the tubular needle tube brought into abutment against the inclined surface.

11 . A method of introducing a guide wire into an interior of a tubular organ, the method comprising:
inserting an insertion portion of an endoscope into a body; guiding a needle tube and a sheath to advance relative to the insertion portion introduced in the body, whereby the needle tube and sheath are caused to puncture a tubular wall of the tubular organ; retreating the needle tube toward a proximal end side relative to the sheath with the sheath still remaining at a distal end thereof in the interior of the tubular organ; and inserting the guide wire to extend from the distal end of the sheath into the interior of the tubular organ with the needle tube being located at a proximal end side thereof on a distal end relative to the proximal end of the sheath.

Assignees

• Olympus Corp

Inventors

• Endo Takuo
• Katayama Tomofumi

Classifications

• A61B2017/0034

  adapted to be inserted through a working channel of an endoscope · CPC title

• A61B17/3478

  Endoscopic needles, e.g. for infusion (biopsy needles A61B10/0233; catheters with injection needles A61M25/0067) · CPC title

• A61B1/00098 Primary

  Deflecting means for inserted tools · CPC title

• A61B2017/3413

  guided by ultrasound · CPC title

• A61B1/018 Primary

  for receiving instruments · CPC title