GUIDE SHEATH AND GUIDE SHEATH SYSTEM

• US 20140046343A1
• Filed: 10/18/2013
• Published: 02/13/2014
• Est. Priority Date: 04/26/2011
• Status: Active Grant

• Current Assignee: Olympus Corporation
• Original Assignee: Olympus Corporation
• Inventors: OKAZAKI, Yoshiro, IKEDA, Hiromu
• Granted Patent: US 9,408,667 B2
• Time in Patent Office: Days
• US Class Current: 606/130
• CPC Class Codes: A61B 1/00148 using anchoring means
• CPC Class Codes: A61B 1/00154 using guiding arrangements for insertion
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 90/11 with guides for needles or instruments, e.g. arcuate slides or ball joints
• CPC Class Codes: A61M 2025/09133 having specific material compositions or coatings; Materials with specific mechanical behaviours, e.g. stiffness, strength to transmit torque
• CPC Class Codes: A61M 25/0041 pre-formed, e.g. specially adapted to fit with the anatomy of body channels urethral catheters A61F2/04
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 25/0102 Insertion or introduction using an inner stiffening member, e.g. stylet or push-rod
• CPC Class Codes: A61M 25/0108 using radio-opaque or ultrasound markers
• CPC Class Codes: A61M 25/0147 with movable mechanical means, e.g. pull wires
• CPC Class Codes: A61M 25/0662 Guide tubes
• CPC Class Codes: A61M 25/09 Guide wires
• CPC Class Codes: A61M 29/00 Dilators with or without means for introducing media, e.g. remedies instruments for performing visual medical inspections of cavities or tubes of the body A61B1/00
• CPC Class Codes: A61M 5/007 for contrast media
• CPC Class Codes: G02B 23/2476 Non-optical details, e.g. housings, mountings, supports

Abstract

Provided is a guide sheath that is prevented from coming out of a body cavity so as to allow for stable operation. A tubular guide sheath that guides an insertion section of a medical device to be inserted into a body cavity includes a base-end opening that is provided at a base end of the guide sheath and into which the insertion section is inserted; a distal-end opening that is provided at a distal end of the guide sheath; a flexible bent section that is provided at the distal end of the guide sheath and is elastically bent; and an exit opening that is provided in an outer side surface of the bent section and from which the insertion section extends out.

Claims

1. A tubular guide sheath that guides an insertion section of a medical device to be inserted into a body cavity, the guide sheath comprising:

a base-end opening that is provided at a base end of the guide sheath and into which the insertion section is inserted;

a distal-end opening that is provided at a distal end of the guide sheath;

a flexible bent section that is provided at the distal end of the guide sheath and is elastically bent; and

an exit opening that is provided in an outer side surface of the bent section and from which the insertion section extends out.

2. The guide sheath according to claim 1, wherein the exit opening in the bent section is oriented toward the distal end of the guide sheath in an axial direction thereof.

3. The guide sheath according to claim 1, wherein the exit opening in the bent section is oriented in a direction that intersects an axis of the guide sheath.

4. The guide sheath according to claim 1, wherein the exit opening in the bent section is oriented toward the base end of the guide sheath in an axial direction thereof.

5. The guide sheath according to claim 1, further comprising a deforming unit, provided in the guide sheath, for deforming the bent section into a straight shape.

6. The guide sheath according to claim 5, wherein the deforming unit is a tow wire that extends through an outer side of the bent section within the guide sheath and is connected to the distal end of the guide sheath.

7. The guide sheath according to claim 1, wherein a separator that separates the bent section into an outer side and an inner side is provided within the guide sheath and extends in an axial direction thereof from the base-end opening to the distal-end opening.

8. The guide sheath according to claim 1, further comprising an expanding mechanism that is provided at the base end of the guide sheath and that expands in a radially outward direction of the guide sheath.

9. The guide sheath according to claim 1, further comprising a strap that is provided at the base end of the guide sheath and that secures the guide sheath to a body surface.

10. The guide sheath according to claim 1, further comprising a rotation maintaining mechanism that maintains the guide sheath in a rotated state about an axis thereof.

11. The guide sheath according to claim 1, further comprising an air-sealing unit at the base end of the guide sheath.

12. The guide sheath according to claim 1, wherein the guide sheath is radiopaque.

13. A guide sheath system comprising:

the guide sheath according to claim 1;

a rod-shaped dilator that is inserted into the guide sheath; and

a guide wire that is inserted into the guide sheath and guides the dilator through the guide sheath.