Submucosal layer dissection instrument, submucosal layer dissection system, and submucosal layer dissection method

• US 20050149099A1
• Filed: 12/16/2004
• Published: 07/07/2005
• Est. Priority Date: 12/19/2003
• Status: Active Grant

• Current Assignee: Olympus Corporation
• Original Assignee: Olympus Corporation
• Inventors: Sadamasa, Akihito, Yamano, Hiro-o
• Granted Patent: US 9,402,683 B2
• Time in Patent Office: Days
• US Class Current: 606/192
• CPC Class Codes: A61B 1/018 for receiving instruments
• CPC Class Codes: A61B 17/29 Forceps for use in minimally invasive surgery
• CPC Class Codes: A61B 17/3478 Endoscopic needles, e.g. for infusion biopsy needles A61B10/0233; catheters with injection needles A61M25/0067
• CPC Class Codes: A61B 18/1402 Probes for open surgery
• CPC Class Codes: A61B 18/1492 having a flexible, catheter-like structure, e.g. for heart ablation A61B18/1477 takes precedence
• CPC Class Codes: A61B 2017/00269 endoscopic mucosal resection EMR
• CPC Class Codes: A61B 2018/00214 Expandable means emitting energy, e.g. by elements carried thereon
• CPC Class Codes: A61B 2018/0022 Balloons
• CPC Class Codes: A61B 2090/062 penetration depth
• CPC Class Codes: A61B 2218/002 Irrigation
• CPC Class Codes: A61B 90/02 Devices for expanding tissue, e.g. skin tissue implements for holding wounds open, surgical tractors A61B17/02; implantable mammary prosthesis A61F2/12; dilators A61M29/00

Abstract

A submucosal layer dissection instrument of the present invention includes an instrument body that is inserted into a submucosal layer, a line formed between the proximal end side and the distal end side of the instrument body; and an expanding section provided on the distal end side of the instrument body that expands in the case of having received a supply of fluid through the line.

Claims

1. A submucosal layer dissection instrument comprising:

an instrument body that is inserted into a submucosal layer;

a line formed between the proximal end side and the distal end side of the instrument body; and

an expanding section provided on the distal end side of the instrument body that expands in the case of having received a supply of a fluid through the line.

2. The submucosal layer dissection instrument according to claim 1, wherein

an insertion path into which a high-frequency scalpel is inserted is provided along the line.

3. The submucosal layer dissection instrument according to claim 1, wherein

the instrument body comprises a supply flow path for liquid to be injected into the submucosal layer.

4. The submucosal layer dissection instrument according to claim 2, wherein

the insertion path also serves as a supply flow path for liquid injected into the submucosal layer.

5. The submucosal layer dissection instrument according to claim 1, wherein:

the distal end of the instrument body has a shape such that it tapers towards the distal end; and

the location of the distal end of the expanding section during expansion is made to coincide with the location of the distal end of the instrument body.

6. The submucosal layer dissection instrument according to claim 1, wherein

an indicator that indicates the amount of insertion of the distal end of the insertion body is provided on the instrument body on the proximal end side than the expanding section.

7. A submucosal layer dissection system comprising:

an endoscope in which a first channel and a second channel are provided,

a submucosal layer dissection instrument according to claim 1 that is inserted into the first channel; and

a submucosal injection needle inserted into the second channel, which injects a liquid into the submucosal layer.

8. A submucosal layer dissection system comprising:

an endoscope in which a first channel and a second channel are provided;

a submucosal layer dissection instrument according to claim 1 that is inserted into the first channel; and

a grasping forceps inserted into the second channel, which supports the submucosal layer.

9. A submucosal layer dissection method comprising:

an insertion step in which a submucosal layer dissection instrument according to claim 1 is inserted into elevated submucosal layer; and

a dissection step in which the expanding section of the submucosal layer dissection instrument is expanded by supplying a fluid thereto followed by dissection of the submucosal layer.

10. The submucosal layer dissection method according to claim 9, further comprising

a hemostasis step in which an area of bleeding of the submucosal layer is stopped from bleeding by applying pressure with the expanding section.

11. A submucosal layer dissection method comprising:

a hole opening step in which a hole is opened in mucosa that covers a submucosal layer with a high-frequency incision instrument;

an insertion step in which the distal end of the instrument body of a submucosal layer dissection instrument according to claim 1 is inserted into the hole;

a dissection step in which the submucosal layer is dissected by supplying a fluid into the expanding section to expand it; and

an incision step in which at least one of the mucosa around the hole and the submucosal layer is incised using the high-frequency incision instrument.

12. A submucosal layer dissection method comprising:

a hole opening step in which a hole is opened in mucosa that covers a submucosal layer with a high-frequency incision instrument;

an insertion step in which the distal end of the instrument body of a submucosal layer dissection instrument according to claim 3 is inserted into the hole;

a dissection step in which the submucosal layer is dissected by supplying a fluid into the expanding section to expand it;

an incision step in which at least one of the mucosa around the hole and the submucosal layer is incised using the high-frequency incision instrument; and

a liquid injection step in which the liquid is injected into the supply flow path to elevate the submucosal layer.

13. The submucosal layer dissection method according to claim 12, further comprising

an irrigation step in which bleeding within the submucosal layer is irrigated by injecting the liquid into the supply flow path.

14. A submucosal layer dissection method comprising:

a hole opening step in which a hole is opened in mucosa that covers a submucosal layer with a high-frequency incision instrument;

an insertion step in which the distal end of the instrument body of a submucosal layer dissection instrument according to claim 5 is inserted into the hole;

a positioning step in which the location of the distal end of the instrument body is aligned with the dissected location of the submucosal layer;

a dissection step in which the submucosal layer is dissected by supplying a fluid into the expanding section to expand it; and

an incision step in which at least one of the mucosa around the hole and the submucosal layer is incised using the high-frequency incision instrument.

15. A submucosal layer dissection method comprising:

a hole opening step in which a hole is opened in mucosa that covers a submucosal layer with a high-frequency incision instrument;

an insertion step in which the distal end of the instrument body of a submucosal layer dissection instrument according to claim 6 is inserted into the hole;

a positioning step in which the location of the distal end of the instrument body is aligned with the dissected location of the submucosal layer based on the indicator;

a dissection step in which the submucosal layer is dissected by supplying a fluid into the expanding section to expand it; and

an incision step in which at least one of the mucosa around the hole and the submucosal layer is incised using the high-frequency incision instrument.

16. A submucosal layer dissection method comprising:

an elevation step in which the submucosal layer is elevated by injecting a liquid into the submucosal layer using the submucosal injection needle of a submucosal layer dissection system according to claim 7;

an insertion step in which the submucosal layer dissection instrument is inserted into the elevated submucosal layer; and

a dissection step in which the submucosal layer is dissected by supplying a fluid into the expanding section of the submucosal layer dissection instrument to expand it.

17. A submucosal layer dissection method comprising:

a support step in which the submucosal layer is supported using the grasping forceps of a submucosal layer dissection system according to claim 8;

an insertion step in which the submucosal layer dissection instrument is inserted into the elevated submucosal layer; and

a dissection step in which the submucosal layer is dissected by supplying a fluid into the expanding section of the submucosal layer dissection instrument to expand it.