Probe type device for removing living body tissue

• US 8,641,701 B2
• Filed: 03/06/2008
• Issued: 02/04/2014
• Est. Priority Date: 03/06/2007
• Status: Active Grant

• Current Assignee: Hoya Corporation, Kyoto University
• Original Assignee: Hoya Corporation, Kyoto University
• Inventors: Hangai, Masanori, Yoshimura, Nagahisa, Nakahara, Masaaki, Miyata, Kazunori, Eguchi, Tetsuya, Osakabe, Yasuhiro
• Primary Examiner(s): Hindenburg, Max
• Assistant Examiner(s): Foreman, Jonathan M
• Application Number:
  US12/449,988
• Publication Number:
  US 20100106054A1
• Time in Patent Office: 2,161 Days
• Field of Search: 600562-568, 606/167, 606/170, 606/171, 606/1, 606/2, 606/427, 606/32, 606/34, 606/39, 606/40, 607/1, 607/96
• US Class Current: 606/2
• CPC Class Codes: A61F 2009/00874 Vitreous
• CPC Class Codes: A61F 2009/00887 Cataract
• CPC Class Codes: A61F 9/00763 with rotating or reciprocating cutting elements, e.g. concentric cutting needles atherectomy cutting instruments A61B17/3207; endoscopic cutting instruments A61B17/320016
• CPC Class Codes: A61F 9/008 using laser
• CPC Class Codes: A61F 9/00821 for coagulation
• CPC Class Codes: A61M 1/84 Drainage tubes; Aspiration tips for negative pressure wound therapy A61M1/90; for surgical cutting instruments A61B17/32
• CPC Class Codes: A61M 2210/0612 Eyes

Abstract

There is provided a probe type living body tissue removing device comprising a probe unit having a probe formed in a capillary tube shape and an opening hole portion for internally aspirating a living body tissue, and also having a dissection device arranged within the probe and dissecting the living body tissue aspirated into the probe from the opening hole portion of the probe; wherein an aspiration force supplying device for supplying aspiration force to the probe unit, and a dissection driving source supplying device for supplying power or energy for fulfilling a function of the dissection device to the probe unit are connected to the probe unit; and the probe type living body tissue removing device dissects, and aspirates and removes the living body tissue by the dissecting means while the probe is inserted into the living body tissue and the living body tissue is aspirated through the opening hole portion; and a plurality of the opening hole portions of the probe are arranged.

Claims

1. A probe type living body tissue removing device comprising:

a probe unit for performing dissection while aspirating a living body tissue, the probe unit having a base end portion;

a hand piece for holding the probe unit;

a connecting tool detachably connecting the probe unit to the hand piece, the connecting tool being located in line between the hand piece and the probe unit;

an aspiration force supplying device for supplying aspiration force for aspirating and removing the living body tissue to the probe unit; and

a dissection driving source supplying device for supplying power or energy for dissecting the living body tissue in the probe unit;

said probe unit comprising;

a probe formed in a capillary tube shape;

a plurality of opening hole portions provided in the probe, for aspirating the living body tissue into the probe;

a dissecting device provided inside of the probe, for dissecting the living body tissue aspired into the probe through the plurality of opening hole portions by the aspiration force supplied from the aspiration force supplying device, by the power or the energy supplied from the dissection driving source supplying device; and

an aspiration port provided between the connecting tool and the probe, for removing the living body tissue dissected by the dissecting device through an inside of the probe, by introducing the aspiration force supplied from the aspiration force supplying device to the inside of the probe, the living body tissue exits the probe unit via the aspiration port, wherein

the dissection driving source supplying device is a laser light source for supplying a laser beam to the probe unit for dissecting the living body tissue,

the dissecting device has a light guide body for emitting the laser beam toward an inside space portion of the opening hole portions of the probe, and is configured to dissect the living body tissue by the laser beam emitted from the light guide body, without using a cutter of a mechanical driving system,

the laser beam is an Er;

YAG laser, and

the light guide body is a sapphire fiber.

2. The probe type living body tissue removing device according to claim 1, wherein at least one of a number of opening hole portions of the probe, a shape of the hole, a size of the hole and a position of the hole is variably constructed.

3. The probe type living body tissue removing device according to claim 2, wherein

the probe type living body tissue removing device has an opening hole adjusting tube fitted to be moved and adjusted within the probe such that an outer circumferential face of the opening hole adjusting tube comes in contact with an inner circumferential face of the capillary tubular probe, and

at least one of the number of opening hole portions of the probe, the shape of the hole and the size of the hole is changed by adjusting a blocking degree of the opening hole portion of the probe due to the opening hole adjusting tube by moving and adjusting the opening hole adjusting tube.

4. The probe type living body tissue removing device according to claim 3, wherein

an opening hole for an adjustment is arranged in the opening hole adjusting tube, and

at least one of the number of opening hole portions of the probe, the shape of the hole, the size of the hole and the position of the hole is changed by adjusting an overlapping degree of the opening hole and the opening hole portion of the probe by moving and adjusting the opening hole adjusting tube.

5. The probe type living body tissue removing device according to claim 1, wherein an aspiration-exhaust path of the dissected living body tissue is formed between the sapphire fiber and an inner wall of the probe.

6. The probe type living body tissue removing device according to claim 1, wherein an outer diameter of the probe is 20 G or more (about 0.9 mm or less).

8. The probe type living body tissue removing device according to claim 1, wherein the living body tissue is a gel-like living body.

9. The probe type living body tissue removing device according to claim 8, wherein the gel-like living body is a vitreous.

7. A probe unit, which is detachably connected to a hand piece by a connecting tool located in line to the hand piece and the probe unit, said probe unit comprising:

a probe formed in a capillary tube shape;

a plurality of opening hole portions provided in the probe, for aspirating a living body tissue into the probe; and

a dissecting device arranged within the probe for dissecting the living body tissue aspirated into the probe from the opening hole portions of the probe by an aspiration force supplied from an aspiration force supplying device through an aspiration port for aspirating and removing the living body tissue by power or energy supplied from a dissection driving source supplying device, the aspiration port being located between the connecting tool and the probe, the living body tissue exits the probe unit via the aspiration port, wherein

the dissection driving source supplying device is a laser light source for supplying a laser beam to the probe for dissecting the living body tissue,

the dissecting device has a light guide body for emitting the laser beam toward an inside space portion of the opening hole portions of the probe, and is configured to dissect the living body tissue by the laser beam emitted from the light guide body, without using a cutter of a mechanical driving system,

the laser beam is an Er;

YAG laser, and

the light guide body is a sapphire fiber.