Biopsy tissue collecting and treating device

Abstract

The present invention provides a biopsy tissue collecting and treating device (1) provided with a body section (12) to be introduced into a living body and pierced into an in-vivo tissue (100), projection sections (14) arranged on the periphery of the body section (12), and a stopper section (13) coming in contact with the surface of the in-vivo tissue (100) to define the piercing depths of the body section (12) and the projection sections (14) which have been pierced into the in-vivo tissue (100). The device has the enhanced ability of holding a collected living body tissue, can collect a sufficient volume of a living body tissue, and can easily collect an internal living body tissue at a target depth.

Description

technical field [0001] The present invention relates to a biopsy tissue extraction treatment tool for introducing into a patient's body and extracting a tissue in the body. Background technique [0002] In recent years, for example, for pretreatment diagnosis of cell abnormalities by bronchoscopy, treatment tools for extracting living tissue through the bronchi have been widely used. Such treatment tools are disclosed, for example, in JP-A-2001-29349, JP-A-7-33305, JP-A-9-192135, and JP-A-5-15543. [0003] As a treatment tool generally used in conjunction with an endoscope, biopsy forceps with a needle for an endoscope having a pair of opening and closing cups as disclosed in JP-A-2001-29349 is widely used. In this conventional biopsy forceps with a needle for an endoscope, the thorn-like portion protruding obliquely rearward is arranged so that the needle provided near the tip protrudes into the pair of forceps cups. [0004] In addition, Japanese Patent Application Publi...

AI Technical Summary

Problems solved by technology

[0006] However, if the biopsy forceps with an endoscope needle disclosed in the above-mentioned Japanese Patent Laid-Open No. 2001-29349 is small in order to be able to be introduced into the channel of a narrow-diameter endoscope such as a transbronchial biopsy, Then, since the flexible operating wire used to operate the pair of tong cups is also thinner, it becomes difficult to transmit the operating force to the tip, and there is a problem that the tong cups are difficult to open and close.

In addition, since a pair of biopsy cups must also be miniaturized, there are problems such as easy failure of the movable part of the biopsy cup and insufficient extraction capacity of living tissue.

[0007] With respect to the needle biopsy forceps with endoscope in the Japanese Patent Application Laid-Open No. 2001-29349, each treatment tool in the above-mentioned Japanese Patent Application Laid-Open No. 7-33305 to Japanese Patent Laid-Open No. 5-15543 has an opening and closing mechanism. A pair of biopsy cups have different biological tissue (cell) extraction parts, but the biological tissue extracted using these biological tissue extraction parts has poor retention, and there is a problem that it is difficult to extract enough biological tissue extraction capacity

[0008] In particular, the bacteria extracting tool for endoscope in Japanese Patent Application Laid-Open No. 7-33305 has a structure in which the mucous membrane of the inner cavity of the living body is attached to the brush portion by rubbing against the wall of the inner cavity of the living body, and it is difficult to extract internal tissues.

With respect to the structure of the Japanese Patent Application Laid-Open No. 2001-29349, in the cell brush of the Japanese Patent Application Laid-Open No. 9-192135 and the cell extraction device of the Japanese Patent Laid-Open No. 5-15543, although it is possible to puncture the biological However, it is difficult to determine the depth of puncturing the biological tissue extraction part into the tissue.

[0009] That is, in the cell brush of Japanese Patent Application Laid-Open No. 9-192135 and the cell extraction device of Japanese Patent Laid-Open No. 5-15543, the depth of puncturing the living tissue extraction part into the tissue cannot be made constant, but depends on Due to the puncture operation of the operator, it is difficult to extract the biological tissue at the target depth

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