Capsule medical device and body-tissue obtaining method

Abstract

The present invention provides a capsule medical device and a body-tissue obtaining method, capable of collecting a mass of body tissue from the in-vivo region of a subject. The capsule medical device (2) includes a capsule-shaped casing (20) that can be introduced into an in-vivo region of a subject (1); and a rotation driving unit (24) that generates torque along a circumferential direction of the capsule-shaped casing (20). The capsule medical device (2) also includes a cutting-obtaining unit (20c) that rotates along the circumferential direction of the capsule-shaped casing (20) due to the torque to cut out and obtain a mass of body tissue from the in-vivo region of the subject (1).

Description

technical field [0001] The present invention relates to a capsule medical device which is introduced into a subject and is used to collect a biotissue mass of a site to be examined by biopsy such as pathological diagnosis. Background technique [0002] Conventionally, in the field of endoscopes, there have been capsule-type medical devices that are introduced into internal organs of a subject to capture images of the internal organs (hereinafter sometimes referred to as in-vivo images). This capsule-type medical device has an imaging function and a radio communication function for taking pictures inside the capsule-shaped casing, and after being orally administered into a subject such as a patient, it sequentially takes pictures of the subject while moving in the digestive tract due to peristaltic motion or the like. The in-vivo images of the subject are sequentially transmitted by radio to a receiving device outside the subject each time. Furthermore, the capsule medical d...

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Problems solved by technology

[0006] However, in the above-mentioned existing capsule medical device, when the living tissue inside the subject is collected, the stroke of the forceps entering and leaving the capsule housing is limited by the size of the capsule housing (small enough to be introduced into the subject). internal size) is limited in a narrow range, it is difficult to cut and collect a block-shaped living tissue (hereinafter referred to as a biopsy block) from the internal part of the subject with the forceps whose stroke is limited, and therefore, there is a possibility that the collection From biopsy blocks of the size required for biopsy such as pathological diagnosis

[0007] Furthermore, in the capsule medical device disclosed in Patent Document 1, even when the brush is rotated by interacting with a rotating magnetic field from the outside, at most cells such as mucous membranes are adhered to the brush for collection, and it is difficult to collect them from the brush. collection of biopsy blocks

In addition, in the capsule medical device disclosed in Patent Document 1, even when the forceps are opened and closed by interacting with a rotating magnetic field from the outside, it is difficult to collect a mass of living tissue only by opening and closing the forceps.

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