JPS599176B2 - Cell tissue collection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tissue collection device for collecting tissue from the epidermis of an internal organ in a body cavity, such as a gastric viscous surface.

Conventionally, in order to collect cell tissue from the lesioned area of the epidermis of an organ inside a living body cavity under endoscopic observation, there were methods such as cutting the mucous membrane of the lesioned area with bowl-shaped scissors forceps, or spraying water on the lesioned area. Methods such as suctioning and collecting this water to collect diseased cells have been used, but the former causes significant damage to the organ epidermis, and when biopsies are performed with forceps from several locations, there is severe bleeding and the lesion can be detected using an endoscope. This method has the disadvantage that it is difficult to understand by observation, and the latter method has disadvantages such as a lack of reliability because diseased cells must be collected from a large amount of water that has been collected by suction.

In addition, in the cooling method using a known cooling gas, the flexibility of the flexible tube,
There was a problem with the diameter.

The main object of the present invention is to provide the above-mentioned conventional cell tissue collection method,
It is an object of the present invention to provide a cell tissue collection device which solves the drawbacks of the device, causes little damage to the epidermis of an internal organ in a living body cavity, and can reliably collect cell tissue from a target site.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram of the main parts of the distal end of the endoscope.

In the illustrated embodiment, the head member is configured to be thermoelectrically cooled.

That is, a cup-shaped support member made of an insulating material is fixed to the tip of the flexible tubular member 1'.

A material having good electrical conductivity and good thermal conductivity, that is, a metal block 2' is fixed to the inner bottom surface of the support member 2''.

An N-type semiconductor 5 and a P-type semiconductor 6, which are electrically connected to the metal block 2', are fixed to the side surface of the support member 2''.

Conductive wires 7 and 8 are connected to both semiconductors 5 and 6, respectively.
, 8 are connected to a DC power source provided with voltage control means.

When a direct current is passed through the conducting wire 7, the N-type semiconductor 5, the block 2', the P-type semiconductor 6, and the conducting wire 8 in this order, the block 2' is cooled by the Berthier effect.

Since the temperature of the end face of the block 2' and hence the support member 2'' changes in accordance with the amount of current, the degree of cooling of the head can be controlled by controlling the power supply.

In order to efficiently dissipate the heat generated at the contact points between the semiconductors 5, 6 and the conductive wires 7, 8, and to reduce the effect on the cooling of the block 2', a thinner flexible tube is inserted through the flexible tube 1'. All you have to do is circulate the air.

In order to prevent circulating air from touching the block 2' and imparting heat to it, it is desirable that the contact side and the block 2' be separated by a partition wall.

The cell tissue collection device according to the present invention as described above does not damage the surface of the internal organs in the body cavity and causes less bloodshed, so bloodshed may make it difficult to see the lesion area or blood may adhere to the surface of the endoscope lens. It has excellent features such as having few harmful effects and being able to reliably collect cell tissue from the target site.

Furthermore, in the known cooling method using cooling gas, when the cooling gas is passed through the endoscope, the flexible tube freezes, resulting in a lack of flexibility, which poses a risk of causing pain to the patient, but according to the present invention, The flexibility of the flexible tube can be maintained and the operability of the endoscope is not affected.

In addition, in the cooling method using cooling gas, it is necessary to consider the transport pipe for a special material called freeze resistance, but according to the present invention, this is not necessary, and the diameter of the flexible pipe is increased due to the presence of the transport pipe. The patient's pain can be reduced by preventing cancer.

[Brief explanation of the drawing]

FIG. 1 is an explanatory view of the main parts of the distal end of an endoscope according to an embodiment of the present invention. In the figure, 1' is a flexible tubular member, 2' and 2'' are head members, 5 and 6 are semiconductors, and 7 and 8 are input/output conductors.

Claims (1)

[Claims] 1. A flexible rod-shaped member, a head member disposed at the tip of the flexible rod-shaped member and in close contact with the epidermis within the body cavity, an input/output conductor provided within the flexible rod-shaped member, and cooling only the head member. the flexible rod-shaped member is inserted into a living body cavity, the head member is guided to come into close contact with a desired epidermal part within the cavity, and the cell tissue of the desired epidermal part is transferred to the head member. A cell tissue collection device that freeze-adheres cell tissue to a surface and peels off the frozen-adhered cell tissue from the surface of a living cavity.