JP2011019741A - Biopsy forceps for endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide biopsy forceps for endoscopes capable of quickly providing a tissue specimen collected in forceps cups for a pathological diagnosis. <P>SOLUTION: A pair of forceps cups 10 (10A and 10B) disposed at the tip of a flexible sheath 1 so as to be freely opened/closed like a beak are formed from a transparent material, and staining fluid injection ports 11 for injecting staining fluid for staining the tissue specimen 100 collected inside the pair of forceps cups 10 (10A and 10B) are bored in at least one back sections of the pair of forceps cups 10 (10A and 10B). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an endoscopic biopsy forceps.

  Endoscopic biopsy forceps are used to collect biological tissue specimens in a pair of forceps cups that are inserted and removed from the endoscope treatment instrument insertion channel, opened and closed from the hand side, and opened and closed like a hook at the tip. (For example, Patent Document 1).

JP 2009-125418 A

  A tissue specimen collected with an endoscopic biopsy forceps is subjected to observation of the cut surface with a microscope to determine the presence or absence of a lesion and other pathological diagnoses. However, between the collection of the tissue specimen and the microscopic observation, it is necessary to take a time-consuming process such as taking out the collected tissue specimen from the forceps cup, fixing, staining, and preparing the specimen for observation. It takes a long time.

  It is an object of the present invention to provide an endoscopic biopsy forceps that can quickly provide a tissue specimen collected in a forceps cup for pathological diagnosis.

  In order to achieve the above object, the biopsy forceps for endoscope according to the present invention has a pair of forceps cups arranged at the distal end of the flexible sheath so as to be openable and closable at the distal end side of the flexible sheath. In the endoscopic biopsy forceps configured to be opened and closed by an operation from a pair of forceps cups, the pair of forceps cups are formed of a transparent material, and A staining solution injection port for injecting a staining solution for staining a tissue sample collected in the forceps cup is formed in at least one back portion of the pair of forceps cups.

  Note that when the pair of forceps cups in the closed state is viewed from the side in the opening / closing direction, the boundary edge between the pair of forceps cups may be formed around the central position of the pair of forceps cups. Good.

  Moreover, the wall part located in the side with respect to the opening / closing direction among the outer walls of the pair of forceps cups may be formed in a planar shape.

  According to the present invention, the pair of forceps cups is formed of a transparent material, and the staining liquid injection port for injecting the staining liquid for staining the tissue specimen collected in the pair of forceps cups is the back of the forceps cup. Therefore, the tissue specimen collected in the forceps cup can be dyed without being taken out from the forceps cup, and can be rapidly performed as it is until the pathological diagnosis.

It is side surface sectional drawing of the front-end | tip part of the biopsy forceps for endoscopes which concerns on the Example of this invention. It is a side view in the state where a pair of forceps cups of the biopsy forceps for endoscopes concerning the example of the present invention opened. It is an expanded side sectional view in the state where a tissue specimen piece was collected in a pair of forceps cups of an endoscopic biopsy forceps according to an embodiment of the present invention. FIG. 4 is a cross-sectional view taken along IV-IV in FIG. 3 of the biopsy forceps for endoscope according to the embodiment of the present invention.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side sectional view of a distal end portion of an endoscopic biopsy forceps according to an embodiment of the present invention, and FIG. 2 is a side view of a pair of forceps cups 10 (10A, 10B) opened. 3 is an enlarged side cross-sectional view of the tissue specimen piece 100 collected in the pair of forceps cups 10, and FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG.

  Reference numeral 1 shown in FIG. 1 is a flexible sheath that is inserted into and removed from a treatment instrument insertion channel of an endoscope (not shown). The flexible sheath 1 is formed of, for example, a tetrafluoroethylene resin tube having an outer diameter of about 2 mm and a length of about 1 to 2 m. However, it may be formed of a closely wound coil pipe made of stainless steel wire.

  In the flexible sheath 1, a flexible operation wire 2 made of a stranded wire obtained by twisting a plurality of thin stainless steel wires is inserted and disposed over the entire length so as to be movable back and forth in the axial direction. The operation wire 2 is advanced and retracted at an operation unit (not shown) connected to the proximal end of the flexible sheath 1.

  The tip support frame 3 connected in series to the tip of the flexible sheath 1 is formed with a slit 4 that opens to the tip side. Reference numeral 5 denotes a support shaft that pivotally supports the pair of forceps cups 10 so as to be openable and closable in a bowl shape. The support shaft 5 is extended across the slit 4 on the distal end side of the distal support frame 3, and a pair of forceps cups 10 are rotatably supported by the support shaft 5.

  The pair of forceps cups 10 are arranged so as to protrude straight forward from the tip of the tip support frame 3 when in the closed state. A drive arm 7 extending rearward from the support shaft 5 from each forceps cup 10A, 10B is integrally connected to each forceps cup 10A, 10B.

  The distal end of the operation wire 2 is inserted and connected so as not to be detached from a connection hole 8 formed in the vicinity of the rear end of the drive arm 7 located in the slit 4. However, a link mechanism that opens and closes the pair of forceps cups 10 may be disposed in the slit 4 and the tip of the operation wire 2 may be connected to the link mechanism.

  With such a configuration, when the operation wire 2 is advanced or retracted from the proximal end side of the flexible sheath 1, the drive arm 7 rotates about the support shaft 5 and the forceps cup 10 is opened and closed in a hook shape. FIG. 1 shows a state in which the forceps cup 10 is closed, and FIG. 2 shows an open state.

  The pair of forceps cups 10 is made of a transparent and high-strength resin material such as polycarbonate (PC), polypropylene (PP), or polymethyl methacrylate (PMMA).

  Therefore, as shown in FIGS. 3 and 4, a biological tissue specimen 100 (hereinafter referred to as “tissue specimen”) 100 collected in a pair of forceps cups 10 is kept in a state where the forceps cup 10 is closed. It can be observed through the wall of the forceps cup 10 from the outside.

  A staining solution injection port 11 for injecting a staining solution for staining the tissue specimen 100 collected inside is formed in the back of each of the pair of forceps cups 10 (10A, 10B). However, the staining liquid injection port 11 may be provided on at least one back portion of the pair of forceps cups 10 (10A, 10B).

  One forceps cup 10A and the other forceps cup 10B of the pair of forceps cups 10 are configured so that a pair of forceps cups 10 in a closed state are laterally (in the direction of arrow A) as shown in FIGS. ), The boundary edges of the pair of forceps cups 10A and 10B are different from each other so that they are located around the center position of the pair of forceps cups 10 (ie, deviated from the center position). Is formed.

  As a result, when the tissue specimen 100 in the pair of forceps cups 10 is observed from the direction of the arrow A, the boundary edge between the pair of forceps cups 10A and 10B does not interfere with the observation, and a good tissue diagnosis can be performed. it can.

  The shape of the boundary edge between the pair of forceps cups 10A and 10B is, for example, as shown in FIG. 2, and the boundary edge of one forceps cup 10A out of the boundary edges between the pair of forceps cups 10A and 10B is the other forceps cup. 10B side is formed in a convex shape (convex shape portion 12), and the boundary edge of the other forceps cup 10B is formed in a concave shape into which the boundary edge of one forceps cup 10A is fitted (concave shape portion 13). . However, the convex portion 12 and the concave portion 13 may be provided on at least one of the side walls of the pair of forceps cups 10.

  Moreover, as shown in FIG. 4, the wall part located in the side with respect to the opening / closing direction among the outer walls of the pair of forceps cups 10 (10A, 10B) is formed in a planar shape. In FIG. 4, the wall portions located on the left and right are the planar wall portions, which are the wall portions where the convex shape portion 12 and the concave shape portion 13 are formed.

  As a result, when observing the tissue specimen 100 in the pair of forceps cups from the direction of the arrow A, a good observation image with little distortion can be obtained. The planar wall portion only needs to be provided on at least one of the side walls of the pair of forceps cups 10.

  The endoscopic biopsy forceps configured in this way is passed through a treatment instrument insertion channel of an endoscope (not shown), and when the tissue specimen 100 is collected in the pair of forceps cups 10, it is pulled out of the body. .

  Then, without opening the pair of forceps cups 10, the staining liquid is injected into the forceps cup 10 from the staining liquid injection port 11 to stain the tissue specimen 100 in the forceps cup 10. The stained tissue specimen 100 inside is observed through 10 walls.

  In this way, the pathological examination of the tissue specimen 100 can be performed immediately without removing the tissue specimen 100 from the forceps cup 10 while being in the endoscopic examination room. In addition, if an endoscope capable of performing microscopic super-magnification observation such as a confocal endoscope is used, there is a possibility that pathological examination can be performed in the body without pulling out the biopsy forceps for endoscope. Also occurs.

DESCRIPTION OF SYMBOLS 1 Flexible sheath 2 Operation wire 5 Support shaft 10 A pair of forceps cup 10A, 10B Forceps cup 11 Staining liquid injection port 12 Convex shape part 13 Concave shape part 100 Tissue sample

Claims (3)

A pair of forceps cups arranged at the distal end of the flexible sheath so as to be openable and closable is opened and closed by an operation from the proximal end side of the flexible sheath, and a tissue specimen is collected in the pair of forceps cups. In an endoscopic biopsy forceps configured to be able to
The pair of forceps cups is formed of a transparent material, and a staining liquid injection port for injecting a staining liquid for staining a tissue specimen collected in the pair of forceps cups is provided at least on the pair of forceps cups. An endoscopic biopsy forceps which is formed in one back portion.   When the pair of forceps cups in the closed state is viewed from the side with respect to the opening / closing direction, a boundary edge between the pair of forceps cups is formed to bypass the vicinity of the center position of the pair of forceps cups. The biopsy forceps for endoscope according to claim 1.   The biopsy forceps for an endoscope according to claim 2, wherein a wall portion positioned laterally with respect to the opening / closing direction of the pair of forceps cups is formed in a planar shape.

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