JP2006000228A - Puncture needle device for endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To greatly improve workability and alter the cost into an advantageous one by dispensing with a replacement of a puncture needle device, even when an automatic puncture function is required in the middle of an examination, and providing the puncture needle device without an automatic puncture function with the automatic puncture function. <P>SOLUTION: When it is impossible to manually successfully puncture a target site, an automatic puncture adapter 40 is attached to the puncture needle device 30 to continuously perform the examination and the puncture. The automatic puncture adapter 40 is provided with a cylinder 41, a piston 42 operated by the cylinder 41 and a coil spring 43 constantly energizing the piston 42 in the direction of being stored in the cylinder 41. The cylinder 41 is integrally formed with an operation part body grip part 45 to be freely fixed to an operation part body 34 and its side face is formed with a guide groove 47 freely guiding a projection part 46a of the piston end part 46. The side face of the piston 42 is integrally formed with a slider grip part 49 freely gripping a middle part of the slider 35. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  In particular, the present invention relates to an endoscope puncture needle device that is inserted into a treatment instrument channel of an ultrasonic endoscope and fixed to a channel inlet.

  Conventionally, in order to examine and diagnose the affected part in the body cavity, while observing the inside of the body cavity with an ultrasonic endoscope, the deep part of the pancreas, liver, kidney, etc. from the digestive tract wall of the stomach or duodenum using a puncture needle device A puncture needle is punctured at a target site of an organ to collect tissue and body fluid in a body cavity.

  As a puncture needle device used for such an ultrasonic endoscope, for example, in Japanese Patent Application Laid-Open No. 2003-190179, a sheath inserted through an insertion channel of an ultrasonic endoscope so as to freely advance and retract, and a proximal end portion of the sheath A puncture needle device for an ultrasonic endoscope is disclosed that includes an operation unit that also serves as a gripping unit and a needle tube that is inserted through a sheath and punctured into a body cavity tissue. In this puncture needle device, the puncture needle is manually inserted, but when the body tissue as the observation site is relatively hard or easily escaped, the tip of the puncture needle is difficult to puncture.

  As described above, when puncturing an observation site that is difficult to puncture, it is known that puncturing can be performed by increasing the puncturing operation of the puncture needle. However, it has been difficult to accurately insert the puncture needle into the target site by manually projecting the puncture needle at a high speed.

Therefore, in order to improve this problem, for example, as disclosed in JP-A-2001-275947, an urging member such as a spring is incorporated in the puncture needle device, and the insertion operation of the puncture needle is performed by applying this spring. Things to do with power have been proposed.
JP 2003-190179 A JP 2001-275947 A

  However, in the puncture needle device having the automatic puncture function disclosed in Patent Document 2 described above, the puncture needle is locked at a predetermined position against the urging force of the spring, or at a timing intended by the operator. Since a puncture switch or the like that releases the locked state and performs a puncturing operation is provided in the operation unit of the puncture needle device, it is heavy and slightly sized, so that the operability is inferior. . Moreover, the price is also expensive.

  Therefore, first, when a test is performed with a puncture needle device that does not have an automatic puncture function as disclosed in Patent Document 1 described above, and the puncture needle device cannot be successfully inserted, a puncture needle that does not have an automatic puncture function. In general, puncture is performed by replacing the device with a puncture needle device having an automatic puncture function. However, in this case, it is troublesome to replace a puncture needle device having no automatic puncture function with a puncture needle device having an automatic puncture function, and eventually a puncture needle device having an automatic puncture function must be prepared. It is not preferable in terms of cost.

  The present invention has been made in view of the above circumstances, and it is not necessary to replace the puncture needle device even if an automatic puncture function is required during the examination, and it is automatic for a puncture needle device that does not have an automatic puncture function. An object of the present invention is to provide an endoscopic puncture needle device that can provide a puncture function, greatly improve workability, and is advantageous in terms of cost.

  The present invention relates to a sheath that is inserted into a channel provided in an endoscope, a needle tube that is inserted into the sheath and can be protruded and retracted from the distal end of the sheath, and an operation for supporting the proximal end side of the sheath A main body, a slider which is slidably disposed with respect to the operation main body, supports the needle tube and is movable together with the needle tube, and a first fixing means which can be selectively fixed to the operation main body. A second fixing means that can be selectively fixed to the slider; and at least the first fixing means fixed to the operation section main body, and the second fixing means fixed to the slider, and the needle tube Energizing means for relatively energizing the first fixing means and the second fixing means in the direction protruding from the distal end of the sheath, the first fixing means by the energizing means, and the first Execution and suppression of relative movement with the two fixing means; Is characterized in that a triggering means for performing.

  The puncture needle device for an endoscope according to the present invention does not need to replace the puncture needle device even if an automatic puncture function is required during the examination, and automatically punctures a puncture needle device that does not have an automatic puncture function. A function can be given, workability is greatly improved, and cost is advantageous.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 7 show a first embodiment of the present invention, FIG. 1 is a schematic configuration diagram of an ultrasonic endoscope to which a puncture needle device is attached, and FIG. 2 is a configuration of a distal end portion of the ultrasonic endoscope. FIG. 3 is a cross-sectional view illustrating the overall configuration of the puncture needle device, FIG. 4 is a perspective view of attaching an automatic puncture adapter to the puncture needle device, and FIG. 5 is a view of attaching a puncture needle device having an automatic puncture adapter. FIG. 6 is a schematic configuration diagram of the ultrasonic endoscope, FIG. 6 is a cross-sectional view illustrating the internal configuration of the automatic puncture adapter before automatic puncture, and FIG. 7 is a cross-sectional view illustrating the internal configuration of the automatic puncture adapter after automatic puncture.

  In the first embodiment, the configuration of the puncture needle device will be described first in a state where an automatic puncture adapter (described later) is not attached, that is, in a state where there is no automatic puncture adapter because manual puncture is performed. .

  In FIG. 1, reference numeral 1 denotes an ultrasonic endoscope. The ultrasonic endoscope 1 is an elongated and flexible insertion portion 2 that is inserted into a body cavity, and is positioned at the proximal end of the insertion portion 2. An operation unit 3, a universal cord 4 extending from the side of the operation unit 3, an endoscope connector 5 provided at a proximal end portion of the universal cord 4 and connected to a light source device (not shown), and an endoscope connector An ultrasonic cable 6 extending from the vicinity of 5 and an ultrasonic connector 7 provided at a proximal end portion of the ultrasonic cable 6 and connected to an ultrasonic observation device (not shown) are mainly configured.

  The insertion portion 2 is located at the distal end of the bending portion 9, the distal end rigid portion 8 formed of a hard resin member, the bendable bending portion 9 located at the rear end of the distal end hard portion 8, in order from the distal end side. In other words, a flexible portion 10 having a small diameter, a long length, and flexibility reaching the distal end portion of the operation portion 3 is continuously provided. In addition, as a material of the distal end hard portion 8, polysulfone or the like having good chemical resistance and biocompatibility is used.

  The operation unit 3 includes an angle knob 11 for controlling the bending of the bending portion 9 in a desired direction, an air / water supply button 12 for performing air supply and water supply operations, and a suction button 13 for performing a suction operation. Is provided.

  Further, a treatment instrument insertion port 15 for inserting a treatment instrument such as a forceps or a puncture needle device 30 into a target site in the body cavity is provided on the distal end side of the operation unit 3. A treatment instrument insertion channel 16 (see FIG. 2) is formed in the insertion portion 2.

  A treatment instrument such as a puncture needle device 30 inserted through the treatment instrument insertion channel 16 via the treatment instrument insertion port 15 is a treatment instrument insertion channel 16 provided in the distal end hard portion 8 as shown in FIG. It protrudes from the front end opening 18 formed in the front end opening wall 17.

  A forceps raising base 19 is swingably provided in the vicinity of the distal end opening 18 of the treatment instrument insertion channel 16 and can be operated by a forceps raising lever (not shown) provided in the operation section 3. . By operating the forceps raising lever, the forceps raising base 19 swings and a treatment tool such as a puncture needle device 30 for sucking tissue protruding from the distal end opening 18 is moved within an ultrasonic scanning plane α described later. .

  As shown in FIG. 2, on the distal end side of the distal end hard portion 8, a convex ultrasonic transducer 20 configured by arranging a plurality of piezoelectric elements (not shown) for transmitting and receiving ultrasonic waves is disposed at the distal end hard portion. 8 and has an ultrasonic scanning surface α having a scanning range of about 180 degrees, for example, in a fan-shaped range parallel to the longitudinal axis direction of the insertion portion 2 and indicated by an arrow.

  This ultrasonic scanning range is set up to the vicinity of the distal end opening 18 of the treatment instrument insertion channel 16, but is set so that the distal end hard portion 8 is not included in this ultrasonic scanning range. Further, the vicinity of the distal end opening 18 of the treatment instrument insertion channel 16 is formed such that the central axis of the treatment instrument insertion channel 16 is included in the extended surface of the ultrasonic scanning plane α.

  The distal end slope portion 21 of the distal end rigid portion 8 is provided with an illumination lens cover 22 constituting an illumination optical system, an observation lens cover 23 constituting an observation optical system, and an air / water feed nozzle 24.

  As shown in FIG. 3, the puncture needle device 30 is formed with a sheath 31 inserted into the treatment instrument insertion channel 16 and a sharp shape with a distal end portion inserted and disposed in the sheath 31 so as to be freely advanced and retracted. The thin and thin needle tube 32 formed of, for example, a stainless steel pipe, the hollow cylinder 33 that can be fixed to the treatment instrument insertion port 15, and the base end portion of the sheath 31 are fixed, and can move forward and backward in the cylinder 33. It is mainly configured by including a hollow operation portion main body 34 and a hollow slider 35 in which a proximal end portion of the needle tube 32 is detachably fixed and can be moved back and forth within the operation portion main body 34. In the needle tube 32, a stylet 36 having a sharp tip is detachably disposed.

  The cylinder 33 is provided with a screw portion 33a that is screwed to a base (not shown) of the treatment instrument insertion port 15 at the tip, and by screwing the screw portion 33a with the base of the treatment tool insertion port 15, The cylinder 33 can be fixed to the treatment instrument insertion port 15.

  The cylinder 33 is formed with an elongated guide groove 33b that guides the movement of a fastening screw 37a of a knob 37, which will be described later, connected to the operation unit main body 34.

  The operation unit main body 34 is connected to the sheath 31 via a sheath connecting member 38 at the distal end. Further, the operating portion main body 34 is provided with a knob 37 protruding from the guide groove 33b on the outer side of the cylinder 33 on the side surface on the front end side by a fastening screw 37a. Therefore, by rotating and tightening the knob 37, the relative movement between the cylinder 33 and the operation portion main body 34 can be restricted. Conversely, by rotating and loosening the knob 37, the cylinder 33 and the operation portion main body 34 can move relative to each other, and the operation portion main body 34 is moved forward and backward with respect to the cylinder 33. The protruding length of the sheath 31 from the distal end opening 18 can be selectively set.

  A hollow slider 35 that can be moved forward and backward in the operation section main body 34 is provided with a distal end portion of a needle base 32 a connected to the proximal end of the needle tube 32 and a detachable needle connection base 35 a at the rear end.

  The rear end of the needle cap 32a of the needle tube 32 is detachably provided with a stylet cap 36a connected to the base end of the stylet 36.

In the puncture needle device 30 having no automatic puncture function configured as described above, the examination proceeds as follows.
First, the distal end hard portion 8 of the insertion portion 2 of the ultrasonic endoscope 1 is inserted and disposed so as to face the vicinity of the target site. The sheath 31 in which the needle tube 32 of the device 30 is housed is introduced into the treatment instrument insertion channel 16. Then, the cylinder 33 is fixed to the treatment instrument insertion port 15 by screwing the screw portion 33 a of the cylinder 33 with the base of the treatment instrument insertion port 15. In the state where the sheath 31 is inserted, the knob 37 is fixed to the proximal end side of the cylinder 33 and the slider 35 is fixed to the position that protrudes most from the operation portion main body 34. For this reason, the distal end of the sheath 31 does not protrude from the distal end opening 18 of the treatment instrument insertion channel 16 and slightly rearward, and the distal end of the needle tube 32 does not protrude from the distal end of the sheath 31 and slightly rearward. Located in the stored state.

  Next, while observing the ultrasonic image of the ultrasonic endoscope 1, the knob 37 is loosened, and the knob 37 is moved to the tip side along the guide groove 33 b of the cylinder 33. By this operation, the operation section main body 34 is moved to the distal end side with respect to the cylinder 33, and the distal end of the sheath 31 protrudes from the distal end opening 18 of the treatment instrument insertion channel 16 and is arranged near the body cavity wall of the target observation site. . When the projection of the sheath 31 is completed, the knob 37 is tightened, and the cylinder 33 and the operation portion main body 34 are fixed.

  Thereafter, the slider 35 is manually projected at a high speed toward the tip. At this time, when the target site can be successfully punctured, the stylet 36 is pulled out from the needle base 32a together with the stylet base 36a, and then a syringe or the like (not shown) is connected to the needle base 32a to suck the tissue in the body cavity. Do. By this suction, the tissue in the body cavity enters the needle tube 32.

  Thereafter, the slider 35 is slid again to the proximal end side of the operation section main body 34, the needle tube 32 is accommodated in the sheath 31, and the connection between the treatment instrument insertion port 15 of the ultrasonic endoscope 1 and the puncture needle device 30 is released. The sheath 31 is pulled out from the treatment instrument insertion channel 16 of the ultrasonic endoscope 1. The tissue in the body cavity sucked into the needle tube 32 is taken out into a preparation or the like and examined to achieve biopsy of the deep tissue site.

  On the other hand, if the target portion cannot be punctured skillfully even when the slider 35 is pointed toward the tip and manually protruded at a high speed, an automatic puncture adapter 40 described below is replaced with a puncture needle device 30 as shown in FIG. Attach to the and continue the examination, ie, puncture. 5 shows the ultrasonic endoscope 1 with the automatic puncture adapter 40 attached to the puncture needle device 30.

  That is, as shown in FIGS. 4 to 7, the automatic puncture adapter 40 includes a cylinder 41 arranged in parallel with the operation portion main body 34 of the puncture needle device 30, a piston 42 operated by the cylinder 41, and the piston 42 as a cylinder. A coil spring 43 that is constantly urged in the direction of being stored in 41 is mainly configured.

  On the side surface of the cylinder 41, a base end side end portion of the operation portion main body 34 of the puncture needle device 30 and an operation portion main body gripping portion 45 that can be fixed by a fixing screw 44 with a knob are integrally formed.

  Further, the end surface of the cylinder 41 opposite to the side from which the piston 42 protrudes is closed and formed so that the piston end 46 is abutted on the inside.

  Further, a guide groove 47 is formed on the side surface of the cylinder 41 so as to guide the protrusion 46 a provided on the side surface of the piston end portion 46.

  The guide groove 47 includes an advancing / retreating groove 47a for guiding the protrusion 46a of the piston end 46 to advance and retreat, and a plurality of engagements formed at substantially right angles from the advance / retreat groove 47a to lock the protrusion 46a at the end. The locking groove 47b is formed at a position of, for example, 15 mm, 20 mm, 25 mm, and 30 mm for each dimension for projecting the piston 42. The dimensions are not limited to these dimensions. In the vicinity of each locking groove 47b, the dimensions of the piston 42 protruding from the locking groove 47b are engraved.

  The piston 42 is integrally provided with the above-described piston end 46 at the end stored in the cylinder 41, and the other end exposed from the cylinder 41 is convenient when the piston 42 is pulled out. A ring-shaped piston knob 48 in consideration of the above is provided.

  Further, the side surface of the piston 42 on the piston knob 48 side is extended substantially at right angles toward the middle portion of the slider 35 of the puncture needle device 30, and the middle portion of the slider 35 can be firmly gripped by elastic force. A slider grip 49 is integrally formed.

  Thus, in the first embodiment, the cylinder 41 and the operation unit main body gripping part 45 constitute a first fixing means, and the piston 42 and the slider gripping part 49 constitute a second fixing means, The coil spring 43 constitutes an urging means, and the piston end portion 46, the guide groove 47, and the piston knob 48 constitute a trigger means.

  In order to use the automatic puncture adapter 40 configured as described above, first, the dimension of the needle tube 32 protruding from the distal end of the sheath 31 to automatically puncture is determined, the piston knob 48 is pulled, along the advance / retreat groove 47a, The protrusion 46a of the piston end 46 is moved.

  Then, the piston knob 48 is rotated at the locking groove 47b closest to the dimension to be automatically punctured, the piston end 46 is rotated, and the protrusion 46a of the piston end 46 is passed through the locking groove 47b. The protrusion 46a is locked.

  In this state, the operating portion main body gripping portion 45 of the automatic puncture adapter 40 is securely fixed to the operating portion main body 34 by the fixing screw 44 with a knob, and the slider gripping portion 49 is securely fixed to the middle portion of the slider 35 ( FIG. 6).

  And in order to puncture automatically, the piston knob 48 is rotated and the projection part 46a of the piston end part 46 is moved from the latching groove 47b to the advance / retreat groove 47a. As a result, the piston 42 is moved by the biasing force of the coil spring 43, and the slider 35 is also moved to execute automatic puncture (the state of completion of puncture is shown in FIG. 7).

  After the target site has been punctured in this way, the automatic puncture adapter 40 is removed, or the post-puncture inspection process described above is performed as it is.

  As described above, according to the first embodiment of the present invention, an automatic puncture function can be provided by attaching a simple and small automatic puncture adapter 40 to a puncture needle device 30 that does not have an automatic puncture function. It is not necessary to prepare a puncture needle device having an automatic puncture function, which is very advantageous in terms of cost.

  Moreover, since the automatic puncture adapter 40 can be realized with a simple and small configuration such as a cylinder-piston structure, the cost is low, the operation is reliable, and the reliability is high.

  Furthermore, since the length of automatic puncture can be selectively set by the piston end portion 46 and the guide groove 47, versatility and convenience in inspection are high.

  In addition, when the puncture needle device 30 that does not have the automatic puncture function is provided with an automatic puncture function, work such as replacement of the puncture needle device 30 is unnecessary, so that the workability of the inspection can be greatly improved and the inspection can be performed. It can be completed in a short time.

  Next, FIGS. 8 to 10 show a second embodiment of the present invention, FIG. 8 is a perspective view of attaching an automatic puncture adapter to the puncture needle device, FIG. 9 is a partially enlarged view of a gripping portion fixing shaft portion, and FIG. These are operation | movement explanatory drawing of a protrusion length setting board. In the second embodiment, the configuration of the automatic puncture adapter is different from that of the first embodiment. Therefore, only the configuration of the automatic puncture adapter is described with a new reference numeral.

  That is, in FIG. 8, reference numeral 60 denotes an automatic puncture adapter, and this automatic puncture adapter 60 is capable of selectively grasping the operation portion body 34 and the slider 35. A slider gripping part 62, a guide shaft part 63 that slidably supports the operation part main body gripping part 61, and a gripping part fixed shaft part that passes through the operation part main body gripping part 61 and fixes the slider gripping part 62 to the tip side. 64, a plate member 65 that fixes the guide shaft portion 63 and the end of the gripping portion fixing shaft portion 64, and a coil spring provided between the operation portion main body gripping portion 61 and the plate member 65 on the outer periphery of the guide shaft portion 63 66 and is mainly configured.

  The operation portion main body gripping portion 61 is formed in a flat rectangular parallelepiped shape, and one end thereof is formed so as to be capable of gripping the proximal end side end portion of the operation portion main body 34 of the puncture needle device 30. A hole 61a through which the guide shaft 63 is inserted is formed at the other end, and an opening 61b through which the gripping portion fixing shaft 64 is inserted is formed at the center.

  An insertion port 61 c through which the protruding length setting plate 67 is inserted is provided on the side surface of the portion where the opening 61 b of the operation unit main body grip 61 is provided.

  As shown in FIG. 10, the protruding length setting plate 67 is formed in a flat plate shape, and a meridian elongated hole 67 a through which the outer diameter of the gripping portion fixing shaft portion 64 can be inserted is formed at the center. Continuously from the end of the long hole 67a, a narrow hole 67b having a small diameter that can be engaged with a constriction of a sizing part 64a for sizing (see FIG. 9) formed in the holding part fixing shaft part 64 is formed. Has been. In addition, a pair of opposing plates 67 c and 67 c are provided at both ends of the protruding length setting plate 67 in order to prevent the protrusion length setting plate 67 from being detached from the operation unit main body gripping portion 61.

  Therefore, in the automatic puncture adapter 60 according to the second embodiment of the present invention, the operation unit main body gripping portion 61 constitutes the first fixing means, and the slider gripping portion 62, the guide shaft portion 63, the gripping portion fixing shaft portion 64, and The plate member 65 constitutes a second fixing means, the coil spring 66 constitutes an urging means, and the dimension determining notch portion 64a of the gripping portion fixing shaft portion 64 and the protruding length setting plate 67 constitute trigger means. Has been.

  In order to use the automatic puncture adapter 60 configured as described above, first, a dimension for projecting the distal end of the needle tube 32 from the distal end of the sheath 31 to automatically puncture is determined, and the distance between the operation unit main body gripping portion 61 and the plate member 65 is determined. To move the slider gripping portion 62 away from the operation portion main body gripping portion 61.

  Then, the protruding length setting plate 67 is pulled out at the notch portion 64a for determining the dimension of the gripping portion fixing shaft portion 64 closest to the dimension to be automatically punctured, and the protruding length setting plate 67 is inserted into the notch portion for determining dimension 64a. The narrow hole 67b is allowed to pass, and relative movement between the slider gripping portion 62 and the operation portion main body gripping portion 61 is prohibited.

  In this state, the operation portion main body gripping portion 61 of the automatic puncture adapter 60 is securely fixed to the operation portion main body 34, and the slider gripping portion 62 is securely fixed to the middle portion of the slider 35.

  For automatic puncturing, the protruding length setting plate 67 is pushed in, and the engagement between the dimension determining notch portion 64 a and the narrow hole 67 b of the protruding length setting plate 67 is released. Accordingly, the plate member 65 and the gripping portion fixing shaft portion 64 are moved by the urging force of the coil spring 66, and the slider 35 is also moved to execute automatic puncture.

  Thus, after the target site has been punctured, the automatic puncture adapter 60 is removed, or the post-puncture inspection process described above is performed as it is.

  As described above, according to the second embodiment of the present invention, as in the first embodiment, the automatic puncture is performed by attaching the simple and small automatic puncture adapter 60 to the puncture needle device 30 having no automatic puncture function. Since the function can be provided, it is not necessary to prepare a puncture needle device having an automatic puncture function in advance, which is very advantageous in terms of cost.

  Further, since the automatic puncture adapter 60 can be realized with a simple and small configuration, the cost is low, the operation is reliable, and the reliability is high.

  Furthermore, since the length of automatic puncture can be selectively set by the dimension determining notch portion 64a of the gripping portion fixing shaft portion 64 and the protruding length setting plate 67, versatility and convenience in inspection are also high.

  In addition, when the puncture needle device 30 that does not have the automatic puncture function is provided with an automatic puncture function, work such as replacement of the puncture needle device 30 is unnecessary, so that the workability of the inspection can be greatly improved and the inspection can be performed. It can be completed in a short time.

  Next, FIG. 11 is a perspective view of attaching an automatic puncture adapter to a puncture needle device according to a third embodiment of the present invention. In the third embodiment, the configuration of the automatic puncture adapter is different from that of the first embodiment. Therefore, only the configuration of the automatic puncture adapter is described with a new reference numeral.

  That is, in FIG. 11, reference numeral 80 denotes an automatic puncture adapter, and the automatic puncture adapter 80 can selectively hold the torsion spring 81 and the operation unit body 34 provided at one end of the torsion spring 81. It is mainly configured to include a gripping portion 82 and a slider gripping portion 83 that can selectively grip the slider 35 provided at the other end of the torsion spring 81.

  One end of the torsion spring 81 is formed in a bifurcated manner, and the operating portion main body gripping portion 82 is fixed to the tip of the bifurcated portion 81a.

  The other end of the torsion spring 81 is bent at a substantially right angle so as to be guided through the bifurcated portion 81a, and the tip of the bent portion 81b is substantially parallel to the bifurcated portion 81a. A slider gripping part 83 having a fastening screw 84 is provided at the bent end.

  The bent portion 81b of the torsion spring 81 is formed with a saw blade-shaped portion 81c having a gentle tip at the other end and an acute angle at the other end. In addition, a slide locking plate 85 slidably provided along the torsion spring 81 and having a tip engageable with the saw blade-shaped portion 81c is slidably provided at the base end portion of the bifurcated portion 81a. Yes.

  Therefore, in the automatic puncture adapter 80 according to the third embodiment of the present invention, the torsion spring 81 constitutes an urging means, the operation portion main body grasping portion 82 constitutes a first fixing means, and the slider grasping portion 83 constitutes a second fixing means. The fixing means is configured, and the saw blade shape portion 81c and the slide locking plate 85 constitute trigger means.

  In order to use the automatic puncture adapter 80 configured as described above, first, the dimension of the needle tube 32 protruding from the distal end of the sheath 31 to automatically puncture is determined, and the elastic force of the torsion spring 81 is generated. By applying a force in the direction of narrowing the side, the one end and the other end of the torsion spring 81 are separated from each other, and the operation portion main body gripping portion 82 and the slider gripping portion 83 are separated from each other.

  Then, the slide locking plate 85 is slid at the saw blade-shaped portion 81c closest to the dimension to be automatically punctured, and the slide locking plate 85 is engaged with the saw blade-shaped portion 81c, so that the slider gripping portion 83 and the operation portion main body are engaged. Relative movement with the gripping part 82 is prohibited.

  In this state, the operation portion main body gripping portion 82 of the automatic puncture adapter 80 is securely fixed to the operation portion main body 34, and the slider gripping portion 83 is securely fixed to the middle portion of the slider 35 using the tightening screw 84.

  For automatic puncturing, the slide locking plate 85 is slid to release the engagement of the slide locking plate 85 with the saw blade shaped portion 81c. As a result, the slider gripping portion 83 is moved toward the operation portion main body gripping portion 82 by the urging force of the torsion spring 81, and the slider 35 is also moved to execute automatic puncture.

  Thus, after the target site has been punctured, the automatic puncture adapter 80 is removed, or the post-puncture inspection process described above is performed as it is.

  As described above, according to the third embodiment of the present invention, as in the first embodiment, the automatic puncture is performed by attaching the simple and small automatic puncture adapter 80 to the puncture needle device 30 having no automatic puncture function. Since the function can be provided, it is not necessary to prepare a puncture needle device having an automatic puncture function in advance, which is very advantageous in terms of cost.

  Further, since the automatic puncture adapter 80 can be realized with a simple and small configuration, the cost is low, the operation is reliable, and the reliability is high.

  Furthermore, since the length of the automatic puncture can be selectively set by the saw blade shape portion 81c and the slide locking plate 85, versatility and convenience in inspection are also high.

  In addition, when the puncture needle device 30 that does not have the automatic puncture function is provided with an automatic puncture function, work such as replacement of the puncture needle device 30 is unnecessary, so that the workability of the inspection can be greatly improved and the inspection can be performed. It can be completed in a short time.

  Next, FIG. 12 is a perspective view of attaching the automatic puncture adapter to the puncture needle device according to the fourth embodiment of the present invention. The fourth embodiment is different from the third embodiment only in that the operation portion main body gripping portion and the slider gripping portion are interchangeable. The same reference numerals are given to the other same components, and the description thereof is omitted. .

  That is, as shown in FIG. 12, the puncture needle device 90 may be different from the first to third embodiments. In FIG. 12, reference numeral 91 denotes an operation portion main body that supports the proximal end side of the sheath 31, and reference numeral 92 is disposed slidably with respect to the operation portion main body 91, and supports the needle tube 32 to support the needle tube 32. It is a movable slider.

  In such a puncture needle device 90, the outer diameters of the operation section main body 91 and the slider 92 are different from those of the puncture needle device 30 of the first to third embodiments. Even in such a puncture needle device 90, the operation unit main body gripping portion 101 and the slider gripping portion 102 are provided at the tip of the torsion spring 81 so that the automatic puncture adapter 100 can be applied. It can be exchanged and attached via the attachment portion 103 and the slider gripping portion attachment portion 104.

  As described above, if the operation unit main body gripping part and the slider gripping part are replaceable, they can be applied to various types of puncture needle devices, and there is an effect that versatility is enhanced in addition to the effects of the third embodiment. . In the fourth embodiment, the operation unit main body gripping portion and the slider gripping portion of the third embodiment are described as being exchangeable. However, the fourth embodiment can be applied to other first and second embodiments. Needless to say.

1 is a schematic configuration diagram of an ultrasonic endoscope to which a puncture needle device is attached according to a first embodiment of the present invention. The perspective view explaining the structure of the front-end | tip part of an ultrasonic endoscope same as the above. Sectional drawing explaining the whole structure of a puncture needle apparatus same as the above Same as above, perspective view of attaching automatic puncture adapter to puncture needle device Same as above, schematic configuration diagram of an ultrasonic endoscope equipped with a puncture needle device equipped with an automatic puncture adapter Sectional drawing explaining the structure inside an automatic puncture adapter before an automatic puncture same as the above Sectional drawing explaining the structure inside an automatic puncture adapter after an automatic puncture same as the above The perspective view which attaches an automatic puncture adapter to the puncture needle apparatus by 2nd Embodiment of this invention Same as above, partially enlarged view of gripping part fixed shaft part Same as above, operation explanatory diagram of protruding length setting plate The perspective view which attaches an automatic puncture adapter to the puncture needle apparatus by the 3rd Embodiment of this invention The perspective view which attaches an automatic puncture adapter to the puncture needle apparatus by the 4th Embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ultrasound endoscope 2 Insertion part 15 Treatment tool insertion port 16 Treatment tool insertion channel 30 Puncture needle device 31 Sheath 32 Needle tube 33 Cylinder 34 Operation part main body 35 Slider 36 Stylet 40 Automatic puncture adapter 41 Cylinder (first fixing) means)
42 Piston (second fixing means)
43 Coil spring (biasing means)
45 Operation unit body gripping part (first fixing means)
46 Piston end (trigger means)
46a Projection 47 Guide groove (trigger means)
47a Advance / Retreat groove 47b Locking groove 48 Piston knob (trigger means)
49 Slider gripping part (second fixing means)
Agent Patent Attorney Susumu Ito

Claims (6)

A sheath that is inserted into a channel provided in the endoscope;
A needle tube that is inserted into the sheath and the tip of the sheath can project and retract from the tip of the sheath;
An operation unit main body for supporting the proximal end side of the sheath;
A slider that is slidably disposed with respect to the operation unit main body, supports the needle tube, and is movable with the needle tube;
First fixing means that can be selectively fixed to the operation section main body;
A second fixing means that can be selectively fixed to the slider;
With at least the first fixing means fixed to the operation portion main body and the second fixing means fixed to the slider, the first fixing means and the first fixing means in a direction protruding from the distal end of the sheath. Biasing means for biasing the second fixing means relatively;
A puncture needle device for an endoscope, comprising trigger means for executing and suppressing relative movement between the first fixing means and the second fixing means by the biasing means.   The puncture needle device for an endoscope according to claim 1, wherein the trigger means can selectively set the length of the needle tube protruding from the distal end of the sheath.   The first fixing means includes a cylinder and an operation part body gripping part that can selectively grip the operation part body provided in the cylinder, and the second fixing means is operated by the cylinder. A piston and a slider gripper that selectively grips the slider connected to the end of the piston exposed to the outside of the cylinder. The biasing means is provided in the cylinder. The puncture needle device for endoscopes according to claim 1 or 2.   The first fixing means has an operation part main body gripping part capable of selectively gripping the operation part main body, and the second fixing means is slidable on the plate member on the operation part main body gripping part. A guide shaft portion for supporting, and a gripping portion fixing shaft portion that fixes a slider gripping portion capable of selectively gripping the slider to the tip, and the biasing means is connected to the plate member on the outer periphery of the guide shaft portion. The puncture needle device for an endoscope according to claim 1 or 2, wherein the puncture needle device for an endoscope according to claim 1 or 2, wherein the puncture needle device is provided between the operation portion main body gripping portion.   The biasing means is provided with the first fixing means having an operation part main body gripping part which is formed so as to intersect a tip of a torsion spring and can selectively grip the operation part main body at one end of the torsion spring, The puncture for an endoscope according to claim 1 or 2, wherein the second fixing means having a slider gripping portion capable of selectively gripping the slider is provided at the other end of the torsion spring. Needle device.   6. At least one of the operation unit main body gripping part and the slider gripping part can be changed according to the shape of a target to be gripped. Endoscopic puncture needle device.

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