Abstract: A self-sealing introducer is disclosed that allows easy introduction of a catheter into a working channel of a surgical instrument while minimizing fluid leakage before, during and after catheter insertion.

Abstract: A medical manipulator which includes: a plurality of arms formed in a cylindrical shape a distal end portion of which is made of a rigid member having a bending portion capable of bending; an insertion portion made of a rigid member having a plurality of channels in which base ends of the plurality of arms are connected to a distal end of the insertion portion so as to connect lumens of the arms to the plurality of channels; a photographic device provided at the distal end of the insertion portion; an operation portion that operates the bending portion; and a transmission member that connects the bending portion and the operation portion, in which the bending portion has: a first bending portion that is capable of bending in a predetermined direction by an operation of the operation portion, and a second bending portion provided in a base end than the first bending portion that is capable of fixing the plurality of arms in a bent state so as to mutually separate, and the transmission portion has: a first regi

Abstract: A translumenal access device may comprise a cannula defining a first lumen and a hollow needle. The hollow needle may be positioned within the cannula. The hollow needle may comprise a first portion including a sharpened rigid distal portion with a first column strength. The hollow needle also may comprise a second portion including a floppy portion with a second column strength. The second portion may be disposed just proximal to the first portion. The first column strength may be greater than the second column strength. The first column strength may be sufficient to penetrate tissue. The second column strength may allow the second portion to buckle to prevent the hollow needle from further penetrating tissue.

Abstract: Various embodiments of a surgical device and methods of using the surgical device are disclosed. The surgical device may comprise a collar configured to fit over a distal face of an endoscope and rotate about a longitudinal axis of the endoscope. The surgical device may also comprise a flexible, elongate translating mechanism coupled to the collar and extending proximally from the collar. Applying a linear force to the translating mechanism may cause the translating mechanism to exert a rotational force on the collar. In addition, the surgical device may comprise a hollow cap coupled to a distal end of the collar. The cap may be pivotable relative to the collar in a plane parallel to the axis. In addition, the cap may have a first open end configured to face the endoscope and a second open end configured to face distally.

Abstract: The inside of a cylindrical body is divided into two parts, that is, a first and a second chamber, and in a piston body, a first ventilation hole and a first ventilation path of a pushing portion are formed so as to communicate with the first chamber and a second ventilation hole and a second ventilation path of the pushing portion are formed to communicate with the second chamber, and a spring for returning the piston body to its original position is provided. By pressing the pushing portion while closing the first ventilation port so as to advance the piston body, air is supplied through a syringe port on the first chamber, while by pressing the pushing portion while closing the second ventilation port, air is supplied through the syringe port on the second chamber, and by releasing the pushing operation, the piston body automatically returns to the original position.

Abstract: In an endoscope therapeutic device having a plurality of introduction guide tubes for introducing a treatment tool into a body cavity, the introduction guide tubes are mutually joined at a position more proximal than bending portions thereof. Accordingly, the effects caused by the movement of the plurality of the introduction guide tubes are mutually invalidated at a joint portion as a fulcrum, so that the position of the introduction guide tube is relatively stabilized in the body cavity. As joining methods, there are integration, usage of a joint tool, and usage of an over tube. The operability is improved when the introduction guide tube is provided at the distal end thereof with a mechanism for retaining and/or rotating a distal end of a treatment tool inserted therethrough.

Abstract: A translumenal access device may comprise a catheter, an inflatable member, a hollow needle, a stylet, and a guide wire. The catheter may comprise at least one first lumen and at least one second lumen. The at least one first lumen may be configured to slidably receive the guide wire from the proximal end to the distal end of the catheter. The inflatable member may be mounted near the distal end of the catheter, and may be in fluid communication with second lumen. The hollow needle may be mounted on the distal end of the catheter. The hollow needle may be mounted distal to the inflatable member. The stylet may comprise a third lumen and may be configured to be slidably disposed within the hollow needle. The sylet has at least one extended position and at least one retracted position.

Abstract: A device for manipulating body tissue comprises a base structure and at least one tubular member having a proximal end and an orientable distal end that defines a seat for supporting a surgical instrument, in which the tubular member is connected to the base structure. An actuation mechanism is suitable for orientating the distal end of the tubular member to take it into certain operative configurations. The actuation mechanism is also connected to the base structure. Means are also foreseen for the connection of the base structure to a distal end portion of an insertion tube of an endoscope or laparoscope, so that the actuation mechanism and the tubular member are arranged outside the insertion tube. The tubular member interacts with the actuation mechanism so that a movement of an actuation portion of the tubular member with respect to the base structure leads to the orientation of the orientable end.

Abstract: Endoscopic surgical operation method includes: a step of lifting a living tissue including an diseased tissue located distally relative to an operation channel of an endoscope inserted through a natural orifice; a step of suturing a proximal region and a distal region of the living tissue positioned basal relative to the diseased tissue lifted by a suturing means section projecting distally from the operation channel of the endoscope after the lifting; and a step of resecting the living tissue between the sutured regions and the diseased tissue endoscopically after suturing the proximal region and the distal region of the living tissue surrounding the diseased tissue.

Abstract: Apparatus, system, and method for use with an endoscope are disclosed. A flexible overtube having a proximal end and a distal end defines a hollow lumen therebetween to receive a flexible shaft portion of an endoscope therein. The proximal end of the flexible overtube is configured to remain outside of a patient and the distal end is configured to enter the patient through a natural orifice. At least one fluid tight seal is located at the proximal end of the flexible overtube to prevent leakage of fluids around the flexible shaft of the endoscope when the flexible shaft of the endoscope is positioned within the flexible overtube. The system further includes a flexible endoscope. The method includes introducing the system into a patient though a natural orifice of the patient and performing an endoscopic translumenal procedure.

Abstract: When an operation instruction is input by a first (second) control output instruction input device, locus calculation means calculates a locus of movement of a first (second) therapeutic device on the basis of any one of joint sections, which is instructed to operate. On the basis of a calculation result by the locus calculation means, therapeutic device operation control means controls an operation of the first (second) therapeutic device by a first (second) active mechanism. Thereby, there is provided an endoscope apparatus which can improve the operational efficiency and positional precision of the therapeutic device.

Abstract: An endoscope apparatus includes an accessory including an actuation portion configured to be actuated, an operating unit for operating the actuation portion, an endoscope including an accessory insertion pass wherein the accessory is adapted to be inserted through the accessory insertion pass from a proximal end portion of the accessory insertion pass to a distal end portion of the accessory insertion pass, and projected from and retracted into the distal end portion of the accessory insertion pass, a detecting unit configured to detect a condition of a part of the accessory, which is projected from the distal end portion of the accessory insertion pass, and a control unit configured to control an actuation of the actuation portion by an operation to the operating detecting unit.

Abstract: A wire guide holder having a body for securing an elongate medical wire or tube, such as a wire guide or catheter. The body is adapted to be attached to a scope or a bite block. The body can be provided with protrusions and/or grooves for holding a wire guide. The wire guide holder may be affixed to the medical scope by clamping. The wire guide holder can also be provided with a seal.

Abstract: An endoscope apparatus according to the present invention includes an insertion portion having a distal end portion and at least two channels; an optical observation system provided on one surface of the distal end portion so as to face an axial direction different from a direction of an insertion axis X of the insertion portion; a first channel opening provided on one surface of the distal end portion near the optical observation system; an ultrasound transducer array provided on the one surface of the distal end portion and having a scanning surface Z parallel to the insertion axis; and a second channel opening provided on a proximal end side of the ultrasound transducer array.

Abstract: An endoscope sheath, comprising: an endoscope housing, configured for housing at least a distal end of an insertion tube of an endoscope and allowing the traversing of an endoscopic tool therethrough; and a tool deflector configured for deflecting said endoscopic tool by changing a direction of movement of said endoscopic tool in relation to a direction of movement of said distal end of said insertion tube.

Abstract: An endoscopic tissue anchor deployment device includes a handle, an elongated shaft defining an internal lumen, and an end effector attached to the distal end of the elongated shaft. A tissue anchor catheter is removably inserted through the lumen of the elongated shaft, the catheter having a tissue anchor assembly that is deployable from its distal end. In some embodiments, the handle includes a pin and track assembly that define a series of handle actuation steps corresponding to deployment steps for the deployment device end effector and the tissue anchor catheter. In some embodiments, the handle includes a catheter stop member that prevents movement of the tissue anchor catheter under certain circumstances, and a handle stop member that prevents actuation of the handle under certain circumstances.

Abstract: Described herein are methods and devices for performing endoscopic retrograde cholangiopancreatography (ERCP). A system comprising an elongate body housing a front-viewing endoscope and a tissue grasping instrument can be used to facilitate the insertion of a catheter into the ampulla of Vater. The distal end of the elongate body can be positioned such that the operator of the system can view the ampulla while manipulating the surrounding tissue to ease cannulation of the opening with the catheter. As a result, the procedure can be performed faster and more reliably than in the past.

Abstract: A capsule medical apparatus includes a needle driving unit that punctures an internal region of a subject with an injection needle and pulls out the injection needle from the internal region, a liquid injection unit that injects a liquid into the internal region through the injection needle, and a leak prevention unit that prevents the liquid that is injected into the internal region from leaking from the internal region.

Abstract: A specimen retrieval device may comprise the specimen retrieval bag for retrieval biological materials, a hybrid shaft, a first collapsible arm, and a second collapsible arm. The hybrid shaft may comprise a proximal end and a distal end, wherein the distal end is flexible, and wherein the proximal end is rigid. The first collapsible arm may be located at the distal end of the hybrid shaft, and may include a first portion. The second collapsible arm may be located at the distal end of the hybrid shaft, may include a first portion and a second portion. The second portion of the second collapsible arm may extend distally beyond the first portion of the second collapsible arm. The specimen retrieval bag may have an open end and a closed end, and may be configured to be retained upon the first collapsible arm and the second collapsible arm.

Abstract: In an endoscopic system, when an affected area of a biomedical tissue in an image is treated with a scalpel and a holding pair of forceps which movably extend from a distal portion of an endoscope through the endoscope while the image taken by the endoscope in a body cavity in a time-series manner is being observed, a treatment is performed in which the holding pair of forceps holds the affected area detached from the biomedical tissue by the scalpel. When any motion is detected in the distal portion of the endoscope included in the image, a motion direction and a motion amount of the distal portion of the endoscope attributed to the motion are detected, and the distal portion of the endoscope is curved to return the scalpel to an original treatment position.

Abstract: A surgical device for use with an endoscope. The device includes an end cap removably affixable to a distal end of the endoscope such that at least a portion of the end cap distally extends beyond the distal end of the endoscope. The end cap defines a through bore for receiving the distal end of the endoscope, and the end cap includes an outer surface defining first and second tracks substantially perpendicular to a longitudinal axis of the through bore. The device further includes a first working channel having a distal end disposed in the first track and movable along a length of the first track between a first position and a second position. The device further includes a second working channel having a distal end disposed in the second track and movable along a length of the second track between a first position and a second position.

Abstract: An endoscopic surgical apparatus includes a treatment accessory configured to be inserted through a channel of an endoscope, including a treatment portion with a treatment function, and having a movement function, a setting unit configured to set a reference position as a reference in treatment by the treatment accessory and a reference direction relative to the reference position, a detecting unit configured to detect a movement state of the treatment accessory in the reference direction relative to the reference position, a control unit configured to control the movement function or the treatment function on the basis of the movement state.

Abstract: An endoscope device comprising: an elongated tubular insertion part; a plurality of arm members which is provided in the distal portion of the insertion part so as to protrude forward and is capable of treatment with a treatment tool inserted thereinto; an observation main body provided in the distal portion of the insertion part so as to freely separate from the insertion part; an energization member which energizes the observation main body disposed within the distal portion of the insertion part toward the direction opposite to the plurality of the arm members in the radial direction of the insertion part; and a holding mechanism which resists the energization member to hold the observation main body in a state where the observation main body is disposed within the distal portion of the insertion part and is capable of releasing the holding state.

Abstract: A medical system includes an insertion device to be inserted into a body cavity and including a channel extending between a distal end portion of the insertion device and a proximal end portion thereof and a proximal end opening portion connected with a proximal end portion of the channel, a treatment device to be inserted into the channel from the proximal end opening portion and to be inserted through the channel, and including an actuating portion provided at a distal end portion of the treatment device, a coupling portion provided at a proximal end portion of the treatment device, and a transmitting portion extending between the actuating portion and the coupling portion and to transmit a driving force applied to the coupling portion to the actuating portion, a driving device including a coupling accepting portion to be coupled with the coupling portion and a driving mechanism to drive the coupling portion coupled with the coupling accepting portion, and a guide mechanism including a guide member to be ar

Abstract: A translumenal access system includes a translumenal access catheter, a trocar, and one or more guidewires. The trocar may be introduced through adjacent tissue layers, typically from an endoscope, and the translumenal access catheter introduced through the resulting penetration over the trocar. A balloon on the catheter may be used to dilate the penetration, and an enlarged distal portion of the balloon may be used to draw the tissue layers into apposition. The first stent may be exchanged for the trocar and a second stent may be introduced through a side port on the access catheter. The stents may be then used to introduced catheters or other interventional tools, optionally for delivering one or more stents to the enlarged tissue penetration.

Abstract: A guide system for use with an endoscope, and a method of use is disclosed. The guide system can include a track, in the form of a rail, and a mating member for engaging the rail. The guide system can also include an accessory, such as an accessory guide tube through which a medical instrument can be carried external of the endoscope. An end cap can be provided to support the track relative to the distal end of the endoscope.

Abstract: An apparatus for imparting motion from at least one of a plurality of motion sources into linear, rotary, or combined linear and rotary motion of an elongated device, the apparatus comprising a transmission for translating the motion to linear or rotary motion of the elongated device.

Abstract: A method for performing a hybrid laparoscopic-endoscopic procedure is achieved by inserting a medical instrument laparoscopically through an abdominal wall and into a gastric cavity, inserting an overtube and endoscope transorally into the gastric cavity to provide an access path to the gastric cavity, passing an end effector transorally to the surgical site translumenally within the endoscope, and attaching the end effector to a distal end of the medical instrument while the instrument is positioned within the gastric cavity.

Abstract: An overtube includes: an endoscope insertion portion passing hole through which an insertion portion of an endoscope is passed; and at least one manipulator passing hole through which a manipulator insertion portion of a manipulator apparatus is passed. The manipulator insertion portion includes a driving portion which has at least one first joint and one second joint rotating clockwise and counterclockwise. The endoscope insertion portion passing hole includes an endoscope protrusion amount determination portion which determines a length of a protrusion of the endoscope; and an observation optical system observation direction determination portion which determines an observation direction of the endoscope.

Abstract: The present embodiments provide apparatus and methods suitable for facilitating positioning one or more medical components. In one embodiment, the apparatus comprises a rail member having proximal and distal ends and a generally longitudinal axis. A first connector is adapted to be selectively coupled to the rail member, and a first medical component is adapted to be coupled to the first connector. The first connector is disposed for selective longitudinal movement along the rail member, thereby permitting movement of the first medical component with respect to the rail member. In this manner, one or more components, such as a catheter and a needle, may be inserted into a human or animal body in a controlled fashion with respect to one another.

Abstract: Devices and methods are disclosed for less invasive surgery. More particularly, methods and devices described herein permit improved access within a body cavity when performing a minimally invasive procedure, typically through a small opening, a surgical port, or during an open surgical procedure.

Abstract: An articulatable, steerable tool guide includes a maneuverable head subassembly, a flexible or rigid insertion tube subassembly, and a handle subassembly. The tool guide defines at least one inner lumen extending through the length of the tool guide, with each such lumen being adapted to receive a flexible endoscopic medical device.

Abstract: A medical treatment system including an endoscope, a treatment tool that is inserted in a channel of the endoscope, and a holder that holds the treatment tool in a manner that enables a user who operates the endoscope to move the treatment tool forward and backward and rotate the treatment tool, with the treatment tool having a treatment portion that performs treatment on a living body; a wire for operating the treatment portion whose distal end is connected to the treatment portion; a sheath portion that has a first sheath that is formed with a coil and in which the wire is inserted in a manner capable of moving forward and backward in the axial direction, and a second sheath that is formed with a coil of a plurality of layers and provided on the outside of the first sheath; and an operating portion to which the base end of the wire is connected and enables forward/backward and rotation operation of the wire; and with the holder holding the operating portion so as to be in a predetermined positional relation

Abstract: An endoscope treatment instrument provided with a flexible transmitting member, a treatment portion that is attached to the distal end of the transmitting member, and an actuator which is attached to the proximal end of the transmitting member and is for operating the treatment portion, this endoscope treatment instrument being designed to transmit the action of the actuator to the treatment portion via the transmitting member. The transmitting member consists of the connection in the longitudinal direction of a first coil sheath that has excellent rotation follow-up and good relative bending properties, and a second coil sheath that has excellent rotation follow-up and good ease of motion in the relative longitudinal direction.

Abstract: An endoscope comprises: an insertion tube to be inserted into a body cavity, the insertion tube including a hard distal end portion, a curving portion continuous with the hard distal end portion, and a flexible portion continuous with the curving portion; a contained part of the insertion tube which is accommodated at least inside the curving portion; and at least one movement regulating member which extends inside the curving portion and adapted to regulate at least radial movement of the contained part, one end portion of the position regulating member passing through a rear connecting portion connecting the curving portion and the flexible portion to extend to the flexible portion side, a section of a portion of the movement regulating member inserted into the flexible portion from the rear connecting portion being smaller than a section of a portion of the movement regulating member within the curving portion.

Abstract: In a mucosa excising device using an endoscope according to the present invention, engagement pieces are provided in the vicinity of a claw portion formed at an end edge of a cap, the engagement pieces press the snare wire arranged along the claw portion, both the claw portion and the engagement pieces hold the snare wire, and the snare wire of a high-frequency snare is prevented from accidentally coming off at the time of insertion into a body cavity or during a treatment in the body cavity when conducting endoscopic mucosal resection.

Abstract: Medical systems, devices and methods are provided for accessing a bodily opening that, among other things, are safe and reliable, and facilitate manipulation of a medical instrument. The medical access device generally includes an elongated flexible sheath and a port connected to the distal end of the flexible sheath. The sheath defines a sheath lumen and a longitudinal axis. The port has an interior surface defining a passageway and an exterior surface that is tapered in a distal direction. The passageway is in communication with the sheath lumen. The exterior surface of the port defines a radially opening channel sized to receive at least a portion of the tissue therein.

Abstract: An endoscope assembly including an endoscope, a selectably inflatable balloon mounted onto a distal portion of the endoscope and an external tube extending alongside the endoscope and traversing the selectably inflatable balloon.

Abstract: A drainage tube retainer 1 as an endoscopic treatment instrument includes a guide catheter 10 for slidably supporting a drainage tube 6 retained in a live organ through a channel; a pusher tube 11 disposed in the exterior of the guide catheter 10 and slidably supported by the guide catheter 10; and a pusher cap 13 provided to the pusher tube 11 for positioning the pusher tube 11 relative to the endoscope so that a direction in which the pusher tube 11 is inserted through the channel substantially coincides with a direction in which the guide catheter 10 is retracted from the pusher tube 11.

Abstract: An endoscope system comprises multiple types of treatment tools including a treatment-tool insertion unit, and a function unit having a function for performing treatment; an electrically-driven operation device which electrically drives the function unit; an electrically-driven advance/retreat device which electrically drives the treatment-tool insertion unit; a control device including at least one of a control unit for outputting a control signal to the electrically-driven advance/retreat device and the electrically-driven operation device, and an operating program corresponding to a treatment tool; and an operation instructing device including a first operating instruction unit for outputting an instruction signal for placing the electrically-driven operation device and the electrically-driven advance/retreat device into a manually-driven operating state, and a second operating instruction unit for outputting an instruction signal for placing the electrically-driven operation device and the electrically-dr

Abstract: An endoscope treatment tool insertion-extraction system is provided with an endoscope having a forceps channel, and a treatment tool unit having a treatment tool that can be inserted and extracted through the forceps channel; and the treatment tool unit is provided with an insertion-extraction mechanism which carries out feeding into or drawing out of the treatment tool through the forceps channel, and a driving section that drives this insertion-extraction mechanism.

Abstract: Endoscopic biopsy forceps as one of endoscopic treatment tools of the present invention include a flexible insertion section. The proximal end portion of the insertion section is received in an operating section. A closely wound coil is exposed to the proximal end portion of the insertion section, and the proximal end portion of the coil is enlarged in diameter to form an enlarged-diameter portion. A protrusion is formed in an operation section body, and the enlarged-diameter portion of the coil is locked by the protrusion to restrict the movement of the coil, thereby preventing slipping off of the insertion section.

Abstract: A manipulator operation system includes a treatment instrument distal end movement control section having an endoscope treatment instrument having a bending portion and a distal end portion, a bending driving section and a bending operating section. The manipulator operation system includes imaging mechanism having an imaging section that includes an optical system having a field curvature, images, observing mechanism having a display section that displays a taken image, detecting mechanism having a detecting section that detects an arrangement position of the distal end portion, field curvature information acquiring mechanism having a field curvature information acquiring section that acquires field curvature information of the taken image, and adjusting mechanism having an adjustment section that adjusts a ratio of an operation amount of the bending operating section and a driving amount of the bending driving section based on the arrangement position and the field curvature information.

Abstract: Balloon cannula systems may be used for accessing and visualizing the spine and related methods of treatment, including a forward-looking balloon system for creating a working space and the balloon system having atraumatic dissection capability to allow visualization in spine. The devices and methods described may be used, for example, to perform annulus repair, herniated disc excision, and denervation of neurological tissue; to dispense pharmacological agents and/or cell or tissue therapy agents; to diagnose disc degeneration and bony degeneration, spinal stenosis, and nucleus decompression, and to perform disc augmentation.

Abstract: In an endoscopic treatment instrument having a plurality of sheaths, a supporting member for directly and indirectly supporting the plurality of sheaths, and a connecting member for directly/indirectly bringing the sheaths and an endoscope in a connected state are provided. The supporting member constrains a relative position of the plurality of sheaths and the connecting member can change the connecting state. Therefore, when an operator changes the connecting state of the connecting member, the positional relation of the endoscope and the plurality of sheaths can be changed, while the positional relation of the plurality of sheaths is still constrained. Accordingly, for example, left and right sheaths can be easily exchanged.

Abstract: A surgical instrument adapted for use during transanal endoscopy is disclosed. The surgical instrument has a shaft having a proximal end and distal end. A working part, for example a scissors or gripper, is attached to the distal end of the shaft, and a handle potion is attached to proximal end of the shaft. The handle portion is actuatable to actuate said working part via a force transmission member. The shaft further includes a linear insertion portion having a longitudinal axis. The proximal end of the shaft is laterally displaced relative to the longitudinal axis of the insertion portion. This configuration increases the ability to manipulate and actuate the surgical instrument during a transanal endoscopic procedure or similar surgical procedure.

Abstract: An endoscope treatment instrument provided with an inserted portion that is flexible, a treatment portion that is attached to the distal end of the inserted portion, an operator portion that is attached to the proximal end of the inserted portion for manipulating the treatment portion, and a transmitting member that is connected to the treatment portion and the operator portion and is inserted into the inserted portion, for transmitting the operation of the operator portion to the treatment portion; wherein: the operator portion has a first handle that is attached to the inserted portion so as to prevent movement in the axial direction of the inserted portion, a second handle that is attached to the first handle so as to permit rotation, a linking member in which its first end is attached to the second handle so as to permit rotation, and its second end is connected to the transmitting member, and a positional relationship maintaining mechanism which can maintain the positional relationship between the lin

Abstract: Devices and methods for detachably engaging an insertion section of an endoscope and selectively articulating an endoscopic surgical access channel are provided. A device comprises an articulating main body having a stationary first body, an articulatable second body, and coupler having a mounting member and an articulation link member configured to articulatively couple the second body to the first body. The stationary first body has a distal end, a proximal end, and a first longitudinal axis. The articulatable second body has a proximal opening and a distal opening defining an accessory channel member passageway, the distal opening having a second longitudinal axis oriented toward a space exterior to the first body distal end, wherein the second body longitudinal axis is capable of articulating relative to the first body longitudinal axis.

Abstract: An enhanced flexibility auxiliary endoscope assembly for use with an endoscope, the assembly including at least one flexible elongate element and a flexible sleeve having a first lumen for accommodating a distal portion of an endoscope capable of assuming at least a first curvature and a second lumen for accommodating the at least one flexible elongate element, the second lumen being configured to allow the at least one flexible elongate element to assume the at least first curvature as well as at least a second curvature about the first curvature, thereby to enhance flexibility of the auxiliary endoscope assembly.

Abstract: An injection needle for an endoscope includes an insertion portion including, an outer tube, and an inner tube movably arranged forward and backward within the outer tube, and which has a coil member and a needle body fixed to a distal portion of the inner tube, and an operating portion which is fixed to the outer tube and for operating to move the inner tube forward and backward, wherein the coil member is fitted on and is anchored to a portion opposed to a tip of the needle body, and the inner tube is fitted on and anchored to the coil member.