Abstract: Various embodiments of a device are shown and disclosed for closing a vascular access puncture site following percutaneous diagnostic or therapeutic interventional procedures. The vascular closure device is configured to safely and accurately deploy a sealing material that undergoes a phase change when deployed inside the tissue tract. The sealing material may be a solid at room temperature and a liquid or gel at body temperature. Also, the sealing material may change from a liquid or gel to a cubic phase when it comes into contact with bodily fluids.

Abstract: Surgical instrument with a manual control device for actuation with a hand, wherein the control device can be displaced between a closed position and an opened position and the control device has: a finger lever with a first point of articulation and a second point of articulation, a central element with a third point of articulation and a fourth point of articulation, a connecting lever, which is pivotably arranged at the first point of articulation and at the third point of articulation, and a thumb lever, which is pivotably arranged at the second point of articulation and at the fourth point of articulation.

Abstract: A surgical apparatus providing access to an underlying body cavity through a tissue tract articulates a flexible surgical object inserted therein. The surgical apparatus includes a tube member defining a longitudinal axis and a lumen therethrough to receive the flexible surgical object. The tube member includes a proximal member, a middle member connected to the proximal member at a first joint, and a distal member connected to the middle member at a second joint. The surgical apparatus also includes articulation mechanisms to articulate the tube member.

Abstract: A syringe assembly includes a first syringe having a syringe outer cylinder filled with a first liquid, and a gasket; a second syringe having a syringe outer cylinder filled with a second liquid, and a gasket; and a pusher assembly which performs a pushing operation of collectively moving the gaskets and. The pusher assembly includes a first pusher having a distal portion connected to the gasket; a second pusher branching from the first pusher, extending distally, having a distal portion connected to the gasket; and an operation section which is provided on a proximal-side extension line of the first pusher and is operated for the pushing operation.

Abstract: An applicator is disclosed, which includes a nozzle, the nozzle including a gas channel through which a gas G flows, a plurality of liquid channels which are provided inside the gas channel and through which each of a first liquid and a second liquid flows, and a confluence portion which is located on a downstream side of the liquid channels and in which the flows of the liquids join. Of the gas channel, a portion between the liquid channels and the confluence portion is configured from a single gas-permeable tube composed of a gas-permeable membrane permeable to the gas but impermeable to the liquids. The gas-permeable tube is independently connected to the liquid channels, and has a first independent channel and a second independent channel through which the first liquid and the second liquid flow toward the confluence portion together with the gas flowing in through the gas-permeable membrane.

Abstract: The wound protector has an annularly collapsible distal ring, an expansion member and a flexible sleeve extending between the distal ring and expansion member. After positioning of the distal ring in a wound, movement of the expansion member into an extended state expands the sleeve while drawing the sleeve tight against the wound and the expansion member against the patient.

Abstract: A method for securing a sleeve in a bore hole in bone. The method includes disposing at least a portion of a length of filament into the bore hole, and implanting the sleeve into the bore hole such that a first pathway extending through first and second ends of the sleeve opens in a direction toward the opening of the bore hole and in a direction toward the base of the bore hole. The method also includes pulling at least a portion of the length of filament through the first pathway of the sleeve, thereby forming a first loop configuration extending from the first end and at least one free end of the length of filament extending from the second end. Also included is passing the at least one free end through the first loop configuration to create a one-way cinch.

Abstract: Methods and devices are provided for anchoring a ligament or tendon to bone. In one embodiment, a surgical implant is provided having a sheath and an expander that is received within the sheath. Various delivery tools, including a sheath inserter and a driver, are also provided. In use, the sheath inserter can be used to position a tendon within a prepared bone hole, and it can be used to deliver the sheath with a guidewire coupled thereto into the bone hole. The driver can be provided for delivering the expander into the sheath. A loader can optionally be used to load the driver and expander onto the guidewire coupled to the implanted sheath.

Abstract: Methods and devices are provided for anchoring a ligament or tendon to bone. In particular, various delivery tools, including a variety of sheath inserter tools, are provided. The tools can be used to position a tendon within a prepared bone hole, and to deliver a sheath into the bone hole.

Abstract: An implantable device and various systems and methods related to the device are disclosed. The implantable device has a bone implant component configured to be secured to at least one bone of a patient with at least one recess therein. The bone implant component is configured to allow a suture anchor to be disposed within the recess and has a restriction therein that is engageable by the suture anchor to retain the suture anchor within the bone implant component. Methods for implanting a suture anchor in the implantable device are also disclosed.

Abstract: A fixation device, comprises an elongated element extending along a central axis, having a total length L and including a proximal section formed of a material that is substantially non-absorbent for electromagnetic radiation within a preselected wavelength range and a distal section formed of a material that is substantially non-absorbent for electromagnetic radiation within the preselected wavelength range in combination with a middle section axially arranged between the proximal and distal sections, the middle section formed of a material that is substantially absorbent for electromagnetic radiation in the preselected wavelength range.

Abstract: An end effector for use with a surgical apparatus. The end effector comprising a staple cartridge having a tissue contacting surface defining a central longitudinal slot and an anvil plate having a tissue contacting surface defining a central longitudinal slot. A surgical buttress releasably disposed on the tissue contacting surfaces of each of the staple cartridge and anvil plate. An adhesive tape is disposed over the central longitudinal slot of each of the staple cartridge and anvil plate and configured retain the respective surgical buttress atop the respective tissue contacting surface.

Abstract: A surgical instrument includes a handle assembly, a surgical loading unit, and an adapter assembly coupled therebetween. The adapter assembly includes a housing, an elongated body, a switch assembly, and a switch actuator. The elongated body extends distally from the housing and is configured to be coupled to the surgical loading unit. The switch assembly is disposed within the housing and configured to communicate that the surgical loading unit is coupled to the elongated body. The switch assembly includes a substrate, a switch mounted on the substrate, and at least one wire coupled to the substrate. The switch actuator is movably disposed within the housing and configured to actuate the switch upon engagement of the surgical loading unit with the elongated body.

Abstract: A receiving assembly for releasably coupling a loading unit to an adapter while preventing inadvertent actuation of the loading unit includes a load link, a tip housing, and a locking member. The load link includes a distal portion and the tip housing defines a longitudinal slot and a lock opening. The locking member includes a member body and a locking tab extending from a lower surface thereof. The member body is disposed within the longitudinal slot of the tip housing. The locking member is moveable between an unlocked position such that the locking tab is positioned within the lock opening and a locked position such that the locking tab extends from the lock opening. The distal portion of the load link engages the member body of the locking member to pivot the locking member from the unlocked position to the locked position.

Abstract: Medical tape containing hooks or rings is applied to both sides of a wound and the application of medical lace or elastic bands having a physiologic pull are then applied for superior closure.

Abstract: A medical instrument comprising: (A) a first joint comprising a first member and a second member, the first member configured to be repositionable with respect to the second member in an X-Y plane; (B) a second joint operatively coupled to the first joint, the second joint comprising a third member and a fourth member, the third member configured to be repositionable with respect to the fourth member in a Y-Z plane perpendicular to the X-Y plane; and, (C) a controller operatively coupled to the first joint and the second joint, the controller including a first control configured to direct repositioning of at least one of the first member and the second member, and a second control configured to direct repositioning of at least one of the third member and the fourth member.

Abstract: A surgical clip applicator includes a universal handgrip and an individual clip magazine having an integrated crimping head, which individual clip magazine can be detachably fastened to the universal handgrip. The universal handgrip and the individual clip magazine fastened thereto interact to form a feed path for the clip transport of individual clips from a clip receiving portion of the clip magazine toward the crimping head, which feed path is defined or individually available for actuation. The individual clip magazine can be selected from a plurality of clip magazines for different clip types as needed. The clip magazine can include an integrated coding mechanism designed depending on the clip type to be applied, which coding mechanism defines in interaction with the universal handgrip at least the feed path adapted to the respective clip type.

Abstract: In various embodiments, a surgical stapling head is provided that may comprise a staple cartridge for supporting one or more staples, a core movable relative to the staple cartridge, at least one staple driver extending from the core, and a casing configured to at least partially hold the staple cartridge and movably receive the core and the staple driver(s). The casing may further comprise at least one retention member that is configured to move from a first position to a second position when sufficient external force is applied to the retention member, such as that provided by a shaft of a surgical stapler during insertion of the stapling head assembly into the shaft. When the retention member(s) are at the second position, the staple driver(s) may be prevented from driving staples from the staple cartridge, thereby providing a firing lockout feature to the stapling head assembly during insertion into at least a portion of a surgical stapler.

Abstract: Magnetically actuated gating devices, magnetically actuated gating systems, magnetically actuated gating kits, and methods of treatment using a magnetically actuated gating device are described herein. An example embodiment of a magnetically actuated gating device comprises a housing, a rotatable member, a compression member, and a membrane. The rotatable member has a first magnetic field that is configured to interact with a second magnetic field produced by an external element to move the rotatable member between a first position and a second position.

Abstract: A handle assembly for a clip applier includes a housing having a stationary handle and a barrel supported on the stationary handle. The barrel defines a lumen having a proximal portion and a distal portion configured to releasably receive an adapter assembly. A is operably coupled to the housing and includes a gripping portion and a stem portion movable distally through the proximal portion of the lumen in response to movement of the gripping portion towards the stationary handle. A plunger assembly is removably positionable within the proximal portion of the lumen and configured to operably couple the stem portion with an adapter assembly such that distal movement of the stem portion actuates the adapter assembly. A plug is removably engagable within the proximal end of the barrel to retain the stem portion, the plunger assembly, and the adapter assembly in operable relation relative to one another.

Abstract: A medical instrument comprising: (A) a first joint comprising a first member and a second member, the first member configured to be repositionable with respect to the second member in an X-Y plane; (B) a second joint operatively coupled to the first joint, the second joint comprising a third member and a fourth member, the third member configured to be repositionable with respect to the fourth member in a Y-Z plane perpendicular to the X-Y plane; and, (C) a controller operatively coupled to the first joint and the second joint, the controller including a first control configured to direct repositioning of at least one of the first member and the second member, and a second control configured to direct repositioning of at least one of the third member and the fourth member.

Abstract: A lung volume reduction system is disclosed comprising an implantable device adapted to be delivered to a lung airway of a patient in a delivery configuration and to change to a deployed configuration to bend the lung airway. The invention also discloses a method of bending a lung airway of a patient comprising inserting a device into the airway in a delivery configuration and bending the device into a deployed configuration, thereby bending the airway.

Abstract: Non-expandable space-occupying devices for treating voids within the body are disclosed. The devices can have multiple non-expandable space-occupying elements connected to a flexible leader. Methods of making and using the devices are also disclosed.

Abstract: The present invention relates to devices and methods for the treatment of diseases in the vasculature, and more specifically, devices and methods for treatment of aneurysms found in blood vessels. In a first embodiment of the present invention, a two part prostheses. where one part is an expandable sponge structure and the other part is an expandable tubular mesh structure, is provided. In the first embodiment, the expandable sponge structure is intended to fill the aneurysm cavity to prevent further dilatation of the vessel wall by creating a buffer or barrier between the pressurized pulsating blood flow and the thinning vessel wall. In the first embodiment, the expandable tubular mesh structure is placed across the aneurysm, contacting the inner wall of healthy vessel proximal and distal to the aneurysm.

Abstract: The present invention is an apparatus for releasably constricting one or more objects, and in particular to a restricting blood to an injured appendage comprising an elongate band and capture device that cooperate to form a releasable, adjustable loop. A release lever and a parallel thumb mount are compressed to release the elongate band from the capture device, where the thumb mount is configured to remain fixed while the release lever rotates about a fulcrum bar to disengage a projection that locks the size of the loop.

Abstract: A device for use in joint replacement surgery is disclosed, the device may comprise a patient-specific jig having a body formed using three dimensional data corresponding to a first resection surface of a bone of a patient according to a preoperative plan. The body may also include a first bone facing surface configured to match the first resection surface of the bone of the patient according to the three dimensional data and an alignment perimeter sized and shaped to match a perimeter of the resection surface of the bone of the patient according to the three dimensional data.

Abstract: A medical device and collection method are disclosed which can effectively aspirate and remove substances collected inside a filter, and prevent the collected substances from dropping down from a filter portion. The collection method includes inserting a medical device having a filter portion in a contracted state into the living body lumen, installing the filter portion in the living body lumen by bringing the filter portion into the expanded state; collecting the substances inside the living body lumen using the filter portion; inserting an aspiration catheter which applies an aspiration force to a distal opening via a lumen formed inside the aspiration catheter, into the living body lumen along the shaft portion, and fitting the distal opening into the concave portion of the filter portion; aspirating the substances collected inside the concave portion using the aspiration catheter; and removing the filter portion from the inside of the living body lumen.

Abstract: A clot retrieval device 1 for removing occlusive clot from a blood vessel, the device comprises an inner elongate body 3 having a collapsed delivery configuration and an expanded deployed configuration and an outer elongate body 2 at least partially overlying the inner elongate body 2. The outer elongate body 2 is expandable to a radial extent which is greater than the radial extent of the inner body 3 in the deployed configuration to define a clot reception space 11. The outer elongate body 2 comprises a distal end portion 24,49 and the inner elongate body 3 comprises a main body portion 10 and a distal portion which extends in the deployed configuration towards the outer elongate body 2 to a greater extent than the main body portion. The distal portion 10 of the inner elongate member 3 and the distal end portion 24,49 of the outer elongate body 2 together define a three dimensional protective structure to substantially prevent distal egress of clot or clot fragments from the device.

Abstract: A clot retrieval device 1 for removing occlusive clot from a blood vessel, the device comprises an inner elongate body 3 having a collapsed delivery configuration and an expanded deployed configuration and an outer elongate body 2 at least partially overlying the inner elongate body 2. The outer elongate body 2 is expandable to a radial extent which is greater than the radial extent of the inner body 3 in the deployed configuration to define a clot reception space 11. The outer elongate body 2 comprises a distal end portion 24,49 and the inner elongate body 3 comprises a main body portion 10 and a distal portion which extends in the deployed configuration towards the outer elongate body 2 to a greater extent than the main body portion. The distal portion 10 of the inner elongate member 3 and the distal end portion 24,49 of the outer elongate body 2 together define a three dimensional protective structure to substantially prevent distal egress of clot or clot fragments from the device.

Abstract: A clot retrieval device 1 for removing occlusive clot from a blood vessel, the device comprises an inner elongate body 3 having a collapsed delivery configuration and an expanded deployed configuration and an outer elongate body 2 at least partially overlying the inner elongate body 2. The outer elongate body 2 is expandable to a radial extent which is greater than the radial extent of the inner body 3 in the deployed configuration to define a clot reception space 11. The outer elongate body 2 comprises a distal end portion 24,49 and the inner elongate body 3 comprises a main body portion 10 and a distal portion which extends in the deployed configuration towards the outer elongate body 2 to a greater extent than the main body portion. The distal portion 10 of the inner elongate member 3 and the distal end portion 24,49 of the outer elongate body 2 together define a three dimensional protective structure to substantially prevent distal egress of clot or clot fragments from the device.

Abstract: A device and method for intravascular treatment of an embolism, and particularly a pulmonary embolism, is disclosed herein. One aspect of the present technology, for example, is directed toward a clot treatment device that includes a support member configured to extend through a delivery catheter and a plurality of clot engagement members positioned about the circumference of a distal portion of the support member. The individual clot engagement members can have a first portion and a second portion extending from the first portion, and the first portions can have a proximal region attached to the support member. In the deployed state, the individual second portions can extend from the distal region of one of the first portions and project radially outwardly relative to the support member in a curve that has a proximally extending section which defines a proximally facing concave portion.

Abstract: Described herein are methods and apparatus for detecting stones by ultrasound, in which the ultrasound reflections from a stone are preferentially selected and accentuated relative to the ultrasound reflections from blood or tissue. Also described herein are methods and apparatus for applying pushing ultrasound to in vivo stones or other objects, to facilitate the removal of such in vivo objects.

Abstract: The teachings herein provide an instrument comprising a forceps. The forceps comprise a hand piece; a tubular member connected to the hand piece; and a jaw assembly connected to the hand piece. The jaw assembly includes a first jaw element and a second jaw element. The first jaw element includes a gripping section and a flexing section. The flexing section includes an arcuate section. The second jaw element opposes the first jaw element and includes a gripping section. The tubular member is moveable onto the arcuate section of the first jaw element so that the flexing section of the first jaw element is flexed and the as assembly is moved into a closed position. The first jaw element, the second jaw element, or both include a stiffening spine so that the as assembly is substantially rigid in the closed position.

Abstract: A surgical apparatus which includes a handpiece having a passage. The retention assembly includes a pair of radially movable buttons, aligned in axially extending passages in communication with the passage and can engage with and cause rotational movement of a collet member assembly rotatably supported in the passage. The collet assembly includes rolling lock members which can be moved by the collet member from a lock position, in which the lock members are forced by the wall of the passage to extend inwardly of the collet member and an unlocked position, in which the lock members are aligned with a recess in the wall of the passage and are not forced to extend inwardly of the collet member. The surgical apparatus may find particular use with irrigation fluid, suction, and powering of a surgical tool. The passage may include a cutting blade retention assembly integrated in the passage.

Abstract: A surgical instrument including a reusable and sterilizable hub assembly and a releasably connectable disposable blade assembly allows multiple reuse of the hub assembly in conjunction with single use disposable blade assemblies.

Abstract: A surgical grooved director including a fixed or removable handle with a tubular member having a lumen extending therethrough with an aperture at its proximal end and a blunt dissecting distal tip. An access window is formed through the wall of the tubular member in a distal portion of the instrument and is in communication with the lumen. An integral side rail is integrally mounted on the tubular member and defines a linear groove adapted to receive and allow slideable movement of a knife.

Abstract: An ultrasonic surgical instrument is provided which includes a handle assembly, a body extending distally from the handle assembly and an end effector configured to effect cutting, dissection, coagulation and/or ligation of tissue. The end effector includes an ultrasonic member. A transducer is supported adjacent, on or within the ultrasonic member and is connected to a power source. Upon actuation of the power source, the transducer effects vibration of the ultrasonic member. In one preferred embodiment, the end effector is mounted for articulation about the distal end of the instrument.

Abstract: An ultrasonic surgical instrument includes a shaft, a first jaw having a proximal end at the distal end of the shaft, a second jaw and an ultrasonic waveguide. The first jaw has an internal trough running through the proximal end of the first jaw and a surface on either side of the trough. The second jaw has a surface facing the surface of the first jaw. The waveguide extends beyond the shaft and slidably engages the trough and has a blade with a tissue compressing surface upwardly sloping proximally from a distal end thereof the blade and having an upper portion and a substantially horizontal top surface portion at the upper portion. The tissue compressing surface and/or the top surface portion forms a cutting surface. When the jaws compress tissue therebetween, the blade slides within the trough to further compress and cut the compressed tissue as the blade moves distally.

Abstract: A cutting balloon catheter and methods for making and using the same. The cutting balloon catheter may include a catheter shaft having a balloon coupled thereto. One or more cutting members or blades may be coupled to the balloon. Manufacturing the cutting balloon catheter may include partially submerging or embedding a cutting member within a joining member and attaching the joining member to a balloon. The cutting member may include one or more slots along its base that can interlock with the joining member.

Abstract: An intravascular device is provided having a catheter tube and an expandable portion including a plurality of struts supported in a cantilevered fashion so as to be splayed open when in an opened position. An incising element is provided on at least one of the struts and has a sharpened edge for creating an incision in atherosclerotic material located within a blood vessel when the expandable portion is in the opened position.

Abstract: A thrombus aspiration catheter is disclosed which can shear a thrombus and efficiently aspirate the thrombus. When the pressure of the inside of an inner tube is made negative, an outer tube is rotated around an axis relative to the inner tube, and an inner opening portion and an outer opening portion are positioned at an open position at which the inner opening portion and the outer opening portion overlap each other, a thrombus enters the inside of the inner tube through the inner opening portion and the outer opening portion. When the outer tube is further rotated up to a closed position at which the whole outer opening portion does not overlap the inner opening portion, the thrombus is sheared by an edge portion of the inner opening portion and an edge portion of the outer opening portion and into the inside of the inner tube.

Abstract: An angio catheter for hemodialysis is disclosed. The angio catheter comprises a steel cylindrical element for introducing into a patient's blood vessel. The invention also includes a needle including a first lumen and a second lumen, each lumen hermetically separate from the other, wherein the needle is located within the cylindrical element. The invention further includes a first tube for supplying fluid to or from the first lumen and a second tube for supplying fluid to or from the second lumen, wherein fluid may flow within the first lumen independently from fluid flowing within the second lumen. The invention also includes a first flange extending perpendicularly from both sides of the cylindrical element and a second flange extending perpendicularly from both sides of an offset neck of the needle.

Abstract: A device that uses an anatomic landmark or fiduciary point to establish a point of origin for device orientation in space is provided. The device controls the direction and depth of delivery of a needle, wire, trocar or cannula utilized for diagnostic or therapeutic intervention. The device guides the percutaneous delivery of a needle, wire, trocar or cannula to a target spatial location on or within tissue.

Abstract: A method of amputating and morcellating a uterus (10) includes introducing a first tissue bag (1) into the abdomen of the patient, and placing the first tissue bag over the uterus. A laparoscopic surgical instrument (11) is introduced into the first tissue bag, and the uterus (10) is amputated using the laparoscopic surgical instrument. The first tissue bag (1) is closed around the amputated uterus, and the first tissue bag containing the amputated uterus is placed into a second tissue bag (20). A morcellating instrument is introduced into the second tissue bag (20) and the uterus is morcellated within the second tissue bag. Once the uterus (10) has been morcellated, the second tissue bag (20) containing the morcellated uterus is removed from the abdomen of the patient.

Abstract: The present invention relates to egg chambers for use in collection, inspection and selection of eggs for in vitro fertilisation (IVF) procedures. The egg chamber, in use, provides an effectively closed and fluid filled system which minimises the environmental changes that a harvested egg is exposed to, thus maximising viability. The egg chamber comprises a vessel which can be made airtight, comprising at least one side wall, an upper wall and a lower wall, at least a portion of the upper wall being transparent and at least a portion of the lower wall being light permeable; a first inlet with a sealable port; a first outlet with a sealable port; a filter with a pore size appropriate for egg collection disposed within the vessel between the first inlet and the first outlet and configured to separate the vessel into a first internal chamber and a second internal chamber.

Abstract: A tool for implementing a correction plan in an external fixation frame having a plurality of adjustment elements or screws, for example, generally includes a driver, a motor, a controller, and a processor. The driver is adapted to engage and rotate each of the screws. The motor is coupled the driver and adapted to rotate the driver. The controller is connected to the motor and configured to control operation of the motor. The controller may determine whether the tool is engaged with a strut and which strut is engaged, and may determine how much the strut has rotated, taking into account intentional or unintentional manual rotation of the tool. The tool may also include features to help ensure proper engagement between the drive and the strut. Variations may be provided in which similar functionality is provided with manual rotation of a motorless tool.

Abstract: A bone fixation system is provided. The bone fixation system includes a receiver coupled to a bone fastener. The receiver includes an inner bore and channel that provides a seat for an elongate fixation rod. The inner surface of the receiver includes locations for an instrument to securely grasp the receiver from the inside of the receiver without obstructing the inner bore. The instrument is provided with hooks that uniquely grasp the receiver from the inside and outside of the receiver. The instrument also includes flexible prongs configured to engage recesses formed in the outer surface of the receiver. The prongs have prong extensions that conform in shape to the recesses. The prongs and recesses have three separated perimeter surfaces each having a component perpendicular to the longitudinal axis. The bone fixation system provides a strong connection between the screw and the instrument for the demands unique to spinal surgery.

Abstract: According to some embodiments, systems and methods are provided for non-invasively detecting the force generated by a non-invasively adjustable implantable medical device and/or a change in dimension of a non-invasively adjustable implantable medical device. Some of the systems include a non-invasively adjustable implant, which includes a driven magnet, and an external adjustment device, which includes one or more driving magnets and one or more Hall effect sensors. The Hall effect sensors of the external adjustment device are configured to detect changes in the magnetic field between the driven magnet of the non-invasively adjustable implant and the driving magnet(s) of the external adjustment device. Changes in the magnetic fields may be used to calculate the force generated by and/or a change in dimension of the non-invasively adjustable implantable medical device.

Abstract: A spinal implant system comprises at least one first member including an inner surface defining an implant cavity. A second member is configured to penetrate tissue and includes an inner surface defining a cavity. A third member is engageable with the inner surfaces to resist and/or prevent movement of the second member relative to the first member. Fasteners, instruments and methods are disclosed.

Abstract: An extender is removed from a spinal implant without using a separate device, and the loss of materials to be discarded is reduced. A head part of a spinal implant includes a base part, which is provided as a portion on a screw part side, and a pair of tab parts, which extend from the base part to an opposite side to the screw part side. The pair of tab parts have a tab part-side engagement part to be engaged by an extender-side engagement part that is formed on the extender. A weak part is formed between the base part and the pair of tab parts, the weak part being configured to be broken by an external force from the extender engaged with the pair of tab parts and separate the pair of tab parts from the base part.