Abstract: A fastener cartridge can comprise fastener cavities arranged in longitudinal rows. A first fastener having a first configuration and a second fastener having a second configuration can be stored within a longitudinal row. First fasteners having a first configuration can be stored within a first longitudinal row and second fasteners having a second configuration can be stored within a second longitudinal row. Each first fastener can have a proximal leg, or leg portion, extending at a first proximal angle and a distal leg, or leg portion, extending at a first distal angle and each second fastener can have a proximal leg, or leg portion, extending at a second proximal angle and a distal leg, or leg portion, extending at a second distal angle. The first proximal angle can be different than the second proximal angle and/or the first distal angle can be different than the second distal angle.

Abstract: A fastener cartridge can comprise fastener cavities arranged in longitudinal rows. A first fastener having a first configuration and a second fastener having a second configuration can be stored within a longitudinal row. First fasteners having a first configuration can be stored within a first longitudinal row and second fasteners having a second configuration can be stored within a second longitudinal row. Each first fastener can have a proximal leg, or leg portion, extending at a first proximal angle and a distal leg, or leg portion, extending at a first distal angle and each second fastener can have a proximal leg, or leg portion, extending at a second proximal angle and a distal leg, or leg portion, extending at a second distal angle. The first proximal angle can be different than the second proximal angle and/or the first distal angle can be different than the second distal angle.

Abstract: A fastener cartridge can comprise fastener cavities arranged in longitudinal rows. A first fastener having a first configuration and a second fastener having a second configuration can be stored within a longitudinal row. First fasteners having a first configuration can be stored within a first longitudinal row and second fasteners having a second configuration can be stored within a second longitudinal row. Each first fastener can have a proximal leg, or leg portion, extending at a first proximal angle and a distal leg, or leg portion, extending at a first distal angle and each second fastener can have a proximal leg, or leg portion, extending at a second proximal angle and a distal leg, or leg portion, extending at a second distal angle. The first proximal angle can be different than the second proximal angle and/or the first distal angle can be different than the second distal angle.

Abstract: A surgical instrument comprises a body, shaft, and end effector. The shaft couples the end effector and body together. The end effector comprises an anvil and lower jaw configured to receive a surgical staple cartridge. The anvil is configured to pivot toward and away from the staple cartridge and lower jaw. The shaft assembly comprises a knife member configured to longitudinally translate to thereby substantially simultaneously cut clamped tissue and staple the severed tissue. The end effector may comprise lockout features configure to prevent longitudinal translation of the knife member. The end effector or staple cartridge may comprise lockout bypass features configured to prevent lockout of the knife member. These lockout bypass features may operate to permit longitudinal translation of the knife member once or multiple times. The end effector may comprise features configured to ensure proper alignment of the anvil relative to the staple cartridge.

Abstract: A method of applying a buttress to a surgical stapler end effector comprises positioning a buttress assembly between an anvil and a staple cartridge of the end effector. The buttress assembly comprises a buttress body and an adhesive material. The adhesive material faces either an underside of the anvil or a deck of the staple cartridge. The anvil is in an open position relative to the staple cartridge during the act of positioning the buttress assembly between the anvil and the staple cartridge. The method further comprises moving the anvil toward the staple cartridge then moving the anvil back to the open position. The buttress assembly is adhered to the underside of the anvil or the deck of the staple cartridge via the adhesive material with the anvil moved back to the open position. The adhesive material comprises a bioabsorbable polymer.

Abstract: A system to perform a bypass procedure performed by an apparatus (100, 400, 600) comprising a steerable body portion (102, 450, 452) and at least one transducer (114, 414) controlled by at least one controller (610). The system may include one or more acts of transluminally detaching at least a portion of a first artery from connective tissue (423) of a chest wall (425) that is attached to the first artery by applying ultrasound signals of a first type emitted by the at least one transducer (114, 414) situated within the first artery; steering the detached portion of the first artery from a current location to a bypass location by applying a force from the steerable body portion, which is located outside of the first artery, to at least a portion of the detached portion of the first artery; and coupling the first artery to a target artery at the bypass location to establish flow communication between the first artery and the target artery.

Abstract: A device and method for performing anastomosis is described. In one embodiment according to the present invention, the device comprises a ring that has a plurality of pins extending from various locations on the ring. During a procedure, the pins are passed through portions of tissue and the ring is everted or radially flipped inside out to connect the tissues together.

Abstract: Disclosed is a peripheral nerve fixing apparatus, which includes: a suction unit configured to provide a negative pressure to a peripheral nerve at an end portion thereof to fix the peripheral nerve; and a negative pressure generating unit having a vacuum pump for generating a negative pressure and connected to the suction unit so that the negative pressure is provided to the suction unit, wherein at one surface of the end portion of the suction unit, the suction unit includes: a fixing unit provided to contact the peripheral nerve to keep a stable fixed state; and a suction hole formed in the fixing unit so that the negative pressure is provided to the peripheral nerve therethrough.

Abstract: A method for operating a surgical instrument, which comprises providing a surgical instrument handle, electrically connecting a controller disposed within the surgical instrument handle to a communication connection of a receiving portion of the surgical instrument, removably securing an interchangeable part at the receiving portion, the interchangeable part having an encryption device electrically connected to the communication connection when the interchangeable part is at the receiving portion, authenticating the interchangeable part upon an exchange between the controller and the encryption device, and after at least a partial use of the interchangeable part, storing within the encryption device a used status of the interchangeable part.

Abstract: A surgical clip includes a pair of opposed arms joined at one end by an integrally formed flexible hinge, which may contain multiple cut-out spaces or finger-like projections and may be severable. A male locking pin near the free end of one arm is configured to penetrate tissue when the male locking pin is urged towards a mating female aperture near the end of the opposite arm. The clamping side of an arm may include a protruding feature, such as a wedge shape elongated ridge, while the clamping side of the opposite arm includes a corresponding trough or aperture that receives the protruding feature. Clamping surfaces may include non-slip protrusions, such as ribs, ridges, cones or pins. Rectangular cross-section alignment guides are provided to maintain clip alignment in the applicator.

Abstract: A surgical ligation clip includes a first jaw, a second jaw, and a hinge portion that pivotably couples the first jaw to the second jaw. The first and second jaws define respective clamping surfaces and include locking elements. The clamping surfaces support retention structure that minimizes movement of the clamp about tissue when the ligation clip is in the clamped position. The locking elements are supported on the first and second jaws and are movable into engagement with each other to retain the ligation clip in the clamped position.

Abstract: An accessory for a VasoStat™ hemostasis device that locks the plunger within the cylinder through which the plunger travels by restricting disengagement of ratcheted wings affixed to the plunger. The accessory may be repositioned or removed so that the ratcheted wings may be disengaged and the plunger may be retracted within the cylinder. When integrated into the plunger, the accessory may be configured to move between a first unlocked position and a second locked position. As a separate component, the accessory is configured to be positioned over and locked into position on the hemostasis device, such as the central stem of the plunger.

Abstract: A medical device has an artificial contractile structure including at least one contractile element adapted to contract a hollow body organ in such a way that said contractile element is adapted to be in a resting position or in an activated position, the activated position being defined with the contractile element constricting the hollow body organ and the resting position being defined with the contractile element not constricting the hollow body organ. The medical device further includes a tensioning device adapted to apply a force so as to tighten the contractile element around the hollow body organ. The medical device further includes a means for eliminating a dead zone of the contractile element when the contractile element is attached around hollow organ with a circumference of the contractile element less than a maximum possible circumference.

Abstract: A medical device has an artificial contractile structure including at least one contractile element adapted to contract a hollow body organ in such a way that said contractile element is adapted to be in a resting position or in an activated position, the activated position being defined with the contractile element constricting the hollow body organ and the resting position being defined with the contractile element not constricting the hollow body organ. The medical device further includes a tensioning device adapted to apply a force so as to tighten the contractile element around the hollow body organ. The contractile element further includes a closure for forming the contractile element into a closed loop around said hollow body organ, the closure having a plurality of lips arranged to engage the contractile element.

Abstract: Disclosed are implantable medical devices for the occlusion of a bodily lumen, cavity, vessel, or organ, as well as methods for manufacturing such occlusion devices, and methods for treating a subject using the occlusion devices. The devices generally include a wire having shape memory properties and a flexible membranous material disposed about the wire. Some embodiments include a lateral fringe on the membranous material. Some embodiments include a fluid capture cup affixed to the wire.

Abstract: A surgical ligation clip includes a first jaw, a second jaw, and a hinge portion that pivotably couples the first jaw to the second jaw. The first and second jaws define respective clamping surfaces and include spaced bosses. Each of the spaced bosses include a transverse portion and a head portion that is oversized and has a diameter that is larger than the diameter of the transverse portions. The oversized head portions allow for the ligation clips to be securely supported on a clip applicator.

Abstract: A method includes inserting into a patient organ a catheter including a position sensor, a device and a handle. The position sensor is attached to a distal end of the catheter. The device is movable along the catheter. The handle includes a control for navigating the device along the catheter to a target location in the patient organ. Based on a location of the position sensor, a target position of the control on the handle that corresponds to the target location of the device is estimated. A marker is set to mark the target position of the control on the handle, and the device is navigated to the target location by setting the control to the marker.

Abstract: Occlusive implants are provided with various embodiments of active and/or passive release structures. Systems for delivering the occlusive implants as well as methods for making and delivering the implants are also provided.

Abstract: A neurovascular occlusion device for occluding a vessel and a delivery system for delivering the occlusion device. The occlusion device can include a self-expandable support structure defining a concave occlusive component and an anchoring component separated by a neck component. The occlusive component can carry a functionally occlusive membrane configured to prevent substantially all fluid from flowing past the occlusion device when the occlusion device is expanded in the vessel.

Abstract: An inflatable compression device configured to apply a compressive force to a puncture site of a patient's vessel, such as an artery is disclosed. The hemostasis device may comprise a location indicium disposed on an inside surface of an inflatable bladder portion of the device so as to be disposed in close proximity to the skin of the patient to improve alignment of the compression device with the puncture site.

Abstract: A compression clip structure includes a first clip, a second clip, a shaft, an elastic member and a fastener. The first clip has a first clamping portion, a mounting portion and a first pivot portion. The second clip has a second clamping portion, a push portion and a second pivot portion. The shaft extends through the first pivot portion and the second pivot portion. The elastic member is mounted on the shaft and provided with two resting portions resting on the first clip and the second clip. The fastener extends through a fitting hole of the push portion and has a pressing portion and a control portion. Thus, the compression clip structure clamps a compression bandage, and the fastener secures the compression clip structure and the compression bandage, so as to stop the bleeding stably.

Abstract: A tourniquet (10; 40) comprising a resiliently deformable strap, towards an end (11) of which is located a fastener (13) arranged for releasable engagement with a portion of the strap spaced from said end (11) so as to form a loop in the strap in use, wherein the strap is elongate in form and is arcuate in cross section.

Abstract: Patient-specific guides for a tibial tubercle osteotomy are provided. The guides include a guide body defining a portion with a bone-engaging surface that conforms as a negative surface to a corresponding surface of a specific patient's tibia, and a guide portion that guides a surgical instrument to a specific location on the specific patient's tibia, wherein the bone-engaging surface and guide portion are configured during a pre-operative planning stage. Methods for performing a tibial tubercle osteotomy with the patient-specific guides are also provided.

Abstract: A method for producing a cutting tool, in particular a drill bit, is specified wherein the cutting tool has a front end (F) at the front and a rear end (R) toward the rear, wherein a tool tip is formed on the front end (F), a point thinning is ground at the tool tip with a grinding tool, the point thinning being ground to be narrower toward the front than toward the rear. The point thinning is ground with a constant point thinning angle (AW). Furthermore, a corresponding cutting tool is specified.

Abstract: A bone graft delivery system includes an elongate tube configured to couple to the handle and receive a bone graft material and a rasp. The rasp includes a lumen configured to receive at least a portion of the elongate tube, a rasping surface configured to decorticate bone, one or more openings configured to deliver bone graft material from the elongate tube when the lumen receives at least a portion of the elongate tube, and a handle portion configured to be gripped in use to facilitate movement of the rasping surface to decorticate bone.

Abstract: A revision is performed on a bone. A first cutting tool is placed over a rod inserted into the bone such that the rod extends through a cannula of the first cutting tool. The inserted rod is curved within the bone. A hole is formed in the bone with the first cutting tool placed over the curved rod.

Abstract: Devices, systems, and methods for locking a drill guide into a polyaxial hole while maintaining the form and function of the polyaxial hole are provided herein. In some embodiments, the drill guide includes a hollow outer body extending from a proximal end to a distal end and having a slot disposed proximate the proximate end, wherein the distal end is configured as a reverse collet having a plurality of prongs; an inner body having a central channel extending therethrough; and a lever coupled to the inner body through the slot, wherein the slot is shaped such that rotation of the lever results in motion along a central axis of the drill guide, and wherein a distal end of the inner body is configured to prevent radially inward deflection of the plurality of prongs when the inner body is in a lowermost position.

Abstract: A cutting assembly for cutting a tapered cut in a hard material includes a cutting tool and a cutting guide, the cutting tool including a cutting profile shaped to enable the creation of a tapered cut in said hard material, the cutting guide co-operating with the cutting tool and including a distal end which fits a cut profile formed by the cutting tool and a cutting guide opening which guides a secondary cutter introduced therein to complete the tapered cut.

Abstract: Irrigation devices, methods, and systems are disclosed. The system comprises a catheter with one or more lumens and an expandable portion. One or more pumps are used to supply a mixture of contrasting and dilating agents in an interior kidney volume and flush a portion of the mixture out of the interior kidney volume. The method comprises placing a catheter into the interior kidney volume through a ureter, occluding a portion of the ureter with a distal end of the catheter, forming an exit port through an exterior kidney surface, flowing the contrasting and dilating agents through the one or more lumens to supply the mixture in the interior kidney volume, and flushing a portion of the mixture out of the exit port.

Abstract: Targeting methods and devices for non-invasive therapy delivery are disclosed. In one embodiment, a method for targeting an object in a body using ultrasound includes: producing a therapy ultrasound waveform configured to fragment or comminute the object in the body using a therapy transducer of an ultrasound probe; and acquiring a sound waveform by a receiver. The sound waveform is at least in part caused by interactions of the therapy ultrasound with the object. The method also includes generating an indication of a targeting accuracy based on the acquired sound waveform.

Abstract: A force transmission with means for winding a first cable onto a first capstan and a second cable onto a second capstan with a first axis of rotation. The first and second cables wound such that when one of the two cables is payed out, the other of the two cables is payed in. The force transmission further includes means for passing the first and cables over an idler pulley in opposite directions. The idler pulley has a second axis of rotation substantially perpendicular to the first axis of rotation. The force transmission further includes means for coupling the first cable to a lever to rotate the lever in a first direction and means for coupling the second cable to the lever to rotate the lever in a second direction opposite the first direction, the lever having a third axis of rotation substantially parallel to the second axis of rotation.

Abstract: A surgical instrument is provided, namely surgical scissors. The surgical instrument has a removable actuating rod which, in conjunction with the clevis and a tube, provides means for securing blades of the scissors. The tube prevents a removable pivot pin of the blades from becoming displaced from the clevis of the instrument. When the actuating rod is removed from the surgical instrument the pivot pin may be removed and, thus, the blades of the scissors may be removed for cleaning and/or replacement. The tube provides the tension and further constrains the scissor blades in a manner which results in the consistent and effective cutting performance of the scissors post assembly.

Abstract: Pixel array medical devices, systems and methods are described for skin grafting and skin resection procedures. The procedures involve applying a scalpet array to a target skin site. The scalpet array comprises scalpets positioned on an investing plate. Skin pixels are circumferentially incised at a target skin site by applying a load via the scalpet array onto subjacent skin surface that includes the target skin site. Incised skin pixels are captured on an adherent substrate, where the incised skin pixels are extruded through the scalpet array. Bases of incised skin pixels extruded through the scalpet array are then transected.

Abstract: A sheath type disposable safety scalpel consists of the blade, handle and sheath, and when the sheath slides forward and backward in relation to the handle, the blade shows the extension and retraction states in the sheath, wherein: the positioning mechanism consists of the button on the sheath and the blade protection locking notch and blade exposure locking notch on the handle, and the unlocking inclined surface is set under the blade protection locking notch and blade protection locking notch, and when the button is pressed and pulled, the locking head touches the unlocking inclined surface and climbs out of the locking notch along the unlocking inclined surface to unlock, so that sheath slides between blade protection locking notch and blade exposure locking notch in relation to the handle. The scalpel breaks the monopolization of traditional positioning mechanism, improves safety of scalpel and improves user hand feeling and sound experience.

Abstract: An ultrasonic surgical instrument that includes an ultrasonic transducer, a handle assembly supporting the ultrasonic transducer, a clamp arm assembly, and a mechanical lockout assembly. The handle assembly includes a housing and an ultrasonic blade acoustically coupled with the ultrasonic transducer. The clamp arm assembly includes a clamp arm. The mechanical lockout assembly is configured to switch between at least an unlocked configuration and a locked configuration. In the locked configuration, the handle assembly and the clamp arm assembly are not completely coupled together and the operator is physically prevented from activating the instrument using an operator input feature. In the unlocked configuration, the clamp arm assembly and the shaft assembly are completely coupled together and the operator is able to activate the instrument using the operator input feature.

Abstract: A waveguide rod for an ultrasonic scalpel having a relatively desirable amplitude and frequency comprises a proximal gain structure, a distal gain structure, an intermediate structure, and a frequency adjustment structure. The proximal gain structure and the intermediate structure are connected in a position near an antinode of longitudinal vibration of the waveguide rod through a proximal side gain step. The distal gain structure and the intermediate structure are connected in a position near an antinode of the longitudinal vibration of the waveguide rod through a distal side gain step. The intermediate structure comprises N (N>0, and N is an integer) gain holding structures that are connected two by two in a position near an antinode of the longitudinal vibration of the waveguide rod through an intermediate gain step. X (X>0, and X is an integer) frequency adjustment structures exist on the gain holding structure.

Abstract: A cardiac ablation method including the following steps: inserting a treatment catheter into an atrium of a heart, the treatment catheter including an ultrasound emitter; positioning the ultrasound emitter to face heart tissue within the left atrium outside of a pulmonary vein; emitting ultrasound energy from the ultrasound emitter while rotating the ultrasound emitter about a rotation axis; and ablating heart tissue with the ultrasound energy to form a lesion outside of a pulmonary vein.

Abstract: An ultrasonic surgical instrument includes a waveguide defining a blade at a distal end thereof and a lumen extending through a portion of the blade. The blade is configured to receive ultrasonic energy for treating tissue. The instrument further includes first and second conduits each defining a proximal end and a distal end. The second conduit is coaxially disposed about the first conduit. The distal ends of the first and second conduits extend into the lumen. The distal end of the first conduit extends further distally into the lumen than the distal end of the second conduit.

Abstract: An ultrasonic surgical instrument and method of assembly with a predetermined alignment includes first and second modular assemblies and an electrical lockout. The first modular assembly includes at least a portion of an end effector configured to manipulate a tissue. The second modular assembly includes a transducer power circuit and an activation switch electrically connected to the transducer power circuit. The electrical lockout is electrically connected to the transducer power circuit and configured to inhibit the activation switch from powering the ultrasonic transducer with the first and second modular assemblies misaligned from the predetermined alignment such that the first and second modular assemblies are in a locked-out state. The electrical lockout is further configured to allow the activation switch to power the ultrasonic transducer with the first and second modular assemblies in the predetermined alignment such that the first and second modular assemblies are in an operational state.

Abstract: An ultrasonic surgical instrument includes a first modular assembly including at least one operator input feature an ultrasonic transducer supported by the first modular assembly, and a second modular assembly configured to be removably coupled with the first modular assembly. The second modular assembly includes at least a portion of an end effector extending distally from a distal end portion of the second modular assembly. The instrument includes a mechanical lockout assembly configured to switch between at least an unlocked configuration and a locked configuration. In the locked configuration, the first modular assembly and the second modular assembly are partially coupled together such that the operator is physically prevented from activating the instrument using the operator input feature. In the unlocked configuration, the first modular assembly and the second modular assembly are completely coupled together and the operator is able to activate the instrument using the operator input feature.

Abstract: An ultrasonic surgical instrument that includes a handle assembly including at least one user input feature; an ultrasonic transducer supported by the handle assembly, a shaft assembly configured to removably couple with the handle assembly, and a mechanical lockout assembly. The shaft assembly includes a distal end portion. The shaft assembly further includes an end effector extending distally from the distal end portion, and an ultrasonic waveguide configured to be acoustically coupled with the ultrasonic transducer. The mechanical lockout assembly is configured to move between at least an unlocked configuration and a locked configuration. In the locked configuration, the handle assembly and the shaft assembly are only partially coupled together physically preventing the user from activating the instrument using the user input feature.

Abstract: An introducer needle assembly including a compressible section between the rigid needle and the hub. Once the vessel is entered as determined by blood entering the syringe, the compressible section of the introducer needed is occluded by compressing the section with the thumb and a finger. Neither blood for air can pass. Since the compressible section is in a flattened area it is easier to hold the needle while the syringe is unscrewed. The operator then can begin threading a guidewire down the divide which is now easier to enter because blood is not coming out of the hub thus obscuring the lumen.

Abstract: In an aspect, a device includes a body structure including a core and a sleeve disposed around at least a portion of the core, the core defining a channel through the core extending from a first end of the core to a second end of the core, the sleeve including a flange adjacent the second end of the core; and a deployable portion coupled to the body structure adjacent the first end of the core, the deployable portion having a wired structure transitionable between a retained configuration and a deployed configuration, wherein a top portion of the wired structure extends beyond the first end of the core in a longitudinal direction when the wired structure is in the retained configuration, and wherein first end of the core extends beyond the top portion of the wired structure when the wired structure is in the deployed configuration.

Abstract: A portable and passive safety intraosseous device to allow for direct introduction of medications, etc., within the intermedullary space of a subject patient's bone or, if needed, the removal of certain substances from such a subject patient's bone. Such a device permits direct drilling and placement of a cannula within the subject bone with access external to the subject patient's skin, permitting, as well, connection of a tube for such introduction/removal purposes. The ability to provide a passive safety unit allows for facilitated utilization in, for instance, emergency situations with the entire device provided for utilization thereof. The device includes a drilling component with a permanently attached stylet and a removable cannula, a power supply for a single drilling operation, a mechanism to draw the stylet back into the drill component after use and disengagement from the cannula, and an automatic closure that activates with the separation of the cannula.

Abstract: A sleeve insertion assembly includes a sleeve inserter defining an inner chamber and having a distal end and a proximal end opposite the distal end, a sleeve receivable within the inner chamber, and a blade guard receivable within the sleeve and having a cylindrical body that defines an interior and an open end. The open end is sized to receive jaw members of an end effector into the interior but prevent the end effector from entering the interior, and the blade guard is forced out of the sleeve when the sleeve is installed on the end effector.

Abstract: A posterior cervical fixation system including an occipital plate member, a cross connector, a pair of elongated spinal rods and a plurality of polyaxial screws. The occipital plate member configured for fixing to an occipital bone comprises an aperture to receive a bone anchor member to secure the occipital plate member to the occipital bone and at least one rod clamping element dimensioned to receive at least one spinal rod. The cross connector secures the pair of elongated spinal rods to vertebral bodies. The cross connector includes a pair of collet connectors and a cross bar that is configured to secure the pair of elongated spinal rods in a desired distance. Each polyaxial screw has an anchor head associated with a fastening member. The pair of elongated spinal rods is configured to extend along the vertebral bodies between the occipital plate member and at least one of the polyaxial screws.

Abstract: A spinal plate that is self-adjusting along its longitudinal axis to accommodate subsidence that may occur and aid in loading the bone graft to promote boney fusion while providing rigid fixation. The spinal plate is configured to inhibit loosening or backing out of bone screws.

Abstract: Lamina plates can include various features that allow a surgeon to couple the plate to a vertebra, such as a plurality of receiving holes for receiving a spinal fixation element. The plate can be shaped and the receiving holes positioned such that spinal fixation elements can be installed with reduced exposure of the spine and along a trajectory that enhances purchase with bone. The lamina plate can include one or more features for coupling at least one receiver head to the plate for receiving a spinal stabilization element. Since the receiver head can be coupled to the plate after the plate is implanted, it does not restrict the range of angles or trajectories at which the spinal fixation elements can be installed.

Abstract: A system for installing a vertebral stabilization system. The system includes an installation tool including a handle portion and a shaft extending distally from the handle portion. The shaft includes a conduit and a staple mechanism. The system also includes a flexible implant member extending along the conduit configured to be advanced out from a distal end of the shaft, and a staple housed in the staple mechanism. The staple is configured to secure the flexible implant member to a vertebra. The handle portion is configured to selectively advance the flexible implant member from the shaft and to selectively actuate the staple mechanism.

Abstract: A femoral nail includes a proximal section, a distal section remote from the proximal section, and an intermediate section disposed between the proximal section and distal section and having first and second curved portions. The first curved portion is positioned closer to the proximal section than the second curved portion. The second curved portion is curved in a first plane, and the first curved portion is curved in the first plane and a second and third plane.