30results about How to "Reduce firing force" patented technology

A surgical stapling device is disclosed for the treatment of internal hemorrhoids. The surgical stapling device includes a handle portion, an elongated body portion and a head portion including an anvil assembly and a shell assembly. The head portion includes an anvil assembly including a tiltable anvil which will tilt automatically after the device has been fired and unapproximated. The tiltable anvil provides a reduced anvil profile to reduce trauma during removal of the device after the anastomoses procedure has been performed. The anvil assembly of the stapling device may include an approximation mechanism having an anvil retainer including an elongated distal extension dimensioned to be telescopingly received within a longitudinal bore of an anvil center rod of the anvil assembly. The elongated distal extension is of a length to provide telescopic engagement with the anvil center rod without obstructing visualization of the surgical site. A kit including a surgical instrument having a removable anvil assembly and an anvil assembly insertion handle is also disclosed. The kit may also include a speculum, an anal dialator and / or an obturator.

This application is directed to a surgical stapling device for performing circular anastomoses. The stapling device includes a retractable trocar which is slidably supported by an anvil retainer and movable from a retracted position located within the anvil retainer to an advanced position extending from the anvil retainer. The trocar defines a sensor and is operatively connected to an indicator assembly. The indicator assembly is operatively associated with an anvil assembly such that the indicator will not move from a fire-not ready position to a fire-ready position until an anvil assembly has been mounted to the anvil retainer.

The invention discloses a nail bin assembly which comprises a nail bin, a nail bin hole and a nail-pushing slice, wherein the nail bin hole is thoroughly arranged on the surface of the nail bin, the nail-pushing slice is arranged in the nail bin hole and can slide relative to the nail bin hole, the transversal surfaces of the nail bin hole and the nail-pushing slice are respectively provided with a pair of long edges, and the distance between the long edges of the nail bin hole is greater than that between the long edges of the nail-pushing slice. The invention has the main beneficial effects that because the nail bin hole and the nail-pushing slice are in point contact, the friction between the nail bin hole and the nail-pushing slice is small, so that the percussive force of the whole nail bin assembly is relatively small.

The present disclosure is directed to a surgical stapling device (10) for performing circular anastomoses. The surgical stapling device includes a handle portion (12), an elongated body portion (14) and a head portion (16) including an anvil assembly (30) and a shell assembly (31). The handle portion (12) includes a rotatable approximation knob (22) for approximating the anvil and shell assemblies (30,31) and a firing trigger (20) for actuating a firing mechanism for ejecting staples positioned within the shell assembly (31). The firing trigger (20) forms one link of a two bar linkage provided to actuate the firing mechanism. The anvil assembly (30) includes a tiltable anvil which will tilt automatically after firing of the device and unapproximating the anvil and shell assemblies (30,31). The head portion (16) also includes a retractable trocar assembly (240) which is slidably positioned within an anvil retainer (38) and is automatically advanced and retracted upon attachment and detachment of the anvil assembly (30) onto the anvil retainer (38). A lockout tube (270) is provided and is positioned about the anvil retainer (38) for releasably engaging an anvil assembly (30). The lockout tube (270) prevents inadvertent detachment of the anvil assembly (30) from the anvil retainer (38). The surgical stapling device (10) also includes a firing lockout assembly which prevents actuation of the firing trigger (20) until an anvil has been attached to the device and the anvil (129) has been approximated. A tactile indication mechanism is also provided for notifying a surgeon that the device has been fired and for notifying a surgeon that the anvil head has been unapproximated a distance sufficient to permit the anvil head to tilt.

Fire-resistant laminate 20 comprises base material 21 and fire-resistant resin layer 22 disposed on at least one side of the base material 21. The fire-resistant resin layer 22 formed of a fire-resistant resin composition, the composition comprising a resin and at least one fire-resistant additive selected from the group consisting of an endothermic agent, a flame retardant, and a thermally expandable layered inorganic matter, and the softening point or melting point of the base material 21 being 300° C. or higher.

The invention relates to a stitching instrument with a cutter, which comprises a support plate, a nail abutting seat, a nail bin, a cutter component, a propelling mechanism and a traction mechanism. The propelling mechanism and the traction mechanism are mounted on the support plate; the propelling mechanism is connected with the nail bin; the cutter component is mounted in an inner cavity of the nail bin and comprises a cutter slider and a cutter connecting steel wire rope; and the traction mechanism comprises a traction steel wire rope which is connected with a free end of the cutter connecting steel wire rope. The stitching instrument with the cutter is a linear type cutting stitching instrument with a sliding cutter, is applicable to the nail bin with the small longitudinal space, and is simple in structure, convenient in assembly and safe in use, triggering force of the stitching instrument is low, stitching nails are formed well, stitching and cutting actions are simultaneously realized by the effect of tension of the traction mechanism, the cutting direction of the stitching instrument is parallel to the direction of a stitching thread, and accordingly the stitching instrument is more applicable to popularization and application.

The invention relates to a staple bin assembly and a stapler using the same. The staple bin assembly comprises a staple bin sleeve, a joint-cutting assembly, a driving assembly, a staple bin and a staple pushing plate, wherein the driving assembly comprises a driving seat and a driving gear; the driving seat can move in the staple bin sleeve in the up-down direction; a guiding column is arranged at the upper end of the driving seat; the driving gear is provided with a chute; the guiding column slides in the chute; the joint-cutting assembly comprises a cutter slider, a staple pushing slider and a cutter toothed ring; the lower part of the cutter slider is a barrel, and the upper end of the cutter slider is a cutting head; the staple pushing plate and the staple pushing slider can be slidably sleeved on the outer side of the barrel of the cutter slider in the up-down direction; the cutter toothed ring is arranged at the bottom of the staple pushing slider; and the lower end of the cutter toothed ring is meshed with the driving gear. A transmission assembly of the stapler can push the driving seat of the staple bin assembly under the action of a trigger. A stitching staple forming effect is good, tissues are cut smoothly, a surgical effect is good, the surgical efficiency is high, and the required triggering force is small; the staple bin assembly is safe and reliable; and the normal surgery can be guaranteed, so that the staple bin assembly and the stapler using the same are suitable to be popularized and used.

The invention discloses a linear cutting anastomat under a bendable endoscope and an assembly of the linear cutting anastomat. The linear cutting anastomat comprises an anastomat jaw, a steering connecting block, an assembly inner core and a cutting knife assembly. The assembly inner core comprises an inner core shell and an inner core connecting block fixedly installed in the inner core shell. The front end of the steering connecting block is hinged to the rear end of the anastomat jaw, a first vertical rotating shaft is formed at the hinged position, the rear end of the steering connecting block is hinged to the front end of the inner core connecting block, and a second vertical rotating shaft is formed at the hinged position. The cutting knife assembly penetrates through the inner core connecting block, the steering connecting block and the anastomat jaw and can slide front and back. On the basis of the double rotating shafts (centers), U-shaped left and right bending pieces are adopted, and the bending process is controlled through steering of the inner core connecting block. Through the arrangement, the bending radius can be increased, the percussion force in the cutting and anastomosis process is reduced, and a doctor has a better operation hand feeling; and meanwhile, a larger bending angle can be achieved, so that a doctor has a better operation space.

The invention relates to an intracavitary straight-cutting push knife mechanism. The intracavitary straight-cutting push knife mechanism is provided with a first cutting blade and a second cutting blade. One of the first cutting blade and the second cutting blade obliquely and downwards extends from front to back, and the other of the first cutting blade and the second cutting blade obliquely and upwards extends from front to back. The rear portion of the first cutting blade and the rear portion of the second cutting blade are intersected to form a V-shaped cutting edge. The intracavitary straight-cutting push knife mechanism uses the V-shaped cutting edge to conduct clipping-type cutting on the tissue. The V-shaped cutting edge structure can make the tissue closed up in the tissue cutting process. The tissue which is not cut off by the front cutting edge is pushed by the first cutting blade 101 and the second cutting blade 102 towards the root portion of the V-shaped cutting edge. Due to the fact that the tissue is already cut open by the first cutting blade 101 and the second cutting blade 102 in advance, the tissue can be easily cut off at the root portion of the V-shaped cutting edge. The percussion force required by forward cutting of the intracavitary straight-cutting push knife mechanism is decreased by adopting the structure, convenience is brought to operation performed by a doctor, and further the operation risk is reduced.

The invention relates to a stitching instrument with a cutter and a cutter component of the stitching instrument with the cutter. The cutter component comprises a cutter slider, a cutter connecting steel wire rope, guiding plates and a fixing block; the cutter slider is provided with the cutter, a triggering plate, a positioning plate, positioning pins, a steel wire rope mounting block and a mounting hole; one end of the cutter connecting steel wire rope penetrates through the mounting hole and is fixed; each guiding plate is provided with a guiding groove, the guiding grooves correspond to the positioning pins, and the cutter slider is slidably mounted between the two guiding plates via the positioning pins; and the fixing block is mounted below the guiding plates and the cutter slider. The cutter component of the stitching instrument with the cutter is mounted in an inner cavity of a nail bin, and the cutter connecting steel wire rope of the cutter component is connected with a traction mechanism. The stitching instrument with the cutter is applicable to the nail bin with the small longitudinal space, and is simple in structure, convenient in assembly and safe in use. The triggering force of the stitching instrument is low, stitching nails are formed well, stitching and cutting actions are simultaneously realized by the effect of tension of the traction mechanism, the cutting direction of the stitching instrument is parallel to the direction of a stitching thread, and accordingly the stitching instrument is more applicable to popularization and application.

The invention discloses a disposable flat pad device in an endoscope cutting anastomat nail bin assembly. The device comprises a rubber tube shell assembled by a rubber tube S and a rubber tube L, therubber tube shell is internally provided with a basic block, a push cutter rod assembly and a flat pad device body, and the push cutter rod assembly is driven by the basic block to move forth and back in the axial direction of the rubber tube shell; the flat pad device body is composed of a plurality of flat pads symmetrically arranged at the two sides of the push cutter rod assembly, each flat pad is made of an elastic material and provided with an arc back part, a first hook pin, a second hook pin and a third hook pin, each first hook pin and the corresponding second hook pin are located atthe two ends of the corresponding back part and extend in the direction away from the corresponding back part, each third hook pin is located between the corresponding first and second hook pins, andthe first hook pins, the second hook pins and the third hook pins are clamped with through holes correspondingly formed in the rubber tube S respectively. Under the condition that when an existing anastomat is in use, the push cutter rod assembly is deformed due to swinging of the end part, and the flat pad device provides a deformed limiting channel, so that the swinging and firing process of the instrument is smoother.

The invention relates to an arc-shaped cutting stitching instrument, which comprises a supporting plate, a jaw bracket, a nail cabin assembly, a nail pressing holder, a connecting assembly, a pushing mechanism and a striking mechanism, wherein corresponding faces of the nail pressing nail holder, the nail cabin assembly and nail pressing holder are arc-shaped. The arc-shaped cutting stitching instrument has the advantages of reduction in instrument size at the same stitching length, smaller striking force of the instrument, and better stitch forming; and the arc-shaped cutting stitching instrument has the advantages of simple structure, convenience in assembling, safety in using, and simultaneous realization of stitching and cutting actions under the action of the striking mechanism.

The invention relates to a pushing cutter rod bending deformation compensation mechanism suitable for a stapler. The pushing cutter rod bending deformation compensation mechanism comprises a pushing cutter rod assembly, a hose part, a connecting part, a base block and a swing block, wherein the connecting part is connected to the left end of the pushing cutter rod assembly, the hose part slidablysleeves the base block to push the pushing cutter rod assembly to move in the axial direction of the hose part, and the swing block is composed of a mounting portion and a compensation function portion; the mounting portion is freely and rotatably arranged on the base block in an inserted mode, an inserting slot is formed in the pushing cutter rod assembly for accommodating the compensation function portion; and thus, when the head swing motion of a jaw occurs, the connecting part rotates correspondingly, at the same time, internal bending elastic deformation of the pushing cutter rod occurs,so that the swing block is driven to perform an adaptive rotational motion about the central axis of the swing block, the situation that the pushing cutter rod assembly abuts against tightly relativeto the base block is avoided, smooth progress of the jaw swing movement is ensured, and the firing force required by an instrument is reduced.

The invention discloses a nail bin assembly of a linear anastomat. Three rows of upper nail cavities and three rows of lower nail cavities are distributed on the upper half portion and the lower halfportion of a nail bin in a staggered mode. Therefore, the maximum force borne by nail pushing particles inserted into the nail cavities in the nail forming process is mutually staggered; the first nail pushing particles are inserted into the first row of nail cavities and the second row of nail cavities at the same time; the second nail pushing particles are inserted into the third row of nail cavities; the gradient of the first inclined surface used for pushing the first nail pushing particles is smaller than that of the second inclined surface used for pushing the second nail pushing particles; therefore, under the condition of generating the same upward thrust, the thrust can be ensured to be uniform; the forward pushing force of the nail pushing block is small; besides, the highest points of the first inclined surface and the second inclined surface on the nail pushing block are staggered; the time for the first nail pushing particle and the second nail pushing particle to reach the highest point can be staggered, the situation that three rows of suturing nails reach the highest point at the same time is avoided, and therefore thrust needed by the nail pushing block is furtherreduced, the whole suturing process is more stable, surgical fatigue of doctors is relieved, and the suturing effect is optimized.

The invention discloses a variable-direction clamp device which comprises a clamp part, a first fixing seat and a second fixing seat. The clamp part comprises a horizontal fixing rod, a pushback pin and a setting tooth, wherein the pushback pin is arranged on the upper portion of the horizontal fixing rod, and the setting tooth is arranged on the lower portion of the setting tooth. Two ends of thehorizontal fixing rod are rotatably fixed between the first fixing seat and the second fixing seat, two spring pieces symmetrically arranged on two sides of the clamp part are further arranged between the first fixing seat and the second fixing seat, elastic ends of the two spring pieces contact with the pushback pin, and the elastic action of the spring pieces on the two sides of the pushback pin is applied to the pushback pin to realize return and clamp actions of the setting tooth when the setting tooth swings in a variable-direction manner. The invention further discloses an endoscopic anastomat comprising the clamp device. The clamp device is arranged above an initial clamp slot of a push rack, and an elastic collision bead is arranged at the tail end of the push rack. By improving the clamp device, the clamp part of the clamp device can change along the moving direction of the push rack, and the trigger force and the reset force of an instrument are decreased. The elastic collision bead is additionally arranged to increase reset field angle, so that reset is more accurate and reliable.

The invention relates to a stitching instrument with a cutter and a cutter component of the stitching instrument with the cutter. The cutter component comprises a cutter slider, a cutter connecting steel wire rope, guiding plates and a fixing block; the cutter slider is provided with the cutter, a triggering plate, a positioning plate, positioning pins, a steel wire rope mounting block and a mounting hole; one end of the cutter connecting steel wire rope penetrates through the mounting hole and is fixed; each guiding plate is provided with a guiding groove, the guiding grooves correspond to the positioning pins, and the cutter slider is slidably mounted between the two guiding plates via the positioning pins; and the fixing block is mounted below the guiding plates and the cutter slider. The cutter component of the stitching instrument with the cutter is mounted in an inner cavity of a nail bin, and the cutter connecting steel wire rope of the cutter component is connected with a traction mechanism. The stitching instrument with the cutter is applicable to the nail bin with the small longitudinal space, and is simple in structure, convenient in assembly and safe in use. The triggering force of the stitching instrument is low, stitching nails are formed well, stitching and cutting actions are simultaneously realized by the effect of tension of the traction mechanism, the cutting direction of the stitching instrument is parallel to the direction of a stitching thread, and accordingly the stitching instrument is more applicable to popularization and application.

The invention relates to a suturing and cutting device for endoscopic surgery. The suturing and cutting device comprises a body, a nail head part, a push part and a swing mechanism. The near end of the nail head part is connected with the far end of the body through the swing mechanism, and therefore the nail head part can swing in the longitudinal direction relative to the axial direction of the body. The near end of the push part is located in the body and stretches into the nail head part in the axial direction of the body, a first slot allowing the push part to be inserted therein is formed in the near end of the nail head part, the hole diameter of the first slot is gradually reduced from the near end to the far end, and therefore the push part can swing in the first slot in the longitudinal direction relative to the nail head part. According to the suturing and cutting device for the endoscopic surgery, when the instrument swings, the push part cannot suffer from approximately bending or mutant deformation at the switch-over position of the instrument, progressive transition exists, therefore, smooth bending is formed, resistance generated during percussion is reduced, percussion force needed during percussion is reduced, and an operator can obtain better experience.

The invention discloses a direction-changeable clamp. The clamp comprises a clamping part, a first fixing seat and a second fixing seat, wherein the clamping part comprises a horizontal fixing rod anda back push rod and moving teeth arranged at the upper part and the lower part of the horizontal fixing rod, two ends of the horizontal fixing rod are rotationally fixed between the first fixing seatand the second fixing seat, two elastic pieces which are symmetrically arranged on two sides of the clamping part are also arranged between the first fixing seat and the second fixing seat, elastic ends of the two elastic pieces make contact with the back push rod, when the moving teeth changes direction to swing, the back push rod realizes resetting and clamping actions of the moving teeth underthe elastic action of elastic pieces on two sides of the back push rod. The invention further discloses an endoscope stapler comprising the clamp. The clamp is arranged above an initial clamping groove of a push rack, and an elastic touch ball is arranged at the tail end of the push rack. By improvement of the clamp, the clamping part of the clamp can realize the effect of reducing percussion force and resetting force of an instrument with change of moving direction of the push rack. The elastic touch ball is also arranged to increase resetting opening angles, so that resetting is more precise and reliable.

A bottom rolling piece is selectively arranged at the bottom of the nail pushing sliding block in the direction perpendicular to the moving direction of the nail pushing sliding block, the bottom rolling piece is matched with the inner surface of a nail box base on the anastomat, a top rolling piece is selectively arranged on the working face of the nail pushing sliding block, and the top rolling piece is matched with the inclined face of the lower end of a nail pusher on the anastomat. A rolling module matched with a long groove formed in a nail bin of the anastomat is selectively arranged on the nail pushing sliding block, at least one of the bottom rolling piece, the top rolling piece and the rolling module is arranged, when the nail pushing sliding block moves in the longitudinal axis direction of the nail box base, rolling friction is generated between the nail pushing sliding block and the nail box base, rolling friction is generated between the nail pushing sliding block and the nail pusher, and the nail box base and the nail pusher can move in the longitudinal axis direction of the nail box base. Rolling friction is generated between the nail pushing sliding block and the inner side wall of the long groove. The friction force between the nail pushing sliding block and the nail box base, the nail bin and the nail pusher is reduced in a rolling mode, the percussion force of instruments is reduced, the structure is simple, manufacturing is convenient, and the nail pushing device is used for linear cutting, laparoscopic cutting anastomats and the like.

The invention relates to an arc-shaped cutting stitching instrument, which comprises a supporting plate, a jaw bracket, a nail cabin assembly, a nail pressing holder, a connecting assembly, a pushing mechanism and a striking mechanism, wherein corresponding faces of the nail pressing nail holder, the nail cabin assembly and nail pressing holder are arc-shaped. The arc-shaped cutting stitching instrument has the advantages of reduction in instrument size at the same stitching length, smaller striking force of the instrument, and better stitch forming; and the arc-shaped cutting stitching instrument has the advantages of simple structure, convenience in assembling, safety in using, and simultaneous realization of stitching and cutting actions under the action of the striking mechanism.

According to the end executor and the linear anastomat, by arranging the nail pushing assembly and the percussion assembly, when the end executor is closed, the percussion assembly drives the nail pushing assembly to move, so that suturing nails in the nail bin are sequentially percussed, and the problems of large heads, small heads, dovetail and the like are solved. Therefore, the end executor and the linear anastomat adopt a sequential nailing mode, the required percussion force can be saved, the nail anvil is prevented from deforming, and a good nailing effect, a good suturing effect and good surgical safety are achieved.