CN111374729A - Medical anastomat - Google Patents

Abstract

The invention provides a medical anastomat, which comprises an anastomat body, a trigger mechanism and a control mechanism, wherein the anastomat body comprises a shell and a trigger mechanism; an anvil assembly movable in an axial direction of the stapler body; make the firing mechanism in the not firing state and the switching safety mechanism of the state of can firing, and the safety mechanism has: the safety component is provided with a first position area which enables the firing mechanism to be in a non-firing state and a second position area which enables the firing mechanism to be in a firing state; the transmission piece is used for acting on the transmission piece when the anvil component moves towards the near end, so that the safety component is driven to move from the first position area to the second position area; the transverse guide structure is used for guiding the transverse movement of the safety component along the anastomat body; the anastomosis nail forming device can effectively prevent a doctor from firing anastomosis nails and a cutter under the condition that the anvil component is not closed in place, so that poor anastomosis nail forming is caused, and even medical accidents are caused; the transverse guide structure for guiding the transverse movement of the safety component is arranged, so that the movement stability of the safety component is enhanced.

Description

Medical anastomat

Technical Field

The invention relates to the field of medical instruments, in particular to a medical anastomat.

Background

The medical anastomat is a medical instrument frequently used for performing surgical suture cutting on physiological tissues such as esophagus, intestinal tract and the like and foreskin and the like, two sections of tissues are converged during anastomosis, an annular anastomosis ring is formed in the tissues, the medical anastomat can enable organism bleeding generated in the surgical process to be discharged along with contents, and the tissues are easy to heal after the surgery.

The existing medical anastomat for treating alimentary canal, redundant prepuce and the like generally comprises an anastomat body, a firing handle rotationally connected with the anastomat body, and an anvil component arranged at the far end of the anastomat body. The anastomat body comprises a shell, a nail bin assembly and a nail pushing rod, wherein the nail bin assembly is arranged at the far end of the shell and matched with the anvil assembly, and the nail pushing rod is arranged in the shell and linked with the firing handle.

When the anvil assembly is closed in place, the medical stapler reaches a cocked state. In the prior art, a general operator judges whether a medical anastomat reaches a cocked state or not according to the sense of the operator, and performs the cocking of an anastomosis nail and a cutter after the medical anastomat reaches the cocked state.

On one hand, however, an operator judges the shape completely according to his own feeling and experience, which easily causes the anvil component to be closed in place so as to cause poor staple forming; on the other hand, some careless or inexperienced doctors may accidentally fire the staples and the knife when the anvil assembly is not closed in place, resulting in poor staple formation and even medical accidents.

In view of the above, there is a need to provide a new medical stapler to solve the above problems.

Disclosure of Invention

The invention aims to provide a medical anastomat.

In order to achieve the purpose, the invention adopts the following technical scheme: a medical stapler, comprising:

the anastomat body comprises a shell and a firing mechanism which is arranged on the shell in a matching way;

an anvil assembly movable in an axial direction of the stapler body;

the movable safety mechanism that locates anvil subassembly with between the firing mechanism, safety mechanism makes the firing mechanism switch between can not the firing state and the firing state, just safety mechanism has:

the safety component is movably arranged in the shell and is provided with a first position area which enables the trigger mechanism to be in a non-trigger state and a second position area which enables the trigger mechanism to be in a trigger state;

the transmission piece is arranged between the anvil component and the safety component, and the anvil component acts on the transmission piece in the process of moving the anvil component towards the near end direction, and drives the safety component to move from the first position area to the second position area by driving the transmission piece to move;

the transverse guide structure is used for guiding the safety component to move between the first position area and the second position area along the transverse direction of the anastomat body.

As a further improved technical solution of the present invention, the transverse guiding structure includes a first guiding member disposed on the housing and a second guiding member disposed on the safety assembly, and the first guiding member and the second guiding member cooperate with each other to enable the safety assembly to move along the transverse direction of the stapler body.

As a further improved technical solution of the present invention, the first guiding member and the second guiding member are a sliding slot and a sliding block, which are matched with each other, the sliding slot extends along a transverse direction of the stapler body, and the sliding block is disposed on the safety component.

As a further improved technical scheme of the invention, the safety mechanism is provided with a marking part, and the shell is provided with an observation port for exposing the marking part to observe the position of the safety mechanism.

As a further improved technical solution of the present invention, the marking part includes a first marking part and a second marking part different from the first marking part, the first marking part is exposed from the viewing port when the safety mechanism is located in the first position region; when the safety mechanism is located in the second position area, the second mark part is exposed from the observation port.

As a further improved technical solution of the present invention, the first marking portion is red, and the second marking portion is green.

As a further improved technical solution of the present invention, the marking portion is provided on the slider.

As a further improved technical solution of the present invention, the first position area is closer to the axis of the stapler body than the second position area; the safety assembly is provided with a base and a locking part connected to the base and matched with the firing mechanism, when the safety assembly is located in the first position area, the firing mechanism is locked by the locking part, and when the safety assembly is located in the second position area, the firing mechanism is unlocked by the locking part.

As a further improved technical scheme of the invention, the firing mechanism comprises a nail pushing rod movably arranged in the shell and a firing handle pivotally connected to the shell, and the nail pushing rod can move along the axial direction of the anastomat body; the second position area is closer to the axis of the anastomat body than the first position area, when the safety component is located at the first position area, the triggering handle and the nail pushing rod cannot be linked, and when the safety component is located at the second position area, the triggering handle and the nail pushing rod can be linked.

As a further improved technical scheme, the nail pushing rod and the firing handle are axially and oppositely provided with a first joint part and a second joint part at intervals, and a guide channel is formed between the first joint part and the second joint part; when the safety component is located in the first position area, the safety component is not located in the guide channel, and when the safety component is located in the second position area, at least part of the structure of the safety component enters the guide channel to engage the nail pushing rod and the firing handle.

As a further improved technical solution of the present invention, the safety assembly has a base movably connected to the housing, and the slider is disposed on the base to guide the base to move along the lateral direction of the stapler body.

As a further improved technical solution of the present invention, the safety assembly further has a linkage piece matched with the base, and the linkage piece can move along the axial direction of the anastomat body; in the process that the anvil assembly moves towards the proximal direction, the anvil assembly acts on the transmission piece, the base is driven to move transversely through the transmission piece, and the base pushes the linkage piece, so that at least part of the structure of the linkage piece extends into the guide channel.

As a further improved technical solution of the present invention, the transmission member has a supporting portion disposed in cooperation with the anvil assembly, and a transmission rod extending from the supporting portion to a proximal end, and the base is in inclined cooperation with the transmission rod to drive the base to move toward the second position region.

As a further improved technical solution of the present invention, the safety mechanism further includes a reset mechanism, and the reset mechanism drives the safety assembly to move from the second position area to the first position area.

As a further improved technical scheme of the invention, the medical anastomat is a circumcision anastomat, and the far end of the anvil component is provided with a glans penis cavity for accommodating glans penis.

The invention has the beneficial effects that: according to the medical anastomat, the safety mechanism is arranged, so that the firing mechanism can be in a cockable state only when the anvil component is closed in place, and the medical anastomat can effectively prevent a doctor from firing the anastomosis nail and the cutter under the condition that the anvil component is not closed in place, so that poor formation of the anastomosis nail and even medical accidents are caused; meanwhile, a transverse guide structure for guiding the safety component to move along the transverse direction of the anastomat body is arranged, so that the movement stability of the safety component is enhanced.

Drawings

Fig. 1 is a schematic structural view of a medical stapler according to a first embodiment of the present invention.

Fig. 2 is a schematic view of another angle of the medical stapler shown in fig. 1.

Fig. 3 is a cross-sectional view a-a of the medical stapler of fig. 2 without the anvil assembly closed in place.

Fig. 4 is an enlarged view at B in fig. 3.

Fig. 5 is a schematic view of the safety mechanism of fig. 4.

Fig. 6 is a schematic structural view of the medical stapler shown in fig. 1 with a housing removed.

Fig. 7 is a schematic structural view of a staple pushing bar in the medical stapler shown in fig. 1.

Fig. 8 is a cross-sectional view a-a of the medical stapler of fig. 2 after the anvil assembly is closed in place and the handle is grasped.

Fig. 9 is a cross-sectional view a-a of the medical stapler of fig. 2 after the anvil assembly is closed into position.

Fig. 10 is a cross-sectional view a-a of the medical stapler of fig. 2 after the anvil assembly is closed in place and the handle is grasped.

Fig. 11 is a schematic structural view of a medical stapler according to a second embodiment of the present invention.

FIG. 12 is a cross-sectional view in the direction C-C of the medical stapler of FIG. 11 without the anvil assembly being closed in place.

Fig. 13 is an enlarged view at D in fig. 12.

Fig. 14 is a schematic view of the safety mechanism of fig. 11.

FIG. 15 is a cross-sectional view in the direction C-C of the medical stapler of FIG. 11 with the anvil assembly closed in place.

Detailed Description

The present invention will be described in detail with reference to the embodiments shown in the drawings, and reference is made to fig. 1 to 15, which are preferred embodiments of the present invention. It should be noted that these embodiments are not intended to limit the present invention, and those skilled in the art should be able to make functional, methodical, or structural equivalents or substitutions according to these embodiments without departing from the scope of the present invention.

The words expressing the position and the direction described in the invention all take an instrument operator as reference, one end close to the instrument operator is a near end, and the other end far away from the instrument operator is a far end; in the present invention, the axial direction means the longitudinal direction of the member, and the lateral direction means the direction perpendicular to the axial direction. Moreover, the terms first, second, etc. in the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to any number of technical features indicated.

Referring to fig. 1 to 10, a medical stapler 100 according to a first embodiment of the present invention is shown, wherein the medical stapler 100 is used for applying a plurality of staples to a physiological tissue of a human body and cutting the corresponding physiological tissue.

The medical stapler 100 of the present invention is a circular tube type stapler, and is specifically described by taking a circumcision stapler for performing a circumcision operation, which is used to apply a plurality of staples to a physiological tissue (here, foreskin) of a human body and simultaneously cut the corresponding physiological tissue. It should be noted that the technical spirit involved in the embodiments described below can be alternatively applied to other types of staplers, such as a circular tube-type stapler having a double handle.

The circumcision anastomat 100 comprises an anastomat body 1, an anvil component 2 which is axially movably connected to the anastomat body 1, and a safety mechanism 3 which is movably arranged in the anastomat body 1.

The stapler body 1 comprises a shell 11, a firing mechanism arranged on the shell 11 in a matching manner, a staple cartridge assembly 14 arranged at the far end of the shell 11, and a knob 15 arranged at the near end of the shell 11 to drive the anvil assembly 2 to move along the axial direction of the stapler body 1.

Preferably, the housing 11 is formed by splicing two sub-housings.

The firing mechanism comprises a nail pushing rod 12 movably arranged in the shell 11 and a firing handle 13 pivotally connected to the shell 11, wherein the nail pushing rod 12 can move along the axial direction of the anastomat body 1 to act on the nail bin assembly 14, so that the anastomosis nails and/or the cutting knife can be fired.

In the present embodiment, two of the firing handles 13 are symmetrically disposed on opposite sides of the housing 11, but not limited thereto, only one firing handle 13 may be disposed.

Referring to fig. 3, the nail magazine assembly 14 includes a nail barrel 141 disposed at a distal end of the housing 11, a nail pushing plate 142 disposed in the nail barrel 141, a cutter disposed on the nail pushing plate 142, and a nail magazine 143 disposed at a distal end of the nail barrel 141. The structures of the components in the staple cartridge assembly 14 and the matching relationship between the components are all existing in the field, and are not described herein again.

The proximal end of the nail pushing sheet 142 is connected with the distal end of the nail pushing rod 12, so that the nail pushing rod 12 can drive the nail pushing sheet 142 to move synchronously.

Further, the anvil assembly 2 includes an anvil 21 matched with the cartridge assembly 14, and an anvil shaft 22 connected to a proximal end of the anvil 21, the anvil shaft 22 is disposed through the stapler body 1, and a proximal end of the anvil shaft 22 is threadedly connected to the knob 15, and by rotating the knob 15, the anvil assembly 2 is driven to move axially along the stapler body 1, so that the anvil 21 moves towards or away from the cartridge assembly 14, and when the anvil assembly 2 is closed in place, the anvil 21 and the cartridge 143 clamp tissue, thereby facilitating subsequent anastomotic cutting and improving anastomosis effect.

In one embodiment, the anvil shaft 22 includes an anvil shaft body 221 and a lead screw 222, the anvil shaft body 221 is fixedly connected to the anvil 21, and the lead screw 222 connects the anvil shaft body 221 and the knob 15. Of course, the anvil shaft body 221 and the lead screw 222 may be integrally provided.

It will be appreciated that in embodiments where the medical stapler is a circumcision stapler, the distal end of the anvil assembly 2 is also provided with a glans cavity for receiving the glans.

The safety mechanism 3 is axially arranged between the anvil component 2 and the firing mechanism, and the safety mechanism 3 comprises a safety component 31 movably arranged in the shell 11 and a transmission piece 32 axially arranged between the anvil component 2 and the safety component 31.

The safety component 31 can move in a first position area and a second position area, when the safety component 31 is located in the first position area, the firing mechanism is in a non-firing state, and when the safety component 31 is located in the second position area, the firing mechanism is in a firing state.

In the process that the anvil assembly 2 moves in the proximal direction, the anvil assembly 2 acts on the transmission member 32, and the transmission member 32 drives the safety assembly 31 to move from the first position area to the second position area, so that when the anvil assembly 2 is closed to the proper position, the safety assembly 31 moves to the second position area, and the firing mechanism is in a cocked state, thereby facilitating subsequent anastomotic cutting. That is, only when the anvil component 2 is closed in place, the firing mechanism can perform the firing motion, so that the condition that a doctor holds the firing handle 13 under the condition that the anvil component 2 is not closed in place to fire the anastomotic nail and the cutter can be effectively prevented, the forming of the anastomotic nail is poor, and even medical accidents are caused.

The first position area and the second position area are arranged along the transverse direction of the stapler body 1, when the anvil component 2 moves towards the proximal end, the transmission component 32 is driven to move towards the proximal end along the axial direction, and the safety component 31 is driven to move towards the second position area from the first position area along the transverse direction through the transmission component 32.

Further, the safety mechanism 3 further includes a transverse guiding structure 4 for guiding the safety component 31 to move along the transverse direction of the stapler body 1, so as to enhance the stability of the movement of the safety component 31 and enhance the safety effect of the safety component 31.

It is understood that the transverse guiding structure 4 is disposed between the safety component 31 and the housing 11, and the transverse guiding structure 4 includes a first guiding member disposed on the housing and a second guiding member disposed on the safety component 31, and the first guiding member and the second guiding member cooperate to move the safety component 31 along the transverse direction of the stapler body 1.

In an embodiment, two lateral guiding structures 4 are disposed between the safety component 31 and the housing 11, and the stability of the safety component 31 in the lateral movement is further enhanced, but the safety component 31 is not limited thereto, and the lateral guiding structures 4 may be disposed on only one side of the safety component 31.

In an embodiment, the first guiding element and the second guiding element are a sliding slot 41 and a sliding block 42, which are engaged with each other, and the sliding slot 41 extends along a transverse direction of the stapler body 1 to slidably connect the safety component 31 to the housing 11 along the transverse direction. Of course, it is not limited thereto, and it should be understood that the transverse guiding structure 4 is only required to be configured to slidably connect the safety assembly 31 to the housing 11 along the transverse direction.

In the present embodiment, the slider 42 is provided on the safety assembly 31, and the slide groove 41 is provided on the housing 11, but the present invention is not limited thereto, and for example, the slider 42 may be provided to protrude from the housing 11, and in this case, the slide groove 41 may be provided on the safety assembly 31.

Furthermore, a mark part 34 is arranged on the safety mechanism 3, and an observation port 111 through which the mark part 34 is exposed to observe the position of the safety mechanism 3 is arranged on the housing 11, so that medical staff can intuitively distinguish the position of the safety mechanism 3 through the observation port 111, and thus judge whether the anvil assembly 2 is closed in place.

In the present embodiment, the marking portion 34 includes a first marking portion 341 and a second marking portion 342 different from the first marking portion 341, which are disposed at intervals, and when the safety mechanism 3 is located in the first position region, the first marking portion 341 is exposed from the observation port 111; when the safety mechanism 3 is located in the second position area, the second mark portion 342 is exposed from the viewing port 111, so that the medical staff can visually identify the position of the safety mechanism 3 through the viewing port 111, and thus judge whether the anvil assembly 2 is closed in place.

In one embodiment, the first mark portion 341 is red, and the second mark portion 342 is green; of course, the first marking portion 341 and the second marking portion 342 may be distinguished by other colors or other means, such as patterns.

In the present embodiment, the marking portion 34 is provided on the safety assembly 31, and in this case, the first marking portion 341 and the second marking portion 342 are provided on the safety assembly 31 at a distance in the lateral direction, and when the safety assembly 31 moves in the lateral direction, the first marking portion 341 or the second marking portion 342 can be exposed to the observation port 111. Of course, the present invention is not limited to this, and for example, the marking portion 34 may be provided on the transmission member 32, and in this case, the first marking portion 341 and the second marking portion 342 may be provided on the transmission member 32 at an interval in the axial direction, so that the first marking portion 341 or the second marking portion 342 can be exposed from the observation port 111 when the transmission member 32 moves in the axial direction.

Further, the safety component 31 has a base 311 movably connected to the housing 11, and the base 311 can move along the lateral direction of the stapler body 1. The base 311 cooperates with the transmission element 32, and when the anvil assembly 2 moves proximally, the anvil assembly 2 drives the transmission element 32 to move proximally, and the transmission element 32 drives the base 311 to move laterally from the first position region to the second position region.

In one embodiment, the mark portion 34 is disposed on the base 311, and the first mark portion 341 and the second mark portion 342 are disposed on the base 311 at a spacing along the transverse direction. Of course, the present invention is not limited thereto, and it is understood that the marking portion 34 may be provided so as to allow a medical staff to visually recognize the position of the safety mechanism 3 through the observation port 111.

In this embodiment, the transverse guiding structure 4 is disposed between the base 311 and the housing 11 to guide the transverse movement of the base 311 along the stapler body 1, so that the transmission member 32 can drive the safety component 31 to move between the first position area and the second position area along the transverse direction. Of course, it is not limited thereto, and it should be understood that the transverse guiding structure may be disposed at other positions of the safety component 31, as long as the safety component 31 can be guided to move between the first position area and the second position area along the transverse direction.

In a preferred embodiment, the slider 42 is disposed on the base 311, and the marking portion 34 is disposed on the slider 42, it can be understood that, in this case, the first marking portion 341 and the second marking portion 342 are disposed on the slider 42 at a spacing in the lateral direction, which simplifies the structure of the base 311.

In this embodiment, the firing handle 13 includes a rotating portion 131 pivotally connected to the housing 11, a second engaging portion 132 for driving the staple pushing bar 12, and an operating portion 133 for operating by the medical staff. When the anvil component 2 is closed in place, the firing handle 13 is held, and the second engaging portion 132 directly or indirectly abuts against and acts on the staple pushing rod 12 to drive the staple pushing rod 12 to move towards the distal direction, so as to achieve the firing of the circumcision anastomat 100. It will be appreciated that the linkage between the firing handle 13 and the staple pusher bar 12 is not so limited.

In this embodiment, the second engaging portion 132 indirectly abuts against and acts on the nail pushing rod 12, the nail pushing rod 12 is provided with a first engaging portion 121, and the first state of non-linkage and the second state of linkage are provided between the trigger handle 13 and the nail pushing rod 12. It can be understood that, in the embodiment in which the staple pushing bar 12 is indirectly pushed by the second engaging portion 132 to perform the firing motion, when the above-mentioned firing mechanism is in the unfirable state, that is, the first state in which the firing handle 13 and the staple pushing bar 12 are not linked, at this time, during the process of holding the firing handle 13 and rotating the firing handle 13, the second engaging portion 132 cannot directly or indirectly act on the staple pushing bar 12, so that the staple pushing bar 12 cannot perform the firing motion; correspondingly, when the above-mentioned trigger mechanism is in the cocked state, that is, the trigger handle 13 is in the second state in which the staple pushing rod 12 is linked, at this time, the trigger handle 13 is held, and in the process of rotating the trigger handle 13, the second engaging portion 132 indirectly acts on the staple pushing rod 12, so that the staple pushing rod 12 performs the trigger motion.

In addition, in this embodiment, the first engaging portion 121 is disposed at the proximal end of the nail pushing rod 12, but not limited thereto, the first engaging portion 121 may be disposed at any axial position of the nail pushing rod 12, as long as the trigger handle 3 is rotated when the trigger handle 13 and the nail pushing rod 12 are in the second state, and the first engaging portion 121 can drive the nail pushing rod 12 to move towards the distal end.

In one embodiment, a space is provided between the firing handle 13 and the staple pushing rod 12, that is, the firing handle 13 and the staple pushing rod 12 are axially spaced apart from each other along the stapler body 1, and it can be understood that the space is provided between the first engagement portion 121 and the second engagement portion 132.

Referring to fig. 8, when the anvil assembly 2 is not closed in place, the firing handle 13 is held, and when the firing handle 13 rotates, the second engaging portion 132 moves in the abdicating space and cannot directly or indirectly abut against and act on the staple pushing rod 12, so that the staple pushing rod 12 cannot perform a firing motion, and it can be understood that, at this time, the firing handle 13 and the staple pushing rod 12 are in the first state.

In the present embodiment, the safety unit 31 is an interlocking unit that can switch the firing handle 13 and the staple pushing lever 12 between the first state and the second state. It is understood that, in the embodiment of providing the abdicating space, when the safety component 31 is located at the first position region, the safety component 31 is far away from the abdicating space, so that the firing handle 13 is in the idle firing state, that is, when the firing handle 13 is rotated, the second engagement portion 132 of the firing handle 13 cannot directly or indirectly act on the staple pushing rod 12, so that the stapler cannot be fired, and at this time, the firing handle 13 and the staple pushing rod 12 are in the first state; when the safety component 31 is located the second position area, at least partial structure of the safety component 31 extends into the abdicating space, so that the firing handle 13 can indirectly act on the staple pushing rod 12 through at least partial structure of the safety component 31, at the moment, the firing handle 13 and the staple pushing rod 12 are in the second state, and the firing handle 13 can drive the staple pushing rod 12 to move towards the far end direction so as to fire the anastomat.

Further, the first position area and the second position area are arranged along the transverse direction of the stapler body 1, and in this embodiment, the second position area is defined to be closer to the axial center of the stapler body 1 relative to the first position area, that is, the second position area is closer to the staple pushing rod 12 relative to the first position area. Of course, this is not a limitation.

Specifically, the safety component 31 further has a linkage 312 matched with the base 311, in the process that the anvil component 2 moves towards the proximal direction, the anvil component 2 acts on the transmission component 32 to drive the base 311 moves along the transverse direction, the base 311 pushes the linkage 312, so that at least part of the structure of the linkage 312 extends into the abdicating space, so that the firing handle 13 and the staple pushing rod 12 are switched to the second state, that is, the firing handle 13 can indirectly drive the staple pushing rod 12 through the linkage 312 to perform firing movement, thereby facilitating subsequent firing.

In an embodiment shown in fig. 4 to 5, the link 312 is movably connected to the base 311, and the link 312 can move along the axial direction of the stapler body 1, when the safety component 31 is located at the second position region, at least a part of the structure of the link 312 is located in the space to be avoided, so as to engage with the first engaging portion 121 and the second engaging portion 132. The firing handle 13 is held, the firing handle 13 pushes the linkage piece 312 to move towards the far end direction, and the linkage piece 312 drives the staple pushing rod 12 to move towards the far end direction, so as to fire the staples and the cutter. Of course, the linkage 312 is not limited to this, and the linkage 312 may also be movably connected to the nail pushing rod 12, and it should be understood that the linkage 312 only needs to be configured to move between the first position area and the second position area along the transverse direction and move in the distal direction synchronously with the nail pushing rod 12.

Further, a guide channel 18 is formed between the first linking part 121 and the second linking part 132, the guide channel 18 is located in the abdicating space, when the safety component 31 moves between the first position area and the second position area, the guide channel 18 guides the transverse movement of the link 312 along the stapler body 1 and limits the position of the link 312, so that the link 312 is located between the first linking part 121 and the second linking part 132, and thus, when the safety component 31 is located at the second position area, the firing handle 13 can act on the staple pushing rod 12 through the link 312, that is, the firing handle 13 and the staple pushing rod 12 are in the second state; when the safety assembly 31 is located in the second position region, the guide channel 18 receives at least a portion of the linkage member 312, and during the rotation of the firing handle 13, the guide channel 18 can limit the linkage member 312 from shaking, so that the firing movement is more stable.

It will be appreciated that when the safety assembly 31 is in the first position region, the linkage member 312 is positioned outside the guide channel 18 such that the first engagement portion 121 is spaced apart from the second engagement portion 132 and the firing handle 13 is in the first state with the staple pusher bar 12.

In the embodiment shown in fig. 7, the first engaging portion 121 has extending walls 122 at the circumferentially opposite sides, the extending walls 122 axially protrude toward the second engaging portion 132, and the guide passage 18 is formed between the extending walls 122. Of course, this is not a limitation.

It can be understood that in the embodiment having two triggering handles 13, the circumcision stapler 100 has two safety mechanisms 3 respectively cooperating with the triggering handles 13, two safety mechanisms 3 are respectively disposed at two opposite sides of the staple pushing bar 12, and two safety mechanisms 3 are integrally disposed to enhance the effect of the safety mechanisms 3. Of course, the number of the safety mechanisms 3 is not limited to two, and may be set according to the specific situation; or two of the safety mechanisms 3 may be separately provided.

Referring to fig. 11-15, a second embodiment of the medical stapler of the present invention is shown, which differs from the first embodiment in that: the second engagement portion 132 directly abuts against the nail pushing rod 12, when the safety component 31 is located in the first position region, the anvil component 2 is not closed in place, at this time, the safety component 31 locks the firing mechanism, at this time, the firing mechanism is in a non-firing state; when the safety component 31 is located in the second position area, the safety component 31 unlocks the firing mechanism, and at this time, the firing mechanism is in a cocked state.

In the present embodiment, the first position region is defined to be closer to the axial center of the stapler body 1 than the second position region, that is, the first position region is defined to be closer to the staple pushing rod 12 than the second position region.

Further, the safety assembly 31 also has a locking portion 314 protruding from the base 311 toward the firing mechanism.

In the present embodiment, when the safety assembly 31 is located in the first position region, the locking portion 314 locks the nail pushing rod 12 to limit the distal movement of the nail pushing rod 12, and it can be understood that, even though the firing handle 13 is held, the firing handle 13 held on the nail pushing rod 12 cannot rotate because the locking portion 314 limits the distal movement of the nail pushing rod 12.

Of course, without limitation, when the safety assembly 31 is located in the first position region, the locking portion 314 may also be configured to lock the firing handle 13, so as to limit the rotation of the firing handle 13, thereby indirectly preventing the staple pushing bar 12 from being fired.

In this embodiment, the staple pushing rod 12 further has a supporting block 123 cooperating with the locking portion 314, and in the closing process of the anvil assembly 2, the safety assembly 31 is located at the first position region, and the locking portion 314 supports against the distal end of the supporting block 123, so as to lock the staple pushing rod 12 and prevent the firing motion of the staple pushing rod 12.

Of course, it is understood that the locking manner of the locking portion 314 locking the nail pushing rod 12 is not limited thereto, for example, the locking portion 314 may be configured as a groove, and when the safety component 31 is located in the first position region, at least a part of the structure of the abutting block 123 is received in the locking portion 314 (groove) to lock the nail pushing rod 12; or a limiting groove is directly formed in the nail pushing rod 12, and when the safety component 31 is located at the first position, at least part of the structure of the locking part 314 is limited in the limiting groove to lock the nail pushing rod 12.

In one embodiment, the abutting block 123 is disposed at a proximal end of the nail pushing rod 12 and extends along a transverse direction, and the locking portion 314 is formed by extending from the base 311 toward the proximal direction to cooperate with the abutting block 123. Of course, the abutting block 123 can be connected to any other position in the longitudinal direction of the nail pushing rod 12, as long as the anvil assembly 2 can cooperate with the locking portion 314 to lock the nail pushing rod 12 when not closed in place.

When the safety component 31 is located in the second position area, the firing mechanism is unlocked, and the staple pushing rod 12 can be fired to perform firing of staples and/or a cutter. It is understood that when the safety assembly 31 is located at the second position region, the locking portion 314 is not located on the moving path of the staple pushing bar 12 and is not located on the rotating path of the firing handle 13, so that the firing handle 13 can be rotated to drive the staple pushing bar 12 to perform the firing motion, thereby completing the firing of the medical stapler 100.

The second embodiment of the present invention is the same as the first embodiment except for the above differences, and thus, the description thereof is omitted.

The medical stapler according to the present invention will be described in detail below by taking the medical stapler according to the first embodiment as an example.

Further, the transmission member 32 is movably disposed in the stapler body 1, when the anvil assembly 2 moves towards the proximal end, the anvil assembly 2 acts on the transmission member 32 to drive the transmission member 32 to move towards the proximal end, the transmission member 32 drives the safety assembly 31 to move from the first position area to the second position area, the axial movement of the transmission member 32 is converted into the transverse movement of the safety assembly 31, and when the anvil assembly 2 is closed to the proper position, at least a part of the structure of the linkage member 312 extends into the guide channel 18 to realize the linkage between the firing handle 13 and the staple pushing rod 12, so that only when the anvil assembly 2 is closed to the proper position, the firing handle 13 and the staple pushing rod 12 are in the second state, that is, the firing handle 13 and the staple pushing rod 12 can be linked, and at this time, the circumcision anastomat 100 is in a cockable state, so that a doctor can be effectively prevented from holding the cocking handle 13 under the condition that the anvil component 2 is not closed in place to perform the cocking of anastomosis nails and a cutter, the poor formation of the anastomosis nails is caused, and even medical accidents are caused.

The above-mentioned cocked state is the state that the anvil assembly 2 is closed in place, so that the staple cartridge assembly 14 and the anvil 21 clamp the foreskin to be cut in place, and the firing handle 13 and the staple pushing bar 12 are in the second state of linkage.

Specifically, the transmission member 32 is located between the anvil assembly 2 and the base 311, and when the anvil assembly 2 moves in the proximal direction, the anvil assembly 2 acts on the transmission member 32, and the base 311 is driven by the transmission member 32 to move in the transverse direction to the second position area, so as to drive the linkage member 312 to extend into the guide channel 18.

Further, the anvil assembly 2 further includes a protrusion 23 disposed on the outer periphery of the anvil shaft 22, the transmission member 32 is disposed at a proximal end of the protrusion 32, and when the anvil assembly 2 moves proximally, the protrusion 23 abuts against the transmission member 32 to drive the transmission member 32 to move proximally.

In one embodiment, the transmission member 32 is sleeved on the anvil shaft 22, and the protrusion 23 is annular to act on the transmission member 32. However, the present invention is not limited to this, and the projection 23 may not be provided in a ring shape, and it is understood that the projection 23 may be provided so as to be capable of acting against the transmission member 32.

In the embodiment where the anvil 22 has the anvil body 221 and the lead screw 222 arranged in segments, the projection 23 may be provided on the outer periphery of the anvil body 221 or the outer periphery of the lead screw 222.

It will be appreciated that the outer diameter of the anvil shaft body 221 is generally larger than the outer diameter of the lead screw 222, so that, in the embodiment where the protrusion 23 is disposed on the outer periphery of the anvil shaft body 221, the protrusion 23 may be a part of the anvil shaft body 221, for example, the protrusion 23 is the proximal end of the anvil shaft body 221, and during the proximal movement of the anvil assembly 2, the proximal end of the anvil shaft body 221 abuts against the transmission member 32, pushing the transmission member 32 to move in the proximal direction synchronously with the anvil assembly 2, so as to drive the safety assembly 31 to move from the first position region to the second position region. Of course, the present invention is not limited thereto, and the protrusion 23 may be disposed at other axial positions of the anvil shaft body 221, as long as the protrusion 23 can drive the transmission member 32 to move in the proximal direction simultaneously when the anvil assembly 2 moves in the proximal direction.

Specifically, the transmission member 32 includes a supporting portion 321 sleeved on the anvil shaft 22, and a transmission rod 322 extending from the supporting portion 321 to the proximal end, the supporting portion 321 is supported and matched with the protrusion 23, when the anvil assembly 2 moves to the proximal end, the protrusion 23 is supported and acted on the supporting portion 321, so as to drive the transmission rod 322 to move to the proximal end, and the safety assembly 31 is driven to move from the first position area to the second position area.

Further, a guide groove 144 is axially arranged on the magazine assembly 14 in a penetrating manner, and the transmission rod 322 enters the housing 11 from the inner side of the magazine assembly 14 through the guide groove 144 and is matched with the base 311, that is, the proximal end of the transmission rod 322 abuts against and is matched with the base 311.

In the present invention, the inner side of the staple cartridge assembly 14 refers to a side of the staple cartridge assembly 14 close to the axial center of the staple cartridge assembly 14, and more specifically, refers to a side of the staple pushing plate 142 close to the axial center thereof. It is understood that the guide slot 144 extends through both the staple cartridge 141 and the staple pusher 142, so that the transmission rod 322 can pass through the guide slot 144 and out of the inside of the cartridge module 14 into the housing 11.

During the axial movement of the transmission member 32 along the medical stapler 100, the transmission rod 322 moves along the guide groove 144, and guides and limits the movement of the transmission member 32.

Further, an axial guiding structure is further disposed between the transmission member 32 and the stapler body 1 to guide the transmission member 32 to move along the stapler body in the axial direction.

In this embodiment, the axial guiding structure is a through groove 3221 and a guiding block 1411, which are matched with each other, and when the transmission member 32 moves along the axial direction, the through groove 3221 moves along the guiding block 1411 to guide and limit the movement of the transmission member 32.

In one embodiment, the through groove 3221 is disposed on the transmission rod 322 and extends along the axial direction, and the guiding block 1411 is disposed on the nail barrel 141 and located in the guiding groove 144, that is, the guiding block 1411 separates the guiding groove 144 into two independent guiding grooves for the transmission rod 322 to pass through. Of course, the invention is not limited thereto, and it should be understood that the guiding block 1411 may be disposed on the housing 11 as long as it can be guided and matched with the through groove 3221.

Further, the abutting portion 321 is detachably connected to the transmission rod 322, so as to assemble the transmission member 32 into the stapler body 1. Of course, the driving rod 322 is not limited to this, and may be fixedly connected to the abutting portion 321.

In the embodiment that the circumcision anastomat 100 has two safety mechanisms 3, the two transmission members 32 share one abutting portion 321, the abutting portion 321 is sleeved on the anvil shaft 22, and the two transmission rods 322 are connected to two opposite ends of the abutting portion 321, when the anvil assembly 2 moves towards the proximal direction, the anvil assembly 2 acts on the abutting portion 321 to drive the two transmission rods 322 to move towards the proximal direction synchronously, and the corresponding safety assembly 31 is driven to move towards the second position area synchronously. Of course, the present invention is not limited thereto, as long as the driving of the anvil assembly 2 can drive the two transmission members 32 to move synchronously in the proximal direction.

Furthermore, a first guiding structure 313 is disposed on the safety component 31, a second guiding structure 323 corresponding to the first guiding structure 313 is disposed on the transmission member 32, and when the transmission member 32 moves proximally, the first guiding structure 313 and the second guiding structure 323 cooperate to move the safety component 31 laterally to the second position area. Of course, the present invention is not limited to this, and a guide structure may be provided only on the safety component 31 or the transmission member 32, as long as the relative movement between the transmission member 32 and the safety component 31 can be guided.

It will be appreciated that as the safety assembly 31 is moved laterally toward the first position area, the first guide structure 313 cooperates with the second guide structure 323 to drive the transmission member 32 axially and distally.

It is understood that in this embodiment, the first guiding structure 313 is disposed at the distal end of the base 311, and the second guiding structure is disposed at the proximal end of the transmission rod 322. Of course, this is not a limitation.

Referring to the embodiment shown in fig. 5, the first guiding structure 313 is a first guiding inclined surface, and the second guiding structure 323 is a second guiding inclined surface, that is, the base 311 and the transmission rod 322 are matched by using the guiding inclined surfaces, so that the structure is simple and the matching is stable. Of course, this is not a limitation.

Specifically, the distances from the first guiding inclined surface to the axis of the shaft and the distances from the second guiding inclined surface to the axis of the shaft are gradually decreased from the proximal end to the distal end, and when the transmission member 32 moves towards the proximal end, the safety component 31 can be driven to move from the first position area to the second position area closer to the axis of the shaft.

It will be appreciated that in the second embodiment, the first guiding slope and the second guiding slope are gradually increased from the proximal end to the distal end, so that when the transmission member 32 moves proximally, the safety component 31 can be driven to move from the first position area to the second position area farther from the axial center.

Further, the staple cartridge assembly 14 further comprises a limiting cylinder 145 arranged in the staple cylinder 141, and when the anvil assembly 2 moves along the axial direction of the stapler body 1, the anvil assembly 2 moves along the limiting cylinder 145, so that the movement of the anvil assembly 2 can be guided, and the anvil assembly 2 is prevented from shaking in the moving process.

In the embodiment where the anvil shaft 22 has the anvil shaft body 221 and the lead screw 222 arranged in segments, the transmission member 32 is located at the proximal end of the limiting cylinder 145, and during the process of moving the anvil assembly 2 in the proximal direction, the proximal end of the anvil shaft body 221 passes through the proximal end of the limiting cylinder 145 and acts on the transmission member 32 to push the transmission member 32 and the anvil assembly 2 to move in the proximal direction synchronously, so as to drive the safety assembly 31 to move from the first position area to the second position area.

Further, the anvil shaft body 221 is provided with a first matching portion 223, the limiting cylinder 145 is provided with a second matching portion 1451, and when the anvil assembly 2 is closed in place, the first matching portion 223 matches with the second matching portion 1451 to limit the anvil assembly 2 to continue moving in the proximal direction, so as to prevent over-tight closing and excessive pressing of foreskin tissue.

In this embodiment, the first matching portion 223 is a step portion disposed at the distal end of the anvil shaft body 221, and the second matching portion 1451 is a distal end surface of the limiting cylinder 145, when the anvil assembly 2 is closed in place, a proximal end surface of the step portion abuts against the distal end surface of the limiting cylinder 145 to limit the anvil assembly 2 to continue moving in the proximal direction, so as to prevent over-tight closing and excessive pressing of the foreskin tissue.

Of course, the present invention is not limited to this, for example, the second matching part 1451 may also be disposed at the proximal end of the limiting cylinder 145 and formed to protrude toward the center line of the limiting cylinder 145; it will be appreciated that the first mating portion 223 and the second mating portion 1451 are configured to limit the anvil assembly 2 from continuing to move in the proximal direction when the anvil assembly 2 is closed in place.

Further, the safety mechanism 3 further includes a reset mechanism 33, and in the process that the anvil assembly 2 moves in the distal direction, the reset mechanism 33 drives the safety assembly 31 to move from the second position region to the first position region, so that the firing handle 13 and the staple pushing bar 12 are switched to the first state, and the accidental firing is prevented.

In the embodiment that the linkage member 312 is movably connected to the base 311, the reset mechanism 33 is located between the housing and the base 311, so as to drive the base 311 to move along the transverse direction to the first position region, and drive the linkage member 312 to move synchronously in the direction away from the guide channel 18. However, it should be understood that, when the linkage 312 is connected to the staple pushing bar 12, the reset mechanism 33 may be disposed between the linkage 312 and the staple pushing bar 12, so that when the base 311 removes the force applied to the linkage 312, the reset mechanism 33 can drive the linkage 312 away from the guide channel 18 to switch the firing handle 13 and the staple pushing bar 12 to the first state, thereby preventing from being fired by mistake.

In the present embodiment, the reset mechanism 33 is an elastic member, preferably a tension spring, connecting the base 311 and the housing 11, but not limited thereto, and the reset mechanism 33 may be an elastic block or the like as long as it can drive the safety member 31 to move from the second position region to the first position region.

During the movement of the safety member 31 from the first position area to the second position area, the tension spring is gradually stretched, so that, when the anvil member 2 moves in the distal direction, the transmission member 32 releases the pressure applied to the safety member 31, and the safety member 31 moves from the second position area to the first position area under the driving of the biasing force of the tension spring, and at the same time, the safety member 31 drives the transmission member 32 to move in the distal direction.

Further, the safety mechanism 3 further includes a limiting structure 35 disposed in the stapler body 1, when the safety component 31 is located in the first position region, the limiting structure 35 is configured to limit the distal movement of the transmission member 32, so as to enhance the stability of the transmission member 32, and enable the transmission member 32 to act on the safety component 31 when moving proximally.

Specifically, the limiting structure 35 includes a first abutting surface disposed at the far end of the housing 11, and when the safety component 31 is located in the first position area, the transmission rod 322 abuts against the first abutting surface to limit the transmission member 32 from moving towards the far end.

In a specific embodiment, the transmission rod 322 is provided with a second abutting surface 3222 parallel to and opposite to the first abutting surface, when the safety component 31 is located in the first position region, the second abutting surface 3222 abuts against and fits the first abutting surface, so as to limit the distal movement of the transmission member 32, and meanwhile, enhance the stability of the transmission member 32.

Further, the limiting mechanism 35 further includes an accommodating portion 351 disposed at the proximal end of the nail barrel 145, when the safety component 31 is located in the first position region, at least a part of the structure of the abutting portion 321 is accommodated in the accommodating portion 351, and the abutting portion 321 abuts against the proximal end of the nail barrel 145, so as to limit the distal movement of the transmission member 32 and also limit the rotation of the transmission member 32.

Further, a first return spring 16 is sleeved on the nail pushing rod 12, and when the firing handle 13 and the nail pushing rod 12 are in a second state, the firing handle 13 is held to drive the nail pushing rod 12 to move towards the far end direction, the first return spring 16 is gradually compressed. When the holding force applied to the firing handle 13 is removed, the staple pusher bar 12 is proximally returned to the initial position under the bias of the first return spring 16.

Specifically, a convex portion may be disposed on the nail pushing rod 12, the proximal end of the first return spring 16 abuts against the convex portion, and the distal end of the first return spring 16 abuts against the nail barrel of the nail cartridge assembly 14, but not limited thereto, the distal end of the first return spring 16 may also abut against the housing 11, as long as the distal end of the first return spring 16 can be limited.

Preferably, the projection is a part of the first engagement portion 121 to simplify the structure of the nail pushing bar 12, and in this case, in an embodiment in which the first engagement portion 121 (projection) is provided at the proximal end of the nail pushing bar 12, the nail pushing bar 12 is T-shaped. Of course, this is not a limitation.

Further, a second elastic return element 17 is disposed between the firing handle 13 and the housing 11, and when the firing handle 13 is held and the firing handle 13 is rotated, the second elastic return element 17 is gradually compressed, and when the holding force applied to the firing handle 13 is cancelled, the firing handle 13 is returned to the initial position by the biasing force of the second elastic return element 17.

In an embodiment, the second elastic return element 17 is a spring, but the second elastic return element 17 may also be an elastic block.

Compared with the prior art, the medical anastomat 100 has the advantages that through the arrangement of the safety mechanism 3, only when the anvil component 2 is closed in place, the safety mechanism 3 enables the triggering handle 13 and the nail pushing rod 12 to be in the second linkage state, so that a doctor can be effectively prevented from triggering the anastomosis nails and the cutter under the condition that the anvil component 2 is not closed in place, the poor formation of the anastomosis nails can be caused, and even medical accidents can be caused; meanwhile, a transverse guiding structure 4 for guiding the safety component 31 to move along the transverse direction of the anastomat body 1 is arranged, so that the movement stability of the safety component 31 is enhanced.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims (15)

1. A medical stapler, comprising:

the anastomat body comprises a shell and a firing mechanism which is arranged on the shell in a matching way;

an anvil assembly movable in an axial direction of the stapler body;

it is characterized in that the medical anastomat further comprises: the movable safety mechanism that locates anvil subassembly with between the firing mechanism, safety mechanism makes the firing mechanism switch between can not the firing state and the firing state, just safety mechanism has:

the safety component is movably arranged in the shell and is provided with a first position area which enables the trigger mechanism to be in a non-trigger state and a second position area which enables the trigger mechanism to be in a trigger state;

the transmission piece is arranged between the anvil component and the safety component, and the anvil component acts on the transmission piece in the process of moving the anvil component towards the near end direction, and drives the safety component to move from the first position area to the second position area by driving the transmission piece to move;

the transverse guide structure is used for guiding the safety component to move between the first position area and the second position area along the transverse direction of the anastomat body.

2. The medical stapler of claim 1, wherein: the transverse guiding structure comprises a first guiding piece arranged on the shell and a second guiding piece arranged on the safety component, and the first guiding piece is matched with the second guiding piece, so that the safety component moves transversely along the anastomat body.

3. The medical stapler of claim 2, wherein: the first guide part and the second guide part are a sliding groove and a sliding block which are matched with each other, the sliding groove extends along the transverse direction of the anastomat body, and the sliding block is arranged on the safety component.

4. The medical stapler of claim 3, wherein: the safety mechanism is provided with a marking part, and the shell is provided with an observation port for exposing the marking part to observe the position of the safety mechanism.

5. The medical stapler of claim 4, wherein: the marking part comprises first marking parts arranged at intervals and second marking parts different from the first marking parts, and when the safety mechanism is positioned in a first position area, the first marking parts are exposed from the observation port; when the safety mechanism is located in the second position area, the second mark part is exposed from the observation port.

6. The medical stapler of claim 5, wherein: the first marking part is red, and the second marking part is green.

7. The medical stapler of any one of claims 3-6, wherein: the marking part is arranged on the sliding block.

8. The medical stapler of claim 1, wherein: the first location area is closer to an axis of the stapler body than the second location area; the safety assembly is provided with a base and a locking part connected to the base and matched with the firing mechanism, when the safety assembly is located in the first position area, the firing mechanism is locked by the locking part, and when the safety assembly is located in the second position area, the firing mechanism is unlocked by the locking part.

9. The medical stapler of claim 1, wherein: the firing mechanism comprises a nail pushing rod movably arranged in the shell and a firing handle pivotally connected to the shell, and the nail pushing rod can move along the axial direction of the anastomat body; the second position area is closer to the axis of the anastomat body than the first position area, when the safety component is located at the first position area, the triggering handle and the nail pushing rod cannot be linked, and when the safety component is located at the second position area, the triggering handle and the nail pushing rod can be linked.

10. The medical stapler of claim 9, wherein: the nail pushing rod and the firing handle are axially spaced and oppositely provided with a first connecting part and a second connecting part, and a guide channel is formed between the first connecting part and the second connecting part; when the safety component is located in the first position area, the safety component is not located in the guide channel, and when the safety component is located in the second position area, at least part of the structure of the safety component enters the guide channel to engage the nail pushing rod and the firing handle.

11. The medical stapler of claim 10, wherein: the safety assembly is provided with a base movably connected to the shell, and the sliding block is arranged on the base to guide the base to move along the transverse direction of the anastomat body.

12. The medical stapler of claim 11, wherein: the safety assembly is also provided with a linkage piece matched with the base, and the linkage piece can move along the axial direction of the anastomat body; in the process that the anvil assembly moves towards the proximal direction, the anvil assembly acts on the transmission piece, the base is driven to move transversely through the transmission piece, and the base pushes the linkage piece, so that at least part of the structure of the linkage piece extends into the guide channel.

13. The medical stapler of claim 11, wherein: the transmission part is provided with a butting part matched with the anvil component and a transmission rod extending from the butting part to the near end, and the base is matched with the transmission rod inclined plane so as to drive the base to move to the second position area.

14. The medical stapler of claim 1, wherein: the safety mechanism further comprises a reset mechanism which drives the safety component to move from the second position area to the first position area.

15. The medical stapler of claim 1, wherein: the medical anastomat is a circumcision anastomat, and the far end of the anvil component is provided with a glans penis cavity for accommodating glans penis.

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