CN211270957U - Medical hemostatic clamp - Google Patents

Abstract

A medical hemostatic clamp at least comprises the following structures: a clip assembly; the control wire is used for connecting the clamp assemblies in series along the axial direction and controlling the opening or closing of the most distal clamp by moving the control wire; the handle is used for controlling the control line to move back and forth; a sheath tube; the sheath far end is provided with a limiting assembly, the proximal end side of the limiting assembly is provided with a limiting space facing the axial direction of the sheath, and at least one part of the most far end clamp is limited in the limiting space by the limiting assembly in a releasable manner. The medical hemostatic clamp has the technical effects of repeated opening and closing, rotation and the like.

Description

Medical hemostatic clamp

Technical Field

The utility model relates to a medical hemostatic clamp, which belongs to a medical device used in human body.

Background

Over 50 years, endoscopes have gone through stages from disease diagnosis to disease treatment, and treatment of specific diseases is very effective and reliable, and is widely used. The stomach and intestinal tract of an organism often cause bleeding or mucosal injury and even perforation due to various diseases, accidental injury or injury in endoscopic surgery. The active hemorrhage is generally treated by medicine spraying, high-frequency electrotome burning, mechanical compression hemostasis by hemostatic clips and other methods. The mechanical compression hemostasis of the hemostatic clamp is relatively reliable in treatment effect of active hemorrhage caused by non-varicose veins, general acceptance of doctors and patients is achieved, and along with the development of a hemostasis technology under an endoscope, the application of the hemostatic clamp under the endoscope to active hemorrhage treatment becomes the first choice.

Present clinical operation hemostatic clamp commonly used is mostly single hairpin, only have a clip in one set of hemostatic clamp subassembly, also can release once, the clip need be taken out from the scope by hemostatic clamp after being released, if the surface of a wound is big or bleed a lot of, when needing to use a plurality of clip closed tissue, just need change hemostatic clamp subassembly repeatedly, fix a position repeatedly, the work load of not only very big increase doctor's operation, increase treatment cost, and repeated insertion, it can spend a large amount of times to take out hemostatic clamp subassembly, can appear leading to the possibility that patient's alimentary tract bleeds in a large number even. Thus, hair ties are gaining acceptance today based on the advantage that they can be inserted once and released multiple times.

Meanwhile, in the clinical application of the hemostatic clamp for treatment, a doctor needs to precisely adjust the angle of the hemostatic clamp according to the position, the form, the state and the like of lesion tissues, and flexibly and quickly adjust the angle of the clamp so as to clamp and close the lesion better. The rotation angle of the hemostatic clamp can be quickly, accurately and flexibly adjusted, which is very important for closing the digestive tract focus and is urgently needed by doctors in actual operations. Similarly, due to the normal peristalsis of the body lumen, when the clamp is closed to a half, the tissue to be clamped is easy to slip off from the clamp, and at the moment, the clamp needs to be opened again for secondary clamping, so that the clamp is required to have the performance of repeated opening and closing. Furthermore, the ability to effectively release the distal clip through the control cord without affecting the other clip configurations and performance is also an important direction in which the hair clip needs to be improved.

Prior art WO2006098994a1 discloses a hair clip, which has the disadvantages that a plurality of clips are connected end to end in sequence, a control wire is only connected with the nearest clip, when tension is applied to the farthest clip to release the far clip, force needs to be transmitted through each clip thereafter, in order to effectively transmit force to the far clip and ensure that the far clip is not disconnected, the connection strength between the back clips needs to be gradually increased, if the farthest clip is not successfully released, the clip at the back end is most likely to fail due to the overlarge tension, the whole set of hemostatic clip assembly needs to be replaced at the moment, and the situation not only can cause delay of operation time but also increase of patient cost. In addition, the rear end clip is subjected to a certain force when the most distal clip is released, so that the performance of the clip is damaged, which may lead to inconsistent stability and reliability of each clip and affect the treatment effect.

The prior art CN107280723A discloses a hair clip, which has the disadvantages that the design structure of the hemostatic clip can not realize repeated opening and closing of the clip and also can not realize flexible rotation of the clip, in the actual treatment process, a doctor can hardly adjust the angle between the clip and a focus, only a far-end clip can be released after a tissue is separated, the tissue is clamped again by adopting the later clip, the same clip is difficult to be used for repeated positioning, and the operation cost and the operation difficulty are increased.

The prior art CN107106181A discloses a hair clip, which has the disadvantages that the structure of the hair clip also cannot realize repeated opening of the clip, when the clip slips from the tissue to be clipped, the distal clip cannot be unfolded again and can only be released, and the clip is reloaded at the back, thereby increasing the operation cost.

It can be seen that there is certain design defect in the existing running fire clip structure, which results in that the clip can not be opened and closed repeatedly, or the angle can not be adjusted flexibly, or in the clip releasing process, the clip to be released later can be affected by the release of the remote clip, which results in the performance reduction of the clip.

In view of this, the present invention is especially provided.

SUMMERY OF THE UTILITY MODEL

Based on technical problem such as the switching can not be repeated, angular adjustment is inflexible that prior art exists, the utility model provides a medical hemostatic clamp that can repeated switching, accurate angle of adjustment of can nimble rotation includes following structure at least:

a clip assembly comprising at least one axially aligned clip;

the control wire is used for connecting the clamp assemblies in series along the axial direction and controlling the opening or closing of the most distal clamp by moving the control wire, the clamp comprises a clamp body and a clamp seat, and the distal end of the control wire is in releasable connection with the clamp body of the most distal clamp;

the handle is positioned at the proximal end of the control wire and is used for controlling the control wire to move back and forth;

a sheath, the control wire extending along the sheath lumen, the clip assembly located on a distal side of the sheath lumen;

the sheath far end is provided with a limiting assembly, the proximal end side of the limiting assembly is provided with a limiting space facing the axial direction of the sheath, and at least one part of the most far end clamp is limited in the limiting space by the limiting assembly in a releasable manner.

Preferably, the distal end of the stop assembly has a circumferentially disposed stop boss defining the stop space on a proximal side thereof, and the cartridge peripheral wall of the distal-most clip is provided with a biasing mechanism releasably retained within the stop space on the proximal side of the stop boss.

Preferably, the limiting boss extends towards the axial direction of the sheath, and when the radial expansion force applied to the protruding surface of the limiting boss is larger than a threshold value, the limiting boss radially expands and releases the distal-most clip.

Preferably, the sheath tube comprises an inner sheath tube and an outer sheath tube sleeved outside the inner sheath tube, the limiting component is located at the far end of the outer sheath tube, and the limiting space for limiting the farthest end clamp is formed between the near end side of the limiting boss and the far end of the inner sheath tube.

Preferably, the control wire comprises a first control wire at the far end side and a second control wire at the near end side, and the near end of the first control wire is movably connected with the far end of the second control wire; wherein the first control wire proximal end has a rotational control assembly that controls rotation of the first control wire relative to the second control wire.

The utility model also provides a medical hemostatic clamp that can repeatedly open and close, can rotate accurate angle of adjustment in a flexible way, include at least following structure:

a clip assembly comprising at least one axially aligned clip;

the control wire is used for connecting the clamp assemblies in series along the axial direction, the opening or closing of the most distal clamp is controlled by moving the control wire, the clamp comprises a clamp body and a clamp seat, and the distal end of the control wire is in releasable connection with the clamp body of the most distal clamp;

the handle is positioned at the proximal end of the control wire and is used for controlling the control wire to move back and forth;

a sheath, the control wire extending along the sheath lumen, the clip assembly located on a distal side of the sheath lumen;

the control wire comprises a first control wire at the far end side and a second control wire at the near end side, and the near end of the first control wire is movably connected with the far end of the second control wire; wherein, the proximal end of the first control wire is provided with a rotary control component for controlling the first control wire to rotate relative to the second control wire.

Preferably, the rotary control assembly comprises a terminal knob located at the proximal free end of the first control wire, and a first stopper and a second stopper located at the proximal side of the first control wire and spaced apart from each other, wherein the first stopper and the second stopper are used for limiting the displacement of the second control wire in the axial direction relative to the first control wire.

Preferably, the sheath tube comprises an inner sheath tube and an outer sheath tube sleeved outside the inner sheath tube, the limiting component is located at the far end of the outer sheath tube, and a limiting space for limiting the farthest clip is formed between the near end side of the limiting component and the far end of the inner sheath tube. Preferably, the inner sheath comprises a first inner sheath located at the distal end and used for accommodating a plurality of the clips and a second inner sheath located at the proximal end and used for accommodating the control wire, the tail ends of the first inner sheath and the second inner sheath are fixedly connected, and the clips are limited in the first inner sheath in the initial state.

Preferably, the rotation control assembly is located at the proximal end of the inner sheath tube, and the rotation control assembly is connected with the inner sheath tube in a manner of any one of the following (1) or (2):

(1) the inner sheath tube is provided with a knob sliding groove, and when the control line slides forwards and backwards, the rotary control assembly is positioned in the knob sliding groove and moves in an axial limiting manner;

(2) the inner sheath tube is provided with an extending hole of the rotary control assembly, and the proximal free end of the first control wire movably extends out of the extending hole.

Preferably, the outer sheath tube and the inner sheath tube are capable of moving relatively, and the proximal end of the outer sheath tube is movably connected to the outer wall of the proximal end portion of the inner sheath tube through a movable limiting piece.

Preferably, the movable limiting part is structured as any one of the following (1) or (2):

(1) the near end of the movable limiting piece is fixedly connected with the outer wall of the inner sheath tube, the far end of the movable limiting piece is provided with a limiting track, and the near end of the outer sheath tube axially limits and moves along the limiting track;

(2) the outer sheath tube near-end has the setting element that is equipped with slide channel, the fixed connection portion of activity locating part near-end and inner sheath tube outer wall fixed connection, be equipped with on the fixed connection portion and extend to the distal end through slide channel's location slide bar just location slide bar distal end is spacing in the setting element.

Preferably, each of the clips has a release passage at the proximal end of the clip body, and the distal end of the control wire has a release member releasably coupled to the release passage, the release member being adapted to be withdrawn from the release passage when the control wire is subjected to a pulling force greater than a threshold value.

Through the technical scheme, the utility model discloses following technological effect has:

at first, prior art relatively, the utility model discloses a device passes through the structural design of spacing subassembly, the utility model discloses a repeated switching of clip, the clip can relapse the switching more than the quintic at least, and the centre gripping repeatedly positioning is in advance again convenient many times to do benefit to and place the hemostasis centre gripping in the most appropriate position, reach best hemostasis effect, avoided because improper centre gripping and reload new clip. In clinical use, a doctor can insert the hemostatic clip device once, and can release a plurality of hemostatic clips to fully hemostatic clip the focus, so that the release process of each clip is stable and reliable, and the ineffective release process caused by unsuccessful clip clipping can be avoided.

Secondly, the utility model discloses a running fire clip simple structure is reasonable, and easy operation is convenient, and the release is reliable and stable, through the design of rotation control subassembly, can realize nimble rotation angle of adjustment in the use, makes the angle of adjustment clip and focus that the doctor can be accurate rapidly, and better carries out the clamp to the focus and closes.

Furthermore, the utility model discloses with the clip setting in conveyor, shortened the length of clip like this greatly, make it simpler, more reliable, the structure is shorter and shorter, more is fit for through crooked endoscope pincers way, provides the device that can extensively be applicable to each position of alimentary canal for clinician.

Drawings

FIG. 1 is an overall view of a blood-clamping stopping device according to embodiment 1 of the present invention;

figure 2 is a distal end side view of a blood-termination device according to example 1 of the present invention;

figure 3 is an assembly view of the distal clip of the blood-termination device of example 1 of the present invention;

fig. 4 is a view showing the distal end clip of the blood-clamping device according to example 1 of the present invention in an expanded state;

fig. 5 is an isolated view of embodiment 1 of the present invention showing the distal end of the clip deployed;

fig. 6 is an exploded view of the distal end clip of the blood-clamping device of example 1 of the present invention in an expanded state;

fig. 7 is a separate view showing a closed state of the distal end clip according to embodiment 1 of the present invention;

figure 8 is a view of the embodiment 1 of the present invention showing the end of the clip device unloaded with clips;

FIG. 9 is a view of the junction between the outer sheath and the inner sheath of the blood-stop clip device according to embodiment 1 of the present invention;

FIG. 10 is an axial sectional view and a perspective view of a stop block of a blood clamping device according to embodiment 1 of the present invention;

fig. 11 is a schematic view showing a releasing process of the distal-most clip according to embodiment 1 of the present invention;

FIG. 12 is a view of the junction between the outer sheath and the inner sheath of the device for stopping the blood clamp according to embodiment 2 of the present invention;

fig. 13 is a schematic view showing the release process of the distal-most clip according to embodiment 3 of the present invention;

fig. 14 is an axial sectional view and a perspective view of a limiting assembly in embodiment 4 of the present invention;

figure 15 is an axial sectional view of a limiting component in embodiment 5 of the invention;

figure 16 is an axial sectional view of a limiting component in embodiment 6 of the invention;

fig. 17 is an axial sectional view of a limiting assembly in embodiment 7 of the present invention.

Description of reference numerals:

1-a clip, 11-a distal-most clip, 12-an unloaded clip, 13-a clip arm, 14-a clip holder, 15-a biasing mechanism, 16-a clip, 17-a clip runner, 18-a locking groove, 19-a release channel, 2-a control line, 21-a first control line, 22-a second control line, 23-a release assembly, 3-a handle, 31-a slider, 4-a sheath, 41-an outer sheath, 42-a first inner sheath, 43-a second inner sheath, 44-a positioning element, 45-a sliding channel, 5-a limiting assembly, 51-a limiting boss, 52-a notch, 53-a limiting part, 6-a rotation control assembly, 61-an end knob, 62-a first limiting block, 63-a second limiting block, 7-movable limiting piece, 71-fixed connecting part, 72-positioning slide rod

Detailed Description

The technical contents of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Embodiments of the present invention will be described in detail below with reference to examples, but those skilled in the art will understand that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention.

Some terms referred to in the present invention will be explained. Proximal refers to the end near the operator outside the body; distal refers to the end of the tissue to be closed that is located within the body; axial refers to the direction extending along the longitudinal axis of the hemostatic clip control wire; radial refers to the direction extending perpendicular to the axial direction; circumferential means in a circumferential direction around the axial direction.

Example 1

A first embodiment of a medical hemostatic clamp according to the present invention as shown in fig. 1-10, wherein the hemostatic clamp is a hair clip (as shown in fig. 1), and comprises a clamp assembly (not shown) including two or more clamps 1 arranged in an axial direction, a control wire 2 connecting each clamp 1 in the clamp assembly in series in the axial direction and capable of controlling the opening or closing of a distal-most clamp, the clamp 1 includes a clamp body (not shown) and a clamp seat 14, and a distal end of the control wire 2 is releasably connected to the clamp body of the distal-most clamp 11; the hair connecting clamp further comprises a handle 3 and a sheath tube 4, wherein the handle 3 is located at the proximal end of the control wire 2 and used for controlling the control wire 2 to move back and forth along the axial direction, the control wire 2 extends along the inner cavity of the sheath tube 4, the proximal end of the control wire is fixedly connected with a sliding block 31 on the handle 3, and the clamp assembly is located on the distal side of the inner cavity of the sheath tube. In this embodiment, it is preferable that the sheath tube 4 includes an inner sheath tube (as shown in fig. 2, the inner sheath tube includes a first inner sheath tube 42 at a distal end and a second inner sheath tube 43 at a proximal end) and an outer sheath tube 41 sleeved outside the inner sheath tube, the distal end of the outer sheath tube 41 has a limiting component 5 protruding from the distal end of the first inner sheath tube 42, and the distal-most clip 11 is releasably limited at the distal end of the sheath tube by the limiting component 5. In the actual operation process, the slider 31 on the handle 3 is moved back and forth to drive the control wire 2 to slide back and forth, so that the farthest clamp 11 is opened or closed, when the force of pulling the control wire to the proximal end is greater than a threshold value (i.e. the force capable of enabling the clamp to enter the locking position), the clamp body in the farthest clamp 11 is locked in the clamp seat 14, the control wire is continuously pulled to the proximal end, and when the force of pulling the control wire to the proximal end is greater than a threshold value (i.e. the force capable of enabling the release assembly to be pulled out of the release duct), the clamp is separated from the release assembly. As shown in FIG. 11, by moving the control wire 2 in the direction of the dotted line, the distal end portion of the control wire pushes the distal-most clip 11 distally to be fully withdrawn distally from the sheath 4, thereby releasing the distal-most clip 11.

Next, the specific structure of the limiting component 5 in this embodiment will be further described. As shown in fig. 3-4 and 10, the proximal end of the limiting component 5 is fixedly connected to the distal end of the outer sheath 41, the distal end has a plurality of limiting bosses 51 arranged circumferentially, and the protruding surface of each limiting boss 51 faces the axial direction of the sheath. As shown in fig. 10, in this embodiment 1, there are 4 circumferentially distributed limiting bosses 51, each limiting boss 51 forms a notch 52, and the depth and width of the notch define the deformation amplitude of the limiting boss 51 which expands outward when pressed. The outer peripheral wall of the holder 14 of the distal-most clip 11 is provided with a biasing means 15, and the biasing means 15 is releasably retained in a space defined between the retaining projection 51 and the distal end of the first inner sheath 42. Specifically, the biasing mechanism 51 on the holder 14 is pre-formed in an outward-expanding shape, and when the distal-most clip 11 is pushed to a loaded state from the inner cavity of the first inner sheath 42 to the distal end, the biasing mechanism 15, which is originally elastically constrained by the inner wall of the first inner sheath, is no longer constrained and expands outward; the proximal end of the biasing mechanism 15 abuts against the distal end surface of the inner sheath 42, and the outer side surface of the biasing mechanism 15 abuts against the protruding surface on the inner side of the limiting boss 51, so that the biasing mechanism 15 is releasably limited in the space formed between the limiting boss 51 and the distal end of the first inner sheath 42. At this time, since the holder 14 is limited, the clip can slide back and forth in the holder when the front and rear slide-control wires 2, thereby achieving repeatable opening or closing of the clip arms.

In the process of releasing the clip, the control wire 2 is pulled to the near end at first, the farthest end clip 11 is in a locked state, the control wire 2 is continuously pulled to the near end, the release assembly is released from the release hole, then as shown in fig. 11, by pushing the control wire 2 to the far end, after the far end of the control wire is abutted to the near end of the clip body, the clip body is pushed by the control wire 2 to move to the far end and drive the clip seat 14 to move to the far end together, and when the force of the biasing mechanism 15 abutting against the protruding surface on the inner side of the limiting boss 51 is greater than a threshold value, the limiting boss 51 radially expands and releases the farthest end clip 11.

In addition, in this embodiment, the limiting component 5 and the distal end of the outer sheath tube may be an integrally formed structure, and those skilled in the art may change the structure according to actual needs, all within the protection scope of the present invention.

As can be seen from the description of embodiment 1, the utility model discloses an adopt 5 structures of spacing subassembly to realize the repeatedly switching of clip, the clip can relapse the switching more than five times at least, and convenient centre gripping repeatedly positioning in advance many times to do benefit to and place the hemostasis centre gripping in the most appropriate position, reach best hemostasis effect, avoided because improper centre gripping and reload new clip. In clinical use, a doctor can insert the hemostatic clip device once, and can release a plurality of hemostatic clips to fully hemostatic clip the focus, so that the release process of each clip is stable and reliable, and the ineffective release process caused by unsuccessful clip clipping can be avoided.

To achieve rotatable operation of the proximal operator end of the clip, a rotation control assembly 6 is provided at the proximal end in this embodiment 1, and the specific structure and operation will be further described. As shown in fig. 9, the second inner sheath 43 extends proximally to be fixedly connected with the distal end of the handle, and the region of the proximal end extending out of the outer sheath 41 is provided with the rotation control assembly 6; the control wire in the embodiment 1 comprises a first control wire 21 at the far end side and a second control wire 22 at the near end side, wherein the near end of the first control wire 21 is movably connected with the far end of the second control wire 22; wherein, the rotating control assembly 6 is fixedly connected to the proximal end of the first control wire 21, and the rotating control assembly 6 is rotated to control the first control wire 21 to rotate relative to the second control wire. The rotating control assembly 6 includes a distal knob 61 located at a proximal free end of the first control wire 21, and a first stop block 62 and a second stop block 63 located at a proximal spaced apart position relative to the first control wire 21, the first stop block 62 and the second stop block 63 being configured to limit the displacement of the second control wire 22 relative to the first control wire 21 in the longitudinal direction.

In the embodiment 1, the second inner sheath 43 has a hole (not shown) for extending the first control wire 21, which is described in detail in the detailed description of the specific structure and the specific implementation manner for driving the first control wire 21 to rotate. A first stop block 62 and a second stop block 63 are fixed at the proximal side of the first control wire 21 at intervals, the distal end of the second control wire 22 has a tunnel structure (not labeled in the figure), the end of the first control wire 21 passes through the tunnel structure and extends out of the extending hole on the second inner sheath tube 43, so as to realize the movable connection between the first control wire 21 and the second control wire 22, and the free movable distance of the second control wire relative to the first control wire is limited between the first stop block 62 and the second stop block 63. The proximal end of the second control wire 22 is fixedly connected with a slide block 31 on the handle 3. When the sliding block 31 slides, the second control wire 22 is driven to slide back and forth, and when the second control wire 22 moves to the far end, the far end of the second control wire 22 abuts against and pushes the first limiting block 62, so that the first control wire 21 is driven to move forwards; when the second control wire 22 moves proximally, the distal end of the second control wire abuts and pulls the second stop block 63, and the distal end of the second control wire 22 drags the first control wire 21 to move proximally. Since the first control wire 21 is movably extended from the extending hole of the second inner sheath 43, when the first control wire 21 moves back and forth along the axial direction, the free end of the first control wire 21 is not constrained by the sheath and other parts, so that the control wire can effectively move along the axial direction.

The utility model discloses an additionally design with the rotation control subassembly being close to doctor's operation end, overcome among the prior art only can be through the rotatory technical defect of nurse operation handle end control clip, realized doctor operation position department and just can adjust the rotation angle of the first control line 21 of distal end wantonly and then the technological effect of adjustment clip angle, can stretch out the sheath pipe position according to the nimble rotation control subassembly of adjusting of doctor's position in the actual operation moreover, greatly promoted operation flexibility in the operation. In the actual operation process, after the distal-most clamp 11 is loaded, when the clamp arm is in an open state, a doctor can adjust the rotation angle of the clamp arm by rotating the tail end knob 61 according to the actual focus position, shape and the like without integrally rotating the hemostatic clamp or adjusting the operation position in the nurse operation, so that the friction of the human cavity tissue of the sheath catheter arm can be reduced, the damage of an instrument to a human body is reduced, and the use safety of the instrument is improved; on the other hand, the flexibility of angle adjustment is greatly improved, and the convenience of operation is improved.

As an alternative structure to the embodiment 1, the second inner sheath 43 is provided with the extension hole, the extension hole in the embodiment 1 is changed to a knob slide groove provided in the second inner sheath 43 and extending in the axial direction, the second stopper 63 is located inside the knob slide groove and fixedly connected to the first control wire 21, and the rotation control member is located inside the slide groove and axially moves in a limited manner. When the sliding block 31 slides, the second control wire 22 is driven to slide back and forth, and when the second control wire 22 moves to the far end, the far end of the second control wire 22 abuts against and pushes the first limiting block 62, so that the first control wire 21 is driven to move forwards; as the second control wire 22 moves proximally, the distal end of the second control wire 22 pulls the first control wire 21 proximally. Since the first control wire 21 is movably extended from the knob sliding slot on the second inner sheath 43, when the first control wire 21 moves back and forth along the axial direction, the free end of the first control wire 21 is not constrained by the sheath and other parts, so that the control wire can effectively move along the axial direction.

In addition, to first control line and second control line connected mode among embodiment 1 to can realize guaranteeing that the second control line can drive under the prerequisite of first control line back-and-forth movement, first control line can be for the second control line free rotation, arbitrary realizable connected mode all should the utility model discloses a within the scope.

Next, a further description is given of a connection manner between the outer sheath and the inner sheath, as shown in fig. 9, in embodiment 1, the outer sheath 41 and the second inner sheath 43 can move relatively, and the proximal end of the outer sheath 41 is movably connected to the outer wall of the proximal end portion of the second inner sheath 43 through a movable limiting member 7. The proximal end of the movable limiting member 7 is provided with a fixed connecting portion 71 fixedly connected with the outer wall of the inner sheath, a positioning slide rod 72 is arranged on the fixed connecting portion 71 and extends towards the far end, correspondingly, the proximal end of the outer sheath 41 is provided with a positioning member 44, the positioning member 44 is provided with a slide channel 45, the positioning slide rod 72 extends towards the far end through the slide channel 45, and the far end of the positioning slide rod 72 is provided with a flange so that the positioning member 44 cannot be separated from the far end of the positioning slide rod, the positioning member 44 on the outer sheath 41 can perform limiting movement between the flange structure of the positioning slide rod 72 and the fixed connecting portion 71, and the maximum movement of the movement is that the limiting boss 51 on the limiting component 5 is pulled to the far end outer side of the inner sheath, so that the required moving distance of the.

As an alternative structure to the movable connection manner between the outer sheath and the inner sheath in this embodiment 1, the manner of the positioning sliding rod 72 and the sliding channel 45 in embodiment 1 are changed, specifically, the movable limiting member has a limiting track structure, the proximal end of the movable limiting member is fixedly connected to the outer wall of the inner sheath, the structure provided with the limiting track extends along the longitudinal axis to the distal end, and accordingly, the distal end of the outer sheath has a limiting slider adapted to the limiting track and can slide axially along the limiting track, and the movable limiting connection between the outer sheath 41 and the inner sheath can also be achieved. Of course, except the connection mode of the present invention, any current mode that can realize the movable limit connection between the outer sheath tube 41 and the inner sheath tube all belongs to the protection scope of the present invention.

The preferred clip structure of the present invention is further illustrated, as represented by the distal-most clip shown in fig. 3-7. Each of the clips 1 includes a clip body (not shown) and a clip seat 14 sleeved on a proximal end of the clip body, wherein a distal end of the clip body is provided with a pair of oppositely arranged clipping arms 13, proximal ends of the clipping arms are received in the clip seat channel, and the clipping arms can be opened or closed under the biasing action of the inner wall of the clip seat 14; the proximal end of the clip body is provided with a release hole 19, the distal end of the control wire 2 is provided with a release component 23 which is in releasable connection with the release hole 19, when the pulling force applied to the control wire 2 is greater than a threshold value, the release component 23 is released from the release hole 19, and the threshold value refers to the maximum pulling force applied to the control wire at the moment of release and is determined by the radial expansion elasticity of the release hole and the deformation characteristic of the release component 23 at the distal end of the control wire. In this embodiment, the axial section of the release assembly is nearly in an "i" shape, the release hole 19 is engaged with the groove in the "i" shape when the release hole is not removed, and the release hole 19 is in any releasable structure such as a long strip, a circle, or an ellipse, which can achieve the above technical effects.

Further, as shown in fig. 4-6, the clip body is an integrally formed proximal "U" shaped clip, the distal end of the clip body has a pair of clip arms 13 axially symmetrical, the proximal end has a release opening 19 for passing the distal end of the control wire 2, and the distal side of the release opening 19 has a radially symmetrical spring 16, which is compressible when subjected to a radially biasing force. The clamp holder 14 is cylindrical, the far-end side wall of the clamp holder 14 is axially and symmetrically provided with a biasing mechanism 15, the biasing mechanism is an elastic piece capable of radially biasing, the near-end side wall of the clamp holder 14 is provided with an elastic piece sliding groove 17, and when the clamp 1 is not locked, an elastic piece 16 at the near end of the clamp body slides back and forth in the elastic piece sliding groove 17, so that structural support can be provided for the clamp to be opened and closed repeatedly; furthermore, the clip runner 17 has a locking groove 18 at the proximal end, and the clip is locked when the control wire is pulled proximally and the clip 16 is forced into the locking groove 18.

The overall structure of the clip assembly and the releasing and loading process will be further described with reference to fig. 2 and 8. For the embodiment 1, the clip assembly can be roughly divided into a distal-most clip 11 (as shown in fig. 2) and an unloaded clip (as shown in fig. 8) at the proximal end of a first inner sheath, wherein the inner sheath includes a first inner sheath 42 at the distal end for accommodating a plurality of clips and a second inner sheath 43 at the proximal end for accommodating the control wire, and the two ends are fixedly connected (as shown in fig. 2), and the clip is initially limited in the first inner sheath 42. When the distal-most clip 11 is loaded and positioned at the distal-most end of the first inner sheath, the release assembly at the distal end of the control wire is releasably engaged with the release aperture 19 at the rear end of the clip body. The unloaded clamps are positioned at the near ends of the far-end clamps 11, the near ends of the clamping arms are accommodated in the channels of the clamping seats 14, the control lines sequentially connect the unloaded clamps in series, namely the control lines penetrate through the release hole at the tail parts of the near-end clamps and are transmitted out from the two clamping arms of the clamps, then the unloaded clamps are sequentially connected in series in the same mode, the clamps are not connected with the control lines, and the control lines cannot influence the shapes and the performances of the unloaded clamps in the moving process. After releasing the distal-most clip 11, the control wire moves proximally until the release assembly at the distal end of the control wire opens and closes with the release aperture at the tail of the distal-most clip, effecting loading of a new clip. The loading process from the release of the clamp to the new clamp cannot influence the clamp which is not loaded at the back, the stability of the performance of the clamp is ensured, and the influence of the processes of the release, the loading and the like of the clamp is avoided.

Example 2

As shown in fig. 12, the connection between the outer sheath and the inner sheath in example 1 was changed. In this embodiment 2, the proximal end of the outer sheath 41 is directly and fixedly connected to the outer wall of the second inner sheath 43 through the fixing connection portion 71, and accordingly, the release of the distal-most clip 11 can be controlled by the movement of the control wire in the release process, for a specific operation process, reference may be made to an operation manner of releasing the clip by the control wire in embodiment 1, which is not described herein again.

Example 3

As shown in fig. 13, based on the basic structure of embodiment 1, in this embodiment 4, the outer sheath 41 and the inner sheath are replaced with a relatively movable structure. The outer sheath 41 can also be moved during the process of releasing the distal-most clip 11, specifically, during the process of releasing the clip, the releasing assembly is also detached from the releasing hole of the distal-most clip 11, and then, as shown by the direction of the dotted line in fig. 13, by pulling the outer sheath proximally, the protruding surface on the inner side of the limiting boss 51 is radially expanded by the radial and axial pressing of the first inner sheath, and then pulled to the outer periphery of the distal end of the first inner sheath, and the distal-most clip 11 is released. It can be seen that based on embodiment 1 and this embodiment 3, the utility model discloses in can realize the release of clip through two kinds of modes, the operation is more nimble, and the doctor can select suitable operation mode according to different positions, the form of operation in actual operation process.

Example 4

As shown in fig. 14, the structure of the limiting assembly in embodiment 1 is changed, the limiting bosses 51 with 4 circumferential distributions in embodiment 1 are replaced by the limiting bosses 51 with 3 circumferential distributions, each limiting boss 51 forms a notch 52, and the depth and the width of the notch define the deformation amplitude of the limiting boss 51 which expands outwards when being pressed. The number of the limiting bosses can be changed, the radial expansion tension and the deformation range of the limiting bosses can be controlled, the appropriate limiting assembly form can be flexibly selected according to the actual operation scene, and of course, the number of the limiting bosses can be correspondingly increased or decreased according to the actual size, the application scene and other requirements, so that the most releasing effect can be obtained.

Example 5

As shown in fig. 15, the structure of the limiting component in embodiment 1 is changed, in this embodiment, the limiting component is integrally formed with the outer sheath 41, the limiting component 5 is a symmetrical elastic sheet extending from the end of the outer sheath to the distal end, the elastic sheet is bent in the axial direction to form a limiting boss 51 structure, and a space for limiting the distal-most clip is formed between the two symmetrically arranged limiting bosses 51 and the distal end surface of the inner sheath 42. During release of the clip, the resilient tab is urged outwardly by a biasing mechanism on the outer peripheral surface of the clip. The deformation amplitude of the limiting boss 51 expanding outwards can be achieved by adjusting the material of the elastic sheet. The structure in this embodiment is simple and the release process is easy to control.

Example 6

As shown in fig. 16, the structure of the limiting member in embodiment 1 is changed, in this embodiment, the limiting member is integrally formed with the outer sheath 41, the limiting member 5 is a cylindrical structure extending from the end of the outer sheath to the distal end, the distal end of the cylindrical structure is circumferentially distributed with elastic pieces bent in the axial direction to form a limiting boss 51, and a space for limiting the distal-end clip is formed between the circumferentially distributed bent limiting boss 51 and the distal end surface of the inner sheath 42. During release of the clip, the inwardly bent resilient tab is urged outwardly by a clip peripheral surface biasing mechanism. The deformation amplitude of the limiting boss 51 expanding outwards can be achieved by adjusting the material of the elastic sheet. The structure in this embodiment is simple and the release process is easy to control.

Example 7

As shown in fig. 17, in the embodiment 1, the inner and outer sheath structures are changed, in this embodiment, a single sheath structure is adopted, the sheath 4 has a limiting component 5 at the distal end, the limiting component 5 has a limiting space at the proximal side facing the axial direction of the sheath, and at least a part of the distal-most clip 11 is releasably limited in the limiting space by the limiting component 5. In this embodiment, the limiting space is defined by a plurality of axially arranged limiting bosses 51 and limiting parts 53 protruding inward from the proximal end of the limiting assembly 5, the outer peripheral wall of the holder 14 of the distal-most clip 11 is provided with a biasing mechanism 15 (referring to the distal-most clip structure shown in fig. 2-3), and the biasing mechanism 15 is releasably limited in the limiting space formed between the limiting bosses 51 and the limiting parts 53. In the releasing process, the control wire 2 is pulled towards the near end at first, the farthest end clamp 11 is in a locking state, the control wire 2 is pulled towards the near end continuously, the releasing assembly is separated from the releasing pore channel, then the control wire 2 is pushed towards the far end, after the far end of the control wire is abutted to the near end of the clamp body, the clamp body is pushed by the control wire 2 to move towards the far end and drive the clamp seat 14 to move towards the far end together, and when the force of the biasing mechanism 15 abutting against the protruding surface on the inner side of the limiting boss 51 is larger than a threshold value, the limiting boss 51 expands radially and releases the farthest end clamp 11.

In this embodiment, the sheath 4 and the limiting component 5 may be integrally formed, or may be assembled after being manufactured according to actual assembly and manufacturing requirements.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (15)

1. A medical hemostatic clamp at least comprises the following structures:

a clip assembly comprising at least one axially aligned clip;

the control wire is used for connecting the clamp assemblies in series along the axial direction and controlling the opening or closing of the most distal clamp by moving the control wire, the clamp comprises a clamp body and a clamp seat, and the distal end of the control wire is in releasable connection with the clamp body of the most distal clamp;

the handle is positioned at the proximal end of the control wire and is used for controlling the control wire to move back and forth;

a sheath, the control wire extending along the sheath lumen, the clip assembly located on a distal side of the sheath lumen;

the sheath far end is provided with a limiting assembly, the proximal end side of the limiting assembly is provided with a limiting space facing the axial direction of the sheath, and at least one part of the most far end clamp is limited in the limiting space by the limiting assembly in a releasable manner.

2. The medical hemostatic clip of claim 1, wherein:

the distal end of the limiting assembly is provided with a limiting boss arranged circumferentially to form the limiting space at the proximal side of the limiting boss, and the peripheral wall of the holder of the distal-most clamp is provided with a biasing mechanism which is releasably limited in the limiting space at the proximal side of the limiting boss.

3. The medical hemostatic clip of claim 2, wherein:

the limiting boss extends towards the axial direction of the sheath tube, and when the radial expansion force received by the protruding surface of the limiting boss is larger than a threshold value, the limiting boss radially expands and releases the farthest end clamp.

4. The medical hemostatic clip of claim 2, wherein:

the sheath pipe includes interior sheath pipe and the cover is located the sheath pipe in the interior sheath pipe outside, spacing subassembly is located sheath pipe distal end, just constitute between spacing boss proximal end side and the interior sheath pipe distal end and be used for spacingly the most distal clip spacing space.

5. The medical hemostatic clip of claim 4, wherein:

the outer sheath tube and the inner sheath tube can move relatively, and the near end of the outer sheath tube is movably connected to the outer wall of the near end part of the inner sheath tube through a movable limiting part.

6. The medical hemostatic clip of claim 5, wherein:

the structure of the movable limiting part is as follows (1) or (2):

(1) the near end of the movable limiting piece is fixedly connected with the outer wall of the inner sheath tube, the far end of the movable limiting piece is provided with a limiting track, and the near end of the outer sheath tube axially limits and moves along the limiting track;

(2) the outer sheath tube near-end has the setting element that is equipped with slide channel, the fixed connection portion of activity locating part near-end and inner sheath tube outer wall fixed connection, be equipped with on the fixed connection portion and extend to the distal end through slide channel's location slide bar just location slide bar distal end is spacing in the setting element.

7. The medical hemostatic clip of claim 1, wherein:

the control wire comprises a first control wire at the far end side and a second control wire at the near end side, and the near end of the first control wire is movably connected with the far end of the second control wire; wherein the first control wire proximal end has a rotational control assembly that controls rotation of the first control wire relative to the second control wire.

8. The medical hemostatic clip of any one of claims 1-7, wherein:

the proximal end of the clamp body of each clamp is provided with a release hole, the distal end of the control wire is provided with a release component which is in releasable connection with the release hole, and when the pulling force applied to the control wire is larger than a threshold value, the release component is pulled out of the release hole.

9. A medical hemostatic clamp at least comprises the following structures:

a clip assembly comprising at least one axially aligned clip;

the control wire is used for connecting the clamp assemblies in series along the axial direction, the opening or closing of the most distal clamp is controlled by moving the control wire, the clamp comprises a clamp body and a clamp seat, and the distal end of the control wire is in releasable connection with the clamp body of the most distal clamp;

the handle is positioned at the proximal end of the control wire and is used for controlling the control wire to move back and forth;

a sheath, the control wire extending along the sheath lumen, the clip assembly located on a distal side of the sheath lumen;

the control wire comprises a first control wire at the far end side and a second control wire at the near end side, and the near end of the first control wire is movably connected with the far end of the second control wire; wherein, the proximal end of the first control wire is provided with a rotary control component for controlling the first control wire to rotate relative to the second control wire.

10. The medical hemostatic clip of claim 9, wherein:

the rotary control assembly comprises a terminal knob located at the proximal free end of the first control wire, and a first limiting block and a second limiting block which are located at the proximal side of the first control wire and are arranged at intervals, wherein the first limiting block and the second limiting block are used for limiting the second control wire to move in the axial direction relative to the first control wire.

11. The medical hemostatic clip of claim 10, wherein:

the sheath pipe comprises an inner sheath pipe and an outer sheath pipe sleeved on the outer side of the inner sheath pipe, the limiting component is located at the far end of the outer sheath pipe, and a limiting space used for limiting the farthest end clamp is formed between the near end side of the limiting component and the far end of the inner sheath pipe.

12. The medical hemostatic clip of claim 11, wherein:

the rotating control assembly is arranged at the proximal end part of the inner sheath tube, and the rotating control assembly is connected with the inner sheath tube in a mode of any one of the following (1) or (2):

(1) the inner sheath tube is provided with a knob sliding groove, and when the control line slides forwards and backwards, the rotary control assembly is positioned in the knob sliding groove and moves in an axial limiting manner;

(2) the inner sheath tube is provided with an extending hole of the rotary control assembly, and the proximal free end of the first control wire movably extends out of the extending hole.

13. The medical hemostatic clip of any one of claims 11-12, wherein:

the outer sheath tube and the inner sheath tube can move relatively, and the near end of the outer sheath tube is movably connected to the outer wall of the near end part of the inner sheath tube through a movable limiting part.

14. The medical hemostatic clip of claim 13, wherein:

the structure of the movable limiting part is as follows (1) or (2):

(1) the near end of the movable limiting piece is fixedly connected with the outer wall of the inner sheath tube, the far end of the movable limiting piece is provided with a limiting track, and the near end of the outer sheath tube axially limits and moves along the limiting track;

(2) the outer sheath tube near-end has the setting element that is equipped with slide channel, the fixed connection portion of activity locating part near-end and inner sheath tube outer wall fixed connection, be equipped with on the fixed connection portion and extend to the distal end through slide channel's location slide bar just location slide bar distal end is spacing in the setting element.

15. The medical hemostatic clip of any one of claims 9-12, wherein:

the proximal end of the clamp body of each clamp is provided with a release hole, the distal end of the control wire is provided with a release component which is in releasable connection with the release hole, and when the pulling force applied to the control wire is larger than a threshold value, the release component is pulled out of the release hole.

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