Surgical instrument for minimally invasive delivery of tissue repair patch

Abstract

The invention discloses a surgical instrument for minimally invasive delivery of a tissue repair patch, comprising a housing with a holding portion, and further comprising: a delivery portion having one end mounted in the housing, the delivery portion being used for loading a patch to be implanted and releasing and unfolding the patch at a target position after the patch is delivered to the target position; and the driving part is arranged on the shell, is in transmission connection with the delivery part and is used for driving the delivery part to release and unfold the patch. The surgical instrument provided by the invention effectively solves the problem that a large-area and large-volume tissue repair patch is difficult to deliver to a target cavity position in a body through a micro incision.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and more particularly to the field of surgical instruments for minimally invasive delivery of implants such as tissue repair patches. Background Art

[0002] Minimally invasive arthroscopic surgery is a surgical technique widely used in modern medicine, especially playing an important role in the treatment of joint diseases, such as knee meniscus injury, anterior and posterior cruciate ligament injury, rotator cuff injury, etc. With the rapid development of sports medicine, arthroscopic surgery is not limited to the knee joint, but also covers most diseases of the large joints of the whole body, such as the shoulder joint, hip joint, elbow joint, etc.

[0003] During minimally invasive arthroscopic surgery, the surgeon inserts an arthroscope and surgical instruments through small incisions around the joint to observe and treat the inside of the joint, which has the advantages of small trauma, fast recovery, and significant curative effect. In order to improve the repair effect and avoid postoperative recurrence, tissue repair patches are often implanted during minimally invasive arthroscopic surgery. Such patches are usually made of absorbable or non-absorbable biomaterials, such as polyester, polylactic acid, collagen, or decellularized tissue, etc. The tissue repair patch can provide sufficient mechanical strength to support and promote tissue regeneration. With the development of technology, various micro-cutting, grasping, suturing and other surgical instruments have been developed, which can operate flexibly in the narrow joint space. However, in most minimally invasive implant surgeries, the patch is still directly inserted into the body through the wound, having problems such as inconvenient deployment and easy breakage. At the same time, since the new bionic structure patches usually have a layered design feature, it is necessary to distinguish the front and back sides during implantation, so there are higher requirements for the delivery and fixation capabilities during the minimally invasive surgery process.

[0004] Therefore, there is still a need for a surgical instrument that can deliver a large-area and large-volume tissue repair patch to a specific joint cavity position in the body through a small incision. Summary of the Invention

[0005] The present invention provides a surgical instrument for minimally invasive delivery of tissue repair patches such as rotator cuff, including but not limited to the surgical scenario of delivering a tissue repair patch to a target position in the human body through a small incision under arthroscopic assistance.

[0006] An embodiment of the present invention provides a design, material, and manufacturing method of a surgical instrument, which includes: a delivery part, a driving part, and a housing.

[0007] A surgical instrument for minimally invasive delivery of a tissue repair patch, including a housing with a holding part, further including:

[0008] A delivery part installed at one end inside the casing, which is used to load the patch to be implanted and release and deploy the patch at the target position after the patch is delivered to the target position;

[0009] A driving part installed on the casing, which is in transmission connection with the delivery part and is used to drive the delivery part to release and deploy the patch.

[0010] Furthermore, the delivery part includes:

[0011] A sleeve component, which is used to load the patch to be implanted and can release the patch thereon under the drive of the driving part;

[0012] An unfolding component, which is arranged inside the sleeve component and is used to unfold the released test piece under the drive of the driving part;

[0013] A connecting component, one end of which is connected to the inside of the casing, and the other end is connected to the unfolding component and the sleeve component, and is used to realize the installation of the unfolding component, the sleeve component and the casing.

[0014] In the present invention, the delivery part is mainly the part components that enter the patient's body and are used to deliver the tissue repair patch, and is divided into an unfolding component, a connecting component and a sleeve component. The unfolding component is used to unfold and fix the patch, the connecting component is used to connect the power device of the driving part, and the sleeve component is used to load the patch to be implanted.

[0015] The sleeve component has two main working states, one is the retracted state of retracting the unfolding component and the test piece to be processed, and the other is the released state of releasing the test piece. The unfolding component has an unfolded state and a retracted state.

[0016] The driving part is mainly the part components that provide power, and is divided into a first driving component and a second driving component. The first driving component is in transmission connection with the sleeve component and drives it to switch between the retracted state and the released state, and is used to release the patch carried in the sleeve component. The second driving component is in transmission connection with the unfolding component and is used to switch it between the unfolded state and the retracted state to realize the unfolding of the unfolding arm of the unfolding component.

[0017] The casing, the holding part of which is mainly the part held by the operator during use, has a grip and a trigger that are more ergonomically designed. The trigger is connected to the second driving component, which is convenient for the operator to use; at the same time, the setting of the casing also provides an installation space for the delivery part and the driving part.

[0018] Furthermore, the sleeve component includes an inner sleeve and an outer sleeve arranged coaxially;

[0019] One end of the inner sleeve is fixedly connected to the connecting component, and the unfolding component is arranged inside the inner sleeve; at the corresponding position of the inner sleeve, there is an avoidance hole for the unfolding component;

[0020] The outer sleeve is slidably arranged outside the inner sleeve, connected to the driving part at one end, and can axially move under the drive of the driving part, and has: a retracted state that restricts the patch to be implanted on the outer wall of the inner sleeve and a released state that releases the patch to be implanted away from the inner sleeve.

[0021] Under the drive of the driving part.

[0022] Furthermore, the deployment component includes:

[0023] A deployment frame with its length direction arranged along the axial direction of the sleeve component; two sets of deployment arm groups arranged along the length direction on the deployment frame; each set of deployment arm groups includes two symmetrically arranged deployment arms, and one ends of the two deployment arms are both hinged to a sliding shaft member slidably arranged on the frame;

[0024] Two corresponding sets of deployment link groups, each set of deployment link groups includes two symmetrically arranged deployment links, one ends of the two deployment links are both hinged to a fixed shaft member on the deployment frame, and the other ends are respectively hinged to the corresponding deployment arms;

[0025] A first elastic telescopic member arranged between the two sliding shaft members;

[0026] The sliding shaft member is connected to the driving part and can axially move along the deployment frame under the drive of the driving part, synchronously driving the deployment arms to deploy or contract.

[0027] Furthermore, the first elastic telescopic member selects a tension spring.

[0028] The deployment frame, deployment links and deployment arms of the deployment component form a centric crank-slider mechanism, which can switch between the deployed state and the contracted state. The fixed shaft member and the sliding shaft member can both adopt mother and son screws, acting as a hinge and a slider respectively. The mother and son screw acting as the slider (i.e., the sliding shaft member) is the driving part, and its movement range is limited in the chute of the deployment frame.

[0029] Preferably, there are two sets of deployment arm groups, and the directions of the two sets of deployment arms are opposite; after deployment, an approximately rectangular structure is formed, which can fix the patch more stably; furthermore, the deployment arms of the deployment component are divided into a first deployment arm and a second deployment arm. After the mechanism is deployed, the first deployment arm faces the first direction, and the second deployment arm faces the opposite second direction, fixing the four corners of the deployed patch to prevent the patch from retracting.

[0030] A sleeve is arranged on the outer layer of the deployment component, which is the inner sleeve in the sleeve component. The patch is curled around the inner sleeve during the process of implanting into the human body to avoid being directly contacted with the deployment component and being worn and damaged.

[0031] A sleeve is provided between the inner sleeve and the outer layer of the patch, which is the outer sleeve in the sleeve component. The outer sleeve is sleeved around the patch during the process of implanting the patch into the human body to prevent the patch from being deformed due to squeezing and friction with human tissue.

[0032] Furthermore, the driving part includes a first driving component and a second driving component; the first driving component is transmission-connected to the outer sleeve, capable of driving the outer sleeve to move axially, for releasing the patch carried in the sleeve component; the second driving component is transmission-connected to the sliding shaft, capable of driving the sliding shaft to move axially, for driving the deployment arm to deploy.

[0033] Furthermore, the first driving component is a button slidably arranged on the casing, and the button is fixed to the outer wall of the outer sleeve through a sliding seat; the second driving component is a trigger slidably arranged on the casing, and the trigger is connected to the sliding shaft through a power pull rope.

[0034] Furthermore, the power pull rope of the second driving component is connected to the trigger through the trigger connecting buckle, and can provide a pulling force in the second direction to drive the deployment arm of the deployment component to deploy. The trigger of the grip part can move in the second direction, and the operator pulls the trigger to provide the driving force in the second direction.

[0035] Furthermore, the casing is provided with three slots for locking the button, which respectively correspond to the retracted state of restricting the implanted patch to the outer wall of the inner sleeve, the released state of releasing the patch to be implanted, and the three positions when the outer sleeve is further retracted to expose the power rope connecting buckle when replacing the delivery part.

[0036] Furthermore, the housing includes a front housing, an upper housing and a lower housing. The front housing is provided with an outer sleeve avoidance hole, which also serves as a guide. The button is slidably arranged on the upper housing, and a corresponding slide groove is arranged on the upper housing; the button of the first driving component has three locking positions, that is, the slide groove of the upper housing has three notches, and the three locking positions are sequentially along the second direction: loading between the inner and outer sleeves to be implanted, moving the outer sleeve back after the patch is implanted, and further moving the outer sleeve back when replacing the deployment component. The button in the three states drives the locking position of the outer sleeve.

[0037] Preferably, a safety member for locking the second driving component in an initial state is provided in the housing.

[0038] Furthermore, the holding part is arranged at the bottom of the housing. In addition to the trigger and the grip, a safety part and a coaxially hinged compression spring are also arranged on the holding part. The top of the safety part is hinged to the lower housing of the fuselage through a pin shaft. A lever is arranged on one side facing the trigger, and the side facing away from the trigger is a force application surface. In the initial state, the lever of the safety part abuts against the trigger under the action of the compression spring, and at this time the trigger is in a locked state and cannot be pressed. When the user holds the force application surface and presses the safety part, the lever is separated from the trigger, and at this time the trigger is in a movable state. At this time, an acting force can be applied to pull the trigger in the second direction.

[0039] Further, the connecting component includes a connecting head and a connecting pipe; one end of the connecting head is fixed to the unfolding component and the sleeve component, and the other end is detachably fixed to the connecting pipe; the connecting pipe is fixed in the casing.

[0040] Furthermore, use the connecting fixing screw to fix the unfolding component at one end of the connecting head close to the first direction (that is, the end where the unfolding component is arranged). The end of the connecting head close to the second direction (that is, the other end facing away from the first end) is connected to the connecting pipe. Most of the connecting pipe is located in the casing. The unfolding component leads out a power pulling rope, and is connected to the driving part through the power rope connecting buckle. In order to transmit the driving tension of the driving part to the unfolding component to realize the movement switching between the unfolding state and the contraction state.

[0041] Further, a detachable power rope connecting buckle is arranged in the connecting pipe. One connecting end of the power rope connecting buckle is connected to the power pulling rope, and the other connecting end is connected to a transmission rope arranged in the connecting pipe; a trigger connecting buckle is also arranged in the casing. The top end of the trigger connecting buckle passes through the avoidance hole on the connecting pipe and is connected to the other end of the transmission rope, and the bottom end of the trigger connecting buckle is fixedly connected to the trigger.

[0042] Compared with the prior art, the present invention has the following advantages:

[0043] (1) The present invention adopts a modular design and is divided into a delivery part that needs to enter the human body, a driving part that provides power, and a holding part that is operated by the surgical staff according to requirements and functions. Each part is relatively independent and can be quickly disassembled and assembled. Among them, the delivery part that needs to enter the human body is a stainless steel processed part and can be sterilized; it is simple to disassemble from the driving part and is convenient to replace after one-time use.

[0044] (3) The present invention has a lower cost. The driving part and the holding part can be reused for a long time, and the structure is simple, with high reliability and not easy to fail.

[0045] (3) The deployment arm portion of the present invention can extend in two opposite directions, namely the first direction and the second direction, while other delivery instruments can only extend in one direction. It can fix a larger area of the patch and can fix the four corners of the patch simultaneously, making the patch less likely to retract.

[0046] (4) The holding portion of the present invention has a grip and a trigger that are more ergonomically designed. The trigger is provided with a safety component, so that the operator can only trigger the trigger when holding the grip with a normal hand grip. Otherwise, the trigger is in a locked state to prevent the operator from accidentally touching the trigger and damaging the patch or deploying the patch in advance before it reaches the predetermined position. Description of the Drawings

[0047] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0048] Figure 2 is a schematic diagram of the structure of the patch in a curled state in an embodiment of the present invention;

[0049] Figure 3 is Figure 2 an end view of the curled state of the patch shown, showing the specific curling method of the patch;

[0050] Figure 4 is a schematic diagram of the structure of the patch in an unfolded state in an embodiment of the present invention;

[0051] Figure 5 is a schematic diagram of the structure of the deployment arm of the delivery portion in an unfolded state in an embodiment of the present invention;

[0052] Figure 6 is a schematic diagram of the structure of the deployment arm of the delivery portion in a contracted state in an embodiment of the present invention;

[0053] Figure 7 is a schematic diagram of the driving method of the deployment component of the delivery portion in an embodiment of the present invention;

[0054] Figure 8 is a schematic diagram of the connection and fixing method of the connection head of the delivery portion, as well as the connection method of the power pull rope in an embodiment of the present invention;

[0055] Figure 9 is a cross-sectional view of the first driving component and the second driving component of the driving portion in an embodiment of the present invention;

[0056] Figure 10 is Figure 9 a cross-sectional view after the first driving component is driven as shown;

[0057] Figure 11 is Figure 9 a cross-sectional view after the second driving component is driven as shown;

[0058] Figure 12 Schematic structural diagram of the installation and connection between the driving part and the holding part of the embodiment of the present invention;

[0059] Figure 13 Cross-sectional view of the locking of the trigger and the safety part of the holding part of the embodiment of the present invention;

[0060] Figure 14 is Figure 13 Cross-sectional view of the unlocking of the trigger and the safety part of the holding part shown;

[0061] Explanation of reference numerals: 01, crimped patch; 02, deployed patch. 100, delivery part: 110, deployment component, 111, deployment frame, 112, deployment link, 113, first deployment arm, 114, second deployment arm, 115, tension spring, 116, fixed shaft part, 117, sliding shaft part; 120, connection component, 121, connection head, 122, connection fixing screw, 123, power rope connection buckle, 124, connection pipe; 130, sleeve component, 131, inner sleeve, 132, outer sleeve, 133, avoidance hole. 200, driving part: 210, button, 211, sliding seat, 212, button seat; 220, power pull rope, 221, trigger connection buckle; 231, front housing of the fuselage, 232, upper housing of the fuselage, 233, lower housing of the fuselage. 300, holding part: 311, trigger, 312, safety part, 313, compression spring, 314, pin shaft, 315, lever, 316, slide bar; 321, grip. A: first direction; B: second direction. Detailed implementation manners

[0062] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. It should be clear that the specific embodiments described here are only used to explain the present invention and do not constitute a limitation to the present invention. Based on the embodiments of the present invention, all other implementation manners deduced by those of ordinary skill in the art without creative work belong to the protection scope of the present invention.

[0063] Refer to Figure 1 , a surgical instrument for minimally invasive delivery of tissue repair patches such as rotator cuff, including: a delivery part 100, a driving part 200 and a housing, and the holding part 300 is below the housing. Figure 1 In, A and B respectively represent the first direction and the second direction. The delivery part 100 includes a deployment component 110, a connection component 120 and a sleeve component 130 arranged along the first direction A ( Figure 1The middle is transparently set, and of course, a transparent part can also be selected itself). The unfolding component 110 is the key part for unfolding and fixing the patch; the connecting component 120 is used to connect the power device of the driving part and plays a role in transmitting power; the sleeve component 130 is used to load the patch to be implanted and plays a protective role during the process of the patch passing through a small wound in the human body.

[0064] See also Figure 2 , the driving part 200 mainly includes a first driving component and a second driving component arranged in the casing. The first driving component is used to release the patch carried in the sleeve component. The first driving component uses the button 210 shown in the figure, and controls the movement of the outer sleeve 132 in the sleeve component through different locking positions of the button 210, thereby realizing the release operation of the patch; the second driving component is the trigger 311 arranged below the casing, which is used to drive the unfolding arm of the unfolding component 110 to unfold.

[0065] The holding part 300 is mainly the part held by the operator, and at the same time, the trigger 311 and the safety part 312 are installed. The trigger 311 is used as the second driving component, and the operator drives the unfolding component to unfold by pulling the trigger. Figures 2 to 14 Shows the specific structures and functions of the components of the present invention.

[0066] Such as Figure 2 , the sleeve component 130 includes an inner sleeve 131 and an outer sleeve 132 arranged coaxially. The inner sleeve 131 is fixed relative to the casing, and the outer sleeve 132 is sleeved on the outer wall of the inner sleeve 131. The unfolding component 110 is telescopically arranged in the inner sleeve 131. Such as Figure 2 and Figure 3 shown, shows the structure of the patch in the curled state of the embodiment of the present invention (where the patch in the curled state is defined as patch 01). Select a suitable commercial tissue repair patch according to the surgical needs, which is usually a rectangular thin sheet. The patch is curled around the inner sleeve 131. During the curling process, it is necessary to ensure that all parts of the patch are evenly attached to the inner sleeve 131 to avoid local over-tightening or over-loosening, and form a curled patch 01.

[0067] The end view of the curled patch 01 in one case is as Figure 3 shown, one end of it is flush with the left horizontal line, and after winding around the inner sleeve 131 for one circle, the other end is flush with the right horizontal line, that is, it winds around the inner sleeve 131 for one and a half circles in total. Figure 3The shown one is not the only structure of the crimped patch 01. Generally, it is only necessary to ensure that the two ends of the patch are symmetrically arranged left and right. At the same time, when rolling the patch, it is necessary to ensure that the patch is located below the unfolding component 110 after unfolding, which is convenient for fixing the patch. Inside the inner sleeve 131 is the unfolding component 110. The unfolding component 110 is arranged inside the inner sleeve 131 to avoid direct contact with the crimped patch 01 and wear and damage the patch. Outside the inner sleeve 131 is the outer sleeve 132 to prevent the crimped patch 01 from being interfered by the outside world during the operation.

[0068] The overall size of the delivery part 100 is small, which is convenient for minimally invasive operation. In the design, the gap between the inner sleeve 131 and the outer sleeve 132 needs to be small enough to reduce the overall size of the delivery part 100 and meet the requirements of implanting through a small incision. However, at the same time, it is necessary to meet the space requirements of the crimped patch 01 to avoid friction or extrusion of the crimped patch 01 during the relative movement between the sleeves.

[0069] As Figure 4 shown, the structure of the patch in the unfolded state of the embodiment of the present invention is shown (defining the patch in the unfolded state as patch 02 for distinction). When the delivery part 100 reaches the surgical target position, as the outer sleeve 132 retracts along the second direction B, the external restraint on the patch is released, and at this time, under the action of an external force, the patch can be freely unfolded. In this embodiment, the unfolding arms of the unfolding component 110 inside the inner sleeve 131 extend out, enabling the patch to form an unfolded patch 02 in the body.

[0070] In this embodiment, the inner sleeve 131 is a hollow tubular structure. At the relative positions of the unfolding link 112, the first unfolding arm 113, and the second unfolding arm 114 (see Figure 6 ), four rectangular avoidance holes 133 are opened using a laser cutting process to avoid interference with the movement of the unfolding component.

[0071] As Figure 5 and Figure 6 shown, the specific structure of the unfolding component of the delivery part of the embodiment of the present invention is shown, including the contraction ( Figure 5 ) and unfolding ( Figure 6) Specific structures of the two states. The unfolding component 110 mainly consists of an unfolding frame 111, two sets of link mechanisms arranged on the unfolding frame 111, and a tension spring 115 arranged between the two link mechanisms. The two sets of link mechanisms are arranged oppositely. Each set of link mechanisms consists of two unfolding links 112 symmetrically arranged in the horizontal direction, two unfolding arms (the first unfolding arm 113 or the second unfolding arm 114), a fixed shaft member 116, and a sliding shaft member 117. Among them, both the fixed shaft member 116 and the sliding shaft member 117 can adopt parent-child screws. The fixed shaft member 116 is used to hinge one end of the two unfolding links 112 to the unfolding frame 111, mainly playing a hinging role. The other ends of the two unfolding links 112 are respectively hinged to positions near the middle of the corresponding unfolding arms. The sliding shaft member 117 is hinged to the connection ends of the two unfolding arms, and at the same time, the sliding shaft member 117 is slidably arranged in a chute arranged on the unfolding frame 111, realizing sliding guidance while achieving hinging. Both ends of the tension spring 115 are respectively connected to the sliding shaft members 117 in the two sets of link mechanisms, playing a role of pulling them inward. The unfolding frame 111, the unfolding links 112, and the unfolding arms (the first unfolding arm 113 and the second unfolding arm 114) constitute a centric crank-slider mechanism. The sliding shaft member 117 plays a key connecting and supporting role, being both a hinge and a slider. The stroke of the slider is restricted within the chute of the unfolding frame 111.

[0072] When the mechanism is in the contracted state, the first unfolding arm 113 and the second unfolding arm 114 are subjected to the elastic force of the tension spring 115 and move closer to the middle, contracting with the unfolding links 112 to a position close to the unfolding frame 111, as shown in Figure 5 .

[0073] When the mechanism is in the unfolded state, by applying a pulling force and a reverse pulling force along the first direction A and the second direction B to the tension spring 115 through the power pulling rope 220 (see Figure 7 ), the sliding shaft member 117 as a slider drives the first unfolding arm 113 to move along the first direction A, and the second unfolding arm 114 to move along the second direction B. At the same time, it unfolds under the restriction of the unfolding links 112. The two move simultaneously to fix the four corners of the unfolded patch 02. This two-way unfolding mechanism can ensure that the patch is fully unfolded and avoid the patch from retracting, see Figure 4 and Figure 6 .

[0074] As Figure 7As shown in the figure, the driving mode of the power pulling rope according to the embodiment of the present invention is shown. A power pulling rope 220 is arranged inside the inner sleeve. The power pulling rope 220 is divided into two strands. One strand is directly connected to one end of the pulling spring close to the connecting head 121 to provide a pulling force along the second direction B. The other strand bypasses the fixed shaft member 116 at the farthest end and is connected to the end of the pulling spring away from the connecting head 121 to provide a pulling force along the first direction A. Therefore, when pulling the two strands of power pulling rope 220 along the second direction B, the two sliding shaft members 117 move away from each other. Under the limiting action of the unfolding connecting rod 112, the first unfolding arm 113 and the second unfolding arm 114 can both achieve the unfolding movement at the same time. Further, as Figure 5 and Figure 6 shown, the longitudinal stacking mode of the unfolding component according to the embodiment of the present invention is shown. There are two fixed shaft members 116 in total and two sliding shaft members 117 in total. Among them, the two fixed shaft members 116 at the nearest end and the farthest end from the connecting head 121 only act as hinges, while the two middle sliding shaft members 117 are both hinges and sliders. All the fixed shaft members 116 and the sliding shaft members 117 penetrate through the entire unfolding frame 111. In order to minimize the volume during contraction, the unfolding arms and the unfolding connecting rods are stacked in a staggered manner up and down. For example, the first unfolding arms 113 on both sides are not in the same longitudinal layer, the first unfolding arm 113 and the second unfolding arm 114 on the same side are not in the same layer, and the unfolding connecting rod 112 and the unfolding arm of the same link mechanism are not in the same layer.

[0075] As Figure 8 shown, the connection and fixing method of the connection head of the delivery part according to the embodiment of the present invention, as well as the connection method of the power pulling rope 220, are shown. One end of the connecting head 121 is provided with an unfolding frame insertion slot and an inner sleeve insertion slot, and the other end is provided with a connecting pipe insertion slot. At the same time, positioning holes are provided on the outer wall of the connecting head 121, and positioning holes are also provided at the corresponding positions of the inner sleeve 131. The unfolding frame 111 and the inner sleeve 131 are fixed to one end of the connecting head 121 close to the first direction A through four connecting and fixing screws 122. One end of the connecting head 121 close to the second direction B is inserted and connected to the connecting pipe 124. The connecting and fixing screws 122 ensure the stability of the connection and prevent the unfolding component 110 from loosening or detaching from the connecting head 121 during the operation. The power rope connection buckle 123 divides the power pulling rope 220 into two parts (the part arranged in the inner sleeve at one end is the power pulling rope I part, which is connected to the sliding shaft member to realize the driving of the unfolding part, and the other end is arranged in the connecting pipe 124, and this end is connected to the trigger connection buckle 221, and this part is the power pulling rope II part). The power rope connection buckle 123 itself can be disassembled, so that the power pulling rope of the delivery part can be separated from the rear, reflecting the modular design of the present invention, which is simple to load and unload and is convenient to replace after one-time use.

[0076] Preferably, the materials of the components of the delivery part 100 include stainless steel, meeting the requirements of surgical disinfection.

[0077] As shown Figures 9 to 11 in the figure, the specific working modes of the first driving component and the second driving component of the driving part of the embodiment of the present invention are shown. The first driving component is the button 210. The button 210 is fixed to the outer wall of the outer sleeve tube 132 through the button base 212 and the sliding base 211. The second driving component is the trigger 312. The trigger 312 is connected to the unfolding part through the trigger connecting buckle 221 and the power pulling rope 220 to realize the driving of the unfolding part.

[0078] The housing includes a front housing 231, an upper housing 232 and a lower housing 233 of the fuselage. A through hole for the outer sleeve tube 132 to pass through is provided on the front housing 231 of the fuselage, and this through hole also plays a role of limiting and guiding. The button 213, the button base 212 and the sliding base 211 are arranged inside the upper housing 232 of the fuselage. The trigger connecting buckle 221 is arranged inside the lower housing 233 of the fuselage.

[0079] A trigger connecting buckle avoidance hole is provided on one side of the connecting pipe 124. The power pulling rope 220 passes through the connecting pipe 124 and is connected to the top end of the trigger connecting buckle 221. The bottom end of the trigger connecting buckle 221 is inserted into the positioning hole on the trigger 311 to realize the connection with the trigger 311 of the holding part; when the trigger 311 is pulled, the pulling force can be transmitted to the unfolding component 110 through the trigger connecting buckle 221 and the power pulling rope 220 to realize the stretching action of the unfolding arm.

[0080] As shown Figure 9 in the figure, a first guide rail is arranged inside the upper housing 232 of the fuselage in the cross-sectional view. The outer sleeve tube is fixed on the sliding base 211. The sliding base 211 is provided with a guide groove or a guide protrusion that cooperates with the first guide rail. The guide protrusion and the first guide rail cooperate, and the sliding base 211 can move in the upper housing of the fuselage in a set direction and is controlled by the button base 212 and the button 213 thereon. The button 213 has three locking positions, and the three notches of the upper chute of the upper housing 232 of the fuselage correspond to them. These three locking positions are, in sequence along the second direction B, the three positions when the patch to be implanted is loaded between the inner and outer sleeve tubes, when the outer sleeve tube retracts after the patch is implanted, and when the outer sleeve tube further retracts when replacing the unfolding component. A second guide rail is also arranged inside the lower housing 233 of the fuselage in the cross-sectional view. The trigger connecting buckle 221 can move in the guide rail of the lower housing of the fuselage and is used to connect the trigger to drive the power pulling rope 220 to move.

[0081] The trigger connecting buckle 221 is integrally a columnar structure. The top end is provided with a positioning hook fixed to the power pulling rope 220 therein through the avoidance hole of the connecting pipe 124 and a positioning protrusion that cooperates with the second guide rail. The bottom of the trigger connecting buckle 221 is a cylindrical structure and is used for plugging and fixing with the positioning hole at the top of the trigger 311.

[0082] Furthermore, Figure 9 the positions of the components of the driving part when the patch is loaded in a curled state between the inner and outer sleeve tubes are shown.Figure 10 It shows the positions of the various components of the driving part after the patch reaches the predetermined position and the first driving component drives the outer sleeve to retract. Figure 11 The positions of the various components of the driving part are shown when the second driving component drives the lower unfolding arm to unfold and fix the flattening patch.

[0083] like Figure 12 As shown, the detachable structural design of the driving part and the holding part of the embodiment of the present invention is demonstrated, which further embodies the modular structural design of the present invention.

[0084] like Figure 13 and Figure 14 As shown, the grip and trigger of the gripping part of the embodiment of the present invention are shown, which have a more ergonomic design, as well as the locking and unlocking methods of the trigger and the safety member. A third guide rail is provided inside the grip 321, and the trigger 311 can slide along the third guide rail inside the grip, and the safety member 312 can rotate around the pin 314, that is, the safety member 312 is connected to the grip 321 through the pin 314.

[0085] like Figure 13 As shown, a compression spring 313 is provided between the safety member 312 and the trigger 311, and the two ends of the compression spring 313 are respectively pressed against the corresponding sides of the safety member 312 and the trigger 311. Only when the safety member 312 is pressed can the trigger 311 be pressed along the second direction B to avoid accidental touch by the operator.

[0086] When the trigger 311 is in the locked state, due to the action of the compression spring 313, the free end of the safety piece 312 is lifted up. At this time, the lever 315 arranged on the safety piece 312 presses against the slide bar 316 arranged on the trigger 311, thereby limiting the slide bar of the trigger 311 and preventing the trigger 311 from being triggered.

[0087] like Figure 14 As shown, when the trigger 311 is in the unlocked state, the bottom end of the safety member 312 is pressed down along the first direction A, the compression spring 313 is compressed, and the lever of the safety member 312 releases the limit of the slide bar 316 of the trigger 311, and the trigger can be freely triggered along the second direction B. At this time, the user applies pressure in the second direction B, and the trigger drives the trigger connecting buckle 221 and the power pull rope 220 to move, thereby driving the deployment component to extend outward.

[0088] Furthermore, only when the operator holds the handle normally, the base of the hand will press the safety element down along the first direction A. Otherwise, the trigger is in a locked state to prevent the operator from accidentally touching the trigger and damaging the patch or the patch from being deployed prematurely before reaching the predetermined position.

[0089] In addition, although the specific structure and main functions of the preferred embodiments of the present invention are shown and described above, those skilled in the art should understand that the present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, various changes and improvements can be made to it, and these changes and improvements all fall within the scope of the present invention claimed. The present invention is not limited to the specific embodiments disclosed in the text, but includes all scopes of the appended claims and their equivalents.

Claims

1. A surgical instrument for minimally invasive delivery of a tissue repair patch, comprising a housing with a gripping portion, characterized in that: Also includes: A delivery portion with one end mounted in the housing, the delivery portion is used to load the patch to be implanted, and release and deploy the patch at the target location after the patch is delivered to the target location; The driving part installed on the casing is drivingly connected with the delivery part and is used for driving the delivery part to release and unfold the patch.

2. The surgical instrument for minimally invasive delivery of tissue repair patches according to claim 1, characterized in that: The delivery part includes: The sleeve component is used to load the patch to be implanted and can release the patch thereon under the drive of the driving part; An unfolding component is arranged in the sleeve component and is used for unfolding the released test piece when driven by the driving part; The connecting component is used to realize the installation of the expansion component, the sleeve component and the casing.

3. The surgical instrument for minimally invasive delivery of tissue repair patches according to claim 2, characterized in that: The sleeve component comprises an inner sleeve and an outer sleeve which are coaxially arranged; One end of the inner sleeve is fixedly connected to the connecting component, and the inner sleeve is provided with the deployment component; meanwhile, a deployment component avoidance hole is provided at a corresponding position of the inner sleeve; The outer sleeve is slidably arranged outside the inner sleeve, connected to the driving part, and can move axially under the drive of the driving part. It has: a retracted state that restricts the implanted patch to the outer wall of the inner sleeve and a released state that releases the implanted patch away from the inner sleeve.

4. The surgical instrument for minimally invasive delivery of tissue repair patches according to claim 2, characterized in that: The unfolding component comprises: An expansion frame is arranged along the axial direction of the sleeve component in the length direction; Two groups of unfolding arm groups are arranged on the unfolding frame along the length direction; each group of unfolding arm groups includes two symmetrically arranged unfolding arms, and one end of the two unfolding arms is hinged to a sliding shaft member slidably arranged on the frame; Two corresponding deployment link groups, each deployment link group includes two symmetrically arranged deployment links, one end of the two deployment links is hinged to a fixed shaft on the deployment frame, and the other end is hinged to the corresponding deployment arm; A first elastic telescopic member disposed between the two sliding shaft members; The sliding shaft is connected to the driving part and can move axially along the unfolding frame when driven by the driving part, thereby synchronously driving the unfolding arm to unfold or retract.

5. The surgical instrument for minimally invasive delivery of a tissue repair patch according to claim 4, characterized in that: The driving part includes a first driving component and a second driving component; the first driving component is connected to the outer sleeve in a transmission manner, and can drive the outer sleeve to move axially, so as to release the patch carried in the sleeve component; the second driving component is connected to the sliding shaft in a transmission manner, and can drive the sliding shaft to move axially, so as to drive the deployment arm to deploy.

6. The surgical instrument for minimally invasive delivery of a tissue repair patch according to claim 5, characterized in that: The first driving component is a button slidably arranged on the casing, and the button is fixed to the outer wall of the outer sleeve through a sliding seat; the second driving component is a trigger slidably arranged on the casing, and the trigger is connected to the sliding shaft through a power pull rope.

7. The surgical instrument for minimally invasive delivery of a tissue repair patch according to claim 5, characterized in that: A safety piece for locking the second driving component in an initial state is arranged in the casing.

8. The surgical instrument for minimally invasive delivery of a tissue repair patch according to claim 6, characterized in that: The connecting component comprises a connecting head and a connecting pipe; one end of the connecting head is fixed to the unfolding component and the sleeve component, and the other end is detachably fixed to the connecting pipe; the connecting pipe is fixed in the casing.

9. The surgical instrument for minimally invasive delivery of a tissue repair patch according to claim 8, characterized in that: A detachable power rope connecting buckle is provided in the connecting tube, one connecting end of the power rope connecting buckle is connected to the power pull rope, and the other connecting end is connected to the transmission rope arranged in the connecting tube; a trigger connecting buckle is also provided in the casing, the top end of the trigger connecting buckle passes through the avoidance hole on the connecting tube and is connected to the other end of the transmission rope, and the bottom end of the trigger connecting buckle is connected and fixed to the trigger.

10. The surgical instrument for minimally invasive delivery of a tissue repair patch according to claim 9, characterized in that: The casing is provided with three notches for locking the button, which respectively correspond to the retracted state of restricting the implanted patch to the outer wall of the inner sleeve, the released state of releasing the patch to be implanted, and the three positions when the outer sleeve is further retracted to expose the power rope connecting buckle when replacing the delivery part.

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