A surgical instrument for minimally invasive delivery of a tissue repair patch

Abstract

The application discloses a surgical instrument for minimally invasive delivery of tissue repair patches, comprising a casing with a holding part, further comprising: a delivery part mounted at one end in the casing, the delivery part being used for loading the patch to be implanted and releasing and unfolding the patch at the target position after the patch is delivered to the target position; a driving part mounted on the casing and in transmission connection with the delivery part, used for driving the delivery part to release and unfold the patch. The surgical instrument effectively solves the problem that large-area and large-volume tissue repair patches are difficult to be delivered to the target chamber position in the body through a small incision.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and in particular to surgical instruments for the minimally invasive delivery of implants such as tissue repair patches. Background Technology

[0002] Minimally invasive arthroscopic surgery is a widely used surgical technique in modern medicine, playing a crucial role, especially in the treatment of joint diseases such as meniscus tears, anterior and posterior cruciate ligament injuries, and rotator cuff tears in the knee. With the rapid development of sports medicine, arthroscopic surgery is no longer limited to the knee joint but also covers most diseases of large joints throughout the body, including the shoulder, hip, and elbow joints.

[0003] In minimally invasive arthroscopic surgery, surgeons make tiny incisions around the joint, insert an arthroscope and surgical instruments, and observe and treat the internal structure of the joint. This method offers advantages such as minimal trauma, rapid recovery, and significant therapeutic effects. To improve repair outcomes and prevent postoperative recurrence, tissue repair patches are frequently implanted in minimally invasive arthroscopic surgery. These patches are typically made of absorbable or non-absorbable biomaterials, such as polyester, polylactic acid, collagen, or decellularized tissue. These tissue repair patches provide sufficient mechanical strength to support and promote tissue regeneration. With technological advancements, various micro-cutting, grasping, and suturing surgical instruments have been developed, allowing for flexible operation within the confined joint space. However, in most minimally invasive implant surgeries, patches are still directly inserted through the incision, which presents challenges such as difficulty in deployment and susceptibility to breakage. Furthermore, because novel biomimetic patches often feature a layered design, the front and back sides must be distinguished during implantation, thus placing higher demands on the delivery and fixation capabilities of the minimally invasive surgical process.

[0004] Therefore, there is still a need for a surgical instrument that can deliver large-area, large-volume tissue repair patches to specific joint cavity locations within the body through tiny incisions. Summary of the Invention

[0005] This invention provides a surgical instrument for minimally invasive delivery of tissue repair patches such as rotator cuffs, including but not limited to surgical scenarios in which tissue repair patches are delivered to a target location in the human body through a tiny incision under arthroscopic assistance.

[0006] Embodiments of the present invention provide a design, material, and manufacturing method for a surgical instrument, the surgical instrument comprising: a delivery part, a drive part, and a housing.

[0007] A surgical instrument for minimally invasive delivery of tissue repair patches includes a housing with a gripping portion, and further includes:

[0008] One end is installed inside the housing, which is used to load the patch to be implanted and to release and unfold the patch at the target location after it is delivered to the target location;

[0009] The drive unit, mounted on the housing, is connected to the delivery unit and is used to drive the delivery unit to release and unfold the patch.

[0010] Furthermore, the delivery portion includes:

[0011] The cannula assembly is used to load the patch to be implanted, and the patch can be released from it under the drive of the drive unit;

[0012] The unfolding component, located inside the sleeve component, is used to unfold and release the test piece under the drive of the drive component;

[0013] The connecting component has one end connected to the inside of the housing and the other end 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 housing.

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

[0015] The sleeve component has two main operating states: a retracted state where the unfolding component and the test piece to be processed are retracted, and a released state where the test piece is released. The unfolding component has an unfolded state and a retracted state.

[0016] The drive section, which mainly provides power, is divided into a first drive component and a second drive component. The first drive component is connected to the sleeve component and drives it to switch between the retracted and released states to release the patch carried in the sleeve component. The second drive component is connected to the unfolding component and is used to switch it between the unfolded and retracted states to realize the unfolding arm of the unfolding component.

[0017] The housing, including the grip section, is mainly for the operator's hand during use. It features a more ergonomically designed handle and trigger, with the trigger connected to the second drive unit for easy operation. The housing also provides installation space for the delivery and drive components.

[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 provided inside the inner sleeve; at the same time, an unfolding component clearance hole is provided at a corresponding position in the inner sleeve.

[0020] The outer sleeve is slidably disposed on the outside of the inner sleeve, with one end connected to the driving part. It can move axially under the drive of the driving part and has the following states: a closed 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.

[0021] Under the drive of the driver section.

[0022] Furthermore, the unfolding component includes:

[0023] A deployment frame is arranged along the axial direction of the sleeve component in the length direction; two sets of deployment arm groups are arranged on the deployment frame in the length direction; each set of deployment arm groups includes two symmetrically arranged deployment arms, and one end of each deployment arm is hinged to a sliding shaft that is slidably arranged on the frame.

[0024] Two sets of unfolding linkage groups are set accordingly. Each set of unfolding linkage groups includes two symmetrically arranged unfolding linkages. One end of each of the two unfolding linkages is hinged to a fixed shaft on the unfolding frame, and the other end is respectively hinged to the corresponding unfolding arm.

[0025] A first elastic telescopic component is disposed between two sliding shaft components;

[0026] The sliding shaft is connected to the driving part and can move along the axial direction of the unfolding frame under the drive of the driving part, synchronously driving the unfolding arm to unfold or retract.

[0027] Furthermore, the first elastic telescopic component is selected as a tension spring.

[0028] The unfolding component's unfolding frame, unfolding connecting rod, and unfolding arm constitute a concentric crank-slider mechanism, capable of switching between unfolded and retracted states. Both the fixed and sliding shafts can be made of male and female screws, which respectively act as hinges and sliders. The male and female screws acting as sliders (i.e., sliding shafts) are the driving components, and their range of motion is limited to the sliding grooves of the unfolding frame.

[0029] Preferably, the unfolding arm assembly consists of two sets, with the two sets of unfolding arms facing each other; after unfolding, it forms an approximately rectangular structure, which can more stably fix the patch; furthermore, the unfolding arm of the unfolding component is divided into a first unfolding arm and a second unfolding arm. After the mechanism is unfolded, the first unfolding arm faces a first direction, and the second unfolding arm faces the opposite second direction, fixing the four corners of the unfolded patch to prevent the patch from retracting.

[0030] The outer layer of the unfolding component is provided with a sleeve, which is the inner sleeve in the sleeve component. During the implantation of the patch into the human body, it is rolled up around the inner sleeve to avoid direct contact with the unfolding component and thus avoid wear and damage.

[0031] The inner sleeve and the outer layer of the patch are provided with a sleeve, which is the outer sleeve in the sleeve component. The outer sleeve is wrapped around the patch during the patch implantation process to prevent the patch from being squeezed and rubbed against the human tissue and deformed.

[0032] Furthermore, the driving part includes a first driving component and a second driving component; the first driving component is drivenly connected to the outer sleeve and can drive the outer sleeve to move axially to release the patch loaded in the sleeve component; the second driving component is drivenly connected to the sliding shaft and can drive the sliding shaft to move axially to drive the unfolding arm to unfold.

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

[0034] Furthermore, the power cable of the second drive component is connected to the trigger via a trigger connector, providing a pulling force in the second direction to drive the unfolding arm of the unfolding component to unfold. The trigger of the grip portion can move in the second direction, and the operator pulls the trigger to provide driving force in the second direction.

[0035] Furthermore, the housing is provided with three slots for locking the button, corresponding to three positions: the retracted state of the inner sleeve containing the implanted patch, the released state of the patch to be implanted, and the outer sleeve further retracting to expose the power rope connection buckle when replacing the delivery part.

[0036] Furthermore, the housing includes a front housing, an upper housing, and a lower housing. The front housing has an outer sleeve clearance hole, which also serves as a guide. The button is slidably mounted on the upper housing, which has a corresponding groove. The button of the first driving component has three locking positions, corresponding to three slots in the upper housing groove. These three locking positions, along the second direction, are: when the patch is to be implanted between the inner and outer sleeves; after patch implantation, when the outer sleeve moves back; and when the outer sleeve moves further back during replacement of the unfolding component. The button in each of these three states drives the locking position of the outer sleeve.

[0037] Preferably, the housing is provided with a safety device to lock the second drive component in its initial state.

[0038] Furthermore, a grip portion is provided at the bottom of the outer casing. In addition to the trigger and grip, the grip portion also includes a safety component and a coaxially hinged compression spring. The top of the safety component is hinged to the lower casing of the body via a pin. A lever is provided on the side facing the trigger, and the side facing away from the trigger is the force application surface. In the initial state, the lever of the safety component abuts against the trigger under the action of the compression spring, and the trigger is locked and cannot be pressed. When the user presses down on the safety component with their hand on the force application surface, the lever disengages from the trigger, and the trigger is in a movable state. Only then can the trigger be pulled down in the second direction by applying force.

[0039] Furthermore, the connecting component includes a connector and a connecting tube; one end of the connector is fixed to the unfolding component and the sleeve component, and the other end is detachably fixed to the connecting tube; the connecting tube is fixed inside the housing.

[0040] Furthermore, the deployable component is fixed to the end of the connector near the first direction (i.e., the end where the deployable component is located) using the connecting screws, and the end of the connector near the second direction (i.e., the other end opposite to the first end) is connected to the connecting tube. Most of the connecting tube is located inside the housing. A power pull rope extends from the deployable component and is connected to the drive unit via the power rope connecting buckle. This transmits the driving force of the drive unit to the deployable component, enabling the switching between the deployed and retracted states.

[0041] Furthermore, the connecting tube is provided with a detachable power rope connecting buckle. One end of the power rope connecting buckle is connected to the power pull rope connection, and the other end is connected to the transmission rope set inside the connecting tube. The housing is also provided with a trigger connecting buckle. The top end of the trigger connecting buckle passes through the clearance hole on the connecting tube and is connected to the other end of the transmission rope. The bottom end of the trigger connecting buckle is connected and fixed 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, which is divided into a delivery part that needs to enter the human body, a driving part that provides power, and a gripping part for surgical personnel to operate according to needs and functions. Each part is relatively independent and can be quickly disassembled and assembled. The delivery part that needs to enter the human body is a stainless steel machined part that can be sterilized; it is easy to disassemble from the driving part and can be easily replaced after one-time use.

[0044] (3) The present invention has low 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 unfolding arm of the present invention, compared with other delivery devices that can only extend in one direction, can extend in two opposite directions, the first direction and the second direction, at the same time, which can fix a larger area of ​​patch and fix the four corners of the patch at the same time, making the patch less likely to shrink back.

[0046] (4) The grip part of the present invention has a more ergonomically designed handle and trigger. The trigger is equipped with a safety device so that the operator can only trigger the trigger when holding the handle normally. Otherwise, the trigger is locked to prevent the operator from accidentally touching the trigger and damaging the patch or prematurely unfolding the patch before it reaches the predetermined position. Attached Figure Description

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

[0048] Figure 2 This is a schematic diagram of the patch curled-up state structure according to an embodiment of the present invention;

[0049] Figure 3 for Figure 2 The end view shown here, depicting the patch in its curled-up state, illustrates the specific curling method of the patch.

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

[0051] Figure 5 This is a schematic diagram of the delivery section's unfolding arm in an embodiment of the present invention.

[0052] Figure 6 This is a schematic diagram of the delivery section's retracted arm in an embodiment of the present invention.

[0053] Figure 7 This is a schematic diagram of the driving method for the delivery part unfolding component according to an embodiment of the present invention;

[0054] Figure 8 This is a structural schematic diagram of the connection and fixing method of the delivery part connector and the connection method of the power pull rope in an embodiment of the present invention;

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

[0056] Figure 10 for Figure 9 The diagram shows a cross-sectional view of the first driving component after it has been driven.

[0057] Figure 11 for Figure 9 The diagram shows a cross-sectional view of the second drive component after it has been driven.

[0058] Figure 12 This is a schematic diagram of the installation and connection between the driving part and the gripping part according to an embodiment of the present invention;

[0059] Figure 13 This is a cross-sectional view of the locking structure of the grip portion trigger and safety component according to an embodiment of the present invention;

[0060] Figure 14 for Figure 13 A cross-sectional view showing the unlocking of the grip portion trigger and safety mechanism;

[0061] Explanation of reference numerals in the attached drawings: 01, retracted patch; 02, unfolded patch. 100, delivery section: 110, unfolding component; 111, unfolding frame; 112, unfolding connecting rod; 113, first unfolding arm; 114, second unfolding arm; 115, tension spring; 116, fixed shaft; 117, sliding shaft; 120, connecting component; 121, connector; 122, connecting screw; 123, power rope connecting buckle; 124, connecting tube; 130, sleeve component; 131, inner sleeve; 132, outer sleeve; 133, clearance hole. 200, drive section: 210, button; 211, sliding seat; 212, button seat; 220, power pull rope; 221, trigger connecting buckle; 231, front shell of fuselage; 232, upper shell of fuselage; 233, lower shell of fuselage. 300. Grip section: 311. Trigger; 312. Safety device; 313. Compression spring; 314. Pin; 315. Lever; 316. Slide lever; 321. Grip. A: First direction; B: Second direction. Detailed Implementation

[0062] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation thereof. All other implementation methods derived by those skilled in the art based on the embodiments of the present invention without creative work are within the protection scope of the present invention.

[0063] Reference Figure 1 A surgical instrument for minimally invasive delivery of tissue repair patches such as rotator cuffs, comprising: a delivery part 100, a drive part 200, and a housing, with a gripping part 300 below the housing. Figure 1 In this context, A and B represent the first direction and the second direction, respectively. The delivery section 100 includes an unfolding component 110, a connecting component 120, and a sleeve component 130 arranged along the first direction A. Figure 1The transparent setting is available, and of course, a transparent component can also be selected. The unfolding component 110 is a key part for unfolding and fixing the patch; the connecting component 120 is used to connect the power device of the drive 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 in the process of the patch passing through small wounds in the human body.

[0064] See also Figure 2 The drive unit 200 mainly includes a first drive component and a second drive component disposed within the housing. The first drive component is used to release the patch carried in the sleeve component. The first drive component adopts the button 210 shown in the figure. By controlling the movement of the outer sleeve 132 in the sleeve component through different locking positions of the button 210, the patch release operation is realized. The second drive component is a trigger 311 located at the bottom of the housing, which is used to drive the unfolding arm of the unfolding component 110 to unfold.

[0065] The grip portion 300 is mainly the part held by the operator, and it is also equipped with a trigger 311 and a safety device 312. The trigger 311 serves as a second driving component, and the operator drives the unfolding component to unfold by pulling the trigger. Figures 2 to 14 The specific structure and function of each component of the present invention are shown.

[0066] like Figure 2 The sleeve component 130 includes an inner sleeve 131 and an outer sleeve 132 coaxially arranged. The inner sleeve 131 is fixed relative to the housing, and the outer sleeve 132 is fitted onto the outer wall of the inner sleeve 131. The unfolding component 110 is telescopically disposed within the inner sleeve 131. Figure 2 and Figure 3 The diagram illustrates the structure of the patch in a rolled-up state according to an embodiment of the present invention (wherein the rolled-up patch is defined as patch 01). A suitable commercial tissue repair patch, typically a rectangular thin sheet, is selected based on surgical requirements. The patch is rolled up around the inner sleeve 131. During the rolling process, it is necessary to ensure that all parts of the patch are evenly attached to the inner sleeve 131, avoiding localized tightness or looseness, thus forming the rolled-up patch 01.

[0067] An end view of the coiled patch 01 in one case is shown below. Figure 3 As shown, one end of the sleeve is aligned with the horizontal line on the left. After being wound around the inner sleeve 131 once, the other end is aligned with the horizontal line on the right, meaning it is wound around the inner sleeve 131 for a total of one and a half turns. Figure 3The structure shown is not the only one for the rolled-up patch 01. Generally, it is sufficient to ensure that the two ends of the patch are symmetrically arranged. During rolling, the patch must be positioned below the unfolding component 110 after unfolding to facilitate fixation. The unfolding component 110 is located inside the inner sleeve 131, and its placement within the inner sleeve 131 prevents direct contact with the rolled-up patch 01, thus avoiding wear and damage. The outer sleeve 132 surrounds the inner sleeve 131 to prevent external interference to the rolled-up patch 01 during surgery.

[0068] The delivery section 100 has a small overall size, which facilitates minimally invasive procedures. During the design, the gap between the inner cannula 131 and the outer cannula 132 needs to be small enough to reduce the overall size of the delivery section 100 and meet the requirements for implantation in small incisions; however, it also needs to meet the space requirements of the retractable patch 01 to prevent friction or compression of the retractable patch 01 during the relative movement between the cannulas.

[0069] like Figure 4 The diagram illustrates the structure of the patch in its unfolded state according to an embodiment of the present invention (the patch in the unfolded state is defined as patch 02 for distinction). When the delivery portion 100 reaches the surgical target location, the external restraint on the patch is released as the outer sheath 132 retracts along the second direction B. Under external force, the patch can then unfold freely. In this embodiment, the unfolding arm of the unfolding component 110 within the inner sheath 131 extends, allowing the patch to form the unfolded patch 02 within the body.

[0070] In this embodiment, the inner sleeve 131 is a hollow tubular structure, which is connected to the unfolding connecting rod 112, the first unfolding arm 113, and the second unfolding arm 114 (see...). Figure 6 Four rectangular clearance holes 133 are made using laser cutting technology in the relative position of the components to avoid interference with the movement of the unfolded parts.

[0071] like Figure 5 and Figure 6 As shown, the specific structure of the delivery section unfolding component according to an embodiment of the present invention is illustrated, including the retraction of its unfolding arm ( Figure 5 ) and unfold ( Figure 6The specific structure of the two states of the unfolding component 110 is as follows: The unfolding component 110 mainly consists of an unfolding frame 111, two sets of linkage mechanisms mounted on the unfolding frame 111, and a tension spring 115 positioned between the two linkage mechanisms. The two sets of linkage mechanisms are arranged opposite to each other. Each set of linkage mechanisms consists of two horizontally symmetrically arranged unfolding connecting rods 112, two unfolding arms (first unfolding arm 113 or second unfolding arm 114), a fixed shaft 116, and a sliding shaft 117. Both the fixed shaft 116 and the sliding shaft 117 can be made of male and female screws. The fixed shaft 116 is used for... Two unfolding connecting rods 112 are hinged at one end to the unfolding frame 111, primarily serving a hinge function. The other ends of the two unfolding connecting rods 112 are respectively hinged to the corresponding unfolding arms near the middle. A sliding shaft 117 is hinged to the connecting end of the two unfolding arms, and simultaneously slidably disposed within a groove on the unfolding frame 111, achieving both hinge and sliding guidance. Two ends of a tension spring 115 are respectively connected to the sliding shafts 117 in the two sets of linkage mechanisms, exerting an inward pulling effect on the two sliding shafts 117. The unfolding frame 111, unfolding connecting rods 112, and unfolding arms (first unfolding arm 113 and second unfolding arm 114) constitute a concentric crank-slider mechanism. The sliding shaft 117 plays a crucial connecting and supporting role, acting as both a hinge and a slider, with the slider's stroke restricted within the groove of the unfolding frame 111.

[0072] When the mechanism is in the retracted state, the first deploying arm 113 and the second deploying arm 114 are pulled together by the elastic force of the tension spring 115, retracting to a position close to the deploying frame 111 along with the deploying connecting rod 112. Figure 5 .

[0073] When the mechanism is in the deployed state, it is activated by pulling the power cable 220 (see...). Figure 7 The tension spring 115 applies a pulling force along the first direction A and the second direction B, and a reverse pulling force, causing the sliding shaft 117, which acts as a slider, to drive 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. Simultaneously, both arms unfold under the constraint of the unfolding connecting rod 112, and their simultaneous movement fixes the four corners of the unfolded patch 02. This bidirectional unfolding mechanism ensures that the patch is fully unfolded and prevents it from retracting. See [link to documentation]. Figure 4 and Figure 6 .

[0074] like Figure 7As shown, the driving method of the power pull rope in this embodiment of the invention is illustrated. A power pull rope 220 is provided inside the inner sleeve. The power pull rope 220 is divided into two strands. One strand is directly connected to the end of the tension spring near the connector 121, providing tension along the second direction B. The other strand passes around the furthest fixed shaft 116 and connects to the end of the tension spring away from the connector 121, providing tension along the first direction A. Therefore, when the two power pull ropes 220 are pulled along the second direction B, the two sliding shafts 117 move away from each other. Under the restraining action of the unfolding connecting rod 112, the first unfolding arm 113 and the second unfolding arm 114 can simultaneously unfold. Further, as... Figure 5 and Figure 6 The diagram illustrates the longitudinal stacking arrangement of the unfolding components according to an embodiment of the present invention. There are two fixed shafts 116 and two sliding shafts 117. The two fixed shafts 116 closest to and farthest from the connector 121 act only as hinges, while the two middle sliding shafts 117 function as both hinges and sliders. All fixed shafts 116 and sliding shafts 117 extend through the entire unfolding frame 111. To minimize the volume during retraction, the unfolding arms and unfolding links are stacked in a staggered manner. For example, the first unfolding arms 113 on both sides are not on the same longitudinal layer, the first unfolding arm 113 and the second unfolding arm 114 on the same side are not on the same layer, and the unfolding link 112 of the same linkage mechanism is also not on the same layer as the unfolding arm.

[0075] like Figure 8 The diagram illustrates the connection and fixing method of the delivery part connector and the connection method of the power pull rope 220 according to an embodiment of the present invention. One end of the connector 121 is provided with a deployment frame insertion slot and an inner sleeve insertion slot, and the other end is provided with a connecting tube insertion slot. At the same time, the outer wall of the connector 121 is provided with a positioning hole, and the inner sleeve 131 is also provided with a positioning hole at the corresponding position. The deployment frame 111 and the inner sleeve 131 are fixed to the end of the connector 121 near the first direction A by four connecting fixing screws 122. The end of the connector 121 near the second direction B is inserted and connected to the connecting tube 124. The connecting fixing screws 122 ensure the stability of the connection and prevent the deployment part 110 from loosening or detaching from the connector 121 during the operation. The power rope connecting buckle 123 divides the power pull rope 220 into two parts (one end is set in the inner sleeve, which is the power pull rope I part, which is connected to the sliding shaft to drive the unfolding part; the other end is set in the connecting tube 124, which is connected to the trigger connecting buckle 221, which is the power pull rope II part). The power rope connecting buckle 123 itself can be disassembled, so that the power pull rope of the delivery part can be separated from the rear, which reflects the modular design of the present invention, which is simple to install and disassemble and easy to replace after one-time use.

[0076] Preferably, the materials of each component of the delivery section 100 include stainless steel to meet surgical sterilization requirements.

[0077] like Figures 9 to 11 The diagram illustrates the specific operation of the first and second driving components of the driving section according to an embodiment of the present invention. The first driving component is a button 210, which is connected to the sliding seat 211 via a button base 212 and a sliding seat 211. The outer wall of the outer sleeve 132 is fixed to the sliding seat 211. The second driving component is a trigger 311, which is connected to the unfolding section via a trigger connecting buckle 221 and a power pull rope 220 to drive the unfolding section.

[0078] The housing includes a front housing 231, an upper housing 232, and a lower housing 233. The front housing 231 has a through hole for the outer sleeve 132 to pass through, which also serves as a guide and limiter. A button 210, a button base 212, and a sliding base 211 are located inside the upper housing 232. A trigger connector 221 is located inside the lower housing 233.

[0079] A trigger connection buckle clearance hole is provided on one side of the connecting tube 124. The power pull rope 220 passes through the connecting tube 124 and is connected to the top of the trigger connection buckle 221. The bottom end of the trigger connection buckle 221 is inserted into the positioning hole on the trigger 311 to connect with the trigger 311 of the grip part. When the trigger 311 is pulled, the pulling force can be transmitted to the unfolding part 110 through the trigger connection buckle 221 and the power pull rope 220 to realize the extension action of the unfolding arm.

[0080] like Figure 9 As shown in the cross-sectional view, the upper shell 232 of the fuselage has a first guide rail inside, and the outer sleeve is fixed on the sliding seat 211. The sliding seat 211 has a guide groove or guide protrusion that cooperates with the first guide rail. The guide protrusion cooperates with the first guide rail, and the sliding seat 211 can move in a set direction inside the upper shell of the fuselage, controlled by the button seat 212 and the button 210 on it. The button 210 has three locking positions, which correspond to the three slots of the upper sliding groove of the upper shell 232. These three locking positions along the second direction B are, in order, the positions when the patch to be implanted is loaded between the inner and outer sleeves, when the outer sleeve is retracted after the patch is implanted, and when the outer sleeve is further retracted when replacing the unfolded part. The lower shell 233 of the fuselage also has a second guide rail inside, and the trigger connecting buckle 221 can move in the lower shell guide rail of the fuselage to connect the trigger drive power pull rope 220 to move.

[0081] The trigger connector 221 has a cylindrical structure. The top end has a positioning hook that passes through the avoidance hole of the connecting tube 124 and is fixed to the power pull rope 220 inside, as well as a positioning protrusion that cooperates with the second guide rail. The bottom of the trigger connector 221 has a cylindrical structure for insertion and fixing with the positioning hole on the top of the trigger 311.

[0082] Furthermore, Figure 9 This demonstrates the position of each component in the drive section where the patch is wound and loaded between the inner and outer sleeves. Figure 10 This demonstrates the positions of each component in the drive section after the first drive unit retracts the outer sleeve once the patch reaches its predetermined position. Figure 11 The positions of each component in the drive section are shown when the unfolding arm unfolds and fixes the flattened patch under the drive of the second drive component.

[0083] like Figure 12 As shown, the structural design of the drive part and the grip part of the present invention can be detached, which further reflects the modular structural design of the present invention.

[0084] like Figure 13 and Figure 14 The diagram illustrates the grip and trigger of an embodiment of the present invention, featuring a more ergonomic design, and the locking and unlocking methods for the trigger and safety. A third guide rail is provided inside the grip 321, allowing the trigger 311 to slide along this rail. The safety 312 can rotate around a pin 314, meaning the safety 312 is connected to the grip 321 via the pin 314.

[0085] like Figure 13 As shown, a compression spring 313 is provided between the safety device 312 and the trigger 311. The two ends of the compression spring 313 abut against the corresponding sides of the safety device 312 and the trigger 311, respectively. Only when the safety device 312 is pressed can the trigger 311 be pulled down in the second direction B, so as to avoid accidental activation by the operator.

[0086] When the trigger 311 is in the locked state, the free end of the safety element 312 is lifted due to the action of the compression spring 313. At this time, the lever 315 provided on the safety element 312 abuts against the slide bar 316 provided 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 element 312 is pressed down along the first direction A, the pressure spring 313 is compressed, the lever of the safety element 312 releases the limit on 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 to the second direction B, the trigger drives the trigger connecting buckle 221 and the power pull rope 220 to move, thereby driving the unfolding component to extend outward.

[0088] Furthermore, the safety device will only be pressed down in the first direction A by the thumb and forefinger of the operator when the handle is held normally. Otherwise, the trigger will be locked to prevent the operator from accidentally triggering the trigger and damaging the patch or the patch from deploying prematurely before reaching the predetermined position.

[0089] Furthermore, although the preferred specific structures and main functions of the embodiments of the present invention have been shown and described above, those skilled in the art should understand that the present invention is not limited to the above embodiments. Various changes and modifications can be made to it without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed. The present invention is not limited to the specific embodiments disclosed herein, but includes the full scope 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 include: One end mounted in the shell delivery part, the delivery part for loading the patch to be implanted, and after the patch delivery to the target position, the patch is released and deployed in the target position; The driving part is installed on the shell, which is in driving connection with the delivery part, and is used to drive the delivery part to release and deploy the patch; The delivery part includes: Sleeve component for loading the patch to be implanted, while under the drive of the driving part, the patch on it can be released; The deployment component is arranged in the sleeve component, which is used to deploy the released patch under the drive of the driving part; The connecting component is used to realize the mounting of the deployment component, the sleeve component and the shell; The sleeve component includes coaxially arranged inner sleeve and outer sleeve; One end of the inner sleeve is fixedly connected with the connecting component, and the inner sleeve is provided with the deployment component avoiding hole at the corresponding position of the inner sleeve; The outer sleeve is slidably arranged outside the inner sleeve and connected with the driving part, which can move axially under the drive of the driving part, and has the following two states: the folded state of limiting the implanted patch on the outer wall of the inner sleeve and the release state of releasing the implanted patch away from the inner sleeve.

2. The surgical instrument for minimally-invasive delivery of a tissue repair patch of claim 1, wherein, The deployment component includes: The length direction of the deployment frame is arranged along the axial direction of the sleeve component; Two groups of deployment arm groups are arranged on the deployment frame along the length direction; each group of deployment arm groups includes two symmetrically arranged deployment arms, and one end of each of the two deployment arms is hingedly connected with a sliding shaft member slidably arranged on the frame; Two groups of deployment link groups are arranged correspondingly, each group of deployment link groups includes two symmetrically arranged deployment links, one end of each of the two deployment links is hingedly connected with a fixed shaft member on the deployment frame, and the other end is hingedly connected with the corresponding deployment arm; A first elastic expansion member is arranged between the two sliding shaft members; The sliding shaft member is connected with the driving part and can move axially along the deployment frame under the drive of the driving part, which synchronously drives the deployment arm to expand or contract.

3. The surgical instrument for minimally-invasive delivery of a tissue repair patch of claim 2, wherein, The driving part includes a first driving component and a second driving component; the first driving component is in driving connection with the outer sleeve and can drive the outer sleeve to move axially, which is used to release the patch loaded in the sleeve component; the second driving component is in driving connection with the sliding shaft member and can drive the sliding shaft member to move axially, which is used to drive the deployment arm to expand.

4. The surgical instrument for minimally-invasive delivery of a tissue repair patch of claim 3, wherein, The first driving component is a button slidably arranged on the shell, which is fixed with the outer wall of the outer sleeve through a sliding seat; the second driving component is a trigger slidably arranged on the shell, which is connected with the sliding shaft member through a power pull rope.

5. The surgical instrument for minimally-invasive delivery of a tissue repair patch of claim 3, wherein, The shell is provided with a safety member for locking the second driving component in the initial state.

6. The surgical instrument for minimally invasive delivery of a tissue repair patch of claim 4, wherein, The connecting component includes a connecting head and a connecting pipe; one end of the connecting head is fixed with the deployment component and the sleeve component, and the other end is detachably fixed with the connecting pipe; the connecting pipe is fixed in the shell.

7. The surgical instrument for minimally-invasive delivery of a tissue repair patch of claim 6, wherein, The connecting pipe is provided with a detachable power rope connecting buckle, one connecting end of which is connected with the power rope, and the other connecting end is connected with a transmission rope arranged in the connecting pipe; the machine shell is further provided with a trigger connecting buckle, the top end of which is connected with the other end of the transmission rope through an avoiding hole on the connecting pipe, and the bottom end of the trigger connecting buckle is fixed with the trigger.

8. The surgical instrument for minimally-invasive delivery of a tissue repair patch of claim 7, wherein, The machine shell is provided with three notches for locking the button, which correspond to three positions of the button, i.e. a state of restricting the implanted patch to the contracted state of the outer wall of the inner sleeve, a release state of releasing the to-be-implanted patch, and a state of further withdrawing the outer sleeve to expose the power rope connecting buckle when replacing the delivery part.

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