Surgical opening device

Abstract

The present application relates to the field of medical devices, and in particular to a surgical hole opening device, comprising a mounting tube, a gripping mechanism and a cylindrical knife; the gripping mechanism comprises a linkage shaft, a guide head and an expandable member, the linkage shaft is passed through the mounting tube and can slide in the axial direction of the mounting tube, the guide head is located outside the mounting tube and is installed at one end of the linkage shaft, the guide head can slide along the axial direction of the mounting tube with the linkage shaft and approach or move away from the mounting tube, the expandable member is located between the mounting tube and the guide head, wherein the guide head can push the expandable member when sliding in the direction close to the mounting tube and expand the expandable member toward the circumferential side; one end of the cylindrical knife is provided with a blade for cutting tissue, the cylindrical knife sleeve is provided on the mounting tube, and the end of the cylindrical knife provided with the blade is close to the guide head. The surgical hole opening device can ensure that the incision is neat and the excised tissue can be completely removed.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to a surgical opening device. Background Art

[0002] In surgical operations, it is often necessary to make holes in soft tissues (including heart tissue). For example, when a ventricular assist device is implanted in a human body, a hole needs to be made at the apex of the heart. The quality of the hole is the key to the success of the implantation operation. A surgical hole-making device that can ensure a neat incision and complete removal of the excised tissue is the basis for high-quality hole-making. Therefore, it is urgent to provide a surgical hole-making device that can ensure a neat incision and complete removal of the excised tissue. Summary of the invention

[0003] The purpose of the present application is to provide a surgical opening device that can ensure a neat incision and complete removal of excised tissue.

[0004] This application is implemented as follows:

[0005] A surgical opening device, comprising:

[0006] Install the barrel;

[0007] The gripping mechanism comprises a linkage shaft, a guide head and an expandable member, wherein the linkage shaft is passed through the mounting tube and can slide in the axial direction of the mounting tube, the guide head is located outside the mounting tube and is installed at one end of the linkage shaft, the guide head can slide along the axial direction of the mounting tube with the linkage shaft and approach or move away from the mounting tube, the expandable member is located between the mounting tube and the guide head, wherein the guide head can push the expandable member when sliding in the direction close to the mounting tube, and make the expandable member expand toward the circumferential side;

[0008] A cylindrical knife has a blade for cutting tissue at one end, the cylindrical knife sleeve is arranged on the mounting cylinder, and one end of the cylindrical knife provided with the blade is close to the guide head.

[0009] Optionally, the gripping mechanism further comprises a positioning structure, the positioning structure being connected to the shaft end of the linkage shaft away from the guide head, the positioning structure being able to move in the axial direction of the mounting cylinder, and the positioning structure being able to drive the linkage shaft to slide;

[0010] A first abutting top portion and a second abutting top portion are provided at one end of the mounting tube away from the guide head, and in the axial direction of the mounting tube, the first abutting top portion is closer to the guide head than the second abutting top portion;

[0011] Wherein, the positioning structure selectively abuts against one of the first abutment top and the second abutment top. When the positioning structure abuts against the first abutment top, the expandable component is in a non-expanded state. When the positioning structure abuts against the second abutment top, the expandable component maintains an expanded state.

[0012] Optionally, the positioning structure includes a connecting shaft connected to the linkage shaft and a positioning strip connected to the connecting shaft and extending in an axial direction perpendicular to the mounting tube, the positioning strip selectively abuts against one of the first abutment top and the second abutment top, when the positioning strip abuts against the first abutment top, the expandable component is in a non-expanded state, and when the positioning strip abuts against the second abutment top, the expandable component maintains an expanded state.

[0013] Optionally, the first abutment top and the second abutment top are arranged along the tube end of the mounting tube away from the guide head, the positioning structure can rotate relative to the mounting tube, and the positioning structure is rotatably connected to the linkage shaft, so that the linkage shaft is stationary relative to the mounting tube during the rotation of the positioning structure relative to the mounting tube, and the positioning structure can abut against one of the first abutment top and the second abutment top by sliding the positioning mechanism in the axial direction of the mounting tube and rotating the positioning structure relative to the mounting tube.

[0014] Optionally, a plug is provided at the end of the mounting tube close to the guide head, and the plug is provided with an axial hole;

[0015] The inner wall surface of the installation cylinder is provided with a limiting protrusion;

[0016] The linkage shaft comprises a first shaft segment, a second shaft segment and a third shaft segment connected in sequence, the first shaft segment and the second shaft segment are accommodated in the mounting cylinder, the third shaft segment is passed through the shaft hole, and the second shaft segment is located between the limiting protrusion and the plug;

[0017] The guide head is fixedly connected to one end of the third shaft segment away from the second shaft segment, and the gripping mechanism further comprises an elastic reset member, one end of which elastically abuts against the limiting protrusion, and the other end of which elastically abuts against the second shaft segment.

[0018] Optionally, the shape of the shaft hole is non-circular, and the cross-sectional shape of the third shaft segment matches the shape of the shaft hole;

[0019] And / or, the gripping mechanism further comprises an elastic sealing ring accommodated in the mounting tube, the elastic sealing ring being sleeved on the second shaft segment, the inner ring surface of the elastic sealing ring elastically abutting against the second shaft segment, and the outer ring surface elastically abutting against the inner tube wall surface of the mounting tube, so as to seal the gap between the second shaft segment and the inner tube wall surface of the mounting tube;

[0020] And / or, the shaft diameter of the second shaft segment is larger than the shaft diameter of the first shaft segment, and the end of the elastic return member away from the limiting protrusion elastically abuts against the end face of the second shaft segment close to the first shaft segment.

[0021] Optionally, a clamping groove is formed on one end of the cylindrical knife away from the blade, and the clamping groove comprises an introduction groove section extending from the barrel of the cylindrical knife away from the blade toward the blade, and a clamping groove portion extending and bending from one end of the introduction groove section close to the blade and communicating with the introduction groove section;

[0022] The mounting tube is provided with a snap-fitting protrusion, which can slide from the introduction groove section into the snap-fitting groove portion, and the snap-fitting protrusion can abut against the groove wall of the snap-fitting groove portion to prevent the cylindrical knife from moving toward the direction close to the guide head;

[0023] The mounting cylinder includes a cylinder body with openings at both ends and an extension portion extending outward from one end of the cylinder body, wherein the outer diameter of the extension portion gradually decreases from the end close to the cylinder body to the end away from the cylinder body; the inner diameter of the cylindrical knife close to the blade is smaller than the outer diameter of the extension portion close to the end of the cylinder body, so that the end of the extension portion close to the cylinder body can prevent the cylindrical knife from moving in a direction away from the guide head.

[0024] Optionally, the engaging groove portion includes a first engaging groove section that is connected to the end of the introduction groove section near the blade and extends circumferentially, and a second engaging groove section that is connected to the first engaging groove section and extends in a direction away from the blade, and the engaging protrusion can abut against the groove wall of the second engaging groove section to prevent the cylindrical knife from moving toward the guide head.

[0025] Optionally, the expandable component includes a plurality of spring sheets, both ends of each of which are respectively fixed to the guide head and the mounting tube, and the plurality of spring sheets are arranged around the linkage shaft. When the expandable component is in an unexpanded state, the spring sheets are curved, and the concave surface of the spring sheets faces the linkage shaft.

[0026] Optionally, the maximum outer diameter of the expandable member after expansion is smaller than the inner diameter of the cutting edge of the cylindrical knife.

[0027] The technical effect of the present invention is that before the cylindrical knife cuts the soft tissue, the soft tissue to be cut can be grasped on the mounting cylinder through the grasping mechanism. In this way, during the process of the cylindrical knife cutting the soft tissue, the incision of the soft tissue can be ensured to be neat and the quality of the incision can be ensured. After the soft tissue to be cut is removed, it is still blocked in the cylindrical knife and can be removed from the human body together with the surgical opening device, so it will not remain in the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 is a three-dimensional structural diagram of a surgical opening device provided in an embodiment of the present application, wherein the expandable member is not yet in an expanded state;

[0030] Figure 2 is a front view of a surgical opening device provided by an embodiment of the present application, wherein the expandable member is not yet in an expanded state;

[0031] Figure 3 yes Figure 2 Sectional view in the AA direction;

[0032] Figure 4 This is an exploded view of the surgical opening device provided in an embodiment of the present application from one perspective;

[0033] Figure 5 is an exploded view of the surgical opening device provided in an embodiment of the present application from another perspective;

[0034] Figure 6 is a front view of a surgical opening device provided by an embodiment of the present application, wherein the expandable member is in an expanded state;

[0035] Figure 7 is a three-dimensional structural diagram of an installation cylinder in a surgical opening device provided in an embodiment of the present application;

[0036] Figure 8 is a three-dimensional structural diagram of a plug in a surgical opening device provided in an embodiment of the present application;

[0037] Fig. 9 is a three-dimensional structural diagram of a cylindrical knife in a surgical opening device provided in an embodiment of the present application;

[0038] Fig.10 It is a three-dimensional structural diagram of the spring piece in the surgical opening device provided in an embodiment of the present application.

[0039] Description of Figure Numbers:

[0040] Label name Label name 100 Installation barrel 101 Semi-cylindrical valve 110 Plug 1101 Shaft hole 121 First reach the top 122 Second to the top 130 Limiting protrusion 140 Snap-fit ​​protrusion 150 Barrel body 160 Extension 200 Gripping mechanism 210 Linkage axis 211 First shaft section 212 Second shaft section 21201 Annular limit groove 213 The third shaft section 220 Guide head 230 Expandable parts 231 shrapnel 240 Positioning structure 241 Connecting shaft 242 Positioning bar 250 Elastic return element 260 Elastic sealing ring 270 handle 300 Cylindrical knife 310 Anti-slip structure 301 Blade 302 Card slot 3021 Import slot segment 3022 Snap-in groove 30221 First engaging groove section 30222 Second engaging groove section DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] An embodiment of the present application provides a surgical opening device.

[0043] See also Figures 1 to 5 The surgical opening device includes a mounting tube 100, a gripping mechanism 200 and a cylindrical knife 300.

[0044] The mounting tube 100 serves as a structural support of the entire surgical opening device, is cylindrical in shape as a whole, and is used to mount other related components of the surgical opening device; it should be noted here that the mounting tube 100 can be cylindrical, square, cylindrical with a polygonal cross-section, or cylindrical with an irregular structure, etc.

[0045] The gripping mechanism 200 includes a linkage shaft 210, a guide head 220, and an expandable member 230. The linkage shaft 210 is disposed through the mounting tube 100 and can slide in the axial direction of the mounting tube 100. The guide head 220 is located outside the mounting tube 100 and is installed at one end of the linkage shaft 210. The guide head 220 can slide along the axial direction of the mounting tube 100 with the linkage shaft 210 and approach or move away from the mounting tube 100. The expandable member 230 is located between the mounting tube 100 and the guide head 220, wherein the guide head 220 can push the expandable member 230 when sliding in the direction close to the mounting tube 100, and make the expandable member 230 expand toward the circumferential side. Specifically, by applying force to one end of the linkage shaft 210 away from the guide head 220, the linkage shaft 210 can slide in the axial direction of the mounting tube 100 and drive the guide head 220 to move in the axial direction of the mounting tube 100.

[0046] The cylindrical knife 300 is sleeved on the installation cylinder 100. One end of the cylindrical knife 300 is provided with a blade 301 for cutting tissue, and the end of the cylindrical knife 300 provided with the blade 301 is close to the guide head 220. The cylindrical knife 300 is installed in a detachable manner, for example, by a clamping manner, a pin manner, etc. Wherein, when the cylindrical knife 300 is separated from the fixed relationship with the installation cylinder 100, the cylindrical knife 300 can slide and rotate in the axial direction of the installation cylinder 100, so that the cylindrical knife 300 can perform cutting work. That is, the cylindrical knife 300 is installed on the installation cylinder 100 under normal conditions, and when the cylindrical knife 300 needs to be used, the cylindrical knife 300 and the installation cylinder 100 can be in a state of non-fixed connection, for example, the cylindrical knife 300 can rotate relative to the installation cylinder 100 and / or slide in the axial direction of the installation cylinder 100, so that the cylindrical knife 300 can perform cutting work.

[0047] The surgical perforation device of the present application is used to perforate human organs. Specifically, it is used to perforate human soft tissue (including heart tissue) to facilitate subsequent intubation, installation of auxiliary devices (such as ventricular assist pumps), and other operations. Because human soft tissue is relatively soft, it is very easy to deform due to unstable clamping. At the same time, the corresponding cut soft tissue also needs to be clamped to prevent it from falling and remaining in the human body.

[0048] Based on the structural design of the surgical opening device of the present application, during use, first, a cross incision is cut on the soft tissue using a common cutting tool in the prior art; second, the staff holds the surgical opening device by holding the mounting tube 100, and passes the guide head 220 through the cross incision until the expandable member 230 also passes through the cross incision; third, the staff applies a force in the direction away from the expandable member 230 to the end of the linkage shaft 210 away from the guide head 220. At this time, the linkage shaft 210 will drive the guide head 220 to approach the mounting tube 100 to push the expandable member 230 and expand the expandable member 230 toward the circumferential side (the surgical opening device after the expandable member 230 is expanded is as shown in FIG. Figure 6As shown), the expandable member 230 in the expanded state supports the soft tissue to be cut. Fourth, the cylindrical knife 300 is moved along the mounting tube 100 toward the soft tissue, and then the cylindrical knife 300 is rotated to cut the soft tissue to be cut. Since the soft tissue to be cut is grasped by the expandable member 230 and the mounting tube 100, that is, the expandable member 230 and the mounting tube 100 can jointly position the soft tissue to be cut, and the soft tissue to be cut and the mounting tube 100 are relatively fixed, then, during the process of the cylindrical knife 300 cutting the soft tissue, the cutting position of the cylindrical knife 300 is fixed, thereby ensuring that the incision of the soft tissue is neat and the quality of the incision is ensured. Finally, after the soft tissue is cut, it is blocked in the cylindrical knife 300 by the expandable member 230. The expandable member 230 blocks the cut tissue. At this time, the surgical opening device is removed from the human body, and the cut soft tissue can be removed from the human body together with the surgical opening device, so that it will not remain in the human body.

[0049] As can be seen from the above, the technical effect of the present invention is: before the cylindrical knife 300 cuts the soft tissue, the soft tissue to be cut can be grasped on the mounting cylinder 100 through the grasping mechanism 200, so that in the process of the cylindrical knife 300 cutting the soft tissue, the incision of the soft tissue can be ensured to be neat and the quality of the incision can be ensured, and after the soft tissue to be cut is removed, it is still blocked in the cylindrical knife 300 and can be removed from the human body together with the surgical opening device, so that it will not remain in the human body.

[0050] In this embodiment, the installation cylinder 100 can be formed by splicing two half-cylinder petals 101. In this way, firstly, it is helpful to reduce the difficulty of producing and manufacturing the installation cylinder 100. Secondly, during the assembly process, the remaining components can be first assembled to one half of the cylinder petals 101, and then the two half-cylinder petals 101 can be spliced. Among them, both half-cylinder petals 101 are provided with positioning grooves, and positioning pins are used to position and cooperate with the positioning grooves of the two half-cylinder petals 101, and are sealed and fixed by welding; it can be understood that in other embodiments, one half of the cylinder petal 101 has a positioning groove, and the other half of the cylinder petal 101 is provided with a positioning column.

[0051] In this embodiment, the outer wall of the cylindrical knife 300 is provided with an anti-skid structure 310 to prevent the staff from slipping when operating the cylindrical knife 300 to rotate relative to the mounting cylinder 100.

[0052] During the use of the surgical opening device, if there is no other structure to restrict the linkage shaft 210, then in order to ensure that the grasping mechanism 200 grasps the soft tissue on the mounting tube 100, the staff is required to manually maintain the position of the linkage shaft 210 so that the expandable part 230 expands toward the circumferential side, which causes great inconvenience to the staff's work.

[0053] To this end, in one embodiment, see Figures 1 to 7The gripping mechanism 200 further includes a positioning structure 240. The positioning structure 240 is connected to the axial end of the linkage shaft 210 away from the guide head 220. The positioning structure 240 can move in the axial direction of the mounting tube 100, and the positioning structure 240 can drive the linkage shaft 210 to slide. The end of the mounting tube 100 away from the guide head 220 is provided with a first abutting top portion 121 and a second abutting top portion 122. In the axial direction of the mounting tube 100, the first abutting top portion 121 is closer to the guide head 220 than the second abutting top portion 122. The positioning structure 240 selectively abuts against one of the first abutting top portion 121 and the second abutting top portion 122. When the positioning structure 240 abuts against the first abutting top portion 121, the expandable member 230 is in a non-expanded state. When the positioning structure 240 abuts against the second abutting top portion 122, the expandable member 230 maintains an expanded state (such as Figure 6 shown).

[0054] Then, in the process of making the guide head 220 pass through the cross incision, when the positioning structure 240 abuts against the first abutment portion 121, the expandable member 230 is in a non-expanded state, that is, the expandable member 230 has not yet expanded toward the circumferential side; after the expandable member 230 passes through the cross incision, the staff will apply a force to the linkage shaft 210 in the direction away from the guide head 220, and the linkage shaft 210 will drive the guide head 220 toward the mounting tube 100 to push the expandable member 230 and expand the expandable member 230 toward the circumferential side until the positioning structure 240 abuts against the second abutment portion 122, and the expandable member 230 maintains the expanded state. Specifically, the positioning structure 240 maintains the expandable member 230 in a state of expansion toward the circumferential side through the linkage shaft 210.

[0055] The technical effect of this structure is: by selectively abutting the first abutment portion 121 and the second abutment portion 122 through the positioning structure 240, the expandable component 230 can be maintained in an expanded state without the need for the staff to manually maintain the position of the linkage shaft 210, which greatly facilitates the staff. In addition, by setting the first abutment portion 121 and the second abutment portion 122, the shape of the expandable component 230 in the required non-expanded state and in the expanded state is determined, thereby improving the safety of the operation.

[0056] In one embodiment, the first abutment top portion 121 and the second abutment top portion 122 are arranged along the tube end of the mounting tube 100 away from the guide head 220, the positioning structure 240 can rotate relative to the mounting tube 100, and the positioning structure 240 is rotatably connected to the linkage shaft 210, so that the linkage shaft 210 is stationary relative to the mounting tube 100 during the rotation of the positioning structure 240 relative to the mounting tube 100. The positioning structure 240 can abut against one of the first abutment top portion 121 and the second abutment top portion 122 by sliding the positioning mechanism in the axial direction of the mounting tube 100 and rotating the positioning structure 240 relative to the mounting tube 100. The structure is relatively simple, easy to manufacture, and reduces the manufacturing cost.

[0057] Specifically, the first abutting portion 121 is a partial end surface of one end of the mounting tube 100 away from the guide head 220, and the second abutting portion 122 is a protruding end surface extending from the end surface of the mounting tube 100 away from the guide head 220 along the axial direction of the mounting tube 100 in a direction away from the mounting tube 100. In this embodiment, both the first abutting portion 121 and the second abutting portion 122 are planar, but the present invention is not limited thereto, and the first abutting portion 121 and the second abutting portion 122 may also be wavy, sawtooth, grooved, etc.

[0058] In one embodiment, the positioning structure 240 includes a connecting shaft 241 connected to the linkage shaft 210 and a positioning strip 242 connected to the connecting shaft 241 and extending in an axial direction perpendicular to the mounting tube 100. The positioning strip 242 selectively abuts against one of the first abutting top portion 121 and the second abutting top portion 122. When the positioning strip 242 abuts against the first abutting top portion 121, the expandable member 230 is in a non-expanded state. When the positioning strip 242 abuts against the second abutting top portion 122, the expandable member 230 maintains an expanded state. Specifically, the connecting shaft 241 is rotatably connected to the linkage shaft 210.

[0059] It should be noted here that the shape of the positioning bar 242 is not limited, and the structural shape can be a flat or vertical plate-like structure, or a rod-like structure, a columnar structure, etc., wherein the positioning structure 240 is connected to the shaft 241 and the positioning bar 242, and the irregular structure of the positioning structure 240 is split into regular structural parts, which is convenient for separate production and manufacturing, thereby reducing the production cost.

[0060] In this embodiment, two first abutment top portions 121 and two second abutment top portions 122 are provided, and the first abutment top portions 121 and the second abutment top portions 122 are alternately arranged along the tube end of the mounting tube 100. When the expandable member 230 is in a non-expanded state, the positioning strip 242 abuts against the two first abutment top portions 121. When the expandable member 230 is in an expanded state, the positioning strip 242 abuts against the two second abutment top portions 122.

[0061] It should be noted that the number of the first abutting top portion 121 and the second abutting top portion 122 is not limited to two. The number of the first abutting top portion 121 and the second abutting top portion 122 can also be one, greater than two, etc., as long as the force balance of the positioning structure 240 can be maintained.

[0062] It should be noted that the single second abutment portion 122 can be divided into two parts, one part is provided on one half of the cylinder petal 101 , and the other part is provided on the other half of the cylinder petal 101 .

[0063] In this embodiment, a handle 270 is provided at one end of the positioning structure 240 away from the linkage shaft 210, so that the staff can pull and rotate the positioning structure 240 through the handle 270; specifically, combined with the aforementioned structure, the handle 270 is fixedly connected to one end of the connecting shaft 241 away from the linkage shaft 210.

[0064] Furthermore, a plug 110 is provided at the end of the mounting cylinder 100 near the guide head 220, and the plug 110 is provided with an axial hole 1101 for the linkage shaft 210 to pass through. A limiting protrusion 130 is convexly provided on the inner cylinder wall of the mounting cylinder 100. The linkage shaft 210 includes a first shaft section 211, a second shaft section 212 and a third shaft section 213 connected in sequence, the first shaft section 211 and the second shaft section 212 are accommodated in the mounting cylinder 100, the third shaft section 213 is penetrated in the axial hole 1101, and the second shaft section 212 is located between the limiting protrusion 130 and the plug 110; the guide head 220 is fixed to one end of the third shaft section 213 away from the second shaft section 212; the gripping mechanism 200 also includes an elastic reset member 250, one end of which is elastically abutted against the limiting protrusion 130, and the other end of which is elastically abutted against the second shaft section 212.

[0065] The technical effect of this structure is: through the cooperation of the limiting protrusion 130, the second shaft section 212 and the elastic reset member 250, when the positioning structure 240 switches from a position relative to the first abutment top portion 121 to a position relative to the second abutment top portion 122, the linkage shaft 210 will be reset under the action of the elastic reset member 250. At the same time, under the action of the above-mentioned elastic reset member 250, the expandable member 230 of the grasping mechanism 200 can maintain the final expanded state and non-expanded state by itself without applying external force and other operations.

[0066] In this embodiment, the first shaft segment 211 and the second shaft segment 212 are detachably connected, specifically, they can be connected by a screw connection structure; the second shaft segment 212 and the third shaft segment 213 are fixedly connected, specifically, the second shaft segment 212 and the third shaft segment 213 are an integrally formed structure.

[0067] In this embodiment, the elastic return member 250 is a spring, and the elastic return member 250 is sleeved on the first shaft section 211. One end of the first shaft section 211 away from the second shaft section 212 is rotatably connected to the connecting shaft 241.

[0068] In one embodiment, see Figure 8 The shape of the shaft hole 1101 is non-circular, and the cross-sectional shape of the third shaft segment 213 matches the shape of the shaft hole 1101, thereby preventing the third shaft segment 213 from rotating. If the third shaft segment 213 rotates during the operation, the expandable member 230 and the guide head 220 located in the soft tissue are likely to cause damage to the soft tissue.

[0069] It should be noted that, in the present embodiment, the shaft hole 1101 is a waist-shaped hole, and the shape of the shaft hole 1101 is not limited to a square hole, and can also be a square hole, a rectangular hole, etc.

[0070] In one embodiment, see Figures 3 to 5 The gripping mechanism 200 also includes an elastic sealing ring 260 accommodated in the mounting tube 100. The elastic sealing ring 260 is sleeved on the second shaft segment 212. The inner ring surface of the elastic sealing ring 260 elastically contacts the second shaft segment 212, and the outer ring surface elastically contacts the inner tube wall of the mounting tube 100 to seal the gap between the second shaft segment 212 and the inner tube wall of the mounting tube 100.

[0071] It should be noted that the elastic sealing ring 260 is used to prevent liquid from entering the installation tube 100 from the tube end of the installation tube 100 close to the plug 110. The structural shape of the elastic sealing ring 260 can be in various shapes, such as a circular cross-sectional shape, an X-shaped cross-sectional shape, etc., as long as it can play a sealing role.

[0072] Furthermore, an annular limiting groove 21201 is provided on the circumferential side of the second shaft segment 212 , and the elastic sealing ring 260 is at least partially accommodated in the annular limiting groove 21201 . By restricting the elastic sealing ring 260 in the annular limiting groove 21201 , relative movement between the elastic sealing ring 260 and the second shaft segment 212 is avoided.

[0073] In one embodiment, the shaft diameter of the second shaft segment 212 is larger than the shaft diameter of the first shaft segment 211 , and the end of the elastic return member 250 away from the limiting protrusion 130 elastically abuts against the end surface of the second shaft segment 212 close to the first shaft segment 211 .

[0074] In one embodiment, see Fig. 9 The detachable installation of the cylindrical knife 300 is specifically achieved by the following method:

[0075] The cylindrical knife 300 is provided with a snap-fit ​​groove 302, which includes an introduction groove section 3021 extending from the barrel of the cylindrical knife 300 away from the blade 301 toward the blade 301, and a snap-fit ​​groove portion 3022 extending from one end of the introduction groove section 3021 close to the blade 301 and connected to the introduction groove section 3021.

[0076] The mounting cylinder 100 is provided with a snap-fit ​​protrusion 140, which can slide from the introduction groove section 3021 into the snap-fit ​​groove portion 3022, and the snap-fit ​​protrusion 140 can abut against the groove wall of the snap-fit ​​groove portion 3022 to prevent the cylindrical knife 300 from moving toward the direction close to the guide head 210;

[0077] The mounting cylinder 100 includes a cylinder body 150 with openings at both ends and an extension portion 160 extending outward from one end of the cylinder body 150, wherein the outer diameter of the extension portion 160 gradually decreases from the end close to the cylinder body 150 to the end away from the cylinder body 150; the inner diameter of the cylindrical knife 300 close to the blade 301 is smaller than the outer diameter of the end of the extension portion 160 close to the cylinder body 150, so that the end of the extension portion 160 close to the cylinder body 150 can prevent the cylindrical knife 300 from moving in a direction away from the guide head 220.

[0078] That is, the engaging protrusion 140 abuts against the groove wall of the engaging groove 3022 to prevent the cylindrical knife 300 from moving toward the guide head 210, and the extension portion 160 prevents the cylindrical knife 300 from moving away from the guide head 220, thereby achieving the installation of the cylindrical knife 300 and preventing the cylindrical knife 300 from detaching from the mounting cylinder 100 when in the installed state.

[0079] Furthermore, the engaging groove portion 3022 includes a first engaging groove section 30221 which is connected to the end of the introduction groove section 3021 close to the blade 301 and extends circumferentially, and a second engaging groove section 30222 which is connected to the first engaging groove section 30221 and extends in a direction away from the blade 301. The engaging protrusion 140 can abut against the groove wall of the second engaging groove section 30222 to prevent the cylindrical knife 300 from moving toward the direction close to the guide head 210. In actual use, it is easy to cause the cylindrical knife 300 and the mounting cylinder 100 to rotate relative to each other by mistake. Based on this structural design, when the engaging protrusion 140 abuts against the groove wall of the second engaging groove section 30222, if the engaging protrusion 140 needs to be withdrawn from the engaging groove 302, it is necessary to first move the engaging protrusion 140 toward the blade 301 and then rotate it relative to the cylindrical knife 300. In this way, the misoperation that causes the cylindrical knife 300 to separate from the mounting cylinder 100 can be avoided. Secondly, in actual use, before releasing the fixed installation of the cylindrical knife 300 and the mounting cylinder 100, this structure can also realize indirect holding of the mounting cylinder 100 by holding the cylindrical knife 300.

[0080] It should be noted that the extension path of the first engaging groove section 30221 can be a straight line, a curve, etc. In order to reduce the difficulty of processing and reduce the production cost, the first engaging groove section 30221 is also preferably a straight line.

[0081] In the present embodiment, two pairs of engaging protrusions 140 and engaging grooves 302 are provided. It can be understood that the number of the engaging protrusions 140 and engaging grooves 302 provided can be set as required.

[0082] It should be noted that the detachable installation of the cylindrical knife 300 is not limited to the above-mentioned method. In another embodiment, the mounting cylinder 100 is provided with a clamping protrusion 140 that can be clamped with the clamping groove 302. The clamping protrusion 140 is clamped with the clamping groove 302 to mount the cylindrical knife 300 on the mounting cylinder 100, that is, the cylindrical knife 300 is mounted on the mounting cylinder 100 directly through the clamping protrusion 140 and the clamping groove 302, without adopting the above-mentioned method of limiting the movement of the cylindrical knife 300 up and down. At this time, before the cylindrical knife 300 cuts the soft tissue, the clamping protrusion 140 is clamped with the clamping groove 302 to limit the relative movement of the cylindrical knife 300 and the mounting cylinder 100, so that the cylindrical knife 300 can be prevented from sliding toward the soft tissue during the process of passing the guide head 220 through the cross incision; when it is necessary to cut the soft tissue, the clamping protrusion 140 is disengaged from the clamping groove 302 to achieve the cutting operation.

[0083] In one embodiment, the maximum outer diameter of the expandable member 230 after expansion is smaller than the inner diameter of the blade 301 of the cylindrical knife 300, so that the expandable member 230 after expansion can be at least partially accommodated in the cylindrical knife 300, which can not only ensure that the soft tissue incision is neat, but also the cut tissue will be blocked in the cylindrical knife 300 by the expandable member 230 after expansion, further ensuring that the cut tissue can be completely removed. If the maximum outer diameter of the expandable member 230 after expansion is larger than the inner diameter of the blade 301 of the cylindrical knife 300, the cylindrical knife 300 will contact the expandable member 230 when cutting tissue, which is likely to cause an uneven soft tissue incision.

[0084] In one embodiment, the end of the guide head 220 away from the linkage shaft 210 is arranged in a cone shape. In this way, when the guide head 220 is inserted into the heart through the cross incision, the cone tip of the guide head 220 can play a certain guiding role.

[0085] In one embodiment, see Figures 1 to 6 The expandable member 230 includes a plurality of spring pieces 231, and the two ends of each spring piece 231 are respectively fixed to the guide head 220 and the mounting tube 100, and the plurality of spring pieces 231 are arranged around the linkage shaft 210. The structure is simple, easy to implement, and conducive to reducing production costs. The structure is also easy to maintain, thereby reducing subsequent maintenance costs.

[0086] During use, that is, when each spring piece 231 is pushed by the guide head 220 , the middle area of ​​each spring piece 231 bends and bulges in a direction away from the linkage shaft 210 .

[0087] For further information, see Fig.10 When the expandable member 230 is in an unexpanded state, the spring piece 231 is curved, and the concave surface of the spring piece 231 faces the linkage shaft 210. In this way, during use, that is, when each spring piece 231 is pushed by the guide head 220, the structure of the spring piece 231 limits the deformation direction of the spring piece 231, that is, the spring piece 231 can only expand in the direction away from the linkage shaft 210 when being pushed.

[0088] In combination with the above structure, in this embodiment, two ends of each elastic piece 231 are fixedly connected to the guide head 220 and the plug 110 respectively.

[0089] It should be noted that the spring piece 231 can be made of metal material, such as stainless steel, or can be made of plastic material.

[0090] It should also be noted that the expandable member 230 is not limited to the above structure, but may also be a cylindrical airbag structure (similar to a balloon). The airbag structure has a bag skin that stores gas and is made of elastic material. The airbag structure expands circumferentially when pushed.

[0091] The specific operation of the above surgical opening device is as follows:

[0092] First, a cross incision is made on one side of the soft tissue using a common cutting piece in the prior art, and the cross incision passes through to the other side of the soft tissue, and the soft tissue will not be peeled off during the cross incision process;

[0093] Second, the staff directly holds the installation tube 100, the positioning structure 240 or the handle 270 to hold the surgical opening device, so that the guide head 220 passes through the cross incision, and the expandable member 230 also passes through the cross incision. At this time, the positioning structure 240 is at a position opposite to the first abutment portion 121 and can abut against the tube end of the installation tube 100 away from the plug 110;

[0094] Third, the staff fixes the installation tube 100, and indirectly applies a force to the linkage shaft 210 in a direction away from the expandable member 230 through the positioning structure 240 or the handle 270, and the positioning structure 240 and the installation tube 100 are spaced apart. At this time, the linkage shaft 210 drives the guide head 220 to approach the installation tube 100, and pushes the expandable member 230, and makes the middle area of ​​each spring piece 231 bulge in a direction away from the linkage shaft 210. The expandable member 230 in the expanded state pushes the soft tissue to be cut against the installation tube 100, and grasps the soft tissue to be cut together with the installation tube 100.

[0095] Fourth, the staff continues to fix the installation tube 100, and continues to apply a force to maintain the distance between the positioning structure 240 and the installation tube 100, and then applies a force to rotate the positioning structure 240 relative to the installation tube 100, so that the positioning structure 240 corresponds to the position of the second abutting portion 122;

[0096] Fifth, the force maintaining the distance between the positioning structure 240 and the mounting tube 100 is cancelled. At this time, under the action of the elastic reset member 250, the positioning structure 240 is abutted against the second abutting portion 122, and the staff does not need to manually maintain the position of the linkage shaft 210;

[0097] Sixth, the engaging protrusion 140 is slid relative to the cylindrical knife 300 from the second engaging groove section 30222 and the first engaging groove section 30221 to the introduction groove section 3021 to release the engaging relationship between the engaging groove 302 and the engaging protrusion 140;

[0098] Seventh, the cylindrical knife 300 is moved toward the soft tissue along the mounting tube 100, and then the cylindrical knife 300 is rotated to cut the soft tissue to be cut, wherein, since the soft tissue to be cut is grasped by the expandable member 230 in the expanded state and the mounting tube 100, that is, the expandable member 230 in the expanded state and the mounting tube 100 can jointly position the soft tissue to be cut, and the soft tissue to be cut and the mounting tube 100 are relatively fixed, then, during the process of the cylindrical knife 300 cutting the soft tissue, the cutting position of the cylindrical knife 300 is fixed, thereby ensuring that the incision of the soft tissue is neat and the incision quality is guaranteed;

[0099] Eighth, the surgical opening device is removed from the human body, and the cut soft tissue can be removed from the human body together with the surgical opening device, so it will not remain in the human body.

[0100] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A surgical opening device, characterized in that: include, Mounting cylinder (100); The gripping mechanism (200) comprises a linkage shaft (210), a guide head (220) and an expandable member (230), wherein the linkage shaft (210) is passed through the installation tube (100) and can slide in the axial direction of the installation tube (100), the guide head (220) is located outside the installation tube (100) and is installed at one end of the linkage shaft (210), the guide head (220) can slide along the axial direction of the installation tube (100) with the linkage shaft (210) and approach or move away from the installation tube (100), and the expandable member (230) is located between the installation tube (100) and the guide head (220), wherein when the guide head (220) slides in the direction approaching the installation tube (100), it can push the expandable member (230) and make the expandable member (230) expand toward the circumferential side; A cylindrical knife (300), one end of which is provided with a blade (301) for cutting tissue, the cylindrical knife (300) is sleeved on the mounting cylinder (100), and one end of the cylindrical knife (300) provided with the blade (301) is close to the guide head (220); The gripping mechanism (200) further comprises a positioning structure (240), wherein the positioning structure (240) is connected to the shaft end of the linkage shaft (210) away from the guide head (220), the positioning structure (240) is capable of moving in the axial direction of the mounting cylinder (100), and the positioning structure (240) is capable of driving the linkage shaft (210) to slide; A first abutment top portion (121) and a second abutment top portion (122) are provided at one end of the installation tube (100) away from the guide head (220); in the axial direction of the installation tube (100), the first abutment top portion (121) is closer to the guide head (220) than the second abutment top portion (122); The positioning structure (240) selectively abuts against one of the first abutting top portion (121) and the second abutting top portion (122); when the positioning structure (240) abuts against the first abutting top portion (121), the expandable member (230) is in a non-expanded state; and when the positioning structure (240) abuts against the second abutting top portion (122), the expandable member (230) maintains an expanded state. The maximum outer diameter of the expandable member (230) after expansion is smaller than the inner diameter of the blade (301) of the cylindrical knife; The cylindrical knife (300) can slide and rotate in the axial direction of the mounting cylinder (100), so that the cylindrical knife (300) can perform cutting work.

2. The surgical opening device according to claim 1, characterized in that: The positioning structure (240) includes a connecting shaft (241) connected to the linkage shaft (210) and a positioning strip (242) connected to the connecting shaft (241) and extending in an axial direction perpendicular to the mounting tube (100). The positioning strip (242) selectively abuts against one of the first abutment top portion (121) and the second abutment top portion (122). When the positioning strip (242) abuts against the first abutment top portion (121), the expandable member (230) is in a non-expanded state. When the positioning strip (242) abuts against the second abutment top portion (122), the expandable member (230) maintains an expanded state.

3. The surgical opening device according to claim 1, characterized in that: The first abutment top portion (121) and the second abutment top portion (122) are arranged along the end of the mounting tube (100) away from the guide head (220); the positioning structure (240) can rotate relative to the mounting tube (100), and the positioning structure (240) is rotationally connected to the linkage shaft (210) so that the linkage shaft (210) is stationary relative to the mounting tube (100) during the rotation of the positioning structure (240) relative to the mounting tube (100); the positioning structure (240) can abut against one of the first abutment top portion (121) and the second abutment top portion (122) by sliding the positioning structure (240) in the axial direction of the mounting tube (100) and rotating the positioning structure (240) relative to the mounting tube (100).

4. The surgical opening device according to claim 1, characterized in that: The installation tube (100) is provided with a plug (110) at the tube end close to the guide head (220), and the plug (110) is provided with an axial hole (1101); The inner wall surface of the installation cylinder (100) is provided with a limiting protrusion (130); The linkage shaft (210) comprises a first shaft section (211), a second shaft section (212) and a third shaft section (213) which are connected in sequence, the first shaft section (211) and the second shaft section (212) are accommodated in the installation cylinder (100), the third shaft section (213) is passed through the shaft hole (1101), and the second shaft section is located between the limiting protrusion (130) and the plug (110); The guide head (220) is fixedly connected to one end of the third shaft segment (213) away from the second shaft segment (212), and the gripping mechanism (200) further comprises an elastic reset member (250), one end of the elastic reset member (250) elastically abuts against the limiting protrusion (130), and the other end elastically abuts against the second shaft segment (212).

5. The surgical opening device according to claim 4, characterized in that: The shape of the shaft hole (1101) is non-circular, and the cross-sectional shape of the third shaft segment (213) matches the shape of the shaft hole (1101); And / or, the gripping mechanism (200) further comprises an elastic sealing ring (260) accommodated in the installation tube, the elastic sealing ring (260) being sleeved on the second shaft segment (212), the inner ring surface of the elastic sealing ring (260) elastically abutting against the second shaft segment (212), and the outer ring surface elastically abutting against the inner tube wall surface of the installation tube (100), so as to seal the gap between the second shaft segment (212) and the inner tube wall surface of the installation tube (100); And / or, the shaft diameter of the second shaft segment (212) is greater than the shaft diameter of the first shaft segment (211), and the end of the elastic return member (250) away from the limiting protrusion (130) elastically abuts against the end face of the second shaft segment (212) close to the first shaft segment (211).

6. The surgical opening device according to claim 1, characterized in that: A snap-fit ​​groove (302) is formed on one end of the cylindrical knife (300) away from the blade (301), and the snap-fit ​​groove (302) comprises an introduction groove section (3021) extending from the barrel of the cylindrical knife (300) away from the blade (301) toward the blade (301), and a snap-fit ​​groove portion (3022) extending and bending from one end of the introduction groove section (3021) close to the blade (301) and communicating with the introduction groove section (3021); The mounting cylinder (100) is provided with a locking protrusion (140), and the locking protrusion (140) can slide from the introduction groove section (3021) into the locking groove portion (3022), and the locking protrusion (140) can abut against the groove wall of the locking groove portion (3022) to prevent the cylindrical knife (300) from moving in a direction close to the guide head (220); The mounting cylinder (100) comprises a cylinder body (150) with openings at both ends and an extension portion (160) extending outward from one end of the cylinder body (150), wherein the outer diameter of the extension portion (160) gradually decreases from the end close to the cylinder body (150) to the end away from the cylinder body (150); the inner diameter of the cylindrical knife (300) close to the blade (301) is smaller than the outer diameter of the end of the extension portion (160) close to the cylinder body (150), so that the end of the extension portion (160) close to the cylinder body (150) can prevent the cylindrical knife (300) from moving in a direction away from the guide head (220).

7. The surgical opening device according to claim 6, characterized in that: The engaging groove portion (3022) comprises a first engaging groove section (30221) which is connected to the end of the introduction groove section (3021) close to the blade (301) and extends circumferentially, and a second engaging groove section (30222) which is connected to the first engaging groove section (30221) and extends in a direction away from the blade (301), and the engaging protrusion (140) is capable of abutting against the groove wall of the second engaging groove section (30222) to prevent the cylindrical knife (300) from moving in a direction close to the guide head (220).

8. The surgical opening device according to any one of claims 1 to 7, characterized in that: The expandable component (230) includes a plurality of spring sheets (231), and the two ends of each of the spring sheets (231) are respectively fixed to the guide head (220) and the mounting tube (100). The plurality of spring sheets (231) are arranged around the linkage shaft (210). When the expandable component (230) is in an unexpanded state, the spring sheets (231) are curved, and the concave surface of the spring sheets (231) faces the linkage shaft (210).

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