Pericardial lifter and pericardial intervention device

Abstract

The present application discloses a pericardial lifter and a pericardial intervention device, wherein the pericardial lifter comprises a sheath and a traction needle that slides with the sheath, and a receiving cavity is provided at the distal end of the sheath. When the sheath moves relative to the pericardium, the pericardium enters the receiving cavity to be pre-fixed, and the traction needle can be switched between a first state and a second state during sliding, wherein in the first state, the traction needle adheres to the sheath, and in the second state, the distal end of the traction needle is deformed into a lifting hook that cooperates with the receiving cavity to hook the pericardium. The present application realizes the gathering of the pericardium in a preset area through the receiving cavity, which facilitates the traction needle to more stably pull the pericardium and avoids damage to peripheral tissues such as the myocardium.

Description

Technical Field

[0001] The present application relates to the field of medical equipment, and in particular to a pericardial lifter and a pericardial intervention device. Background Art

[0002] The heart consists of ventricles, myocardium and pericardium. The ventricles are surrounded by the myocardium, which is wrapped by the pericardium. The myocardium includes a fibrous layer, a parietal layer and a visceral layer from the outside to the inside. The visceral layer is also called the epicardium. There is a pericardial cavity between the epicardium and the parietal layer, which usually contains 20-25 ml of physiological fluid.

[0003] The current epicardial stem cell injection technology includes open-chest surgery, which has the disadvantages of large trauma and slow recovery, and is a great challenge especially for the elderly. Therefore, injecting stem cells into the pericardium through minimally invasive surgery has become a preferred treatment method.

[0004] The medical device used in minimally invasive surgery is a pericardial puncture device. After the tissue engaging needle on the pericardial puncture device cuts open the pericardium, the medical device enters the pericardial cavity along the pericardial puncture device, so that medical personnel can perform a medical operation of epicardial injection of stem cells in the pericardial cavity.

[0005] Of course, the medical procedures after opening the pericardium with a pericardiocentesis device are not limited to epicardial injection of stem cells, but also include puncture and drainage, myocardial resection, ablation, biological patch placement, left atrial appendage ligation and pacemaker placement.

[0006] The inventors have found that the pericardial puncture device in the prior art is easy to penetrate the pericardium and scratch the myocardium during use. Summary of the invention

[0007] In order to solve the above-mentioned technical problems, the present application discloses a pericardium lifting device, including a sheath and a traction needle that slides with the sheath, a receiving cavity is provided at the distal end of the sheath, when the sheath moves relative to the pericardium, the pericardium enters the receiving cavity to be pre-fixed, and the traction needle can switch between a first state and a second state during the sliding process, wherein in the first state the traction needle is attached to the sheath, and in the second state the distal end of the traction needle is deformed into a lifting hook that cooperates with the receiving cavity to hook the pericardium.

[0008] The present application achieves the gathering of the pericardium in a preset area through the receiving cavity, making it easier for the traction needle to more stably pull the pericardium and avoid damage to surrounding tissues such as the myocardium.

[0009] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0010] Optionally, the traction needle comprises:

[0011] A rod portion, attached to the sheath;

[0012] The hook portion is connected to the rod portion and switches between the first state and the second state through deformation, and the hook portion is deformed into a hook-shaped lifting hook in the second state.

[0013] The rod portion is used to realize the sliding of the traction needle relative to the sheath tube, and the hook portion is used to realize deformation to form a lifting hook. Structurally, the hook portion and the rod portion are an integrated structure or a separate structure.

[0014] Optionally, the restraining member does not cross the receiving cavity. This structure prevents the restraining member from being squeezed and deformed by the pericardium.

[0015] Optionally, the rod and / or the hook are elastic components and elastically drive the hook to remain in the second state;

[0016] The traction needle further includes a restraining member for maintaining the hook portion in the first state.

[0017] The rod and / or hook formed by the elastic component can realize automatic switching between the first state and the second state, reduce driving components, and cooperate with the restraining member to achieve a stable working effect through a simple mechanism.

[0018] Optionally, the restraining member is a restraining tube disposed on the sheath tube, the restraining tube extends from the distal end to the proximal end along with the sheath tube, and the rod portion and the hook portion are movably disposed in the restraining tube;

[0019] The hook portion in the second state protrudes out of the distal end of the restraining tube;

[0020] The hook portion in the first state is received in the restraint tube.

[0021] The sliding process of the traction needle relative to the sheath can be understood as the sliding process relative to the constraint tube, thereby realizing the switching of different states. At the same time, the change of the distal position setting of the constraint tube can also realize the change of the specific formation position and formation path of the lifting hook.

[0022] Optionally, the constraint tube is configured as follows:

[0023] Adhering to the inner wall and / or outer wall of the sheath tube; or arranged in the side wall of the sheath tube;

[0024] The hook portion in the second state is arranged as follows:

[0025] The restraining tube extends away from or toward the axis of the sheath tube.

[0026] The constraint tube disposed inside the sheath can provide a flat and smooth outer wall of the sheath, and the constraint tube disposed outside the sheath can provide space for arranging more pipelines inside the sheath; accordingly, different extension directions of the hook can provide different technical advantages in the matching relationship with the pericardium.

[0027] Optionally, the rod portion and / or the hook portion is a flexible component and switches between the first state and the second state through relative movement with the sheath tube.

[0028] The flexible rod and / or hook can meet the different technical requirements of the traction needle in the first state and the second state. The flexibility here is relative to the rigidity that cannot be deformed, so the flexibility here still needs to meet certain mechanical properties, especially the mechanical property requirements of the hook for lifting the pericardium.

[0029] Optionally, the distal end of the hook is provided with a first cutting edge capable of puncturing the pericardium.

[0030] The first cutting edge is used to realize the force exerted by the hook on the pericardium to realize lifting. The first cutting edge here serves to improve the interaction between the hook and the pericardium, and is not limited to puncturing or piercing the pericardium.

[0031] Optionally, a plurality of traction needles are evenly arranged in the circumferential direction of the sheath tube.

[0032] Increasing the number of traction needles can improve the effect of lifting the pericardium and ensure the stability of the operation.

[0033] Optionally, when the traction needle enters the second state from the first state, the distal end of the traction needle is located on a deformation path, and the deformation path is flush with or retracted compared to the distal end of the sheath tube.

[0034] The deformation path of the traction needle is flush or retracted compared to the distal end of the sheath tube, which can prevent the traction needle from causing damage to the myocardium. This setting can avoid operating problems for operators and improve adaptability.

[0035] Optionally, the lifting hook does not pass over the distal end of the sheath tube. Since the distal end of the sheath tube is close to the myocardium before the pericardium is lifted, the lifting hook does not pass over the distal end of the sheath tube to avoid the traction needle from passing over the sheath tube and scratching the myocardium.

[0036] Optionally, when the traction needle moves from the first state to the second state, the distal end of the traction needle never passes over the distal end of the sheath tube.

[0037] In order to lift the pericardium, the distal end of the traction needle may be provided with a structure such as a first cutting edge. By not going beyond the distal end of the sheath in this embodiment, the effect on the pericardium attached to the myocardium is avoided.

[0038] Optionally, during the process from the first state to the second state, the deformation path of the distal end of the traction needle never exceeds the distal end of the sheath tube.

[0039] The deformation path of the distal end of the traction needle can be understood as the movement path of the first cutting edge, that is, the movement path of the first cutting edge will not affect tissues other than the distal end of the sheath, thereby reducing unnecessary damage from a structural perspective.

[0040] Optionally, the receiving cavity is a closed channel or is open at the distal end of the sheath.

[0041] The receiving cavity may be a circumferentially closed structure or an area with an opening at the distal end of the sheath. From a functional point of view, it needs to be able to meet the needs of gathering or stacking the pericardium to facilitate traction on the pericardium at that location.

[0042] Optionally, the receiving cavity is open and has two opposite sides in the circumferential direction of the sheath tube. At least one side of the receiving cavity has a barb, the barb is adjacent to the open portion of the receiving cavity, and the barb is inclined relative to the axis of the sheath tube.

[0043] The barbs can guide the pericardium into the receiving cavity, especially when the pericardium moves relative to the barbs, which movement is easily achieved by rotating the sheath, etc.

[0044] Optionally, barbs are provided on two opposite sides of the receiving cavity, and the two barbs have the same inclination trend.

[0045] The two barbs with the same inclination trend can more conveniently enable the pericardium to enter the receiving cavity. The inclination trend should be understood as the inclination direction rather than the inclination angle. In actual products, the specific structures of the two barbs may be the same or different.

[0046] Optionally, a receiving area for receiving at least a portion of the pericardium is provided in the receiving cavity, and the receiving area extends in the axial direction of the sheath tube.

[0047] Optionally, the length of the receiving area in the axial direction of the sheath is greater than the length in the circumferential direction of the sheath. The function of the receiving area is to achieve the accumulation of pericardium here. In this embodiment, the proportional setting can leave deformation space in multiple axial directions for the traction needle to prevent the traction needle from crossing the distal end of the sheath. The receiving area can retain the pericardium entering the receiving cavity in the receiving cavity, and achieve a certain amount of accumulation or stacking to facilitate the interaction between the traction needle and the pericardium.

[0048] Optionally, the receiving area is connected to the open portion in an offset manner in the circumferential direction of the sheath.

[0049] The circumferentially staggered connected receiving area and the open portion can prevent the pericardium entering the receiving area from escaping from the receiving cavity by itself, thereby improving the restraining ability of the receiving cavity on the pericardium.

[0050] Optionally, at least one side of the receiving cavity is provided with a retaining edge, and the retaining edge is used to retain the pericardium in the receiving cavity.

[0051] The retaining edge can provide a continuous driving effect on the pericardium to improve the restraining ability of the receiving cavity on the pericardium.

[0052] Optionally, the barb is convex relative to the side where it is located, and the shape converges to form a second cutting edge. The second cutting edge can be understood as a structure that enhances the interaction with the pericardium, and is not limited to puncturing or piercing the pericardium.

[0053] Optionally, at least one of the barbs and the retaining edge are located on the same side of the receiving cavity, and the two are connected end to end.

[0054] The end-to-end setting can achieve seamless guidance of the pericardium, thereby ensuring that the pericardium entering the receiving cavity can be stably positioned.

[0055] Optionally, the side wall of the open part is inclined to form an avoidance slope for the pericardium to enter the receiving area in the receiving cavity. The avoidance slope plays a guiding role while avoiding, and cooperates to realize the movement of the pericardium in the receiving cavity; at the same time, the avoidance slope reserves space for the pericardium to enter the open area and the receiving area.

[0056] Optionally, the avoidance slope and the retaining edge are respectively located on two sides of the receiving cavity, the two are arranged opposite to each other, and a gap therebetween connects the receiving area and the open portion.

[0057] The avoidance slope and the retaining edge cooperate to guide and position the pericardium entering the opening of the chamber.

[0058] Optionally, in the axial projection of the sheath tube, a vertical gap is provided between the second cutting edge and the starting point of the avoidance slope.

[0059] The vertical gap provides a release space for the movement of the pericardium, so that it is easier to enter the receiving area with the cooperation of the barbs and the second cutting edge, which is conducive to the traction needle grasping the pericardium.

[0060] Optionally, a turning point is provided on the retaining edge, and in the circumferential projection of the sheath tube, the turning point is located between the starting point and the end point of the avoidance slope.

[0061] The positional relationship between the turning point and the avoidance slope can achieve uninterrupted guidance of the pericardium movement by the receiving opening, thereby improving the gripping effect of the receiving opening on the pericardium.

[0062] Optionally, the second cutting edge is flush with or retracted compared to the distal end of the sheath.

[0063] Compared with the distal end of the sheath, the second cutting edge that is flush or retracted can avoid affecting the tissue behind the pericardium and avoid unnecessary damage.

[0064] Optionally, a plurality of the receiving cavities are evenly arranged in the circumferential direction of the sheath tube.

[0065] The increase in the number of receiving cavities can improve the pre-matching ability of the pericardium, thereby providing a more stable traction matching effect for the traction needle.

[0066] Optionally, a receiving area for receiving at least a portion of the pericardium is provided in the receiving cavity; when the traction needle enters the second state from the first state, the distal end of the traction needle is located on a deformation path, and the deformation path passes through or is close to the receiving area.

[0067] When the deformation path of the traction needle passes through or approaches the receiving area, it will interact with the pericardium located in the receiving area, thereby achieving a traction effect. Compared with the existing technology, this coordination method can effectively avoid the effect of the traction needle on the pericardium attached to the myocardium, thereby protecting the surrounding tissues and reducing damage.

[0068] The technical solution in this embodiment provides a new idea. Those skilled in the art often hope to achieve pericardial grasping in one action, so a balance is sought between reducing damage to surrounding tissues and grasping strength. In this embodiment, two seemingly contradictory needs are taken into account through segmented grasping. The receiving cavity realizes weak grasping, realizes pre-fixation, and facilitates subsequent operations; the traction needle realizes strong grasping on the basis of the receiving cavity, and the segmented action takes into account the needs of safety and grasping strength.

[0069] Optionally, the deformation path extends from inside the sheath tube through the receiving area to outside the sheath tube; or

[0070] The deformation path extends from the outside of the sheath tube through the receiving area to the inside of the sheath tube.

[0071] The deformation path from inside the sheath to outside the sheath or from outside the sheath to inside the sheath can achieve penetration of the receiving area, thereby ensuring the establishment of a mutual coordination relationship between the traction target and the pericardium at that location and improving the stability of the device.

[0072] Optionally, during the process of the traction needle entering the second state from the first state, the distal end of the traction needle is turned outward compared to the axis of the sheath tube and passes through the receiving area.

[0073] In terms of the specific structure of the deformation, the distal end of the traction needle is the main component, which realizes puncture of the pericardium in the receiving area during the movement, thereby achieving a stable lifting effect.

[0074] Optionally, the traction needle and the receiving cavity are arranged in groups, and multiple groups of the traction needle and the receiving cavity are evenly arranged in the circumferential direction of the sheath tube.

[0075] The one-to-one correspondence between the traction needle and the receiving cavity can increase the pericardial portion that interacts with the sheath tube when the sheath tube size is constant, thereby achieving a better traction effect.

[0076] The present application also discloses a pericardial intervention device, including the pericardial lifting device and the pericardial puncture device in the above technical solution, wherein the pericardial puncture device includes a puncture piece, which is movably mounted on the sheath and has a puncture state moving toward the distal end and a retracted state moving toward the proximal end. The puncture needle in the puncture state is used to puncture the pericardium that interacts with the traction needle.

[0077] The pericardium lifting device lifts the pericardium in order to achieve pericardial puncture, and the puncture action is achieved by the puncture member.

[0078] Optionally, the puncture member includes a driving section extending from the distal end to the proximal end in the sheath and a puncture section arranged at the distal end of the driving end, and the driving section movably cooperates with the sheath and is used to drive the puncture section to enter the puncture state or the retracted state.

[0079] The driving end is movably installed in the sheath. Similar to the traction needle mentioned above, a corresponding driving structure can be set. When the traction needle and the receiving cavity cooperate to complete the lifting of the pericardium, the puncture section can stably achieve pericardial puncture, thereby carrying out further treatment process.

[0080] Optionally, the distal ends of the puncture segments converge to form a sharp portion for cutting the pericardium.

[0081] The sharp portion can achieve puncture of the pericardium, and the puncture section and the driving end can be internally provided with a connecting channel to set other pipelines, so as to facilitate subsequent operations after puncture.

[0082] Optionally, the puncture section is a puncture knife detachably mounted at the distal end of the drive section, and the distal end of the puncture knife converges to form a third cutting edge for cutting the pericardium.

[0083] The puncture knife can achieve a puncture effect different from the sharp part, forming different pericardial puncture shapes or sizes. The detachable design of the puncture knife can adapt the scalpel in existing products to be installed in the pericardial intervention device in this application, thereby improving the adaptability of the device.

[0084] Optionally, the pericardial puncture device further comprises a sleeve, wherein the sleeve is inserted into the sheath tube, and the puncture member is movably inserted into the sleeve.

[0085] The cannula can provide a receiving space for the puncture segment, thereby preventing the puncture segment from affecting surrounding pipelines during the interventional process.

[0086] Optionally, the pericardiocentesis device further comprises:

[0087] A sleeve, wherein the piercing member is movably disposed in the sleeve;

[0088] A puncture handle, on which the sleeve is mounted;

[0089] Active part, movably mounted on the puncture handle;

[0090] The driven member is connected to the piercing member and is driven by the active member to enable the piercing member to enter the piercing state or the retracted state.

[0091] The puncture handle can drive the puncture member to achieve stable puncture of the pericardium.

[0092] Optionally, the active member is a rotary component rotatably mounted on the puncture handle, and is provided with a first internal thread inside, and the driven member cooperates with the first internal thread to achieve movement.

[0093] The threaded fit has better motion accuracy and is convenient for controlling the motion of the piercing member.

[0094] Optionally, the puncture handle includes a lower seat connected to the sleeve and a detachably mounted upper seat, the upper seat and the lower seat are hollow inside and connected to each other, the active member is rotatably mounted on the upper seat, the driven member is located between the upper seat and the active member, a first guide hole is provided on the side wall of the upper seat, and the driving section is connected to the driven member through the first guide hole; a second guide hole is provided on the lower seat, a display panel is provided in the second guide hole, and the driving section is linked to the display panel through the two guide holes.

[0095] The puncture member driven by the structure in this embodiment has high movement accuracy and good puncture effect.

[0096] Optionally, the pericardium lifting device further includes a sheath handle, and the sheath handle includes:

[0097] A lower fixing member connected to the proximal end of the sheath tube;

[0098] an upper fixing member connected to the lower fixing member;

[0099] A force-applying member, movably mounted between the lower fixing member and the upper fixing member, wherein the interior of the force-applying member is hollow to form a driving chamber, and the interior of the sheath tube is communicated with the driving chamber;

[0100] A driving member is movably installed in the driving chamber. The driving member moves under the action of the force-applying member and drives the traction needle to slide relative to the sheath tube.

[0101] The sheath handle enables stable movement between the traction needle and the sheath, thereby precisely controlling the lifting and release of the pericardium.

[0102] In this embodiment, through the arrangement of various components, a compact arrangement inside the sheath handle is achieved, providing a better operating feel and overall spatial performance of the sheath handle.

[0103] Optionally, the lower fixing member is provided with a first through hole for installing the sheath tube, the upper fixing member is provided with a second through hole connected to the driving chamber, and the driving member is provided with a third through hole. The pipeline in the sheath tube enters the driving chamber via the first through hole, and extends to the proximal side of the sheath tube handle through the third through hole and the second through hole.

[0104] The arrangement of a partial pipeline passing through the sheath handle provides a structural basis for connecting other equipment with the central package interventional device of the present application.

[0105] The present application discloses a pericardial intervention device, including the pericardial lifter in the above technical solution, wherein the pericardial lifter is also provided with a pericardial puncture device, and the pericardium puncture device is used to puncture the pericardium interacting with the traction needle; the sheath is provided with an endoscope and a guide wire insertion channel.

[0106] The pericardial lifter is used to lift the pericardium, the pericardial puncturer is used to puncture the pericardium, the endoscope can realize real-time observation of the treatment process, and the guide wire is set through the insertion channel to provide a basis for subsequent treatment.

[0107] Optionally, the pericardial puncture device includes a puncture member, and the puncture channel is arranged inside the puncture member or outside the puncture member.

[0108] The setting of the puncture channel can bring different technical advantages. For example, if it is set inside the puncture member, the overall structure is more compact. Another example is that if it is set outside the puncture member, the two can move more independently and have better adaptability.

[0109] The specific beneficial technical effects will be further explained in the specific implementation methods in combination with specific structures or steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0110] Figure 1a This is a schematic diagram of a pericardial intervention device according to an embodiment;

[0111] Figure 1b for Figure 1a Schematic diagram of the distal end of the sheath on the pericardial lifter;

[0112] Figure 1c for Figure 1a Schematic diagram of the distal end of the upper sheath of the pericardial lifter from another perspective;

[0113] Figure 1d This is a schematic diagram of a receiving cavity according to an embodiment;

[0114] Figure 1e for Figure 1a Schematic diagram of the second state of the pericardial intervention device;

[0115] Figure 1f for Figure 1e Schematic diagram of the distal end of the sheath on the pericardial lifter;

[0116] Figure 1g for Figure 1e Schematic diagram of the distal end of the upper sheath of the pericardial lifter from another perspective;

[0117] Figure 1h to Figure 1m Schematic diagrams of different implementations of the receiving chamber;

[0118] Figure 2a This is a schematic diagram of a pericardial intervention device in one embodiment;

[0119] Figure 2b for Figure 2a Schematic diagram of the distal end of the sheath of the pericardial intervention device;

[0120] Figure 2c for Figure 2a Schematic diagram of the distal end of the sheath of the pericardial intervention device from another perspective;

[0121] Figure 2d for Figure 2a Schematic diagram of the internal structure of the distal end of the sheath of the pericardial intervention device;

[0122] Figure 2e for Figure 2a Schematic diagram of the second state of the pericardial intervention device;

[0123] Figure 2f for Figure 2e Schematic diagram of the distal end of the sheath of the pericardial intervention device;

[0124] Figure 2g for Figure 2e Schematic diagram of the distal end of the sheath of the pericardial intervention device from another perspective;

[0125] Figure 3a A schematic diagram of a pericardial puncture device in one embodiment;

[0126] Figure 3b A schematic diagram of a pericardial puncture device in another embodiment;

[0127] Figure 3c for Figure 3b Schematic diagram of the distal end of the pericardiocentesis device;

[0128] Figure 3d for Figure 3b Schematic diagram of the internal structure of the distal end of the pericardiocentesis device;

[0129] Figure 3e for Figure 3b Schematic diagram of the puncture handle on the pericardiocentesis device;

[0130] Figure 3f for Figure 3e A schematic cross-sectional view of the puncture handle;

[0131] Figure 3g for Figure 3e Schematic diagram of the internal structure of the puncture handle;

[0132] Figure 3h for Figure 3e Schematic diagram of the internal structure of the puncture handle;

[0133] Figure 4a This is a schematic diagram of the internal structure of the sheath handle in one embodiment;

[0134] Figure 4b for Figure 4a Another perspective diagram of the internal structure of the sheath handle;

[0135] Figure 4c for Figure 4a A schematic diagram of the force applying member and the upper fixing member from another perspective;

[0136] Figure 4d for Figure 4a Schematic diagram of the internal structure of the middle sheath handle in the second state;

[0137] Figure 4e for Figure 4a Schematic diagram of the internal structure of the middle sheath handle in the first state;

[0138] Figure 4f This is a schematic diagram of the internal structure of a pericardial intervention device in a first state in an embodiment;

[0139] Figure 4g for Figure 4f Schematic diagram of the internal structure of the sheath handle;

[0140] Figure 4h for Figure 4g Schematic diagram of the sheath-handle coordination relationship;

[0141] Figure 5a A schematic diagram of an interventional device attached to the pericardium in one embodiment;

[0142] Figure 5b A schematic diagram of an interventional device stirring up the pericardium in one embodiment;

[0143] Figure 5c A schematic diagram of an interventional device fixing the pericardium in one embodiment;

[0144] Figure 5d This is a schematic diagram of an interventional device lifting the pericardium in one embodiment;

[0145] Figure 5e A schematic diagram of an interventional device puncturing the pericardium in one embodiment;

[0146] Figure 5f Schematic diagram of a guide wire for inserting an interventional device in one embodiment.

[0147] The reference numerals in the figures are described as follows:

[0148] 1. sheath; 11. receiving cavity; 111. barb; 112. opening part; 113. receiving area; 114. holding edge; 115. second cutting edge; 116. avoidance slope; 1161. starting point; 1162. end point; 117. turning point; 2. traction needle; 21. rod; 22. hook; 221. first cutting edge; 23. restraining tube; 3. puncture member; 31. driving section; 32. puncture section; 33. third cutting edge; 34. sleeve; 351. puncture handle; 3511. lower seat; 3512. upper seat; 3513. 513, first guide hole; 3514, second guide hole; 3515, display panel; 352, active member; 3521, first internal thread; 353, driven member; 36, insertion channel; 4, sheath handle; 41, lower fixing member; 411, first through hole; 42, force applying member; 421, second internal thread; 43, driving member; 431, third through hole; 432, restraining groove; 44, upper fixing member; 441, second through hole; 442, sealing plug; 45, driving chamber; 451, guide rod; 9, guide wire; 10, pericardium. DETAILED DESCRIPTION

[0149] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0150] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be a central component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be a central component at the same time.

[0151] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0152] refer to Figure 1a to Figure 2g The present application discloses a pericardial lifting device, comprising a sheath tube 1 and a traction needle 2 that slides with the sheath tube 1. The traction needle 2 can be in a first state (see attached Figure 1a ) and the second state (see Appendix Figure 1e ), wherein in the first state the traction needle 2 is attached to the sheath tube 1, and in the second state the distal end of the traction needle 2 is deformed into a lifting hook for hooking the pericardium; a receiving cavity 11 adjacent to the lifting hook is provided at the distal end of the sheath tube 1.

[0153] The technical solution in this embodiment achieves the gathering of the pericardium in a preset area through the receiving cavity 11, which facilitates the traction needle 2 to more stably pull the pericardium and avoid damage to peripheral tissues such as the myocardium.

[0154] Functionally, the receiving cavity 11 is used to gather the pericardium, and the traction needle 2 is used to pull the pericardium. Referring to an embodiment, the traction needle 2 includes:

[0155] The rod portion 21 is attached to the sheath tube 1;

[0156] The hook portion 22 is connected to the rod portion 21 and switches between a first state and a second state through deformation. In the second state, the hook portion 22 is deformed into a hook-shaped lifting hook.

[0157] The changes between different states of the traction needle 2 can be reflected only by the changes of the hook 22, or can be achieved by the changes of both the rod 21 and the hook 22. The rod 21 is used to achieve the sliding of the traction needle 2 relative to the sheath 1, and the sliding of the hook 22 is actually mechanically transmitted by the rod 21. The hook 22 is used to achieve deformation to form a lifting hook, which is used to interact with the pericardium to achieve the lifting effect. Structurally, the hook 22 and the rod 21 are an integrated structure or a split structure.

[0158] The change of the traction needle 2 between the two states is mainly reflected in the change of its own shape, which can be achieved by the driving mechanism changing the position of the traction needle 2. It can also be referred to that in one embodiment, the rod 21 and / or the hook 22 are elastic components, and the elastic driving hook 22 is maintained in the second state under the action of its own elasticity;

[0159] The traction needle 2 further comprises a restraining member for keeping the hook portion 22 in the first state, and the restraining member does not go beyond the receiving cavity 11 .

[0160] The rod 21 and / or hook 22 formed of the elastic component can realize automatic switching between the first state and the second state, reduce the driving components, and cooperate with the constraint member to achieve a stable working effect through a simple mechanism. In this field, memory metal is a conventional choice of material for the traction needle 2, wherein the memory metal includes nickel-titanium metal.

[0161] The traction needle 2 can switch between the two states by changing the properties of its own material, or by a driving mechanism. For example, in one embodiment, the restraint is a restraint tube 23 disposed on the sheath tube 1, the restraint tube 23 extends from the distal end to the proximal end along with the sheath tube 1, and the rod 21 and the hook 22 are movably arranged in the restraint tube 23; the hook 22 in the second state protrudes from the distal end of the restraint tube 23; the hook 22 in the first state is accommodated in the restraint tube 23.

[0162] The sliding process of the traction needle 2 relative to the sheath tube 1 can be understood as the sliding process relative to the constraint tube 23, thereby realizing the switching of different states. At the same time, the change of the distal position setting of the constraint tube 23 can also realize the change of the specific formation position and formation path of the lifting hook. The constraint tube 23 drives the traction needle 2 into the first state by guiding the traction needle 2. At the same time, the constraint tube 23 can also accommodate the traction needle 2 to avoid the traction needle 2 from affecting the surrounding pipelines or tissues during the intervention process.

[0163] There are multiple options for setting the restraining tube 23 according to the pipeline settings inside the product and different usage scenarios.

[0164] Reference Figure 2b In the disclosed embodiment, the restraint tube 23 is attached to the inner wall of the sheath tube 1. The restraint tube 23 is arranged inside the sheath tube 1 to provide a flat and smooth outer wall of the sheath tube 1, which facilitates the implementation of the interventional procedure.

[0165] Reference Figure 1bIn the disclosed embodiment, the restraint tube 23 is attached to the outer wall of the sheath tube 1. The restraint tube 23 is arranged outside the sheath tube 1 to provide space for arranging more pipelines inside the sheath tube 1, and provides a structural basis for complex treatment processes, especially for implementation methods that require multiple devices to enter the sheath tube 1. At the same time, the restraint tube 23 itself can increase the roughness and surface area of ​​the sheath tube surface, thereby increasing the contact area between the pericardium and the sheath tube and the winding force.

[0166] In other embodiments, the restraining tube 23 is disposed in the side wall of the sheath tube 1. This arrangement takes into account the advantages of the above two embodiments, but has certain requirements on the wall thickness of the sheath tube 1, and accordingly, the mechanical properties of the sheath tube 1 will also be affected to a certain extent.

[0167] With respect to the arrangement relationship between the restraining tube 23 and the sheath tube 1 , the hook portion 22 in the second state also has multiple independent arrangement modes.

[0168] Reference Figure 1g In the disclosed embodiment, the hook portion 22 in the second state extends from the restraining tube 23 away from the axis of the sheath tube 1. The arrangement of extending away from the axis of the sheath tube enables the hook portion 22 to form a larger effective area than the diameter of the sheath tube in the second state, especially when there are multiple hook portions 22. The increase in the projection area of ​​the hook portion 22 in the axial direction of the sheath tube 1 in the second state can act on a larger area of ​​the pericardium, thereby improving the lifting effect.

[0169] In other embodiments, the hook portion 22 in the second state extends from the restraining tube 23 toward the axis of the sheath tube 1. This arrangement can avoid the hook portion 22 in the second state from interfering with surrounding tissues, but the extension toward the axis of the sheath tube 1 may cause mutual interference with the pipeline of the device that enters the human body along with the sheath tube 1. Therefore, different arrangements are adjusted according to different treatment cases, so as to achieve better treatment effects in collaboration.

[0170] In general, referring to one embodiment, the rod 21 and / or the hook 22 is a flexible component and switches between the first state and the second state through relative movement with the sheath tube 1 .

[0171] The flexible rod 21 and / or hook 22 can meet different technical requirements of the traction needle 2 in the first state and the second state. The flexibility here is relative to the rigidity that cannot be deformed, so the flexibility here still needs to meet certain mechanical properties, especially the mechanical property requirements of the hook 22 for the lifting operation of the pericardium.

[0172] The ultimate purpose of the hook portion 22 is to lift the pericardium, so it needs to interact with the pericardium. In terms of the specific action site, referring to one embodiment, the distal end of the hook portion 22 is provided with a first cutting edge 221 capable of piercing the pericardium.

[0173] The first cutting edge 221 is used to achieve the force applied by the hook portion 22 to the pericardium to achieve lifting. In some embodiments, the first cutting edge 221 punctures part of the pericardium to achieve stable lifting. In other embodiments, the first cutting edge 221 serves to enhance the interaction between the hook portion 22 and the pericardium, and is not limited to puncturing or piercing the pericardium. For example, the first cutting edge 221 has a rough surface to interact with the pericardium, especially after the first cutting edge 221 cooperates with the collection and stacking of the pericardium by the receiving cavity 11, the first cutting edge 221 can avoid damage to the pericardium.

[0174] The increase in the number of traction needles 2 can improve the effect of lifting the pericardium and ensure the stability of the operation. Therefore, referring to an embodiment, a plurality of traction needles 2 are evenly arranged in the circumferential direction of the sheath tube 1.

[0175] In the prior art, because the pericardium attached to the myocardium needs to be pulled up, it is easy to affect the myocardium. Referring to one embodiment, when the traction needle 2 enters the second state from the first state, the distal end of the traction needle 2 is located on the deformation path, and the deformation path is flush or retracted compared to the distal end of the sheath 1.

[0176] In this embodiment, the setting of the accommodating cavity 11 can achieve the pulling of the pericardium when the deformation path of the traction needle 2 is flush with or retracted compared to the distal end of the sheath 1, thereby preventing the traction needle 2 from causing damage to the myocardium. This setting can structurally avoid operational problems for operators, reduce learning costs, and improve adaptability.

[0177] In terms of specific components, referring to one embodiment, the lifting hook does not go beyond the distal end of the sheath tube 1 .

[0178] The lifting hook is the part that actually interacts with the pericardium, and the lifting hook can avoid acting on the pericardium attached to the myocardium with the cooperation of the receiving cavity 11, thereby reducing the possibility of affecting the myocardium, especially in the embodiment in which the lifting hook is provided with a corresponding puncture structure.

[0179] In terms of specific location, the distal end face of the traction needle 2 is a position that easily affects the myocardium. Referring to an embodiment, when the traction needle 2 moves from the first state to the second state, the distal end of the traction needle 2 never exceeds the distal end of the sheath 1.

[0180] In order to pull up the pericardium, the distal end of the traction needle 2 may be provided with a structure such as a first cutting edge 221. By not going beyond the distal end of the sheath tube 1 in this embodiment, the effect on the pericardium attached to the myocardium is avoided.

[0181] From the perspective of the motion trajectory, referring to one embodiment, when the traction needle 2 moves from the first state to the second state, the deformation path of the distal end of the traction needle 2 never passes over the distal end of the sheath 1 .

[0182] The deformation path of the distal end of the traction needle 2 can be understood as the movement path of the first cutting edge 221, that is, the movement path of the first cutting edge 221 will not affect the tissue other than the distal side of the sheath 1, thereby structurally avoiding the traction needle 2 from scratching the myocardium in the process from the first state to the second state.

[0183] refer to Figure 1a to Figure 2g The present application discloses a pericardium lifting device, comprising a sheath 1 and a traction needle 2 that slides with the sheath 1. The traction needle 2 can switch between a first state and a second state during sliding. In the first state, the traction needle 2 is attached to the sheath 1. In the second state, the distal end of the traction needle 2 is deformed into a lifting hook for hooking the pericardium. A receiving cavity 11 adjacent to the lifting hook is provided at the distal end of the sheath 1.

[0184] In this embodiment, the receiving cavity 11 is open and has two opposite sides in the circumferential direction of the sheath 1 , at least one side of which has a barb 111 . The barb 111 is adjacent to an open portion 112 of the receiving cavity 11 and is inclined relative to the axis of the sheath 1 .

[0185] The barbs 111 can guide the pericardium into the receiving cavity 11, especially when the pericardium moves relative to the barbs 111, which can be easily achieved by rotating the sheath 1. When the barbs 111 are tilted relative to the axis of the sheath 1, the barbs 111 will exert a force on the pericardium acting thereon away from the myocardium, thereby achieving the gathering of the pericardium and facilitating the traction needle 2 to perform the next operation.

[0186] From a functional point of view, the receiving cavity 11 can achieve the effect of stirring up or even hooking and pulling the pericardium. There are many options for the specific shape of the receiving cavity 11, and it can even be hook-shaped (not shown in the figure). From a functional point of view, all of them can be achieved. Figure 1d , Figure 1h to Figure 1m Multiple ways shown.

[0187] Figure 1d and Figure 1h The difference between the embodiments is that the receiving area 113 extends in a direction, Figure 1g In the embodiment, better pericardial lateral convergence can be achieved. Figure 1d In the embodiment, better vertical focusing of the pericardium can be achieved.

[0188] Figure 1j and Figure 1L The embodiment of the present invention differs in the extension depth of the receiving area 113 and the number of the receiving areas 113. Figure 1L In the embodiment of 1m, the depth of the receiving area 113 is increased and the number of the receiving areas 113 is reduced. Figure 1j , 1kIn the embodiment, the depth of the receiving area 113 is reduced and the number of the receiving areas 113 is increased.

[0189] The following will focus on Figure 1d The receiving cavity 11 in the embodiment is taken as an example to explain the functions and design ideas of various structures in the receiving cavity 11. The receiving cavities 11 in other implementation modes are similar and will not be described in detail.

[0190] Similar to the change in shape, the number of the receiving area 113 in the circumferential direction can also be adjusted and changed accordingly. Specifically, the number of barbs 111 changes. The increase in the number of barbs 111 can improve the gathering and effect of the receiving cavity 11 on the pericardium. Referring to an embodiment, barbs 111 are provided on opposite sides of the receiving cavity 11, and the inclination trend of the two barbs 111 is consistent.

[0191] The two barbs 111 with the same inclination trend can more conveniently allow the pericardium to enter the receiving cavity 11. The inclination trend should be understood as the inclination direction rather than the inclination angle. The barbs with the same inclination trend can achieve rapid release of the pericardium. For example, when the sheath rotates in the opposite direction, the pericardium can be separated from the receiving cavity 11 under the action of the barbs, avoiding damage to the pericardium during the release process.

[0192] In addition to achieving the collection of the pericardium, the receiving cavity 11 also needs to collect the pericardium in a smaller range to facilitate the interaction between the traction needle 2 and the pericardium there. Referring to an embodiment, a receiving area 113 for accommodating at least a portion of the pericardium is provided in the receiving cavity 11, and the receiving area 113 extends in the axial direction of the sheath 1.

[0193] The receiving area 113 can retain the pericardium that has entered the receiving cavity 11 in the receiving cavity 11 and achieve a certain degree of aggregation or stacking.

[0194] Regarding the specific arrangement of the receiving area 113 , referring to one embodiment, the receiving area 113 is connected to the open portion 112 in a staggered manner in the circumferential direction of the sheath tube 1 .

[0195] The circumferentially staggered connected receiving area 113 and open portion 112 can prevent the pericardium entering the receiving area 113 from escaping from the receiving cavity 11 by itself, thereby improving the restraining ability of the receiving cavity 11 on the pericardium.

[0196] In order to realize the pericardium being held in a certain position, other structures may be provided in addition to the receiving area 113. Referring to an embodiment, the receiving cavity 11 is open, and the receiving cavity 11 is provided with two opposite sides in the circumferential direction of the sheath tube 1, at least one side of which is provided with a retaining edge 114, and the retaining edge 114 is used to retain the pericardium in the receiving cavity 11.

[0197] The retaining edge 114 can provide a continuous driving effect on the pericardium to improve the restraining ability of the receiving cavity 11 on the pericardium.

[0198] In addition to the above mentioned function of gathering the pericardium, the receiving cavity 11 can also realize the pre-fixation of the pericardium. Referring to an embodiment, the barbs 111 are relatively convex relative to the side where they are located, and the shape converges to form a second cutting edge 115 .

[0199] The second cutting edge 115 is used to achieve the force applied by the barbs 111 to the pericardium to achieve pre-fixation. In some embodiments, the second cutting edge 115 pierces part of the pericardium to achieve stable pulling. In other embodiments, a retaining structure that increases friction is provided on the second cutting edge 115. This arrangement is intended to overcome the technical problem that the pericardium is easily separated from the second cutting edge during the pulling process or the process of the puncture member piercing the pericardium. Accordingly, in some embodiments, the second cutting edge 115 is configured as a retaining structure that increases friction. The function of this structure is to enhance the interaction between the hook 22 and the pericardium and reduce the impact on the pericardium. For example, through the interaction between the rough surface and the pericardium, especially after the barbs 111 gather and stack the pericardium, the retaining structure can provide a good fixation effect while reducing damage to the pericardium.

[0200] Reference Figure 1d In the disclosed embodiment, at least one of the barbs 111 and the retaining edge 114 are located on the same side of the receiving cavity 11 , and the two are connected end to end.

[0201] In the attached drawings, the barbs 111 and the retaining edge 114 on the left side of the drawing are connected end to end, and this arrangement can achieve seamless guidance of the pericardium, thereby ensuring that the pericardium entering the receiving cavity 11 can be stably positioned. Similarly, on the other side of the drawing, the side wall of the open portion 112 is inclined to form an escape slope 116 for the pericardium to enter the receiving area 113 in the receiving cavity 11, and at least one of the barbs 111 and the escape slope 116 are located on the same side of the receiving cavity 11, and the two are connected end to end.

[0202] The avoidance slope 116 plays a guiding role while avoiding, and cooperates to realize the movement of the pericardium in the receiving cavity 11; at the same time, the avoidance slope 116 reserves space for the pericardium to enter the open area and the receiving area 113.

[0203] Referring to an embodiment, the avoidance slope 116 and the retaining edge 114 are respectively located on two sides of the receiving cavity 11 , and the two are arranged opposite to each other and a gap therebetween connects the receiving area 113 and the open portion 112 .

[0204] The avoidance slope 116 and the retaining edge 114 cooperate to guide and position the pericardium entering the open-heart area.

[0205] In terms of relative positional relationship, referring to one embodiment, in the axial projection of the sheath tube, the second cutting edge 115 is located between the starting point 1161 and the end point 1162 of the avoidance slope 116 , and a vertical gap D1 is provided between the second cutting edge 115 and the starting point 1161 of the avoidance slope 116 .

[0206] The vertical gap provides a release space for the movement of the pericardium, so that it is easier to enter the receiving area 113 with the cooperation of the barbs 111 and the second cutting edge 115, which is conducive to the traction needle grasping the pericardium.

[0207] Referring to one embodiment, a turning point 117 is provided on the retaining edge 114 . In the circumferential projection of the sheath tube, the turning point 117 is located between a starting point 1161 and an end point 1162 of the avoidance slope 116 .

[0208] The positional relationship between the turning portion 117 and the avoidance slope 116 can achieve uninterrupted guidance of the pericardium movement by the receiving port, thereby improving the gripping effect of the receiving port on the pericardium.

[0209] Similar to the traction needle 2 , in order to avoid affecting the myocardium, referring to an embodiment, the second cutting edge 115 is flush with or retracted compared to the distal end of the sheath tube 1 .

[0210] Compared with the second cutting edge 115 which is flush or retracted with the distal end of the sheath tube 1 , it is possible to avoid affecting the tissue behind the pericardium and avoid unnecessary damage.

[0211] The increase in the number of receiving cavities 11 can improve the pre-matching capability of the pericardium, thereby providing a more stable pulling and matching effect for the traction needle 2. Referring to an embodiment, a plurality of receiving cavities 11 are evenly arranged in the circumferential direction of the sheath tube 1.

[0212] refer to Figures 1a to 2e The present application discloses a pericardium lifting device, comprising a sheath 1 and a traction needle 2 that slides with the sheath 1. The traction needle 2 can switch between a first state and a second state during sliding. In the first state, the traction needle 2 is attached to the sheath 1. In the second state, the distal end of the traction needle 2 is deformed into a lifting hook for hooking the pericardium. A receiving cavity 11 adjacent to the lifting hook is provided at the distal end of the sheath 1.

[0213] In this embodiment, a receiving area 113 for receiving at least a portion of the pericardium is provided in the receiving cavity 11 ; when the traction needle 2 enters the second state from the first state, the distal end of the traction needle 2 is located on the deformation path, and the deformation path passes through or is close to the receiving area 113 .

[0214] When the deformation path of the traction needle 2 passes through or approaches the receiving area 113, it will interact with the pericardium located in the receiving area 113, thereby achieving a traction effect. Compared with the prior art, this coordination method can effectively avoid the interaction between the traction needle 2 and the pericardium located outside the receiving port. Compared with the prior art solution in which the traction needle directly operates on the pericardium attached to the myocardium, the implementation method in this embodiment can effectively protect the surrounding tissues and reduce damage.

[0215] There are many ways of cooperation when the traction needle 2 interacts with the pericardium in the receiving area 113. Figure 2f In the disclosed embodiment, the deformation path extends from the inside of the sheath tube 1 through the receiving area 113 to the outside of the sheath tube 1; Figure 1f In the disclosed embodiment, the deformation path extends from the outside of the sheath tube 1 through the side of the receiving area 113 and away from the axis of the sheath tube 1; in another embodiment, the deformation path extends from the outside of the sheath tube 1 through the receiving area 113 to the inside of the sheath tube 1; in another embodiment, the deformation path extends from the inside of the sheath tube 1 through the side of the receiving area 113 toward the axis of the sheath tube 1.

[0216] The deformation path from inside the sheath tube 1 to outside the sheath tube 1 or from outside the sheath tube 1 to inside the sheath tube 1 can penetrate the receiving area 113, thereby ensuring the establishment of a mutual cooperation relationship between the traction needle 2 and the pericardium at that location, and improving the stability of the device; the deformation path passing through one side of the receiving area 113 can avoid excessive damage to the pericardium. The rich setting methods can provide better adaptability and better treatment effect in conjunction with the flexible setting of the first cutting edge 221.

[0217] From the perspective of a stable lifting effect, referring to an embodiment, when the traction needle 2 enters the second state from the first state, the distal end of the traction needle 2 is turned outward compared to the axis of the sheath tube 1 and passes through the receiving area 113 .

[0218] In the specific structure of the deformation, the distal end of the traction needle 2 is the main component, which realizes puncture of the pericardium in the receiving area 113 during the movement, thereby achieving a stable lifting effect.

[0219] The one-to-one correspondence between the traction needle 2 and the receiving cavity 11 can increase the pericardium portion that interacts with the sheath tube 1 when the size of the sheath tube 1 is constant, thereby achieving a better traction effect. Referring to an embodiment, the traction needle 2 and the receiving cavity 11 are arranged in groups, and multiple groups of traction needles 2 and receiving cavities 11 are evenly arranged in the circumferential direction of the sheath tube 1.

[0220] refer to Figure 1a to Figure 4hThe present application also discloses a pericardial intervention device, including the pericardial lifting device and the pericardial puncture device in the above technical solution, the pericardial puncture device includes a puncture member 3, the puncture member 3 is movably mounted on the sheath 1 and has a puncture state moving toward the distal end and a retracted state moving toward the proximal end, the puncture needle in the puncture state is used to puncture the pericardium that interacts with the traction needle 2.

[0221] The pericardium lifting device lifts the pericardium in order to achieve pericardial puncture, and the puncture action is achieved by the puncture member 3.

[0222] In terms of the implementation of the puncture member 3, referring to one embodiment, the puncture member 3 includes a driving section 31 extending from the distal end to the proximal end in the sheath 1 and a puncture section 32 arranged at the distal end of the driving end, and the driving section 31 is movably cooperated with the sheath 1 and is used to drive the puncture section 32 to enter a puncture state or a retracted state.

[0223] The driving end is movably installed in the sheath 1. Similar to the traction needle 2 mentioned above, a corresponding driving structure can be set. When the traction needle 2 and the receiving cavity 11 cooperate to complete the lifting of the pericardium, the puncture section 32 can stably achieve pericardial puncture, thereby carrying out further treatment process.

[0224] Different designs of the puncture member 3 can meet different treatment requirements. Figure 3a In the disclosed embodiment, the distal ends of the puncture segments 32 converge to form a sharp point for cutting the pericardium.

[0225] The sharp portion can achieve puncture of the pericardium, and at the same time, the puncture section 32 and the driving end can be provided with a communicating channel inside to set other pipelines, so as to facilitate subsequent operations after puncture.

[0226] Reference Figure 3b to Figure 3d In the disclosed embodiment, the puncture section 32 is a puncture knife detachably mounted at the distal end of the driving section 31, and the distal end of the puncture knife converges to form a third cutting edge 33 for cutting the pericardium.

[0227] The puncture knife can achieve a puncture effect different from the sharp part, forming different pericardial puncture shapes or sizes. The detachable design of the puncture knife can adapt the scalpel in existing products to be installed in the pericardial intervention device in this application, thereby improving the adaptability of the device.

[0228] During the intervention of the puncture member 3, it may affect the surrounding pipelines. Figure 3c In the disclosed embodiment, the pericardial puncture device further includes a sleeve 34 , the sleeve 34 is inserted into the sheath 1 , and the puncture member 3 is movably inserted into the sleeve 34 .

[0229] The sleeve 34 can provide a receiving space for the puncture section 32 to prevent the puncture section 32 from affecting surrounding pipelines during the intervention process.

[0230] In one embodiment, the pericardial puncture device further comprises:

[0231] A sleeve 34, in which the piercing member 3 is movably inserted;

[0232] A puncture handle 351, on which the sleeve 34 is mounted;

[0233] An active member 352 is movably mounted on the puncture handle 351;

[0234] The driven member 353 is connected to the piercing member 3 and is driven by the active member 352 to enable the piercing member 3 to enter the piercing state or the retracted state.

[0235] The puncture handle 351 can drive the puncture member 3 to achieve stable puncture of the pericardium. The active member 352 drives the driven member 353 to move during the movement, thereby achieving the movement of the driving end relative to the sleeve 34.

[0236] In terms of the driving relationship, referring to one embodiment, the active member 352 is a rotating member rotatably mounted on the puncture handle 351, and is provided with a first internal thread 3521 inside, and the driven member 353 is provided with a first external thread (unnumbered) that cooperates with the first internal thread 3521.

[0237] From the structural point of view, referring to an embodiment, the puncture handle 351 includes a lower seat 3511 connected to the sleeve 34 and a detachably mounted upper seat 3512. The upper seat 3512 and the lower seat 3511 are hollow inside and connected to each other. The active member 352 is rotatably sleeved on the upper seat 3512. The driven member 353 is located between the upper seat 3512 and the active member 352. A first guide hole 3513 is opened on the side wall of the upper seat 3512. The driving section 31 is connected to the driven member 353 through the first guide hole 3513. The first guide hole 3513 guides the movement of the driving section 31 and the driven member 353 and also provides a movement limit. A second guide hole 3514 is provided on the lower seat 3511, and the driving section 31 is provided with a display panel 3515 arranged in the second guide hole 3514. The display panel 3515 is used to cooperate with the lower seat 3511 to indicate the movement stroke of the puncture member 3, so that the operator can control the length of the puncture member extending out of the sleeve and observe the specific progress of the puncture with the endoscope to achieve precise control.

[0238] refer to Figure 4a to Figure 4h The present application also discloses a pericardial intervention device, including the pericardial lifting device and the pericardial puncture device in the above technical solution, the pericardial puncture device includes a puncture member 3, the puncture member 3 is movably mounted on the sheath 1 and has a puncture state moving toward the distal end and a retracted state moving toward the proximal end, the puncture needle in the puncture state is used to puncture the pericardium that interacts with the traction needle 2.

[0239] In this embodiment, the pericardium lifting device further includes a sheath handle 4, and the sheath handle 4 includes:

[0240] A lower fixing member 41 connected to the proximal end of the sheath tube 1;

[0241] An upper fixing member 44 connected to the lower fixing member 41;

[0242] A force applying member 42 is movably installed between the lower fixing member 41 and the upper fixing member 44. The inside of the force applying member 42 is hollow to form a driving chamber 45. The inside of the sheath tube 1 is connected to the driving chamber 45.

[0243] The driving member 43 is movably installed in the driving chamber 45 . The driving member 43 is moved by the force applying member 42 and drives the traction needle 2 to slide relative to the sheath tube 1 .

[0244] The sheath handle 4 can achieve stable movement between the traction needle 2 and the sheath 1, thereby accurately controlling the lifting and release of the pericardium.

[0245] From the transmission relationship point of view, referring to one embodiment, the force-applying member 42 is a rotating knob rotatably mounted on the lower fixing member 41, and is provided with a second internal thread 421 inside. The driving member 43 is provided with a second external thread (unnumbered), and the second external thread cooperates with the second internal thread 421 to realize axial movement.

[0246] In this embodiment, through the arrangement of various components, a compact arrangement inside the sheath handle 4 is achieved, providing a better operating feel and an overall spatial performance of the sheath handle 4 .

[0247] The driving chamber 45 provides a relatively closed space for the movement of the driving member 43. In order to improve the stability of the movement of the driving member 43, the driving chamber 45 is relatively closed. Figure 4a and attached Figure 4g In the disclosed embodiment, a guide rod 451 is installed between the lower fixing member 41 and the upper fixing member 44, and the driving member 43 is slidably disposed on the guide rod 451. The guide rod 451 can guide the movement of the driving member 43 to provide a more stable driving effect of the traction needle 2. From the perspective of the matching relationship, the guide rod 451 penetrates the driving member 43.

[0248] In the matching relationship between the traction needle 2 and the driving member 43, referring to an embodiment, the proximal end side of the traction needle 2 is bent and placed on the proximal end face of the driving member 43. During the movement of the driving member 43, transmission can be achieved through the abutting end faces of the two. In order to improve stability, a restraining groove 432 for mounting the proximal side of the traction needle 2 is provided on the proximal end face of the driving member 43.

[0249] In terms of connectivity, referring to one embodiment, a first through hole 411 for mounting the sheath 1 is provided on the lower fixing member 41, a second through hole 441 communicating with the drive chamber 45 is provided on the upper fixing member 44, a third through hole 431 is provided on the drive member 43, and the pipeline in the sheath 1 enters the drive chamber 45 via the first through hole 411, and extends to the proximal side of the sheath handle 4 through the third through hole 431 and the second through hole 441.

[0250] The arrangement of some pipelines passing through the sheath handle 4 provides a structural basis for connecting other devices with the central package intervention device of the present application. In order to realize a more closed driving chamber 45, the sheath 1 is sealed with the first through hole 411, and a sealing plug 442 is provided on the second through hole 441, and a pipeline hole (not numbered) for the pipeline to pass through is provided on the sealing plug 442.

[0251] It is not difficult to find that as the positional relationship between the restraining tube 23 and the sheath tube 1 changes, the proximal installation position of the sheath tube 1 can also change accordingly. Figure 4d and attached Figure 4g In the illustrated embodiment, when the restraining tube 23 is disposed outside the sheath tube 1 , the traction needle 2 can be conveniently matched with the restraining groove 432 , so that the sheath tube 1 can extend all the way to the vicinity of the sealing plug 442 , and the fixing effect of the sheath tube 1 is correspondingly improved.

[0252] refer to Figures 1a to 5f The present application discloses a pericardial intervention device, including the pericardial lifter in the above technical solution, on which a pericardial puncture device is also provided, which is used to puncture the pericardium that interacts with the traction needle 2; an endoscope and a guide wire insertion channel 36 are provided in the sheath 1.

[0253] The pericardial lifter is used to lift the pericardium, the pericardial puncturer is used to puncture the pericardium, the endoscope can realize real-time observation of the treatment process, and the guide wire is set through the insertion channel 36 to provide a basis for subsequent treatment.

[0254] Referring to one embodiment, the pericardial puncture device includes a puncture member 3 , and a puncture channel 36 is disposed inside or outside the puncture member 3 .

[0255] The setting of the puncture channel can bring different technical advantages. For example, if it is set inside the puncture member 3, the overall structure is more compact. Another example is that if it is set outside the puncture member 3, the two can move more independently and have good adaptability.

[0256] The following is combined with Figure 5a To Attachment Figure 5f , the specific working process of the interventional device in the center package 10 of this application is explained in detail by way of example:

[0257] Reference Figure 5aThe pericardial intervention device is attached to the pericardium 10 , and the key point is that the distal end of the sheath tube 1 is attached to the pericardium 10 .

[0258] Reference Figure 5b The sheath 1 of the pericardial intervention device rotates forward, and the pericardium 10 that is attached to the myocardium is stirred up through the receiving cavity 11, and the pericardium 10 is pre-fixed through the receiving cavity 11. In this process, whether the receiving cavity 11 is an open structure and whether the second cutting edge 115 is provided can achieve this function.

[0259] Reference Figure 5c The traction needle 2 punctures the pericardium 10. The traction needle 2 leaves the restraining tube 23 and enters the second state through the driving of the sheath handle 4, thereby fixing the pericardium 10 located near the receiving cavity 11.

[0260] Reference Figure 5d , lift the pericardium 10, and move the pericardium 10 away from the myocardium through the movement of the sheath 1, that is, lift the pericardium 10.

[0261] Reference Figure 5e The puncture member 3 punctures the pericardium 10, and the puncture member 3 is moved relative to the sheath tube 1 by the puncture handle 351 or by directly driving the puncture member 3 to achieve puncture at a preset position.

[0262] Reference Figure 5f , insert the guide wire 9, and insert the guide wire 9 through the catheter to facilitate subsequent treatment operations.

[0263] After the treatment is completed, the traction needle 2 is retracted into the restraint tube 23 and the first state through the driving of the sheath handle 4, so that the traction needle 2 and the pericardium 10 are separated; the sheath 1 of the pericardial intervention device rotates in the opposite direction, and the pericardium 10 in the receiving cavity 11 is released. At this time, the pericardial intervention device can be withdrawn away from the lesion.

[0264] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. When the technical features in different embodiments are embodied in the same figure, it can be regarded that the figure also discloses the combination examples of the various embodiments involved.

[0265] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A pericardium lifter, characterized in that: It comprises a sheath tube and a traction needle which is slidably matched with the sheath tube, a receiving cavity is arranged at the distal end of the sheath tube, the receiving cavity is open, the receiving cavity is provided with two opposite sides in the circumferential direction of the sheath tube, at least one side of the receiving cavity is provided with barbs, the barbs are adjacent to the open part of the receiving cavity, the barbs are arranged obliquely relative to the axis of the sheath tube, when the sheath tube moves relative to the pericardium, the pericardium enters the receiving cavity to achieve pre-fixation, and the traction needle can be switched between a first state and a second state during the sliding process, wherein in the first state the traction needle is attached to the sheath tube, and in the second state the distal end of the traction needle is deformed into a lifting hook which cooperates with the receiving cavity to achieve hooking of the pericardium; The receiving cavity is provided with a receiving area for receiving at least a portion of the pericardium; when the traction needle enters the second state from the first state, the distal end of the traction needle is located on a deformation path, and the deformation path passes through or is close to the receiving area.

2. The pericardium lifting device according to claim 1, characterized in that: The traction needle comprises: A rod portion, attached to the sheath; A hook portion, connected to the rod portion and switched between the first state and the second state by deformation, wherein the hook portion is deformed into a hook-shaped lifting hook in the second state; The traction needle further includes a restraining member for maintaining the hook portion in the first state.

3. The pericardium lifting device according to claim 2, characterized in that: The restraining member does not go beyond the receiving cavity.

4. The pericardium lifting device according to claim 1, characterized in that: When the traction needle moves from the first state to the second state, the distal end of the traction needle never exceeds the distal end of the sheath tube.

5. The pericardium lifting device according to claim 1, characterized in that: The receiving area extends in the axial direction of the sheath tube, and the length of the receiving area in the axial direction of the sheath tube is greater than the length of the receiving area in the circumferential direction of the sheath tube.

6. The pericardium lifting device according to claim 1, characterized in that: At least one side of the receiving cavity is provided with a retaining edge, and the retaining edge is used to retain the pericardium in the receiving cavity. At least one of the barbs and the retaining edge are located on the same side of the receiving cavity, and the two are connected end to end.

7. The pericardium lifting device according to claim 6, characterized in that: The side wall of the open portion is inclined to form an avoidance slope for the pericardium to enter the receiving area in the receiving cavity. The avoidance slope and the retaining edge are respectively located on both sides of the receiving cavity, and the two are arranged opposite to each other and the gap between them connects the receiving area and the open portion.

8. The pericardium lifting device according to claim 7, characterized in that: The barb is convex relative to the side where it is located, and its shape converges to form a second cutting edge. In the axial projection of the sheath tube, a vertical gap is provided between the second cutting edge and the starting point of the avoidance slope.

9. The pericardium lifting device according to claim 1, characterized in that: The pericardium lifting device further comprises a sheath handle, wherein the sheath handle comprises: A lower fixing member connected to the proximal end of the sheath tube; an upper fixing member connected to the lower fixing member; A force-applying member, movably mounted between the lower fixing member and the upper fixing member, wherein the interior of the force-applying member is hollow to form a driving chamber, and the interior of the sheath tube is communicated with the driving chamber; A driving member is movably installed in the driving chamber. The driving member moves under the action of the force-applying member and drives the traction needle to slide relative to the sheath tube.

10. A pericardial intervention device, comprising a pericardial lifting device and a pericardial puncture device according to any one of claims 1 to 9, wherein the pericardial puncture device comprises a puncture member, which is movably mounted on the sheath and has a puncture state moving toward the distal end and a retracted state moving toward the proximal end, and the puncture member in the puncture state is used to puncture the pericardium interacting with the traction needle.

11. The pericardial intervention device according to claim 10, characterized in that: The pericardiocentesis device also includes: A sleeve, wherein the piercing member is movably disposed in the sleeve; A puncture handle, on which the sleeve is mounted; Active part, movably mounted on the puncture handle; The driven member is connected to the piercing member and is driven by the active member to drive the piercing member to enter the piercing state or the retracted state.

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