CN216148153U - Pericardial interventional device - Google Patents

Abstract

The application discloses a pericardial interventional device, comprising: the pericardium lifting device comprises a sheath tube and a traction needle in sliding fit with the sheath tube, wherein an accommodating cavity is arranged at the far end of the sheath tube, when the sheath tube moves relative to the pericardium, the pericardium enters the accommodating cavity to realize pre-fixation, and the traction needle can be switched between a first state and a second state in the sliding process, wherein the traction needle is attached to the sheath tube in the first state, and the far end of the traction needle is deformed into a lifting hook mutually matched with the accommodating cavity in the second state so as to realize hooking of the pericardium; the pericardium puncture device is used for puncturing the pericardium interacted with the traction needle; wherein, the pericardium puncture device is used for limiting the depth of the pericardium puller inserted into the sheath. This application realizes the pericardium in the gathering of presetting the region through acceping the chamber, and the more stable realization of convenient traction needle is to the tractive of pericardium, avoids the damage to peripheral tissues such as myocardium, through the subsequent treatment of convenient realization of endoscope and threading passageway.

Description

Pericardial interventional device

Technical Field

The present application relates to the field of medical devices, and in particular to pericardial access devices.

Background

The heart comprises a ventricle, a heart muscle and a heart sac, wherein the ventricle is enclosed by the heart muscle, the heart sac is wrapped outside the heart muscle, and the heart muscle sequentially comprises a fiber layer, a wall layer and an internal organ layer from outside to inside, wherein the internal organ layer is also called as epicardium, a heart sac is arranged between the epicardium layer and the wall layer, and the heart sac usually contains 20-25ml of physiological fluid.

The existing epicardial stem cell injection technology comprises open chest to perform direct-view operation, the direct-view operation has the defects of large wound and slow recovery, and is a great test for the old, so the injection of stem cells into the pericardium through the minimally invasive operation becomes a preferable treatment means.

The medical apparatus adopted by the minimally invasive surgery is a pericardium puncture outfit, after the pericardium is cut by a tissue engagement needle on the pericardium puncture outfit, the medical apparatus enters the pericardium cavity along the pericardium puncture outfit, so that medical personnel can carry out the medical surgery of epicardium stem cell injection in the pericardium cavity.

Of course, the medical operation after the pericardium is incised by the pericardium puncture outfit is not limited to the epicardial injection of stem cells, and also includes medical operations such as puncture drainage, myocardial excision, ablation, biological patch placement, left atrial appendage ligation, and cardiac pacemaker placement.

The inventors have found that there is room for improvement in prior art pericardial access devices.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the application discloses a pericardium interventional device, which comprises a pericardium lifting device, wherein the pericardium lifting device comprises a sheath tube and a traction needle in sliding fit with the sheath tube, an accommodating cavity is arranged at the far end of the sheath tube, when the sheath tube moves relative to the pericardium, the pericardium enters the accommodating cavity to be pre-fixed, and the traction needle can be switched between a first state and a second state in the sliding process, wherein the traction needle is attached to the sheath tube in the first state, and the far end of the traction needle is deformed into a lifting hook mutually matched with the accommodating cavity to hook the pericardium in the second state;

the pericardium lifting device is also provided with a pericardium puncture device which is used for puncturing the pericardium interacted with the traction needle;

wherein, the pericardium puncture device is used for limiting the depth of the pericardium lifting device inserted into the sheath.

This application realizes the pericardium in the gathering of presetting the region through acceping the chamber, and the more stable realization of convenient traction needle is to the tractive of pericardium, avoids the damage to peripheral tissues such as myocardium, through the subsequent treatment of convenient realization of endoscope and threading passageway. Such as an endoscope disposed within the sheath and a threading channel through which the guidewire is threaded, in some embodiments, the endoscope may also be disposed within the threading channel.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, a containing area for containing at least a part of the pericardium is arranged in the containing cavity; the far end of the traction needle is positioned on a deformation path in the process of entering the second state from the first state, and the deformation path penetrates through or is close to the containing area.

When the deformation path of the traction needle passes through or is close to the containing area, the traction needle and the pericardium located in the containing area can interact with each other, so that the traction effect is achieved.

The technical scheme in the embodiment provides a brand-new idea. Those skilled in the art often desire to achieve grasping of the pericardium in one motion, and therefore strike a balance between reducing surrounding tissue damage and grasping strength. In the embodiment, two seemingly contradictory requirements are considered through sectional grabbing, weak grabbing is realized by the accommodating cavity, and the accommodating cavity is pre-fixed, so that subsequent operation is facilitated; the traction needle realizes strong grabbing on the basis of accommodating the cavity, and the sectional action takes safety and the requirement of grabbing strength into account.

Optionally, the deformation path extends from inside the sheath tube to outside the sheath tube through the housing area; or

The deformation path extends from the outside of the sheath tube to the inside of the sheath tube through the accommodating area.

The deformation path from the inside of the sheath to the outside of the sheath or from the outside of the sheath to the inside of the sheath can penetrate through the accommodating area, so that the traction is ensured to establish the mutual matching relation of the pericardium at the position, and the stability of the device is improved.

Optionally, during the process of the leading needle entering the second state from the first state, the distal end of the leading needle is everted compared with the axis of the sheath and passes through the accommodating area.

In the specific structure of deformation, the far end of the traction needle is a main component, and the pericardium in the containing area is punctured in the moving process, so that the stable lifting effect is realized.

Optionally, the traction needles and the accommodating cavities are arranged in groups, and a plurality of groups of traction needles and accommodating cavities are uniformly arranged in the circumferential direction of the sheath tube.

The traction needles and the accommodating cavities are in one-to-one correspondence, so that the pericardium part interacting with the sheath can be increased under the condition that the size of the sheath is fixed, and a better traction effect is achieved.

The application also discloses a pericardium puncture outfit, including pericardium among the above-mentioned technical scheme and carry and draw ware and pericardium puncture outfit, the pericardium puncture outfit includes the puncture piece, puncture piece movable mounting in the sheath just has towards the puncture state of distal end motion and the retraction state towards the near-end motion, puncture needle under the puncture state be used for the puncture with draw the pericardium of needle interact.

The pericardium is pulled by the pericardium pulling device to puncture the pericardium, and the puncturing operation is performed by the puncturing member.

Optionally, the puncture element includes a driving section extending from a distal end to a proximal end in the sheath and a puncture section disposed at a distal end of the driving section, and the driving section is movably engaged with the sheath and is configured to drive the puncture section into the puncture state or the retraction state.

The drive section movable mounting is in the sheath, with the traction needle in the above, can set up corresponding drive structure, when the traction needle with accept the chamber cooperation and accomplish the drawing back of pericardium, the puncture section can be stable realize the puncture of pericardium to carry out further treatment.

Optionally, the distal ends of the piercing sections converge to form a sharp portion for cutting the pericardium.

The sharp portion can realize the puncture to the pericardium, and the section of puncturing simultaneously can set up the passageway of intercommunication in order to set up other pipelines with the drive section, conveniently implements subsequent operation after the puncture.

Optionally, the puncturing section is a puncturing knife detachably mounted at the distal end of the driving section, and the distal ends of the puncturing knife are converged and furled to form a third cutting edge for cutting the pericardium.

The puncture knife can achieve a puncture effect different from that of a sharp part, and forms different shapes or sizes of pericardial puncture openings. Puncture sword detachable design can the adaptation with the scalpel in the current product etc. install to the pericardium puncture ware in this application in, improve the adaptability of device.

Optionally, the pericardial puncture device further comprises a guide tube fixed in the cannula, the guide tube is used for forming a guide channel, and at least part of the cannula can be inserted into the sheath tube.

The sleeve pipe can provide accommodating space for the puncture section, avoids causing the influence to pipeline on every side at the puncture section of intervention in-process. In different products, the cannula can be fixedly connected with the puncture handle or fixedly connected with the puncture handle.

Optionally, the puncture element is movably inserted into the casing, and the driving section is provided with a guide channel complementary to the shape of the insertion tube.

The guide channel can provide a limit for the relative movement or assembly of the puncture tube and the puncture element (especially the drive section), optimizing the arrangement of the internal components.

Optionally, the outer diameter of the driving section is slightly smaller than the inner diameter of the sleeve, the threading tube is mounted on the side wall of the sleeve, and the cross section of the guide channel is half-moon-shaped.

The driving section and the threading pipe are mutually matched to improve the assembly effect, reduce the internal clearance and improve the assembly effect.

Optionally, the pericardial puncture device further comprises a puncture handle, and the puncture handle comprises

A puncture handle to which the cannula is mounted;

the driving part is movably arranged on the puncture handle;

the driven part is connected with the driving section and driven by the driving part to drive the puncture section to enter the puncture state or the retraction state.

The puncture handle can realize the drive to the puncture piece thereby realize the stable puncture to the pericardium.

Optionally, the driving part is rotatably installed on a knob on the puncture handle, a first internal thread is arranged inside the driving part, the driven part is a transmission block, a first transmission rod and a first external thread matched with the first internal thread are arranged on the transmission block, and a first driving groove matched with the first transmission rod is arranged on the driving section.

The thread fit has better motion precision, and is convenient for controlling the motion of the puncture piece.

Optionally, the puncture handle include with bushing connection's lower seat and with lower seat threaded connection's upper seat, upper seat and lower seat inside cavity and intercommunication each other, the driving part is established movably the upper seat is last, the follower is located the upper seat with between the driving part, first guiding hole has been seted up on the lateral wall of upper seat, first transfer line passes first guiding hole inserts the drive section.

The first guide hole can provide a limit while guiding the transmission rod to move, and further provides a limit for the driving section and the puncture piece.

Optionally, the pericardium puncture outfit further comprises a length indicator, a second guide hole and a display panel are arranged on the lower seat, a second driving groove matched with the length indicator is formed in the driving section, the length indicator corresponds to the display panel, and the height position of the length indicator on the display panel is axially adjusted by the driving section, so that the display panel displays the length of the puncture piece extending out of the sleeve.

The matching of the length indicator and the second guide hole is the same as the matching of the first guide hole and the first transmission rod, and the length indicator and the second guide hole can be mutually reinforced; simultaneously with the display panel that the drive section directly links can realize stable indicating effect through succinct structure, the puncture piece motion accuracy of drive structure in this embodiment is high, puncture effectually.

Optionally, the pericardial retractor further includes a sheath handle connected to the sheath, the cannula is inserted into the sheath, the puncture handle may abut against the sheath handle, and the sheath handle includes:

the lower fixing piece is connected with the sheath tube;

the force application part is movably arranged on the lower fixing part;

and the driving piece is movably arranged on the force application piece, moves under the action of the force application piece and drives the traction needle to slide relative to the sheath tube.

The sheath tube handle can realize stable movement between the traction needle and the sheath tube, thereby accurately controlling the lifting and releasing of the pericardium.

Optionally, the sheath handle still include with last mounting that the mounting is connected down, force application part rotate install in down the mounting with go up between the mounting, the inside cavity of force application part forms the drive chamber, the driving piece install in the drive chamber, the near-end of sheath with down the mounting be connected and inside with the drive chamber intercommunication.

Through the arrangement of all parts, the internal compact arrangement of the sheath tube handle is realized, and better operation hand feeling and overall space performance of the sheath tube handle are provided.

Optionally, a first through hole for installing the sheath is formed in the lower fixing piece, a second through hole communicated with the driving chamber is formed in the upper fixing piece, a third through hole is formed in the driving piece, a pipeline in the sheath enters the driving chamber through the first through hole, and the third through hole and the second through hole extend to the proximal side of the sheath handle.

The arrangement of part of the pipeline penetrating through the sheath handle provides a structural basis for connecting other equipment with the pericardial puncture device in the application.

The application discloses device is intervene to pericardium, including the pericardium among the above-mentioned technical scheme and carry and draw the ware, the pericardium is carried and is gone up still to be equipped with the pericardium puncture ware, the pericardium puncture ware be used for puncture with the pericardium of traction needle interact.

The pericardium puller is used for pulling the pericardium, the pericardium puncture outfit is used for puncturing the pericardium, the endoscope can realize real-time observation of the treatment process, and the guide wire provides a foundation for subsequent treatment through the threading channel. For example, an endoscope and a threading channel through which a guide wire is threaded may be disposed within the sheath, and in some products, the endoscope may be disposed within the threading channel.

Optionally, the pericardial puncture device includes a puncture element, and the puncture channel is disposed inside or outside the puncture element.

The puncture channel can bring different technical advantages, for example, the whole structure is more compact when the puncture channel is arranged in the puncture piece, and the puncture channel and the puncture piece move more independently when the puncture channel is arranged outside the puncture piece, so that the puncture channel has good adaptability.

Specific advantageous technical effects will be further explained in conjunction with specific structures or steps in the detailed description.

Drawings

FIG. 1a is a schematic view of an embodiment of a pericardial lifter;

FIG. 1b is a schematic view of the distal end of the sheath of the pericardial puller of FIG. 1 a;

FIG. 1c is a schematic view of the distal end of the sheath of the pericardial retractor of FIG. 1a from another perspective;

FIG. 1d is a schematic view of an embodiment of a receiving chamber;

fig. 1e is a schematic view of the pericardial lifter of fig. 1a in a second state;

FIG. 1f is a schematic view of the distal end of the sheath of the pericardial puller of FIG. 1 e;

fig. 1g is another schematic view of the distal end of the sheath of the pericardial puller of fig. 1 e;

FIGS. 1h to 1m are schematic views of different embodiments of the accommodating cavity;

FIG. 2a is a schematic view of a pericardial puncture device according to an embodiment;

FIG. 2b is a schematic view of the distal end of the sheath of the pericardial puncture device of FIG. 2 a;

FIG. 2c is another schematic view of the distal end of the sheath of the pericardial puncture device in FIG. 2 a;

FIG. 2d is a schematic view of the internal structure of the distal end of the sheath of the pericardial puncture device in FIG. 2 a;

FIG. 2e is a schematic view of the pericardial puncture device in FIG. 2a in a second state;

FIG. 2f is a schematic view of the distal end of the sheath of the pericardial puncture device of FIG. 2 e;

FIG. 2g is another view of the distal end of the sheath of the pericardial puncture device in FIG. 2 e;

FIG. 3a is a schematic view of an embodiment of a piercing member;

FIG. 3b is a schematic view of another embodiment of a piercing member;

FIG. 3c is a schematic view of the distal end of the piercing member of FIG. 3 b;

FIG. 3d is a schematic view of the internal structure of the distal end of the puncturing element of FIG. 3 b;

FIG. 3e is a schematic view of the lancet puncturing handle of FIG. 3 b;

FIG. 3f is a cross-sectional view of the piercing handle of FIG. 3 e;

FIG. 3g is a schematic view of the interior structure of the piercing handle portion of FIG. 3 e;

FIG. 3h is a schematic view of the interior structure of the puncturing handle of FIG. 3 e;

FIG. 4a is a schematic view of the internal structure of the sheath handle according to an embodiment;

FIG. 4b is a schematic view of the sheath handle of FIG. 4a from another perspective;

FIG. 4c is another perspective view of the force applying member and the upper retaining member of FIG. 4 a;

FIG. 4d is a schematic view of the sheath handle of FIG. 4a in a second state;

FIG. 4e is a schematic view of the internal structure of the sheath handle of FIG. 4a in a first state;

FIG. 4f is a schematic view of the internal structure of the pericardial puncture device in a first state according to an embodiment;

FIG. 4g is a schematic view of the internal structure of the sheath handle of FIG. 4 f;

FIG. 4h is a schematic view of the sheath handle of FIG. 4g in a mated relationship;

FIG. 5a is a schematic view of an embodiment of an access device attached to a pericardium;

FIG. 5b is a schematic view of an embodiment of an access device agitating pericardium;

FIG. 5c is a schematic view of a pericardium fixation portion of an access device according to an embodiment;

FIG. 5d is a schematic view of a pericardium being lifted by an access device according to an embodiment;

FIG. 5e is a schematic view of an embodiment of an access device puncturing the pericardium;

fig. 5f is a schematic view of an embodiment of an interventional device implanted with a guidewire.

The reference numerals in the figures are illustrated as follows:

1. a sheath tube; 11. an accommodating cavity; 111. a barb; 112. an open site; 113. a housing area; 114. a retention lip; 115. a second cutting edge; 116. avoiding the inclined plane; 1161. a starting point; 1162. a terminal point; 117. a turning part;

2. a traction needle; 21. a rod portion; 22. a hook portion; 221. a first cutting edge; 23. a restraint tube;

3. a piercing member; 31. a drive section; 311. a guide channel; 312. a length indicator; 313. a second driving groove; 32. a piercing section; 33. a third cutting edge; 34. a sleeve; 351. a puncture handle; 3511. a lower seat; 3512. an upper seat; 3513. a first guide hole; 3514. a second guide hole; 3515. a display panel; 352. a driving member; 3521. a first internal thread; 353. a driven member; 3531. a first drive lever; 3532. a first drive slot; 36. a threading channel; 361. threading a guide pipe;

4. a sheath handle; 41. a lower fixing member; 411. a first through hole; 42. a force application member; 421. a second internal thread; 43. a drive member; 431. a third through hole; 432. a confinement groove; 44. an upper fixing member; 441. a second through hole; 442. a sealing plug; 45. a drive chamber; 451. a guide bar;

9. a guide wire;

10. the pericardium.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1a to 2g, the present application discloses a pericardial retractor, including a sheath 1 and a traction needle 2 slidably engaged with the sheath 1, wherein the traction needle 2 can be switched between a first state (refer to fig. 1a) and a second state (refer to fig. 1e) during sliding, wherein the traction needle 2 is attached to the sheath 1 in the first state, and the distal end of the traction needle 2 is deformed into a retractor for hooking the pericardium in the second state; a receiving cavity 11 adjacent to the lifting hook is arranged at the far end of the sheath tube 1.

According to the technical scheme in the embodiment, the pericardium is gathered in the preset area through the accommodating cavity 11, so that the pericardium can be conveniently pulled by the pulling needle 2 more stably, and the damage to peripheral tissues such as the myocardium is avoided.

Functionally, the receiving chamber 11 is used to collect the pericardium, and the traction needle 2 is used to pull up the pericardium. Referring to an embodiment, the traction needle 2 includes:

a rod part 21, which is attached to the sheath tube 1;

and the hook part 22 is connected with the rod part 21 and is switched between a first state and a second state through deformation, and the hook part 22 is deformed into a hook-shaped lifting hook in the second state.

The change of the traction needle 2 between the two states is mainly embodied as the change of the self-form, the change can be realized by changing the position of the traction needle 2 by a driving mechanism, or in an embodiment, the rod part 21 and/or the hook part 22 are elastic parts, and the elastic driving hook part 22 is kept in the second state under the action of the self elasticity;

the traction needle 2 further includes a restraint for holding the hook portion 22 in the first state.

The rod part 21 and/or the hook part 22 formed by the elastic part can realize the automatic switching between the first state and the second state, reduce the driving parts, and realize stable working effect by a simple mechanism in cooperation with the restraint part. Memory metal is a conventional choice of material for the pull pin 2 in the art, wherein the memory metal comprises nitinol.

The traction needle 2 can be switched between two states by changing the material property of the traction needle, and can also be switched by a driving mechanism. For example, in one embodiment, the constraining member is a constraining tube 23 disposed on the sheath tube 1, the constraining tube 23 extends from the distal end to the proximal end along with the sheath tube 1, and the rod portion 21 and the hook portion 22 are movably disposed in the constraining tube 23;

the hook part 22 in the second state protrudes out of the distal end of the restraint tube 23;

the hook portion 22 in the first state is accommodated in the restraint tube 23.

The sliding process of the traction needle 2 relative to the sheath tube 1 can be understood as the sliding process relative to the constraining tube 23, so that the switching of different states is realized, and meanwhile, the change of the far end position of the constraining tube 23 can also realize the change of the specific forming position and the forming path of the lifting hook. The restraining tube 23 drives the traction needle 2 to enter the first state by guiding the traction needle 2, and meanwhile, the restraining tube 23 can also accommodate the traction needle 2, so that the traction needle 2 is prevented from being influenced by surrounding pipelines or tissues in the intervention process.

In the arrangement of the restraint pipe 23, there are various options according to the pipeline arrangement inside the product and the use scene.

In the embodiment disclosed with reference to fig. 2b, the restraining tube 23 is applied to the inner side wall of the sheath 1. The constraining tube 23 is arranged in the sheath tube 1 to provide a smooth outer wall of the sheath tube 1, so that the intervention process is convenient to implement.

In the embodiment disclosed with reference to fig. 1b, the restraining tube 23 is applied to the outer side wall of the sheath 1. The placement of the constraint tube 23 outside the sheath 1 provides space for more lines within the sheath 1, providing a structural basis for complex procedures, particularly for embodiments that require multiple devices to enter the sheath 1. Meanwhile, the restraining tube 23 can increase the roughness and the surface area of the sheath surface, so that the contact area of the pericardium and the sheath and the winding force are increased.

In other embodiments, the constraining tube 23 is disposed within the sheath 1 sidewall. This arrangement is advantageous in that both the above embodiments are compatible, but there is a certain requirement for the wall thickness of the sheath 1, and accordingly, the mechanical properties of the sheath 1 are also affected to a certain extent.

The hook 22 in the second state has a plurality of independent arrangements with respect to the arrangement relationship between the constraining tube 23 and the sheath tube 1.

In the embodiment disclosed with reference to fig. 1g, the hook 22 in the second state extends from the constraining tube 23 away from the axis of the sheath 1. The arrangement extending away from the sheath axis enables the hook 22 to form a larger active area than the sheath diameter in the second state, especially when there are multiple hooks 22. The increase in the projected area of the hook 22 in the second state in the axial direction of the sheath 1 acts on a larger area of the pericardium, and the pulling effect is improved.

In other embodiments, the hook 22 in the second state extends from the constraining tube 23 toward the axis of the sheath tube 1. This arrangement can avoid the hook 22 in the second state from interfering with the surrounding tissue, but the extension toward the axis of the sheath 1 may interfere with the line of the device entering the human body along with the sheath 1. Therefore, different setting modes are adjusted according to different treatment cases, so that better treatment effect is obtained in a synergistic manner.

As a whole, referring to an embodiment, the lever portion 21 and/or the hook portion 22 are flexible members and are switched between the first state and the second state by relative movement with the sheath 1.

The flexible shaft 21 and/or the hook 22 can satisfy different technical requirements of the pull needle 2 in the first state and the second state. The flexibility here is in terms of relatively non-deformable rigidity, and therefore the flexibility here still needs to meet certain mechanical properties, in particular the mechanical property requirements of the hook portion 22 for the pulling operation of the pericardium.

The final purpose of the hook 22 is to lift the pericardium, so it needs to interact with the pericardium, and at a specific action site, referring to an embodiment, the distal end of the hook 22 is provided with a first cutting edge 221 capable of puncturing the pericardium.

The first cutting edge 221 is used to apply a force to the pericardium by the hook 22 to achieve lifting. In certain embodiments, the first cutting edge 221 punctures a portion of the pericardium to achieve a stable pull-up. In other embodiments, the first cutting edge 221 functions to improve the interaction between the hook 22 and the pericardium and is not limited to puncturing or puncturing the pericardium. For example, the first cutting edge 221 has a rough surface to interact with the pericardium, and especially after the pericardium is gathered and stacked in cooperation with the receiving cavity 11, the first cutting edge 221 can avoid damage to the pericardium.

The increase in the number of the pulling needles 2 can improve the effect of pulling the pericardium and ensure the stability of the operation. Therefore, in one embodiment, the plurality of the traction needles 2 are uniformly arranged in the circumferential direction of the sheath 1.

In the prior art, the pericardium attached to the myocardium needs to be pulled, and thus the myocardium is easily affected. Referring to an embodiment, the distal end of the retracting needle 2 is located on a deformation path during the process of the retracting needle 2 from the first state to the second state, and the deformation path is flush or retracted with respect to the distal end of the sheath 1.

In this embodiment, therefore, the arrangement of the accommodating cavity 11 can realize that the pericardium is pulled up under the condition that the deformation path of the traction needle 2 is flush or retracted compared with the distal end of the sheath tube 1, so as to avoid the damage of the traction needle 2 to the myocardium, and the arrangement can structurally avoid the operation problem of an operator, reduce the learning cost, and improve the adaptability.

In specific parts, referring to an embodiment, the lifting hook does not go beyond the distal end of the sheath 1.

The lifting hook is a part which actually interacts with the pericardium, and the lifting hook can avoid acting on the pericardium attached to the cardiac muscle under the matching of the accommodating cavity 11, so that the possibility of influencing the cardiac muscle is reduced. Particularly in embodiments where the lifting hook is provided with a corresponding piercing structure.

In combination with the specific location, the end surface of the distal end of the needle 2 is a location that is easy to affect the myocardium, and referring to an embodiment, the distal end of the needle 2 does not cross the distal end of the sheath 1 all the time from the first state to the second state.

The distal end of the needle 2 may be provided with a structure such as the first cutting edge 221 in order to lift the pericardium, and the pericardium attached to the myocardium is prevented from being affected by the arrangement not over the distal end of the sheath tube 1 in this embodiment.

From the view point of the motion track, referring to an embodiment, during the process from the first state to the second state, the deformation path of the distal end of the traction needle 2 does not cross the distal end of the sheath 1 at all times.

The deformation path of the distal end of the retracting 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 does not affect the tissue outside the distal end side of the sheath 1, thereby structurally preventing the retracting needle 2 from scratching the myocardium in the process from the first state to the second state.

With reference to fig. 1a to 2g, the present application discloses a pericardial retractor, which includes a sheath 1 and a traction needle 2 slidably engaged with the sheath 1, wherein the traction needle 2 can be switched between a first state and a second state during sliding, wherein the traction needle 2 is attached to the sheath 1 in the first state, and a distal end of the traction needle 2 is deformed into a retractor hook for hooking the pericardium in the second state; a receiving cavity 11 adjacent to the lifting hook is arranged at the far end of the sheath tube 1.

In this embodiment, the accommodating cavity 11 is open, two opposite sides of the accommodating cavity 11 are arranged in the circumferential direction of the sheath tube 1, at least one side of the accommodating cavity has a barb 111, the barb 111 is adjacent to the open portion 112 of the accommodating cavity 11, and the barb 111 is inclined with respect to the axis of the sheath tube 1.

The barb 111 can guide the pericardium into the housing cavity 11, and particularly when the pericardium moves relative to the barb 111, the movement is easily achieved by rotating the sheath tube 1 or the like. When the barb 111 is obliquely arranged relative to the axis of the sheath tube 1, the barb 111 can generate acting force far away from cardiac muscle to the pericardium acted by the barb 111, so that the pericardium is gathered, and the traction needle 2 is convenient to realize the next operation.

Functionally, the receiving cavity 11 can stir, even hook, and lift the pericardium, and the specific shape of the receiving cavity 11 may be changed in various ways, even in a hook shape (not shown), so that the function can be understood. The present application illustrates various ways shown in fig. 1d, 1h to 1 m.

The embodiment of fig. 1d differs from that of fig. 1h in the direction of extension of the receiving area 113, and a better lateral pericardial accumulation can be achieved in the embodiment of fig. 1h and 1i, and a better vertical pericardial accumulation can be achieved in the embodiment of fig. 1 d.

The embodiments of fig. 1j and 1l differ in the extension depth of the receiving areas 113 and the number of receiving areas 113, the embodiments of fig. 1l, 1m increasing the depth of the receiving areas 113 and decreasing the number of receiving areas 113, the embodiments of fig. 1j, 1k decreasing the depth of the receiving areas 113 and increasing the number of receiving areas 113.

In the following description, the accommodating cavity 11 in fig. 1d is taken as an example to explain the functions and design concepts of the structures in the accommodating cavity 11, and the accommodating cavities 11 in the other embodiments are the same and will not be described again.

The number of the housing areas 113 in the circumferential direction can be adjusted and changed accordingly, similarly to the form change. As embodied by the varying number of barbs 111.

The increased number of barbs 111 can improve the nesting and effectiveness of the housing 11 on the pericardium. In one embodiment, two opposite sides of the accommodating cavity 11 are provided with barbs 111, and the two barbs 111 have the same inclination tendency.

The two barbs 111 with the same inclination tendency can more conveniently realize the pericardium entering into the containing cavity 11, and the inclination tendency is understood as the inclined orientation rather than the inclined angle. The barb that the inclination trend is unanimous can realize the quick release of pericardium, for example when sheath pipe counter-rotation, the pericardium can break away from under the effect of barb and accept chamber 11, avoids releasing the in-process damage pericardium.

The receiving cavity 11 needs to gather the pericardium to a small extent in addition to the pericardium so as to facilitate the interaction of the traction needle 2 with the pericardium. In one embodiment, a receiving area 113 for receiving at least a portion of the pericardium is disposed in the receiving cavity 11, and the receiving area 113 extends in the axial direction of the sheath 1.

The receiving area 113 can retain the pericardium entering the receiving cavity 11 in the receiving cavity 11 and achieve a certain gathering or stacking. In a specific arrangement of the housing area 113, referring to an embodiment, the housing area 113 and the opening portion 112 are in staggered communication in the circumferential direction of the sheath 1.

The receiving area 113 and the open part 112 which are in staggered communication in the circumferential direction can prevent the pericardium entering the receiving area 113 from automatically separating from the receiving cavity 11, and the restraining capability of the receiving cavity 11 on the pericardium is improved.

In an implementation in which the pericardium is held in a certain position, other structures may be provided in addition to the housing area 113. Referring to an embodiment, the receiving cavity 11 is open, and the receiving cavity 11 is provided with two opposite sides on the circumference of the sheath 1, wherein at least one side is provided with a retaining edge 114, and the retaining edge 114 is used for retaining the pericardium in the receiving cavity 11.

The retaining rim 114 can provide a constant driving effect on the pericardium to increase the ability of the receiving cavity 11 to restrain the pericardium.

The receiving chamber 11 can achieve pre-fixing of the pericardium, in addition to the above-described accumulation of the pericardium. Referring to one embodiment, the barbs 111 are relatively convex with respect to the sides and converge in shape to form a second cutting edge 115.

The second cutting edge 115 is used to apply a force to the pericardium by the barbs 111 to achieve pre-fixation. In certain embodiments, the second cutting edge 115 punctures a portion of the pericardium to achieve a stable pull-up. In other embodiments, the second cutting edge 115 is provided with a friction-increasing retaining structure. The arrangement mode is to overcome the technical problem that the pericardium is easy to separate from the second cutting edge in the process of pulling or puncturing the pericardium by the puncturing piece. Accordingly, in some embodiments, the second cutting edge 115 is provided as a friction enhancing retention feature. This structure serves to improve the interaction between the hook portion 22 and the pericardium, reducing the effect on the pericardium. The retention structure can provide good fixation while reducing damage to the pericardium, for example, by the rough surface interacting with the pericardium, particularly after the gathering and stacking of the pericardium with the barbs 111.

In the embodiment disclosed with reference to fig. 1d, at least one of the barbs 111 and the retaining rim 114 are located on the same side of the receiving cavity 11, and they are connected end to end.

The arrangement, which shows the barbs 111 and retaining rim 114 on the left side of the figure end to end, enables a seamless guidance of the pericardium, thereby ensuring a stable positioning of the pericardium into the receiving cavity 11. Similarly, in the other side of the figure, the side wall of the open portion 112 is obliquely arranged to form an avoiding inclined surface 116 for the pericardium to enter the accommodating area 113 in the accommodating cavity 11, at least one of the barbs 111 and the avoiding inclined surface 116 are located on the same side of the accommodating cavity 11, and the two are connected end to end.

The avoiding inclined plane 116 plays a role of guiding while avoiding, and cooperatively realizes the movement of the pericardium in the accommodating cavity 11; meanwhile, the avoiding inclined plane 116 reserves space for the pericardium to enter the open area and the accommodating area 113,

in one embodiment, the avoiding slope 116 and the retaining edge 114 are respectively located at two sides of the receiving cavity 11, and the avoiding slope and the retaining edge are arranged oppositely, and a gap between the avoiding slope and the retaining edge communicates with the receiving area 113 and the opening portion 112.

The avoidance ramp 116 and retention rim 114 cooperate to guide and position the pericardium into the open space.

In the mutual positional relationship, referring to an embodiment, on the axial projection of the sheath, the second cutting edge 115 is located between the start point 1161 and the end point 1162 of the avoiding inclined plane 116, and a vertical gap D1 is provided between the second cutting edge 115 and the start point 1161 of the avoiding inclined plane 116.

The vertical clearance provides a release space for the movement of the pericardium, so that the pericardium can be more easily entered into the accommodating area 113 under the matching of the barb 111 and the second cutting edge 115, and the pericardium can be grabbed by the traction needle.

In one embodiment, the retaining edge 114 is provided with a turning portion 117, and the turning portion 117 is located between the starting point 1161 and the ending point 1162 of the avoiding slope 116 on the projection of the sheath in the circumferential direction.

The position relation of the turning part 117 and the avoiding inclined plane 116 can realize the uninterrupted guidance of the accommodating port on the movement of the pericardium, thereby improving the grabbing effect of the pericardium by the accommodating port.

In order to avoid the influence on the myocardium, similar to the traction needle 2, in an embodiment, the distal end of the second cutting edge 115 is flush or retracted compared to the sheath 1.

Compared with the second cutting edge 115 which is flush or retracted at the far end of the sheath tube 1, the tissue after the pericardium can be prevented from being influenced, and unnecessary damage can be avoided.

The increase in the number of the housing chambers 11 can improve the pre-fitting ability to the pericardium, thereby providing a more stable pulling-fit effect to the traction needle 2. In one embodiment, the accommodating cavities 11 are uniformly arranged in the circumferential direction of the sheath tube 1.

With reference to fig. 1a to 2e, the present application discloses a pericardial retractor, which includes a sheath 1 and a traction needle 2 slidably engaged with the sheath 1, wherein the traction needle 2 can be switched between a first state and a second state during sliding, wherein the traction needle 2 is attached to the sheath 1 in the first state, and a distal end of the traction needle 2 is deformed into a retractor hook for hooking the pericardium in the second state; a receiving cavity 11 adjacent to the lifting hook is arranged at the far end of the sheath tube 1.

In this embodiment, a receiving area 113 for receiving at least a part of the pericardium is arranged in the receiving cavity 11; the far end of the traction needle 2 is located on a deformation path in the process of the traction needle 2 entering the second state from the first state, and the deformation path passes through or is close to the accommodating area 113.

When the deformation path of the traction needle 2 passes through or is close to the accommodating area 113, the deformation path interacts with the pericardium in the accommodating area 113, so that the traction effect is achieved, compared with the prior art, the matching mode can effectively avoid the effect of the traction needle 2 on the pericardium outside the accommodating port, compared with the prior art that the traction needle directly operates the pericardium attached to the myocardium in the prior art, the implementation mode in the embodiment can effectively protect surrounding tissues and reduce injuries.

The traction needle 2 interacts with the pericardium in the receiving area 113 in a number of ways. For example, in the embodiment disclosed in fig. 2f, the deformation path extends from inside the sheath 1 to outside the sheath 1 through the accommodating area 113; for example, in the embodiment disclosed in fig. 1f, the deformation path extends from the outside of the sheath 1 to the axis of the sheath 1 through one side of the accommodating area 113; for another example, in other embodiments, the deformation path extends from the outside of the sheath 1 to the inside of the sheath 1 through the accommodating area 113; for another example, in another embodiment, the deformation path extends from the inside of the sheath 1 to the axis of the sheath 1 through one side of the receiving area 113

The penetration of the accommodating area 113 from the inside of the sheath tube 1 to the outside of the sheath tube 1 or from the outside of the sheath tube 1 to the inside of the sheath tube 1 can be realized, so that the establishment of the mutual matching relation of the traction needle 2 to the pericardium at the position is ensured, and the stability of the device is improved; the deformation path through one side of the receiving area 113 can avoid causing excessive damage to the pericardium. Abundant setting mode can cooperate the nimble setting of first blade 221 to provide better adaptability, provides better treatment.

From the viewpoint of stable pulling effect, referring to an embodiment, during the process of the traction needle 2 entering the second state from the first state, the distal end of the traction needle 2 is everted compared to the axis of the sheath 1 and passes through the housing area 113.

In the specific structure of the deformation, the far end of the traction needle 2 is a main component, and the pericardium in the containing area 113 is punctured in the moving process, so that the stable lifting effect is realized.

The traction needles 2 and the accommodating cavities 11 are in one-to-one correspondence, so that the pericardium part interacting with the sheath 1 can be increased under the condition that the size of the sheath is fixed, and a better traction effect is achieved. Referring to an embodiment, the traction needles 2 and the accommodating cavities 11 are arranged in groups, and a plurality of groups of traction needles 2 and accommodating cavities 11 are uniformly arranged in the circumferential direction of the sheath 1.

With reference to fig. 1a to 4h, the present application also discloses a pericardial puncture device, at least part of which is insertable into the sheath 1, for puncturing the pericardium interacting with the traction needle 2, wherein the pericardial puncture device is used for limiting the depth of insertion of the pericardial puller into the sheath 1. The pericardial puncture device comprises a puncture element 3, wherein the puncture element 3 is movably arranged on the sheath tube 1 and has a puncture state moving towards the far end and a retraction state moving towards the near end, and the puncture needle in the puncture state is used for puncturing the pericardium interacted with the traction needle 2.

The pericardium is pulled up by the pericardium puller in order to puncture the pericardium, and the puncturing operation is performed by the puncturing tool 3.

In the implementation of the puncturing element 3, referring to an embodiment, the puncturing element 3 comprises a driving section 31 extending from the distal end to the proximal end in the sheath 1 and a puncturing section 32 disposed at the distal end of the driving section, wherein the driving section 31 is movably engaged with the sheath 1 and is used for driving the puncturing section 32 into a puncturing state or a retracted state.

The driving section is movably arranged in the sheath tube 1, and can be provided with a corresponding driving structure in the same way as the traction needle 2, and after the traction needle 2 and the accommodating cavity 11 are matched to complete the lifting and pulling of the pericardium, the pericardium can be stably punctured by the puncturing section 32, so that a further treatment process can be carried out.

Different designs of the piercing member 3 can meet different treatment requirements. In the embodiment disclosed with reference to fig. 3a, the distal ends of the piercing section 32 converge to form a sharp for cutting the pericardium.

The sharp portion can realize the puncture to the pericardium, and puncture section 32 and drive section can set up the passageway of intercommunication in order to set up other pipelines simultaneously, conveniently implements subsequent operation after the puncture.

In the embodiment disclosed with reference to fig. 3b to 3d, the puncturing section 32 is a puncturing blade detachably mounted on the distal end of the driving section 31, and the distal ends of the puncturing blade converge to form a third cutting edge 33 for cutting the pericardium.

The puncture knife can achieve a puncture effect different from that of a sharp part, and forms different shapes or sizes of pericardial puncture openings. Puncture sword detachable design can the adaptation with the scalpel in the current product etc. install to the pericardium puncture ware in this application in, improve the adaptability of device.

In the embodiment disclosed with reference to fig. 3c, the pericardial puncture device further includes a sleeve 34, the sleeve 34 is disposed inside the sheath 1, and the puncture element 3 is movably disposed inside the sleeve 34 during the intervention of the puncture element 3, which may affect the surrounding pipeline. The cannula 34 can provide a receiving space for the puncture section 32, and the puncture section 32 is prevented from influencing the surrounding pipeline in the interventional procedure.

In further normalizing the internal line of the cannula 34, the piercing member 3 is movably arranged in the cannula 34, and the driving portion 31 is provided with a guiding passage 311 having a shape complementary to that of the penetration tube 361, in accordance with an embodiment.

The guide channel 311 can provide a stop for relative movement or assembly of the penetrating tube 361 and piercing member 3 (and in particular the drive section 31), optimizing internal component placement. The function of the guide channel 311 will also vary according to the different arrangements of the different lead-through tubes 361 relative to the cannula 34. The guide channel 311 can function to guide the movement of the drive section 31, for example, when the lead tube 361 is fixed relative to the cannula 34; further, for example, when the lead tube 361 is moved relative to the cannula 34, the guide channel 311 can function to synchronize the movement of the driver section 31 and the lead tube 361.

In the specific form of the guiding channel 311, referring to an embodiment, the outer diameter of the driving section 31 is slightly smaller than the inner diameter of the sleeve 34, the threading tube 361 is installed on the side wall of the sleeve 34, and the cross-sectional shape of the guiding channel 311 is half-moon-shaped.

The driving section 31 and the threading tube 361 are matched with each other to improve the assembly effect, and the guide channel 311 with the half-moon-shaped section can fill the inner space of the threading guide tube 34, so that the inner gap of the threading guide tube 34 is reduced, and the assembly effect is improved.

Referring to an embodiment, the pericardial puncture device further includes a puncture handle 351, and the puncture handle 351 includes: a puncture handle 351, wherein the cannula 34 is mounted on the puncture handle 351; an active member 352 movably mounted on the puncture handle 351; a follower 353 connected to the driving section 31 and driven by the follower 352 to drive the puncturing section 32 into a puncturing state or a retracted state.

The puncture handle 351 can drive the puncture element 3 to stably puncture the pericardium. The driving member 352 moves the driven member 353 during movement, thereby effecting movement of the drive segment relative to the sleeve 34. A

In driving relation, referring to an embodiment, the driving member 352 is a knob rotatably mounted on the puncture handle 351, and a first internal thread 3521 is formed therein, and the driven member 353 is engaged with the first internal thread 3521 for movement. The follower 353 is a transmission block, the transmission block is provided with a first transmission rod 3531 and a first external thread (not numbered) matched with the first internal thread 3521, and the driving section 31 is provided with a first driving groove 3532 matched with the first transmission rod 3531. The thread fit has better motion precision, and is convenient for controlling the motion of the puncture piece. The first driving grooves 3532 are radially formed, so that the motion relationship between the driving section 31 and the first driving rod 3531 can be better synchronized.

Structurally, referring to an embodiment, the puncture handle 351 includes a lower seat 3511 connected to the cannula 34 and a detachably mounted upper seat 3512, the upper seat 3512 and the lower seat 3511 are hollow and are communicated with each other, the driving member 352 is movably sleeved on the upper seat 3512, the driven member 353 is located between the upper seat 3512 and the driving member 352, a first guiding hole 3513 is formed in a side wall of the upper seat 3512, and the driving section 31 is connected to the driven member 353 through the first guiding hole 3513. The first guide hole 3513 provides a movement limit while guiding the movement of the driving section 31 and the follower 353. The lower base 3511 is provided with a second guide hole 3514, and the driving section 31 is provided with a display panel 3515 disposed in the second guide hole 3514. Display panel 3515 is used for cooperating with lower seat 3511 and indicates the 3 motion strokes of piercing depth, makes things convenient for operating personnel to control the length that the piercing depth stretches out the sleeve pipe, cooperates the endoscope to observe the concrete progress of puncture to realize accurate control. Specifically, referring to an embodiment, the pericardial puncture device further includes a length indicator 312, the driving section 31 is provided with a second driving groove 313 matched with the length indicator 313, the length indicator 313 corresponds to the display panel 3515, and the driving section 31 axially adjusts the height position of the length indicator 312 on the display panel 3515, so that the display panel 3515 displays the length of the puncture piece 3 extending out of the cannula 34.

The matching of the length indicator and the second guide hole is the same as the matching of the first guide hole and the first transmission rod, and the length indicator and the second guide hole can be mutually reinforced; meanwhile, the display panel directly connected with the driving section can realize a stable indicating effect through a simple structure.

With reference to fig. 4a to 4h, the present application further discloses a pericardial puncture device, including the pericardial lifting device and the pericardial puncture device in the above technical solutions, the pericardial puncture device includes a puncture element 3, the puncture element 3 is movably mounted on the sheath tube 1 and has a puncture state moving towards the distal end and a retraction state moving towards the proximal end, and the puncture needle in the puncture state is used for puncturing the pericardium interacting with the traction needle 2.

In this embodiment, the pericardial retractor further includes a sheath handle 4 connected to the sheath 1, and the puncture handle 351 may abut against the sheath handle 4 after the cannula 34 is inserted into the sheath 1.

The sheath handle 4 includes: a lower fixing member 41 connected to the sheath tube 1; an urging member 42 movably mounted on the lower fixing member 41; and the driving piece 43 is movably arranged on the force application piece 42, and the driving piece 43 moves under the action of the force application piece 42 and drives the traction needle 2 to slide relative to the sheath 1.

The sheath tube handle 4 can realize stable movement between the traction needle 2 and the sheath tube 1, thereby accurately controlling the lifting and releasing of the pericardium. In terms of transmission relation, referring to an embodiment, the force applying member 42 is a rotating member rotatably mounted on the lower fixing member 41 and internally provided with a second internal thread 421, and the driving member 43 is provided with a second external thread (not numbered) which is matched with the second internal thread 421 to realize axial movement.

In terms of spatial structure, referring to an embodiment, the sheath handle 4 further includes an upper fixing member 44 connected to the lower fixing member 41, the force application member 42 is rotatably installed between the lower fixing member 41 and the upper fixing member 44, the force application member 42 is hollow inside to form a driving chamber 45, the driving member 43 is installed inside the driving chamber 45, the proximal end of the sheath 1 is connected to the lower fixing member 41, and the inside is communicated with the driving chamber 45.

Through the arrangement of each part, the internal compact arrangement of the sheath tube handle 4 is realized, and better operation hand feeling and overall space performance of the sheath tube handle 4 are provided.

The driving chamber 45 provides a relatively closed space for the movement of the driving member 43, and in order to improve the stability of the movement of the driving member 43, compared with the embodiment disclosed in fig. 4a and 4g, a guide bar 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 bar 451. The guide bar 451 can guide the movement of the driving member 43 to provide a more stable driving effect of the traction needle 2. The guide bar 451 extends through the driving member 43 in a fitting relationship.

In the mating relationship of the pull-off needle 2 and the drive element 43, reference is made to an embodiment in which the proximal end of the pull-off needle 2 is bent over onto the proximal end face of the drive element 43. During the movement of the driving member 43, the transmission can be realized through the end surfaces of the two which are mutually abutted. For stability improvement, a proximal end surface of the driving member 43 is provided with a restraining groove 432 for attaching the proximal end of the traction needle 2.

In terms of communication, in an embodiment, the lower fixing member 41 is provided with a first through hole 411 for installing the sheath tube 1, the upper fixing member 44 is provided with a second through hole 441 communicated with the driving chamber 45, the driving member 43 is provided with a third through hole 431, and a pipeline in the sheath tube 1 enters the driving chamber 45 through the first through hole 411 and extends to the proximal end side of the sheath tube handle 4 through the third through hole 431 and the second through hole 441.

The arrangement of part of the line through sheath handle 4 provides a structural basis for the connection of other devices to the pericardial puncture device of the present application. In order to realize a more closed driving chamber 45, the sheath tube 1 is in sealing fit with the first through hole 411, the second through hole 441 is provided with a sealing plug 442, and the sealing plug 442 is provided with a pipeline hole (not numbered) for a pipeline to pass through.

It is obvious that, as the position relationship between the restriction tube 23 and the sheath tube 1 changes, the mounting position of the proximal end side of the sheath tube 1 can also change correspondingly, and compared with the embodiment shown in fig. 4d and 4g, when the restriction tube 23 is disposed outside the sheath tube 1, the traction needle 2 can be conveniently engaged with the restriction groove 432, so that the sheath tube 1 can extend to the vicinity of the sealing plug 442, and the fixing effect of the sheath tube 1 is improved correspondingly.

With reference to fig. 1a to 5f, the present application discloses a pericardial access device, which includes the pericardial puller in the above technical solution, and a pericardial puncture outfit is further provided on the pericardial puller, and is used for puncturing the pericardium interacting with the traction needle 2; the sheath tube 1 is provided with an endoscope and a threading channel 36 for threading a guide wire.

The pericardium puller is used for pulling the pericardium, the pericardium puncture device is used for puncturing the pericardium, the endoscope can realize real-time observation of the treatment process, and the guide wire provides a foundation for subsequent treatment through the threading channel 36.

Referring to one embodiment, the pericardial puncture device includes a puncture element 3, and a puncture channel 36 is provided inside the puncture element 3 or outside the puncture element 3. The puncture channel can bring different technical advantages, for example, the whole structure is more compact when the puncture channel is arranged in the puncture piece 3, and the motion of the puncture channel and the motion of the puncture piece 3 are more independent and the adaptability is good.

The specific operation of the pericardium 10 interventional device in the present application will be specifically explained in the following with reference to fig. 5a to 5 f:

referring to fig. 5a, the pericardial puncture device is attached to the pericardium 10, with emphasis on the distal side of the sheath 1 being attached to the pericardium 10.

Referring to fig. 5b, the sheath 1 of the pericardium puncture outfit rotates forward, the pericardium 10 attached to the myocardium is stirred up by the accommodating cavity 11, and the pericardium 10 is pre-fixed by the accommodating cavity 11, in this process, whether the accommodating cavity 11 is an open structure and whether the second cutting edge 115 is provided can achieve this function.

Referring to fig. 5c, the traction needle 2 pierces the pericardium 10, and the traction needle 2 leaves the restriction tube 23 and enters the second state by being driven by the sheath tube handle 4, so as to fix the pericardium 10 near the accommodation cavity 11;

referring to fig. 5d, the pericardium 10 is lifted, and the pericardium 10 is separated from the myocardium by the movement of the sheath tube 1, that is, the pericardium 10 is lifted.

Referring to fig. 5e, the pericardium 10 is punctured by the puncturing element 3, and the puncturing handle 351 or the puncturing element 3 is directly driven to move the puncturing element 3 relative to the sheath 1 to puncture the preset position.

Referring to fig. 5f, the guide wire 9 is inserted, and the guide wire 9 is inserted through the threading guide, thereby facilitating the subsequent treatment operation.

After the treatment is finished, the traction needle 2 retracts into the restraint tube 23 and is in a first state by the driving of the sheath tube handle 4, so that the traction needle 2 is separated from the pericardium 10; the sheath tube 1 of the pericardium puncture instrument rotates reversely, the pericardium 10 in the containing cavity 11 is released, and the pericardium puncture instrument can be withdrawn away from the focus.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims (10)

1. A pericardial access device, comprising:

the pericardium lifting device comprises a sheath tube and a traction needle in sliding fit with the sheath tube, wherein an accommodating cavity is formed in the far end of the sheath tube, when the sheath tube moves relative to the pericardium, the pericardium enters the accommodating cavity to be pre-fixed, and the traction needle can be switched between a first state and a second state in the sliding process, wherein the traction needle is attached to the sheath tube in the first state, and the far end of the traction needle is deformed into a lifting hook matched with the accommodating cavity to hook the pericardium in the second state;

a pericardial puncture device, at least part of which can be inserted into the sheath, for puncturing the pericardium interacting with the traction needle;

wherein, the pericardium puncture device is used for limiting the depth of the pericardium lifting device inserted into the sheath.

2. The pericardial access device of claim 1, wherein the pericardial puncture instrument includes a puncture member movably mounted to the sheath and having a puncture state of distal movement and a retracted state of proximal movement, the puncture member in the puncture state being used to puncture the pericardium interacting with the pull needle;

the puncture piece comprises a driving section extending from the far end to the near end in the sheath and a puncture section arranged at the far end of the driving section, and the driving section is movably matched with the sheath and is used for driving the puncture section to enter the puncture state or the retraction state.

3. The pericardial access device of claim 2, wherein the puncturing section is a puncturing blade detachably mounted on the distal end of the driving section, the distal end of the driving section is provided with a mounting platform for mounting the puncturing blade, and the distal ends of the puncturing blade converge to form a third cutting edge for cutting the pericardium.

4. The pericardial access device of claim 2, wherein the pericardial puncture instrument further comprises:

the puncture piece is movably arranged in the sleeve in a penetrating way;

a puncture handle to which the cannula is mounted;

the driving part is movably arranged on the puncture handle;

the driven part is connected with the driving section and driven by the driving part to enable the puncture section to enter the puncture state or the retraction state.

5. The pericardial access device of claim 4, wherein the pericardial puncture apparatus further comprises a guide tube fixed in the cannula, the guide tube is used for forming a guide channel, and a guide channel with a shape complementary to that of the guide tube is arranged on the driving section.

6. The pericardial interventional device according to claim 4, wherein the driving member is a knob rotatably mounted on the puncture handle, a first internal thread is provided inside the knob, the driven member is a transmission block, the transmission block is provided with a first transmission rod and a first external thread engaged with the first internal thread, and the driving section is provided with a first driving groove engaged with the first transmission rod.

7. The pericardial access device according to claim 6, wherein the puncturing handle includes a lower seat connected to the cannula and an upper seat screwed to the lower seat, the upper seat and the lower seat are hollow and communicated with each other, the driving member is movably sleeved on the upper seat, a first guide hole is formed in a sidewall of the upper seat, and the first transmission rod is inserted into the driving section through the first guide hole.

8. The pericardial access device according to claim 7, wherein the pericardial puncture device further includes a length indicator, the lower seat is provided with a second guide hole and a display panel, the driving section is provided with a second driving groove matched with the length indicator, the length indicator corresponds to the display panel, and the driving section axially adjusts a height position of the length indicator on the display panel so that the display panel displays a length of the puncture member extending out of the cannula.

9. The pericardial access device of claim 4, wherein the pericardial retractor further comprises a sheath handle connected to the sheath, and wherein the puncture handle abuts the sheath handle after the cannula is inserted into the sheath.

10. The pericardial access device of claim 1, wherein the distal end of the traction needle does not pass over the distal end of the sheath at all times during the first state to the second state.

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