CN210750525U

CN210750525U - Heart auxiliary instrument

Info

Publication number: CN210750525U
Application number: CN201921531575.0U
Authority: CN
Inventors: 任燕龙; 鲍磊; 刘文娴; 孔晴宇
Original assignee: Beijing Anzhen Hospital
Current assignee: Beijing Anzhen Hospital
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2020-06-16
Anticipated expiration: 2029-09-12

Abstract

The utility model discloses a heart auxiliary instrument, which comprises a catheter and a plurality of supporting leaves, wherein each supporting leaf comprises a shell and a flexible bag, the flexible bag is connected with a medium pumping and injecting device through a connecting pipe, the flexible bag is arranged on the shell, and after a medium is injected, the flexible bag can expand and at least partially expose outside the shell; the heart-pericardium guiding device comprises a catheter, and is characterized by further comprising a guiding mechanism and a pushing mechanism, wherein the guiding mechanism is used for guiding the catheter to be inserted into a pericardium, the pushing mechanism can drive each supporting leaf to move along the catheter and extend out of the catheter, the shell is made of memory alloy, and in the extending state, each supporting leaf can be unfolded to cover the heart or a specific ventricle. The utility model provides a heart auxiliary instrument can assist heart or specific ventricle to beat, and then can carry out the adjunctie therapy to heart failure's patient, strives for the time for the heart transplantation art.

Description

Heart auxiliary instrument

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to a heart auxiliary instrument for treating heart failure.

Background

The heart failure is called heart failure for short, which means that the venous return blood volume cannot be sufficiently discharged out of the heart due to the dysfunction of the systolic function and/or the diastolic function of the heart, so that the blood in the venous system is silted up, the blood in the arterial system is not perfused enough, and the cardiac circulatory disorder syndrome is caused, the morbidity of the heart failure is increased year by year along with the increase of the age, and the life safety of people is seriously influenced.

At present, heart transplantation is one of the most effective methods for treating end-stage heart failure, the survival rate of end-stage heart failure patients can be obviously improved, the survival rate of the end-stage heart failure patients can be expected to reach 85% in 1 year, however, heart donors are in short supply, and many patients cannot find suitable hearts at all, so that the chances of saving lives are missed.

Therefore, how to provide a solution to treat or alleviate heart failure and thus to strive for time for heart transplantation remains a technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a heart auxiliary instrument can assist heart or specific ventricle to beat, and then can carry out the adjunctie therapy to heart failure's patient, strives for the time for heart transplantation art.

In order to solve the technical problem, the utility model provides a heart assist device, which comprises a catheter and a plurality of support leaves, wherein each support leaf comprises a shell and a flexible bag, the flexible bag is connected with a medium pumping and injecting device through a connecting pipe, the flexible bag is arranged on the shell, and after a medium is injected, the flexible bag can expand and is at least partially exposed outside the shell; the heart-pericardium guiding device comprises a catheter, and is characterized by further comprising a guiding mechanism and a pushing mechanism, wherein the guiding mechanism is used for guiding the catheter to be inserted into a pericardium, the pushing mechanism can drive each supporting leaf to move along the catheter and extend out of the catheter, the shell is made of memory alloy, and in the extending state, each supporting leaf can be unfolded to cover the heart or a specific ventricle.

When the heart failure treatment device is used, the catheter can be inserted into a pericardium through the guide mechanism, then the support leaves are pushed out of the catheter through the pushing mechanism, the shell of the support leaves is made of memory alloy, after the support leaves are stretched out of the catheter, the shell can be restored to the original shape to coat the whole heart or a specific ventricle, then a medium can be injected and extracted into the flexible bag through the medium pumping and injecting device to drive the flexible bag to expand and contract, so that the heart or the specific ventricle can be assisted to beat, the heart failure patient can be assisted to be treated, the service life of the end-stage heart failure patient can be effectively prolonged, and more time is strived for a heart transplantation operation.

Optionally, in the extended state, each of the support leaves extends completely out of the conduit.

Optionally, a chuck is arranged at one end of the catheter implanted into the human body, the chuck is provided with a plurality of guide channels which penetrate along the axial direction and are distributed at intervals along the circumferential direction, and the number of the guide channels is the same as that of the support leaves; in the extended state, the support blades extend out of the corresponding guide channels in a one-to-one correspondence manner, and the tail portions of the support blades are retained in the corresponding guide channels.

Optionally, each of the support blades is mounted to the guide tube, and in the retracted state, each of the support blades is sequentially arranged in the guide tube along the axial direction.

Optionally, the longitudinal ends of the housing are closed, the side wall is provided with an opening, a chamber is arranged in the housing, and the transverse and/or longitudinal dimension of the chamber is larger than the opening; a portion of the flexible bladder is positioned within the chamber and another portion extends out of the chamber from the opening.

Optionally, the mouth wall of the opening is provided with a flanging, and the flanging is in smooth transition with the side wall.

Optionally, the flexible bladder comprises a first bladder and a second bladder in communication, the first bladder being located within the chamber and the second bladder being located outside the housing; and in the medium injection state, the second balloon can be expanded, and the expanded second balloon is wavy in the extending direction of the support leaves so as to form a plurality of spaced bulge structures.

Optionally, the contact surface of the flexible bags and the heart or the specific ventricle is provided with a suction cup, and each flexible bag comprises a plurality of bulge structures which can bulge after being filled with a medium.

Optionally, the medium pumping and injecting device is arranged outside the conduit, and the pumped and injected medium is gas or liquid; the guiding mechanism comprises a puncture needle, a guide wire and an expansion sheath tube.

Optionally, the clamp further comprises a body and a locking portion, the body is sleeved on the catheter and can slide along the catheter, and the locking portion can lock the body to the catheter.

Optionally, a drug injection tube is further included, the drug injection tube being insertable into the pericardium along the catheter; the outer wall of the conduit is also connected with a standby branch pipe, and when the conduit is used, the standby branch pipe is positioned outside a human body.

Optionally, the catheter is inserted into the body through the chest wall.

Drawings

FIG. 1 is a schematic view of the structure of the supporting leaves of the heart assist device in an extended state;

FIG. 2 is a schematic view of the structure of the support leaves of the heart assist device of the present invention in a retracted state;

FIG. 3 is a cross-sectional view at the chuck;

FIG. 4 is a diagram illustrating the connection structure between the supporting leaves of the heart assist device and the heart in an extended state;

fig. 5 is a schematic structural view of the heart assist device according to the present invention inserted into the pericardium from the chest wall;

fig. 6 is a partial cross-sectional view of a heart assist device during guide wire guidance.

The reference numerals in fig. 1-6 are illustrated as follows:

1, catheter, 11 chucks, 111 guide channels, 12 medicine injection tubes and 13 standby branch tubes;

2 supporting leaves, 21 shells, 22 flexible bags, 221 first bag bodies, 222 second bag bodies, 222a bulge structures and 23 connecting pipes;

3, guiding the wire;

4 expanding the sheath.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

As used herein, the term "plurality" refers to an indefinite number of plural, usually more than two; and when the term "plurality" is used to indicate a quantity of a particular element, it does not indicate a quantitative relationship between such elements.

Please refer to fig. 1-6, fig. 1 is a schematic structural view of each supporting blade of the heart assist device provided by the present invention in an extending state, fig. 2 is a schematic structural view of each supporting blade of the heart assist device provided by the present invention in a retracting state, fig. 3 is a cross-sectional view of a collet, fig. 4 is a connecting structure diagram of each supporting blade of the heart assist device provided by the present invention in an extending state and a heart, fig. 5 is a schematic structural view of the heart assist device provided by the present invention inserted into a pericardium from a chest wall, and fig. 6 is a partial cross-sectional view of the heart assist device when guiding a guide wire.

As shown in fig. 1 and 4, the present invention provides a heart assist device, which comprises a catheter 1 and a plurality of support leaves 2, wherein each support leaf 2 comprises a housing 21 and a flexible bag 22, the flexible bag 22 can be connected to a medium pumping and injecting device through a connecting tube 23 (the number is not limited), the flexible bag 22 is installed in the housing 21, and after the medium is injected, the flexible bag 22 can be expanded and at least partially exposed outside the housing 21; the heart-pericardium heart protection device further comprises a guiding mechanism and a pushing mechanism, wherein the guiding mechanism is used for guiding the catheter 1 to be inserted into the pericardium, the pushing mechanism can drive the supporting leaves 2 to move along the catheter 1 and extend out of the catheter 1, the shell 21 is made of memory alloy, and in the extending state (working state), the supporting leaves 2 can be unfolded to cover the heart or a specific ventricle.

When the heart transplantation device is used, the catheter 1 can be inserted into a pericardium through the guide mechanism, the supporting leaves 2 are pushed out of the catheter 1 through the pushing mechanism, the shell 21 of the supporting leaves 2 is made of memory alloy, after the supporting leaves 2 extend out of the catheter 1, the supporting leaves can return to the original shape to cover the whole heart or a specific ventricle, then a medium can be injected and extracted into the flexible bag 22 through the medium pumping and injecting device to drive the flexible bag 22 to expand and contract, the heart or the specific ventricle can be assisted to beat, the heart failure patient can be assisted to be treated, the service life of the end-stage heart failure patient can be effectively prolonged, and more time is won for a heart transplantation operation.

Furthermore, in the embodiment of the present invention, the supporting leaves 2 are provided as separate parts for covering the heart, and the positions of the supporting leaves 2 can be adjusted to conveniently cover different chambers, so that the present invention is not limited to the whole covering of the left ventricle or the heart, and can be adapted to a wider variety of heart diseases.

The structure of the guiding mechanism and the pushing mechanism can be set by referring to the guiding mechanism and the pushing mechanism of the heart stent in the prior art, and the structure of the guiding mechanism and the pushing mechanism is not described in detail.

Referring to fig. 5 and 6, in a specific embodiment, the guiding mechanism at least includes a puncture needle (not shown in the figure), a guide wire 3 and an expansion sheath 4, and the implantation process of the heart assist device provided by the embodiment of the present invention is similar to the heart stent implantation, first, the puncture needle is inserted into the chest wall (or other positions, such as radial artery of arm or femoral artery of thigh, etc.), then the guide wire 3 is inserted into the internal channel of the puncture needle, and the guide wire 3 is moved to a designated position with the aid of an imaging device, then the expansion sheath 4 is inserted, and the catheter 1 is inserted into the pericardium along the guide wire, and then the supporting blade 2 in the catheter 1 can be extended out from the front end (the end inserted into the human body) of the catheter 1 by a pushing mechanism to complete the operation.

In a first scheme, as shown in fig. 3, the front end of the catheter 1 may be provided with a collet 11, the collet 11 may be provided with a plurality of guide channels 111 which penetrate axially and are distributed at intervals along the circumferential direction, and the number of the guide channels 111 may be the same as that of the support blades 2; in the extended state, the respective support blades 2 may be extended from the respective guide channels 111 in one-to-one correspondence, and the tail of the respective support blades 2 may be detained in the respective guide channels 111.

With the arrangement, each supporting blade 2 can still be connected with the chuck 11 by the shell 21 with relatively high strength in the extending state, so that the connecting strength of each supporting blade 2 and the catheter 1 can be improved, and the structural strength of the whole instrument in the working state can be further ensured.

In a second variant, the front end of the catheter 1 may also be provided without the aforementioned clamping head 11, and in the extended state the support blades 2 may also be completely extended out of the catheter 1, in which case the support blades 2 are connected to the catheter 1 only via the respective connecting tube 23.

Because the radial dimension of the connecting pipe 23 is much smaller than that of the supporting leaves 2, the front end of the catheter 1 can be smaller by adopting the scheme, and the inner dimension of the catheter 1 only needs to meet the requirement of passing through one supporting leaf 2 once, so that the radial dimension of the catheter 1 is much smaller than that of the first scheme, the wound area can be greatly reduced, the pain of a patient is relieved, and the postoperative quick rehabilitation of the patient is facilitated.

In comparison, the wound generated by the second scheme is smaller, which is more beneficial to realizing micro-wound, and is the preferred scheme of the embodiment of the utility model.

The support blades 2 may be directly mounted in the guide tube 1, and in this case, the guide tube 1 may serve as a guide passage for the support blades 2 and also serve to store the support blades 2. In detail, as shown in fig. 2, in order to reduce the radial dimension of the catheter 1, the support blades 2 may be sequentially arranged along the extension direction of the catheter 1 in the retracted state.

Besides, each supporting leaf 2 can be an independent part, and then the supporting leaves are implanted into the catheter 1 one by one in the operation process, at the moment, the implantation process of the supporting leaves 2 is consistent with the implantation process of the heart stent, the catheter 1 only serves as a guide channel, and the radial dimension of the catheter 1 at least needs to meet the requirement of passing one supporting leaf 2 at a time.

The connection structure between the casing 21 and the flexible bag 22 can be various, as long as the reliable connection between the casing 21 and the flexible bag 22 can be ensured, and the flexible bag 22 can smoothly expand and contract in the process of pumping and injecting the medium, so as to assist the heart to beat. For example, the flexible bladder 22 and the housing 21 may be fixed by adhesion, and in this case, the structure of the housing 21 itself may not be limited as long as a suitable adhesive is selected.

As shown in fig. 1, the housing 21 may have an elongated structure, two ends of the elongated structure may be closed, the circumferential side wall may be provided with an opening, a cavity may be formed in the housing 21, for convenience of description, the extending direction of the housing 21 (i.e., the supporting blade 2) may be a longitudinal direction, the direction perpendicular to the longitudinal direction on the blade surface of the supporting blade 2 may be a transverse direction, both transverse and/or longitudinal dimensions of the cavity may be larger than the opening to form a necking structure, a portion of the flexible bag 22 may be in the cavity, and another portion may extend out of the cavity from the opening, and due to the arrangement of the necking structure, the circumferential side wall of the housing 21 may limit the flexible bag 22 located in the cavity to define the flexible bag 22 in the housing 21.

Specifically, as can be seen from fig. 3, the cross section of the housing 21 at the position where the opening is formed may be substantially U-shaped, and two side walls of the U-shape may be gradually inclined inward from the direction away from the bottom wall to form the aforementioned necking structure.

Further, the flanging that open-ended mouth wall can be equipped with can be smooth transition between flanging and the lateral wall, so set up, can avoid the formation of sharp-pointed structure, then can avoid causing the cutting damage to the flexible bag 22 after the inflation, is favorable to prolonging the life of flexible bag 22.

As for the flexible bag 22, it may include the first bag body 221 and the second bag body 222 which are communicated with each other, and due to the arrangement of the aforesaid necking structure, the transverse dimension of the communication portion of the first bag body 221 and the second bag body 222 is smaller than that of the first bag body and the second bag body, so that the first bag body may be clamped in the housing 21 (or may be fixed in a manner of matching with bonding, etc. at the same time); after the medium is injected, the first balloon 221, the second balloon 222 may be inflated, and the second balloon 222 may be located outside the shell 1. It will be appreciated that the flexible bladder 22 of this construction is primarily adapted to assist the heart or particular chambers of the heart in beating by the expansion and contraction of the second bladder 222.

In the extending direction of the supporting leaf 2, as shown in fig. 1, the second bladder body 222 after being inflated may be in a wave shape to form a plurality of spaced bulge structures 222a, so that each flexible bladder 22 can form a plurality of pressure points on the heart or a specific ventricle, which is more beneficial for assisting the beating of the heart or the specific ventricle.

The contact surface of the flexible bag 22 with the heart or the specific ventricle may be further provided with a suction cup to ensure the close fit of the flexible bag 22 with the heart or the specific ventricle through the suction cup, so that the expansion and contraction of the flexible bag 22 can better act on the heart or the specific ventricle.

The medium pumping and injecting device specifically comprises a pump body and a medium bin, wherein the medium bin is used for storing a medium to be pumped and injected, and the medium can be gas or liquid and the like. The medium pumping and injecting device can be arranged outside the catheter 1, when a patient is in a bedridden state, the medium pumping and injecting device can be placed on one side of a bed, and when the patient goes out, the medium pumping and injecting device can be placed in a backpack and carried by the patient. Here, the embodiment of the present invention does not limit the pressure of the medium in the medium chamber and the power of the pump body, and the flexible bladder 22 can be inflated and deflated smoothly under the action of the medium pumping and injecting device, so as to assist the heart or the specific ventricle to beat.

Still as shown in fig. 3, a medicine injection tube 12 may be further included, and the medicine injection tube 12 may be inserted into the pericardium along the catheter 1 so as to inject the therapeutic medicine into the pericardium through the medicine injection tube 12, in this way, the therapeutic medicine may reach a designated position more quickly than taking medicine, injecting needle, etc., and thus, the affected part may be treated more conveniently.

The outer wall of the catheter 1 can be further connected with a standby branch pipe 13, and in the working state, the standby branch pipe 13 can be positioned outside the human body.

For convenience of description, the front end opening of the conduit 1 is an outlet of the conduit 1, and the rear end opening of the conduit 1 is an inlet of the conduit 1, so that the spare branch 13 is actually equivalent to providing a plurality of inlets for the conduit 1, and when one of the inlets is not available, the other inlet can be used. It is understood that the number of the spare branch pipes 13 is not limited to one, and may be multiple, and may be determined according to actual needs.

Combine fig. 5, fig. 6, the utility model provides a heart auxiliary instrument can implant from the chest wall, compares in traditional heart support implantation art from the mode that arm radial artery or thigh femoral artery implanted, can avoid the blood contact from the mode that the chest wall was implanted to reduce blood infection's risk as far as possible, moreover, implant the route and want short many, the time of implantation operation can reduce by a wide margin, and the operation degree of difficulty also can reduce by a wide margin.

It should be noted that the mode of implanting through the chest wall is a preferred, but not exclusive, solution of the embodiment of the present invention, and in fact, the heart assist device provided by the present invention may also adopt a mode of implanting through the radial artery of the arm or the femoral artery, which does not affect the realization of the function of the heart assist device provided by the present invention.

Further, can also include anchor clamps (not shown in the figure), anchor clamps can include body and sticking department, and the body can be the ring-type to overlap in pipe 1, and the body can slide along pipe 1, works as the utility model provides a heart auxiliary instrument installs the back in place, can operate the sticking department, and the sticking department specifically can be screw etc. it can lock the body in pipe 1 to make the body and chest wall laminate mutually, so set up, be equivalent to providing a strong point for pipe 1, can avoid pipe 1 to rock and cause further expansion damage to the inserted hole on the chest wall to a great extent.

In addition, in each drawing of the embodiment of the present invention, the catheter 1 is in the form of a circular tube, but in fact, the catheter 1 is not necessarily a circular tube, but may be a square tube, a flat tube, or the like, as long as the catheter can be implanted into the human body smoothly and functions such as smooth passage of each supporting blade 2 are satisfied, that is, the shape of the catheter 1 cannot be used as a limitation of the range of implementation of the heart assist device provided by the present invention.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A heart assist device, comprising a catheter (1) and a plurality of support leaves (2), wherein each support leaf (2) comprises a shell (21) and a flexible bag (22), the flexible bag (22) is connected with a medium pumping and injecting device through a connecting pipe (23), the flexible bag (22) is installed on the shell (21), and after the medium is injected, the flexible bag (22) can be expanded and at least partially exposed out of the shell (21);

the pericardium treatment device further comprises a guiding mechanism and a pushing mechanism, wherein the guiding mechanism is used for guiding the catheter (1) to be inserted into the pericardium, the pushing mechanism can drive the supporting leaves (2) to move along the catheter (1) and extend out of the catheter (1), the shell (21) is made of memory alloy, and in the extending state, the supporting leaves (2) can be unfolded to cover the heart or a specific ventricle.

2. Heart assist device according to claim 1, characterized in that in the extended state, each support lobe (2) is fully extended out of the catheter (1).

3. The heart assist device according to claim 1, characterized in that a clamping head (11) is arranged at one end of the catheter (1) implanted into the human body, the clamping head (11) is provided with a plurality of guide channels (111) which penetrate along the axial direction and are distributed at intervals along the circumferential direction, and the number of the guide channels (111) is the same as that of the support leaves (2);

in the extending state, the supporting blades (2) correspondingly extend out of the corresponding guiding channels (111) one by one, and the tail parts of the supporting blades (2) are detained in the corresponding guiding channels (111).

4. Heart assist device according to any one of claims 1-3, characterized in that each support blade (2) is mounted to the catheter (1) and that in the retracted state the support blades (2) are arranged axially one after the other in the catheter (1).

5. Heart assist device according to claim 4, characterized in that the housing (21) is closed at both longitudinal ends and has an opening in the side wall, and that the housing (21) has a chamber therein, the chamber having a larger transverse and/or longitudinal dimension than the opening;

a portion of the flexible bladder (22) is located within the chamber and another portion extends out of the chamber from the opening.

6. A heart assist device as in claim 5 wherein the mouth wall of the opening is provided with a cuff that transitions smoothly with the side wall.

7. Heart assist device according to claim 5, wherein the flexible bladder (22) comprises a first bladder (221) and a second bladder (222) in communication, the first bladder (221) being located within the chamber and the second bladder (222) being located outside the housing (21);

in the medium injection state, the second balloon (222) can be expanded, and the expanded second balloon (222) is wavy in the extending direction of the supporting leaves (2) to form a plurality of spaced bulge structures (222 a).

8. Heart assist device according to claim 4, characterized in that the contact surface of the flexible bladder (22) with the heart or the specific ventricle is provided with suction cups, each flexible bladder (22) comprising a plurality of bulge structures (222a) which can bulge after being filled with a medium.

9. The heart assist device according to claim 4, characterized in that the medium pumping device is arranged outside the catheter (1), and the pumped medium is gas or liquid;

the guiding mechanism comprises a puncture needle, a guide wire (3) and an expansion sheath (4).

10. Heart assist device according to claim 4, further comprising a clamp, which clamp comprises a body that is fitted over the catheter (1) and is slidable along the catheter (1), and a locking portion that is adapted to lock the body to the catheter (1).

11. The heart assist device of claim 4, further comprising a drug injection tube (12), the drug injection tube (12) being insertable into the pericardium along the catheter (1);

the outer wall of the catheter (1) is further connected with a standby branch pipe (13), and when the catheter is used, the standby branch pipe (13) is located on the outer side of a human body.

12. Heart assist device according to claim 4, characterized in that the catheter (1) is inserted into the body through the chest wall.