CN110478546B - A heart assist device - Google Patents
A heart assist device Download PDFInfo
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- CN110478546B CN110478546B CN201910867230.0A CN201910867230A CN110478546B CN 110478546 B CN110478546 B CN 110478546B CN 201910867230 A CN201910867230 A CN 201910867230A CN 110478546 B CN110478546 B CN 110478546B
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- catheter
- heart
- assist device
- heart assist
- supporting
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- 230000007246 mechanism Effects 0.000 claims abstract description 28
- 210000003516 pericardium Anatomy 0.000 claims abstract description 13
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 6
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 210000000779 thoracic wall Anatomy 0.000 claims description 10
- 238000005086 pumping Methods 0.000 claims description 9
- 239000003814 drug Substances 0.000 claims description 8
- 229940079593 drug Drugs 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000000717 retained effect Effects 0.000 claims description 2
- 206010019280 Heart failures Diseases 0.000 abstract description 14
- 238000002054 transplantation Methods 0.000 abstract description 6
- 238000002513 implantation Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 239000008280 blood Substances 0.000 description 5
- 210000004369 blood Anatomy 0.000 description 5
- 238000010009 beating Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 210000001105 femoral artery Anatomy 0.000 description 3
- 210000002321 radial artery Anatomy 0.000 description 3
- 210000000689 upper leg Anatomy 0.000 description 3
- 239000002775 capsule Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000004083 survival effect Effects 0.000 description 2
- 208000011580 syndromic disease Diseases 0.000 description 2
- 229940126585 therapeutic drug Drugs 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000003205 diastolic effect Effects 0.000 description 1
- 230000004064 dysfunction Effects 0.000 description 1
- 208000019622 heart disease Diseases 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 210000005240 left ventricle Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002601 radiography Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/34—Trocars; Puncturing needles
- A61B17/3415—Trocars; Puncturing needles for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/10—Location thereof with respect to the patient's body
- A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
- A61M60/126—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel
- A61M60/148—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/50—Details relating to control
- A61M60/508—Electronic control means, e.g. for feedback regulation
- A61M60/562—Electronic control means, e.g. for feedback regulation for making blood flow pulsatile in blood pumps that do not intrinsically create pulsatile flow
Landscapes
- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Cardiology (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Biomedical Technology (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Anesthesiology (AREA)
- Mechanical Engineering (AREA)
- Surgery (AREA)
- Hematology (AREA)
- Vascular Medicine (AREA)
- Molecular Biology (AREA)
- Medical Informatics (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Gastroenterology & Hepatology (AREA)
- Prostheses (AREA)
- External Artificial Organs (AREA)
Abstract
The invention 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 drawing and injecting device through a connecting pipe and is arranged on the shell, the flexible bag can expand and at least partially expose out of the shell after injecting a medium, the heart auxiliary instrument further comprises a guide mechanism and a pushing mechanism, the guide mechanism is used for guiding the catheter to be inserted into the 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 heart auxiliary device provided by the invention can assist the heart or a specific ventricle to beat, and further can assist the patient with heart failure in treatment so as to strive for time for heart transplantation.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to a heart auxiliary appliance for treating heart failure.
Background
Heart failure is abbreviated as heart failure, which means that venous blood is not fully discharged out of the heart due to dysfunction of the systolic function and/or the diastolic function of the heart, so that venous blood is accumulated, and arterial blood is not filled enough, thereby causing heart circulatory disturbance syndrome, and the morbidity of the heart circulatory disturbance syndrome is increased year by year along with the age, so that 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 expected survival rate of 1 year can reach 85%, but heart donors are very short, and many patients cannot find a proper heart at all, so that the opportunity of saving life is missed.
Therefore, how to provide a solution to treat or alleviate heart failure, and thus strive for time for heart transplantation, is still a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a heart auxiliary device which can assist the heart or a specific ventricle to beat, and further can assist the patient with heart failure to pay time for heart transplantation.
In order to solve the technical problems, the invention provides 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 drawing and injecting device through a connecting pipe, the flexible bag is arranged on the shell and can expand and at least partially expose outside the shell after injecting a medium, the heart auxiliary instrument further comprises a guide mechanism and a pushing mechanism, the guide mechanism is used for guiding the catheter to be inserted into the 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 heart infusion device is used, the guide tube can be inserted into the pericardium through the guide mechanism, then the supporting leaf is pushed out of the guide tube through the pushing mechanism, and as the shell of the supporting leaf is made of the memory alloy, the supporting leaf can be restored to be original state after extending out of the guide tube so as to cover the whole heart or a specific ventricle, then the medium can be injected and extracted into the flexible bag through the medium pumping device so as to drive the flexible bag to expand and contract, the heart or the specific ventricle can be assisted to beat, further, the auxiliary treatment can be carried out on a patient with heart failure, the service life of the patient with heart failure at the end stage can be effectively prolonged, and more time is striven for heart transplantation operation.
Optionally, in the extended state, each of the support leaves extends completely out of the catheter.
Optionally, a chuck is arranged at one end of the catheter implanted into a human body, the chuck is provided with a plurality of guide channels which are penetrated along the axial direction and distributed at intervals along the circumferential direction, the number of the guide channels is the same as that of the supporting leaves, in the extending state, each supporting leaf extends out of the corresponding guide channel in a one-to-one correspondence manner, and the tail part of each supporting leaf is retained in the corresponding guide channel.
Optionally, each supporting leaf is mounted in the catheter, and in the retracted state, each supporting leaf is sequentially arranged in the catheter along the axial direction.
Optionally, the two longitudinal ends of the shell are closed, the side wall is provided with an opening, the shell is internally provided with a cavity, the transverse and/or longitudinal dimensions of the cavity are larger than those of the opening, one part of the flexible bag is positioned in the cavity, and the other part of the flexible bag extends out of the cavity from the opening.
Optionally, the mouth wall of the opening is provided with a flanging which smoothly transitions with the side wall.
Optionally, the flexible bag comprises a first bag body and a second bag body which are communicated, the first bag body is positioned in the cavity, the second bag body is positioned outside the shell, in a medium injection state, the second bag body can be inflated, and the inflated second bag body is in a wave shape in the extending direction of the supporting leaf so as to form a plurality of bulge structures with intervals.
Optionally, a sucking disc is disposed at a contact surface between the flexible bag and the heart or the specific ventricle, and each flexible bag includes a plurality of bulge structures capable of bulge after medium is injected.
Optionally, the medium pumping and injecting device is arranged outside the catheter, the pumped and injected medium is gas or liquid, and the guiding mechanism comprises a puncture needle, a guide wire and an expansion sheath.
Optionally, the device further comprises a clamp, wherein the clamp comprises a body and a locking part, the body is sleeved on the catheter and can slide along the catheter, and the locking part can lock the body to the catheter.
Optionally, the device also comprises a medicine injection tube which can be inserted into the pericardium along the catheter, and the outer wall of the catheter is also connected with a standby branch tube which is positioned outside the human body when in use.
Optionally, the catheter is inserted into the human body through the chest wall.
Drawings
FIG. 1 is a schematic view of the structure of the support leaves of the heart assist device of the present invention 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 collet;
FIG. 4 is a diagram showing the connection of the support leaves of the heart assist device of the present invention in an extended position to the heart;
FIG. 5 is a schematic 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 as guided by a guidewire.
The reference numerals in fig. 1-6 are illustrated as follows:
1a catheter, 11 a clamping head, 111 a guide channel, 12 a medicine injection tube and 13 a standby branch tube;
2 supporting leaves, 21 shells, 22 flexible bags, 221 first bags, 222 second bags, 222a bulge structures and 23 connecting pipes;
3, guiding a wire;
4 expanding the sheath.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
The term "plurality" as used herein refers to an indefinite number of pieces, typically two or more, and when the term "plurality" is used to denote the number of pieces, it does not denote the quantitative interrelationship of the pieces.
Referring to fig. 1-6, fig. 1 is a schematic structural view of each supporting leaf of the heart assist device provided by the present invention in an extended state, fig. 2 is a schematic structural view of each supporting leaf of the heart assist device provided by the present invention in a retracted state, fig. 3 is a cross-sectional view of a chuck, fig. 4 is a connecting structure diagram of each supporting leaf of the heart assist device provided by the present invention in an extended state with 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 guided by a guide wire.
As shown in fig. 1 and 4, the invention provides a heart assist device, which comprises a catheter 1 and a plurality of supporting leaves 2, wherein each supporting leaf 2 comprises a shell 21 and a flexible bag 22, the flexible bag 22 can be connected with a medium pumping and injecting device through a connecting pipe 23 (the number is not limited), the flexible bag 22 is arranged on the shell 21, after injecting a medium, the flexible bag 22 can be expanded and at least partially exposed outside the shell 21, the heart assist device further comprises a guiding mechanism and a pushing mechanism, the guiding mechanism is used for guiding the catheter 1 to be inserted into a pericardium, the pushing mechanism can drive each supporting leaf 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), each supporting leaf 2 can be unfolded to cover the heart or a specific ventricle.
When the heart failure heart infusion device is used, the guide tube 1 can be inserted into the pericardium through the guide mechanism, then the supporting leaf 2 is pushed out of the guide tube 1 through the pushing mechanism, and as the shell 21 of the supporting leaf 2 is made of the memory alloy, after the supporting leaf 2 stretches out of the guide tube 1, the supporting leaf can be restored to be original state so as to cover the whole heart or a specific ventricle, then the medium can be injected and extracted into the flexible bag 22 through the medium pumping device so as to drive the flexible bag 22 to expand and contract, the heart or the specific ventricle can be assisted to beat, further, the auxiliary treatment can be carried out on a patient with heart failure, the service life of the patient with heart failure at the end stage can be effectively prolonged, and more time is striven for heart transplantation operation.
In addition, in the embodiment of the invention, the parts for coating the heart are a plurality of support leaves 2 which are separately arranged, and coating of different ventricles can be conveniently realized by adjusting the positions of the support leaves 2, so that the invention is not limited to the whole coating of the left ventricle or the heart, and can be suitable for more kinds 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 detailed description of the structure is omitted.
Referring to fig. 5 and 6, in an embodiment, the guiding mechanism may include at least a puncture needle (not shown), a guide wire 3 and an expansion sheath 4, and the implantation process of the heart assist device according to the embodiment of the present invention is similar to the heart stent implantation, first, the heart assist device is inserted into a chest wall (or other location, such as an arm radial artery or a thigh femoral artery, etc.) through the puncture needle, then the guide wire 3 is threaded through an inner channel of the puncture needle, and the guide wire 3 is operated to move to a designated location with the aid of a radiography device, then the expansion sheath 4 is inserted, and the catheter 1 is inserted into a pericardium along the guide wire, and then, the supporting blade 2 in the catheter 1 may be extended from a front end (an end inserted into a human body) of the catheter 1 by a pushing mechanism to complete the operation.
In the first scheme, as shown in fig. 3, the front end of the catheter 1 may be provided with a chuck 11, the chuck 11 may be provided with a plurality of guide channels 111 penetrating in the axial direction and distributed at intervals in the circumferential direction, the number of the guide channels 111 may be the same as that of the supporting leaves 2, in the extended state, each supporting leaf 2 may extend from the corresponding guide channel 111 in a one-to-one correspondence manner, and the tail of each supporting leaf 2 may stay in the corresponding guide channel 111.
By means of the arrangement, the supporting leaves 2 can still establish connection with the clamping heads 11 by means of the shell 21 with relatively high strength in the extending state, the connection strength of the supporting leaves 2 and the guide tube 1 can be improved, and further the structural strength of the whole instrument in the working state can be guaranteed.
In the second embodiment, the tip of the catheter 1 may not be provided with the clip 11, and each of the support blades 2 may extend completely out of the catheter 1 in the extended state, and in this case, each of the support blades 2 may establish a connection with the catheter 1 only through the respective connection tube 23.
Because the radial dimension of the connecting pipe 23 is much smaller than that of the supporting blade 2, the front end dimension of the catheter 1 can be smaller by adopting the scheme, and the inner dimension of the catheter 1 can be only required to meet the requirement of passing through one supporting blade 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 rapid rehabilitation after the operation of the patient is facilitated.
In comparison, the second solution has smaller wound, which is more favorable for realizing the minimally invasive, and is a preferred solution of the embodiment of the invention.
The support blades 2 may be directly installed in the guide tube 1, and 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, in the retracted state, the support blades 2 may be sequentially arranged along the extending direction of the catheter 1.
In addition, each supporting blade 2 may be an independent component, and then the supporting blades 2 are implanted into the catheter 1 one by one during the operation, wherein the implantation process of the supporting blades 2 is consistent with the implantation process of the cardiac stent, the catheter 1 is only used as a guiding channel, and the radial dimension of the catheter 1 at least needs to meet the requirement of single-pass through one supporting blade 2.
The connection structure between the housing 21 and the flexible bag 22 can be varied, so long as reliable connection between the two can be ensured, and the flexible bag 22 can expand and contract smoothly in the medium pumping and injecting process, thereby assisting the heart to perform beating. For example, the flexible bag 22 and the housing 21 may be bonded and fixed, and the structure of the housing 21 itself may be not limited, so long as a suitable adhesive is selected.
As shown in fig. 1, the casing 21 may be a long strip structure, two ends of the casing may be closed, the circumferential side wall may be provided with an opening, a cavity may be formed in the casing 21, for convenience of description, an extending direction of the casing 21 (i.e., the supporting leaf 2) may be longitudinal, a direction perpendicular to the longitudinal direction may be transverse on a leaf surface of the supporting leaf 2, and a transverse dimension and/or a longitudinal dimension of the cavity may be greater than the opening, so as to form a necking structure, a part of the flexible bag 22 may be in the cavity, and another part may extend out of the cavity from the opening, and due to the necking structure, the circumferential side wall of the casing 21 may limit the flexible bag 22 located in the cavity, so as to limit the flexible bag 22 in the casing 21.
Specifically, in connection with fig. 3, the cross section of the housing 21 at the position where the opening is provided may be substantially U-shaped, and both side walls of the U-shape may be gradually inclined inward from a direction away from the bottom wall to form the aforementioned necking structure.
Further, the open-ended mouth wall can be equipped with the outward flange, can be smooth transition between outward flange and the lateral wall, so set up, can avoid sharp-pointed structure's formation, can avoid then causing the cutting damage to flexible bag 22 after the inflation, be favorable to prolonging flexible bag 22's life.
For the flexible bag 22, it may include a first bag body 221 and a second bag body 222 that are connected, and due to the arrangement of the above-mentioned necking structure, the lateral dimensions of the connection portions of the first bag body 221 and the second bag body 222 are smaller than those 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 by co-bonding, etc.), after the medium is injected, the first bag 221 and the second bag 222 may be inflated, and the second bag body 222 may be located outside the housing 1. It will be appreciated that this configuration of flexible bladder 22 primarily assists the heart or a particular ventricle in beating by inflation and deflation of second bladder 222.
In the extending direction of the supporting leaf 2, as shown in fig. 1, the inflated second capsules 222 may be in a wave shape to form a plurality of bulge structures 222a spaced apart from each other, so that each flexible capsule 22 may form a multi-point compression on the heart or the specific ventricle, which is more beneficial for assisting the beating of the heart or the specific ventricle.
The contact surface between the flexible bag 22 and the heart or the specific ventricle can be further provided with a sucking disc, so that the sucking disc can ensure the flexible bag 22 to be tightly attached to the heart or the specific ventricle, and the expansion and the 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 drawing and injecting device can be arranged outside the catheter 1, when a patient is in a bedridden state, the medium drawing and injecting device can be placed on one side of a bed, and when the patient goes out, the medium drawing and injecting device can be placed in a knapsack and carried by the patient. Here, the embodiment of the present invention is not limited to the pressure of the medium in the medium chamber, the power of the pump body, and the like, as long as the flexible bag 22 is ensured to be smoothly expanded and contracted under the action of the medium pumping and injecting device, and further, the heart or the specific ventricle is assisted to perform the beating.
As also shown in fig. 3, a drug injection tube 12 may be further included, and the drug injection tube 12 may be inserted into the pericardium along the catheter 1, so that the therapeutic drug may be injected into the pericardium through the drug injection tube 12, in this manner, the therapeutic drug may reach a designated location more quickly than if the drug was taken, injected, etc., and is more advantageous for treatment of the affected area.
The outer wall of the catheter 1 can also be connected with a spare branch pipe 13, and in the working state, the spare branch pipe 13 can be positioned outside a human body.
For convenience of description, the front opening of the conduit 1 may be the outlet of the conduit 1, and the rear opening of the conduit 1 may be the inlet of the conduit 1, so that the above-mentioned standby branch pipe 13 is actually equivalent to providing a plurality of inlets for the conduit 1, and when one of the inlets is unavailable, the other inlets may be used. It will be appreciated that the number of spare branches 13 is not limited to one, but may be plural, and may be specifically determined according to actual needs.
With reference to fig. 5 and 6, the heart assist device provided by the invention can be implanted from the chest wall, compared with the conventional implantation method of the heart stent from the radial artery of the arm or the femoral artery of the thigh, the implantation method of the heart assist device from the chest wall can avoid blood contact, so that the risk of blood infection is reduced as much as possible, the implantation path is much shorter, the implantation time can be greatly reduced, and the operation difficulty can be greatly reduced.
It should be noted that, the chest wall implantation is a preferred, but not exclusive, embodiment of the present invention, and in fact, the heart assist device provided by the present invention may also be implanted via the radial artery of the arm or the femoral artery of the thigh, which does not affect the implementation of the function of the heart assist device provided by the present invention.
Further, the heart assist device may further comprise a clamp (not shown in the figure), the clamp may comprise a body and a locking part, the body may be annular and sleeved on the catheter 1, the body may slide along the catheter 1, when the heart assist device provided by the invention is in place, the locking part may be operated, and the locking part may be a screw or the like, which can lock the body on the catheter 1 and make the body fit with the chest wall, so that the setting is equivalent to providing a supporting point for the catheter 1, and further enlarging damage to the insertion opening on the chest wall caused by shaking of the catheter 1 can be avoided to a greater extent.
In the drawings of the embodiment of the present invention, the catheter 1 is in the form of a circular tube, but in reality, the catheter 1 is not necessarily a circular tube, and may be a square tube, a flat tube, or the like, as long as it can be smoothly implanted into a human body and satisfies the smooth passing functions of the supporting blades 2, that is, the outer shape of the catheter 1 is not limited as the scope of implementation of the heart assist device provided by the present invention.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (10)
1. A heart assist device characterized by 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 bags (22) are connected with a medium pumping and injecting device through connecting pipes (23), the flexible bags (22) are arranged on the shells (21), and after injecting a medium, the flexible bags (22) can be expanded and at least partially exposed outside the shells (21);
The 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 each supporting blade (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, each supporting blade (2) can be unfolded to cover a heart or a specific ventricle, so that the flexible bag (22) is in contact with the heart or the specific ventricle;
each supporting blade (2) is arranged in the guide pipe (1), and in a retracted state, each supporting blade (2) is sequentially arranged in the guide pipe (1) along the axial direction;
The medium pumping and injecting device is arranged outside the catheter (1), the pumped and injected medium is gas or liquid, and the guiding mechanism comprises a puncture needle, a guide wire (3) and an expansion sheath tube (4).
2. Heart assist device according to claim 1, characterized in that in the extended state, each support leaf (2) extends completely out of the catheter (1).
3. Heart assist device according to claim 1, characterized in that the catheter (1) is provided with a collet (11) at the end implanted in the human body, the collet (11) is provided with a plurality of guide channels (111) penetrating axially and distributed at intervals circumferentially, the number of the guide channels (111) is the same as that of the support blades (2);
In the extended state, each supporting leaf (2) extends from the corresponding guide channel (111) in a one-to-one correspondence, and the tail of each supporting leaf (2) is retained in the corresponding guide channel (111).
4. A heart assist device as in any of claims 1-3, characterized in that the housing (21) is closed at its longitudinal ends and provided with openings in the side walls, the housing (21) having a chamber therein, the chamber having a transverse and/or longitudinal dimension which is larger than the openings;
A portion of the flexible bladder (22) is positioned within the chamber and another portion extends from the opening out of the chamber.
5. The heart assist device of claim 4 wherein a mouth wall of the opening is provided with a cuff that smoothly transitions with the side wall.
6. The heart assist device of claim 4 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 bag body (222) can be inflated, and the inflated second bag body (222) presents a wave shape in the extending direction of the supporting leaf (2) so as to form a plurality of bulge structures (222 a) with intervals.
7. A heart assist device as in any of claims 1-3 wherein the interface 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 (222 a) capable of bulge upon injection of a medium.
8. A heart assist device according to any of claims 1-3, further comprising a clamp comprising a body that is sheathed over the catheter (1) and is slidable along the catheter (1), and a locking portion that is capable of locking the body to the catheter (1).
9. A heart assist device according to any of claims 1-3, characterized in that it further comprises a drug injection tube (12), said drug injection tube (12) being insertable into the pericardium along said catheter (1);
the outer wall of the catheter (1) is also connected with a standby branch pipe (13), and when in use, the standby branch pipe (13) is positioned outside a human body.
10. A heart assist device according to any of claims 1-3, characterized in that the catheter (1) is inserted into the human body through the chest wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910867230.0A CN110478546B (en) | 2019-09-12 | 2019-09-12 | A heart assist device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910867230.0A CN110478546B (en) | 2019-09-12 | 2019-09-12 | A heart assist device |
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| Publication Number | Publication Date |
|---|---|
| CN110478546A CN110478546A (en) | 2019-11-22 |
| CN110478546B true CN110478546B (en) | 2025-01-28 |
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|---|---|---|---|
| CN201910867230.0A Active CN110478546B (en) | 2019-09-12 | 2019-09-12 | A heart assist device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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