CN218128872U - Heart contraction auxiliary instrument for heart failure treatment - Google Patents
Heart contraction auxiliary instrument for heart failure treatment Download PDFInfo
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- CN218128872U CN218128872U CN202123449267.3U CN202123449267U CN218128872U CN 218128872 U CN218128872 U CN 218128872U CN 202123449267 U CN202123449267 U CN 202123449267U CN 218128872 U CN218128872 U CN 218128872U
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Abstract
The utility model discloses a heart contraction auxiliary instrument for heart failure treatment, which is used for being arranged on the outer wall of the heart to assist the heart contraction and comprises an annular upper elastic wire, an annular lower elastic wire and an elastic spring piece arranged between the upper elastic wire and the lower elastic wire; the elastic spring piece is provided with a plurality of main spring wires which are uniformly distributed along the circumferential direction of the upper elastic wire and the lower elastic wire, and the main spring wires are respectively connected to the upper elastic wire through top rings arranged at the end parts of the main spring wires and are respectively connected to the lower elastic wire through bottom rings arranged at the other end parts of the main spring wires. The instrument assists the heart to contract through an elastic spring element arranged outside the heart, and when the heart contracts to the minimum volume, the elastic spring element is in a pre-expansion state when the instrument is arranged on the outer wall of the heart; in diastole, the elastic spring part expands and stores elastic energy, in systole, the elastic spring part releases the elastic energy to rebound, and is tightly attached to the outer wall of the heart in the whole diastole and systole.
Description
Technical Field
The utility model relates to the technical field of medical equipment, concretely relates to cardiac contraction auxiliary instrument suitable for heart failure treatment, reinforcing cardiac contraction function.
Background
Heart failure is a complex heart disease that seriously compromises patient health and life. At present, the main treatment means of heart failure are drug therapy, heart transplantation, heart auxiliary devices and the like. The medicine has limited curative effect, is mostly used for relieving symptoms and is difficult to reverse the heart failure process; heart transplantation is the most effective method for treating heart failure at present, but is limited by serious defects of donors, so that a large number of patients with heart failure cannot be treated and lose lives; implanting a ventricular assist blood pump is an effective way to extend the life of such patients. The ventricular assist device is a device for assisting a heart to do work in a mechanical mode on the premise of keeping the heart of a patient, and is an important method for treating heart failure at present.
Most of the current heart assist devices are blood contact type, which generally uses a rotary impeller to do work to draw blood from the left ventricle to the aorta so as to improve the cardiac output and raise the blood pressure, thereby reducing the heart load of a patient. The blood contact type ventricular assist device is easy to generate thrombus due to the fact that components in the device are in contact with blood for a long time, and requires a patient to take anticoagulant drugs for a long time. The above problems with blood contact heart assist devices limit their clinical application.
Therefore, the invention provides a non-contact heart auxiliary device suitable for heart failure treatment, which has important significance for replacing drug treatment and solving the problem of blood damage of the traditional ventricular auxiliary device.
SUMMERY OF THE UTILITY MODEL
To the problem that traditional ventricle auxiliary device and blood contact caused blood destruction easily, implanted the patient need take medicine for a long time behind the ventricle auxiliary device, the utility model aims to provide a cardiac contraction auxiliary device for heart failure treatment, this apparatus is through installing in the supplementary cardiac contraction of elasticity spring spare of heart outer wall, increases heart output volume, need not power supply, reliability height.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a heart contraction auxiliary instrument for heart failure treatment is used for being installed on the outer wall of a heart to assist the heart to contract and comprises an annular upper elastic wire, an annular lower elastic wire and an elastic spring piece arranged between the upper elastic wire and the lower elastic wire; the elastic spring piece is provided with a plurality of main spring wires which are uniformly distributed along the circumferential direction of the upper elastic wire and the lower elastic wire, and the main spring wires are respectively connected to the upper elastic wire through top rings arranged at the end parts of the main spring wires and are respectively connected to the lower elastic wire through bottom rings arranged at the other end parts of the main spring wires.
Preferably, the resilient spring element is in a pre-expanded state when the apparatus is mounted on the outer wall of the heart and the heart is contracted to a minimum volume; the elastic spring part is pressed to expand outwards and store elastic energy in diastole, and releases elastic energy to rebound in systole, and the elastic spring part is tightly attached to the outer wall of the heart in the whole diastole and systole.
By pre-expanded, it is meant that the spring element is in its natural state smaller than when the heart contracts to its minimum volume, and is in a state of being compressed and expanded outwardly when the heart contracts to its minimum volume.
Preferably, the main spring wires are integrally formed with the top ring and the bottom ring, and two adjacent main spring wires share one top ring or one bottom ring.
Preferably, the upper spring wire is connected with a plurality of main spring wires in a manner of penetrating through each top ring; the lower elastic wires are connected with the main spring wires in a mode of penetrating through the bottom rings.
Preferably, the diameters of the upper elastic wire, the lower elastic wire and the main spring wires are 0.5mm-2mm respectively.
Preferably, the number of the main spring wires is 8-40.
The utility model has the advantages that:
the utility model discloses a cardiac contraction auxiliary apparatus can be compressed to less size and implant the thorax through the little incision of chest wall, wound when can reducing the operation reduces the damage to the patient, does benefit to and shortens patient recovery phase.
The auxiliary heart contraction instrument of the utility model expands outwards to store elastic energy when receiving the pressure generated by the expansion of the heart volume during diastole, rebounds to release the elastic energy during systole, and can play a role in enhancing the function of systole; when the elastic spring part is arranged on the outer wall of the heart, a certain amount of pre-expansion exists, namely when the heart contracts to the minimum volume, the elastic spring part is still in a state of outwards pressing and having a certain expansion amount, and the instrument can be well attached to the outer surface of the heart in the whole cardiac cycle; the upper and lower elastic wires passing through the top and bottom rings can mount the device to the outer surface of the heart and also serve to enhance the resiliency of the device. The utility model discloses a heart contraction auxiliary instrument is close with the shape of heart, does benefit to the damage to heart surface when good laminating and reduction apparatus action.
The heart contraction auxiliary instrument of the utility model utilizes the self-resilience performance after expansion to assist heart contraction, does not need a power source, has high reliability and eliminates the risk of wire infection; the instrument is not in contact with blood, so that strong shearing force for damaging the blood cannot be generated; compared with the drug therapy, the device can immediately enhance the contractile function of the heart after being implanted, quickly relieve a series of symptoms brought by heart failure to patients, unload the heart and promote the contractile function to gradually return to normal.
Drawings
Fig. 1 is a top view of the structure of the heart contraction assisting device of the present invention.
Fig. 2 is a schematic structural view of the elastic spring member in the heart contraction assisting device of the present invention.
Fig. 3 is a schematic structural view of the auxiliary device for cardiac contraction during systole, which is mounted on the outer wall of the heart.
Fig. 4 is a schematic structural view of the diastolic phase systolic auxiliary device installed on the outer wall of the heart.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
The utility model discloses a systole auxiliary device is used for installing at the supplementary systole of heart outer wall, as shown in fig. 1, this apparatus includes annular last elastic wire 2, annular elastic wire 3 down and sets up elastic spring spare 1 between last elastic wire 2 and elastic wire 3 down. As shown in fig. 2, the elastic spring element 1 has a plurality of main spring wires 12 uniformly distributed along the circumferential direction of the upper and lower elastic wires 2 and 3, and the plurality of main spring wires 12 are connected to the upper elastic wire 2 through top rings 11 provided at the ends thereof, respectively, and connected to the lower elastic wire 3 through bottom rings 13 provided at the other ends thereof, respectively. As shown in fig. 3 and 4, in the state that the instrument is installed on the outer wall of the heart 4, and when the heart contracts to the minimum volume, the elastic spring element 1 still has a certain amount of outward expansion under pressure, namely, is in a pre-expansion state; in diastole, the elastic spring element 1 is pressed to expand outwards and store elastic energy, in systole, the elastic spring element 1 releases the elastic energy to rebound, and is tightly attached to the outer wall of the heart in the whole diastole and systole.
The instrument of the utility model adopts the elastic spring part which is rebounded after being compressed and expanded to release elastic energy to assist the heart to contract, and is arranged on the outer wall of the heart through the upper elastic wire and the lower elastic wire, when the patient is in the diastole of the heart, the elastic spring part bears the expansion force of the outer wall of the heart and is extruded to expand outwards to store the elastic energy, and the upper elastic wire and the lower elastic wire are stretched along with the elastic spring part so as to ensure that the elastic spring part is attached to the surface of the heart; when the patient's heart contracts, the elastic spring part with stored elastic energy rebounds inwards along with the contracting heart to release elastic energy to assist the heart to contract, and the upper elastic wire and the lower elastic wire contract along with the contracting heart to enable the elastic spring part to be attached to the surface of the heart.
In the auxiliary apparatus for cardiac contraction of the present invention, the elastic spring member is made of memory alloy such as nickel-titanium alloy with good blood compatibility; the material of the upper elastic thread and the lower elastic thread includes but is not limited to silicone rubber with blood compatibility and good elasticity. The wire diameter of the elastic wire and the spring wire which form the instrument is between 0.5mm and 2mm. As shown in fig. 2, the elastic spring element 1 comprises a top ring 11, a plurality of main spring wires 12 and a bottom ring 13, which can be designed as an integrally formed structure, and two adjacent main spring wires 12 share one top ring 11 or one bottom ring 13. The upper spring wire 2 is connected to a plurality of rebound spring wires 12 in such a manner as to pass through top rings 11 of the plurality of main spring wires 12 shown in fig. 1; the lower spring wire 3 is connected to a plurality of rebound springs 12 in such a manner as to pass through the bottom loops 13 of a plurality of main springs 112 shown in fig. 1.
The utility model discloses a cardiac contraction auxiliary apparatus can be compressed to less size and implant the thorax through the little incision on the chest wall, and the specific implantation process is: the instrument is compressed and then implanted into the chest cavity through a small incision on the chest wall, the instrument is restored to the natural state, and the instrument is spread to push the sleeve upwards from the apex of the heart to be sleeved on the outer surface of the heart. In order to facilitate the operation, the upper elastic wire is in a disconnected state when being implanted, passes through part of the top ring, and is closed into a ring after the whole device is sleeved on the outer surface of the heart. At this time, as shown in fig. 3 and 4, a plurality of (for example, 8 to 40) main spring wires 12 uniformly arranged on the elastic spring element 1 are attached to the outer surface of the heart, and the upper elastic wire 2 and the lower elastic wire 3 penetrating through the top ring 11 and the bottom ring 13 fix the whole apparatus on the outer surface of the heart to prevent falling off; when the heart chamber is in diastole (as shown in fig. 4), the main spring wires 12 are outwards pressed by the expansion of the heart to expand, the upper elastic wire 2 and the lower elastic wire 3 are also lengthened, the main spring wires 12 store elastic energy, when the heart contracts (as shown in fig. 3), the main spring wires 12 rebound inwards to release the elastic energy to assist the heart to contract, and the upper elastic wire 2 and the lower elastic wire 3 are also contracted, so that the instrument is prevented from falling off from the outer surface of the heart.
In the heart contraction auxiliary instrument, the uniformly arranged spring wires expand outwards to store elastic energy when receiving pressure generated by the expansion of the heart volume during diastole, and the spring wires rebound to release the elastic energy during systole, so that the heart contraction function can be enhanced; when the spring wire is arranged on the outer wall of the heart, a certain amount of pre-expansion is carried out, namely, the spring wire is compressed to a certain extent when the heart contracts to the minimum volume, so that the instrument can be well attached to the surface of the heart in the whole cardiac cycle; the upper elastic wire and the lower elastic wire which penetrate through the top ring and the bottom ring can install the instrument on the outer surface of the heart and play a role in enhancing the resilience of the instrument; the shape of the elastic spring piece is similar to that of the heart, so that the elastic spring piece is favorable for good fitting and reducing the damage to the surface of the heart when an instrument acts; the instrument assists the heart to contract by utilizing the self-rebounding performance after expansion, does not need a power source, has high reliability and eliminates the risk of wire infection; the instrument is not in contact with blood, so that strong shearing force for damaging the blood cannot be generated; compared with the drug therapy, the device can enhance the contractile function of the heart immediately after being implanted, quickly relieve a series of symptoms brought by heart failure to patients, unload the heart and promote the contractile function to be gradually recovered to normal.
Finally, it should be understood that the above-described preferred embodiments of the present invention are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A heart contraction auxiliary instrument for heart failure treatment is characterized in that the instrument is used for being installed on the outer wall of a heart to assist the heart contraction and comprises an annular upper elastic wire, an annular lower elastic wire and an elastic spring piece arranged between the upper elastic wire and the lower elastic wire; the elastic spring piece is provided with a plurality of main spring wires which are uniformly distributed along the circumferential direction of the upper elastic wire and the lower elastic wire, and the main spring wires are respectively connected to the upper elastic wire through top rings arranged at the end parts of the main spring wires and are respectively connected to the lower elastic wire through bottom rings arranged at the other end parts of the main spring wires.
2. A systole assist device for the treatment of heart failure as defined in claim 1, wherein the resilient spring member is in a pre-expanded state when the device is mounted on the outer wall of the heart and the heart contracts to a minimum volume;
the elastic spring part is pressed to expand outwards and store elastic energy in diastole, and releases elastic energy to rebound in systole, and the elastic spring part is tightly attached to the outer wall of the heart in the whole diastole and systole.
3. A heart contraction assistance device according to claim 1 or 2, wherein the main spring wires are integrally formed with the top ring and the bottom ring, and two adjacent main spring wires share one top ring or one bottom ring.
4. The heart contraction assistance device for heart failure treatment according to claim 1 or 2, wherein the upper elastic wire is connected to a plurality of main spring wires in a manner of being inserted in each top ring; the lower elastic wires are connected with the main spring wires in a mode of penetrating through the bottom rings.
5. The heart contraction assistance device for heart failure treatment according to claim 1 or 2, wherein the upper elastic wire, the lower elastic wire and the plurality of main spring wires have diameters of 0.5mm to 2mm, respectively.
6. The heart contraction assistance device for heart failure treatment according to claim 1 or 2, wherein the number of the plurality of main spring wires is 8 to 40.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123449267.3U CN218128872U (en) | 2021-12-31 | 2021-12-31 | Heart contraction auxiliary instrument for heart failure treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123449267.3U CN218128872U (en) | 2021-12-31 | 2021-12-31 | Heart contraction auxiliary instrument for heart failure treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218128872U true CN218128872U (en) | 2022-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123449267.3U Active CN218128872U (en) | 2021-12-31 | 2021-12-31 | Heart contraction auxiliary instrument for heart failure treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218128872U (en) |
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2021
- 2021-12-31 CN CN202123449267.3U patent/CN218128872U/en active Active
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