CN218128871U - Heart contraction auxiliary instrument - Google Patents

Abstract

The utility model discloses a cardiac contraction auxiliary instrument. The instrument comprises a spring device and an elastic membrane arranged on the spring device, wherein the spring device comprises an annular upper elastic wire, an annular lower elastic wire and a plurality of rebound spring wires which are arranged between the upper elastic wire and the lower elastic wire and uniformly distributed along the circumferential directions of the upper elastic wire and the lower elastic wire, the rebound spring wires are respectively connected to the upper elastic wire through top rings arranged at the end parts of the rebound spring wires and are respectively connected to the lower elastic wire through bottom rings arranged at the other end parts of the rebound spring wires; a plurality of elastic films are symmetrically arranged on the plurality of rebound spring wires. In the instrument, the spring type device and the elastic membrane are arranged on the outer wall of the heart in the contraction period in a pre-expansion state, the spring type device and the elastic membrane are pressed to expand outwards to store elastic energy in the diastole, and the spring type device and the elastic membrane are stressed to be reduced and tend to rebound in the original pre-expansion state in the systole, so that the effects of assisting the systole and increasing the cardiac output are achieved.

Description

Heart contraction auxiliary instrument

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to be applicable to heart failure treatment, reinforcing cardiac contraction function, passive cardiac contraction auxiliary instrument.

Background

The heart failure is mainly manifested as ventricular systolic failure, ejection fraction reduction, difficult maintenance of blood circulation of patients, insufficient blood supply of downstream organs and serious harm to the life health of patients. The ventricle auxiliary device is a device for mechanically assisting the heart of a heart failure patient to do work. The installation of ventricular assist devices has become an effective method for the treatment of heart failure, and the clinical application of ventricular assist devices has successfully cured the lives of many patients with heart failure.

The most of the ventricular assist devices in clinical application at present are rotary blade type ventricular assist devices in direct contact with blood, and the assist principle is that blood in the left or right ventricle is pumped out and conveyed to the aorta through a high-speed rotary impeller to improve cardiac output and blood pressure, so that the effect of unloading the heart of a patient is achieved. Because the components in the device are in contact with blood for a long time and the damage of mechanical force to red blood cells is strong, adverse events such as thrombus, hemolysis, organ embolism and gastrointestinal bleeding in a pump easily occur, and a patient needs to take medicine for a long time after operation. Meanwhile, the external power supply of the ventricular assist device of the type supplies power to drive the rotating impeller, and a data line is also needed for data monitoring and transmission, so that a lead penetrating through the chest cavity of a patient is easy to cause infection. Therefore, the above problems of the current active blood contact heart assist device severely limit the clinical application thereof.

Therefore, the invention of the non-blood contact type passive heart auxiliary device suitable for treating the heart failure patient has important significance for solving the related problems of blood contact, blood damage of an active ventricular auxiliary device and the like.

SUMMERY OF THE UTILITY MODEL

Based on the blood contact that traditional ventricle auxiliary device existed cause blood destruction, wire infection and system complicacy easily to reduce the scheduling problem that device reliability, patient need take medicine for a long time after implanting ventricle auxiliary device, the utility model aims to provide a be applicable to heart failure treatment, reinforcing systolic function, passive cardiac contraction auxiliary device.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a cardiac contraction auxiliary instrument is used for being installed on the outer wall of a heart to assist cardiac contraction and comprises a spring type device and an elastic film arranged on the spring type device, wherein the spring type device comprises an annular upper elastic wire, an annular lower elastic wire and a plurality of rebound spring wires which are arranged between the upper elastic wire and the lower elastic wire and evenly distributed along the circumferential direction of the upper elastic wire and the lower elastic wire, the rebound spring wires are respectively connected to the upper elastic wire through top rings arranged at the end parts of the rebound spring wires and are respectively connected to the lower elastic wire through bottom rings arranged at the other end parts of the rebound spring wires; a plurality of elastic films are symmetrically arranged on the plurality of rebound spring wires.

When the heart contraction auxiliary instrument is arranged on the outer wall of the heart and the heart contracts to the minimum volume, the spring device and the elastic membrane are in a pre-expansion state; in diastole, the spring device and the elastic membrane are pressed to expand outwards and store elastic energy; in the systole, the spring device and the elastic membrane release elastic energy to rebound, and are tightly attached to the outer wall of the heart in the whole diastole and the systole.

The pre-expanded state is a state in which the spring device and the elastic membrane are in a natural state and are smaller than the heart when the heart contracts to a minimum volume, and the spring device and the elastic membrane are in a state in which they are compressed and expanded outward when the heart contracts to a minimum volume.

Preferably, the elastic membrane is arranged on the spring device in a manner of wrapping two adjacent rebound spring wires.

Preferably, the plurality of rebound spring wires are integrally formed with the top ring and the bottom ring, and two adjacent rebound spring wires share one top ring or one bottom ring.

Preferably, the upper elastic wire is connected with a plurality of rebound spring wires in a manner of penetrating through each top ring; the lower elastic spring wire is connected with the plurality of rebound spring wires in a mode of penetrating through each bottom ring.

Preferably, the diameters of the upper elastic wire, the lower elastic wire and the plurality of rebound spring wires are 0.5mm-2mm respectively.

Preferably, the number of the plurality of resilient spring wires is 10-40.

Preferably, the number of the plurality of resilient spring wires is 2 times the number of the elastic membrane.

The utility model has the advantages that:

the utility model discloses a cardiac contraction auxiliary device can be compressed to less size and implant the thorax through the little incision of chest wall, and the wound when reducible operation reduces the damage to the patient, does benefit to and shortens patient recovery phase.

The utility model adopts a spring device and an elastic membrane which have the energy storage characteristic and can be arranged on the outer wall of the heart and can rebound automatically after being expanded under pressure to assist the contraction of the ventricle. The heart contraction auxiliary instrument of the utility model is arranged on the outer wall of the heart, and when the heart contracts to the minimum volume, the spring device and the elastic membrane are in the pre-expansion state; in diastole, the spring device and the elastic membrane are pressed to expand outwards and store elastic energy; in the systole, the spring device and the elastic membrane release elastic energy to rebound, and are tightly attached to the outer wall of the heart in the whole diastole and the systole. Not only can realize the good fit of the device and the heart, but also can assist the heart to contract and increase the cardiac output.

The heart contraction auxiliary instrument of the utility model utilizes the self-resilience performance after expansion to assist the heart contraction, and the elastic membrane wrapped outside the elastic spring wire can enhance the acting area on the heart and reduce the damage to the outer surface of the heart; the rebound spring wire and the elastic membrane release the self rebound force to assist the heart to contract, and the rebound spring wire and the elastic membrane are not in contact with blood and cannot damage the blood; the whole device is passive, an external power source is not needed, the infection is avoided, and the reliability is high; the upper elastic wire and the lower elastic wire can realize the installation and fixation of the device on the outer wall of the heart and prevent the device from falling off.

Drawings

Fig. 1 is a schematic structural diagram of a spring device in the heart contraction assisting apparatus of the present invention.

Fig. 2 is a schematic structural diagram of an elastic membrane in the heart contraction assistance device of the present invention.

Fig. 3 is a schematic structural view of upper and lower elastic wires of the spring device.

Fig. 4 is a structural schematic diagram of a single elastic film wrapping two adjacent resilient spring wires.

Fig. 5 is a schematic structural view of the auxiliary device for cardiac contraction during the systolic phase when the auxiliary device is mounted on the outer wall of the heart.

Fig. 6 is a schematic structural view of the diastolic phase systolic assist 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 heart contraction assisting device of the present invention is used for assisting heart contraction by being installed on the outer wall of the heart, as shown in fig. 1 to 3, the device includes a spring type device 1 and an elastic film 2 arranged on the spring type device, the spring type device 1 includes an annular upper elastic wire 3, an annular lower elastic wire 4, and a plurality of rebound springs 11 which are arranged between the upper elastic wire 3 and the lower elastic wire 4 and uniformly distributed along the circumferential direction of the upper elastic wire 3 and the lower elastic wire 4, the plurality of rebound springs 11 are respectively connected to the upper elastic wire 3 through top rings 12 arranged at the end parts thereof, and are respectively connected to the lower elastic wire 4 through bottom rings 13 arranged at the other end parts thereof; a plurality of elastic membranes 2 are symmetrically provided on the plurality of resilient spring wires 11.

As shown in fig. 1, the plurality of resilient spring wires 11, the top ring 12 and the bottom ring 13 may be formed in an integral manner, and two adjacent resilient spring wires share one top ring or one bottom ring.

As shown in fig. 3, the upper elastic threads 3 and the lower elastic threads 4 are both in a ring structure. The upper spring wire 3 is connected to a plurality of resilient spring wires 11 in such a manner as to pass through top rings 12 of the plurality of resilient spring wires 11 shown in fig. 1; the lower spring wire 4 is connected to the plurality of resilient spring wires 11 in such a manner as to pass through the bottom loops 13 of the plurality of resilient spring wires 11 shown in fig. 1. As shown in fig. 4, the elastic membrane 2 is disposed on the spring device 1 in such a manner as to wrap the adjacent two resilient wires. The wire diameter of the plurality of rebound spring wires 11 is 0.5mm-2mm, the number of the rebound spring wires is 10-40, the number of the elastic films 2 is half of the number of the rebound spring wires 11, and the elastic films are uniformly and symmetrically arranged on the spring type device 1.

The utility model discloses an among the heart contraction auxiliary instrument, the material of return spring wire, apical ring, bottom ring in the spring device includes but not limited to memory metal such as nickel titanium alloy that blood compatibility is good, goes up the material of elastic wire, elastic wire and elastic membrane including but not limited to blood compatibility, the silica gel that elasticity is good etc.. The instrument can be compressed to a smaller size and implanted through a small incision in the chest wall into the chest cavity by: 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 and pushed 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, penetrates through part of the top ring, and is closed into a ring shape after the whole apparatus is sleeved on the outer surface of the heart. At this time, as shown in fig. 3 and 4, the rebound spring wires 11 and the elastic membrane 2 which are uniformly arranged on the spring type device 1 are attached to the outer surface of the heart 5, and the whole instrument is sleeved on the outer surface of the heart to prevent falling off through the upper elastic wires 3 and the lower elastic wires 4 which respectively penetrate through the top ring 12 and the bottom ring 13. When the ventricle relaxes (as shown in fig. 6), the rebound spring wire 11 and the elastic membrane 2 are pressed by the outward expansion of the heart to expand outward, the upper elastic wire 3 and the lower elastic wire 4 are also stretched, the rebound spring wire 11 and the elastic membrane 2 store elastic energy, when the heart contracts (as shown in fig. 5), the rebound spring wire 11 and the elastic membrane 2 rebound inwards to release the elastic energy to assist the heart to contract, and the upper elastic wire 3 and the lower elastic wire 4 also contract along with the rebound spring wire to prevent the instrument from falling off the outer surface of the heart. Since the size of the device in its natural state is smaller than the heart size when the heart volume is at its minimum, the device fits closely to the outer wall of the heart 5 during both diastole and systole.

The utility model discloses a cardiac contraction auxiliary instrument adopts spring formula device and elastic membrane that has energy storage resilience ability after the pressurized expansion to make, installs in the heart outer wall through last elastic wire and lower elastic wire of spring formula device, and the outside inflation storage elastic energy of extrusion that the apparatus received heart outer wall expanding force when patient autologous diastole has stored certain elastic energy during the cardiac contraction return spring silk and elastic membrane inwards kick-backs and tends to the expanded state in advance, supplementary cardiac contraction reinforcing cardiac function.

The heart contraction auxiliary instrument of the utility model utilizes the self-resilience performance after expansion to assist the heart contraction, and the elastic membrane wrapped outside the elastic spring wire can enhance the acting area on the heart and reduce the damage to the outer surface of the heart; the rebound spring wire and the elastic membrane release the self rebound force to assist the heart to contract, and the rebound spring wire and the elastic membrane are not in contact with blood and cannot damage the blood; the whole device is passive, an external power source is not needed, the occurrence of infection is avoided, and the reliability is high; the upper elastic wire and the lower elastic wire can realize the installation and fixation of the device on the outer wall of the heart and avoid the falling of the device.

Finally, it should be noted that the above-mentioned embodiments are preferred embodiments of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A heart contraction assisting instrument is characterized by being installed on the outer wall of the heart to assist the heart to contract and comprising a spring device and an elastic film arranged on the spring device, wherein the spring device comprises an annular upper elastic wire, an annular lower elastic wire and a plurality of rebound spring wires which are arranged between the upper elastic wire and the lower elastic wire and uniformly distributed along the circumferential direction of the upper elastic wire and the lower elastic wire, and the rebound spring wires are connected to the upper elastic wire through top rings arranged at the end parts of the rebound spring wires respectively and connected to the lower elastic wire through bottom rings arranged at the other end parts of the rebound spring wires respectively; a plurality of elastic membranes are symmetrically arranged on the plurality of rebound spring wires.

2. The heart contraction assistance device according to claim 1, wherein the spring means and the elastic membrane are in a pre-expanded state in a state where the device is mounted on an outer wall of a heart and when the heart contracts to a minimum volume; in diastole, the spring device and the elastic membrane are pressed to expand outwards and store elastic energy; in the systole, the spring device and the elastic membrane release elastic energy to rebound, and are tightly attached to the outer wall of the heart in the whole diastole and the systole.

3. A cardiac contraction assistance device according to claim 1 or 2, wherein the elastic membrane is provided on the spring means in a manner to wrap the adjacent two resilient springs.

4. A systole aid according to claim 1 or claim 2, wherein the resilient spring wires are integrally formed with the top and bottom rings, and adjacent resilient spring wires share a top or bottom ring.

5. A device as claimed in claim 1 or 2 wherein the upper spring wire is connected to a plurality of resilient spring wires by being threaded into each top ring; the lower elastic wires are connected with the plurality of rebound spring wires in a mode of penetrating through the bottom rings.

6. The apparatus according to claim 1 or 2, wherein the upper spring wire, the lower spring wire and the plurality of resilient spring wires have diameters of 0.5mm to 2mm, respectively.

7. A systole aid according to claim 1 or claim 2, wherein the number of resilient spring wires is 10-40.

8. The heart contraction assistance device according to claim 7, wherein the number of the plurality of resilient wires is 2 times the number of the elastic membrane.

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