CN218515838U - Elastic spring type ventricular diastole auxiliary device - Google Patents
Elastic spring type ventricular diastole auxiliary device Download PDFInfo
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- CN218515838U CN218515838U CN202220305380.XU CN202220305380U CN218515838U CN 218515838 U CN218515838 U CN 218515838U CN 202220305380 U CN202220305380 U CN 202220305380U CN 218515838 U CN218515838 U CN 218515838U
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Abstract
The utility model discloses an elastic spring type ventricular diastole auxiliary device. The device is used for being mounted on the inner wall of a left ventricle to assist the diastole of the ventricle, and comprises a plurality of inverted V-shaped main spring wires and a plurality of suture rings which are respectively connected with two adjacent main spring wires, wherein the suture rings are used for suturing and fixing the device on the inner wall of the left ventricle at the apex of the heart through suture lines; the main spring wire is made of elastic memory alloy, and the whole size of the device is larger than the size of the inner wall of the left ventricle at the end diastole when the main spring wire is in a natural state. The utility model can reconstruct the three-dimensional geometric model of the heart of the patient according to the diastolic chest image of the diastolic heart failure patient, and extract the geometric model of the inner wall of the ventricle at the end of diastole; amplifying the extracted geometric model of the inner wall of the ventricle according to the illness state of the patient, and taking the amplified geometric model of the inner wall of the ventricle as the geometric outline of the elastic spring type ventricular diastole auxiliary device; thereby manufacturing the individually customized elastic spring type ventricular diastole auxiliary device.
Description
Technical Field
The utility model relates to the technical field of medical equipment, concretely relates to elasticity spring formula ventricle diastole auxiliary device.
Background
Heart failure is a disease that seriously compromises a patient's health and life. The diastolic heart failure patients can have a series of symptoms such as pulmonary venous congestion, dyspnea, tired palpitation, edema, cardiogenic shock and the like, and the life quality and life safety of the patients are seriously affected. The fundamental causes of diastolic heart failure are many, and at present, neurohormonal antagonists are mainly used for treatment, but the treatment effects are greatly different. The traditional ventricular assist device aims at the diastolic heart failure, the working principle of the ventricular assist device is that blood is pumped out from a ventricle and conveyed into an aorta to unload the ventricle, and most of the ventricular assist device does work through a rotary impeller to generate blood flow so as to enhance the blood circulation of a patient.
The traditional ventricular assist device is not suitable for treating diastolic heart failure because the high-speed rotation of the impeller of the traditional ventricular assist device easily causes blood damage, the driving form of an external power supply increases the complexity of a system, reduces the reliability of the system, is difficult to enhance the heart beating function, and the long-term use of the ventricular assist device requires a chest-opening operation for implantation and withdrawal and causes great trauma to a patient.
SUMMERY OF THE UTILITY MODEL
Great, the traditional ventricle auxiliary device of prognosis effect difference to the stress relaxation nature heart failure of medication is not suitable for the problem of treatment stress relaxation nature heart failure, the utility model aims to provide an elasticity spring formula ventricle relaxation auxiliary device, this elasticity spring formula ventricle relaxation auxiliary device can be according to the individualized customization of patient's heart geometric dimension, and supplementary diastole increases the ventricle fast and is sufficient.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an elastic spring type ventricular diastole auxiliary device is used for being installed on the inner wall of a left ventricle to assist the ventricular diastole and comprises a plurality of inverted V-shaped main spring wires and a plurality of sewing rings which are respectively connected with two adjacent main spring wires, wherein the sewing rings are used for fixing the device on the inner wall of the left ventricle at the apex of the ventricle in a sewing mode through sewing threads;
the main spring wire is made of elastic memory alloy, and the whole size of the device is larger than the size of the inner wall of the left ventricle at the end diastole when the main spring wire is in a natural state.
Thus, in a state where the device is attached to the inner wall of the left ventricle, when the ventricle contracts, the entire device contracts by receiving the inward pressing force of the inner wall of the ventricle, and when the ventricle expands, the entire device self-expands and applies an expanding force to the inner wall of the ventricle to assist the ventricular expansion. Because the overall size of the device when the main spring wire is in a natural state is larger than the size of the inner wall of the left ventricle at the end diastole, when the left ventricle relaxes to the maximum volume, the main spring wire is in an inward pressed pre-compression state, and therefore the whole device can be well attached to the inner wall of the ventricle.
Preferably, the plurality of main spring wires are integrally formed with the sewing ring.
Preferably, the diameter of the main spring wire is 1mm-2mm.
Preferably, the overall size of the device is 1.05 to 1.2 times the size of the inner wall of the left ventricle at end diastole when the main spring wire is in a natural state.
The utility model has the advantages that:
the elastic spring type ventricular diastole auxiliary device of the utility model can be compressed to the minimum state to be implanted into the chest cavity through the small incision on the chest wall and the punching of the apex of the heart, thereby avoiding the open chest operation and reducing the trauma of the patient during the implantation operation; the elasticity and the memory of the elastic spring type ventricular diastole auxiliary device ensure that the device does not deform when recovering the original state after being folded, thereby facilitating the implantation in a small incision operation way; the elastic spring type ventricular diastole auxiliary device is arranged on the inner wall of a ventricle and stores elastic energy after being compressed and contracted, and when the compression is weakened or disappears, the device releases the elastic energy by self-rebounding to assist the ventricular diastole, so that the effects of enhancing the cardiac contraction and increasing the ventricular filling are achieved.
The elastic spring type ventricular diastole auxiliary device of the utility model can be customized according to the geometry of the inner wall of the ventricle of the patient, has high fitting degree with the inner wall of the ventricle of the patient, and is beneficial to effectively enhancing the ventricular diastole assistance of the patient; the ventricular diastole is assisted by means of elastic energy storage and release, an external power source is eliminated, pulsating blood can be maintained, and lead infection is avoided.
Drawings
Fig. 1 is a schematic structural diagram of the elastic spring type ventricular diastole auxiliary device of the present invention.
Fig. 2 is a schematic diagram of an image of a chest CT examination of a patient with diastolic heart failure.
Fig. 3 is a schematic diagram showing the entire muscle and fat region in the chest CT examination image of fig. 2.
Fig. 4 is a schematic diagram of the chest CT examination image shown in fig. 3 showing primarily the muscle and fat in the heart region.
Fig. 5 is a schematic structural diagram of a three-dimensional geometric model of a three-dimensional reconstructed left ventricle.
Fig. 6 is a schematic structural diagram of the elastic spring type ventricular diastole auxiliary device of the present invention installed on the inner wall of the left ventricle.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
The utility model discloses an elasticity spring formula ventricle diastole auxiliary device is used for installing and assists the ventricle relaxation at left ventricle inner wall. As shown in fig. 1, the device comprises a plurality of inverted V-shaped main spring wires 1 and a plurality of suturing rings 2 respectively connecting two adjacent main spring wires, as shown in fig. 6, the suturing rings 2 are used for suturing and fixing the device to the inner wall 4 of the left ventricle at the apex by means of sutures 3; the main spring wire 1 is made of elastic memory alloy, and the whole size of the device when the main spring wire is in a natural state is larger than the size of the inner wall of the left ventricle at the end diastole.
In the elastic spring type ventricular diastole auxiliary device of the utility model, the material of the main spring wire includes but is not limited to memory alloys such as nickel-titanium alloy with good blood compatibility. In a state where the device is attached to the inner wall of the left ventricle, when the ventricle contracts, the entire device contracts by receiving an inward pressing force of the inner wall of the ventricle, and when the ventricle expands, the entire device self-expands and applies an expansion force to the inner wall of the ventricle to assist the ventricular expansion. Because the overall size of the device when the main spring wire is in a natural state is larger than the size of the inner wall of the left ventricle at the end diastole, when the left ventricle relaxes to the maximum volume, the main spring wire is in an inward pressed pre-compression state, and therefore the whole device can be well attached to the inner wall of the ventricle.
In the elastic spring type ventricular diastole assist device according to the present invention, as a preferred embodiment of the present invention, a plurality of main spring wires may be integrally formed with the sewing ring. The diameter of the main spring wire is 1mm-2mm. When the main spring wire is in a natural state, the whole size of the device is 1.05 to 1.2 times of the size of the inner wall of the left ventricle at the end diastole.
The utility model provides a method for the elastic spring type ventricular diastole auxiliary device, which can be customized according to the heart size of a heart failure patient. The customization method comprises the following steps: (1) Performing image processing, extraction and three-dimensional reconstruction by adopting a chest CT or nuclear magnetic examination image sequence of a diastolic heart failure patient to obtain a left ventricle three-dimensional geometric model of the heart failure patient, and extracting a ventricle inner wall three-dimensional geometric model at the end of diastole; (2) Amplifying the extracted geometric model of the inner wall of the ventricle according to the illness state of the patient, and taking the amplified geometric model of the inner wall of the ventricle as a geometric outline of the elastic spring type ventricular diastole auxiliary device; (3) The elastic spring type ventricular diastole auxiliary device with the amplified individualized geometric characteristics of the inner wall of the ventricle of the patient is manufactured by adopting the elastic memory alloy.
As shown in fig. 2-5, the specific implementation of the customization method is: firstly, orderly arranging each diastolic CT examination image of a patient according to a spatial axis, extracting gray areas (for example, a dark gray part A1 in figure 3 represents muscle tissue, a white part B1 represents fat tissue; a light gray part A2 in figure 4 represents muscle tissue, and a white part B2 represents fat tissue) of the whole chest representing human fat and muscle tissue according to the characteristics of different tissues corresponding to the gray value range of the CT images, and performing three-dimensional reconstruction to obtain three-dimensional geometric models of the chest wall and each organ in the chest; then, manually operating the muscle and fat regions of each image and the generated three-dimensional geometric model to remove regions except the left ventricle; smoothing and reconstructing a three-dimensional model of a muscle and fat boundary region representing the inner wall of the left ventricle in each image and the three-dimensional geometric model to obtain a three-dimensional geometric model of the inner wall of the left ventricle; and amplifying the three-dimensional geometric model of the inner wall of the left ventricle (the amplification ratio is between 5 and 20 percent according to the diameter of a main spring wire of the elastic spring type ventricular diastole auxiliary device) to be used as a geometric outline of the individually customized elastic spring type ventricular diastole auxiliary device. Finally, the elastic spring type ventricular diastole auxiliary device with the amplified individualized geometric characteristics of the inner wall of the ventricle of the patient is manufactured by adopting the elastic memory alloy.
After the individually customized elastic spring type ventricular diastole auxiliary device is compressed to the minimum state and is implanted into the left ventricle through a small incision on the chest wall and punching of the apex of the heart, the direction of the individually customized elastic spring type ventricular diastole auxiliary device is adjusted to be tightly attached to the inner surface of the ventricle, and the operation suture 3 passing through the suture ring 2 is sutured on the ventricular wall 4 to prevent the device from being greatly displaced when the left ventricle moves in a large amplitude.
The elastic spring type ventricular diastole auxiliary device of the utility model can be compressed to the minimum state to be implanted into the chest cavity through the small incision on the chest wall and the punching of the apex of the heart, thereby avoiding the open chest operation and reducing the trauma of the patient during the implantation operation; the elasticity and the memory of the elastic spring type ventricular diastole auxiliary device ensure that the device does not deform when recovering the original state after being folded, thereby facilitating the implantation in a small incision operation way; the elastic spring type ventricular diastole auxiliary device is arranged on the inner wall of a ventricle and stores elastic energy after being compressed and contracted, and when the compression is weakened or disappears, the device releases the elastic energy by self-rebounding to assist the ventricular diastole, so that the effects of enhancing the cardiac contraction and increasing the ventricular filling are achieved.
The elastic spring type ventricular diastole auxiliary device of the utility model can be customized according to the geometry of the inner wall of the ventricle of the patient, has high degree of fitting with the inner wall of the ventricle of the patient, and is beneficial to effectively enhancing the ventricular diastole assistance of the patient; the ventricular dilatation is assisted by means of elastic energy storage and release, an external power source is eliminated, pulsating blood can be maintained, and lead infection is avoided.
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, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. An elastic spring type ventricular diastole auxiliary device is characterized by being arranged on the inner wall of a left ventricle to assist the ventricular diastole and comprising a plurality of inverted V-shaped main spring wires and a plurality of suture rings which are respectively connected with two adjacent main spring wires, wherein the suture rings are used for suturing and fixing the device on the inner wall of the left ventricle at the apex of the ventricle through sutures;
the main spring wire is made of elastic memory alloy, and the whole size of the device is larger than the size of the inner wall of the left ventricle at the end diastole when the main spring wire is in a natural state.
2. An elastically sprung ventricular diastolic assist device according to claim 1, wherein the plurality of main spring wires are integrally formed with the sewing ring.
3. An elastic spring type ventricular diastole auxiliary device according to claim 1, wherein the diameter of the main spring wire is 1mm-2mm.
4. An elastic spring type ventricular diastole auxiliary device according to claim 1, wherein when the main spring wire is in a natural state, the whole size of the device is 1.05 to 1.2 times of the size of the inner wall of the left ventricle at the end diastole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220305380.XU CN218515838U (en) | 2022-02-15 | 2022-02-15 | Elastic spring type ventricular diastole auxiliary device |
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| CN202220305380.XU CN218515838U (en) | 2022-02-15 | 2022-02-15 | Elastic spring type ventricular diastole auxiliary device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114617676A (en) * | 2022-02-15 | 2022-06-14 | 源深(深圳)医疗器械有限责任公司 | Elastic spring type ventricular diastole auxiliary device and personalized customization method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114617676A (en) * | 2022-02-15 | 2022-06-14 | 源深(深圳)医疗器械有限责任公司 | Elastic spring type ventricular diastole auxiliary device and personalized customization method thereof |
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