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CN106362288B - Cardiac implant and its fixing means - Google Patents

Cardiac implant and its fixing means Download PDF

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Publication number
CN106362288B
CN106362288B CN201610827308.2A CN201610827308A CN106362288B CN 106362288 B CN106362288 B CN 106362288B CN 201610827308 A CN201610827308 A CN 201610827308A CN 106362288 B CN106362288 B CN 106362288B
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Prior art keywords
cardiac implant
alloy
shell
shape
handgrip
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CN201610827308.2A
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CN106362288A (en
Inventor
郭成军
刘雳宇
魏永祥
袁洁
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61NELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00Electrotherapy; Circuits therefor
    • A61N1/18Applying electric currents by contact electrodes
    • A61N1/32Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/362Heart stimulators
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61NELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00Electrotherapy; Circuits therefor
    • A61N1/18Applying electric currents by contact electrodes
    • A61N1/32Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/372Arrangements in connection with the implantation of stimulators
    • A61N1/37205Microstimulators, e.g. implantable through a cannula

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  • Health & Medical Sciences (AREA)
  • Radiology & Medical Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Cardiology (AREA)
  • Electrotherapy Devices (AREA)
  • Prostheses (AREA)

Abstract

This application discloses a kind of cardiac implant and its fixing means.The cardiac implant includes: shell, and the shell includes side wall and end;The first electrode and second electrode on the shell and being electrically insulated from each other are set;Memorial alloy handgrip on the shell is set, the memorial alloy handgrip includes having for fixed fixing end on the shell and for clamping atrial septum or grasping trabecular muscles/papillary muscle free end, the memorial alloy handgrip through the first shape under conduit transmission state and the second shape in the stationary state.Using memorial alloy handgrip, as fixed device, stability, safety and the practicability of cardiac implant can be improved in the cardiac implant.

Description

Cardiac implant and its fixing means
Technical field
The present invention relates to field of medical device, more particularly, to cardiac implant and its fixing means, mainly for the heart The fixation of room radio micro pacemaker.
Background technique
Cardiac implant is placed in the chambers of the heart, is newest diagnosing and treating means in modern medicine.Heart in the chambers of the heart Implantation material, including the sensor for obtaining the parameters such as electrocardio, blood pressure, blood flow, blood biochemistry, and for execute medicament slow release, The miniature therapeutic equipment of the treatments such as cardiac pacing.In order to which cardiac implant to be placed into the chambers of the heart, need using through intubation intervention Operation, is transmitted to the specific position in the chambers of the heart for implantation material and is fixed, and to prevent cardiac implant from shifting or fall off, makes At complication such as implantation material failure or embolisms.
Pacemaker is widely used human body implant.Nowadays, the whole world has millions of people to pass through implantation every year Artificial cardiac pacemaker helps to maintain the heart normally beat.When doctor implants a pacemaker for patient, usually by heart Pacemaker is placed under thorax flesh, by one or several conducting wires and electrode, is placed into the chambers of the heart, and electrocardio-activity is perceived, and excites the heart Flesh bounce.The each heartbeat of these conducting wires all influences valvular opening and closing, with the passing of time the hemodynamic responses of heart cause mental and physical efforts The complication such as failure.The miniature pacemaker of radio micro heart that foreign countries develop recently, size shape such as medicament capsule are eliminated and are led Line, can be directly placed in the chambers of the heart, not influence valvular opening and closing, and complication is reduced, and is operated and simplified.
It is difficult to how radio micro pacemaker is firmly fixed to the predetermined position in the chambers of the heart.This problem, limit The further development and popularization of the new technology are made.The fixation device of existing radio micro pacemaker, or the spiral shell using active Silk sampling device, precession cardiac muscle in, be easy to cause cardiac perforation, pericardial tamponade, threat to life;Or intra-ventricle is hooked by means of barb Netted myocardial structural is fixed, and is on the one hand easy to fall off, and is caused embolism, another aspect electrode and myocardium poor contact, is influenced Perceive electrocardio and pace-making effect, and lack desmachyme in the atrium in, using existing fixed device, cannot achieve auricular pacemaking with Heart dual chamber pacing, effect, physiological and the safety of pace-making are difficult to be protected.
Summary of the invention
In view of this, it is an object of that present invention to provide the technique device of cardiac implant in the more solid and reliable chambers of the heart and Fixed solution improves safety and the practicability of cardiac implant.
According to an aspect of the present invention, a kind of cardiac implant is provided, comprising: shell, the shell include side wall and end Portion;The first electrode and second electrode on the shell and being electrically insulated from each other are set;Memorial alloy handgrip on the shell, institute are set Stating memorial alloy handgrip includes for fixed fixing end on the shell and for clamping atrial septum or grasping trabecular muscles/nipple The free end of flesh, the memorial alloy handgrip have in the through the first shape under conduit transmission state and in the stationary state Two shapes.
Preferably, the shell one side wall is plane.
Preferably, the fixing end of the first electrode, the second electrode and the memorial alloy handgrip is separately positioned on In the plane of the side wall of the shell.
Preferably, first and second electrode heights are no more than the periphery where shell cambered surface.
Preferably, the first electrode and the fixing end of the memorial alloy handgrip are separately positioned on the end of the shell On, the second electrode is arranged on the side wall of the shell.
It preferably, further include the clamping part for being located at the end of the shell, the clamping part and lasso trick cooperate, to utilize The mobile cardiac implant of lasso trick.
Preferably, the clamping part includes at least one of groove, aperture, loop bar.
Preferably, the memorial alloy handgrip includes in more alloy wires, netted, space frame, hollow tubular Any one.
Preferably, the memorial alloy handgrip includes more alloy wires, and the first shape of the more alloy wires is straight line Shape or rugosity, second shape are curved shape or polyline shaped.
Preferably, the more alloy wires extend in same direction in the state of first shape, in the second shape Extend in different directions under state, to form outcurve anchor-shaped or turn inward the spatial form of claw-like.
Preferably, in the groove that the more alloy wires are contained in cardiac implant outer wall under through conduit transmission state or In the groove of internal surface of sleeve pipe.
Preferably, the part free end in the more alloy wires is stretched out from the end of shell, and in first shape Atrial septum is penetrated through catheter propelling under state, or contact heart mucosal structure such as trabecular muscles or papillary muscle in advance.
Preferably, the part free end in the more alloy wires, after casing is withdrawn in the second shape bending or Folded state, in outcurve anchor-shaped structure or introversion claw-like structures.
Preferably, the more alloy wires include first group of alloy wire and second group of alloy wire, first group of alloy wire Free end be in outcurve anchor-shaped structure, the free end of second group of alloy wire is in introversion claw-like structures.
Preferably, the transition temperature of the memorial alloy handgrip is between room temperature and human body temperature, the more alloys Silk is first shape under transition temperature, and the second shape is reverted on transition temperature.
Preferably, the cardiac implant is slow without the miniature pacemaker of conducting wire, microsensor, Miniature drug selected from heart Release the miniature diagnoses and treatment equipment of one of device.
According to another aspect of the present invention, a kind of fixing means of cardiac implant is provided, the cardiac implant includes Memorial alloy handgrip on the shell is set, which comprises keeps the state of first shape in the memorial alloy handgrip Under, the cardiac implant is sent to through conduit to the predetermined position in the chambers of the heart;And under the action of human body temperature, the note Recall alloy handgrip and restore the second shape, so that the free end clamping atrial septum of the memorial alloy handgrip or grasping/hook hold the heart Intraluminal tissue.
Preferably, the transmission includes: that the cardiac implant is arranged in casing, the inner wall of described sleeve pipe or described Groove on the outer wall of implantation material is for accommodating the memorial alloy handgrip;The cardiac implant is transmitted using described sleeve pipe Predetermined position in the chambers of the heart;And described sleeve pipe and the cardiac implant are separated from each other.
Preferably, the memorial alloy handgrip includes more alloy wires, and the first shape of the more alloy wires is straight line Shape or rugosity, second shape are curved shape or polyline shaped, further includes: at least part in the more alloy wires The free end of alloy wire is stretched out from the end of shell, and in the state of first shape, by least part alloy wire Free end penetrate atrial septum, or dissociate in the contact chambers of the heart in advance structure such as trabecular muscles or papillary muscle.
Preferably, after the penetration step, further includes: restoring the free end of at least partly alloy wire to Two shapes, second shape are the introversion claw-like structures of outcurve or the claw-like of introversion.
Preferably, before the predetermined position that the cardiac implant is sent in the chambers of the heart through conduit, further includes: by lasso trick It is connected to the outer casing end of the cardiac implant;The cardiac implant through conduit be sent to the predetermined position in the chambers of the heart it Afterwards, further includes: using the mobile cardiac implant of the lasso trick;And the lasso trick is separated with the cardiac implant.
Preferably, the lasso trick is separated with the cardiac implant including cutting off lasso trick.
The fixation device implemented according to the present invention, not only cardiac implant itself can with firm contact cardiac muscular tissue, but also The free end of memorial alloy handgrip can clamp atrial septum and grasping/or hook prominent tissue in the chambers of the heart, thus using multiple It contacts site and is anchored and connect common fixation implant, avoid it with heartbeat and blood flow impact displacement and movement.The memorial alloy The fixed effect of handgrip actively and hooks passive mechanism of ammonium fixation, more firm stable than the spiral of existing cardiac implant, from And improve the safety of cardiac implant and practicability in the chambers of the heart.
Detailed description of the invention
Description by referring to the following drawings to the embodiment of the present invention, the above and other purposes of the present invention, feature and Advantage will be apparent from, in the accompanying drawings:
Fig. 1 a and 1b are shown respectively cardiac implant according to a first embodiment of the present invention and are in sleeve and free state When stereoscopic schematic diagram;
Fig. 2 shows the stereoscopic schematic diagrams of cardiac implant according to a second embodiment of the present invention;
Fig. 3 show cardiac implant according to an embodiment of the present invention and interior scheme of installation.
Specific embodiment
The various embodiments that the present invention will be described in more detail that hereinafter reference will be made to the drawings.In various figures, identical element It is indicated using same or similar appended drawing reference.For the sake of clarity, the various pieces in attached drawing are not necessarily to scale.
In following examples, the fixed device of implantation material is described using miniature pacemaker as example.
Fig. 1 a and 1b are shown respectively cardiac implant according to a first embodiment of the present invention and are in sleeve and free state When stereoscopic schematic diagram.
In this embodiment, cardiac implant is miniature pacemaker 100.The miniature pacemaker 100 includes shell 110, the One electrode 111 and second electrode 112.First electrode 111 and second electrode 112 are, for example, the exposure on the side wall of shell 110 Metallic conductor, and be isolated using insulated from each other between insulation spacer 115 and 116 and shell 110.It is wrapped in the inside of shell 110 Include the battery for power supply, the detection circuit for detecting heartbeat state and the electricity of the pulse for generating pulse current Road.When detection circuit detects cardiac arrest, impulse circuit generates pulse current, via first electrode 111 and second Electrode 112 discharges, so that discharge current is flowed through cardiac muscle, cardiac stimulus is beated again.
Miniature pacemaker 100 further includes memorial alloy handgrip.The memorial alloy handgrip is for example including with shape memory spy More alloy wire 121-123 of property.That is, the more alloy wire 121-123 are made of marmem respectively, such as Nitinol (Ni-Ti alloy).Marmem has shape memory characteristic, which is processed into certain shape more than transition temperature Shape is heated to transition temperature or more after being then cooled to transition temperature hereinafter, manually changing its shape, and the alloy is just It can be automatically reverted to the shape being originally processed into more than transition temperature.
Every alloy wire includes the fixing end being fixed on the shell 110 of miniature pacemaker 100 and opposite free end.Choosing The material of shape-selective shape memory alloys makes its transition temperature between room temperature and human body temperature.Near human body temperature, more are closed Spun gold 121-123 is pre-formed into the curved shape along different directions stretching, extension, so that handgrip is collectively formed.Using welding or it is bonded, The fixing end of more alloy wire 121-123 is fixed on the side wall of shell 110.Then, at room temperature, by more alloy wires The shape alloy wire that is in line is straightened in 121-123.Miniature pacemaker 100 is placed on casing.
As shown in Fig. 1 a to 1b, memorial alloy handgrip is linear in the shape of transmission state.Casing not only includes being used for The inner space of miniature pacemaker 100 is accommodated, and forms slot on inner wall, for accommodating memorial alloy handgrip.Alternatively, miniature The outer wall of pacemaker 100 can form slot, and memorial alloy handgrip is folded in the outer wall of miniature pacemaker 100, without Slot is formed in the inner wall of casing.It is appreciated that when transmitting miniature pacemaker 100, miniature pacemaker 100 and memorial alloy handgrip It can connect casing to move in human body together, such as across skin via the atrium dextrum in vein arrival heart.
Further, after the predetermined position that miniature pacemaker 100 reaches atrium dextrum, casing posture is controlled, alloy is made Handgrip front end passes through atrial septum and enters atrium sinistrum, and control casing separates it with miniature pacemaker 100 and memorial alloy handgrip, and Alloy handgrip is set largely to enter atrium sinistrum.Since environment temperature reaches human body temperature, memorial alloy handgrip restores to preform Shape reverts to the alloy wire of curved shape that is, from linear alloy wire.Preferably, more alloy wires of memorial alloy handgrip The preformed shape of 121-123 is different, so that the free end of alloy wire extends to three different directions, from free end Main part to fixing end is arc, to form substantially spherical spatial form.
Miniature pacemaker 100 further includes the clamping part 131 and 132 positioned at two ends of shell 110.The clamping part 131 and 132 cooperate with lasso trick to mobile cardiac implant.In this embodiment, the clamping part 131 and 132 includes ring-type Groove.In alternate embodiments, the clamping part 131 and 132 includes at least one of groove, aperture, loop bar.
Further, when transmitting miniature pacemaker 100, lasso trick is connected to the clamping part of the miniature pacemaker 100 In 131 and 132 groove.After the predetermined position that miniature pacemaker 100 reaches atrium dextrum, paced using lasso trick mobile micro Device 100, so as to adjust the position of miniature pacemaker 100.Then, the lasso trick is separated with miniature pacemaker 100, for example, can To cut off lasso trick.
In this embodiment, miniature pacemaker 100 includes memorial alloy handgrip, be included in transmission state be it is linear and Stationary state reverts to more alloy wires of curved shape.The memorial alloy handgrip of the miniature pacemaker 100 has transmission state With the different shape of stationary state, cardiac implant and its fixed device are sent in human body together to not only improve, again Be conducive to fix its position in human body.As shown in figure 3, not only the side wall of miniature pacemaker 100 connects in the atrium dextrum of heart Netted cardiac muscle in heart, and netted cardiac muscle in the free end in contact heart of more alloy wires of memorial alloy handgrip are touched, thus Miniature pacemaker 100 is fixed jointly using multiple contact positions, it is avoided arbitrarily to move.The fixed effect of the memorial alloy handgrip It is more more reliable and stable than existing miniature Placing cardiac pacemaker mode, to improve the safety of people's intracorporeal heart implantation material and practical Property.
In the above-described embodiment, the shape for describing more alloy wires in transmission state is linear.In the reality of substitution It applies in example, if the length of alloy wire is longer, for the ease of transmission, more alloy wires can be broken line in the shape of opening of transmission state Shape.Further, in alternate embodiments, memorial alloy handgrip can be any of netted, space frame, hollow tubular Kind.
Fig. 2 shows the stereoscopic schematic diagrams of cardiac implant according to a second embodiment of the present invention.
In this embodiment, cardiac implant is miniature pacemaker 200.The miniature pacemaker 200 includes shell 210, the One electrode 211 and second electrode 212.First electrode 211 and second electrode 212 are, for example, on the end and side wall of shell 210 Exposed metallic conductor, and be isolated using insulated from each other between insulation spacer 115 and 116 and shell 210.Second electrode 212 It can be directly as a part of shell 210.It include being jumped for the battery of power supply, for detecting heart in the inside of shell 210 The detection circuit of dynamic state and impulse circuit for generating pulse current.Cardiac arrest is detected in detection circuit When, impulse circuit generates pulse current, discharges via first electrode 211 and second electrode 212, so that discharge current is flowed through the heart Flesh, cardiac stimulus are beated again.
Miniature pacemaker 200 further includes memorial alloy handgrip.The memorial alloy handgrip is for example including with shape memory spy More alloy wire 221-226 of property.
The memorial alloy handgrip and the miniature pacemaker in first embodiment of miniature pacemaker 200 according to the second embodiment 200 memorial alloy handgrip the difference is that, in a second embodiment, memorial alloy handgrip includes two groups of alloy wires, with First electrode 221 is arranged on the same end of shell 210, and the fixing end of two groups of alloy wires is distributed in the periphery of shell 210 On, and free end is stretched out from the end of shell 210.First group of alloy wire 221-223 and second group of edge alloy wire 224-226 Miniature pacemaker 200 it is radially spaced apart.As previously mentioned, the shape of the alloy wire under the stationary state is more than transition temperature Preformed shape.
The shape of more piece alloy wire 221-226s of the memorial alloy handgrip under transmission state is linear.In miniature pace-making After device 200 reaches the predetermined position of right ventricle, it is pushed further into miniature pacemaker 200, so that more alloy wire 221-226 Free end is pierced into netted cardiac muscle in heart.Then, casing is separated with miniature pacemaker 200.Since environment temperature reaches human temperature Degree, memorial alloy handgrip restore to revert to the alloy wire of curved shape that is, from linear alloy wire to preforming shape.Solid Determine under state, the free end of first group of alloy wire 221-223 is introversion claw-like structures, the freedom of second group of alloy wire 224-226 End is outcurve anchor-shaped structure.Preferably, each not phase of the preformed shape of first group of alloy wire 221-223 of memorial alloy handgrip It together, is arc from free end to the main part of fixing end so that the free end of alloy wire extends to three different directions.The Restore to introversion claw-like structures the free end of one group of alloy wire 221-223.Second group of alloy wire 224-226 of memorial alloy handgrip Preformed shape it is different so that the free end of alloy wire extends to three different directions, from free end to fixation The main part at end is arc.Restore to outcurve anchor-shaped the free end of second group of alloy wire 224-226.
In this embodiment, miniature pacemaker 200 includes memorial alloy handgrip, be included in transmission state be it is linear and Stationary state reverts to more alloy wires of curved shape.The memorial alloy handgrip of the miniature pacemaker 200 has transmission state With the different shape of stationary state, cardiac implant and its fixed device are sent in human body together to not only improve, again Be conducive to fix its position in human body.It is not only netted in miniature 200 self-contact heart of pacemaker in the atrium sinistrum of heart Cardiac muscle, and the free end of first group of alloy wire of memorial alloy handgrip reverts to introversion claw-like structures, passes through a part of heart Interior netted cardiac muscle forms firm anchoring connection, and the free end of second group of alloy wire reverts to curved shape, netted in heart Myocardial surface forms contact position, so as to fix miniature pacemaker 200 jointly using contact position and anchoring connection, avoids It is arbitrarily moved.The fixed effect of the memorial alloy handgrip is more more reliable and stable than existing miniature Placing cardiac pacemaker mode, from And improve safety and the practicability of people's intracorporeal heart implantation material.
It is as described above according to the embodiment of the present invention, these embodiments details all there is no detailed descriptionthe, also not Limiting the invention is only the specific embodiment.Obviously, as described above, can make many modifications and variations.This explanation These embodiments are chosen and specifically described to book, is principle and practical application in order to better explain the present invention, thus belonging to making Technical field technical staff can be used using modification of the invention and on the basis of the present invention well.Therefore, if this hair Within the scope of the claims of the present invention and its equivalent technology, then the present invention is also intended to encompass these bright modification and variations Including these modification and variations.

Claims (12)

1. a kind of cardiac implant, comprising:
Shell, the shell include side wall and end;
The first electrode and second electrode on the shell and being electrically insulated from each other are set;
Memorial alloy handgrip on the shell is set, the memorial alloy handgrip include for fixed fixing end on the shell and For clamping atrial septum or grasping trabecular muscles/papillary muscle free end, the memorial alloy handgrip has to be transmitted through conduit First shape under state and the second shape in the stationary state,
Wherein, the fixing end of the first electrode, the second electrode and the memorial alloy handgrip is separately positioned on described outer On the side wall of shell.
2. cardiac implant according to claim 1 further includes the clamping part positioned at the end of the shell, the clamping Portion and lasso trick cooperate, to utilize the mobile cardiac implant of lasso trick.
3. cardiac implant according to claim 2, wherein the clamping part include groove, aperture, in loop bar at least It is a kind of.
4. cardiac implant according to claim 1, wherein the memorial alloy handgrip include selected from more alloy wires, Any one in netted, space frame, hollow tubular.
5. cardiac implant according to claim 4, wherein the memorial alloy handgrip includes more alloy wires, described The first shape of more alloy wires is linear or rugosity, and second shape is curved shape or polyline shaped.
6. cardiac implant according to claim 5, wherein the more alloy wires are in the state of first shape along phase Same direction extends, and extends in different directions in the state of the second shape, to form outcurve anchor-shaped or turn inward claw-like Spatial form.
7. cardiac implant according to claim 6, wherein the more alloy wires accommodate under through conduit transmission state In the groove of cardiac implant outer wall or in the groove of internal surface of sleeve pipe.
8. cardiac implant according to claim 5, wherein part free end in the more alloy wires is from shell End is stretched out, and penetrates atrial septum through catheter propelling in the state of first shape, or contact heart mucosal structure such as in advance Trabecular muscles or papillary muscle.
9. cardiac implant according to claim 8, wherein the part free end in the more alloy wires, in casing Bending or folded state after withdrawing in the second shape, in outcurve anchor-shaped structure or introversion claw-like structures.
10. cardiac implant according to claim 5, wherein the more alloy wires include first group of alloy wire and the The free end of two groups of alloy wires, first group of alloy wire is in outcurve anchor-shaped structure, and the free end of second group of alloy wire is in Turn inward claw-like structures.
11. cardiac implant according to claim 5, wherein the transition temperature of the memorial alloy handgrip is located at room temperature Between human body temperature, the more alloy wires are first shape under transition temperature, and the is reverted on transition temperature Two shapes.
12. cardiac implant according to claim 1, wherein the cardiac implant is miniature without conducting wire selected from heart The miniature diagnoses and treatment equipment of one of pacemaker, microsensor, Miniature drug slow release device.
CN201610827308.2A 2016-09-14 2016-09-14 Cardiac implant and its fixing means Active CN106362288B (en)

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CN106362288B true CN106362288B (en) 2019-06-11

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CN107583187B (en) * 2017-09-25 2020-04-10 创领心律管理医疗器械(上海)有限公司 Leadless pacemaker system and method of use
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US11660444B2 (en) 2018-07-31 2023-05-30 Manicka Institute Llc Resilient body component contact for a subcutaneous device
US10716511B2 (en) 2018-07-31 2020-07-21 Manicka Institute Llc Subcutaneous device for monitoring and/or providing therapies
JP2021532956A (en) * 2018-07-31 2021-12-02 カルヤン テクノロジーズ, インコーポレーテッドCalyan Technologies, Inc. Subcutaneous device
CN110870948B (en) 2018-08-31 2021-11-05 创领心律管理医疗器械(上海)有限公司 Delivery device, cardiac pacing device and fixing structure thereof
CN109512546B (en) * 2018-09-29 2021-05-04 北京航空航天大学 Covered stent and manufacturing method thereof
CN109621202A (en) * 2019-01-30 2019-04-16 祝金明 It is a kind of to be implanted into automatic fixed plate-like head end ventricular defibrillation pacing electrode wire through vein
CN109621189A (en) * 2019-01-30 2019-04-16 祝金明 It is a kind of to be implanted into automatic fixed head end diplocardia room synchronous pacing electrode cable through vein
CN109621190A (en) * 2019-01-30 2019-04-16 祝金明 It is a kind of to be implanted into automatic fixed head end biventricular synchronous pacing electrode cable through vein
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