CN206979842U - A kind of cardiac pacemaker current provides unit and device - Google Patents
A kind of cardiac pacemaker current provides unit and device Download PDFInfo
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- CN206979842U CN206979842U CN201621405044.3U CN201621405044U CN206979842U CN 206979842 U CN206979842 U CN 206979842U CN 201621405044 U CN201621405044 U CN 201621405044U CN 206979842 U CN206979842 U CN 206979842U
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- pacemaker current
- cardiac pacemaker
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- 230000000747 cardiac effect Effects 0.000 title claims abstract description 54
- 239000012528 membrane Substances 0.000 claims abstract description 28
- 210000004165 myocardium Anatomy 0.000 claims abstract description 21
- 210000001519 tissue Anatomy 0.000 claims abstract description 12
- 210000004413 cardiac myocyte Anatomy 0.000 claims abstract description 3
- 239000011248 coating agent Substances 0.000 claims abstract description 3
- 238000000576 coating method Methods 0.000 claims abstract description 3
- 206010058109 Hangnail Diseases 0.000 claims description 33
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 13
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- 238000000338 in vitro Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
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- 238000005452 bending Methods 0.000 claims 1
- 238000001727 in vivo Methods 0.000 abstract description 9
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- 238000010586 diagram Methods 0.000 description 18
- 239000000463 material Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 229920000747 poly(lactic acid) Polymers 0.000 description 6
- 239000004626 polylactic acid Substances 0.000 description 6
- 238000001356 surgical procedure Methods 0.000 description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
- 229920000954 Polyglycolide Polymers 0.000 description 4
- 238000009954 braiding Methods 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 239000004633 polyglycolic acid Substances 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
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- 230000007062 hydrolysis Effects 0.000 description 3
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- 229910052748 manganese Inorganic materials 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
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- 239000011701 zinc Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 229910000521 B alloy Inorganic materials 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
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- 230000002485 urinary effect Effects 0.000 description 1
- 230000002861 ventricular Effects 0.000 description 1
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- Electrotherapy Devices (AREA)
Abstract
A kind of cardiac pacemaker current provides unit and device, and pacemaker current is provided for the heart of patient, it is characterised in that including：Wire, including conductive core and the dielectric film for coating the conductive core；Suture needle, one end of wire is arranged on, for wire to be fixed on into the external membrane of heart and cardiac muscular tissue through cardiac myocytes；Connection electrode, the other end of wire is arranged on, is connected with pacemaker；And anti-falling piece, the end of the one end being connected on wire with suture needle is arranged on, after anti-falling piece guiding conductive core passes through the external membrane of heart and cardiac muscle, wire of pulling back can make anti-falling piece be firmly anchored to avoid slipping on the external membrane of heart.Its wire is after degradation in vivo without the residue of wire, also metal artifacts will not be produced, so that patient eliminates the necessity for taking-up of performing the operation again, operation is alleviated to spiritual, body caused by patient and more HDs economically, there is very strong clinical value.
Description
Technical field
Cardiac pacing field is the utility model is related to, belongs to medical instruments field.
Background technology
For patient's (bradycardia after such as cardiac operation under direct vision) of transience bradycardia, generally require by surgery hand
The mode of art is implanted into provisional cardiac pacing leads, improves heart rate and cardiac output for early stage after surgery, accelerates postoperative rehabilitation
Process.
However, existing provisional cardiac pacing leads are led using nondegradable medical macromolecular materials and stainless steel
Silk is made, and patient's rhythm of the heart need not continue pacing therapy after recovering normal, but provisional Pacing lead but permanently remains in trouble
In person's body, high-visible when the conventional chest X of work physical examination, premarital checkup etc. is checked, the life to patient causes serious shadow
Ring.
It is fixed in addition, existing provisional cardiac pacing leads need to use by the method to knot by hand in cardiac muscle, no
It is only cumbersome and different degrees of myocardial damage can be caused.
Utility model content
The utility model is to solve the problems, such as that above-mentioned wire needs to knot to fix, it is proposed that a kind of heart with anti-falling piece
Dirty pacemaker current provides unit, and the wire in the utility model is directly anchored at cardiac muscle after implanting by anti-falling piece
On, fixed without knotting, so as to efficiently solve above mentioned problem, not only shorten operating time, also reduce the damage to cardiac muscle
Wound.
A kind of cardiac pacemaker current provides unit, and pacemaker current is provided for the heart of patient, it is characterised in that including：Lead
Line, including conductive core and the dielectric film for coating the conductive core；Suture needle, be arranged on one end of wire, for through cardiac myocytes and
Wire is fixed on the external membrane of heart and cardiac muscular tissue；Connection electrode, the other end of wire is arranged on, is connected with pacemaker；
And anti-falling piece, the end of the one end being connected on wire with suture needle is arranged on, the external membrane of heart is passed through in anti-falling piece guiding conductive core
And after cardiac muscle, wire of pulling back can make anti-falling piece be firmly anchored to avoid slipping on the external membrane of heart.
Cardiac pacemaker current provided by the utility model provides unit, can also have the feature that, it is characterised in that：
Wherein, dielectric film is by PLA (PLA), polyglycolic acid (PGA), pla-pcl (PCL), polydioxanone (PDS), poly- hydroxyl
The film made by any one or above-mentioned at least two copolymer in base fatty acid ester (PHA), conductive core is by magnesium alloy system
Into the quality percentage composition of the magnesium alloy is：Zinc 4.5-5.5%, manganese 0.8-1.2%, calcium 0.8-1.2%, surplus are magnesium,
The material of anti-falling piece is identical with the material of dielectric film or conductive core.
Cardiac pacemaker current provided by the utility model provides unit, can also have the feature that, it is characterised in that：
Wherein, conductive core is knitted to form for single Mg alloy wire or by more Mg alloy wires.
Cardiac pacemaker current provided by the utility model provides unit, can also have the feature that, it is characterised in that：
Wherein, anti-falling piece is hangnail or towards the diminishing gore in suture needle direction.
Cardiac pacemaker current provided by the utility model provides unit, can also have the feature that, it is characterised in that：
Wherein, hangnail is flexible raised item, and the raised item cuts straight length portion and formed or be soldered, be bonded in conductive core by splitting
On, length 2-10mm, thickness 0.1-1mm.
Cardiac pacemaker current provided by the utility model provides unit, can also have the feature that, it is characterised in that：
Wherein, then hangnail welds for being formed by cutting conductive core, or using being process with conductive core identical magnesium alloy materials
Or it is bonded in conductive core.
Cardiac pacemaker current provided by the utility model provides unit, can also have the feature that, it is characterised in that：
Wherein, suture needle is the suture needle of semicircular in shape, and its tail end has the neck of the fixed conductive core of occlusion, and hangnail is to be bent towards suture needle
Arc hangnail.
Cardiac pacemaker current provided by the utility model provides unit, can also have the feature that, it is characterised in that：
Wherein, connection electrode is to be provided with the staight needle of depression, and the staight needle is used to directly pierce through the wall of the chest and expose in vitro, and depression is easy to this straight
Pin is wiped out or fractureed.
The utility model also provides a kind of cardiac pacemaker current and provides device, it is characterised in that including：At least one heart
Pacemaker current provides unit and the pacemaker being connected with cardiac pacemaker current offer unit, wherein, cardiac pacemaker current
Unit is provided and provides unit for above-mentioned cardiac pacemaker current.
Utility model acts on and effect
Unit is provided according to cardiac pacemaker current provided by the utility model, because anti-falling piece has the work for preventing slipping
The external membrane of heart and cardiac muscular tissue are passed through under suture needle guiding with hangnail during, use, wire of pulling back can be such that hangnail is fixed on the external membrane of heart,
Not only effectively prevent wire from deviating from cardiac muscular tissue, and fixed in surgical procedure without knotting by hand, shorten operation
Time, reduce to myocardium damage.
Brief description of the drawings
Fig. 1 is that the cardiac pacemaker current of embodiment one of the present utility model provides the structural representation of unit；
Fig. 2 is the schematic diagram of the hangnail in the suture needle of the utility model embodiment one；
Fig. 3 is the enlarged diagram that suture needle is connected with exposed conductive core by neck；
Fig. 4 is the hangnail schematic diagram obtained by machining；
Fig. 5 is the hangnail schematic diagram obtained by welding method；
Fig. 6 is the cardiac pacemaker current being made up of single magnesium alloy conductive core and dielectric film of the utility model embodiment one
The section of structure of wire is provided；
Fig. 7 is that the suture needle in the anchorage method of embodiment one of the present utility model passes through the external membrane of heart and myocardium schematic diagram；
Fig. 8 is that hangnail after wire of pulling back is anchored on the schematic diagram of the external membrane of heart；
Fig. 9 is the wedge schematic diagram of the triangle in the gore of embodiment two of the present utility model；
Figure 10 is the wedge schematic diagram of rear recess；
Figure 11 is the conductive core and insulation that the more magnesium alloy seal wires braiding in embodiment two of the present utility model forms
The cardiac pacemaker current that film is formed provides the section of structure of wire；And
Figure 12 is gore in the anchorage method of embodiment two of the present utility model showing through the external membrane of heart and cardiac muscle
It is intended to；
Figure 13 is that wire rear triangle block of pulling back is firmly anchored to the schematic diagram of the external membrane of heart.
Embodiment
In order that technological means, creation characteristic, reached purpose and effect that the utility model is realized are easy to understand, with
Lower embodiment combination accompanying drawing to the structure of degradable heart Pacing lead of the present utility model, principle, use step, technique effect
It is specifically addressed.
Embodiment one
The cardiac pacemaker current that the present embodiment provides provides device, including two cardiac pacemaker currents provide the He of unit 100
The pacemaker being connected with cardiac pacemaker current offer unit.It is external that pacemaker is placed in cardiac, is patient
Heart provide pacemaker current.
One end of degradable heart pacing unit 100 that the present embodiment provides is anchored on the external membrane of heart, the other end with it is external
Pacemaker connection.
Fig. 1 is that the cardiac pacemaker current of embodiment one of the present utility model provides the structural representation of unit.
As shown in figure 1, degradable heart pacing unit 100 include be sequentially connected with suture needle 10, wire 20, anti-falling piece 30 with
And connection electrode 40.
Fig. 2 is the schematic diagram of the hangnail in the suture needle of the utility model embodiment one；
Fig. 3 is the enlarged diagram that suture needle is connected with exposed conductive core by neck；
Fig. 4 is the hangnail schematic diagram obtained by machining；
Fig. 5 is the hangnail schematic diagram obtained by welding method.
As shown in Figure 2,3, suture needle 10 is being semicircular stainless steel positioned at front end through the external membrane of heart and cardiac muscular tissue
Medical needle, the tail end of the suture needle, which has, to be used to be engaged fixed neck 11, as shown in Figure 3.
Wire 20, including the dielectric film 22 of conductive core 21 and coated with conductive core.
Anti-falling piece 30, it is in the present embodiment hangnail 31, as shown in figure 3, hangnail 31 is in the arc bent towards suture needle 10
Wire.
The exposed conductive core 21 and hangnail 31 are made using the magnesium alloy materials of people's degradable in vivo.
As shown in figure 4, hangnail 31 is to process what exposed conductive core 21 was formed by Tool in Cutting, such processing method
It is fast, the making suitable for rapid, high volume.In order to ensure the intensity of hangnail, the hangnail of processing is that the raised item length in figure is
2-10mm, thickness 0.1-1.0mm.
As shown in figure 5, hangnail 31 can also be welding or the degradable magnesium alloy silk being bonded in exposed conductive core 21.
The concrete structure of 6 pairs of wires explains below in conjunction with the accompanying drawings.
Fig. 6 is the knot of the wire 20 being made up of single magnesium alloy conductive core and dielectric film of the utility model embodiment one
Structure profile.
Wire 20, as shown in figs. 1 and 6, including the conductive core 21 of people's degradable in vivo and coat the conductive core it is degradable
Dielectric film 22.
The magnesium alloy of the material behaviour degradable in vivo of conductive core 21, the quality percentage composition of the magnesium alloy are：Zinc
4.5%, manganese 0.8%, calcium 0.8%, strontium 0.5%, surplus is magnesium 96.4%.Above-mentioned exposed conductive core 21 in the present embodiment, fall
The material of thorn 31 is identical, and both are same root Mg alloy wires.
Dielectric film 22 is the other polylactic acid PLA of medical grade and polydioxanone PDS copolymer, and the copolymer will entirely be led
Battery core 21 envelopes.
As shown in figure 1, connection electrode 40 is to be provided with the staight needle of depression 41, the staight needle is used to directly pierce through the wall of the chest and expose
In vitro, depression 41 is easy to the staight needle to wipe out or fracture.
Connection electrode 40 is stainless steel, it is illustrated that left end and expose the conductive core 21 of insulator die 22 and connect, the right is
Tip.
Fig. 7 is that the suture needle in the anchorage method of embodiment one of the present utility model passes through the external membrane of heart and myocardium schematic diagram；
Fig. 8 is that hangnail after wire of pulling back is anchored on the schematic diagram of the external membrane of heart；
The application method of the wire of 7,8 pairs of the present embodiment is described in detail as follows below in conjunction with the accompanying drawings：
Operation in use, guide the hangnail on wire through the external membrane of heart and the cardiac muscular tissue of atrium or ventricle with suture needle 11,
As shown in Figure 7.Then, semicircular medical stainless steel suture needle is cut, then wire of pulling back is so that hangnail 31 is tightly fixed to the heart
Avoid slipping on outer membrane, fixed without the knotting in routine operation, shorten operating time, while reduce to cardiac muscle
Damage.
Then, exposed using the tip guiding wire thorn afterbody of connection electrode 40 through the wall of the chest it is external, and from depression 41
Except the connection electrode 40 of part, remaining part is connected place's folding as metal electrode with external pacemaker.
When in use, the pacemaker impulse electric current that pacemaker is sent is entered by connection electrode 40, wire 20 and hangnail 31
Atrium or ventricular muscles are paced.
The degradation process of the Pacing lead of above-described embodiment is as follows：
First, the dielectric film for being arranged on the outer layer of conductive core 21 has good biocompatibility and initial mechanical performance,
In the presence of people's in-vivo tissue liquid, it hydrolysis will occur within the time of setting or enzyme digestion reaction becomes the nothings such as carbon dioxide and water
Human homergy's product of poison, and excreted with urine.After the insulation membrane degradation of external sheath conductive core, metal is led
Battery core is exposed in the tissue fluid in faintly acid (pH 6.7), on the one hand, the current potential of each metal in magnesium alloy is different
, it may occur that electrochemical degradation so that metal degradation is dissolved in tissue fluid for metal ion；On the other hand, by with group
Knit the water in liquid and the electrolyte that hydrolysis forms solubility occurs.
The effect of embodiment and beneficial effect
The cardiac pacemaker current provided according to the present embodiment provides unit, because anti-falling piece has the function that to prevent from slipping,
Hangnail passes through the external membrane of heart and cardiac muscular tissue under suture needle guiding during use, and wire of pulling back can be such that hangnail is fixed on the external membrane of heart, no
Only effectively prevent wire from deviating from cardiac muscular tissue, and fixed in surgical procedure without knotting by hand, when shortening operation
Between, reduce to cardiac muscle damage.
Again due to conductive core material behaviour degradable in vivo therein magnesium alloy and dielectric film is people's degradable in vivo
High-molecular organic material, the dielectric film that outer layer within the regular hour, can be arranged on after use are degraded to nontoxic human body first
The electrolyte that hydrolysis forms solubility occurs for eubolism product small molecule, the magnesium alloy of inner core.And above-mentioned degraded has
Machine small molecule, metal ion and a soluble electrolyte part are absorbed and utilized by the body, and another part then passes through urinary system
System excretes with urine.Therefore metal artifacts will not also be produced so that patient exempts from without the residue of wire in vivo after degrading
Except the necessity for taking-up of performing the operation again, operation is alleviated to spiritual, body caused by patient and more HDs economically, is had
Very strong clinical value.
Further, because connection electrode is to be provided with the staight needle of ring-shaped depression, so it is easy to reveal in the puncture wall of the chest
Staight needle is removed from recess folding after going out in vitro, the negative or positive electrode that its tail end can be directly with external cardiac pacing device is connected, and enters one
Step facilitates operation during surgical, shortens operating time.
Embodiment two
In the present embodiment, and identical structure is given and is identically numbered in embodiment one.
Fig. 9 is the wedge schematic diagram of the triangle in the gore of embodiment two of the present utility model；
Figure 10 is the wedge schematic diagram of rear recess；
Figure 11 is the conductive core and insulation that the more magnesium alloy seal wires braiding in embodiment two of the present utility model forms
The cardiac pacemaker current that film is formed provides the section of structure of wire.
The present embodiment provides a kind of hangnail 31 using in replacement embodiment one corresponding to gore 32, uses three magnesium
The B alloy wire conductive core 21 ' that forms of braiding replaces the wire of single Mg alloy wire conductive core 21 in embodiment.
As shown in Fig. 9,10, suture needle 10 ' and exposed conductive core 21 and be arranged in this section of conductive core 21 towards suture needle
The diminishing gore 32 in 10 ' directions.The exposed conductive core 21 ' uses the magnesium alloy materials system of people's degradable in vivo
Make.The quality percentage composition of the magnesium alloy is：Zinc 5.5%, manganese 1.2%, calcium 1.2%, strontium 2%, surplus are magnesium 90.1%.And
The material of gore 32 is also degradation material, identical with the material of dielectric film.
Gore 32 is set around exposed conductive core 21, sophisticated towards suture needle suture needle 10 '., should as shown in Fig. 9,10
Gore can be the gore that there is depression at rear portion shown in gore or Figure 10 as shown in Figure 9.
As shown in figure 11, conductive core 21 ' is woven or twisted with the Mg alloy wire of sample ingredient by three and exposed conductive core 21
Conjunction forms.
Dielectric film 22 ' is the other polylactic acid PLA of medical grade and polyglycolic acid PGA copolymer, and the copolymer will be whole
Conductive core 21 ' envelopes.
Figure 12 is gore in the anchorage method of embodiment two of the present utility model showing through the external membrane of heart and cardiac muscle
It is intended to；
Figure 13 is that wire rear triangle block of pulling back is firmly anchored to the schematic diagram of the external membrane of heart.
As shown in Figure 12,13, after suture needle suture needle 10 ' guides exposed conductive core 21 ' to pass through myocardium M and external membrane of heart E, three
Angle piece 32 is fixed on the external membrane of heart, so as to be fixed from the knotting in routine operation.
The effect of embodiment and beneficial effect
The cardiac pacemaker current provided according to the present embodiment provides unit, due to the triangle in the present embodiment in suture needle
Shape block has anticreep effect, is fixed in surgical procedure without knotting, and shortens operating time, reduces the damage to cardiac muscle.
Further, because the braiding structure that conductive core is three B alloy wires, intensity are higher.
Claims (8)
1. a kind of cardiac pacemaker current provides unit, pacemaker current is provided for the heart of patient, it is characterised in that including：
Wire, including conductive core and the dielectric film for coating the conductive core；
Suture needle, one end of the wire is arranged on, for the wire to be fixed on into the external membrane of heart and cardiac muscle through cardiac myocytes
Tissue；
Connection electrode, the other end of the wire is arranged on, be connected with the pacemaker；And
Anti-falling piece, the end of the one end being connected on the wire with the suture needle is arranged on,
After the anti-falling piece guides the conductive core to pass through the external membrane of heart and cardiac muscle, the wire of pulling back can make the anti-falling piece tight
Close be anchored on the external membrane of heart and avoid slipping.
2. cardiac pacemaker current according to claim 1 provides unit, it is characterised in that：
Wherein, the conductive core is knitted to form for single Mg alloy wire or by more Mg alloy wires.
3. cardiac pacemaker current according to claim 1 provides unit, it is characterised in that：
Wherein, the anti-falling piece is hangnail or towards the diminishing gore in suture needle direction.
4. cardiac pacemaker current according to claim 3 provides unit, it is characterised in that：
Wherein, the hangnail is flexible raised item, and the raised item cuts straight length portion and formed or be soldered, be bonded in by splitting
In the conductive core, length 2-10mm, thickness 0.1-1mm.
5. cardiac pacemaker current according to claim 3 provides unit, it is characterised in that：
Wherein, the hangnail is to be formed by cutting the conductive core, or use and the conductive core identical magnesium alloy materials
It is process and then welds or is bonded in the conductive core.
6. cardiac pacemaker current according to claim 3 provides unit, it is characterised in that：
Wherein, the suture needle is the suture needle of semicircular in shape, and its tail end has the neck of the fixed conductive core of occlusion,
The hangnail is the arc hangnail towards suture needle bending.
7. cardiac pacemaker current according to claim 1 provides unit, it is characterised in that：
Wherein, the connection electrode is to be provided with the staight needle of depression, and the staight needle is used to directly pierce through the wall of the chest and expose in vitro, described
Depression is easy to the staight needle to wipe out or fracture.
8. a kind of cardiac pacemaker current provides device, it is characterised in that including：
At least one cardiac pacemaker current provides unit and the pacemaker being connected with cardiac pacemaker current offer unit,
Wherein, it is that the cardiac pacemaker current in claim 1-7 described in any one carries that the cardiac pacemaker current, which provides unit,
For unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621405044.3U CN206979842U (en) | 2016-12-20 | 2016-12-20 | A kind of cardiac pacemaker current provides unit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621405044.3U CN206979842U (en) | 2016-12-20 | 2016-12-20 | A kind of cardiac pacemaker current provides unit and device |
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| Publication Number | Publication Date |
|---|---|
| CN206979842U true CN206979842U (en) | 2018-02-09 |
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ID=61421681
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621405044.3U Expired - Fee Related CN206979842U (en) | 2016-12-20 | 2016-12-20 | A kind of cardiac pacemaker current provides unit and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019196294A1 (en) * | 2017-07-19 | 2019-10-17 | 武汉律动医疗科技有限公司 | Three-dimensional atrial septal puncture using guide wires |
| CN110681053A (en) * | 2019-09-29 | 2020-01-14 | 山东大学齐鲁医院(青岛) | Epicardial temporary pacing lead assembly |
-
2016
- 2016-12-20 CN CN201621405044.3U patent/CN206979842U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019196294A1 (en) * | 2017-07-19 | 2019-10-17 | 武汉律动医疗科技有限公司 | Three-dimensional atrial septal puncture using guide wires |
| CN110681053A (en) * | 2019-09-29 | 2020-01-14 | 山东大学齐鲁医院(青岛) | Epicardial temporary pacing lead assembly |
| CN110681053B (en) * | 2019-09-29 | 2022-11-22 | 山东大学齐鲁医院(青岛) | Epicardial temporary pacing lead assembly |
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