CN106510807B - Pericardial puncture needle assembly and pericardial puncture kit - Google Patents
Pericardial puncture needle assembly and pericardial puncture kit Download PDFInfo
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- CN106510807B CN106510807B CN201611099457.8A CN201611099457A CN106510807B CN 106510807 B CN106510807 B CN 106510807B CN 201611099457 A CN201611099457 A CN 201611099457A CN 106510807 B CN106510807 B CN 106510807B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3415—Trocars; Puncturing needles for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3494—Trocars; Puncturing needles with safety means for protection against accidental cutting or pricking, e.g. limiting insertion depth, pressure sensors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B2017/3454—Details of tips
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
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Abstract
The utility model relates to a pericardial puncture needle assembly and a pericardial puncture sleeve group in the field of medical appliances, and the pericardial puncture needle assembly comprises a needle sleeve and a needle core sleeved in the needle sleeve, wherein the needle core comprises a needle head, a support section, a needle body and a connecting wire; the pericardium puncture kit comprises a puncture needle assembly, a guide wire, a puncture sheath tube and an expansion sheath, and the puncture needle assembly and the pericardium puncture kit provided by the utility model are convenient for a practitioner to master the puncture depth, are convenient to operate, and are safe and reliable.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to a pericardial puncture needle assembly and a pericardial puncture sleeve set.
Background
The pericardium is a layer of connective tissue membrane structure that surrounds the heart. The pericardium has two layers of connective tissue, the outer layer is wall pericardium, the inner layer is heart pericardium, and the gap between two pericardium layers is pericardium cavity. The pericardial puncture is a diagnosis and treatment technology for directly puncturing the pericardial cavity by means of a puncture needle, is commonly used for effusion drainage in the treatment of acute pericardial soil obstruction, and is also a main means for pericardial effusion test sampling and pericardial medicine injection.
The existing pericardial puncture needle is unreasonable in design, and is easy to cause puncture-related complications such as pericardial tamponade, coronary artery injury, myocardial injury and the like. Therefore, a novel puncture needle is designed to reduce pericardial puncture complications, and ensuring the safety of patients is a current focus.
Attempts have been made to improve the puncture needle in clinic to improve the puncture safety, such as the pericardial puncture needle disclosed in chinese patent No. CN201120319310.1, which comprises a needle sleeve, a needle core and a hub disposed at the end of the needle sleeve; the needle sleeve is a flexible sleeve sleeved outside the needle core in an inner hollow manner, and the needle core is of a solid stainless steel structure. After the needle core pierces the pericardium, the needle core is withdrawn, the needle sleeve is continuously sent into the pericardial cavity, and pericardial effusion is extracted or medicines are injected.
However, the puncture needle has a straight integrated needle structure, and in clinical practice, it is difficult to grasp the puncture depth, and the puncture is often failed due to the lack of in-place needle insertion, and the cardiac muscle or the important blood vessel is sometimes punctured due to the too deep needle insertion.
Disclosure of Invention
In order to solve the technical problems, the utility model provides the pericardium puncture needle assembly and the pericardium puncture kit which are convenient for an operator to master the puncture depth, convenient to operate, safe and reliable.
The utility model provides a pericardium puncture needle subassembly, includes the needle sleeve, endotheca in the needle core in the needle sleeve, the needle core includes syringe needle, support section, needle body and connecting wire, support section and needle body all are equipped with axial hole, the tail end fixed connection of connecting wire one end and syringe needle, the other end pass the axial hole of support section and the axial hole of needle body in proper order, support section and needle body all overlap on the connecting wire and can follow connecting wire length direction free movement, the connecting wire is made by inelastic flexible material, the material of connecting wire optional rayon, and the connecting wire toughness is better, difficult fracture to buckle easily, the needle core length is greater than needle sleeve length.
Further, the other end of the connecting wire is a free end or is connected with the fixed block, the connecting wire is connected with the fixed block, the subsequent folding operation can be facilitated, and meanwhile the danger that the needle core head end is separated into the pericardial cavity and cannot be retracted is effectively avoided.
Further, the connecting wire is provided with scale marks along the length direction of the connecting wire, the scale marks on the connecting wire are convenient for operators to observe the position of the tail end of the connecting wire relative to the needle body, and the shortening phenomenon in the connecting wire operation process can be judged.
Further, the number of the supporting sections is more than or equal to 1, preferably 4-10, more preferably 4, and in the puncturing process, when the 4 supporting sections enter the pericardium, obvious shortening phenomenon of connecting lines can be seen, and the damage of the needle body to the pericardium in the puncturing process is effectively avoided; the number of the support sections is too small, the shortening phenomenon of the connecting wire is not obvious in the puncturing process, the needle body is longer, and the probability of damaging the pericardium of the visceral layer by the needle body is larger; the number of the supporting sections is too large, the needle core structure is complex, and the manufacturing cost is high.
Further, the support section has a parallelogram or arrow-shaped axial cross section.
Further, when the needle head, the support segment and the needle body are folded by the connecting line, the needle head, the support segment and the needle body are in surface contact, and the contact surface is a plane or a curved surface.
Further, the contact area among the furled needle, the supporting segment and the needle body is larger than the cross-section area of the needle core at the corresponding position, and the larger contact area is beneficial to increasing the furled state and the supporting force among the needle, the supporting segment and the needle body.
Further, the head end of the needle head is of a pointed structure, and the pointed structure is convenient for the needle core to pierce the pericardium of the wall layer, so that the damage to surrounding tissues is reduced.
Further, the needle head end is cone-shaped.
Further, the length of the needle head is 2-5mm, the length of the supporting section is 2-5mm, and the length of the needle body is 80-120mm.
Further, the tail end of the needle core is provided with a needle core joint for pushing and holding the needle, and the tail part of the needle sleeve is provided with a needle sleeve joint matched with the needle core joint.
A pericardial puncture kit comprising:
a pericardial puncture needle assembly;
the guide wire is provided with a J-shaped structure at the head end;
the puncture sheath is characterized in that the head end of the puncture sheath is an elastic hose, a plurality of side holes are formed in the hose part at the head end, the tail end of the puncture sheath is a hard hose body, the tail end of the puncture sheath is connected with a hemostatic valve, and the side surface of the hemostatic valve is provided with a three-way valve connected through a rubber tube;
the expansion sheath is of a hard hollow structure, the outer diameter of the expansion sheath is smaller than the inner diameter of the puncture sheath, the expansion sheath can be arranged in the puncture sheath in a penetrating mode and has an expansion effect, and a hemostatic valve is arranged at the tail end of the puncture sheath.
The using method of the puncture needle assembly comprises the following operation steps: in the puncturing process, the needle sleeve is firstly placed at a preset puncturing point to align with the direction, and then the needle core is folded through the connecting wire and placed in the needle sleeve to push the needle core forwards along the direction of the needle sleeve. Before the needle core does not enter the pericardial cavity, the needle core, the support section and the needle body can keep a folded state due to the pressure bearing of the needle head of the needle core, and the needle is advanced along the needle sleeve. When the needle head of the needle core pierces the wall-broken layer pericardium, the needle head and the supporting section gradually enter the pericardium cavity, the pressure applied by the needle head and the supporting section can disappear, and the heart moves, so the head end of the needle head and the supporting section can be automatically extruded to the side edge, the head end of the needle core loses support and extends into the pericardium cavity, the needle continues to enter, the supporting section entering the pericardium cavity only extends along the needle head into the pericardium cavity, and the force at the tail end of the needle core cannot be transmitted to the head end due to softer connecting wires, so the needle core cannot damage heart muscles.
At the same time, after the head end of the needle core enters the pericardial cavity, the pressure between the needle head and the supporting segment can disappear, the needle head moves towards the inside of the pericardial cavity, the connecting wire can move towards the head end along with the needle head, the tail end of the connecting wire can be shortened, the specific shortening distance can be calculated by reading the change of the scale values on the connecting wire, when an operator observes the shortening phenomenon of the tail end of the connecting wire, the fact that the needle head of the needle core has penetrated broken wall layer pericardium and enters the pericardial cavity can be judged.
After the head end of the needle core enters the pericardial cavity, the needle sleeve is pushed into the pericardial cavity along the needle core, then the needle core is pulled out and put into the guide wire, and the X-ray is used for confirming that the guide wire is in the pericardial cavity, so that the puncture is completed.
Compared with the prior art, the puncture needle assembly can better master the puncture depth, the puncture needle assembly can directly and uniformly insert the needle in the puncture process, the needle head can be known to enter the pericardial cavity as long as the tail end of the connecting wire is observed to be shortened, the needle can be inserted continuously, the head end of the needle core can move towards the interior of the pericardial cavity due to the loss of the supporting force of the connecting wire, the needle insertion is not required to be too deep to stab cardiac muscle or important blood vessels, and the safety and the operation success rate of pericardial puncture operation are greatly improved.
The using method of the puncture needle assembly comprises the following steps that a guide wire is placed into the combination of the puncture sheath and the expansion sheath, after the puncture sheath and the expansion sheath are confirmed to enter the pericardial cavity, the expansion sheath and the guide wire are withdrawn, the direction and the depth of the puncture sheath are adjusted, and then pericardial drainage or epicardial electrophysiological operation can be performed.
Drawings
FIG. 1 is a schematic view showing the overall structure of a pericardial puncture needle assembly according to an embodiment of the present utility model;
FIG. 2 is a schematic view of a needle hub of a pericardial puncture needle assembly according to an embodiment of the present utility model;
FIG. 3 is a schematic view showing a core-retracted state of a pericardial puncture needle assembly according to an embodiment of the present utility model;
FIG. 4 is a schematic view showing a non-collapsed configuration of a core of a pericardial puncture needle assembly according to an embodiment of the present utility model;
the reference numerals are listed below: needle sleeve 1, needle head 2, support segment 3, needle body 4, connecting wire 5, needle sleeve joint 6, needle core joint 7, fixed block 8.
Detailed Description
The following is a further description of the technical aspects of the pericardial puncture needle assembly according to the present utility model, taken in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present utility model and practice it.
Referring to fig. 1, 2, 3 and 4. The utility model provides a pericardial puncture needle assembly, which comprises a needle sleeve 1, and a needle core sleeved in the needle sleeve 1, wherein the needle core comprises a needle head 2, a support section 3, a needle body 4 and a connecting wire 5, the support section 3 and the needle body 4 are respectively provided with an axial hole, one end of the connecting wire 5 is fixedly connected with the tail end of the needle head 2, the other end sequentially passes through the axial holes of the support section 3 and the axial holes of the needle body 4, the support section 3 and the needle body 4 are sleeved on the connecting wire 5 and can freely move along the length direction of the connecting wire 5, the connecting wire 5 is made of inelastic flexible materials, the material of the connecting wire 5 is artificial fiber, the connecting wire has good toughness and is not easy to break, is flexible and is easy to bend, the length of the connecting wire 5 is larger than the total length of the needle core, and the length of the needle core is larger than the length of the needle sleeve 1.
Further, the other end of the connecting wire 5 is a free end or is connected with the fixed block 8, the connecting wire 5 is connected with the fixed block 8, so that the subsequent folding operation can be facilitated, and the danger that the needle core head end is separated into the pericardial cavity and cannot be retracted is effectively avoided.
Further, the connecting wire 5 is provided with scale marks along the length direction of the connecting wire 5, the scale marks on the connecting wire 5 are convenient for an operator to observe the position of the tail end of the connecting wire 5 relative to the needle body 4, and the shortening phenomenon in the operation process of the connecting wire 5 can be judged.
Further, the number of the supporting sections 3 is greater than or equal to 1, preferably 4-10, more preferably 4, and for the puncture needle assembly with 4 supporting sections 3, in the puncture process, when the 4 supporting sections 3 enter the pericardium, the obvious shortening phenomenon of the connecting line 5 can be seen, so that the damage of the needle body 4 at the tail end of the needle core to the pericardium in the puncture process is effectively avoided; the number of the supporting sections 3 is too small, the shortening phenomenon of the connecting wire 5 is not obvious in the puncturing process, the needle body 4 is longer, and the probability of the needle body 4 damaging the pericardium of the visceral layer is larger; when the number of the supporting sections 3 is too large, the needle core structure is complex, and the manufacturing cost is high.
Further, the axial section of the supporting section 3 is parallelogram or arrow-shaped, preferably arrow-shaped, and the arrow-shaped structure is convenient for increasing the contact area among the needle head 2, the supporting section 3 and the needle body 4, and is favorable for increasing the supporting force among the needle head 2, the supporting section 3 and the needle body 4 in a furled state.
Further, when the needle head 2, the supporting section 3 and the needle body 4 are folded by the connecting wire 5, the needle head 2, the supporting section 3 and the needle body 4 are in surface contact, and the contact surface is a plane or a curved surface.
Further, the contact area between the furled needle 2, the support section 3 and the needle body 4 is larger than the cross-sectional area of the needle core at the corresponding position. The larger contact area facilitates an increased holding force between the needle 2, the holding section 3 and the needle body 4 in the collapsed state.
Further, the head end of the needle head 2 is in a pointed structure. The pointed structure is convenient for the needle core to pierce the pericardium of the wall layer, so that the damage to surrounding tissues is reduced.
Further, the head end of the needle 2 is cone-shaped.
Further, the length of the needle head 2 is 2-5mm, the length of the supporting section 3 is 2-5mm, and the length of the needle body 4 is 80-120mm.
Further, the tail end of the needle core is provided with a needle core joint 7 for pushing and holding the needle, and the tail part of the needle sleeve 1 is provided with a needle sleeve joint 6 matched with the needle core joint 7.
A pericardial puncture kit comprising:
a pericardial puncture needle assembly;
the guide wire is provided with a J-shaped structure at the head end;
the puncture sheath is characterized in that the head end of the puncture sheath is an elastic hose, a plurality of side holes are formed in the hose part at the head end, the tail end of the puncture sheath is a hard hose body, the tail end of the puncture sheath is connected with a hemostatic valve, and the side surface of the hemostatic valve is provided with a three-way valve connected through a rubber tube;
the expansion sheath is of a hard hollow structure, the outer diameter of the expansion sheath is smaller than the inner diameter of the puncture sheath, the expansion sheath can be arranged in the puncture sheath in a penetrating mode and has an expansion effect, and a hemostatic valve is arranged at the tail end of the puncture sheath.
The using method of the puncture needle assembly comprises the following operation steps: in the puncturing process, the needle sleeve 1 is firstly placed at a preset puncturing point and aligned with the direction, and then the needle core is folded and placed in the needle sleeve 1 through the connecting wire 5, and the needle core is pushed forward along the direction of the needle sleeve 1. Before the core does not enter the pericardial cavity, the needle 2, the support section 3 and the needle body 4 remain in a collapsed state due to the pressure of the needle head 2 of the core and advance the needle along the needle sleeve 1. When the needle head 2 of the needle core pierces the pericardium of the broken wall layer, the needle head 2 and the supporting section 3 gradually enter the pericardium cavity, the pressure born by the needle head 2 and the supporting section 3 can disappear, the heart moves, the head ends of the needle head 2 and the supporting section 3 can be automatically extruded to the side edges, the head end of the needle core loses support and extends into the pericardium cavity, the needle is continuously inserted, the supporting section 3 entering the pericardium cavity can extend into the pericardium cavity along with the needle head 1, and the force at the tail end of the needle core cannot be transmitted to the head end because the connecting wire 5 is softer, so that the needle core cannot damage cardiac muscles.
At the same time, after the head end of the needle core enters the pericardial cavity, the pressure between the needle head 2 entering the pericardial cavity and the supporting segment 3 can disappear, the needle head 2 moves towards the inside of the pericardial cavity, the connecting wire 5 moves towards the head end along with the needle head 2, the tail end of the connecting wire 5 can be shortened, the specific shortening distance can be calculated by reading the change of the scale value on the connecting wire 5, when an operator observes the shortening phenomenon of the tail end of the connecting wire 5, the needle head 2 of the needle core can be judged to have penetrated the pericardium of the broken wall layer and enter the pericardial cavity.
After the head end of the needle core enters the pericardial cavity, the needle sleeve 1 is pushed into the pericardial cavity along the needle core, then the needle core is pulled out and put into the guide wire, and the X-ray is used for confirming that the guide wire is in the pericardial cavity, so that the puncture is completed.
The using method of the puncture needle set comprises the following steps of placing a puncture sheath and an expansion sheath along a guide wire, withdrawing the expansion sheath and the guide wire after confirming that the puncture sheath and the expansion sheath enter a pericardial cavity, adjusting the direction and the depth of the puncture sheath, and then performing pericardial drainage or epicardial electrophysiological operation.
The embodiments described in the present specification are merely examples of implementation forms of the inventive concept, and the scope of protection of the present utility model should not be construed as being limited to the specific forms set forth in the embodiments, and the scope of protection of the present utility model and equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.
Claims (8)
1. The utility model provides a pericardium puncture needle subassembly convenient to observe puncture degree of depth, includes needle sleeve (1), endotheca in the nook closing member in needle sleeve (1), its characterized in that: the needle core comprises a needle head (2), a supporting section (3), a needle body (4) and a connecting wire (5), wherein the supporting section (3) and the needle body (4) are respectively provided with an axial hole, one end of the connecting wire (5) is fixedly connected with the tail end of the needle head (2), the other end of the connecting wire sequentially penetrates through the axial holes of the supporting section (3) and the axial holes of the needle body (4), the supporting section (3) and the needle body (4) are sleeved on the connecting wire (5) and can freely move along the length direction of the connecting wire (5), the connecting wire (5) is made of an inelastic flexible material, and the length of the needle core is greater than that of the needle sleeve (1); the puncture needle assembly can better master the puncture depth, the puncture needle is directly and uniformly inserted in the puncture process, the needle head can be known to enter the pericardial cavity as long as the tail end of the connecting wire is observed to be shortened, the needle can be continuously inserted, the head end of the needle core can move towards the interior of the pericardial cavity due to the loss of the supporting force of the connecting wire, the worry that the needle is inserted too deeply to stab cardiac muscle or important blood vessels is avoided, the other end of the connecting wire (5) is a free end or is connected with a fixed block (8), and the connecting wire (5) is provided with scale marks along the length direction of the connecting wire (5).
2. The pericardial puncture needle assembly according to claim 1, wherein: the number of the support sections (3) is greater than or equal to 1.
3. The pericardial puncture needle assembly according to claim 1, wherein: the number of the support sections (3) is 4.
4. The pericardial puncture needle assembly according to claim 1, wherein: the axial section of the supporting section (3) is parallelogram or arrow-shaped.
5. The pericardial puncture needle assembly according to claim 1, wherein: when the needle head (2), the support section (3) and the needle body (4) are folded by the connecting wire (5), the needle head (2), the support section (3) and the needle body (4) are in surface contact.
6. The pericardial puncture needle assembly according to claim 5, wherein: in the folded state, the contact area among the needle head (2), the supporting section (3) and the needle body (4) is larger than the cross-section area of the needle core at the corresponding position.
7. The pericardial puncture needle assembly according to claim 1, wherein: the head end of the needle head (2) is of a pointed structure.
8. A pericardial puncture set, comprising:
a needle assembly, said needle assembly being a pericardial needle assembly according to any one of claims 1-7;
the guide wire is provided with a J-shaped structure at the head end;
the puncture sheath is characterized in that the head end of the puncture sheath is an elastic hose, a plurality of side holes are formed in the hose part at the head end, the tail end of the puncture sheath is a hard hose body, the tail end of the puncture sheath is connected with a hemostatic valve, and the side surface of the hemostatic valve is provided with a three-way valve connected through a rubber tube;
the expansion sheath is of a hard hollow structure, the outer diameter of the expansion sheath is smaller than the inner diameter of the puncture sheath, the expansion sheath can be arranged in the puncture sheath in a penetrating mode and has an expansion effect, and a hemostatic valve is arranged at the tail end of the puncture sheath.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611099457.8A CN106510807B (en) | 2016-12-02 | 2016-12-02 | Pericardial puncture needle assembly and pericardial puncture kit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611099457.8A CN106510807B (en) | 2016-12-02 | 2016-12-02 | Pericardial puncture needle assembly and pericardial puncture kit |
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| CN106510807A CN106510807A (en) | 2017-03-22 |
| CN106510807B true CN106510807B (en) | 2023-07-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202376193U (en) * | 2011-12-13 | 2012-08-15 | 重庆市南川区人民医院 | Novel pericardium puncture needle |
| CN205072982U (en) * | 2015-10-28 | 2016-03-09 | 冷钦 | Novel intracardiac branch of academic or vocational study puncture drainage device |
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| WO2007142098A1 (en) * | 2006-06-02 | 2007-12-13 | Asahi Polyslider Company, Limited | Puncture needle and lancet having it |
| DE102007010304B4 (en) * | 2007-02-22 | 2010-04-22 | Aesculap Ag | Surgical instruments |
| WO2009107792A1 (en) * | 2008-02-29 | 2009-09-03 | 国立大学法人東京大学 | Device having rigidity which can be changed between high and low levels |
| CN201551375U (en) * | 2009-12-14 | 2010-08-18 | 葛璐璐 | Novel pericardium puncture needle |
| EP2558151A4 (en) * | 2010-04-13 | 2018-01-10 | Sentreheart, Inc. | Methods and devices for pericardial access |
| CN102500036B (en) * | 2011-11-17 | 2013-06-05 | 天津科技大学 | Magnetic-navigation joint type puncture needle |
| US9791582B2 (en) * | 2014-12-05 | 2017-10-17 | Gx Technology Canada Ltd. | Segmented-foil divertor |
| CN204484260U (en) * | 2015-03-20 | 2015-07-22 | 丽水市中心医院 | A kind of puncturing kit |
| CN204501727U (en) * | 2015-03-24 | 2015-07-29 | 中国人民解放军第四军医大学 | A kind of vomitus taker |
| CN206621405U (en) * | 2016-12-02 | 2017-11-10 | 林立 | A kind of paracentesis pericardii needle assemblies and paracentesis pericardii set group |
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2016
- 2016-12-02 CN CN201611099457.8A patent/CN106510807B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202376193U (en) * | 2011-12-13 | 2012-08-15 | 重庆市南川区人民医院 | Novel pericardium puncture needle |
| CN205072982U (en) * | 2015-10-28 | 2016-03-09 | 冷钦 | Novel intracardiac branch of academic or vocational study puncture drainage device |
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