CN113499175A - Balloon dilatation catheter propeller - Google Patents

Balloon dilatation catheter propeller Download PDF

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Publication number
CN113499175A
CN113499175A CN202110780692.6A CN202110780692A CN113499175A CN 113499175 A CN113499175 A CN 113499175A CN 202110780692 A CN202110780692 A CN 202110780692A CN 113499175 A CN113499175 A CN 113499175A
Authority
CN
China
Prior art keywords
sleeve
cap
left end
guide tube
push rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110780692.6A
Other languages
Chinese (zh)
Inventor
陶忠
史庆
吴越
林龑
王昊飞
王海军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baiwei Wuhan Medical Technology Co ltd
Original Assignee
Baiwei Wuhan Medical Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baiwei Wuhan Medical Technology Co ltd filed Critical Baiwei Wuhan Medical Technology Co ltd
Priority to CN202110780692.6A priority Critical patent/CN113499175A/en
Publication of CN113499175A publication Critical patent/CN113499175A/en
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/10—Balloon catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M29/00—Dilators with or without means for introducing media, e.g. remedies
    • A61M29/02—Dilators made of swellable material
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2210/00—Anatomical parts of the body
    • A61M2210/06—Head
    • A61M2210/0662—Ears
    • A61M2210/0675—Eustachian tube

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Anesthesiology (AREA)
  • Vascular Medicine (AREA)
  • Hematology (AREA)
  • Cardiology (AREA)
  • Transplantation (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Child & Adolescent Psychology (AREA)
  • Biophysics (AREA)
  • Pulmonology (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

The invention discloses a balloon dilatation catheter propeller which comprises a guide tube, a sleeve, a limiting tube, a push rod, an end cap and a tail cap, wherein the guide tube is fixedly connected with the sleeve; a counter bore is formed in the left end of the sleeve; the left end of the limiting pipe is provided with a flange, and the diameter of the flange is matched with the inner diameter of the counter bore; the right end of the guide tube is provided with a cylindrical fixing part thicker than the guide tube main body, and the outer diameter of the cylindrical fixing part is matched with the inner diameter of a counter bore at the left end of the sleeve; the limiting pipe is arranged in the sleeve, a flange at the left end of the limiting pipe abuts against the bottom of a counter bore at the left end of the sleeve, and the right end of the limiting pipe is inserted into an inner hole of the push rod; the cap tops of the end cap and the tail cap are provided with through holes; the end cap is sleeved outside the guide tube main body and presses the cylindrical fixing part of the guide tube into the counter bore of the sleeve and abuts against the flange of the limiting tube; the push rod penetrates through a through hole in the tail cap and can slide in the sleeve. The propeller can limit the deformation of the balloon dilatation catheter in the sleeve and prevent the balloon dilatation catheter from being damaged.

Description

Balloon dilatation catheter propeller
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a balloon dilatation catheter propeller.
Background
The eustachian tube, as an independent organ, is an anatomical passageway that communicates the nasal cavity, pharyngeal cavity and middle ear cavity, and has two openings, one opening leading to the tympanum of the middle ear, and the other opening into the nasopharynx. The eustachian tube plays important roles in the human body, such as balancing the middle ear cavity and the external air pressure, draining secretions or dropsy in the middle ear cavity, preventing retrograde infection, blocking sound or silencing and the like. If the eustachian tube cannot be opened, a balloon dilatation catheter is generally stretched into the eustachian tube and is propped open by the balloon. Need to deliver to the assigned position with the propeller with sacculus expansion pipe, current sacculus expansion pipe propeller passes through the tapering hole and the push rod connection of push rod bottom, and the sleeve pipe internal diameter is greater than sacculus expansion pipe's external diameter, and if impel not smoothly, sacculus expansion pipe can be bent in the sleeve pipe, can't continue to impel, if continue to impel the push rod by force and can extrude sacculus expansion pipe, leads to sacculus expansion pipe to damage.
Disclosure of Invention
The invention aims to provide a balloon dilatation catheter propeller. The device can limit the deformation of the balloon dilatation catheter in the sleeve and prevent the balloon dilatation catheter from being damaged.
In order to solve the technical problems, the invention adopts the following technical scheme:
a balloon dilatation catheter propeller comprises a guide tube, a sleeve, a limiting tube, a push rod, an end cap and a tail cap;
a counter bore is formed in the left end of the sleeve;
the left end of the limiting pipe is provided with a flange, and the diameter of the flange is matched with the inner diameter of the counter bore;
the right end of the guide tube is provided with a cylindrical fixing part thicker than the guide tube main body, and the outer diameter of the cylindrical fixing part is matched with the inner diameter of a counter bore at the left end of the sleeve;
the limiting pipe is arranged in the sleeve, a flange at the left end of the limiting pipe abuts against the bottom of a counter bore at the left end of the sleeve, and the right end of the limiting pipe is inserted into an inner hole of the push rod;
the cap tops of the end cap and the tail cap are provided with through holes;
the end cap is sleeved outside the guide tube main body and presses the cylindrical fixing part of the guide tube into the counter bore of the sleeve and abuts against the flange of the limiting tube;
the end cap is fixedly connected with the left end of the sleeve, and the tail cap is fixedly connected with the right end of the sleeve;
the push rod penetrates through a through hole in the tail cap and can slide in the sleeve.
As an implementation mode, a fixed sleeve is sleeved on the outer side of the limiting pipe, and the outer diameter of the fixed sleeve is matched with the inner diameter of the sleeve; fixed cover and spacing pipe are connected through the radials along fixed cover radial arrangement, be equipped with on the push rod and dodge the groove with the radials correspondence, the radials clamp is dodging between the groove.
As a preferred embodiment, 3-5 radial plates are uniformly arranged on the circumference of the limiting pipe and connected with the fixing sleeve.
As an implementation mode, the limiting pipe, the radial plate and the fixing sleeve are of an integrated structure.
In one embodiment, a screw hole is formed in the side wall of the bottom of the sleeve close to the tail cap end, and a fixing screw is arranged in the screw hole.
In one embodiment, the end cap is connected with the left end of the sleeve through threads; the tail cap is connected with the right end of the sleeve through threads.
Any range recited herein is intended to include the endpoints and any number between the endpoints and any subrange subsumed therein or defined therein.
The starting materials of the present invention are commercially available, unless otherwise specified, and the equipment used in the present invention may be any equipment conventionally used in the art or may be any equipment known in the art.
Compared with the prior art, the invention has the following beneficial effects:
the invention limits the deformation of the balloon dilatation catheter in the sleeve by adding the limiting tube and prevents the balloon dilatation catheter from being damaged.
Drawings
The following detailed description of embodiments of the invention is provided in connection with the accompanying drawings
FIG. 1 is a schematic structural view of a balloon dilatation catheter pusher of the present invention;
FIG. 2 is a schematic view of the overall structure of the limiting tube, the spoke plate and the fixing sleeve;
FIG. 3 is a right side elevation view in section of FIG. 2;
FIG. 4 is a schematic view of a push rod structure;
FIG. 5 is a schematic cross-sectional view of the push rod;
FIG. 6 is an enlarged cross-sectional view taken along line A-A of FIG. 1;
FIG. 7 is an enlarged cross-sectional view taken along line B-B of FIG. 1;
fig. 8 is a schematic structural view of the sleeve.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below in connection with preferred embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1, 6 and 7, as one aspect of the present invention, a balloon expandable catheter pusher comprises:
a guide tube 1 for guiding the balloon dilatation catheter from the cannula 2 to a designated position of the eustachian tube;
a sleeve 2 for the passage of a balloon dilatation catheter and a push rod 4;
the limiting tube 3 is used for limiting the deformation of the balloon dilatation catheter in the sleeve 2 and preventing the balloon dilatation catheter from being damaged;
the push rod 4 is used for pushing the balloon dilatation catheter to be delivered to the designated position of the eustachian tube from the sleeve 2;
the end cap 5 is used for fixing the guide tube 1, the sleeve 2 and the limiting tube 3;
a tail cap 6 for fixing the sleeve 2 and passing through the push rod 4;
a counter bore 21 is formed in the left end of the sleeve 2, and is shown in fig. 8;
the left end of the limiting pipe 3 is provided with a flange 31, and the diameter of the flange 31 is matched with the inner diameter of the counter bore 21;
the right end of the guide tube 1 is provided with a cylindrical fixing part 11 which is thicker than the main body of the guide tube, and the outer diameter of the cylindrical fixing part 11 is matched with the inner diameter of a counter bore 21 at the left end of the sleeve 2;
the limiting pipe 3 is arranged in the sleeve 2, the flange 31 at the left end of the limiting pipe 3 abuts against the bottom of the counter bore 21 at the left end of the sleeve 2, and the right end of the limiting pipe 3 is inserted into the inner hole of the push rod 4; the arrangement of the counter bore 21 is very convenient for positioning and mounting the guide tube 1; meanwhile, the limiting pipe 3 is pressed at the bottom of the counter bore 21 only by the flange 31, an additional fixing structure is not needed, and the limiting pipe is relatively convenient to take out; the inner diameter of the limiting tube 3 is corresponding to the balloon dilatation catheter needing to be conveyed;
the top of the end cap 5 is provided with a through hole 51, and the top of the tail cap 6 is provided with a through hole 61;
the end cap 5 is sleeved outside the main body of the guide tube 1, presses the cylindrical fixing part 11 of the guide tube 1 in the counter bore 21 of the sleeve 2 and is abutted against the flange 31 of the limiting tube 3;
the end cap 5 is fixedly connected with the left end of the sleeve 2, and the tail cap 6 is fixedly connected with the right end of the sleeve 2;
the push rod 4 can slide in the sleeve 2 through a through hole 61 on the tail cap 6.
According to the invention, through the arrangement of the limiting tube, the balloon dilatation catheter is always positioned in the inner hole of the push rod 4 and the limiting tube 3 which are close to the diameter of the balloon dilatation catheter, and no large distortion occurs. Therefore, when the propeller of the invention is manufactured, the size of the inner diameter of the limiting tube is slightly larger than the outer diameter of the balloon dilatation catheter.
In one embodiment, as shown in fig. 2, 3, 4 and 5, the outside of the limiting tube 3 is sleeved with a fixing sleeve 32, and the outer diameter of the fixing sleeve 32 is matched with the inner diameter of the sleeve 2; fixed cover 32 and spacing pipe 3 are connected through radials 33 along fixed cover radial arrangement, be equipped with on the push rod 4 and dodge groove 41 with radials 33 correspondence, radials 33 clamp is dodging between groove 41. It can be understood that the diameter of the inner hole of the push rod 4 in the invention is not much larger than that of the balloon dilatation catheter, the wall thickness of the limiting tube 3 is required to be smaller to accommodate the limiting tube 3, and the fixing sleeve 32 is additionally arranged to fix the limiting tube 3 because the wall thickness is small and the limiting tube is easy to deform. The web 33 and the escape groove 41 allow for a smooth relative movement of the stopper tube 3 and the pusher 4.
In a preferred embodiment, 4 radial plates 33 are uniformly arranged on the circumference of the limiting tube 3 and connected with the fixing sleeve 32.
In one embodiment, the limiting tube 3, the spoke plate 33 and the fixing sleeve 33 are of an integrated structure, the integrated structure is more compact, and the fixing sleeve is convenient to detach when needing to be replaced.
In one embodiment, as shown in fig. 1, the side wall of the bottom of the sleeve 2 near the tail cap end is provided with a screw hole, and a fixing screw 7 is arranged in the screw hole.
In one embodiment, the end cap 5 is connected with the left end of the sleeve 2 through threads; the tail cap 6 is connected with the right end of the sleeve 2 through threads.
The working principle of the invention is as follows:
the end cap 5 is fitted over the guide tube 1 and slid onto the fixing portion 11. The stop tube is inserted into the sleeve 2 and the flange 31 is brought to the bottom of the counterbore 21. The cylindrical fixing portion 11 is then placed in the counterbore 21 and the end cap 5 is screwed on, whereupon the flange 31 is pressed against the bottom of the counterbore 21 by the cylindrical fixing portion 11. The push rod 4 is inserted into the sleeve 2 from the other end of the connecting guide pipe 1, the avoiding groove 41 is aligned with the web plate 33, and the web plate 33 extends into the avoiding groove 41. Then the tail cap is sleeved outside the push rod 4, and the sleeve 2 is inserted into one end of the push rod 4 to obtain the balloon dilatation catheter propeller;
the balloon dilatation catheter is inserted from the end of the push rod 4 which is not inserted into the sleeve 2, and passes through the limiting tube 3 and the guide tube 1. The sacculus expansion pipe is through pushing into the taper hole that push rod 4 did not insert sleeve pipe 2 one end with the tapering structure of self among the prior art, pushes away tightly both with great power, and the sacculus expansion pipe can be connected tightly with push rod 4 through warping through the tapering structure with self softer. The push rod 4 is continuously pushed in the sleeve 2, so that the top end of the balloon dilatation catheter can be pushed out of the guide catheter 1 to reach the focus. If the advance of the balloon dilatation catheter is blocked, the balloon dilatation catheter cannot generate large bending in the push rod 4 and the limiting tube because the inner diameter of the push rod 4 and the outer diameter of the limiting tube are close to the outer diameter of the balloon dilatation catheter, and cannot be damaged. The push rod 4 is continuously forced to be pushed, the balloon dilatation catheter is stressed greatly, and the taper structure of the balloon dilatation catheter is disconnected from the push rod 4 so as to avoid injuring the patient.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Not all embodiments are exhaustive. All obvious changes and modifications which are obvious to the technical scheme of the invention are covered by the protection scope of the invention.

Claims (6)

1. A balloon dilatation catheter pusher characterized in that: comprises a guide tube, a sleeve, a limit tube, a push rod, an end cap and a tail cap;
a counter bore is formed in the left end of the sleeve;
the left end of the limiting pipe is provided with a flange, and the diameter of the flange is matched with the inner diameter of the counter bore;
the right end of the guide tube is provided with a cylindrical fixing part thicker than the guide tube main body, and the outer diameter of the cylindrical fixing part is matched with the inner diameter of a counter bore at the left end of the sleeve;
the limiting pipe is arranged in the sleeve, a flange at the left end of the limiting pipe abuts against the bottom of a counter bore at the left end of the sleeve, and the right end of the limiting pipe is inserted into an inner hole of the push rod;
the cap tops of the end cap and the tail cap are provided with through holes;
the end cap is sleeved outside the guide tube main body and presses the cylindrical fixing part of the guide tube into the counter bore of the sleeve and abuts against the flange of the limiting tube;
the end cap is fixedly connected with the left end of the sleeve, and the tail cap is fixedly connected with the right end of the sleeve;
the push rod penetrates through a through hole in the tail cap and can slide in the sleeve.
2. The balloon dilation catheter pusher of claim 1, wherein: the outer side of the limiting pipe is sleeved with a fixed sleeve, and the outer diameter of the fixed sleeve is matched with the inner diameter of the sleeve; fixed cover and spacing pipe are connected through the radials along fixed cover radial arrangement, be equipped with on the push rod and dodge the groove with the radials correspondence, the radials clamp is dodging between the groove.
3. The balloon dilation catheter pusher of claim 2, wherein: 3-5 radial plates are uniformly arranged on the circumference of the limiting pipe and connected with the fixed sleeve.
4. The balloon dilation catheter pusher of claim 2, wherein: the limiting pipe, the radial plate and the fixing sleeve are of an integrated structure.
5. The balloon dilation catheter pusher of claim 1, wherein: and a screw hole is formed in the side wall of the bottom of the sleeve close to the tail cap end, and a fixing screw is arranged in the screw hole.
6. The balloon dilation catheter pusher of claim 1, wherein: the end cap is connected with the left end of the sleeve through threads; the tail cap is connected with the right end of the sleeve through threads.
CN202110780692.6A 2021-07-09 2021-07-09 Balloon dilatation catheter propeller Pending CN113499175A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110780692.6A CN113499175A (en) 2021-07-09 2021-07-09 Balloon dilatation catheter propeller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110780692.6A CN113499175A (en) 2021-07-09 2021-07-09 Balloon dilatation catheter propeller

Publications (1)

Publication Number Publication Date
CN113499175A true CN113499175A (en) 2021-10-15

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CN202110780692.6A Pending CN113499175A (en) 2021-07-09 2021-07-09 Balloon dilatation catheter propeller

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Country Link
CN (1) CN113499175A (en)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4616652A (en) * 1983-10-19 1986-10-14 Advanced Cardiovascular Systems, Inc. Dilatation catheter positioning apparatus
US4820349A (en) * 1987-08-21 1989-04-11 C. R. Bard, Inc. Dilatation catheter with collapsible outer diameter
JPH0615005A (en) * 1990-06-18 1994-01-25 C R Bard Inc Balloon expansion catheter
CA2218406A1 (en) * 1996-11-15 1998-05-15 Schneider (Europe) Ag Balloon catheter and delivery device for a stent
WO2010141894A1 (en) * 2009-06-05 2010-12-09 Entellus Medical, Inc. Frontal sinus dilation catheter
CN101934113A (en) * 2009-06-29 2011-01-05 微创医疗器械(上海)有限公司 Balloon transport system
CN101999925A (en) * 2010-11-26 2011-04-06 上海凯利泰医疗科技股份有限公司 Expansion structure of self-limiting high-pressure expansion saccule
CN106075702A (en) * 2016-05-23 2016-11-09 佛山市第人民医院 Medical per os Eustachian tube sacculus dilating catheter is special inserts apparatus
CN107007922A (en) * 2017-03-28 2017-08-04 广州启骏生物科技有限公司 A kind of nasal sinus balloon expandable and therapeutic system
CN107242936A (en) * 2017-07-13 2017-10-13 柏为（武汉）医疗科技股份有限公司 A kind of drug loaded device for treating salpingostenochoria
CN211024709U (en) * 2019-03-08 2020-07-17 苏州莱诺医疗器械有限公司 Medical transnasal eustachian tube balloon dilatation catheter special-purpose implanting instrument
CN215875106U (en) * 2021-07-09 2022-02-22 柏为（武汉）医疗科技股份有限公司 Balloon dilatation catheter propeller

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4616652A (en) * 1983-10-19 1986-10-14 Advanced Cardiovascular Systems, Inc. Dilatation catheter positioning apparatus
US4820349A (en) * 1987-08-21 1989-04-11 C. R. Bard, Inc. Dilatation catheter with collapsible outer diameter
JPH0615005A (en) * 1990-06-18 1994-01-25 C R Bard Inc Balloon expansion catheter
CA2218406A1 (en) * 1996-11-15 1998-05-15 Schneider (Europe) Ag Balloon catheter and delivery device for a stent
US6066155A (en) * 1996-11-15 2000-05-23 Schneider (Europe) A.G. Captured sleeve and stent delivery device
WO2010141894A1 (en) * 2009-06-05 2010-12-09 Entellus Medical, Inc. Frontal sinus dilation catheter
CN101934113A (en) * 2009-06-29 2011-01-05 微创医疗器械(上海)有限公司 Balloon transport system
CN101999925A (en) * 2010-11-26 2011-04-06 上海凯利泰医疗科技股份有限公司 Expansion structure of self-limiting high-pressure expansion saccule
CN106075702A (en) * 2016-05-23 2016-11-09 佛山市第人民医院 Medical per os Eustachian tube sacculus dilating catheter is special inserts apparatus
CN107007922A (en) * 2017-03-28 2017-08-04 广州启骏生物科技有限公司 A kind of nasal sinus balloon expandable and therapeutic system
CN107242936A (en) * 2017-07-13 2017-10-13 柏为（武汉）医疗科技股份有限公司 A kind of drug loaded device for treating salpingostenochoria
CN211024709U (en) * 2019-03-08 2020-07-17 苏州莱诺医疗器械有限公司 Medical transnasal eustachian tube balloon dilatation catheter special-purpose implanting instrument
CN215875106U (en) * 2021-07-09 2022-02-22 柏为（武汉）医疗科技股份有限公司 Balloon dilatation catheter propeller

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