WO2020235953A1 - Structure de tube endotrachéal et méthode de mesure de pression de structure de tube endotrachéal - Google Patents

Structure de tube endotrachéal et méthode de mesure de pression de structure de tube endotrachéal Download PDF

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Publication number
WO2020235953A1
WO2020235953A1 PCT/KR2020/006674 KR2020006674W WO2020235953A1 WO 2020235953 A1 WO2020235953 A1 WO 2020235953A1 KR 2020006674 W KR2020006674 W KR 2020006674W WO 2020235953 A1 WO2020235953 A1 WO 2020235953A1
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WO
WIPO (PCT)
Prior art keywords
layer
balloon
pilot
tube structure
pilot balloon
Prior art date
Application number
PCT/KR2020/006674
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English (en)
Korean (ko)
Inventor
이수원
구본욱
Original Assignee
서울대학교병원
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Filing date
Publication date
Application filed by 서울대학교병원 filed Critical 서울대학교병원
Publication of WO2020235953A1 publication Critical patent/WO2020235953A1/fr

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    • 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
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/04—Tracheal tubes
    • A61M16/0434—Cuffs
    • A61M16/044—External cuff pressure control or supply, e.g. synchronisation with respiration
    • 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
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • 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
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/04—Tracheal tubes
    • 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
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/04—Tracheal tubes
    • A61M16/0402—Special features for tracheal tubes not otherwise provided for
    • A61M16/0409—Special features for tracheal tubes not otherwise provided for with mean for closing the oesophagus
    • 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
    • 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
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/0027—Accessories therefor, e.g. sensors, vibrators, negative pressure pressure meter
    • 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
    • A61M2025/0008—Catheters; Hollow probes having visible markings on its surface, i.e. visible to the naked eye, for any purpose, e.g. insertion depth markers, rotational markers or identification of type
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3331—Pressure; Flow
    • A61M2205/3344—Measuring or controlling pressure at the body treatment site
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/58—Means for facilitating use, e.g. by people with impaired vision
    • A61M2205/583—Means for facilitating use, e.g. by people with impaired vision by visual feedback
    • A61M2205/584—Means for facilitating use, e.g. by people with impaired vision by visual feedback having a color code

Definitions

  • the present invention relates to an endotracheal tube structure and a method of measuring pressure of an endotracheal tube structure, and more particularly, an intratracheal tube structure capable of measuring the pressure of the main balloon inserted into the trachea by measuring the inflation amount of the pilot balloon, and It relates to a method for measuring the pressure of the tube structure in the trachea.
  • E-tube endotracheal tube
  • a tool capable of closing the space between the trachea and the endotracheal tube is required.
  • a balloon is placed outside the E-tube and inflated and used for this.
  • the currently used endotracheal tube 1000 is used by inserting the air bag 1001 into the patient's organ, and inflating the pilot air bag 1002 from the outside. have.
  • the air sac 1001 must be inflated above a sufficient pressure in order for the pressure of the air injected from the outside to be well transmitted to the lung tissue, and this pressure is directly transmitted to the tracheal mucosa and can cause damage to the mucous membrane. (1002) is monitoring pressure from the outside.
  • pilot airbag 1002 is a situation in which the pressure is directly felt by pressing it by hand, or a pressure gauge (not shown) is connected to quantitatively measure it.
  • the method of directly feeling the pressure by pressing the pilot airbag 1002 by hand has a problem in that the measured amount may not be accurate according to the proficiency of the measurer when an excessive pressure is applied to the airbag 1001.
  • the pressure of the pilot air sac 1002 is not limited, but the higher the pressure is, the more it is recommended to apply the minimum pressure necessary because it causes damage to the mucous membrane cells in the trachea, and the mechanically applied air pressure is usually 30 cm. Since it does not exceed H 2 O, most of it is used so as not to apply more than 30 cm H 2 O pressure.
  • a method of measuring the amount of expansion of the pilot air bag 1002 through a separate pressure gauge requires moving the patient to a treatment room with a pressure gauge of a relatively large facility, or connecting and disconnecting the pressure gauge for each measurement. Because of the hassle, it is rarely used.
  • the color is changed or the pattern is displayed, so that the time when the limit pressure is exceeded can be accurately identified. It is intended to provide a tube structure and a method of measuring the pressure of the tube structure in an organ.
  • exemplary embodiments of the present invention by quantitatively measuring the inflation amount of the pilot balloon, it is intended to provide an endotracheal tube structure and a method for measuring pressure of an intratracheal tube structure capable of determining the pressure of the pilot balloon in real time.
  • the insertion conduit inserted into the trachea; An inflatable main balloon surrounding the insertion conduit; A pilot balloon having the same elasticity as the main balloon;
  • an intra-engine tube structure including a tube pipe airtightly connected between the main balloon and the pilot balloon through which air flows for inflating the main balloon, wherein the inflation amount of the main balloon and the pilot balloon are proportional to each other, and the pilot balloon
  • an endotracheal tube structure including a first layer positioned inside the pilot balloon, and a second layer surrounding the outer surface of the first layer and expanding with the expansion of the first layer.
  • the pressure of the main balloon may be measured based on a difference between the degree of expansion of the first layer and the degree of expansion of the second layer.
  • the distal end of the insertion conduit of the present invention is inserted into the patient's trachea together with the main balloon, and at the distal end of the insertion conduit, air is injected into the trachea of the patient through an opening formed at the distal end of the insertion conduit.
  • a connector to which a device for connecting is connected may be formed.
  • the first layer and the second layer of the present invention are opaque resin or transparent resin, and the color of the first layer and the color of the second layer may be different from each other.
  • the brightness of the color of the first layer of the present invention may be different from that of the color of the second layer.
  • the dye density of the first layer of the present invention may be formed larger than that of the second layer.
  • a scale is displayed on the outer circumferential surface of the pilot balloon of the present invention, further comprising a gauge disposed around the pilot balloon to surround the pilot balloon, and the gauge may elastically deform according to the expansion of the pilot balloon.
  • the tube structure in an organ may include a main balloon; A pilot balloon having the same elasticity as the main balloon; And a tube tube airtightly connected and connected between the main balloon and the pilot balloon, wherein the inflation amount of the main balloon and the pilot balloon is proportional to each other, and the pilot balloon is a first layer located inside the pilot balloon And, a second layer surrounding the outer surface of the first layer and expanding with the expansion of the first layer, and the pressure of the main balloon is measured based on the difference between the degree of expansion of the first layer and the degree of expansion of the second layer. It provides a method of measuring the pressure of the tube structure in the trachea.
  • exemplary embodiments of the present invention it is possible to quickly and easily monitor the pressure change of the main balloon inserted into the organ of the patient in real time, and further, quantitative measurement may be possible.
  • a separate complex device such as a pressure gauge or relying on the individual skill level of the measurer, and damage to the endotracheal mucosa cells by the endotracheal tube can be prevented.
  • FIG. 1 is a conceptual diagram schematically showing an endotracheal tube structure in an embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view of a pilot balloon according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram schematically showing that when the first layer of the pilot balloon expands according to an embodiment of the present invention, the second layer expands together with it.
  • 4A is a diagram illustrating a pattern of a first layer and a second layer having different patterns according to an embodiment of the present invention.
  • 4B is a schematic diagram schematically showing that the pattern of the first layer is displayed as the pilot balloon expands in the embodiment according to FIG. 4A.
  • 5A is a diagram illustrating different brightnesses of a first layer and a second layer according to an embodiment of the present invention.
  • 5B is a schematic diagram schematically showing that the color of the first layer is displayed as the pilot balloon expands in the embodiment according to FIG. 5A.
  • 6A is a schematic diagram schematically showing that a gauge is mounted outside the pilot balloon according to an embodiment of the present invention.
  • 6B is a schematic diagram schematically showing that the gauge is deformed as the pilot balloon expands and the pressure of the pilot balloon is displayed through a scale in the embodiment according to FIG. 6A.
  • FIG. 7 schematically shows an endotracheal tube structure according to a conventional patent document.
  • catheter pressure measuring device 100 pilot balloon
  • tip portion 401a opening
  • FIG. 1 is a conceptual diagram schematically showing an endotracheal tube structure 1 in an embodiment of the present invention.
  • the endotracheal tube structure 1 includes an insertion conduit 400, a main balloon 200, a pilot balloon 100, and a main balloon 200 and a pilot balloon. It consists of a tube tube 300 connecting 100 to each other.
  • the insertion conduit 400 is long and hollow, and air can flow.
  • the front end 401 of the insertion conduit 400 is inserted into the patient's organ together with the main balloon 200, and at the distal end, a connector 402 to which a device for injecting air into the patient's organ, such as a ventilator, is connected. Is formed.
  • air injected into the insertion conduit 400 through a ventilator connected to the connector 402 may be injected into the patient's organ through the opening 401a of the insertion conduit 400.
  • the insertion conduit 400 is coupled with a main balloon 200 that is expandable while surrounding it, and the main balloon 200 is airtightly connected to the pilot balloon 100 through a tube tube 300, and the air is The main balloon 200 may be expanded by flowing inside the tube tube 300.
  • the pilot balloon 100 is configured to have the same elasticity as the main balloon 200, the inflation state of the main balloon 200 is connected so that the inflation state of the pilot balloon 100 is substantially proportional.
  • the expression “substantial” means that there may be other parts in the formal part of the present invention (for example, differences in numerical ranges), but the desired effect of the present invention can be obtained.
  • the pilot balloon 100 also starts inflating at a pressure that starts inflating in a non-inflating state, and when the main balloon 200 is inflating abnormally large, the pilot balloon 100 It is also greatly inflated, meaning that the inflation state of the pilot balloon 100 visually reflects the inflation state of the main balloon 200.
  • FIG. 2 is a schematic cross-sectional view of a pilot balloon 100 according to an embodiment of the present invention.
  • the pilot balloon 100 includes a first layer 110 located inside the pilot balloon 100 and a second layer 120 surrounding the outer surface of the first layer 110. ).
  • the pilot balloon 100 may be assembled by airtightly coupling the tubular hollow shaft 101 having a plurality of holes 102 and the first layer 110.
  • the size of the hole 102 is not particularly limited, but is preferably about the same as the inner diameter of the tube tube 300.
  • the bonding between the first layer 110 and the hollow shaft 101 may be performed by melt bonding through various heating devices using a solvent or an adhesive solution.
  • FIG 3 is a schematic diagram schematically showing that when the first layer 110 of the pilot balloon 100 is inflated according to an embodiment of the present invention, the second layer 120 is expanded together with it.
  • the second layer 120 expands together with it.
  • air is delivered to the pilot balloon 100 through the tube tube 300 and expanded together.
  • the inflation pressure of the main balloon 200 inside the engine needs to be set not to exceed 30cm H 2 O as described above, and the pressure exceeding this can be identified through inflation of the pilot balloon 100.
  • FIG. 4A shows that the patterns of the first layer 110 and the second layer 120 are different according to an embodiment of the present invention
  • FIG. 4B shows that in the embodiment according to FIG. 4A, as the pilot balloon expands.
  • It is a schematic diagram schematically showing that the pattern 111 of the first layer passes through the pattern 121 of the second layer and is displayed to be distinguished by the naked eye.
  • the pattern 111 of the first layer is set as a checkered pattern
  • the pattern 121 of the second layer is set as a plain pattern
  • the pilot balloon 100 is In the case of expansion, as the second layer 120 expands, the pattern 111 of the inner first layer can be visually identified by passing through it.
  • the pattern 111a of the first layer which is visually identified, has passed through the second layer 120, it can be identified as having a lower density than the pattern 111 formed on the first layer.
  • FIG. 5A shows that the brightness of the first layer 110 and the second layer 120 are different according to an embodiment of the present invention
  • FIG. 5B is a pilot balloon 100 in the embodiment according to FIG. 5A. It is a schematic diagram schematically showing that the color of the first layer 110 is displayed as it expands.
  • the pattern 112 of the first layer is set to a pattern having low brightness, that is, a dark pattern
  • the pattern 122 of the second layer is When the pattern of the first layer is set to have a higher brightness, that is, a bright pattern, and when the pilot balloon 100 expands, the second layer 120 penetrates as it expands, so that the pattern 112 of the first layer inside. ) Can be visually identified.
  • the pattern 112a of the first layer identified by the naked eye has passed through the second layer 120, it can be identified as having a higher density than the pattern 112 formed on the first layer.
  • the pattern of the first layer 110 transmitted therethrough should be identified, so that the first layer 110 and the second layer 120 are made of opaque or transparent resin. It is desirable.
  • the dye density of the pattern of the first layer 110 is set to be large and the dye density of the second layer 120 is set to be low
  • the second layer 120 Since the amount of expansion of the first layer 110 is larger than the amount of expansion of the first layer 110, the pigment of the second layer 120 becomes lighter than that of the first layer 110, and the color of the first layer 110 is visually changed. Become identifiable.
  • the present invention it is possible to set and identify different colors of the patterns of the first layer 110 and the second layer 120. Specifically, even when the colors of the first layer 110 and the second layer 120 are set differently, similarly, when the pilot balloon 100 is inflated, the amount of expansion of the second layer 120 is the first layer ( Since it is larger than the expansion amount of 110), the color of the second layer 120 becomes lighter, and the color of the first layer 110 can be visually identified.
  • FIG. 6A is a schematic diagram schematically showing that a gauge 130 is mounted on the outside of the pilot balloon 110 according to an embodiment of the present invention
  • FIG. 6B is a schematic diagram showing that in an embodiment according to FIG. 6A, the pilot balloon 110 is It is a schematic diagram schematically showing that the gauge 130 is elastically deformed as it expands and the pressure of the pilot balloon 100 is displayed through the scale 131.
  • a scale 131 may be displayed on the outer peripheral surface of the pilot balloon 100.
  • a C-shaped gauge 130 is disposed around the pilot balloon 100 and surrounds the pilot balloon 100, so that the gauge 130 elastically deforms according to the expansion of the pilot balloon 100
  • the distal end may be located on the scale 131.
  • the pilot balloon ( The amount of change in pressure corresponding to the circumference of 100) may be displayed on the scale 131.
  • the inflation state of the main balloon 200 can be quantitatively determined through the scale 131 and the gauge 130 displayed on the pilot balloon 100.
  • the intratracheal tube structure and the intratracheal tube structure pressure measurement method of the present invention it is possible to quickly and easily monitor the pressure change of the main balloon inserted into the organ of the patient in real time, and further, quantitative measurement may be possible. By using this, it is possible to avoid using a separate complex device such as a pressure gauge or relying on the individual skill level of the measurer, and damage to the endotracheal mucosa cells by the endotracheal tube can be prevented.

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

Abstract

L'invention concerne une structure de tube endotrachéal et une méthode de mesure de pression de la structure de tube endotrachéal correspondante, la structure de tube endotrachéal comprenant : un conduit d'insertion inséré dans une trachée ; un ballonnet principal gonflable entourant le conduit d'insertion ; un ballonnet témoin ayant la même élasticité que le ballonnet principal ; et un tube relié de façon étanche à l'air entre le ballonnet principal et le ballonnet témoin, et à travers lequel l'air pour gonfler le ballonnet principal s'écoule, la quantité de gonflage du ballonnet principal et celle du ballonnet témoin étant proportionnelles l'une à l'autre, et le ballonnet témoin comprenant : une première couche positionnée à l'intérieur du ballonnet témoin ; et une seconde couche entourant une surface extérieure de la première couche et se dilatant en même temps que la première couche.
PCT/KR2020/006674 2019-05-22 2020-05-22 Structure de tube endotrachéal et méthode de mesure de pression de structure de tube endotrachéal WO2020235953A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020190060116A KR102364785B1 (ko) 2019-05-22 2019-05-22 기관 내 튜브 구조체 및 기관 내 튜브 구조체 압력 측정 방법
KR10-2019-0060116 2019-05-22

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WO (1) WO2020235953A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113198088A (zh) * 2021-05-06 2021-08-03 哈尔滨医科大学 一种导管结构及导丝引导装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102451958B1 (ko) * 2020-12-22 2022-10-11 재단법인 오송첨단의료산업진흥재단 풍선 카테터의 비접촉 압력측정 시스템 및 이를 이용한 풍선 카테터 비접촉 압력측정 방법

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Publication number Priority date Publication date Assignee Title
US5103817A (en) * 1990-07-20 1992-04-14 Xomed-Treace Inc. Automatic dye dispersant for endotracheal tubes and catheters
KR20010049586A (ko) * 1999-11-24 2001-06-15 윤종용 흡입마취용 식도내기관튜브
JP2003093511A (ja) * 2001-09-25 2003-04-02 Nippon Sherwood Medical Industries Ltd 気管切開チューブ
JP2010148545A (ja) * 2008-12-24 2010-07-08 Create Medic Co Ltd カフ内圧モニター装置
WO2012010997A2 (fr) * 2010-07-20 2012-01-26 Kimberly-Clark Worldwide, Inc. Indicateur de pression pour tubes endotrachéaux à ballonnet
WO2014145411A2 (fr) * 2013-03-15 2014-09-18 Seedlings Life Science Ventures, Llc. Système et ensemble de gonflage et de surveillance de pression à l'intérieur d'un ballonnet de retenue

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KR200191611Y1 (ko) * 2000-03-16 2000-08-16 김성오 기도내삽관튜브
US6732734B2 (en) 2001-04-27 2004-05-11 Kuraray Co., Ltd. Pilot balloon for balloon catheters
KR101755250B1 (ko) * 2015-10-27 2017-07-07 (주)인투케어 풍선 카테터 및 이를 포함하는 외과 시술 기기
KR20170027754A (ko) * 2017-02-27 2017-03-10 한명환 기관내 튜브

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5103817A (en) * 1990-07-20 1992-04-14 Xomed-Treace Inc. Automatic dye dispersant for endotracheal tubes and catheters
KR20010049586A (ko) * 1999-11-24 2001-06-15 윤종용 흡입마취용 식도내기관튜브
JP2003093511A (ja) * 2001-09-25 2003-04-02 Nippon Sherwood Medical Industries Ltd 気管切開チューブ
JP2010148545A (ja) * 2008-12-24 2010-07-08 Create Medic Co Ltd カフ内圧モニター装置
WO2012010997A2 (fr) * 2010-07-20 2012-01-26 Kimberly-Clark Worldwide, Inc. Indicateur de pression pour tubes endotrachéaux à ballonnet
WO2014145411A2 (fr) * 2013-03-15 2014-09-18 Seedlings Life Science Ventures, Llc. Système et ensemble de gonflage et de surveillance de pression à l'intérieur d'un ballonnet de retenue

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113198088A (zh) * 2021-05-06 2021-08-03 哈尔滨医科大学 一种导管结构及导丝引导装置

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