CN112316267A - Multifunctional visual single-cavity bronchial cannula - Google Patents

Multifunctional visual single-cavity bronchial cannula Download PDF

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Publication number
CN112316267A
CN112316267A CN202011302723.9A CN202011302723A CN112316267A CN 112316267 A CN112316267 A CN 112316267A CN 202011302723 A CN202011302723 A CN 202011302723A CN 112316267 A CN112316267 A CN 112316267A
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CN
China
Prior art keywords
main
branch
ventilation
tube
pipe
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Pending
Application number
CN202011302723.9A
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Chinese (zh)
Inventor
江伟
朱俊峰
汪代英
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Haopu Hangzhou Biotechnology Co ltd
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Haopu Hangzhou Biotechnology Co ltd
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Priority to CN202011302723.9A priority Critical patent/CN112316267A/en
Publication of CN112316267A publication Critical patent/CN112316267A/en
Pending legal-status Critical Current

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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
    • A61M16/0402—Special features for tracheal tubes not otherwise provided for
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/12—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with cooling or rinsing arrangements
    • A61B1/126—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with cooling or rinsing arrangements provided with means for cleaning in-use
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/267—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the respiratory tract, e.g. laryngoscopes, bronchoscopes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/267—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the respiratory tract, e.g. laryngoscopes, bronchoscopes
    • A61B1/2676—Bronchoscopes
    • A61M1/0023—
    • 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
    • A61M16/0463—Tracheal tubes combined with suction tubes, catheters or the like; Outside connections

Abstract

A multifunctional visual single-cavity bronchial cannula comprises a main ventilation tube assembly, a main tracheal cuff assembly, a bronchial cuff assembly, an intrabronchial balloon assembly, a visual data system assembly, a flushing cavity assembly and a suction cavity assembly. Compared with the prior art, the invention transmits the image signal to the universal display through the camera at the front end to display the video image in real time, and realizes the quick and accurate positioning of the single-cavity bronchial cannula, thereby accurately, quickly, safely and effectively completing the operation from the cannula to the bronchus, reducing the difficulty of the single-cavity bronchial cannula and the complexity of the operation, being simple, convenient and quick to operate and having little damage to human tissues; the overall outer diameter size of the vent pipe is reduced, the cannula injury and the cannula complication are reduced, and the safety and comfort are higher; meanwhile, the camera module adopts a split type image processor, so that the problems that the image processor has large heat productivity, easily burns internal tissues of a human body and the like are solved, and the safety is better.

Description

Multifunctional visual single-cavity bronchial cannula
Technical Field
The invention relates to a medical instrument for establishing an artificial airway for a patient, which is applied to surgical anesthesia or rescue of critical patients or other assisted respiration, in particular to a multifunctional visual single-cavity bronchial cannula.
Background
In the anesthesia operation, the single-cavity bronchial catheter and the single-cavity bronchial cannula are both used for separating the two lungs in the chest surgery lung operation, so that the two lungs are separated while the lungs of a patient are ventilated, and the phenomenon that secretions, interstitial fluid or blood in the lung which is subjected to the operation enters the other lung to infect the lung which is not subjected to the operation is avoided, and the protection effect is achieved.
At present, the existing single-cavity bronchial cannula has smaller inner diameter, larger outer diameter and larger damage to the cannula, is easy to cause cannula complications when in use, brings danger to the treatment of patients and also buries hidden dangers of medical accidents and contradictions between doctors and patients; the existing single-cavity bronchial catheter has a simple structure, needs to be assisted by a laryngoscope when in use, needs to use a bronchofiberscope to perform auxiliary positioning, has large wound when in use, long anesthesia induction time, large drug dosage, can not improve anesthesia safety, is expensive in bronchofiberscope equipment, is easy to damage, has high requirements on technical operation, needs to be cleaned and sterilized after each patient uses the bronchofiberscope, increases the workload, is not thorough in sterilization and is easy to cause cross infection; the existing single-cavity bronchial catheter lacks a lower air suction pipeline of a cuff and cannot suck interstitial fluid, secretion or blood in the lung; the video acquisition module of the existing visual single-cavity bronchial catheter mostly has the problems that the video acquisition module adopts a camera image acquisition module, an emission module, a data transmission module and other circuits which are integrally formed, the cost is higher, an image processor has large heat productivity, the internal tissues of a human body are easy to burn, and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a functional visual single-cavity bronchial cannula which comprises the following components:
the technical scheme of the invention is realized as follows:
a multifunctional visual single-cavity bronchial cannula comprises a main ventilation tube assembly, a main tracheal cuff assembly, a bronchial cuff assembly, an intrabronchial balloon assembly, a visual data system assembly, a flushing cavity assembly and a suction cavity assembly,
the main ventilation pipe assembly comprises a main ventilation pipe, a main ventilation outlet arranged at the front end of the main ventilation pipe and a main ventilation inlet arranged at the rear end of the main ventilation pipe, wherein a main ventilation interface is arranged at the main ventilation inlet, a ventilation branch pipe is connected to the front end of the main ventilation pipe, and the front end of the ventilation branch pipe comprises a branch ventilation outlet;
the main gas pipe sleeve bag component comprises a main gas pipe sleeve bag, a main gas filling pipe, a main indicating gas bag and a main check valve, the main gas pipe sleeve bag is sleeved at the front end of the main gas pipe and does not shield a main gas outlet, one end of the main gas filling pipe is connected with the main gas pipe sleeve bag, the other end of the main gas filling pipe is sequentially connected with the main indicating gas bag and the main check valve, and a main gas filling interface is arranged at the main check valve;
the bronchial cuff assembly comprises a bronchial cuff, a branch inflation tube, a branch indicating air bag and a branch check valve, the bronchial cuff is sleeved at the front end of the ventilation branch tube and does not shield a branch ventilation outlet, one end of the branch inflation tube is connected with the bronchial cuff, the other end of the branch inflation tube is sequentially connected with the branch indicating air bag and the branch check valve, and a branch inflation interface is arranged at the branch check valve;
the endobronchial balloon assembly comprises an endobronchial balloon, a endobronchial balloon inflation tube, an indicating balloon and a balloon check valve, wherein the endobronchial balloon is arranged inside the ventilation branch tube and is sequentially connected with the indicating balloon and the balloon check valve through the endobronchial balloon inflation tube;
the visual data system component comprises a camera, a data transmission line, a split-type image processor and a data interface, wherein the camera is arranged at the main ventilation outlet, one end of the data transmission line is connected with the camera, and the other end of the data transmission line is sequentially connected with the split-type image processor and the data interface;
the flushing cavity assembly comprises a flushing pipe, a flushing joint and a flushing hole, one end of the flushing pipe is connected with the flushing joint, the other end of the flushing pipe is connected with the flushing hole, and the flushing hole is formed in the main ventilation outlet and is opposite to the camera;
the suction cavity assembly comprises a suction pipe, a suction joint and a suction hole, one end of the suction pipe is connected with the suction joint, the other end of the suction pipe is connected with the suction hole, and the suction hole is formed in the main ventilation outlet.
Preferably, the main ventilation pipe and the branch ventilation pipe are internally provided with detachable directional guide wires.
Preferably, the front end parts of the main inflation tube, the branch inflation tube, the data transmission line, the flushing tube and the suction tube are all arranged inside the main ventilation tube, and the rear end parts of the main inflation tube, the branch inflation tube, the data transmission line, the flushing tube and the suction tube are led out through the side edge of the main ventilation tube.
Preferably, the flushing holes comprise a plurality of flushing holes which are respectively arranged at the main ventilation outlet in an equidistant mode and are opposite to the camera.
Compared with the prior art, the invention has the following beneficial effects:
according to the multifunctional visual single-cavity bronchial cannula, the image signals are transmitted to the universal display through the camera at the front end to display the video images in real time, so that the video images of tissues such as the oral cavity, the throat, the trachea, the bronchus and the like and the positions where the tracheal cannula is inserted can be clearly observed in the clinical intubation process, the single-cavity bronchial cannula can be quickly and accurately positioned, the operation from the intubation to the bronchus can be accurately, quickly, safely and effectively completed, the intubation can be assisted by a laryngoscope in the intubation process, the bronchus can be inserted in an auxiliary positioning mode under the guidance of a bronchofiberscope, the difficulty and the complexity of the operation of the single-cavity bronchial cannula are reduced, the operation is simple, convenient and quick, and the damage to human tissues is small; the lung is isolated and ventilated by inflating and deflating the balloon in the bronchus, the traditional double-cavity bronchus intubation structure is changed into single-cavity bronchus intubation, the overall external diameter size of the ventilation tube is reduced, intubation injury and intubation complication are reduced, and the safety and comfort are higher; meanwhile, the front end of the camera is provided with a flushing hole, so that human endocrine adhered to the surface of the camera can be flushed, and the shielding of the visual field of the camera is avoided. Meanwhile, the camera module adopts a split type image processor, so that the problems that the image processor has large heat productivity, easily burns internal tissues of a human body and the like are solved, and the safety is better. In addition single chamber bronchus intubate bronchus cuff lower extreme intubate's front end design has attracts the hole, and traditional intubate only attracts oropharyngeal laryngeal sputum or secretion on the cuff, can't attract airway endocrine, interstitial fluid or blood under the cuff, has certain risk, should attract the hole design and can attract airway endocrine, interstitial fluid or blood under the cuff, can not interrupt the operation of attracting like this in the operation, and the security is higher.
Drawings
FIG. 1 is a schematic structural view of a multifunctional visual single-lumen bronchial cannula according to the present invention;
FIG. 2 is a side view of the FIG. 1 structure (visual data system components not shown).
In the figure: a ventilation main tube assembly 100, a ventilation main tube 110, a main ventilation outlet 120, a main ventilation inlet 130, a main tracheal cuff assembly 200, a main tracheal cuff 210, a main inflation tube 220, a main pilot balloon 230, a main check valve 240, a bronchial cuff assembly 300, a bronchial cuff 310, a branch inflation tube 320, a branch pilot balloon 330, a branch check valve 340, an endobronchial balloon assembly 400, an endobronchial balloon 410, a branch balloon inflation tube 420, a pilot balloon 430, a balloon check valve 440, a visual data system assembly 500, a camera 510, a data transmission line 520, a split image processor 530, a data interface 540, a flushing lumen assembly 600, a flushing tube 610, a flushing junction 620, a flushing orifice 630, a suction lumen assembly 700, a suction tube 710, a suction junction 720, a suction orifice 730, a ventilation manifold 800, a branch ventilation inlet 810, a directional guidewire 900.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown.
As shown in fig. 1 to 2, a multifunctional visual single-lumen bronchial cannula comprises a main ventilation tube assembly 100, a main tracheal cuff assembly 200, a bronchial cuff assembly 300, an endobronchial balloon assembly 400, a visual data system assembly 500, a flushing lumen assembly 600 and a suction lumen assembly 700, wherein the main ventilation tube assembly 100 comprises a main ventilation tube 110, a main ventilation outlet 120 arranged at the front end of the main ventilation tube 110 and a main ventilation inlet 130 arranged at the rear end of the main ventilation tube 110, a main ventilation interface 140 is arranged at the main ventilation inlet 130, a main ventilation branch tube 800 is connected to the front end of the main ventilation tube 110, a branch ventilation outlet 810 is arranged at the front end of the branch ventilation tube 800, the branch ventilation inlet 810 is connected to the front end of the main ventilation tube 110, and the main ventilation interface 140 is used for connecting with external breathing machines and other devices; the main tracheal cuff assembly 200 comprises a main tracheal cuff 210, a main inflation tube 220, a main indicating air bag 230 and a main check valve 240, wherein the main tracheal cuff 210 is sleeved at the front end of the main ventilation tube 110 and does not block the main ventilation outlet 120, one end of the main inflation tube 220 is connected with the main tracheal cuff 210, the other end of the main inflation tube 220 is sequentially connected with the main indicating air bag 230 and the main check valve 240, a main inflation interface 250 is arranged at the main check valve 240, the main tracheal cuff 210 plays a limiting and sealing role on the main ventilation tube 110, and the main tracheal cuff 210 inflates air after the completion of intubation; the bronchial cuff assembly 300 comprises a bronchial cuff 310, a branch inflation tube 320, a branch indicating air bag 330 and a branch check valve 340, wherein the bronchial cuff 310 is sleeved at the front end of the inflation branch tube 800 and does not block a branch inflation outlet 810, one end of the branch inflation tube 320 is connected with the bronchial cuff 310, the other end of the branch inflation tube 320 is sequentially connected with the branch indicating air bag 330 and the branch check valve 340, and the branch check valve 340 is provided with a branch inflation interface 350; the endobronchial balloon assembly 400 comprises an endobronchial balloon 410, a endobronchial balloon inflation tube 420, an indication balloon 430 and a balloon check valve 440, wherein the endobronchial balloon 410 is arranged inside the ventilation branch tube 800, the endobronchial balloon 400 is sequentially connected with the indication balloon 430 and the balloon check valve 440 through the endobronchial balloon inflation tube 410, the endobronchial balloon 410 is inflated and deflated to carry out lung isolation ventilation, the traditional double-cavity endobronchial intubation structure is changed into a single-cavity endobronchial intubation, and the overall outer diameter size of the ventilation tube can be reduced; the visual data system component 500 comprises a camera 510, a data transmission line 520, a split-type image processor 530 and a data interface 540, wherein the camera 510 is arranged at the main ventilation outlet 120, one end of the data transmission line 520 is connected with the camera 510, the other end of the data transmission line is sequentially connected with the split-type image processor 530 and the data interface 540, and the split-type image processor 530 is arranged, so that an image processing component with serious heat dissipation is positioned at the external part of the human body during intubation, and the problems of burning internal tissues of the human body and the like can be avoided; the flushing cavity assembly 600 comprises a flushing pipe 610, a flushing joint 620 and a flushing hole 630, one end of the flushing pipe 610 is connected with the flushing joint 620, the other end of the flushing pipe is connected with the flushing hole 630, the flushing hole 630 is arranged at the main ventilation outlet 120 and is opposite to the camera 510, when the camera 510 is shielded by foreign matters on an external display device during intubation, the flushing assembly 600 is started, the flushing hole 630 is used for flushing the camera 510, the surface of the camera 510 is clear and clean, the flushing holes 630 are arranged at the main ventilation outlet 120 at equal intervals and are opposite to the camera 510, and therefore the camera 510 can be cleaned without dead corners, and the cleaning effect is improved; the suction cavity assembly 700 comprises a suction tube 710, a suction joint 720 and a suction hole 730, one end of the suction tube 710 is connected with the suction joint 720, the other end of the suction tube 710 is connected with the suction hole 730, the suction hole 730 is arranged at the main ventilation outlet 120, the suction hole 730 can comprise a plurality of suction holes, the suction holes are respectively arranged at the positions of the main ventilation outlet 120, and nearby tissue fluid, secretion and the like can be sucked in a large range. The detachable directional guide wires 900 are arranged in the main ventilation pipe 110 and the branch ventilation pipe 800, and when in intubation, a doctor can determine the depth of the directional guide wires 900 extending into the main ventilation pipe 110 and the branch ventilation pipe 800 according to needs and then bend the directional guide wires correspondingly. The front end parts of the main inflation tube 220, the branch inflation tube 320, the data transmission line 520, the irrigation tube 610 and the suction tube 710 are all arranged inside the main ventilation tube 110, and the rear end parts of the main inflation tube 220, the branch inflation tube 320, the data transmission line 520, the irrigation tube 610 and the suction tube 710 are led out through the side edge of the main ventilation tube 110.
The multifunctional visual single-cavity bronchial cannula is provided with the visual data system with the camera at the front end, when the cannula is operated, the camera at the front end transmits image signals to the universal display to display video images in real time, so that the video images of tissues such as oral cavity, throat, trachea, bronchus and the like and the insertion position of the tracheal cannula can be clearly observed in the clinical cannula inserting process, the single-cavity bronchial cannula is quickly and accurately positioned, the operation from the cannula to the bronchus can be accurately, quickly, safely and effectively completed, the intubation to the bronchus can be assisted and positioned without a laryngoscope and the bronchofiberscope, the difficulty and the complexity of the single-cavity bronchial cannula are reduced, the operation is simple, convenient and quick, and the damage to human tissues is small; the lung is isolated and ventilated by inflating and deflating the balloon in the bronchus, the traditional double-cavity bronchus intubation structure is changed into single-cavity bronchus intubation, the overall external diameter size of the ventilation tube is reduced, intubation injury and intubation complication are reduced, and the safety and comfort are higher; meanwhile, the front end of the camera is provided with a flushing hole, so that human endocrine adhered to the surface of the camera can be flushed, and the shielding of the visual field of the camera is avoided. Meanwhile, the camera module adopts a split type image processor, so that the problems that the image processor has large heat productivity, easily burns internal tissues of a human body and the like are solved, and the safety is better. In addition single chamber bronchus intubate bronchus cuff lower extreme intubate's front end design has attracts the hole, and traditional intubate only attracts oropharyngeal laryngeal sputum or secretion on the cuff, can't attract airway endocrine, interstitial fluid or blood under the cuff, has certain risk, should attract the hole design and can attract airway endocrine, interstitial fluid or blood under the cuff, can not interrupt the operation of attracting like this in the operation, and the security is higher.

Claims (4)

1. A multifunctional visual single-cavity bronchial cannula is characterized by comprising a main ventilation pipe assembly, a main tracheal cuff assembly, a bronchial cuff assembly, an intrabronchial balloon assembly, a visual data system assembly, a flushing cavity assembly and a suction cavity assembly,
the main ventilation pipe assembly comprises a main ventilation pipe, a main ventilation outlet arranged at the front end of the main ventilation pipe and a main ventilation inlet arranged at the rear end of the main ventilation pipe, wherein a main ventilation interface is arranged at the main ventilation inlet, a ventilation branch pipe is connected to the front end of the main ventilation pipe, and the front end of the ventilation branch pipe comprises a branch ventilation outlet;
the main gas pipe sleeve bag component comprises a main gas pipe sleeve bag, a main gas filling pipe, a main indicating gas bag and a main check valve, the main gas pipe sleeve bag is sleeved at the front end of the main gas pipe and does not shield a main gas outlet, one end of the main gas filling pipe is connected with the main gas pipe sleeve bag, the other end of the main gas filling pipe is sequentially connected with the main indicating gas bag and the main check valve, and a main gas filling interface is arranged at the main check valve;
the bronchial cuff assembly comprises a bronchial cuff, a branch inflation tube, a branch indicating air bag and a branch check valve, the bronchial cuff is sleeved at the front end of the ventilation branch tube and does not shield a branch ventilation outlet, one end of the branch inflation tube is connected with the bronchial cuff, the other end of the branch inflation tube is sequentially connected with the branch indicating air bag and the branch check valve, and a branch inflation interface is arranged at the branch check valve;
the endobronchial balloon assembly comprises an endobronchial balloon, a endobronchial balloon inflation tube, an indicating balloon and a balloon check valve, wherein the endobronchial balloon is arranged inside the ventilation branch tube and is sequentially connected with the indicating balloon and the balloon check valve through the endobronchial balloon inflation tube;
the visual data system component comprises a camera, a data transmission line, a split-type image processor and a data interface, wherein the camera is arranged at the main ventilation outlet, one end of the data transmission line is connected with the camera, and the other end of the data transmission line is sequentially connected with the split-type image processor and the data interface;
the flushing cavity assembly comprises a flushing pipe, a flushing joint and a flushing hole, one end of the flushing pipe is connected with the flushing joint, the other end of the flushing pipe is connected with the flushing hole, and the flushing hole is formed in the main ventilation outlet and is opposite to the camera;
the suction cavity assembly comprises a suction pipe, a suction joint and a suction hole, one end of the suction pipe is connected with the suction joint, the other end of the suction pipe is connected with the suction hole, and the suction hole is formed in the main ventilation outlet.
2. The multifunctional visual single lumen endotracheal tube of claim 1 wherein the main ventilation tube and the branch ventilation tube have removable directional guide wires disposed therein.
3. The multifunctional visual type single-lumen bronchial cannula according to claim 3, wherein the front end portions of the main inflation tube, the branch inflation tube, the data transmission line, the irrigation tube and the suction tube are all arranged inside the main ventilation tube, and the rear end portions of the main inflation tube, the branch inflation tube, the data transmission line, the irrigation tube and the suction tube are led out through the side of the main ventilation tube.
4. The multifunctional visual single-lumen bronchial cannula according to claim 3, wherein said flushing holes comprise a plurality of holes, respectively equidistantly arranged at the main ventilation outlet and all facing the camera.
CN202011302723.9A 2020-11-19 2020-11-19 Multifunctional visual single-cavity bronchial cannula Pending CN112316267A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011302723.9A CN112316267A (en) 2020-11-19 2020-11-19 Multifunctional visual single-cavity bronchial cannula

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011302723.9A CN112316267A (en) 2020-11-19 2020-11-19 Multifunctional visual single-cavity bronchial cannula

Publications (1)

Publication Number Publication Date
CN112316267A true CN112316267A (en) 2021-02-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011302723.9A Pending CN112316267A (en) 2020-11-19 2020-11-19 Multifunctional visual single-cavity bronchial cannula

Country Status (1)

Country Link
CN (1) CN112316267A (en)

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