CN110960767A - Double-tube bite-block protection type high-frequency jet oxygen sputum suction flow director - Google Patents

Double-tube bite-block protection type high-frequency jet oxygen sputum suction flow director Download PDF

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Publication number
CN110960767A
CN110960767A CN202010079086.7A CN202010079086A CN110960767A CN 110960767 A CN110960767 A CN 110960767A CN 202010079086 A CN202010079086 A CN 202010079086A CN 110960767 A CN110960767 A CN 110960767A
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CN
China
Prior art keywords
tube
sputum suction
pipe
sleeve
double
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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
CN202010079086.7A
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Chinese (zh)
Inventor
田海涛
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田海涛
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Application filed by 田海涛 filed Critical 田海涛
Priority to CN202010079086.7A priority Critical patent/CN110960767A/en
Publication of CN110960767A publication Critical patent/CN110960767A/en
Pending legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/0023Suction drainage systems
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/04Tracheal tubes
    • A61M16/0463Tracheal tubes combined with suction tubes, catheters or the like; Outside connections
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/04Tracheal tubes
    • A61M16/0488Mouthpieces; Means for guiding, securing or introducing the tubes
    • A61M16/049Mouthpieces
    • A61M16/0493Mouthpieces with means for protecting the tube from damage caused by the patient's teeth, e.g. bite block
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M2202/00Special media to be introduced, removed or treated
    • A61M2202/02Gases
    • A61M2202/0208Oxygen

Abstract

The invention discloses a double-tube bite block protective high-frequency jet oxygen sputum suction flow director, which comprises an oropharyngeal flow guide tube, a sputum suction tube, an occlusion cushion cover and a sleeve; the cannula is transversely provided with a sputum suction tube outer interface penetrating through the sputum suction tube in a penetrating manner, the front end of the cannula is provided with a flow guide tube bayonet clamped with the oropharyngeal flow guide tube, and the flow guide tube bayonet transversely penetrates through the cannula; a retainer ring for limiting is arranged on the outer wall of the sleeve, and the meshing cushion cover is assembled outside the sleeve; the double-tube mouthpiece cushion type silica gel oropharynx air duct has the advantages of simple structure, convenience in operation, smoothness in oxygen delivery, sputum suction and air exhaust for patients, reduction in pain of the patients, reduction in cost, safety and stability in use, and wide application in equipment for high-frequency oxygen injection, sputum suction and flow-guiding respiration of various patients with dyspnea.

Description

Double-tube bite-block protection type high-frequency jet oxygen sputum suction flow director
Technical Field
The invention relates to a double-tube bite block protection type high-frequency jet oxygen sputum suction flow guider.
Background
With the increasing air pollution, the incidence of lung diseases is rising year by year, the lung cancer in malignant tumor is the first, and up to 78.7 thousands of people in the country, and more patients need Painless diagnosis and treatment by electronic bronchoscope (PLVB). Good ventilation measures are of great significance to the smooth implementation of PLVB. Various ventilation measures adopted at present have certain defects, for example, the existing ventilation mediation tool often compete for airway space with electronic bronchoscopes (PLVB), and an anaesthetist is often required to stand on the head to perform mask pressurization auxiliary ventilation in an operation, so that much inconvenience is caused in LVB operation and rescue, so that the phenomenon of competing for airway is avoided, ventilation management can be facilitated, a good ventilation effect is obtained, and the problem to be solved in PLVB examination is solved; high Frequency Jet Ventilation (HFJV) provides a rapid jet flow of high frequency, low tidal volume, below or near the volume of the anatomical dead space, easily allows the flow to pass through small spaces, still maintains sufficient distal alveolar gas exchange in LVB-occupied and respiratory suppressed states, does not produce hypoxemia, does not cause excessive endogenous airway pressure, and does not inhibit hemodynamic function when respiratory suppressed occurs in PLVB examinations. As LVB usage increases, HFJV applications are emerging again, and existing HFJVs mostly take the following mediation tools: nasal catheter, endoscope mask, tracheal catheter, laryngeal mask and the like to improve the ventilation efficiency and improve the blood oxygen concentration. However, in PLVB examination, the nasal catheter mediated HFJV has the defects that the nasal catheter is easy to fall off due to the jet pressure, the ventilation is poor, the nasal permeability is dependent on, and the side with good nasal permeability is the conventional LVB (low volume nasal buffer) implantation path, and meanwhile, the possibility that the nasal turbinate is dry and the secretion of the upper respiratory tract is blown into the lung to cause or aggravate the lung infection exists; although the HFJV mediated by an endoscope mask, an endotracheal tube, a laryngeal mask and the like can obviously improve the ventilation effect compared with a nasal tube, the problem that a ventilation tool and an LVB compete for airway space is not effectively solved, the suction cannot be timely and effectively enhanced, the problem that backflow aspiration causes oxygen deficiency is solved, the cost of the three is relatively high, and the operation is not simple and convenient enough. And therefore improvements thereof are necessary. With respect to various limitations of the conventional ventilation mediating tools and ventilation measures of PLVB and the anatomical characteristics of pharyngeal cavity, a double-tube bite pad protective high-frequency jet oxygen sputum aspiration diversion oropharyngeal airway is designed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a double-pipe bite block protection type high-frequency jet oxygen sputum suction flow guider.
In order to solve the problems, the invention adopts the following technical scheme:
a double-tube bite-block protective high-frequency jet oxygen sputum suction flow director comprises an oropharyngeal flow guide tube, a sputum suction tube, an occlusion cushion cover and a sleeve; the cannula is transversely provided with a sputum suction tube outer interface penetrating through the sputum suction tube in a penetrating manner, the front end of the cannula is provided with a flow guide tube bayonet clamped with the oropharyngeal flow guide tube, and the flow guide tube bayonet transversely penetrates through the cannula; the assembly is in sheathed tube outer wall department is provided with spacing retaining ring of usefulness, the interlock covers the cover and is assembled sheathed tube outside, and the interlock covers the cover and is spacing be in the left side position department of retaining ring, the inboard position department that the interlock covers is moulded plastics and is formed with the centre gripping the internal orifice that the oropharynx water conservancy diversion was used, the right side position department of oropharynx water conservancy diversion is provided with sub-connector, through sub-connector cooperation has female connecting piece, sub-connector with form sealedly after the cooperation between the female connecting piece, through the high-frequency injection oxygen breathing machine of peripheral hardware is connected to female connecting piece.
Preferably, the outer surface of the meshing cushion cover is uniformly provided with meshing grains.
When the device is used, the top of the oropharyngeal flow guide pipe and the top end of the sputum suction pipe are respectively inserted into the pharyngeal portion of the oral cavity, the bite-piece pad sleeve is placed between the upper teeth and the lower teeth of a patient, the other end of the sputum suction pipe is communicated with the sputum aspirator, the sputum aspirator is started, sputum in the oral cavity of the patient reaches the sputum aspirator through the sputum suction pipe to be discharged, and the effect of sucking the sputum in the oral cavity of the patient is achieved; open the high-frequency injection oxygen breathing machine, the oxygen of high-frequency injection oxygen breathing machine is carried to the oropharynx honeycomb duct in through the cooperation of female connecting piece and sub-connection, and through the top of oropharynx honeycomb duct, oxygen reachs patient's oropharynx intracavity, reaches the effect to patient's oropharynx intracavity high-frequency injection oxygen, realizes that the double-barrelled bite mouth pad of patient's oral cavity pharynx protects formula high-frequency injection oxygen and inhale the unobstructed purpose of phlegm water conservancy diversion breathing.
Preferably, the surface machining of retaining ring has fixedly the fixed orifices that the interlock pad was used mechanically, the right-hand member of interlock pad cover is moulded plastics and is formed with spherical locating piece, pass right after the locating piece deformation the fixed orifices, this moment the interlock pad cover with it is fixed between the retaining ring.
Preferably, the sub-connecting piece comprises an inserting pipe, the left side of the inserting pipe is provided with a plurality of conical sealing surfaces, a fault plane is formed between every two adjacent sealing surfaces, a first check ring is formed on the outer wall of the inserting pipe in an injection molding mode, and the first check ring is located on the right side of the sealing surfaces; a joint is formed at the right end of the insertion pipe in an injection molding mode, an inner pipe is formed on the inner side of the joint in an injection molding mode, and a communicated inner hole is formed between the inner pipe and the insertion pipe; a plurality of reinforcing plates are formed between the joint and the insertion pipe in an injection molding manner; the female connecting piece comprises a first inserting pipe, a second check ring is arranged on the outer wall of the first inserting pipe, a first reinforcing plate is formed between the left side of the second check ring and the first inserting pipe in an injection molding mode, a plurality of conical first sealing surfaces are formed on the right side of the first inserting pipe in an injection molding mode, and a first fault surface is formed between every two adjacent first sealing surfaces; the first inserting pipe is in threaded connection with the joint, and the inner pipe is inserted into the inner side of the first inserting pipe; the left end of the insertion tube is inserted into the saliva suction tube, the sealing surface is inserted into the saliva suction tube and then sealed with the saliva suction tube, and the right end opening of the saliva suction tube is closed at the fault plane and then sealed; the right end of the first inserting pipe is inserted into an air supply hose of the high-frequency jet oxygen breathing machine.
The invention has the beneficial effects that: the double-tube bite pad protective high-frequency jet oxygen sputum suction flow director has the advantages of simple structure and convenience in operation, and the double-tube bite pad protective high-frequency jet oxygen sputum suction flow director is safe and stable to use, is safe and stable in use, can smoothly convey oxygen to a patient, suck sputum and exhaust air, reduces pain of the patient, and is widely used for high-frequency jet oxygen, sputum suction and flow-guiding breathing equipment of various patients with dyspnea.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a side view of the bite block sleeve in the state of embodiment 1;
FIG. 3 is a left side view of the sleeve in the state of embodiment 1;
FIG. 4 is a left side view of the sleeve in the state of embodiment 2;
FIG. 5 is a front view of the bite block set in the state of embodiment 2;
FIG. 6 is a front view of the sub-link;
FIG. 7 is a cross-sectional view of the sub-connector;
FIG. 8 is an enlarged partial view of the sub-link at A;
fig. 9 is a front view of the female connector.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
In the description of the present invention, it is to be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
Further, in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "sleeved," "connected," "penetrating," "plugged," and the like are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example 1
Referring to fig. 1, 2 and 3, the double-tube bite block protective high-frequency jet oxygen sputum aspirator comprises an oropharyngeal flow guide tube 1, a sputum aspirating tube 2, a bite cushion cover 3 and a sleeve 4; the cannula 4 is transversely provided with a sputum suction tube outer interface 401 which penetrates through the sputum suction tube 2 in a penetrating manner, the front end of the cannula 4 is provided with a guide tube bayonet 402 which is used for clamping the oropharyngeal guide tube 1, and the guide tube bayonet 402 transversely penetrates through the cannula 4; the outer wall department of sleeve pipe 4 is provided with spacing retaining ring 403 of usefulness, the interlock covers 3 assemblies and is in the outside of sleeve pipe 4, and the interlock covers 3 by spacing the left side position department of retaining ring 403, the inboard position department that the interlock covers 3 moulds plastics and is formed with the centre gripping oropharynx honeycomb duct 1 is used interior mouthful 302, oropharynx honeycomb duct 1's right side position department is provided with sub-connector 5, through sub-connector 5 cooperates and has female connector 6, sub-connector 5 with form sealedly after the cooperation between female connector 6, through female connector 6 connects the high-frequency injection oxygen breathing machine of peripheral hardware.
The outer surface of the meshing cushion cover 3 is uniformly provided with meshing grains 301.
When the device is used, the top of the oropharyngeal flow guide pipe 1 and the top end of the sputum suction pipe 2 are inserted into the oral cavity and the pharynx respectively, the bite cushion cover 3 is placed between the upper teeth and the lower teeth of a patient, the other end of the sputum suction pipe 2 is communicated with the sputum aspirator, the sputum aspirator is started, sputum in the oral cavity of the patient reaches the sputum aspirator through the sputum suction pipe 2 to be discharged, and the effect of sucking the sputum in the oral cavity of the patient is achieved; open the high-frequency injection oxygen breathing machine, the oxygen of high-frequency injection oxygen breathing machine is carried to oropharynx honeycomb duct 1 in through the cooperation of female connecting piece and son connection, through oropharynx honeycomb duct 1's top, and oxygen reachs patient's oropharynx intracavity, reaches the effect to patient's oropharynx intracavity high-frequency injection oxygen, realizes that the double-barrelled bite of patient's oral cavity pharyngeal portion fills up protective type high-frequency injection oxygen and inhales phlegm water conservancy diversion and breathe unobstructed purpose.
Example 2
Referring to fig. 4 and 5, the difference from embodiment 1 is that: the surface machining of retaining ring 4 has fixedly the fixed orifices 411 that the interlock cover 3 was used, the right-hand member of interlock cover 3 is moulded plastics and is formed with spherical locating piece 311, pass right behind the locating piece 311 deformation the fixed orifices 411, this moment the interlock cover 3 with it is fixed between the retaining ring 4.
Example 3
Referring to fig. 6, 7, 8 and 9, in an embodiment of the present invention, the sub-connector 5 includes a plug pipe 501, the left side of the plug pipe 501 has a plurality of tapered sealing surfaces 511, a fracture surface 512 is formed between two adjacent sealing surfaces 511, a first retainer ring 502 is formed on the outer wall of the plug pipe 501 by injection molding, and the first retainer ring 502 is located at the right position of the sealing surface 511; a joint 503 is formed at the right end of the insertion pipe 501 in an injection molding manner, an inner pipe 504 is formed at the inner side of the joint 503 in an injection molding manner, and a communicated inner hole 513 is formed between the inner pipe 504 and the insertion pipe 501; a plurality of reinforcing plates 514 are formed between the joint 503 and the splicing pipe 501 through injection molding; the female connecting piece 6 comprises a first plug pipe 601, a second retainer ring 602 is arranged on the outer wall of the first plug pipe 601, a first reinforcing plate 611 is formed between the left side of the second retainer ring 602 and the first plug pipe 601 through injection molding, a plurality of tapered first sealing surfaces 612 are formed on the right side of the first plug pipe 601 through injection molding, and a first cross-section surface 613 is formed between every two adjacent first sealing surfaces 612; the first plug pipe 601 is connected with the joint 503 by screw thread, and the inner pipe 504 is inserted into the inner side of the first plug pipe 601; the left end of the insertion tube 501 is inserted into the Kouyou cigarette sputum suction tube 1, the sealing surface 511 is inserted into the Kouyou cigarette sputum suction tube 1 and then forms a seal with the Kouyou cigarette sputum suction tube 1, and the right end opening of the Kouyou cigarette sputum suction tube 1 is sealed after closing up at the fault plane 512; the right end of the first insertion pipe 601 is inserted into the air supply hose of the high-frequency jet oxygen respirator.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (4)

1. The utility model provides a phlegm divertor is inhaled to double-barrelled bite-block protection formula high frequency injection oxygen which characterized in that: comprises an oropharyngeal flow guide tube (1), a sputum suction tube (2), an occluding cushion cover (3) and a sleeve (4); the sputum suction tube external connector (401) which penetrates through the sputum suction tube (2) is transversely arranged at the front end of the sleeve (4) in a penetrating manner, a guide tube bayonet (402) which is clamped on the oropharyngeal guide tube (1) is arranged at the front end of the sleeve (4), the guide tube bayonet (402) transversely penetrates through the sleeve (4), a stop ring (403) for limiting is arranged at the outer wall of the sleeve (4), the occlusion cushion cover (3) is assembled outside the sleeve (4), the occlusion cushion cover (3) is limited at the left side position of the stop ring (403), an inner opening (302) for clamping the oropharyngeal guide tube (1) is formed at the inner side position of the occlusion cushion cover (3) in an injection molding manner, a sub-connector (5) is arranged at the right side position of the oropharyngeal guide tube (1), and a female connector (6) is matched through the sub-connector (5), the secondary connecting piece (5) and the primary connecting piece (6) are matched to form a seal, and the primary connecting piece (6) is connected with an external high-frequency jet oxygen breathing machine.
2. The double-tube bite-block protective high-frequency jet oxygen sputum aspirator of claim 1, wherein: the outer surface of the meshing cushion cover (3) is uniformly provided with meshing grains (301).
3. The double-tube bite-block protective high-frequency jet oxygen sputum aspirator of claim 1, wherein: the surface machining of retaining ring (4) has fixedly the fixed orifices (411) that interlock pad cover (3) were used, the right-hand member of interlock pad cover (3) is moulded plastics and is formed with spherical locating piece (311), pass to the right side locating piece (311) deformation back fixed orifices (411), this moment interlock pad cover (3) with it is fixed between retaining ring (4).
4. The double-tube bite-block protective high-frequency jet oxygen sputum aspirator of claim 1, wherein: the sub-connecting piece (5) comprises an inserting pipe (501), the left side of the inserting pipe (501) is provided with a plurality of conical sealing surfaces (511), a fault surface (512) is formed between every two adjacent sealing surfaces (511), a first retainer ring (502) is formed on the outer wall of the inserting pipe (501) in an injection molding mode, and the first retainer ring (502) is located on the right side of the sealing surfaces (511); a joint (503) is formed at the right end of the insertion pipe (501) in an injection molding mode, an inner pipe (504) is formed on the inner side of the joint (503) in an injection molding mode, and a communicated inner hole (513) is formed between the inner pipe (504) and the insertion pipe (501); a plurality of reinforcing plates (514) are formed between the joint (503) and the insertion pipe (501) in an injection molding mode; the female connecting piece (6) comprises a first inserting-connecting pipe (601), a second check ring (602) is arranged on the outer wall of the first inserting-connecting pipe (601), a first reinforcing plate (611) is formed between the left side of the second check ring (602) and the first inserting-connecting pipe (601) in an injection molding mode, a plurality of conical first sealing surfaces (612) are formed on the right side of the first inserting-connecting pipe (601) in an injection molding mode, and a first cross section surface (613) is formed between every two adjacent first sealing surfaces (612); the first inserting tube (601) is in threaded connection with the connector (503), the inner tube (504) is inserted into the inner side of the first inserting tube (601), the left end of the inserting tube (501) is inserted into the oral cigarette sputum suction tube (1), the sealing surface (511) is inserted into the oral cigarette sputum suction tube (1) and then sealed with the oral cigarette sputum suction tube, the right end opening of the oral cigarette sputum suction tube (1) is closed at the fault surface (512) and then sealed, and the right end of the first inserting tube (601) is inserted into an air supply hose of the high-frequency jet oxygen breathing machine.
CN202010079086.7A 2020-02-03 2020-02-03 Double-tube bite-block protection type high-frequency jet oxygen sputum suction flow director Pending CN110960767A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010079086.7A CN110960767A (en) 2020-02-03 2020-02-03 Double-tube bite-block protection type high-frequency jet oxygen sputum suction flow director

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010079086.7A CN110960767A (en) 2020-02-03 2020-02-03 Double-tube bite-block protection type high-frequency jet oxygen sputum suction flow director

Publications (1)

Publication Number Publication Date
CN110960767A true CN110960767A (en) 2020-04-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010079086.7A Pending CN110960767A (en) 2020-02-03 2020-02-03 Double-tube bite-block protection type high-frequency jet oxygen sputum suction flow director

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112755270A (en) * 2021-01-18 2021-05-07 佳木斯大学 Sputum suction device for ward nursing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112755270A (en) * 2021-01-18 2021-05-07 佳木斯大学 Sputum suction device for ward nursing
CN112755270B (en) * 2021-01-18 2022-05-24 佳木斯大学 Sputum suction device for ward nursing

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