CN215961645U - Autonomous sputum excretion type double-cavity trachea cannula - Google Patents
Autonomous sputum excretion type double-cavity trachea cannula Download PDFInfo
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- CN215961645U CN215961645U CN202121785198.0U CN202121785198U CN215961645U CN 215961645 U CN215961645 U CN 215961645U CN 202121785198 U CN202121785198 U CN 202121785198U CN 215961645 U CN215961645 U CN 215961645U
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Abstract
The utility model provides an autonomous sputum excretion type double-cavity tracheal cannula, and relates to the technical field of medical instruments. It includes endotracheal tube, the three-way pipe, air flue chamber pipe and sputum discharging chamber pipe, endotracheal tube communicates with the single-end of three-way pipe, the double-end of three-way pipe is linked together with air flue chamber pipe and sputum discharging chamber pipe respectively, the one end that the three-way pipe was kept away from to air flue chamber pipe communicates with the breathing machine, the three-way pipe makes two-chamber endotracheal tube have the function of supplementary sputum discharging, the severe patient who uses the breathing machine is under the prerequisite of not disconnecting the pipeline, under the condition of malleation ventilation, can be through sputum discharging chamber pipe to external direction sputum discharging, make things convenient for sputum discharging chamber pipe to carry out the trachea suction phlegm and under the general condition simultaneously in the closed, realize independently sputum discharging, the three-way pipe has limiting displacement simultaneously, it is too deep to avoid endotracheal tube to insert in the trachea, thereby avoid the condition that the unilateral lung ventilates and the opposite side is not ventilated to take place, promote patient's use and experience, ensure safety.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to an autonomous sputum excretion type double-cavity tracheal cannula.
Background
A dual lumen endotracheal tube is a medical device for establishing an artificial airway through which a passageway is established between the body and a ventilator. The double-cavity bronchial catheter is widely applied to the most extensive and mature lung isolation technology of thoracic surgery, belongs to a unilateral lung ventilation tool, and can be arranged in a left or right main bronchus to implement single lung isolation and single lung ventilation.
The applicant finds that at least the following technical problems exist in the prior art: at present, when a double-cavity trachea cannula is used for patients in respiratory system diseases, general anesthesia operation treatment and emergency rescue, a sputum suction pipe is often used for sucking secretions in a respiratory tract out so as to keep the respiratory tract unblocked and prevent complications such as aspiration pneumonia and asphyxia. When the traditional sputum suction tube is operated, the problems of tissue hypoxia, cross infection and the like are easily caused due to the fact that a breathing machine and the respiratory tract of a patient need to be disconnected.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an autonomous sputum excretion type double-cavity tracheal cannula, which aims to solve the technical problem that a breathing machine needs to be disconnected during sputum suction operation of the double-cavity tracheal cannula in the prior art. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the utility model are described in detail in the following.
In order to achieve the purpose, the utility model provides the following technical scheme:
the utility model provides an independently phlegm discharging type two-chamber trachea cannula, includes endotracheal tube, three-way pipe, air flue chamber pipe and phlegm discharging chamber pipe, endotracheal tube with the single-end of three-way pipe is held and is linked together, the double-end of three-way pipe respectively with air flue chamber pipe with phlegm discharging chamber pipe is linked together, the one end that air flue chamber pipe kept away from the three-way pipe is linked together with the breathing machine.
Preferably, one end of the sputum excretion cavity catheter, which is far away from the three-way pipe, is connected with a valve, and the valve can adjust the cavity radius of the sputum excretion cavity catheter.
Preferably, the outlet end of the valve is provided with a piston which can block the outlet end.
Preferably, the outlet end of the valve is detachably connected with a sputum suction tube or a closed sputum suction tube, and the sputum suction tube or the closed sputum suction tube can wash out viscous sputum.
Preferably, one end of the sputum discharging cavity catheter, which is far away from the three-way pipe, is connected with a sputum storage tank, and the sputum storage tank can collect sputum discharged from the sputum discharging cavity catheter.
Preferably, the tracheal catheter further comprises an inflation cuff and an inflation catheter, wherein the inflation cuff is arranged on the outer wall of the tracheal catheter and is communicated with the inflation catheter.
Preferably, the shape of the tee is a hypotenuse Y-shape.
Preferably, the tee is pant-type in shape.
Preferably, the tee is a tee with equal diameter.
Preferably, the tee pipe is a reducing tee pipe.
The utility model has the beneficial effects that: the autonomous sputum excretion type double-cavity tracheal cannula comprises a tracheal catheter, a three-way pipe, an airway cavity catheter and a sputum excretion cavity catheter, wherein the tracheal catheter is communicated with a single-end of the three-way pipe, the double-end of the three-way pipe is respectively communicated with the airway cavity catheter and the sputum excretion cavity catheter, one end of the airway cavity catheter, which is far away from the three-way pipe, is communicated with a respirator, and the double-cavity tracheal cannula has the function of assisting sputum excretion by arranging the three-way pipe, so that a severe patient using the respirator can excrete sputum to the external direction through the sputum excretion cavity catheter under the condition of positive pressure ventilation on the premise of continuously opening a pipeline, and the sputum excretion can be conveniently carried out in a closed manner by the sputum excretion cavity catheter and in the tracheal suction under the general condition, the autonomous sputum excretion is realized, meanwhile, the three-way pipe can play a certain limiting role through the structural characteristics of the three-way pipe, the tracheal catheter is prevented from being inserted into the trachea, and the situation that the one side lung ventilates and the other side does not ventilate is avoided, the use experience of the patient is improved, and the safety is ensured.
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 block diagram of the present invention;
FIG. 2 is a view showing the construction of the sputum cup of the present invention;
in figure 1, an endotracheal tube;
2. a three-way pipe;
3. an airway lumen conduit;
4. a sputum excretion cavity catheter; 41. a valve; 42. a piston; 43. a sputum storage tank;
51. inflating the cuff; 52. an inflation conduit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "lateral," "length," "width," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "side," and the like, as used herein, are used in the orientation or positional relationship indicated in FIG. 1, merely to facilitate the description of the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
Example one
Referring to fig. 1 and 2, the embodiment provides an autonomous sputum excretion type double-lumen endotracheal tube, which comprises an endotracheal tube 1, a three-way tube 2, an airway lumen catheter 3 and a sputum excretion lumen catheter 4, wherein the endotracheal tube 1 is communicated with a single end of the three-way tube 2, a double end of the three-way tube 2 is respectively communicated with the airway lumen catheter 3 and the sputum excretion lumen catheter 4, one end of the airway lumen catheter 3 away from the three-way tube 2 is communicated with a respirator, the double-lumen endotracheal tube has a function of assisting sputum excretion by being provided with the three-way tube 2, a severe patient using the respirator can excrete sputum to the outside through the sputum excretion lumen catheter 4 under the condition of positive pressure ventilation, and simultaneously, the sputum excretion can be conveniently performed in a closed manner by the airway lumen catheter 4 under the general condition, autonomous sputum excretion is realized, and the three-way tube 2 can play a certain limiting role by the structural characteristics of the three-way tube 2, avoid endotracheal tube 1 to insert too deeply in the trachea to avoid the unilateral lung to ventilate and the not ventilative situation of opposite side to take place, promote patient's use and experience, ensure safety.
Example two
The embodiment provides an autonomous sputum excretion type double-lumen tracheal cannula, which comprises a tracheal catheter 1, a three-way pipe 2, an airway lumen catheter 3 and a sputum excretion lumen catheter 4, wherein the tracheal catheter 1 is communicated with a single-end of the three-way pipe 2, a double-end of the three-way pipe 2 is respectively communicated with the airway lumen catheter 3 and the sputum excretion lumen catheter 4, one end of the airway lumen catheter 3, which is far away from the three-way pipe 2, is communicated with a respirator, and the double-lumen tracheal cannula has the function of assisting sputum excretion by being provided with the three-way pipe 2, so that a severe patient using the respirator can conveniently perform sputum excretion in a closed manner and perform endotracheal sputum excretion under general conditions under the condition of positive pressure ventilation under the premise of continuously opening the pipeline, thereby realizing autonomous sputum excretion, and meanwhile, the three-way pipe 2 can play a certain limiting role through the structural characteristics thereof, avoid endotracheal tube 1 to insert too deeply in the trachea to avoid the unilateral lung to ventilate and the not ventilative situation of opposite side to take place, promote patient's use and experience, ensure safety.
As an optional implementation manner, one end of the sputum excretion cavity conduit 4, which is far away from the three-way pipe 2, is connected with a valve 41, and the valve 41 can adjust the cavity radius of the sputum excretion cavity conduit 4, so as to control the specific sputum excretion amount and flexibly adjust according to the actual use condition.
EXAMPLE III
The embodiment provides an autonomous sputum excretion type double-lumen tracheal cannula, which comprises a tracheal catheter 1, a three-way pipe 2, an airway lumen catheter 3 and a sputum excretion lumen catheter 4, wherein the tracheal catheter 1 is communicated with a single-end of the three-way pipe 2, a double-end of the three-way pipe 2 is respectively communicated with the airway lumen catheter 3 and the sputum excretion lumen catheter 4, one end of the airway lumen catheter 3, which is far away from the three-way pipe 2, is communicated with a respirator, and the double-lumen tracheal cannula has the function of assisting sputum excretion by being provided with the three-way pipe 2, so that a severe patient using the respirator can conveniently perform sputum excretion in a closed manner and perform endotracheal sputum excretion under general conditions under the condition of positive pressure ventilation under the premise of continuously opening the pipeline, thereby realizing autonomous sputum excretion, and meanwhile, the three-way pipe 2 can play a certain limiting role through the structural characteristics thereof, avoid endotracheal tube 1 to insert too deeply in the trachea to avoid the unilateral lung to ventilate and the not ventilative situation of opposite side to take place, promote patient's use and experience, ensure safety.
As an optional implementation manner, one end of the sputum excretion cavity conduit 4, which is far away from the three-way pipe 2, is connected with a valve 41, and the valve 41 can adjust the cavity radius of the sputum excretion cavity conduit 4, so as to control the specific sputum excretion amount and flexibly adjust according to the actual use condition.
As an optional embodiment, the outlet end of the valve 41 is provided with a piston 42, the outlet end can be blocked by the piston 42, and after the piston 42 is removed, the valve 41 can be opened, so that the opening and closing of the valve 41 can be adjusted by the piston 42, and the use is more convenient and quick.
Example four
The embodiment provides an autonomous sputum excretion type double-lumen tracheal cannula, which comprises a tracheal catheter 1, a three-way pipe 2, an airway lumen catheter 3 and a sputum excretion lumen catheter 4, wherein the tracheal catheter 1 is communicated with a single-end of the three-way pipe 2, a double-end of the three-way pipe 2 is respectively communicated with the airway lumen catheter 3 and the sputum excretion lumen catheter 4, one end of the airway lumen catheter 3, which is far away from the three-way pipe 2, is communicated with a respirator, and the double-lumen tracheal cannula has the function of assisting sputum excretion by being provided with the three-way pipe 2, so that a severe patient using the respirator can conveniently perform sputum excretion in a closed manner and perform endotracheal sputum excretion under general conditions under the condition of positive pressure ventilation under the premise of continuously opening the pipeline, thereby realizing autonomous sputum excretion, and meanwhile, the three-way pipe 2 can play a certain limiting role through the structural characteristics thereof, avoid endotracheal tube 1 to insert too deeply in the trachea to avoid the unilateral lung to ventilate and the not ventilative situation of opposite side to take place, promote patient's use and experience, ensure safety.
As an optional implementation manner, one end of the sputum excretion cavity conduit 4, which is far away from the three-way pipe 2, is connected with a valve 41, and the valve 41 can adjust the cavity radius of the sputum excretion cavity conduit 4, so as to control the specific sputum excretion amount and flexibly adjust according to the actual use condition.
As an optional embodiment, the outlet end of the valve 41 is provided with a piston 42, the outlet end can be blocked by the piston 42, and after the piston 42 is removed, the valve 41 can be opened, so that the opening and closing of the valve 41 can be adjusted by the piston 42, and the use is more convenient and quick.
Alternatively, the outlet end of the valve 41 is detachably connected with a sputum suction tube or a closed sputum suction tube, and the sputum suction tube or the closed sputum suction tube can wash out viscous sputum.
As an optional embodiment, one end of the sputum discharging cavity catheter 4 far away from the three-way pipe 2 is connected with a sputum storage tank 43, and the sputum storage tank 43 can collect sputum discharged from the sputum discharging cavity catheter 4.
EXAMPLE five
The embodiment provides an autonomous sputum excretion type double-lumen tracheal cannula, which comprises a tracheal catheter 1, a three-way pipe 2, an airway lumen catheter 3 and a sputum excretion lumen catheter 4, wherein the tracheal catheter 1 is communicated with a single-end of the three-way pipe 2, a double-end of the three-way pipe 2 is respectively communicated with the airway lumen catheter 3 and the sputum excretion lumen catheter 4, one end of the airway lumen catheter 3, which is far away from the three-way pipe 2, is communicated with a respirator, and the double-lumen tracheal cannula has the function of assisting sputum excretion by being provided with the three-way pipe 2, so that a severe patient using the respirator can conveniently perform sputum excretion in a closed manner and perform endotracheal sputum excretion under general conditions under the condition of positive pressure ventilation under the premise of continuously opening the pipeline, thereby realizing autonomous sputum excretion, and meanwhile, the three-way pipe 2 can play a certain limiting role through the structural characteristics thereof, avoid endotracheal tube 1 to insert too deeply in the trachea to avoid the unilateral lung to ventilate and the not ventilative situation of opposite side to take place, promote patient's use and experience, ensure safety.
As an optional implementation manner, one end of the sputum excretion cavity conduit 4, which is far away from the three-way pipe 2, is connected with a valve 41, and the valve 41 can adjust the cavity radius of the sputum excretion cavity conduit 4, so as to control the specific sputum excretion amount and flexibly adjust according to the actual use condition.
As an optional embodiment, the outlet end of the valve 41 is provided with a piston 42, the outlet end can be blocked by the piston 42, and after the piston 42 is removed, the valve 41 can be opened, so that the opening and closing of the valve 41 can be adjusted by the piston 42, and the use is more convenient and quick.
Alternatively, the outlet end of the valve 41 is detachably connected with a sputum suction tube or a closed sputum suction tube, and the sputum suction tube or the closed sputum suction tube can wash out viscous sputum.
As an optional embodiment, one end of the sputum discharging cavity catheter 4 far away from the three-way pipe 2 is connected with a sputum storage tank 43, and the sputum storage tank 43 can collect sputum discharged from the sputum discharging cavity catheter 4.
As an optional embodiment, the tracheal catheter comprises an inflation cuff 51 and an inflation catheter 52, wherein the inflation cuff 51 is arranged on the outer wall of the tracheal catheter 1, the inflation cuff 51 is a balloon, the inflation cuff 51 is communicated with the inflation catheter 52, air can be injected into the inflation cuff 51 after the inflation catheter 52 is ventilated, until the pressure of the inflation cuff 51 is increased to 25cm to 30cm of water column, and the tracheal catheter 1 is fixed firmly.
EXAMPLE six
The embodiment provides an autonomous sputum excretion type double-lumen tracheal cannula, which comprises a tracheal catheter 1, a three-way pipe 2, an airway lumen catheter 3 and a sputum excretion lumen catheter 4, wherein the tracheal catheter 1 is communicated with a single-end of the three-way pipe 2, a double-end of the three-way pipe 2 is respectively communicated with the airway lumen catheter 3 and the sputum excretion lumen catheter 4, one end of the airway lumen catheter 3, which is far away from the three-way pipe 2, is communicated with a respirator, and the double-lumen tracheal cannula has the function of assisting sputum excretion by being provided with the three-way pipe 2, so that a severe patient using the respirator can conveniently perform sputum excretion in a closed manner and perform endotracheal sputum excretion under general conditions under the condition of positive pressure ventilation under the premise of continuously opening the pipeline, thereby realizing autonomous sputum excretion, and meanwhile, the three-way pipe 2 can play a certain limiting role through the structural characteristics thereof, avoid endotracheal tube 1 to insert too deeply in the trachea to avoid the unilateral lung to ventilate and the not ventilative situation of opposite side to take place, promote patient's use and experience, ensure safety.
As an optional implementation manner, one end of the sputum excretion cavity conduit 4, which is far away from the three-way pipe 2, is connected with a valve 41, and the valve 41 can adjust the cavity radius of the sputum excretion cavity conduit 4, so as to control the specific sputum excretion amount and flexibly adjust according to the actual use condition.
As an optional embodiment, the outlet end of the valve 41 is provided with a piston 42, the outlet end can be blocked by the piston 42, and after the piston 42 is removed, the valve 41 can be opened, so that the opening and closing of the valve 41 can be adjusted by the piston 42, and the use is more convenient and quick.
Alternatively, the outlet end of the valve 41 is detachably connected with a sputum suction tube or a closed sputum suction tube, and the sputum suction tube or the closed sputum suction tube can wash out viscous sputum.
As an optional embodiment, one end of the sputum discharging cavity catheter 4 far away from the three-way pipe 2 is connected with a sputum storage tank 43, and the sputum storage tank 43 can collect sputum discharged from the sputum discharging cavity catheter 4.
As an optional embodiment, the tracheal catheter comprises an inflation cuff 51 and an inflation catheter 52, wherein the inflation cuff 51 is arranged on the outer wall of the tracheal catheter 1, the inflation cuff 51 is a balloon, the inflation cuff 51 is communicated with the inflation catheter 52, air can be injected into the inflation cuff 51 after the inflation catheter 52 is ventilated, until the pressure of the inflation cuff 51 is increased to 25cm to 30cm of water column, and the tracheal catheter 1 is fixed firmly.
As an optional implementation mode, the shape of the three-way pipe 2 is a bevel Y-shaped or pant-type three-way pipe, meanwhile, the three-way pipe 2 is a constant-diameter or variable-diameter three-way pipe, the fluid resistance of the bevel Y-shaped or pant-type three-way pipe is smaller, and the three-way pipe 2 is smoother, and the connection between the three-way pipe 2 and the airway cavity conduit 3 and the sputum excretion cavity conduit 4 can be separately and independently manufactured with the inflation conduit 52 and can be directly connected with the tracheotomy tube to complete the functions of ventilation and sputum excretion.
The self-phlegm-discharging double-cavity tracheal intubation specifically comprises the following steps:
firstly, the airway cavity catheter 3 is connected with a respirator: after anaesthetizing the patient, the operator holds the laryngoscope handle with the left hand, the laryngoscope blade guides the right side of the tongue surface of the patient to slide into the epiglottis valley, the left hand lifts the laryngoscope blade horizontally to expose the glottis, the right hand holds the self-sputum-discharging type double-cavity tracheal catheter, one end with the inflatable cuff 51 slides in along the glottis side, the vocal cord line is flush with the vocal cord, the injector is used for injecting air to the inflatable port of the inflatable catheter 52, the pressure of the inflatable cuff 51 is increased to 25cm to 30cm water column, the outlet of the airway cavity catheter 3 and the outlet of the sputum discharging cavity catheter 4 are blocked and sealed, and the respirator pipeline is connected.
And secondly, a sputum discharging operation step, namely when the sputum in the air passage is found to be more, the respirator is not disconnected, the piston 42 at the outlet end of the sputum discharging cavity conduit 4 is only required to be opened, the expiratory airflow is visible to be leaked, the valve 41 is adjusted at the moment, the air leakage of the sputum discharging cavity conduit 4 is in the alarm range of the respirator, the sputum is visible to be discharged to the air outlet port along the sputum discharging cavity conduit 4 along with the airflow, and the sputum can be collected by using a sputum suction pipe, a closed sputum suction pipe or a sputum storage tank 43 at the moment.
Thirdly, the autonomous sputum excretion type double-lumen endotracheal tube mentioned in this embodiment may be connected to a tracheotomy tube, the airway lumen tube 3 is connected to a ventilator for positive pressure ventilation, and the above sputum excretion steps are repeated.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides an independently phlegm discharging type two-chamber trachea cannula which characterized in that, includes endotracheal tube (1), three-way pipe (2), air flue chamber pipe (3) and phlegm discharging chamber pipe (4), wherein: the tracheal catheter (1) is communicated with a single end of the three-way pipe (2), the double end of the three-way pipe (2) is respectively communicated with the airway cavity catheter (3) and the sputum excretion cavity catheter (4), and one end of the airway cavity catheter (3) far away from the three-way pipe (2) is communicated with a respirator.
2. The autonomous expectorant dual-lumen endotracheal tube according to claim 1, characterized in that: one end, far away from the three-way pipe (2), of the sputum excretion cavity catheter (4) is connected with a valve (41), and the valve (41) can adjust the cavity radius of the sputum excretion cavity catheter (4).
3. The autonomous expectorant dual-lumen endotracheal tube according to claim 2, characterized in that: the outlet end of the valve (41) is provided with a piston (42), and the piston (42) can block the outlet end.
4. The autonomous expectorant dual-lumen endotracheal tube according to claim 2, characterized in that: the outlet end of the valve (41) is detachably connected with a sputum suction pipe or a closed sputum suction pipe, and the sputum suction pipe or the closed sputum suction pipe can wash out viscous sputum.
5. The autonomous expectorant dual-lumen endotracheal tube according to claim 1, characterized in that: one end, far away from the three-way pipe (2), of the sputum discharging cavity catheter (4) is connected with a sputum storage tank (43), and the sputum storage tank (43) can collect sputum discharged from the sputum discharging cavity catheter (4).
6. The autonomous expectorant dual-lumen endotracheal tube according to claim 1, characterized in that: the tracheal catheter further comprises an inflation cuff (51) and an inflation catheter (52), wherein the inflation cuff (51) is arranged on the outer wall of the tracheal catheter (1), and the inflation cuff (51) is communicated with the inflation catheter (52).
7. The autonomous expectorant dual-lumen endotracheal tube according to claim 1, characterized in that: the three-way pipe (2) is in a bevel Y shape.
8. The autonomous expectorant dual-lumen endotracheal tube according to claim 1, characterized in that: the three-way pipe (2) is in the shape of a pants.
9. The autonomous expectorant dual-lumen endotracheal tube according to claim 1, characterized in that: the three-way pipe (2) is a three-way pipe with equal diameter.
10. The autonomous expectorant dual-lumen endotracheal tube according to claim 1, characterized in that: the three-way pipe (2) is a reducing three-way pipe.
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| CN202121785198.0U CN215961645U (en) | 2021-08-02 | 2021-08-02 | Autonomous sputum excretion type double-cavity trachea cannula |
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| CN202121785198.0U CN215961645U (en) | 2021-08-02 | 2021-08-02 | Autonomous sputum excretion type double-cavity trachea cannula |
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Effective date of registration: 20220926 Address after: 10 Tieyi Road, Yangfangdian, Haidian District, Beijing Patentee after: BEIJING SHIJITAN HOSPITAL, CMU Patentee after: BEIJING AEROSPACE CHANGFENG Co.,Ltd. Address before: 10 Tieyi Road, Yangfangdian, Haidian District, Beijing Patentee before: BEIJING SHIJITAN HOSPITAL, CMU |
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