CN108478912B - Novel double-balloon zipper type tracheal intubation catheter - Google Patents
Novel double-balloon zipper type tracheal intubation catheter Download PDFInfo
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- CN108478912B CN108478912B CN201810379631.7A CN201810379631A CN108478912B CN 108478912 B CN108478912 B CN 108478912B CN 201810379631 A CN201810379631 A CN 201810379631A CN 108478912 B CN108478912 B CN 108478912B
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- 238000002627 tracheal intubation Methods 0.000 title claims abstract description 42
- 210000000621 bronchi Anatomy 0.000 claims abstract description 25
- 210000003437 trachea Anatomy 0.000 claims abstract description 16
- 210000005077 saccule Anatomy 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 8
- 210000004072 lung Anatomy 0.000 claims description 6
- 230000003872 anastomosis Effects 0.000 claims description 2
- 208000032843 Hemorrhage Diseases 0.000 abstract description 12
- 230000017531 blood circulation Effects 0.000 abstract description 2
- 239000008280 blood Substances 0.000 description 10
- 210000004369 blood Anatomy 0.000 description 10
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 208000034158 bleeding Diseases 0.000 description 5
- 230000000740 bleeding effect Effects 0.000 description 5
- 238000013276 bronchoscopy Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000002685 pulmonary effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 206010003497 Asphyxia Diseases 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 238000010606 normalization Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 1
- 208000019693 Lung disease Diseases 0.000 description 1
- 210000003484 anatomy Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000004696 endometrium Anatomy 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000023597 hemostasis Effects 0.000 description 1
- 230000007954 hypoxia Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000010197 meta-analysis Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 201000003144 pneumothorax Diseases 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 208000023504 respiratory system disease Diseases 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
- 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
- A61M16/0465—Tracheostomy tubes; Devices for performing a tracheostomy; Accessories therefor, e.g. masks, filters
-
- 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
- A61M16/0475—Tracheal tubes having openings in the tube
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- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- Emergency Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The patent discloses a novel double-balloon zipper type trachea cannula catheter, which comprises a cannula catheter, wherein the cannula catheter is provided with an open loop structure, and the open loop structure is opened and closed through a zipper; the intubation catheter is characterized in that the intubation catheter is also provided with two balloons, namely an upper balloon and a lower balloon, and is also provided with an upper balloon inflation connecting pipe and a lower balloon inflation connecting pipe which are respectively inflated with the upper balloon and the lower balloon, the placement position of the upper balloon corresponds to the part of the human trachea, and the placement position of the lower balloon corresponds to the part of the human main bronchus. Compared with the prior art, the intubation catheter provided by the patent has the characteristics of open loop, zipper, double saccule, lengthening and the like, can meet the requirement that the intubation operation can be performed without exiting the airway when the bronchoscope operation generates massive hemorrhage, and simultaneously has the function of preventing the blood flow of the affected side from being healed when the massive hemorrhage occurs.
Description
Technical Field
The invention relates to the field of medical equipment, in particular to a novel double-balloon zipper type tracheal cannula catheter.
Background
Bronchoscopy is one of important diagnosis and treatment means of respiratory diseases, and provides great help for diagnosis and treatment of pulmonary diseases. The operation belongs to invasive operation of respiratory tract, has a certain risk, and can cause complications during the operation, including pneumothorax, hemorrhage, hypoxia, etc. Along with the improvement of medical level, the normalization of bronchoscope operation training and the normalization of operation technical flow in China, the complication occurrence rate in operation is also reduced year by year, and meanwhile, the contraindication range of bronchoscope operation is also gradually narrowed. Thus, bronchoscopy is generally safe.
However, complications during bronchoscopy procedures are also unavoidable. According to European Clinical Respiratory Journal, a meta analysis of 94 bronchoscopies or complications during treatment reveals that the incidence of bleeding complications varies from 2.5% to 89.9% in the study involved. Although bleeding complications are affected by the skill of the operator, the extent of patient lesions, etc., it is not advisable that bleeding be a common complication during bronchoscopy or treatment. Major bleeding is one of the most critical and fatal complications, and if not treated timely or improperly, can cause suffocation of patients, thus endangering life. At this time, hemostasis and tracheal intubation of a patient in the examination process, maintaining the airway unobstructed and maintaining the blood oxygen partial pressure are primary tasks for rescuing.
However, the current endotracheal intubation catheter still has the following problems for the critical life's major bleeding that occurs in the operation process of the rescue bronchoscope: (1) The tracheal intubation catheter is a complete circular ring, the tracheal intubation operation can be performed after the bronchoscope exits from the back of the airway, but when the bronchoscope exits from the airway, a large amount of blood gushes out often obscures key anatomical structures of the airway and obscures the visual field of an operator under the scope, so that the tracheal intubation operation is more difficult; (2) The conventional trachea cannula catheter is only a single saccule, the common model length of an adult is only 250-350mm, the left and right main bronchi cannot be reached yet, even if the trachea cannula operation is successfully implemented on a patient, the blood can not be prevented from rushing from the affected side to the healthy side, and further reduction of the pulmonary ventilation, pulmonary ventilation and blood oxygen exchange of the patient is difficult to prevent, so that the suffocation risk is caused.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a novel double-balloon zipper type tracheal intubation catheter, which can meet the requirement that the intubation operation can be performed without exiting an airway when the bronchoscope operation generates massive hemorrhage, and has the beneficial effect of preventing the blood of the affected side from flowing to the healthy side when the massive hemorrhage occurs.
In order to achieve the purpose of the invention, the following technical scheme is adopted:
the novel double-balloon zipper type trachea cannula catheter comprises a cannula catheter, wherein the cannula catheter is provided with an open loop structure, and the open loop structure is opened and closed through a zipper; the intubation catheter is characterized in that the intubation catheter is also provided with two balloons, namely an upper balloon and a lower balloon, and is also provided with an upper balloon inflation connecting pipe and a lower balloon inflation connecting pipe which are respectively inflated with the upper balloon and the lower balloon, the placement position of the upper balloon corresponds to the part of the human trachea, and the placement position of the lower balloon corresponds to the part of the human main bronchus.
The intubate pipe that this patent provided is equipped with open-loop structure, can satisfy the bronchoscope under the condition that does not withdraw from the air flue, and the ring embolias in the bronchofiberscope hose, can accomplish the trachea intubate fast under the guidance of bronchoscope. The open loop structure realizes open loop and closure through zipper opening and closing, and can complete the catheter closing process more rapidly in emergency. The intubation catheter is provided with the double saccule, and the position of the lower saccule is prolonged to the position of the main bronchus of the human body, so that the intubation catheter can enter the main bronchus of the healthy side lung under the guidance of the bronchoscope and is closed, and the blood of the affected side is prevented from flowing to the healthy side. Therefore, the utility model can meet the requirement of the operation of intubation without exiting the airway when the bronchoscope operation generates massive hemorrhage, and has the beneficial effect of preventing the blood flow of the affected side from flowing to the healthy side when the massive hemorrhage occurs.
Further, the left side and the right side of the zipper are respectively provided with a concave structure and a convex structure, and the zipper is closed by embedding the concave structure and the convex structure.
Because the left and right sides of the zipper are embedded through the concave-convex structures, the zipper can be closed as long as the concave-convex structures on the left and right sides of the zipper are embedded with each other, the starting position of the zipper closure can be changed, and the cannula guide pipe closure can be completed without absolute alignment.
Further, the zipper is provided with a zipper fastener, the left side and the right side of the zipper are embedded in the zipper fastener, and the zipper fastener realizes the embedding of concave and convex structures of the zipper by sliding on the zipper.
In this patent, the zip fastener adopts concave, the protruding structure gomphosis of left and right both sides to realize the zip fastener closure, is equipped with the zip fastener button correspondingly on the zip fastener, and the zip fastener button gomphosis is on the zip fastener to slide on the zip fastener, thereby realize the gomphosis of the concave, protruding structure of zip fastener, make intubate pipe closure form a cyclic annular structure.
Further, the inflated volume of the upper balloon is larger than the inflated volume of the lower balloon.
The upper balloon corresponds to the tracheal part of the human body during operation, and the lower balloon corresponds to the main tracheal part of the human body, so that the upper balloon is slightly larger than the lower balloon during inflation, and the size difference of the upper balloon and the lower balloon is similar to the size difference of the trachea of the human body and the main bronchus.
Further, the length of the tube body of the intubation catheter can at least reach the main bronchus at one side of the lung, and the inner diameter of the tube body part of the intubation catheter entering the main bronchus part of the human body is smaller than the inner diameter of the tube entering the trachea part of the human body.
The length of the tube body of the intubation tube is lengthened, so that the intubation tube can enter the main bronchus of the healthy side lung under the guidance of a bronchoscope, and the blockage is carried out, and the blood of the affected side is prevented from flowing to the healthy side. Because the inner diameter of the tube body part of the intubation tube entering the main bronchus part of the human body is smaller, namely the inner diameter of the tube at the lower half part of the intubation tube is smaller than that of the tube at the upper half part, the balloon can easily reach the main bronchus part of the healthy side of the human body during operation.
Further, the double saccule is enclosed outside the open-loop structure when the open-loop structure is closed, and a convex edge is arranged outside the zipper anastomosis part of the open-loop structure.
When the open-loop structure is closed by the zipper, the convex edge protrudes out of the anastomotic site of the open-loop structure, and the convex edge can effectively prevent the hard part of the anastomotic site of the zipper from damaging the inner membrane of a patient.
Further, an adhesive material is arranged on the inner side of the convex edge, and the convex edge is adhered to the open-loop structure through the adhesive material, so that the open-loop structure forms a closed circular ring structure.
The inner side of the protruding edge is provided with the adhesive material, so that the protruding edge is adhered to the outer side of the matched part of the zipper after the zipper is closed, the air tightness of the cannula after the catheter is closed is increased to a certain extent, and blood is effectively prevented from flowing from the affected side to the healthy side.
Further, the convex edge is arranged on the double balloon of the cannula pipeline, and is realized by arranging a bulging structure on the double balloon.
Compared with the prior art, the invention has the following beneficial effects:
(1) The intubation tube is of an open loop structure, so that the bronchoscope is allowed to be sleeved into the bronchoscope hose under the condition that the bronchoscope does not exit from the airway, and the tracheal intubation can be completed rapidly under the guidance of the bronchoscope.
(2) The catheter tube is provided with a special zipper structure, so that the closing process of the catheter tube can be completed more rapidly in emergency.
(3) The intubation tube is provided with a double-balloon structure, the tube body of the intubation tube is lengthened to the main pulmonary bronchus part of the human body, the intubation tube is allowed to enter the main pulmonary bronchus of the healthy side under the guidance of the bronchoscope, and the blockage is carried out, so that the blood of the affected side is prevented from flowing to the healthy side.
(4) The cannula catheter is provided with the protruding edge for the outside in the closure of open-loop structure, protruding edge is realized through design expansion structure on two sacculus, after accomplishing cannula catheter closure, protruding edge can bond with zip fastener concave-convex structure gomphosis position, increases the gas tightness in breathing in after cannula catheter closure to a certain extent, effectively prevents blood from suffering from sidestream to healthy side.
(5) Through setting up protruding edge, can prevent to a certain extent that the anastomotic stereoplasm part of zip fastener from damaging patient's trachea endometrium.
(6) By providing the lower tube half of the cannula catheter with a smaller tube inner diameter than the upper tube half, the lower balloon is made easier to reach the main lateral bronchus.
(7) Through setting up the zip fastener for the concave-convex structure gomphosis's of left and right sides structure for the zip fastener starting point is convertible, and the intubate pipe closure can be accomplished to the zip fastener left and right sides need not absolute alignment.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present patent.
FIG. 2 is a schematic cross-sectional view of the open-loop structural portion of the present patent with the zipper not closed, with the flanges not bonded, and with the zipper closed and flanges bonded.
FIG. 3 is a schematic cross-sectional view of the open loop structure of the present patent after partially embedding the zipper fastener and after closing the zipper.
FIG. 4 is an enlarged cross-sectional view of the zipper fastener of the present patent after the zipper fastener is inserted and the engagement portion is closed.
Fig. 5 is a schematic view of the left side of the zipper fastener of the present patent.
Fig. 6 is a schematic view of the right side of the zipper fastener of the present patent.
Fig. 7 is a perspective view of the fastener of the present patent.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
Examples
As shown in fig. 1, the novel double-balloon zipper type trachea cannula catheter comprises a cannula catheter, wherein the cannula catheter is provided with an open loop structure, and the open loop structure is opened and closed through a zipper 6; the intubation catheter is also provided with a double balloon, namely an upper balloon 1 and a lower balloon 2, and is also provided with an upper balloon inflation connecting pipe 3 and a lower balloon inflation connecting pipe 4 which are respectively inflated with the upper balloon 1 and the lower balloon 2, the placement position of the upper balloon 1 corresponds to the part of the human trachea, and the placement position of the lower balloon 2 corresponds to the part of the human main bronchus. The volume of the inflated upper balloon 1 is larger than that of the inflated lower balloon 2, and the size ratio of the inflated upper balloon 1 to the inflated lower balloon 2 is equal to that of the human trachea and the main bronchus. The tube body of the intubation tube is lengthened, so that the length of the intubation tube can reach the main bronchus part of one side lung, the inner diameter of the tube body of the intubation tube entering the main bronchus part is smaller than the inner diameter of the tube body of the intubation tube entering the trachea part, the size proportion of the inner diameter of the tube body is equal to the size proportion of the main bronchus and the common trachea of a human body, the tube body of the intubation tube entering the main bronchus part is smaller, and the lower half part of the tube body is easier to enter the main bronchus of one side lung because the inner diameter of the tube entering the main bronchus part is firstly inserted into the human body.
As shown in fig. 2, 3 and 4, the left and right sides of the zipper 6 are respectively provided with a concave and convex structure a, the zipper is closed by the jogged concave and convex structure a, and the convex and convex structure a is arranged on the left and right sides of the zipper 6 through guide rail grooves 610 arranged on the left and right sides of the zipper 6.
As shown in fig. 5, 6 and 7, the zipper 6 is provided with a zipper fastener 5, the left and right sides of the zipper 6 are embedded in the zipper fastener 5, and the zipper fastener 5 realizes the embedding of the concave and convex structures of the zipper 6 by sliding on the zipper 6. After the concave-convex structures on the left side and the right side of the zipper are embedded through the zipper buttons, the occupied space is narrowed to be half of the original space, and a structural basis is provided for the two zippers to be embedded at the tail parts.
Referring to fig. 6 and 7, the zipper fastener 5 includes a zipper groove 51, an upper rail 52 and a lower rail 53, the upper rail 52 and the lower rail 53 are embedded into a zipper rail groove 610, and limit the movable range of the zipper 6, and after the zipper fastener 5 is fastened, the space of the protruding and protruding structure a of the zipper 6 is narrowed to half of the original space, so as to provide a structural foundation for the protruding and protruding structure a to complete the embedding at the tail.
As shown in fig. 2 and 3, the double-balloon surrounds the outer side of the open-loop structure when the open-loop structure is closed, and a convex edge 7 is arranged on the outer side of the anastomotic part of the zipper 6 of the open-loop structure. The inner side of the convex edge 7 is provided with an adhesive material, and the convex edge 7 is adhered to the open-loop structure through the adhesive material, so that the open-loop structure forms a closed circular ring structure. The convex edge 7 is arranged on the double saccule of the intubation tube and is realized by arranging a bulging structure on the double saccule.
In the embodiment, the conversion of the cannula guide pipe from the open-loop state to the closed-loop state can be realized through the jogged between the concave structure and the convex structure of the zipper 6. The balloon is inflated and enclosed on the outer side of the zipper 6 after being closed, one end of the balloon is provided with an inflated structure, namely a convex edge 7, and the inner side of the convex edge 7 is provided with an adhesive material, so that the balloon can be adhered on the outer side of the zipper embedded part after being embedded, and the sealing of the balloon is realized under the closed state of the circular ring, and the air tightness of the balloon is increased.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (4)
1. The novel double-balloon zipper type tracheal intubation catheter is characterized by comprising an intubation catheter, wherein the intubation catheter is provided with an open loop structure, the open loop structure is opened and closed through zipper opening and closing, the intubation catheter is also provided with double balloons, namely an upper balloon and a lower balloon, the intubation catheter is also provided with an upper balloon inflation connecting pipe and a lower balloon inflation connecting pipe which are respectively corresponding to the inflation of the upper balloon and the lower balloon, the placement position of the upper balloon corresponds to the part of a human trachea, and the placement position of the lower balloon corresponds to the part of a human main bronchus; the left side and the right side of the zipper are respectively provided with a concave structure and a convex structure, and the zipper is closed by embedding the concave structure and the convex structure; the double saccule is enclosed outside the open-loop structure when the open-loop structure is closed, and a convex edge is arranged outside the zipper anastomosis part of the open-loop structure; the convex edge is arranged on the double saccule of the intubation tube and is realized by arranging the bulging structure on the double saccule, the inner side of the convex edge is provided with the bonding material, and the convex edge is bonded on the open-loop structure through the bonding material, so that the open-loop structure forms a closed circular ring structure.
2. The novel double-balloon zipper type tracheal cannula catheter according to claim 1, wherein a zipper fastener is arranged on the zipper, the left side and the right side of the zipper are embedded in the zipper fastener, and the zipper fastener realizes the embedding of a concave structure and a convex structure of the zipper by sliding on the zipper.
3. The novel double-balloon zipper-type endotracheal tube according to claim 1, wherein the inflated volume of the upper balloon is greater than the inflated volume of the lower balloon.
4. The novel double-balloon zipper type tracheal cannula catheter according to claim 1, wherein the length of the tube body of the cannula catheter at least can reach the main bronchus at one side of the lung, and the inner diameter of the tube body part of the cannula catheter entering the main bronchus part of the human body is smaller than the inner diameter of the tube entering the tracheal part of the human body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810379631.7A CN108478912B (en) | 2018-04-25 | 2018-04-25 | Novel double-balloon zipper type tracheal intubation catheter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810379631.7A CN108478912B (en) | 2018-04-25 | 2018-04-25 | Novel double-balloon zipper type tracheal intubation catheter |
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| CN108478912A CN108478912A (en) | 2018-09-04 |
| CN108478912B true CN108478912B (en) | 2024-01-26 |
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| CN111166395A (en) * | 2020-02-17 | 2020-05-19 | 广州市妇女儿童医疗中心（广州市妇幼保健院、广州市儿童医院、广州市妇婴医院、广州市妇幼保健计划生育服务中心） | Double-balloon device for fetal diaphragmatic hernia airway embolism operation |
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| CN204364001U (en) * | 2014-12-31 | 2015-06-03 | 广州医科大学附属第一医院 | A kind of muscle strength test glove |
| JP2016123783A (en) * | 2015-01-07 | 2016-07-11 | 株式会社デサント | Stretchable sport wear and slide fastener |
| DE102015014420A1 (en) * | 2015-11-07 | 2017-05-11 | Hille Kisch-Wedel | Improved procedure for oral bronchoscopic intubation via the single-sided laryngeal mask |
| CN206526158U (en) * | 2016-07-29 | 2017-09-29 | 广州医科大学附属第一医院 | A kind of anti-tube drawing gloves |
| CN106620983A (en) * | 2017-02-10 | 2017-05-10 | 上海市肺科医院 | Multifunctional double-lumen tube intubation tube beneficial to airway management in perioperative period |
| CN106964047A (en) * | 2017-05-02 | 2017-07-21 | 廖信芳 | A kind of single-lumen bronchial tube of single, double lung switching ventilation |
| DE202017003068U1 (en) * | 2017-06-09 | 2017-08-11 | Ulrich Vorwerk | Tracheostomy cannula with low pressure cuff and suction device |
| CN208852191U (en) * | 2018-04-25 | 2019-05-14 | 广州医科大学附属第一医院 | A kind of novel double-ball capsule zipper form trachea cannula conduit |
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| CN108478912A (en) | 2018-09-04 |
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