CN111803019B - Pneumoperitoneum-free single-port laparoscope and choledochoscope protective sheath and application thereof - Google Patents
Pneumoperitoneum-free single-port laparoscope and choledochoscope protective sheath and application thereof Download PDFInfo
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- CN111803019B CN111803019B CN202010779866.2A CN202010779866A CN111803019B CN 111803019 B CN111803019 B CN 111803019B CN 202010779866 A CN202010779866 A CN 202010779866A CN 111803019 B CN111803019 B CN 111803019B
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- 208000005646 Pneumoperitoneum Diseases 0.000 title claims abstract description 24
- 230000001681 protective effect Effects 0.000 title claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 22
- 239000007924 injection Substances 0.000 claims abstract description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000011347 resin Substances 0.000 claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 11
- 239000000741 silica gel Substances 0.000 claims abstract description 11
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000002192 cholecystectomy Methods 0.000 abstract description 12
- 210000003445 biliary tract Anatomy 0.000 abstract description 2
- 238000002504 lithotomy Methods 0.000 abstract 1
- 210000000232 gallbladder Anatomy 0.000 description 17
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 239000001569 carbon dioxide Substances 0.000 description 5
- 210000001015 abdomen Anatomy 0.000 description 4
- 210000000683 abdominal cavity Anatomy 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000004575 stone Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 206010049704 Gallbladder polyp Diseases 0.000 description 2
- 230000003187 abdominal effect Effects 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 201000001883 cholelithiasis Diseases 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 208000013976 polyp of gallbladder Diseases 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 208000010444 Acidosis Diseases 0.000 description 1
- 206010001526 Air embolism Diseases 0.000 description 1
- 206010002091 Anaesthesia Diseases 0.000 description 1
- 208000037062 Polyps Diseases 0.000 description 1
- 210000003815 abdominal wall Anatomy 0.000 description 1
- 230000007950 acidosis Effects 0.000 description 1
- 208000026545 acidosis disease Diseases 0.000 description 1
- 230000037005 anaesthesia Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 210000004303 peritoneum Anatomy 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
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- 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
- A61B1/313—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 introducing through surgical openings, e.g. laparoscopes
- A61B1/3132—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 introducing through surgical openings, e.g. laparoscopes for laparoscopy
-
- 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
- A61B1/012—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 characterised by internal passages or accessories therefor
- A61B1/015—Control of fluid supply or evacuation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00292—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
- A61B2017/00296—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means mounted on an endoscope
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Molecular Biology (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Physics & Mathematics (AREA)
- Biophysics (AREA)
- Radiology & Medical Imaging (AREA)
- Pathology (AREA)
- Optics & Photonics (AREA)
- Endoscopes (AREA)
Abstract
The invention provides a pneumoperitoneum-free single-port laparoscope and choledochoscope protective sheath tube and application thereof, wherein the pneumoperitoneum-free single-port laparoscope and choledochoscope protective sheath tube comprises a head tube section, a body tube section and a tail tube section; the pipe wall of the head pipe section is provided with a channel I, the pipe wall is made of two layers of soft silica gel or resin materials, annular and radial joint surfaces are arranged between the two layers of soft silica gel or resin materials to form crisscrossed channels, the head pipe section is in a round table shape in the working state, the pipe wall of the head pipe section in the non-working state is folded back and forth in a fan shape in the circumferential direction, the joint between the two adjacent folded surfaces forms a corner, the corners of the inner ring and the outer ring are mutually bonded, and the outer ring is in a cylinder shape; the joint of the head pipe section and the body pipe section is provided with an air injection hole; a channel II and a channel III are arranged in the body pipe section; a channel IV and a channel V are arranged in the tail pipe section, the channel V is communicated with an air injection connector, and the air injection connector is connected with an injector. The invention can realize cholecystectomy under laparoscope and biliary tract lithotomy, lithotripsy, polypectomy and other gallbladder-protecting operations.
Description
Technical Field
The invention relates to the technical field of minimally invasive medical technology and surgical instruments, in particular to an pneumoperitoneum-free single-port laparoscope and choledochoscope protective sheath tube and application thereof.
Background
Gall bladder stones and gall bladder polyps are common clinical diseases, and along with the development of instruments and operation technology and the importance of the beautifying effect of an abdominal incision, the way of the gall bladder stones and gall bladder polyps is gradually changed from an open-abdomen cholecystectomy to a three-hole laparoscope cholecystectomy, so that the current single-hole laparoscope cholecystectomy is realized. At present, most of pneumoperitoneum laparoscopic cholecystectomy is performed, carbon dioxide gas is injected into the abdominal cavity to fill the abdominal cavity, so that a clear view under the laparoscope and an operation bow for operating surgical instruments are formed, but the pneumoperitoneum laparoscopic cholecystectomy has the following defects: 1. pneumoperitoneum can cause upward movement of diaphragm, influence respiration of patients, and increase anesthesia risk and difficulty; 2. a large amount of carbon dioxide is absorbed into blood to form acidosis; 3. carbon dioxide enters the blood through the damaged great vein and can be used for gas embolism, thereby endangering the life of patients. In order to avoid the defects, pneumoperitoneum-free laparoscopic cholecystectomy has been clinically developed, including suspension methods and pneumoperitoneum-free laparoscopic punch-through applications, wherein the suspension methods have serious damage to abdominal wall musculature and are gradually eliminated clinically.
With the improvement of organ protection consciousness, the gallbladder protection operation appears in the last decade, and the operation mode gradually changes from the traditional right upper abdomen small incision gallbladder operation to the current complete laparoscope gallbladder protection operation after the laparoscope assisted right upper abdomen small incision gallbladder protection operation. Three-hole or double-hole channels are adopted in the complete laparoscopic gallbladder-protecting operation, the laparoscope enters the abdominal cavity through the navel stabbing cavity channel, and the choledochoscope enters through the right upper abdomen stabbing channel. Under the direct vision of the laparoscope, the operator holds the endoscope left hand, and makes the choledochoscope enter the gall bladder at the shortest distance by adjusting the direction of the right upper abdomen poking clamp, and the right hand operates accessories such as a stone-taking basket and the like to perform operations such as stone taking, polyp excision, roo-Abdominal sinus incision and the like.
With the increasing requirements of people on minimally invasive techniques, single-port laparoscopic techniques are increasingly applied to clinics, wherein single-port laparoscopic cholecystectomy is most widely developed, but single-port laparoscopic gallbladder-preserving operations are more slowly developed. Mainly because the navel incision is far away from the gall bladder, and the choledochoscope is a soft scope, the scope body lacks support in the process of being put into through the navel channel, so that the time for the choledochoscope to enter the gall bladder is long, the field of view of the choledochoscope is difficult to fix in the gall bladder, and therefore, the observation and treatment of the choledochoscope are difficult.
Disclosure of Invention
According to the single-hole laparoscope gallbladder-protecting operation, as the distance between the navel incision and the gallbladder is far, and the choledochoscope is a soft scope, the scope body lacks support in the process of being placed through the navel channel, so that the time for the choledochoscope to enter the gallbladder is long, the field of view of the choledochoscope is difficult to fix in the gallbladder, and therefore, the technical problems that the observation and treatment of the choledochoscope are difficult are solved, and the pneumoperitoneum-free single-hole laparoscope, the choledochoscope protecting sheath tube and the application thereof are provided. The invention mainly places gas or water into the head pipe section, the head end of the head pipe section can form a conical structure, carbon dioxide injection is not needed, and pneumoperitoneum-free cholecyst operation is realized.
The invention adopts the following technical means:
An pneumoperitoneum-free single port laparoscope and choledochoscope protective sheath comprising: a head pipe section, a body pipe section and a tail pipe section which are communicated in sequence;
The head pipe section is a single-channel pipe, a channel I is arranged in the head pipe section, the pipe wall of the head pipe section is made of two layers of soft silica gel or resin materials, annular and radial joint surfaces are arranged between the two layers of soft silica gel or resin materials to form criss-cross cavity passages, the head pipe section is in a round table shape in the working state, the pipe wall of the head pipe section in the non-working state is folded back and forth in a fan shape in the circumferential direction, the joint between the two adjacent folded surfaces forms a corner, the corners of the inner ring and the outer ring are mutually bonded, and the outer ring is in a cylindrical shape;
The joint of the head pipe section and the body pipe section is provided with an air injection hole, after air is injected through the air injection hole, the pressure of the inner cavity of the pipe wall of the head pipe section is increased, the joint at the inner and outer corners of the pipe wall is gradually torn, and finally, the joint is filled to form a truncated cone-shaped structure, and the appearance of the joint is of a conical structure;
the body pipe section is a double-channel pipe and is a hard resin or silica gel hose, a channel II and a channel III are arranged in the body pipe section, the channel II is communicated with the channel I, and the channel III is communicated with the gas injection hole;
The tail pipe section is a double-channel hard plastic pipe, a channel IV and a channel V are arranged in the tail pipe section, the channel IV is communicated with the channel II, one end of the channel V is communicated with the channel III, the other end of the channel V is communicated with an air injection connector on the pipe wall of the tail pipe section, and an injector is connected to the air injection connector.
Further, the sheath tube has an outer diameter of 10-30mm, an inner diameter of 8-25mm and a length of 60-80cm.
Further, in the working state, the diameter of the conical head end of the head pipe section is 4-10cm.
The pneumoperitoneum-free single-port laparoscope and the choledochoscope protective sheath can be applied to choledochoscopes, laparoscopes, duodenoscopes and the like, and can be used as an endoscope, and the application range is wide.
Compared with the prior art, the invention has the following advantages:
1. According to the pneumoperitoneum-free single-port laparoscope and choledochoscope protective sheath and the application thereof, gas or water is filled into the head pipe section, the head end of the pneumoperitoneum-free single-port laparoscope and choledochoscope protective sheath can form a conical structure, carbon dioxide is not required to be injected, and pneumoperitoneum-free cholecystectomy is realized.
2. The pneumoperitoneum-free single-port laparoscope and choledochoscope protective sheath tube and the application thereof provided by the invention can realize cholecystectomy under the laparoscope and biliary tract operation such as choledochoscope stone removal, lithotripsy, polypectomy and the like.
In summary, the technical scheme of the invention can solve the problems that in the single-port laparoscope gallbladder-protecting operation in the prior art, because the distance between the navel incision and the gallbladder is long, and the choledochoscope is a soft scope, the time for entering the gallbladder is long due to the lack of support of the scope body in the process of being placed through the navel channel, and the view of the choledochoscope is difficult to fix in the gallbladder, so that the observation and treatment of the choledochoscope are difficult.
Based on the reasons, the invention can be widely popularized in the fields of minimally invasive medical technology, surgical instruments and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic view of a joint prior to placement according to the present invention.
FIG. 2 is a schematic view of the structure of the folded pipe wall of the head pipe section of the present invention.
FIG. 3 is a schematic view of the structure of the head section air column in the working state of the present invention.
FIG. 4 is a schematic illustration of the invention in an operational state after tearing the connection point of the outer wall of the head pipe section.
In the figure: 1. a head section; 11. a channel I; 2. a body section; 21. channel II; 22. channel III; 3. a tail pipe section; 31. a channel IV; 32. a channel V; 4. an air injection connector; 5. an air injection hole; 6. a syringe; 7. the joint.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As shown in fig. 1 to 4, the present invention provides a pneumoperitoneum-free single port laparoscope and choledochoscope protecting sheath, comprising: the head pipe section 1, the body pipe section 2 and the tail pipe section 3 are communicated from top to bottom in sequence. Wherein the sheath tube has an outer diameter of 10-30mm, an inner diameter of 8-25mm and a length of 60-80cm.
The head pipe section 1 is a single-channel pipe, a channel I11 is arranged in the single-channel pipe, the pipe wall of the single-channel pipe is made of two layers of soft silica gel or resin materials, annular and radial joint surfaces are arranged between the two layers of soft silica gel or resin materials to form criss-cross cavity channels, the head pipe section 1 is in a round table shape in a working state, as shown in fig. 3, in the head pipe section 1, double-layer films are internally and longitudinally staggered air columns, the solid line is a joint 7, and the air columns are formed between the joints 7. The pipe wall of the head pipe section 1 in the non-working state is folded back and forth in a sector shape in the circumferential direction, the joint between two adjacent folded surfaces forms a corner, the corners of the inner ring and the outer ring are adhered to each other, and the outer ring is cylindrical as shown in fig. 1 and 2.
The joint of the head pipe section 1 and the body pipe section 2 is provided with an air injection hole 5, after air is injected into the air injection hole 5, the pressure of the inner cavity of the pipe wall of the head pipe section 1 is increased, the joint at the inner and outer corners of the pipe wall is gradually torn, and finally, the joint is filled to form a truncated cone-shaped structure, and the appearance is of a conical structure, as shown in fig. 4. Under the working state, the pipe wall of the head pipe section 1 is filled to form a conical structure, and the diameter of the conical head end of the conical structure is 4-10cm, namely the maximum diameter of the top of the conical structure.
The body section 2 is a double-channel pipe, is a hard resin or silica gel hose, and is internally provided with a channel II21 and a channel III22, wherein the channel II21 is communicated with the channel I11, and the channel III22 is communicated with the gas injection hole 5.
The tail pipe section 3 is a double-channel hard plastic pipe, a channel IV31 and a channel V32 are arranged in the tail pipe section 3, the channel IV31 is communicated with the channel II21, one end of the channel V32 is communicated with the channel III22, the other end of the channel V32 is communicated with an air injection connector 4 on the pipe wall of the tail pipe section 3, and the air injection connector 4 is connected with an injector 6.
The pneumoperitoneum-free single-port laparoscope and the choledochoscope protective sheath can be applied to choledochoscopes, laparoscopes, duodenoscopes and the like, and can be used as an endoscope, and the application range is wide.
Before operation, making an arc incision beside the navel, and cutting off the abdominal white line and the peritoneum; then placing the device into a laparoscope, communicating the laparoscope with the device, and placing the laparoscope and the device into the abdominal cavity through an incision; under laparoscopic monitoring, placement is made near the cholecystectomy. The injector 6 is used for injecting gas or water into the head pipe section 1 of the device of the invention through the gas injection hole 5, the head pipe section 1 is full, the connecting line at the joint between the inner and outer parts of the pipe wall is torn, the pipe wall is completely expanded to form a conical structure, and tissues around the gall bladder are squeezed out to form a certain operation space. The laparoscopic cholecystectomy can be realized by placing the device of the invention into the laparoscope and the operation instrument; in addition, the device is placed into a choledochoscope, so that the device can easily enter the gall bladder to perform operations such as observation, incision, stone extraction and the like in the gall bladder cavity.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (4)
1. An pneumoperitoneum-free single port laparoscope and choledochoscope protective sheath, comprising: a head pipe section (1), a body pipe section (2) and a tail pipe section (3) which are communicated in sequence;
The head pipe section (1) is a single-channel pipe, a channel I (11) is arranged in the head pipe section (1), the pipe wall is made of two layers of soft silica gel or resin materials, annular and radial joint surfaces are arranged between the two layers of soft silica gel or resin materials to form criss-cross channels, the head pipe section (1) is in a round table shape in the working state, the pipe wall of the head pipe section (1) in the non-working state is folded back and forth in a fan shape in the circumferential direction, the joint of the two adjacent folded surfaces after being folded forms a corner, the corners of the inner ring and the outer ring are mutually bonded, and the outer ring is in a cylindrical shape;
The joint of the head pipe section (1) and the body pipe section (2) is provided with an air injection hole (5), after air is injected through the air injection hole (5), the pressure of the inner cavity of the pipe wall of the head pipe section (1) is increased, the joint at the inner corner and the outer corner of the pipe wall is gradually torn, and finally, a truncated cone-shaped structure is formed through filling, and the appearance is of a conical structure;
The body pipe section (2) is a double-channel pipe and is a hard resin or silica gel hose, a channel II (21) and a channel III (22) are arranged in the body pipe section, the channel II (21) is communicated with the channel I (11), and the channel III (22) is communicated with the air injection hole (5);
The tail pipe section (3) is a double-channel hard plastic pipe, a channel IV (31) and a channel V (32) are arranged in the tail pipe section, the channel IV (31) is communicated with the channel II (21), one end of the channel V (32) is communicated with the channel III (22), the other end of the channel V is communicated with an air injection connector (4) on the pipe wall of the tail pipe section (3), and an injector (6) is connected to the air injection connector (4);
The outer diameter of the sheath tube is 10-30mm.
2. The pneumoperitoneum free single port laparoscope and choledochoscope protective sheath according to claim 1, wherein the inner diameter of the sheath is 8-25mm.
3. The pneumoperitoneum free single port laparoscope and choledochoscope protective sheath according to claim 1, wherein the sheath has a length of 60-80cm.
4. Pneumoperitoneum-free single port laparoscope and choledochoscope protecting sheath according to claim 1 or 2, wherein in working state, the diameter of the conical head end of the head pipe section (1) is 4-10cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010779866.2A CN111803019B (en) | 2020-08-05 | 2020-08-05 | Pneumoperitoneum-free single-port laparoscope and choledochoscope protective sheath and application thereof |
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| CN202010779866.2A CN111803019B (en) | 2020-08-05 | 2020-08-05 | Pneumoperitoneum-free single-port laparoscope and choledochoscope protective sheath and application thereof |
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| CN111803019B true CN111803019B (en) | 2024-05-07 |
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| CN112932572A (en) * | 2021-02-02 | 2021-06-11 | 山东中医药大学第二附属医院 | Department of general surgery exempts from pneumoperitoneum operation device with haplopore |
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| CN109091175A (en) * | 2018-07-27 | 2018-12-28 | 上海市东方医院 | It protects gallbladder and takes stone/polyp choledochoscope protection sheath |
| CN111419165A (en) * | 2020-03-26 | 2020-07-17 | 大连大学附属中山医院 | Single-port laparoscope choledochoscope sheath tube |
| CN111419150A (en) * | 2020-03-26 | 2020-07-17 | 大连大学附属中山医院 | Single-hole pneumoperitoneum-free choledochoscope sheath tube |
| CN212281316U (en) * | 2020-08-05 | 2021-01-05 | 上海市东方医院（同济大学附属东方医院） | Pneumoperitoneum-free single-hole laparoscope and choledochoscope protection sheath tube |
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|---|---|
| CN111803019A (en) | 2020-10-23 |
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