CN112587076A - Flexible bending insertion tube assembly of bronchoscope - Google Patents
Flexible bending insertion tube assembly of bronchoscope Download PDFInfo
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- CN112587076A CN112587076A CN202011587806.7A CN202011587806A CN112587076A CN 112587076 A CN112587076 A CN 112587076A CN 202011587806 A CN202011587806 A CN 202011587806A CN 112587076 A CN112587076 A CN 112587076A
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- 238000003780 insertion Methods 0.000 title claims abstract description 54
- 230000037431 insertion Effects 0.000 title claims abstract description 54
- 238000005452 bending Methods 0.000 title abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 63
- 241000270295 Serpentes Species 0.000 claims abstract description 40
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 40
- 230000007704 transition Effects 0.000 claims abstract description 34
- 229920002635 polyurethane Polymers 0.000 claims abstract description 20
- 239000004814 polyurethane Substances 0.000 claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 42
- 239000010959 steel Substances 0.000 claims description 42
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 238000009941 weaving Methods 0.000 claims description 12
- 229920001971 elastomer Polymers 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims 1
- 210000000621 bronchi Anatomy 0.000 abstract description 19
- 210000003437 trachea Anatomy 0.000 abstract description 7
- 230000006378 damage Effects 0.000 abstract description 5
- 210000004877 mucosa Anatomy 0.000 abstract description 5
- 239000010410 layer Substances 0.000 description 19
- 210000004072 lung Anatomy 0.000 description 10
- 210000003128 head Anatomy 0.000 description 6
- 238000003745 diagnosis Methods 0.000 description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 210000000214 mouth Anatomy 0.000 description 4
- 210000003928 nasal cavity Anatomy 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 210000002409 epiglottis Anatomy 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 210000002345 respiratory system Anatomy 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- 208000014181 Bronchial disease Diseases 0.000 description 1
- 206010011409 Cross infection Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000006223 plastic coating Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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- 229910000679 solder Inorganic materials 0.000 description 1
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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
- A61B1/267—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the respiratory tract, e.g. laryngoscopes, bronchoscopes
- A61B1/2676—Bronchoscopes
-
- 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
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
-
- 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
- A61B1/005—Flexible endoscopes
-
- 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
- A61B1/005—Flexible endoscopes
- A61B1/0051—Flexible endoscopes with controlled bending of insertion part
- A61B1/0055—Constructional details of insertion parts, e.g. vertebral elements
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- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Biomedical Technology (AREA)
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- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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- Endoscopes (AREA)
Abstract
The invention relates to a flexible bending insertion tube assembly of a bronchoscope, which has the innovation points that: the snake bone connection transition mechanism comprises a first spring pipe and a first net pipe, and the first net pipe is sleeved on the periphery of the first spring pipe; the main body mechanism of the insertion tube comprises a second spring tube, a second net tube and a medical polyurethane layer, the second net tube is sleeved on the periphery of the second spring tube, the outer wall of the second net tube is coated with the medical polyurethane layer, and the first spring tube and the second spring tube are connected into a whole; the second spring tube comprises a front section and a rear section, and the pitch P of the first spring tube1Pitch P less than that of the preceding section2Pitch P less than that of the rear section3The invention not only reduces the outer diameter of the head inserting part, but also divides the whole flexibility into three sections, thereby not only enabling the head of the inserting tube to be inserted smoothly, but also ensuring the inserting force of the rear section to operate, and avoiding the trachea and the tracheaThe mucosa of the bronchi causes damage.
Description
Technical Field
The invention relates to an insertion tube assembly, in particular to a flexible bending insertion tube assembly of a bronchoscope.
Background
The soft bronchoscope is widely applied to diagnosis or operation treatment of respiratory diseases, and an insertion tube of the soft bronchoscope can be inserted into a bronchus in the left lung lobe and the right lung lobe of the bronchus through a nasal cavity, an oral cavity or an epiglottis or through an incision of the bronchus to perform diagnosis or operation treatment. The design of the insertion tube of the existing soft bronchoscope is not ideal enough, the segmented hardness and softness effect is not good, and particularly, the flexibility of the front section or the middle section is not ideal enough. Has different stratification effects on the examination or treatment of human bronchial diseases. Some insertion is difficult with soft bronchoscopes. The operation time is too long to avoid the respiratory tract injury, and the pain of the testee is increased.
Whatever the specification of the insertion tube of the bronchoscope, the outer diameter of the insertion tube should be designed and produced as thin as possible under the premise of meeting the use requirement. Firstly, the pore canals of the internal tissue organ cavities of the human body are relatively small, and the larger the external diameter of the pore canals is, the more pain a subject suffers when entering the human body; secondly, when the inserting tube enters the bronchus of the lung lobe, the inserting tube needs to have a certain bending angle to enter the bronchus on the side surface of the lung lobe, so that the smaller the outer diameter of the inserting tube of the bronchoscope is, the better the outer diameter is after the inserting tube meets the use requirement. In the prior art, the spring tube and the net tube of the insertion tube are integrated, the insertion tube has uniform thickness, and the total external diameter of the insertion tube is relatively large due to the relatively small pore canal of the internal tissue organ cavity of the human body, so that the pain of a testee is more serious when the insertion tube enters the human body.
Disclosure of Invention
The purpose of the invention is: the utility model provides a not only head inserted part external diameter diminishes, and whole compliance is divided into the three-section moreover, can let the head of intubate smoothly insert, and its insertion force can be guaranteed again in the back end operation, can not cause the flexible crooked intubate of bronchoscope of damage to trachea and bronchial mucosa.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a flexible crooked insertion tube assembly of bronchoscope which innovation point lies in: comprises a snake bone connecting and transition mechanism and an inserting tube main body mechanism, wherein the snake bone connecting and transition mechanism and the inserting tube main body mechanism are connected into a whole, the outer diameter of the snake bone connecting and transition mechanism is smaller than that of the inserting tube main body mechanism,
the snake bone connecting and transition mechanism comprises a first spring pipe and a first net pipe, and the first net pipe is sleeved on the periphery of the first spring pipe;
the main body mechanism of the insertion tube comprises a second spring tube, a second net tube and a medical polyurethane layer, the second net tube is sleeved on the periphery of the second spring tube, the outer wall of the second net tube is coated with the medical polyurethane layer, one end of the first spring tube is a snake bone connecting end, and the other end of the first spring tube is connected with the second spring tube into a whole;
the second spring tube comprises a front section and a rear section which are integrated with each other, and the pitch P of the first spring tube11.8 mm-2.5 mm, the pitch P of the front section22.3 mm-2.8 mm, the pitch P of the rear section32.6mm to 3.2mm, and P1＜P2＜P3。
In the above technical scheme, still include the spring inner joint circle, the other end of first spring pipe is even as an organic whole with the anterior segment of second spring pipe through the spring inner joint circle, and the both ends of spring inner joint circle are established respectively in the hole of first spring pipe and second spring pipe.
In the above technical scheme, the outer peripheral wall of the spring inner joint ring is provided with a separation positioning ring which is integrated with or fixedly connected with the outer peripheral wall, the other end of the first spring tube is sleeved on the outer periphery of part of the spring inner joint ring and welded with the outer periphery of the part of the spring inner joint ring into a whole, the front section of the second spring tube is sleeved on the outer periphery of the rest part of the spring inner joint ring and welded with the rest part of the spring inner joint ring into a whole, the front sections of the first spring tube and the second spring tube are respectively located on two sides of the separation positioning ring, and two ends of the second network tube are respectively welded with two ends of.
In the technical scheme, the outer diameter of the separation positioning ring at the periphery of the spring inner connecting ring is smaller than the outer diameters of the first spring tube and the second spring tube, and a rubber sleeve binding wire groove is formed.
In the above technical solution, the steel belt wall thickness d of the first spring tube10.08mm to 0.10mm, and the width W of the steel strip11.5 mm-1.7 mm, the steel belt wall thickness d of the second spring tube20.10 mm-0.15 mm, steel strip width W22.0 mm-2.2 mm, the width W of the steel belt of the first spring tube1The width W of the steel belt is less than that of the second spring tube2。
In the above technical solution, the overall length L of the snake bone connection transition mechanism and the insertion tube main body mechanism is 480mm to 650mm, and the overall length L of the snake bone connection transition mechanism is125 mm-50 mm, the whole length L of the main body mechanism of the insertion tube2Is 442mm to 612mm, and the length L of the front section of the second spring tube21232 mm-302 mm, the length L of the rear section22Is 210 mm-310 mm.
In the above technical solution, the outer diameter Φ of the first mesh tube13.50 mm-5.60 mm, a weaving angle beta1Is 45 DEG, and the pitch of the crossing point H11.5mm to 1.5 mm; the outer diameter phi of the second net pipe23.50 mm-5.60 mm, a weaving angle beta2Is 45 DEG, and the pitch of the crossing point H2Is 2.0 mm-2.0 mm.
In the above technical scheme, the shore hardness of the medical polyurethane layer of the peripheral portion corresponding to the front section of the second spring tube is 40-42A, and the shore hardness of the medical polyurethane layer of the peripheral portion corresponding to the rear section is 66-70A.
In the technical scheme, the first net pipe is formed by weaving 32-36 bundles of steel wires, each bundle of steel wires is formed by combining 4 steel wires into one bundle, the second net pipe is formed by weaving 36-48 bundles of steel wires, each bundle of steel wires is formed by combining 6 steel wires into one bundle, and the diameter of each bundle of steel wires of the first net pipe is smaller than that of each bundle of steel wires of the second net pipe.
In the technical scheme, the thickness of the medical polyurethane layer is 0.05 mm-0.15 mm.
The invention has the positive effects that: after the flexible bending insertion tube assembly of the bronchoscope is adopted, as the flexible bending insertion tube assembly comprises the snake bone connecting transition mechanism and the insertion tube main body mechanism, the snake bone connecting transition mechanism and the insertion tube main body mechanism are connected into a whole, and the outer diameter of the snake bone connecting transition mechanism is smaller than that of the insertion tube main body mechanism,
the snake bone connecting and transition mechanism comprises a first spring pipe and a first net pipe, and the first net pipe is sleeved on the periphery of the first spring pipe;
the main body mechanism of the insertion tube comprises a second spring tube, a second net tube and a medical polyurethane layer, the second net tube is sleeved on the periphery of the second spring tube, the outer wall of the second net tube is coated with the medical polyurethane layer, one end of the first spring tube is a snake bone connecting end, and the other end of the first spring tube is connected with the second spring tube into a whole;
the second spring tube comprises a front section and a rear section which are integrated with each other, and the pitch P of the first spring tube11.8 mm-2.5 mm, the pitch P of the front section22.3 mm-2.8 mm, the pitch P of the rear section32.6mm to 3.2mm, and P1＜P2＜P3；
When the snake bone connecting transition mechanism is used, a snake bone is arranged on a first spring pipe of the snake bone connecting transition mechanism, and a soft rubber protective sleeve is sleeved on the periphery of the first pipe, so that the snake bone connecting transition mechanism has the advantages that: firstly, the snake bone connecting and transition mechanism and the inserting tube main body mechanism are divided into two sections with different outer diameters, the outer diameter of the snake bone connecting and transition mechanism is smaller than that of the inserting tube main body mechanism, when the endoscope is inserted into the nasal cavity or the oral cavity of a human body, the epiglottis and the trachea and the bronchus of the human body, the smaller the outer diameter of the insertion tube is, the friction force with the wall of the tiny cavity channel of the human body can be reduced, the damage to the wall of the tiny cavity channel of the relevant human body can be avoided or reduced, secondly, because the first spring tube is the most flexible, the second spring tube of the insertion tube main body mechanism is divided into two sections with different hardness, and the flexibility of the front section of the second spring tube is between the first spring tube and the rear section, the angle of bending is large when the bronchus is bent to about 90 degrees and enters the left lung lobe and the right lung lobe, and the bronchus with the bend of about 90 degrees, the bifurcation, and the like cannot be damaged. Therefore, the invention not only reduces the outer diameter of the head inserting part, but also divides the whole flexibility into three sections, thereby not only enabling the head of the inserting tube to be inserted smoothly, but also ensuring the inserting force of the rear section operation, and not damaging the mucosa of the trachea and the bronchus.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of the structure of FIG. 1 after the mesh tube is exposed;
FIG. 3 is a schematic view of the assembled two sets of spring tubes and mesh tubes of the present invention;
FIG. 4 is a schematic view of the construction of a first spring tube of the present invention;
FIG. 5 is a schematic structural view of a second spring tube of the present invention;
FIG. 6 is a schematic view of the assembly of the first and second spring tubes of the present invention;
fig. 7 is a schematic view of the construction of the spring innerspring of the invention.
Detailed Description
The invention is further illustrated, but not limited, by the following examples in connection with the accompanying drawings.
As shown in fig. 1, 2, 3, 4, 5, 6 and 7, a flexible bending insertion tube assembly of a bronchoscope comprises a snake bone connection transition mechanism 1 and an insertion tube main body mechanism 2, wherein the snake bone connection transition mechanism 1 and the insertion tube main body mechanism 2 are connected into a whole, the outer diameter of the snake bone connection transition mechanism 1 is smaller than that of the insertion tube main body mechanism 2,
the snake bone connecting and transition mechanism 1 comprises a first spring pipe 11 and a first net pipe 12, wherein the first net pipe 12 is sleeved on the periphery of the first spring pipe 11;
the inserting tube main body mechanism 2 comprises a second spring tube 21, a second net tube 22 and a medical polyurethane layer 23, the second net tube 22 is sleeved on the periphery of the second spring tube 21, the outer wall of the second net tube 22 is coated with the medical polyurethane layer 23, one end of the first spring tube 11 is a snake bone connecting end, and the other end of the first spring tube is connected with the second spring tube 21 into a whole;
the second spring tube 21 comprises a front section 211 and a rear section 212 which are integrated with each other, and the pitch P of the first spring tube 1111.8 mm-2.5 mm, the pitch P of the front section 21122.3 mm-2.8 mm, the pitch P of the back section 21232.6mm to 3.2mm, and P1＜P2＜P3。
As shown in fig. 3, 6 and 7, the present invention further includes a spring inner connecting ring 3, the other end of the first spring tube 11 is connected with the front section 211 of the second spring tube 21 into a whole through the spring inner connecting ring 3, and two ends of the spring inner connecting ring 3 are respectively disposed in the inner holes of the first spring tube 11 and the second spring tube 21. Two ends of the spring inner connecting ring 3 are respectively inserted into inner holes of the first spring tube 11 and the second spring tube 21 and are welded into a whole, so that the diameter of the outer diameter plastic coating is reduced, and the total length of the spring inner connecting ring 3 is 2.0-2.5 mm. Furthermore, the optimized total length of the spring inner connecting ring is 2.5mm, which is at least 0.5mm shorter than the same parts of domestic and foreign enterprises. At present, the length of the same parts of similar enterprises at home and abroad is more than or equal to 3 mm. Since the shorter the part, the better the curved shape, the better the bending softness there. Therefore, the outer diameter of the spring inner connecting ring 3 adopted by the invention is inserted into the inner diameter of the spring pipe hole, the outer diameter is smaller than that of the net pipe, after the spring inner connecting ring is connected with the first spring pipe 11 and the second spring pipe 21, the wall thickness size connected on the outer diameter of the net pipe is at least reduced, so that the outer diameter of the whole cylinder of the inserting pipe is small, the outer diameter size of the inserting pipe is effectively controlled by the outer diameter size of the outermost rubber pipe, and the outer diameter size of the inserting pipe is controlled within the minimum limit, so that a subject feels almost painless when the inserting pipe is used for human body diagnosis.
As shown in fig. 7, in order to enable the first spring tube and the second spring tube of the present invention to be rapidly positioned and assembled with the inner spring ring, a separation positioning ring 31 integrated with or fixedly connected to the outer peripheral wall of the inner spring ring 3 is disposed on the outer peripheral wall of the inner spring ring 3, the other end of the first spring tube 11 is sleeved on the outer peripheral wall of a part of the inner spring ring 3 and welded to the same, a front section 211 of the second spring tube 21 is sleeved on the outer peripheral wall of the remaining part of the inner spring ring 3 and welded to the same, the front sections 211 of the first spring tube 11 and the second spring tube 21 are respectively located on two sides of the separation positioning ring 31, and two ends of the second mesh tube 22 are respectively welded to two ends of the second spring tube 21 through solder to form a whole.
As shown in fig. 3 and 6, in the process of entering the human body diagnosis, the snake bone connection transition mechanism 1 needs to sleeve a soft rubber protective sleeve on the periphery of the first net tube 12, in order to facilitate the wire binding and fixing of the end of the rubber protective sleeve, the outer diameter of the separation and positioning ring 31 on the periphery of the spring inner joint ring 3 is smaller than the outer diameters of the first spring tube 11 and the second spring tube 21, and a rubber sleeve binding groove 4 is formed. That is, the binding wire for fixing the end of the rubber boot is positioned in the rubber boot binding wire groove 4.
As shown in fig. 4 and 5, in order to make the structure of the present invention more reasonable and make the softness of the first spring tube higher than that of the second spring tube, the steel belt wall thickness d of the first spring tube 11 is10.08mm to 0.10mm, and the width W of the steel strip11.5mm to 1.7mm, the steel strip wall thickness d of the second spring tube 2120.10 mm-0.15 mm, steel strip width W22.0mm to 2.2mm, the width W of the steel strip of the first spring tube 111The width W of the steel strip is less than that of the second spring tube 212。
As shown in FIG. 3, the overall length L of the snake bone connection transition mechanism 1 and the insertion tube main body mechanism 2 is 480mm to 650mm, and the overall length L of the snake bone connection transition mechanism 1125 mm-50 mm, the whole length L of the inserting tube main body mechanism 22Is 442mm to 612mm, the length L of the front section 211 of the second spring tube 2121232 mm-302 mm, the length L of the back section 21222Is 210 mm-310 mm.
As shown in fig. 2, further, the outer diameter Φ of the first mesh tube 1213.50 mm-5.60 mm, a weaving angle beta1Is 45 DEG, and the pitch of the crossing point H11.5mm to 1.5 mm; the outer diameter phi of the second mesh tube 2223.50 mm-5.60 mm, a weaving angle beta2Is 45 DEG, and the pitch of the crossing point H2Is 2.0 mm-2.0 mm.
Furthermore, the shore hardness of the medical polyurethane layer of the outer peripheral portion corresponding to the front section 211 of the second spring tube 21 is 40-42A, and the shore hardness of the medical polyurethane layer of the outer peripheral portion corresponding to the rear section 212 is 66-70A.
Further, in order to make the softness of the first mesh pipe 12 higher than that of the second mesh pipe 22, the first mesh pipe 12 is formed by weaving 32 to 36 bundles of steel wires, each bundle of steel wires is formed by combining 4 steel wires into one bundle, the second mesh pipe 22 is formed by weaving 36 to 48 bundles of steel wires, each bundle of steel wires is formed by combining 6 steel wires into one bundle, and the diameter of each bundle of steel wires of the first mesh pipe 12 is smaller than that of each bundle of steel wires of the second mesh pipe 22.
Further, the thickness of the medical polyurethane layer 23 is 0.05 mm-0.15 mm. Design length sign's word or lines on the periphery wall of medical polyurethane layer 23, in order to prevent the friction of insert tube in the use, the length typeface and the lines on its hose surface wear out very easily, consequently are equipped with transparent film layer 24, and the advantage of design like this lies in:
(1) the transparent film layer on the outermost layer of the insertion tube can effectively protect the abrasion of characters and lines of the length marks;
(2) the transparent film layer arranged on the outermost layer of the insertion tube is a plastic film resistant to disinfectant;
(3) the film protective layer can effectively increase the times of repeated disinfection, prevent the surface of the insertion tube from aging and prolong the service life, and the disinfection is to effectively prevent the cross infection among the subjects.
The insertion tube of the bronchoscope in the prior art is composed of a plurality of parts, wherein a plurality of positions are provided with longer soldering connecting sections, and the soldering connecting sections in the prior art are generally designed to be 6mm to 10mm in length at the welding section part of the hose, so that an inflexible hard section is formed to be longer, and the flexibility of the hose during bending is obviously influenced; the longer the welding position of the joint or the metal mesh pipe and the inner layer spring is, the longer the non-bendable section of the hose is, and if tin soldering is performed, molten tin flows along with a high-temperature position, and the larger the flowing area of the tin is, the longer the hard section of the tin is. The longer the welded segment is, the more the bending performance of the flexible bending hose is seriously affected.
Therefore, all the medical flexible endoscope insertion tubes require a rigid metal joint (joint ring) or a length of a rigid section after welding, in combination with the relevant parts and welding. After the connection strength is satisfied, and the requirement of bending flexibility is satisfied, it is designed to be as short as possible.
In order to overcome the problems, the length of the first net pipe welded with the first spring pipe at two ends and the length of the second net pipe welded with the second spring pipe at two ends are both controlled between 2mm and 3.8mm, and the bending performance of the whole insertion pipe is not influenced. The advantages are that:
(1) when the artificial tongue is inserted into a respiratory system, a nasal cavity or an oral cavity and enters a pharyngeal portion, the uncomfortable feeling of a subject is further relieved;
(2) especially when the inserting tube enters the diagnosis of the bronchus inside the lung lobe of the human body, the front section of the soft inserting tube can pass through smoothly, and the trachea, the inner wall of the bronchus and the mucosa cannot be damaged;
(3) when the bronchus in the left or right lobe of the lung needs to be diagnosed, the bending angle of the front section of the insertion tube is larger than about 90 degrees, and the front section of the insertion tube is bent by about 90 degrees and enters the bronchus of the lobe, so that the playground of the related bronchus and the bifurcation can not be damaged.
The present invention provides 3 specific examples of different structural parameters, as shown in table 1:
TABLE 1
As can be seen from Table 1, the softness of the final product varies depending on the values of the parameters of the three examples.
When the snake bone connecting transition mechanism is used, a snake bone is arranged on the first spring pipe 11 of the snake bone connecting transition mechanism 1, and the periphery of the first net pipe 12 is sleeved with the soft rubber protective sleeve, so that the snake bone connecting transition mechanism has the advantages that: firstly, the snake bone connecting and transition mechanism and the inserting tube main body mechanism are divided into two sections with different outer diameters, the outer diameter of the snake bone connecting and transition mechanism is smaller than that of the inserting tube main body mechanism, when the endoscope is inserted into the nasal cavity or the oral cavity of a human body, the epiglottis and the trachea and the bronchus of the human body, the smaller the outer diameter of the insertion tube is, the friction force with the wall of the tiny cavity channel of the human body can be reduced, the damage to the wall of the tiny cavity channel of the relevant human body can be avoided or reduced, secondly, because the first spring tube is the most flexible, the second spring tube of the insertion tube main body mechanism is divided into two sections with different hardness, and the flexibility of the front section of the second spring tube is between the first spring tube and the rear section, the angle of bending is large when the bronchus is bent to about 90 degrees and enters the left lung lobe and the right lung lobe, and the bronchus with the bend of about 90 degrees, the bifurcation, and the like cannot be damaged. Therefore, the invention not only reduces the outer diameter of the head inserting part, but also divides the whole flexibility into three sections, thereby not only enabling the head of the inserting tube to be inserted smoothly, but also ensuring the inserting force of the rear section operation, and not damaging the mucosa of the trachea and the bronchus.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A flexible curved insertion tube assembly for a bronchoscope, comprising: comprises a snake bone connecting and transition mechanism (1) and an inserting tube main body mechanism (2), wherein the snake bone connecting and transition mechanism (1) and the inserting tube main body mechanism (2) are connected into a whole, the outer diameter of the snake bone connecting and transition mechanism (1) is smaller than that of the inserting tube main body mechanism (2),
the snake bone connecting and transition mechanism (1) comprises a first spring pipe (11) and a first net pipe (12), wherein the first net pipe (12) is sleeved on the periphery of the first spring pipe (11);
the inserting tube main body mechanism (2) comprises a second spring tube (21), a second net tube (22) and a medical polyurethane layer (23), the second net tube (22) is sleeved on the periphery of the second spring tube (21), the outer wall of the second net tube (22) is coated with the medical polyurethane layer (23), one end of the first spring tube (11) is a snake bone connecting end, and the other end of the first spring tube is connected with the second spring tube (21) into a whole;
the second spring tube (21) comprises a front section (211) and a rear section (212) which are integrated with each other, and the screw pitch P of the first spring tube (11)1Is 1.8 mm-2.5 mm, the pitch P of the front section (211)22.3 mm-2.8 mm, the pitch P of the rear section (212)32.6mm to 3.2mm, and P1＜P2＜P3。
2. The bronchoscope flexible bend insertion tube assembly of claim 1, wherein: still include spring inner joint circle (3), the other end of first spring pipe (11) is linked as an organic whole through spring inner joint circle (3) and anterior segment (211) of second spring pipe (21), and the both ends of spring inner joint circle (3) are established respectively in the hole of first spring pipe (11) and second spring pipe (21).
3. The bronchoscope flexible bend insertion tube assembly of claim 2, wherein: the outer peripheral wall of the spring inner joint ring (3) is provided with a separation positioning ring (31) which is integrated with the spring inner joint ring or fixedly connected with the spring inner joint ring, the other end of the first spring tube (11) is sleeved on the partial periphery of the spring inner joint ring (3) and welded with the spring inner joint ring into a whole, the front section (211) of the second spring tube (21) is sleeved on the residual periphery of the spring inner joint ring (3) and welded with the spring inner joint ring into a whole, the first spring tube (11) and the front section (211) of the second spring tube (21) are respectively positioned at two sides of the separation positioning ring (31), and two ends of the second net tube (22) are respectively welded with two ends of the second spring tube (21) into a whole through welding materials.
4. The bronchoscope flexible bend insertion tube assembly of claim 3, wherein: the outer diameter of a separation positioning ring (31) on the periphery of the spring inner connecting ring (3) is smaller than the outer diameters of the first spring tube (11) and the second spring tube (21), and a rubber sleeve binding wire groove (4) is formed.
5. The bronchoscope flexible bend insertion tube assembly of claim 1, wherein: the steel strip wall thickness d of the first spring tube (11)10.08mm to 0.10mm, and the width W of the steel strip1Is 1.5 mm-1.7 mm, the steel belt wall thickness d of the second spring tube (21)20.10 mm-0.15 mm, steel strip width W2Is 2.0 mm-2.2 mm, the width W of the steel strip of the first spring tube (11)1The width W of the steel strip is less than that of the second spring tube (21)2。
6. The bronchoscope flexible bend insertion tube assembly of claim 1, wherein: the overall length L of the snake bone connection transition mechanism (1) and the insertion tube main body mechanism (2) is 480 mm-650 mm, and the overall length L of the snake bone connection transition mechanism (1)1Is 25 mm-50 mm, the whole length L of the inserting tube main body mechanism (2)2Is 442 mm-612 mm, the length L of the front section (211) of the second spring tube (21)21232 mm-302 mm, the length L of the rear section (212)22Is 210 mm-310 mm.
7. The bronchoscope flexible bend insertion tube assembly of claim 1, wherein: the outer diameter phi of the first mesh pipe (12)13.50 mm-5.60 mm, and a weaving angle beta1Is 45 DEG, and the pitch of the crossing point H11.5mm to 1.5 mm; the outer diameter phi of the second mesh tube (22)23.50 mm-5.60 mm, and a weaving angle beta2Is 45 DEG, and the pitch of the crossing point H2Is 2.0mm to 2.0 mm.
8. The bronchoscope flexible bend insertion tube assembly of claim 1, wherein: the Shore hardness of the medical polyurethane layer of the peripheral part corresponding to the front section (211) of the second spring tube (21) is 40-42A, and the Shore hardness of the medical polyurethane layer of the peripheral part corresponding to the rear section (212) is 66-70A.
9. The bronchoscope flexible bend insertion tube assembly of claim 1, wherein: the first net pipe (12) is formed by weaving 32-36 bundles of steel wires, each bundle of steel wires is formed by combining 4 steel wires into one bundle, the second net pipe (22) is formed by weaving 36-48 bundles of steel wires, each bundle of steel wires is formed by combining 6 steel wires into one bundle, and the diameter of each bundle of steel wires of the first net pipe (12) is smaller than that of each bundle of steel wires of the second net pipe (22).
10. The bronchoscope flexible bend insertion tube assembly of claim 1, wherein: the thickness of the medical polyurethane layer (23) is 0.05 mm-0.15 mm.
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