CN114391898B - Variable-rigidity folding access carrier based on elastic corrugated hose and layer blocking principle - Google Patents
Variable-rigidity folding access carrier based on elastic corrugated hose and layer blocking principle Download PDFInfo
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- CN114391898B CN114391898B CN202210126455.2A CN202210126455A CN114391898B CN 114391898 B CN114391898 B CN 114391898B CN 202210126455 A CN202210126455 A CN 202210126455A CN 114391898 B CN114391898 B CN 114391898B
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- 230000000903 blocking effect Effects 0.000 title claims abstract description 30
- 244000137852 Petrea volubilis Species 0.000 claims abstract description 56
- 238000007789 sealing Methods 0.000 claims abstract description 43
- 230000009471 action Effects 0.000 claims abstract description 17
- 238000001125 extrusion Methods 0.000 claims abstract description 4
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 4
- -1 polyethylene Polymers 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims 1
- 239000012528 membrane Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 8
- 238000005452 bending Methods 0.000 description 7
- 238000001356 surgical procedure Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 208000027418 Wounds and injury Diseases 0.000 description 4
- 238000002674 endoscopic surgery Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000002513 implantation Methods 0.000 description 3
- 208000014674 injury Diseases 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 208000034656 Contusions Diseases 0.000 description 1
- 206010052428 Wound Diseases 0.000 description 1
- 210000003484 anatomy Anatomy 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 208000034526 bruise Diseases 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 210000001072 colon Anatomy 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003238 esophagus Anatomy 0.000 description 1
- 210000000936 intestine Anatomy 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 210000001370 mediastinum Anatomy 0.000 description 1
- 238000002324 minimally invasive surgery Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 210000002784 stomach Anatomy 0.000 description 1
- 210000004888 thoracic abdominal cavity Anatomy 0.000 description 1
- 210000000115 thoracic cavity Anatomy 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 210000003932 urinary bladder Anatomy 0.000 description 1
- 210000001215 vagina Anatomy 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/00234—Surgical instruments, devices or methods for minimally invasive surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/08—Accessories or related features not otherwise provided for
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/00234—Surgical instruments, devices or methods for minimally invasive surgery
- A61B2017/00292—Surgical instruments, devices or methods for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/00234—Surgical instruments, devices or methods for minimally invasive surgery
- A61B2017/00292—Surgical instruments, devices or methods for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
- A61B2017/00336—Surgical instruments, devices or methods for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means with a protective sleeve, e.g. retractable or slidable
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/08—Accessories or related features not otherwise provided for
- A61B2090/0801—Prevention of accidental cutting or pricking
- A61B2090/08021—Prevention of accidental cutting or pricking of the patient or his organs
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Pathology (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a variable rigidity folding and unfolding road carrier based on an elastic fold hose and a layer blocking principle, which comprises an elastic fold hose, wherein the cross section of the elastic fold hose is in an octagonal star shape, the elastic fold hose is wrapped in a sealing cavity with an annular cross section, the outer surface of the elastic fold hose is covered with sheet-shaped sand paper to form a sand paper blocking layer, the sealing cavity is formed by forming a cylindrical inner sealing film, an outer sealing film, connecting pieces at two ends of the inner sealing film and the outer sealing film, and the inner sealing film and the outer sealing film are connected together in a sealing manner and then internally form an expansion air bag; the sand paper blocking layer is formed by covering sixteen sides of the elastic fold hose with inner-layer sheet sand paper and arranging eight convex corners of the elastic fold hose with outer-layer sheet sand paper in a staggered manner. When the gas in the sealing cavity is pumped out, the sand paper blocking layer is compressed under the action of the external atmospheric pressure, the extrusion force and the friction force between the sheet sand papers are increased, and the rigidity of the access carrier is increased; when the inflatable air bag is inflated, the elastic fold hose is unfolded under the action of radial force, and the access carrier is in a large-diameter state.
Description
Technical Field
The invention relates to the technical field of natural cavity passage surgical instruments, in particular to a variable-rigidity folding access carrier based on an elastic fold hose and layer blocking principle.
Background
With advances in technology, surgical procedures transition from open surgery to minimally invasive techniques. Non-invasive surgery, represented by natural transluminal endoscopic surgery (Natural Orifice Transluminal Endoscopic Surgery, NOTES), is now becoming a research hotspot. The endoscopic surgery through natural cavity is a brand new minimally invasive surgery paradigm for diagnosing and treating diseases by entering mediastinum, thoracic cavity or abdominal cavity through natural cavity channels such as esophagus, stomach, colon (straight) intestine, vagina, bladder and the like. Compared with the traditional open operation, the endoscopic operation through the natural cavity has the advantages of less pain, no scar on the body surface, small wound, quick recovery and the like, and accords with the modern super minimally invasive concept better.
Because the anatomical path of the human body lumen is long and narrow, the angle and the direction of the anatomical path of the human body lumen need to be passively adjusted to adapt to the physiological bending of the human body lumen in the process that a doctor controls the long and thin NOTES surgical instrument to be placed into the natural lumen of the human body. Considering the anatomical dimensions of the natural orifice of the human body, the outside diameter of the NOTES surgical instrument body structure is typically less than 20mm. Even so, advancement of NOTES surgical instruments during implantation and jitter during surgery can cause high frequency friction with, and even drag on, soft biological tissue within the lumen (especially at physiologically curved locations). Since no external force supports the NOTES surgical instrument and isolates it from the luminal tissue, high frequency intense contact causes complications such as mucosal rupture or bleeding. In addition, long-distance transmission and operation place special demands on the stiffness of NOTES surgical instruments.
Due to the complex shape of the anatomy of the human alimentary canal, NOTES surgical instruments are required to have sufficient "flexibility" during implantation to accommodate physiologic curvature of the alimentary canal, reducing bruise of surrounding tissues. When the NOTES surgical instrument reaches the focus position, the NOTES surgical instrument needs to have enough rigidity to keep stable pose, and reliable support guarantee is provided for the operation of the diagnosis and treatment surgery.
In view of the above, a folding and unfolding road carrier with variable rigidity is designed by applying a new principle and a new method and is used as an auxiliary tool of a NOTES surgical instrument so as to solve the problems, and the folding and unfolding road carrier has important significance.
Disclosure of Invention
The invention aims at overcoming the technical defects in the prior art and providing a variable stiffness folded access carrier based on an elastic corrugated hose and layer blocking principle. Under the state of softness and small diameter, the access carrier can adapt to physiological bending of a natural cavity of a human body and can be safely put in and pulled out; after the endoscope is placed in the target position, the access carrier can be transformed into a rigid and large-diameter state, and can be locked into shape, so that a stable and reliable access channel is provided for guiding and supporting NOTES surgical instruments. In addition, the access carrier can isolate the NOTES surgical instrument from the natural cavity of the human body, so that the force of the NOTES surgical instrument does not directly act on the natural cavity of the human body, and the safety of surgical operation can be improved.
The technical scheme adopted for realizing the purpose of the invention is as follows:
a variable stiffness folded access carrier based on elastic pleated tubing and layer occlusion principles, comprising:
the elastic fold hose is wrapped in a sealing cavity with an annular cross section, the outer surface of the elastic fold hose is covered with sheet-shaped sand paper to form a sand paper blocking layer, the sealing cavity is formed inside a cylindrical inner sealing film and an outer sealing film which are formed by sealing and connecting pieces at two ends of the inner sealing film and the outer sealing film together, and an expansion air bag is arranged inside the inner sealing film; when the inflatable air bag is inflated, the radial dimension of the inflatable air bag is enlarged;
the cross section of the elastic fold hose is in an octagonal star shape, has certain ductility and elasticity, and is unfolded into a large-diameter state under the action of external force; when no external force acts, the spring returns to a small diameter state under the action of self elastic restoring force; the sand paper blocking layer is formed by covering sixteen sides of the elastic corrugated hose with inner-layer sheet sand paper and arranging outer-layer sheet sand paper at eight convex corners of the elastic corrugated hose in a staggered manner;
when the air in the sealing cavity is pumped out by the air pumping device, the air pressure in the sealing cavity is reduced, the sand paper blocking layer is pressed under the action of the external atmospheric pressure, the extrusion force and the friction force between the sheet sand papers are increased, and therefore the rigidity of the access carrier is increased; when the inflatable air bag is inflated, the elastic fold hose is unfolded under the action of radial force, and the access carrier is in a large-diameter state.
From the above technical solution, it can be seen that the variable stiffness folded access carrier based on the elastic pleated hose and layer blocking principle provided by the present invention has at least one or a part of the following advantages:
1. the elastic fold hose is in an octagonal cross-section shape, the sheet sand paper is staggered in a distribution mode, the access carrier has large folding and unfolding retraction ratio and elasticity, and large curvature bending can be realized to adapt to a physiological bending structure of a natural human body cavity.
2. The access carrier can pass through a small cavity channel bent by a human body in a low-rigidity and small-diameter state, and then is converted into a high-rigidity and large-diameter state under the action of an inflatable air bag and an air extractor.
3. The access carrier can be converted into a large-diameter and high-rigidity state after being placed in a target position, and NOTES surgical instruments can be safely placed in a channel without resistance. In the operation process, the access carrier can provide safe and reliable guarantee, and can protect the human body cavity from physical injuries such as stabs, scratches and the like of NOTES surgical instruments.
4. After the NOTES surgical instrument performs the surgical operation, the access carrier can be restored to a state with small diameter and low rigidity under the self elastic action, so that the access carrier is safely withdrawn from the human body cavity, and obvious uncomfortable feeling is not caused to a patient.
5. The access carrier can change the rigidity of the access carrier through the regulating valve, and provides a stable support for NOTES surgical instruments so as to improve the stability and safety of surgical operation.
Drawings
Fig. 1 is a schematic view of the overall structure of a variable stiffness folded access carrier based on the elastic pleated hose and layer occlusion principle in accordance with an embodiment of the present invention.
Fig. 2 is a cross-sectional view taken along line A-A of fig. 1.
FIG. 3 is a schematic view showing the construction of an elastic corrugated hose of a variable stiffness folded access carrier based on the elastic corrugated hose and layer blocking principle according to an embodiment of the present invention
Fig. 4 is a cross-sectional view of fig. 3 taken along line D-D.
Fig. 5 is a schematic view of the construction of an elastic corrugated hose according to an embodiment of the present invention, after an inner layer of sandpaper is attached to the surface of a variable stiffness folded-in road carrier based on the principle of elastic corrugated hose and layer occlusion.
Fig. 6 is a cross-sectional view of fig. 5 taken along line B-B.
FIG. 7 shows a blocking layer of a variable stiffness folded access carrier based on the elastic pleated hose and layer blocking principles in accordance with an embodiment of the present invention
Fig. 8 is a cross-sectional view of fig. 7 taken along line C-C.
Fig. 9 is a system hardware configuration diagram of a variable stiffness folded access carrier based on the elastic pleated hose and layer occlusion principle according to an embodiment of the present invention.
Fig. 10 is a schematic view of the radial dimension and stiffness variation of a variable stiffness folded access carrier based on the elastic pleated hose and layer occlusion principle according to an embodiment of the present invention.
FIG. 11 is a flow chart of a variable stiffness folded access carrier for natural orifice surgery based on the elastic pleated tubing and layer occlusion principles in accordance with an embodiment of the present invention.
Fig. 12 is a schematic illustration of the application of a variable stiffness folded access carrier based on the elastic pleated hose and layer occlusion principle according to an embodiment of the present invention.
Description of the symbols in the drawings:
1-an ingress carrier; 2-inflating the balloon; 3-a pressure regulating valve; 4-a vacuum pump; 5-NOTES surgical instruments;
1-1-polyethylene film; 1-2-connectors; 1-3-pumping pipelines; 1-4-elastic pleated hose; 1-5-inner layer sand paper; 1-6-outer layer sand paper; 1-7-sandpaper blocking layer.
Detailed Description
The invention is described in further detail below with reference to the drawings and the specific examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In this specification, the various embodiments described below for the purpose of describing the principles of the present invention are illustrative only and should not be construed as limiting the scope of the invention in any way. The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention defined by the claims and their equivalents. The following description includes numerous specific details to aid in understanding, but these details should be construed as exemplary only. Accordingly, those of ordinary skill in the art will recognize that many variations and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness. Throughout the drawings, the same reference numerals are used for similar functions and operations.
Fig. 1 is a schematic view of the overall structure of a variable stiffness folded access carrier based on the elastic pleated hose and layer occlusion principle in accordance with an embodiment of the present invention. Referring to fig. 1 to 2, the variable stiffness folding access carrier is composed of a polyethylene film 1-1, a connector 1-2, an air suction pipeline 1-3, an elastic pleated hose 1-4, an inner layer sand paper 1-5 and an outer layer sand paper 1-6, and the inner layer sand paper 1-5 and the outer layer sand paper 1-6 form a sand paper blocking layer 1-7. The polyethylene films 1-1 of the inner layer and the outer layer are connected with the connecting pieces 1-2 at the two ends to form a sealing cavity with an annular transverse section. The elastic fold hose 1-4 and the sand paper blocking layer 1-7 thereon are wrapped by the outer polyethylene film 1-1 and integrally arranged in the sealing cavity, the air in the sealing cavity can be pumped out through the pumping pipeline 1-3 connected with the connecting piece 1-2 to form a negative pressure state, and the connecting piece 1-2 can be 3D printed.
The two end connectors forming the sealing cavity may be the same or different, so long as the sealing of the two ends can be achieved, and the shape or structure of the sealing cavity is not limited to the embodiment in the figure.
Fig. 3 to 8 are schematic views and corresponding cross-sectional views of an embodiment of a flexible pleated hose and sandpaper blocking layer of a variable stiffness folded access carrier based on the principle of flexible pleated hose and layer blocking, respectively, according to the present invention. The inner layer sand paper 1-5 is adhered to sixteen outer side surfaces of the elastic fold hose 1-4 by soft glue in a full-plane mode, the size of the inner layer sand paper 1-5 is 2mm x 15mm (can be designed according to specific situations and is not limited to the inner layer sand paper), the inner layer sand paper can be a plurality of pieces, the inner layer sand paper can be arranged along the axial direction of each side surface, one end of the inner layer sand paper is arranged to the other end of the inner layer sand paper, and adjacent sand paper on the last side surface is connected or a certain gap is reserved. The outer layer sand paper 1-6 is adhered to the convex angle of the elastic fold hose 1-4 by using a soft glue single side edge, the basic size of the outer layer sand paper 1-6 is 5mm x 15mm (can be designed according to specific situations and is not limited to the design), the outer layer sand paper is a plurality of pieces, the outer layer sand paper is arranged from one end to the other end along the axial direction, a certain gap is reserved between every two adjacent outer layer sand papers 1-6 along the same axial direction, the adjacent outer layer sand papers 1-6 along different axial directions are arranged in a staggered mode and partially overlapped to cover the gap part between every two adjacent outer layer sand papers, and the outer layer sand paper is arranged like roof tiles, so that the access carrier has good flexibility in a natural state.
In a preferred embodiment, the proximal end of the inner side of each of the outer sandpaper layers is connected to the outer top of one of the lobes of one of the flexible pleated hoses 1-4 and extends over and past an adjacent lobe and then over the third lobe.
Fig. 9 is a system hardware configuration diagram of a variable stiffness folded access carrier based on the elastic pleated hose and layer occlusion principle according to an embodiment of the present invention. One section of the air extraction pipeline 1-3 is connected with a sealing cavity of the variable-rigidity folding access carrier, and the other end of the air extraction pipeline is connected with a vacuum pump 4 through a pressure regulating valve 3. The pressure regulating valve 2 controls the rigidity of the variable rigidity folding road carrier by controlling the negative pressure of the sealing cavity. The inflatable balloon 2 is pre-positioned in the intermediate channel of the access carrier, which allows control of the radial dimension of the variable stiffness deployment access carrier.
Fig. 10 is a schematic view of the radial dimension and stiffness variation of a variable stiffness folded access carrier based on the elastic pleated hose and layer occlusion principle according to an embodiment of the present invention. The radial dimensions of the variable stiffness deployment access carrier may be controlled by the inflatable balloon 2. In the initial state, the elastic pleated hose 1-4 is in a retracted state, in which the access carrier is in a low stiffness, small diameter state. When the inflatable bag 2 is inflated, the elastic pleated hose 1-4 is deployed in a large diameter state by the inflatable bag 2. At the moment, the sealed cavity of the access carrier is pumped, the inner sand paper blocking layer 1-7 is tightly pressed with the outer sand paper 1-6 under the action of external atmospheric pressure, the extrusion force and friction force between the sand papers are increased, and the rigidity of the access carrier is increased, so that the access carrier is in a high-rigidity and large-diameter state. When the pressure in the restoring seal cavity is atmospheric pressure, the access carrier is retracted into a small-diameter and low-rigidity state under the action of the elastic restoring force of the elastic fold hose 1-4.
FIG. 11 is a flow chart of a variable stiffness folded access carrier for natural orifice endoscopic surgery based on the elastic pleated tubing and layer occlusion principles according to an embodiment of the present invention, including the following steps.
S1: under the natural state, the access carrier is in a state of low rigidity and small diameter, and the access carrier is placed in a natural cavity of a human body. The access carrier can be flexibly and passively adapted to the physiological bending of the natural cavity and reach the focus, and obvious uncomfortable feeling can not be caused to a patient in the process of implantation.
S2: positive pressure is applied to the inflatable air bag in the middle channel of the access carrier, so that the access carrier is unfolded to be in a large-diameter state, and the NOTES surgical instrument can pass through smoothly in subsequent operation.
S3: negative pressure is applied to the sealing cavity of the access carrier through the air extractor, so that the access carrier is in a high-rigidity state. The abrasive paper blocking layer inside the access carrier is compressed under the action of external atmospheric pressure, and the friction force between the abrasive paper blocking layers increases the rigidity of the access carrier and keeps a stable shape.
S4: the positive pressure of the inflated balloon is removed and withdrawn from the access carrier, and a NOTES surgical instrument is inserted through the intermediate passage of the access carrier to perform the surgical procedure. Under the action of negative pressure, the sand paper blocking layer can keep the middle channel of the access carrier in a large-diameter state. In the process of placing the NOTES surgical instrument, the access carrier can protect the cavity tissue from physical injuries such as stabs, scratches and the like of the NOTES surgical instrument. In addition, when performing the operation, the access carrier can play a role in supporting the NOTES surgical instrument to improve the accuracy of the operation.
S5: after the operation is finished, the NOTES surgical instrument is withdrawn, the negative pressure of the sealing cavity is removed, and the access carrier is retracted into a state with small diameter and low rigidity under the elastic restoring force of the elastic fold hose.
S6: the access carrier is extracted from the natural cavity of the human body. In a natural state, the access carrier is in a low-rigidity and small-diameter state, can be flexibly extracted from a natural cavity of a human body, and can not cause obvious uncomfortable feeling to a patient in the extraction process.
Fig. 12 shows the mating relationship between the access carrier 1 and NOTES surgical instrument 5.
From the above embodiments, it can be seen that the stiffness-variable folding access carrier based on the elastic fold hose and layer blocking principle in the embodiment of the invention has good flexibility in a natural state, can realize large curvature bending, and can adapt to physiological bending of a natural cavity of a human body. After the access carrier is placed in the natural cavity of the human body, the air bag is inflated to be in a large-diameter state, and the rigidity of the access carrier can be adjusted through the air exhaust device and the pressure regulating valve to be in a high-rigidity state. At this time, the access carrier in a large-diameter and high-rigidity state can provide a stable and safe access channel for the NOTES surgical instrument. In the process of placing the NOTES surgical instrument, the access carrier can protect human body cavity tissues from physical injuries such as stabs, scratches and the like of the NOTES surgical instrument. In the operation process, the access carrier can provide stable support for NOTES surgical instruments, and the safe operation is ensured. After the operation is finished, the access carrier can retract into a small-diameter and low-rigidity rotating state under the action of the restoring force of the elastic fold hose by adjusting the negative pressure of the sealing cavity, so that the access carrier can be safely extracted from the human body cavity.
While the fundamental and principal features of the invention and advantages of the invention have been shown and described, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof;
the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (6)
1. The flexible folding road carrier is characterized by comprising an elastic folding hose wrapped in a sealing cavity with an annular cross section, wherein the outer surface of the elastic folding hose is covered with sheet-shaped sand paper to form a sand paper blocking layer, the sealing cavity is formed inside after a cylindrical inner sealing film and an outer sealing film are formed and connected together by connecting pieces at two ends of the inner sealing film and the outer sealing film in a sealing way, and an expansion air bag is arranged inside the inner sealing film; when the inflatable air bag is inflated, the radial dimension of the inflatable air bag is enlarged; the cross section of the elastic fold hose is in an octagonal star shape, has certain ductility and elasticity, and is unfolded into a large-diameter state under the action of external force; when no external force acts, the spring returns to a small diameter state under the action of self elastic restoring force; the sand paper blocking layer is formed by covering sixteen sides of the elastic corrugated hose with inner-layer sheet sand paper and arranging outer-layer sheet sand paper at eight convex corners of the elastic corrugated hose in a staggered manner; the outer layer sand papers are a plurality of, are arranged from one end to the other end along the axial direction, a certain gap is reserved between two adjacent outer layer sand papers in the same axial direction, the adjacent outer layer sand papers in different axial directions are arranged in a staggered manner and partially overlapped to cover the gap part between the two adjacent outer layer sand papers; when the air in the sealing cavity is pumped out by the air pumping device, the air pressure in the sealing cavity is reduced, the sand paper blocking layer is pressed under the action of the external atmospheric pressure, the extrusion force and the friction force between the sheet sand papers are increased, and therefore the rigidity of the access carrier is increased; when the inflatable air bag is inflated, the elastic fold hose is unfolded under the action of radial force, and the access carrier is in a large-diameter state.
2. The flexible folding and unfolding road carrier based on the elastic fold hose and layer blocking principle according to claim 1, wherein the connecting piece is connected with an air extracting device, and a pressure regulating valve is further connected between the air extracting device and the connecting piece and used for regulating the negative pressure in the sealing cavity.
3. The flexible folding and unfolding road carrier based on the elastic folding hose and layer blocking principle according to claim 1, wherein inner-layer sheet sand paper distributed on the side surface of the elastic folding hose is bonded with the elastic folding hose in a full-plane mode through soft glue, and the sheet sand paper distributed on the convex angle of the elastic folding hose is partially bonded with the elastic folding hose through soft glue.
4. The variable stiffness folded access carrier based on the principle of elastic corrugated hose and layer occlusion of claim 1, wherein the elastic corrugated hose is made of a soft gel material.
5. The variable stiffness folded access carrier based on the elastic pleated hose and layer occlusion principle of claim 1, wherein the inflatable balloon is made of TPU film.
6. The variable stiffness folded access carrier based on the elastic pleated hose and layer occlusion principle of claim 1, wherein the sealing membrane is made of polyethylene film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210126455.2A CN114391898B (en) | 2022-02-10 | 2022-02-10 | Variable-rigidity folding access carrier based on elastic corrugated hose and layer blocking principle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210126455.2A CN114391898B (en) | 2022-02-10 | 2022-02-10 | Variable-rigidity folding access carrier based on elastic corrugated hose and layer blocking principle |
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| Publication Number | Publication Date |
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| CN114391898A CN114391898A (en) | 2022-04-26 |
| CN114391898B true CN114391898B (en) | 2024-02-23 |
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| CN202210126455.2A Active CN114391898B (en) | 2022-02-10 | 2022-02-10 | Variable-rigidity folding access carrier based on elastic corrugated hose and layer blocking principle |
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| CN116392215A (en) * | 2023-04-18 | 2023-07-07 | 张伟 | A sealed box and multifunctional channel for laparoscopic surgery |
| CN117360734A (en) * | 2023-10-27 | 2024-01-09 | 华南理工大学 | Bionic robotic fish |
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| DE102009037029A1 (en) * | 2009-08-13 | 2011-02-17 | Olympus Winter & Ibe Gmbh | Shank of a surgical instrument with bendable areas |
| CN105287000A (en) * | 2015-10-13 | 2016-02-03 | 西安交通大学 | Single-gas-drive flexible minimally invasive surgery operating arm and manufacturing method thereof |
| CN107280716A (en) * | 2017-07-17 | 2017-10-24 | 天津大学 | A kind of stiffness variable protection sheath and its application process performed the operation for natural cavity |
| CN107280718A (en) * | 2017-07-27 | 2017-10-24 | 天津大学 | A kind of folding exhibition variation rigidity apparatus arm and its application process performed the operation for natural cavity |
| CN112790798A (en) * | 2021-01-12 | 2021-05-14 | 天津大学 | A variable stiffness flexural protective sheath based on layer blocking principle and method of using the same |
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| US7972351B2 (en) * | 2004-07-13 | 2011-07-05 | Boston Scientific Scimed, Inc. | Balloon folding design and method and apparatus for making balloons |
| IT1400376B1 (en) * | 2009-06-23 | 2013-05-31 | N G C Medical S P A | TUBULAR STRUCTURE WITH VARIABLE DIAMETER, PARTICULARLY FOR BIOMEDICAL USE. |
| US8440090B2 (en) * | 2010-04-29 | 2013-05-14 | Abbott Cardiovascular Systems Inc. | Apparatus and method of making a variable stiffness multilayer catheter tubing |
| US10850064B2 (en) * | 2015-09-03 | 2020-12-01 | St. Jude Medical, Cardiology Division, Inc. | Introducer sheath having expandable portions |
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| DE102009037029A1 (en) * | 2009-08-13 | 2011-02-17 | Olympus Winter & Ibe Gmbh | Shank of a surgical instrument with bendable areas |
| CN105287000A (en) * | 2015-10-13 | 2016-02-03 | 西安交通大学 | Single-gas-drive flexible minimally invasive surgery operating arm and manufacturing method thereof |
| CN107280716A (en) * | 2017-07-17 | 2017-10-24 | 天津大学 | A kind of stiffness variable protection sheath and its application process performed the operation for natural cavity |
| CN107280718A (en) * | 2017-07-27 | 2017-10-24 | 天津大学 | A kind of folding exhibition variation rigidity apparatus arm and its application process performed the operation for natural cavity |
| CN112790798A (en) * | 2021-01-12 | 2021-05-14 | 天津大学 | A variable stiffness flexural protective sheath based on layer blocking principle and method of using the same |
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| CN114391898A (en) | 2022-04-26 |
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