CN115054185B - Endoscopic instrument tube, distal expandable insertion portion, handle, and endoscope - Google Patents
Endoscopic instrument tube, distal expandable insertion portion, handle, and endoscope Download PDFInfo
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- CN115054185B CN115054185B CN202210675199.2A CN202210675199A CN115054185B CN 115054185 B CN115054185 B CN 115054185B CN 202210675199 A CN202210675199 A CN 202210675199A CN 115054185 B CN115054185 B CN 115054185B
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- 238000003780 insertion Methods 0.000 title claims abstract description 63
- 230000037431 insertion Effects 0.000 title claims abstract description 63
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 83
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000000956 alloy Substances 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 238000009940 knitting Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 230000004308 accommodation Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000621 bronchi Anatomy 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003938 response to stress Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 208000008918 voyeurism Diseases 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
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
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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
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00066—Proximal part of endoscope body, e.g. handles
-
- 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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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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- Radiology & Medical Imaging (AREA)
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- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
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- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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- Veterinary Medicine (AREA)
- Endoscopes (AREA)
Abstract
The invention is applicable to the technical field of endoscopes, and provides an endoscopic instrument tube, a distal expandable insertion part, a handle and an endoscope, wherein the endoscopic instrument tube comprises: the device comprises an instrument tube body, wherein a preset tube section at the distal end of the instrument tube body is annularly provided with a shape memory alloy, and the shape memory alloy is mounted on the annular wall surface of the preset tube section; when the shape memory alloy reaches a preset trigger temperature, the shape memory alloy restores the preset shape, so that the preset pipe section at the distal end of the instrument pipe body deforms along the radial direction, and the preset pipe section at the distal end of the instrument pipe body is converted from the first cross-sectional shape to the second cross-sectional shape; the preset pipe section is only arranged at the distal end of the instrument pipe body, and the shape memory alloy is only required to be arranged on the preset pipe section at the distal end of the instrument pipe during production, and the shape memory alloy is not required to be arranged on the whole instrument pipe, so that the purpose of reducing the distal end size of the instrument pipe can be achieved, the shape memory alloy material is saved, and the production and processing cost is low.
Description
Technical Field
The invention belongs to the technical field of endoscopes, and relates to an endoscope instrument tube, a distal expandable insertion part, a handle and an endoscope.
Background
Endoscopes generally include: an insertion part for being inserted into the human body, a handle for controlling the front end of the insertion part to be bent, and a display device for displaying the internal environment of the natural cavity of the human body; the three basic parts are matched to realize the purposes of peeping, focus exploration and treatment in the human body.
However, when the lumen channel inserted into the inside of the human body is narrow, such as bronchi; therefore, the distal end of the insertion part is larger in the process of inserting the endoscope, so that the insertion process is hindered greatly, and if the forced insertion is easy to cause the wall surface of the internal cavity of the patient to bleed, the stress response of the patient is stronger, the operation is difficult to go on, and the treatment effect is not achieved.
In the prior art, the size of the insertion part is not practical to be reduced without limit, on one hand, after the insertion part is inserted into a human body, liquid in the human body needs to be injected or sucked into the human body through an instrument pipeline in the insertion part, and a treatment instrument is conveniently sent into the human body from the instrument pipeline, so that the reasonable size of the instrument pipe needs to be ensured during working; in summary, how to reduce the distal end size of the insertion portion so as to facilitate the insertion portion to reach the focus of the patient smoothly becomes a problem to be solved.
Disclosure of Invention
An object of the present invention is to provide an endoscopic instrument tube comprising:
the device comprises an instrument tube body, wherein a preset tube section at the distal end of the instrument tube body is annularly provided with a shape memory alloy, and the shape memory alloy is mounted on an annular wall surface of the preset tube section;
when the shape memory alloy reaches a preset trigger temperature, the shape memory alloy recovers a preset shape to deform the preset pipe section at the far end of the instrument pipe body in the radial direction, and the preset pipe section at the far end of the instrument pipe body is converted from a first cross-section shape to a second cross-section shape;
the projection area of the preset pipe section in the axial direction of the instrument pipe in the first cross-sectional shape is smaller than the projection area of the preset pipe section in the axial direction of the instrument pipe in the second cross-sectional shape.
Preferably, the preset pipe section is circumferentially provided with a single piece of shape memory alloy, the shape memory alloy is distributed along the axial direction of the preset pipe section, and the shape memory alloy is integrally and annularly closed;
or, the preset pipe section is circumferentially provided with a plurality of shape memory alloys, the shape memory alloys are distributed along the axial direction of the preset pipe section, and the annular sections are closed.
Preferably, the shape memory alloy is formed into a ring-like braided shape.
Preferably, the instrument tube body comprises: and one end of the electric wire is connected with the shape memory alloy, and the other end of the electric wire is connected with an electric connector.
Preferably, the shape memory alloy is embedded in the annular wall surface of the preset pipe section, or the shape memory alloy and the preset pipe section are integrally formed.
A distal expandable endoscope insertion section comprising:
an insertion part body;
a distal end housing having an accommodation space formed along an axial direction of the distal end housing for accommodating the preset tube section, the preset tube section at the distal end of the instrument tube body being fixedly installed in the accommodation space; the instrument tube body is disposed along the axial direction of the insertion portion body.
Preferably, the distal housing is peripherally provided with a radially expandable elastic facing layer surrounding a predetermined tube segment distal to the instrument tube body.
Preferably, the distal end of the pre-set tube segment coincides with the distal end of the distal housing.
An endoscope handle, comprising: a distal expandable endoscope insertion section as described above, the insertion section being disposed at a distal end of the endoscope handle.
An endoscope, comprising: an endoscope handle as described above.
The beneficial effects are that:
1. in the invention, the preset pipe section is only arranged at the distal end position of the instrument pipe body, and the shape memory alloy is only required to be arranged on the preset pipe section at the distal end of the instrument pipe during production, and the purpose of reducing the distal end size of the instrument pipe can be achieved without arranging the shape memory alloy on the whole instrument pipe, so that the shape memory alloy material is saved, and the production and processing cost is low.
2. In the invention, each piece of shape memory alloy can be provided with different elastic recovery shapes, and particularly, the shape memory alloy with the largest cross-sectional shape after the elastic recovery deformation can be arranged at the most distal end of the preset pipe section, so that the treatment instrument has a larger movable space after extending into the front end of the instrument pipe, and the operation of an operator on the treatment instrument is more convenient.
3. In the invention, when the preset pipe section is converted from the first cross-section form to the second cross-section form, the elastic covering layer also follows to realize elastic expansion, and can annularly surround the preset pipe section so as to be stably arranged at a preset installation position of the elastic covering layer to prevent the preset pipe section from moving.
4. In the invention, the preset pipe section is not moved along the axial direction in the process of changing from the first cross-section form to the second cross-section form, but is expanded along the radial direction, so that the distal end of the insertion part is expanded from a smaller distal end diameter to a larger distal end diameter required by working.
5. In the invention, the preset pipe section at the front end of the insertion part is in a first section form, and at the moment, the end surface cross section of the front end of the insertion part is smaller, so that the insertion part is easy to insert into a narrower human body cavity of a patient, when the ideal focus target position is reached, the electric connector connected with the shape memory alloy is optionally controlled, so that the shape memory alloy reaches the preset trigger temperature, the preset pipe section is in a second section form, and the opening at the front end of the instrument pipe reaches the suction/suction operation or has the section size required by inserting a treatment instrument, thereby realizing that an operator can conveniently extend the insertion part into the narrower human body cavity without influencing normal suction and the section size required by inserting the treatment instrument.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the embodiments of the present invention or the drawings used in the description of the prior art, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an instrument tube structure provided by an embodiment of the present invention;
FIG. 2 is a schematic illustration of a configuration of a pre-set section of an instrument tube provided with a monolithic shape memory alloy in a first cross-sectional configuration in accordance with an embodiment of the present invention;
FIG. 3 is a schematic view of a structure in which a preset tube section of an instrument tube is provided with a plurality of pieces of shape memory alloy according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of an apparatus tube according to an embodiment of the present invention in a process of expanding a preset tube section of the apparatus tube after a preset temperature is reached by arranging a plurality of pieces of shape memory alloy;
FIG. 5 is a schematic view showing a configuration of a preset tube section of an instrument tube provided by the embodiment of the invention, in which a plurality of pieces of shape memory alloy are arranged to reach a second cross-sectional morphology;
FIG. 6 is a schematic illustration of the configuration of a pre-set section of an instrument tube provided by an embodiment of the present invention with an annular braid shape memory alloy in a first cross-sectional configuration;
FIG. 7 is a schematic illustration of the configuration of a predetermined segment of an instrument tube provided with an annular braid shape memory alloy in a second cross-sectional configuration in accordance with an embodiment of the present invention;
FIG. 8 is a schematic diagram of a structure in which a preset tube section of an instrument tube according to an embodiment of the present invention is provided with a mesh intersection distance A when the shape memory alloy is in a second cross-sectional configuration;
FIG. 9 is a schematic diagram of a structure in which a preset tube section of an instrument tube according to an embodiment of the present invention is provided with a mesh intersection distance B when the shape memory alloy is in a first cross-sectional configuration;
FIG. 10 is a schematic view of an insert structure provided by an embodiment of the present invention;
FIG. 11 is a schematic view of a distal end of an insertion portion provided in an unexpanded state according to an embodiment of the present invention;
FIG. 12 is a schematic view of a distal end of an insertion portion in an expanded state according to an embodiment of the present invention;
fig. 13 is a schematic structural view of an insertion portion according to an embodiment of the present invention during insertion into a human body cavity environment;
fig. 14 is a schematic view of a structure of an extended state of a treatment instrument after an insertion portion provided in an embodiment of the present invention reaches a working position during insertion into a human body cavity environment;
fig. 15 is a schematic view of the structure of an endoscope handle provided by an embodiment of the present invention.
In the accompanying drawings:
10. an insertion part body; 100. a distal housing; 101. a distal end of the distal housing; 102. an LED; 103. a lens; 104. an elastic facing layer; 11. presetting a pipe section; 110. a second channel cross-sectional area; 10a, an instrument tube body; 12. a follow-up deformation section; 13. a non-preset pipe section; 130. a first channel cross-sectional area; 20. a shape memory alloy; 21a, an electrical lead; 21b, electrical leads; 21. a first braided wire; 22. a second braided wire; 30. a treatment instrument; 40. a human body lumen; 50. human tissue; 60. a handle.
Detailed Description
The following description provides many different embodiments, or examples, for implementing different features of the invention. The elements and arrangements described in the following specific examples are presented for purposes of brevity and are provided only as examples and are not intended to limit the invention.
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 some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the present invention, unless expressly stated or limited otherwise, a first feature may include first and second features directly contacting each other, either above or below a second feature, or through additional features contacting each other, rather than directly contacting each other. Moreover, the first feature being above, over, and on the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being below, beneath, and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is less level than the second feature.
In addition, in the invention, the 'near end' and the 'far end' are far and near positions of the structure relative to human body operation under the use environment, so that the description of the position relationship among the components is convenient, and meanwhile, the understanding is convenient; for the same component, "proximal" and "distal" are relative positional relationships of the component, not absolute; accordingly, it should be understood from the perspective of implementing the principles of the present invention without departing from the spirit of the invention.
Referring now to FIGS. 1-3, it is an object of the present invention to provide an endoscopic instrument tube comprising:
an instrument tube body 10a, wherein a preset tube section 11 at the distal end of the instrument tube body 10a is annularly provided with a shape memory alloy 20, and the shape memory alloy 20 is mounted on an annular wall surface of the preset tube section 11; the instrument tube body 10a is a flexible tube body having a certain deflection; in addition, the shape memory alloy 20 has a shape memory effect, which has an important property of being superelastic, in that the superelasticity of the shape memory alloy 20 is triggered at a certain temperature, and the trigger temperature is determined by the element composition of the alloy and the proportion thereof, so that the required superelasticity can be achieved by proper alloy composition proportion.
It should be noted that, the preset tube section 11 is only disposed at the distal end position of the instrument tube body 10a, and the shape memory alloy 20 is only required to be disposed on the preset tube section 11 at the distal end of the instrument tube during production, and the shape memory alloy 20 is not required to be disposed on the whole instrument tube, so that the purpose of reducing the distal end size of the instrument tube can be achieved, the material of the shape memory alloy 20 is saved, and the production and processing costs are low.
Thus, in the present invention, when the shape memory alloy 20 reaches the preset trigger temperature, the shape memory alloy 20 returns to the preset shape, so that the preset tube segment 11 at the distal end of the instrument tube body 10a expands radially, and the preset tube segment 11 at the distal end of the instrument tube body 10a changes from the first cross-sectional shape to the second cross-sectional shape;
wherein, the projection area of the preset pipe section 11 along the axial direction of the instrument pipe in the first cross-section form is smaller than the projection area of the preset pipe section 11 along the axial direction of the instrument pipe in the second cross-section form; specifically, referring to fig. 1, the left side view in fig. 1 is a projection of the right instrument tube along the view direction of the K-K section, and when the preset trigger temperature is not reached, the preset tube segment 11 is in the shape shown in fig. 1, and at this time, the preset tube segment 11 is in a flat shape compressed in the radial direction, that is, the first section shape in the present invention; when the use environment needs to reach the second cross-section shape, the electric wires (21 a, 21 b) connected with the instrument tube body 10a are connected with electricity to heat the instrument tube body, so that the shape memory alloy 20 reaches the predicted trigger temperature to elastically recover deformation; wherein one end of the electric wire (21 a, 21 b) is connected with the shape memory alloy 20, and the other end of the electric wire (21 a, 21 b) is connected with an electric connector, wherein the electric wire (21 a, 21 b) can be connected with the shape memory alloy 20, and also can be connected with a heat resistance wire, and the heat resistance wire is in veneering arrangement with the shape memory alloy 20, so that heat is conducted for shape memory, and the heat resistance wire reaches a preset trigger temperature.
It should be noted that, the preset tube section 11 and the non-preset tube section 13 of the instrument tube have a follow-up deformation section 12, the follow-up deformation section 12 is an integral structure of transition between the preset tube section 11 and the non-preset tube section 13, the area surrounded by the cross section gradually expands from the preset tube section 11 to the non-preset tube section 13, and when the shape memory alloy 20 does not reach the trigger temperature, the first channel cross section 130 of the non-preset tube section 13 is larger than the second channel cross section 110 of the preset tube section 11.
Referring to fig. 2, the preset pipe section 11 is provided with a single piece of shape memory alloy 20 in a surrounding manner, the shape memory alloy 20 is distributed along the axial direction of the preset pipe section 11, and is integrally and annularly closed; the monolithic shape memory alloy 20 needs to be described, and the monolithic shape memory alloy 20 is arranged in the preset pipe section 11, so that the monolithic shape memory alloy 20 has higher elastic restoring force, the monolithic shape memory alloy 20 can be used for producing the instrument pipe, the thickness can be selected to be thinner, more materials can be saved when the preset pipe section 11 is ensured to reach the second cross-section shape, and meanwhile, the wall thickness of the instrument pipe in the preset pipe section 11 can be reduced, and the integral wall thickness of the instrument pipe body 10a can be consistent.
Alternatively, as shown in fig. 3 to 5, the preset pipe section 11 is circumferentially provided with a plurality of pieces of shape memory alloy 20, the shape memory alloy 20 is distributed along the axial direction of the preset pipe section 11, and the annular segments are closed. By arranging a plurality of pieces of shape memory alloy 20, the triggering temperature of each piece of shape memory alloy can be controlled independently, and the preset pipe section 11 is gradually changed from the first section form to the second section form under the synergistic effect of each piece of shape memory alloy 20; moreover, it should be noted that, each piece of the shape memory alloy 20 may be provided with a different elastic recovery shape, and in particular, the shape memory alloy 20 having the largest cross-sectional shape after elastic recovery deformation may be provided at the distal-most end of the preset tube segment 11, so that the treatment instrument 30 may have a larger movement space after extending into the front end of the instrument tube, which is more convenient for the operator to operate the treatment instrument 30.
Further, as shown in fig. 6 to 9, the shape memory alloy 20 is formed in a ring-shaped braid shape. The shape memory alloy 20 in the annular knitting shape is provided with at least a first knitting wire 21 and a second knitting wire 22 which are circumferentially arranged, the first knitting wire 21 and the second knitting wire 22 form net-shaped staggering, and the radial interval is B under the first cross section shape of the preset pipe section 11 at the grid intersection point where the first knitting wire 21 and the second knitting wire 22 are adjacent; when the trigger temperature is reached, the mesh intersections between the first braided wire 21 and the second braided wire 22 are adjacent to each other at a radial distance a in the second cross-sectional configuration of the predetermined tube segment 11, wherein a is greater than B.
In addition, a first wire and a second wire are respectively provided at the proximal ends of the first braided wire 21 and/or the second braided wire 22, and the first wire and the second wire are connected to an electrical connector through which electricity is applied to bring the shape memory alloy 20 of the annular braided shape to a preset trigger temperature.
Further, the shape memory alloy 20 is embedded in the annular wall surface of the preset pipe section 11, or the shape memory alloy 20 and the preset pipe section 11 are integrally formed.
Referring now to fig. 10-12, the present invention also provides a distal expandable endoscope insertion section comprising:
an insertion part body;
a distal end housing 100 having a receiving space for receiving the predetermined tube segment 11 formed along an axial direction of the distal end housing 100, the predetermined tube segment 11 at a distal end of the instrument tube body 10a being fixedly installed in the receiving space; the instrument tube body 10a is disposed along the axial direction of the insertion portion body. In the present invention, the accommodating space may be a concave space for installing the preset tube section 11, a part of the outer wall of the preset tube section 11 may be glued to the concave wall surface, and at this time, the other part of the outer wall of the preset tube section 11 of the instrument tube forms the outer shell of the front end of the insertion portion, and in this embodiment, the shell which needs to be sleeved on the periphery of the preset tube section 11 is omitted, so that the front end of the insertion portion may be further reduced. The distal end housing 100 is further provided with an LED unit 102 for providing illumination and a lens 103 for collecting image information.
Preferably, as shown in fig. 10, the distal end housing 100 is provided with a radially expandable elastic coating 104 on the periphery thereof, and the elastic coating 104 surrounds the predetermined tube segment 11 at the distal end of the instrument tube body 10 a. Therefore, when the preset pipe section 11 is changed from the first cross-sectional shape to the second cross-sectional shape, the elastic covering layer 104 also follows to realize elastic expansion, the elastic covering layer 104 can annularly surround the preset pipe section 11 so as to enable the preset pipe section 11 to be stably arranged at a preset installation position, and prevent the preset pipe section 11 from moving.
Further, the distal end of the predetermined tube section 11 coincides with the distal end 101 of the distal housing. Therefore, the preset tube segment 11 of the present invention is not moved in the axial direction in the transition from the first cross-sectional configuration to the second cross-sectional configuration, but is radially expanded, so that the distal end surface of the insertion portion is changed from the configuration shown in fig. 11 to the configuration shown in fig. 12, and the distal end of the insertion portion is expanded from the smaller distal end diameter to the larger distal end diameter required in operation. It is to be noted here that, in the prior art, it is difficult to achieve by projecting the instrument tube in the axial direction to the distal end face of the insertion portion, because: 1. the size of the insertion tube is smaller, the diameter of the insertion tube is usually only a few millimeters, and meanwhile, a traction rope for controlling the active bending section of the insertion portion to bend, a signal transmission line for receiving images through a camera module at the distal end of the insertion portion, a cleaning channel and the like are required to be arranged in the insertion tube, so that the space in the insertion tube is limited, the friction force between the instrument tube and other components is large, and the distal end of the instrument tube is difficult to extend to the distal end face of the insertion portion along the axial direction of the instrument tube; 2. the proximal end of the instrument tube is connected to the instrument mouth of the endoscope handle 60, so that if the instrument tube is to be pushed to move along the axis direction, the instrument tube must be necessarily pushed to be realized by arranging a corresponding pushing mechanism on the endoscope handle 60, the design and space layout difficulty of the handle 60 must be increased, and a certain instrument tube length must be reserved for being connected to the instrument mouth, so that the connection state between the instrument tube and the instrument mouth is not influenced after the instrument tube is along the axis; 3. the instrument tube itself has a certain flexibility, so that when the instrument tube is pushed in the axial direction, the instrument tube is very easy to deform and break, increasing the risk of infection of the patient.
In actual operation, before the insertion portion is inserted into the human body cavity 40 of the human tissue 50, or before the position of the focus of the human body is reached, the preset tube segment 11 at the front end of the insertion portion is in the first cross-sectional configuration shown in fig. 2 or 11, at this time, the cross-sectional area of the end surface of the front end of the insertion portion is smaller, so that the insertion portion is easy to be inserted into the human body cavity 40 with a smaller patient, when the desired focus targeting position is reached, the operator can selectively control the electrical connector connected with the shape memory alloy 20 to enable the shape memory alloy 20 to reach the preset trigger temperature, the preset tube segment 11 is in the second cross-sectional configuration shown in fig. 5 or 12, and the opening at the front end of the instrument tube is up to the suction operation or is provided with the cross-sectional dimension required for inserting the treatment instrument 30 through the required cross-sectional dimension, as shown in fig. 13 and 14 in combination, so that the operator can conveniently extend the insertion portion into the human body with a smaller cavity without affecting normal suction and suction, and the cross-sectional dimension required for inserting the treatment instrument 30.
Referring now to fig. 15, the present invention also provides an endoscope handle 60 comprising: a distal expandable endoscope insertion section as described above is disposed at the distal end of the endoscope handle 60.
Further, the present invention also provides an endoscope including: an endoscope handle 60 as described above.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (9)
1. A distal expandable endoscope insertion section, characterized in that,
comprising the following steps:
an insertion part body;
an endoscopic instrument tube comprising an instrument tube body (10 a), a preset tube section (11) at the distal end of the instrument tube body (10 a) being annularly provided with a shape memory alloy (20), the shape memory alloy (20) being mounted to an annular wall surface of the preset tube section (11);
when the shape memory alloy (20) reaches a preset trigger temperature, the shape memory alloy (20) restores to a preset shape, so that the preset pipe section (11) at the far end of the instrument pipe body (10 a) deforms along the radial direction, the preset pipe section (11) at the far end of the instrument pipe body (10 a) is converted from a first cross-section shape to a second cross-section shape, an opening at the front end of the instrument pipe reaches suction/suction operation or has a cross-section size required by inserting a treatment instrument, the diameter of the far end of an inserting part is realized, and the distal end is expanded to the diameter required by working;
the projection area of the preset pipe section (11) along the axial direction of the instrument pipe in the first cross-section form is smaller than the projection area of the preset pipe section (11) along the axial direction of the instrument pipe in the second cross-section form;
a distal end housing (100) in which a receiving space for receiving the preset tube section (11) is formed in an axial direction of the distal end housing (100), the preset tube section (11) at the distal end of the instrument tube body (10 a) being fixedly installed in the receiving space; the instrument tube body (10 a) is disposed along the axial direction of the insertion portion body;
the device comprises a device tube body, wherein a follow-up deformation section is arranged between a preset tube section and a non-preset tube section of the device tube body, the area surrounded by the cross section of the device tube body gradually expands from the preset tube section to the non-preset tube section, and when the shape memory alloy does not reach a trigger temperature, the cross section of the non-preset tube section is larger than that of the preset tube section.
2. A distal expandable endoscope insertion section according to claim 1 and wherein:
the preset pipe section (11) is circumferentially provided with a single piece of the shape memory alloy (20), and the shape memory alloy (20) is distributed along the axial direction of the preset pipe section (11) and integrally and annularly closed;
or, the preset pipe section (11) is circumferentially provided with a plurality of pieces of shape memory alloy (20), the shape memory alloy (20) are distributed along the axis direction of the preset pipe section (11), and the integral annular sections are closed.
3. A distal expandable endoscope insertion section according to claim 1 and wherein:
the shape memory alloy (20) is formed into a ring-like braid shape.
4. A distal expandable endoscope insertion section according to claim 1, wherein,
comprising the following steps:
-an electrical lead (21 a), said electrical lead (21 a) being connected at one end to said shape memory alloy (20), said electrical lead (21 a) being connected at the other end to an electrical connector.
5. A distal expandable endoscope insertion section according to claim 1 and wherein:
the shape memory alloy (20) is embedded in the annular wall surface of the preset pipe section (11), or the shape memory alloy (20) and the preset pipe section (11) are integrally formed.
6. A distal expandable endoscope insertion section according to claim 1 and wherein:
the periphery of the distal end shell (100) is provided with an elastic covering layer (104) which can expand along the radial direction, and the elastic covering layer (104) surrounds a preset pipe section (11) at the distal end of the instrument pipe body (10 a).
7. A distal expandable endoscope insertion section according to claim 1 and wherein:
the distal end of the preset tube section (11) coincides with the distal end (101) of the distal housing.
8. An endoscope handle (60), characterized in that,
comprising the following steps:
a distal expandable endoscope insertion section according to any of claims 1-7, said insertion section being arranged distally of said endoscope handle (60).
9. An endoscope, which is characterized in that,
comprising the following steps:
an endoscope handle (60) as claimed in claim 8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210675199.2A CN115054185B (en) | 2022-06-15 | 2022-06-15 | Endoscopic instrument tube, distal expandable insertion portion, handle, and endoscope |
| PCT/CN2023/081136 WO2023241135A1 (en) | 2022-06-15 | 2023-03-13 | Endoscope tube, insertion portion with expandable distal end, handle, and endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210675199.2A CN115054185B (en) | 2022-06-15 | 2022-06-15 | Endoscopic instrument tube, distal expandable insertion portion, handle, and endoscope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115054185A CN115054185A (en) | 2022-09-16 |
| CN115054185B true CN115054185B (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210675199.2A Active CN115054185B (en) | 2022-06-15 | 2022-06-15 | Endoscopic instrument tube, distal expandable insertion portion, handle, and endoscope |
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| Country | Link |
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| CN (1) | CN115054185B (en) |
| WO (1) | WO2023241135A1 (en) |
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| CN115054185B (en) * | 2022-06-15 | 2024-04-12 | 湖南省华芯医疗器械有限公司 | Endoscopic instrument tube, distal expandable insertion portion, handle, and endoscope |
| CN115844491B (en) * | 2022-12-06 | 2023-05-16 | 杭州亿科医疗科技有限公司 | Thrombolysis device with controllable retraction and expansion of thrombolysis net |
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| JPH05176880A (en) * | 1991-12-27 | 1993-07-20 | Olympus Optical Co Ltd | Treating device for endoscope |
| US5607435A (en) * | 1994-05-23 | 1997-03-04 | Memory Medical Systems, Inc. | Instrument for endoscopic-type procedures |
| US5885258A (en) * | 1996-02-23 | 1999-03-23 | Memory Medical Systems, Inc. | Medical instrument with slotted memory metal tube |
| JP2011083329A (en) * | 2009-10-13 | 2011-04-28 | Hoya Corp | Endoscope cover |
| WO2015159719A1 (en) * | 2014-04-14 | 2015-10-22 | オリンパス株式会社 | Endoscope |
| US10433717B1 (en) * | 2018-06-28 | 2019-10-08 | Meditrina, Inc. | Endoscope having size-adjustable working channel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2935252B1 (en) * | 2008-09-01 | 2011-03-04 | Axess Vision Technology | INSTRUMENT FOR ENDOSCOPE. |
| CN116327271A (en) * | 2017-03-18 | 2023-06-27 | 波士顿科学国际有限公司 | System for minimally invasive treatment within a body cavity |
| CN115054185B (en) * | 2022-06-15 | 2024-04-12 | 湖南省华芯医疗器械有限公司 | Endoscopic instrument tube, distal expandable insertion portion, handle, and endoscope |
-
2022
- 2022-06-15 CN CN202210675199.2A patent/CN115054185B/en active Active
-
2023
- 2023-03-13 WO PCT/CN2023/081136 patent/WO2023241135A1/en unknown
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05176880A (en) * | 1991-12-27 | 1993-07-20 | Olympus Optical Co Ltd | Treating device for endoscope |
| US5607435A (en) * | 1994-05-23 | 1997-03-04 | Memory Medical Systems, Inc. | Instrument for endoscopic-type procedures |
| US5885258A (en) * | 1996-02-23 | 1999-03-23 | Memory Medical Systems, Inc. | Medical instrument with slotted memory metal tube |
| JP2011083329A (en) * | 2009-10-13 | 2011-04-28 | Hoya Corp | Endoscope cover |
| WO2015159719A1 (en) * | 2014-04-14 | 2015-10-22 | オリンパス株式会社 | Endoscope |
| US10433717B1 (en) * | 2018-06-28 | 2019-10-08 | Meditrina, Inc. | Endoscope having size-adjustable working channel |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023241135A1 (en) | 2023-12-21 |
| CN115054185A (en) | 2022-09-16 |
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