CN216495213U - Instrument tube and endoscope - Google Patents

Abstract

The utility model is suitable for the technical field of endoscopes, and provides an instrument tube and an endoscope, wherein the instrument tube comprises an inner protection layer, a supporting layer and an outer protection layer, wherein the supporting layer is positioned between the inner protection layer and the outer protection layer; the distal end to the proximal end of the instrument tube are sequentially arranged into a bending section, an insertion section and a handle section, and the hardness of the insertion section is smaller than that of the bending section and that of the insertion section. According to the utility model, the instrument tube is provided with three layers, so that the shape of the instrument tube is kept unchanged and the instrument tube cannot collapse when the instrument tube is bent through the active bending section and the passive bending section.

Description

Instrument tube and endoscope

Technical Field

The utility model relates to an endoscope, in particular to an instrument tube and an endoscope.

Background

An endoscope is a commonly used medical instrument, which can directly enter a natural duct of a human body to be inspected, and can provide sufficient diagnostic information for doctors to treat diseases. When in use, the inserting part of the endoscope enters the human body through the natural pore canal of the human body or a small incision made by operation, and a doctor can directly peep the change of the relevant part. An instrument passage tube is arranged in the insertion part of the endoscope, an instrument inlet is arranged on a handle of the endoscope, and medical instruments (biopsy forceps, graspers, scissors and the like) can enter the instrument passage tube of the endoscope through the instrument inlet and enter a visual field, and biopsy sampling and the like are carried out through the medical instruments.

The instrument channel tube of the existing endoscope is only made of a common Teflon tube and is of a single-layer structure. The end part of the endoscope guide pipe is provided with an active bending section and a passive bending section, the bending angles of the two parts are the largest when the endoscope guide pipe enters a human body, and when the instrument pipe is of a single-layer structure, the instrument channel pipe cannot be smoothly bent at the active bending section and the passive bending section, or the instrument channel pipe is easy to collapse when being bent, so that instruments cannot pass through. In addition, at present, the hardness of the insertion tube of a plurality of endoscopes entering the human body is higher, so that certain difficulty is caused when the endoscope is inserted into the human body, and great discomfort is caused to a patient.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, it is an object of a first aspect of the present invention to provide a device tube, the device tube body including an inner sheath, a supporting layer and an outer sheath, the supporting layer being located between the inner sheath and the outer sheath;

the distal end to the proximal end of the instrument tube are sequentially arranged into a bending section, an insertion section and a handle section, and the hardness of the insertion section is smaller than that of the bending section and that of the insertion section.

Further, the material of the support layer is metal.

Further, the hardness of the supporting layer of the insertion section is smaller than that of the supporting layer of the bending section, and the hardness of the supporting layer of the bending section is smaller than that of the supporting layer of the handle section.

Furthermore, the supporting layer is spiral, the thread pitch of the supporting layer of the insertion section is larger than that of the supporting layer of the bending section, and the thread pitch of the supporting layer of the bending section is larger than that of the supporting layer of the handle section.

Furthermore, the supporting layer is in a net shape, the grid density of the supporting layer of the insertion section is smaller than that of the supporting layer of the bending section, and the grid density of the supporting layer of the bending section is smaller than that of the supporting layer of the handle section.

Further, the outer protective layer or the inner protective layer is made of one of TPE, TPU, PU, PTFE, LDPE, HDPE, PEBAX, PE, EVA, PVC and PET.

Further, the outer sheath is a heat shrink tube.

Further, the inner protection layer, the outer protection layer and the supporting layer are connected together by adopting an integral forming process.

Further, the hardness of the outer sheath of the insertion section is smaller than that of the outer sheath of the bending section, and the hardness of the outer sheath of the bending section is smaller than that of the outer sheath of the handle section.

It is an object of a second aspect of the present invention to provide an endoscope comprising a handle portion for controlling movement of an insertion portion and an insertion portion within which the aforementioned instrument tube is disposed.

Compared with the prior art, the utility model has the beneficial technical effects that:

1) compared with the prior art, the single-layer Teflon tube is usually adopted in the instrument tube in the prior art, the instrument tube cannot be smoothly bent in the active bending section and the passive bending section, or the instrument tube is easy to collapse when bent, so that the instrument cannot pass through the device tube.

2) The utility model discloses in the supporting layer that sets up play support, solid shape effect to the 10 bodys of apparatus pipe, its intensity that can strengthen the body of apparatus pipe, keep the body of apparatus pipe can not take place to sink under certain effort, buckle smoothly at initiative bending segment and passive bending segment like the apparatus pipe, and the apparatus in apparatus pipe 10 can be smoothly through getting into human inside.

3) In the utility model, in order to ensure the smoothness of the biopsy process and the accuracy of the result, the hardness of the insertion section is set to be the most flexible relative to the bending section and the handle section, so that when the insertion tube is placed in a human body, the human tissue contacted with the insertion tube cannot be extruded and the like due to the flexibility of the insertion tube, and the comfort of the human body is greatly improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or in the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic representation of an instrument according to the present invention;

FIG. 2 is a schematic cross-sectional view of an instrument tube according to the present invention;

FIG. 3 is a schematic view of the helix structure of the support layer of the present invention;

FIG. 4 is a schematic pitch diagram of the helical structure of the support layer in the present invention;

FIG. 5 is a schematic cross-sectional view of an outer jacket according to the present invention;

FIG. 6 is a schematic view of an endoscope in accordance with an embodiment of the present invention.

In the figure: 1-an insertion portion; 10-an instrument tube; 11-an inner sheath layer; 12-a support layer; 13-an outer protective layer; 131-an accommodating groove; 14-a curved section; 15-an insertion section; 16-a handle section; 2-handle part, 3-endoscope.

Detailed Description

The following description provides many different embodiments, or examples, for implementing different features of the utility model. The particular examples set forth below are illustrative only and are not intended to be limiting.

In the prior art, a conventional endoscope includes an operation portion (also referred to as a handle) and an insertion portion. The handle part is used for controlling the insertion part to enter a human body. The insertion part can be divided into an active bending section, a passive bending section and an insertion pipe section. The handle part drives the passive bending section to bend by controlling the bending of the active bending section, thereby realizing the direction control of the insertion part in the human body cavity.

Meanwhile, an instrument channel tube (instrument tube for short) is arranged in the insertion part of the endoscope, an instrument inlet is arranged on a handle of the endoscope, medical instruments (biopsy forceps, graspers, scissors and the like) can enter the instrument tube of the endoscope through the instrument inlet, a camera at the far end of the insertion part enters a visual field, and biopsy sampling and the like are carried out through the medical instruments.

An instrument channel tube of an existing endoscope is usually made of a single-layer teflon tube, wherein the teflon tube is a special tube made of polytetrafluoroethylene materials through processes of extrusion sintering, drying, high-temperature sintering, shaping and the like.

When an insertion part of the endoscope enters a human body, the bending angles of the active bending section and the passive bending section are the largest, when the instrument channel tube is of a single-layer structure, the instrument channel tube cannot be smoothly bent at the active bending section and the passive bending section, or the instrument channel tube is easy to collapse when being bent, so that an instrument cannot smoothly pass through.

And because the hardness of the insertion pipe section in the prior art is higher, the part of the insertion pipe section close to the active bending section and the passive bending section has certain difficulty when entering the human body, and can cause great discomfort for patients.

In addition, in the present invention, the "distal end" and the "proximal end" are both relative to the handle section of the endoscope, and the end closer to the handle section of the endoscope is referred to as the "proximal end" and the end farther from the handle section of the endoscope is referred to as the "distal end".

In view of this, one embodiment of the present invention, as shown in fig. 1-3, provides a device tube 10, wherein the tube body of the device tube 10 includes an inner sheath 11, a supporting layer 12 and an outer sheath 13, the supporting layer 12 is located between the inner sheath 11 and the outer sheath 13;

the instrument tube 10 is sequentially provided with a bending section 14, an insertion section 15 and a handle section 16 from the far end to the near end, wherein the hardness of the insertion section 15 is smaller than that of the bending section 14 and the handle section 16.

In the above scheme, the supporting layer 12 plays a role in supporting and fixing the body of the instrument tube 10, which can enhance the strength of the body of the instrument tube 10, and keep the body of the instrument tube 10 from collapsing under a certain action force, for example, the instrument tube 10 can be smoothly bent at the active bending section and the passive bending section, and instruments in the instrument tube 10 can smoothly enter the inside of a human body.

The prior art instrument tube 10 is mostly a single layer teflon tube. Unlike the prior art, the instrument tube 10 in this embodiment is provided with a multi-layer structure, and the support layer 12 is provided in this embodiment to enhance the rigidity of the tube body of the instrument tube, so that the tube body is not easy to collapse. Wherein, interior sheath 11 is located the inlayer of apparatus pipe body, and outer jacket 13 is located the outmost of apparatus pipe body, and supporting layer 12 is located between interior sheath 11 and outer jacket 13. The inner protection layer 11 and the outer protection layer 13 are connected in a sealing mode, so that the whole instrument tube 10 has high-level sealing performance, the supporting layer 12 is wrapped in the inner protection layer 11 and the outer protection layer 13 under the combined action of the inner protection layer and the outer protection layer, the supporting layer 12 cannot interact with the external environment, the supporting layer 12 is prevented from being oxidized, or foreign matters enter the supporting layer 12, the instrument tube 10 cannot smoothly enter a human body, and even the instrument tube 10 collapses and cannot smoothly pass through the instrument tube 10. In addition, since the whole instrument tube 10 has high sealing performance, and other fluids such as water cannot enter gaps and infiltrate into other layers of the pipeline in the process of passing through the instrument tube 10, the instrument tube 10 in the embodiment can also be used as functional components requiring a sealed environment such as a water inlet and outlet channel, thereby further widening the use scene of the instrument 10.

When inserting the instrument tube into the insertion portion of the endoscope, the instrument tube bends as it bends. Wherein, the instrument tube is divided into regions from the distal end to the proximal end, namely a bending section 14 (also called as a snake bone section), an inserting section 15 (a part between the snake bone section and the handle section), and a handle section 16 (a part connected near the handle end); when the instrument tube 10 is used for biopsy sampling of a human body, the bending section 14 needs to perform bending movements in different directions along with the snake bone in the human body, certain hardness is needed to enable the bending movement to be performed smoothly, and the instrument tube 10 cannot collapse in the bending process, so that the snake bone or an instrument cannot pass through or move normally; the insertion section 15 of the instrument tube 10 is usually placed in a human body after entering the human body, if the insertion section 15 is relatively hard, great discomfort can be caused to a patient, and further, the endoscope can be influenced when the human body is subjected to biopsy, in the embodiment, in order to ensure the smoothness of the biopsy process and the accuracy of the result, the hardness of the insertion section 15 is set to be most flexible relative to the bending section 14 and the handle section 16, so that when the insertion tube 15 is placed in the human body, due to the flexibility of the insertion tube, human tissues in contact with the insertion tube 15 cannot be squeezed and the like, and the comfort of the human body is greatly improved.

It should be noted that, both ends of the inner sheath 11 and both ends of the outer sheath 13 are hermetically connected, and the hermetically connected manner may be integrally formed, or may be implemented by other manners such as gluing, which is not limited herein.

Specifically, as shown in fig. 5, the outer protective layer 13 is tubular, an accommodating groove 131 is formed in the circumferential direction of the inner wall of the outer protective layer 13, two ends of the accommodating groove 131 do not exceed two ends of the outer protective layer 13, the accommodating groove 131 is used for accommodating the supporting layer 12, and the supporting layer 12 is fixed in the accommodating groove 131, on one hand, the accommodating groove 131 is arranged in order to better fix the supporting layer 12 between the inner protective layer 11 and the outer protective layer 13, so that the instrument tube 10 is not seriously deformed or collapsed in the using process, and the strength of the instrument tube 10 is ensured not to be changed in the using process; on the other hand, in order to prevent displacement between the support layer 12 and the inner and outer sheath layers 11, 13, or the support layer 12 slipping out of the instrument tube 10. In addition to the above solutions, there are other modifications, for example, a first receiving groove is formed on the inner wall of the outer sheath 13, a second receiving groove is formed on the outer surface of the inner sheath 11, the first receiving groove and the second receiving groove correspond in position, and the first receiving groove and the second receiving groove jointly form a receiving cavity for receiving the supporting layer 12, and a sum of depths of the first receiving groove and the second receiving groove is equal to a thickness of the supporting layer 12.

Compared with the prior art, the instrument tube provided by the utility model has the advantages that the instrument tube in the prior art usually adopts a single-layer Teflon tube, the instrument tube cannot be smoothly bent in the active bending section and the passive bending section, or the instrument tube is easy to collapse when being bent, so that the instrument cannot pass through the instrument tube.

Further, the material of the support layer 12 is metal.

In the above scheme, the material of the support layer 12 is metal, and the metal has a greater hardness than soft materials such as rubber, so that the instrument tube 10 can be better supported, the instrument tube 10 has sufficient strength, and the instrument tube 10 does not collapse when being bent, and an instrument can smoothly pass through the instrument tube, so as to smoothly perform operations such as biopsy sampling.

Preferably, the metal material of the support layer 12 is preferably one of stainless steel, nickel titanium, copper and aluminum, but other metal materials are also possible, and are not limited herein.

Further, the hardness of the support layer 12 of the insertion section 15 is less than that of the support layer 12 of the bending section 14, and the hardness of the support layer 12 of the bending section 14 is less than that of the support layer 12 of the handle section 16.

In the above solution, the supporting layer 12 is used to help the instrument tube 10 not collapse when bending, so the hardness of the supporting layer 12 needs to meet the hardness of the instrument tube at different positions, the supporting layer 12 at the bending section 14 needs to follow the snake bone to perform bending activities in different directions in the human body, and needs to have a certain hardness to enable the bending activities to be performed smoothly, and the handle section 16 is used to be connected with the handle, and needs to transmit the external force applied by the handle end to the insertion section 15 and the bending section, i.e. the handle section 16 is a main stressed section, so the hardness of the supporting layer 12 corresponding to the handle section 16 is the largest, the insertion section 15 is placed in one body, and in order to improve the comfort of the instrument tube after entering the human body, the supporting layer 12 corresponding to the insertion section 15 is the softest and the hardness is the smallest.

Further, the support layer 12 is helical, the pitch of the support layer 12 of the insertion section 15 is greater than the pitch of the support layer 12 of the bending section 14, and the pitch of the support layer 12 of the bending section 14 is greater than the pitch of the support layer 12 of the handle section 16.

Further, the supporting layer 12 is in a net shape, the lattice density of the supporting layer 12 of the insertion section 15 is smaller than that of the supporting layer 12 of the bending section 14, and the lattice density of the supporting layer 12 of the bending section 14 is smaller than that of the supporting layer 12 of the handle section 16.

In the above solution, as shown in fig. 4, in order to ensure the required rigidity of the support layer 12 located at different sections of the instrument tube 10, the support layer 12 is configured to be tubular, and the tubular shape is helical, and the pitch is easier to bend according to the helical property, and is more flexible, i.e. the pitch S2 of the support layer 12 at the insertion section 15 placed in the human body is the largest and the most flexible, and then the pitch S1 of the support layer in the bending section 14 located at the distal end is smaller than the pitch S2 of the support layer in the insertion section 15; finally, the proximal handle segment 16, which is connected to the handle, has the smallest pitch S2 and the largest stiffness S2> S1> S3, corresponding to the support layer 12.

Besides, the supporting layer 12 can be set to be tubular, the tubular shape is a net shape and is sleeved on the surface of the inner sheath layer 11, the hardness of the supporting layer 12 of the non-segment of the instrument tube 10 can be adjusted according to the size of the grid in the net shape, and the larger the grid is, the lower the hardness is, and the softer the grid is.

Further, the material of the outer sheath layer 13 or the inner sheath layer 11 is one of TPE, TPU, PU, PTFE, LDPE, HDPE, PEBAX, PE, EVA, PVC, and PET.

Further, the outer sheath 13 is a heat shrinkable tube.

In the above scheme, outer jacket 13 is used for protecting supporting layer 12 and inner sheath 11, selects outer jacket 13 to be the pyrocondensation pipe, and the material selects one of TPE, TPU, PU, PTFE, LDPE, HDPE, PEBAX, PE, EVA, PVC, PET for the outer jacket has soft fire-retardant, insulating anticorrosive effect simultaneously, and the outer jacket has sufficient compliance simultaneously, makes the corresponding position of the human entering that the apparatus pipe can be comfortable smoothly.

Optionally, the material of the inner sheath layer 11 is teflon tubing.

Further, the inner protective layer 11, the outer protective layer 13 and the supporting layer 12 are connected together by an integral molding process.

In the above scheme, the inner protection layer 11, the support layer 12 and the outer protection layer 13 can be integrated by injection molding, and the three layers do not move but move as a whole. And when the three are integrally formed, the whole instrument tube 10 has high-grade tightness, and then under the combined action of the inner protective layer 11 and the outer protective layer 13, the supporting layer 12 is wrapped in the inner protective layer, so that the supporting layer 12 cannot interact with the external environment, the supporting layer 12 is prevented from being oxidized, or foreign matters enter the supporting layer 12, the process that the instrument tube 10 enters a human body is not smooth, even the instrument tube 10 collapses, and the instrument cannot smoothly pass through the instrument tube 10. In addition, because the whole instrument tube 10 has high sealing performance, and other fluids such as water cannot enter gaps and infiltrate into other layers of the pipeline in the process of passing through the instrument tube 10, the instrument tube 10 in the embodiment can also be used as other functional components needing sealed environment such as water inlet and outlet channels, and the use scene of the instrument tube 10 is further widened.

In addition, the inner protection layer and the outer protection layer are longer at two ends and are left at two ends of the supporting layer, so that when the inner protection layer, the outer protection layer and the supporting layer are integrally formed, the outer protection layer can partially penetrate into a gap of the supporting layer, the inner protection layer and the outer protection layer at two ends of the supporting layer are directly bonded together, and the supporting layer is completely wrapped between the inner protection layer and the outer protection layer.

Further, the hardness of the outer sheath 13 of the insertion section 15 is less than that of the outer sheath 13 of the bending section 14, and the hardness of the outer sheath 13 of the bending section 14 is less than that of the outer sheath 13 of the handle section 16.

In the above scheme, the outer protection layer 13, the inner protection layer 11 and the support layer 12 need to be matched with each other, that is, the hardness of the three needs to be matched for setting, wherein the insertion section 15 needs to be placed inside a human body and needs to be the softest, and the outer protection layer 13 at the corresponding position also needs to be very soft; the handle section 16 needs to transmit the external force of the handle to the distal end, and the hardness needs to be the greatest, so the hardness of the outer sheath 13 at the corresponding position needs to be greater than the hardness of the outer sheath 13 corresponding to the insertion section 15 and the bending section 14.

Example two:

as shown in fig. 6, a second object of the embodiment of the present invention is to provide an endoscope, which includes a handle portion 2 and an insertion portion 1, wherein the handle portion 2 is used for controlling the movement of the insertion portion 1, and the insertion portion 1 is provided with the above-mentioned instrument tube therein.

In the above scheme, the insertion portion of the endoscope 3 is provided with the instrument tube 10 with a three-layer structure, so that the endoscope 3 can smoothly enter the focus position of a patient during operations such as biopsy sampling, pain of the patient is reduced, and experience of the patient is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A device tube, characterized in that the body of the device tube (10) comprises an inner sheath (11), a supporting layer (12) and an outer sheath (13), the supporting layer (12) being located between the inner sheath (11) and the outer sheath (13);

the method comprises the steps of sequentially arranging a bending section (14), an inserting section (15) and a handle section (16) from the far end to the near end of the instrument tube (10), wherein the hardness of the inserting section (15) is smaller than that of the bending section (14) and the handle section (16).

2. The instrument tube according to claim 1, characterized in that the material of the support layer (12) is metal.

3. The instrument tube according to claim 2, characterized in that the hardness of the supporting layer (12) of the insertion section (15) is lower than the hardness of the supporting layer (12) of the bending section (14), the hardness of the supporting layer (12) of the bending section (14) being lower than the hardness of the supporting layer (12) of the handle section (16).

4. Device tube according to claim 3, characterized in that the support layer (12) is helical, the pitch of the support layer (12) of the insertion section (15) being greater than the pitch of the support layer (12) of the bending section (14), the pitch of the support layer (12) of the bending section (14) being greater than the pitch of the support layer (12) of the handle section (16).

5. The instrument tube of claim 3, said support layer (12) being reticulated, a lattice density of the support layer (12) of said insertion section (15) being less than a lattice density of the support layer (12) of said bending section (14), a lattice density of the support layer (12) of said bending section (14) being less than a lattice density of the support layer (12) of said handle section (16).

6. Device tube according to claim 2, characterized in that the material of the outer sheath (13) or the inner sheath (11) is one of TPE, TPU, PU, PTFE, LDPE, HDPE, PEBAX, PE, EVA, PVC, PET.

7. The instrument tube of claim 6, wherein the outer sheath (13) is a heat shrink tube.

8. The device tube according to claim 7, characterized in that the inner sheath (11), the outer sheath (13) and the supporting layer (12) are joined together in an integral molding process.

9. The instrument tube according to one of claims 1 to 8, characterized in that the outer sheath (13) of the insertion section (15) has a hardness which is less than the hardness of the outer sheath (13) of the bending section (14), the outer sheath (13) of the bending section 14 having a hardness which is less than the hardness of the outer sheath (13) of the handle section (16).

10. An endoscope, characterized by comprising a handle portion (2) and an insertion portion (1), the handle portion (2) being adapted to control the movement of the insertion portion (1), the insertion portion (1) being provided with an instrument tube (10) according to any of claims 1-9.

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