Endoscope insertion part and medical endoscope

Abstract

The utility model provides an endoscope insertion part and a medical endoscope. The endoscope insertion part and the medical endoscope can solve the problem that in the prior art, a forceps channel cavity instrument is poor in trafficability. The endoscope insertion part comprises: an insertion part main body for extending forward from an operation part, the insertion part main body comprising a multi-cavity catheter having a forceps channel cavity and a front end part provided at a front end side of the multi-cavity catheter, the front end part having a forceps channel hole communicating with the forceps channel cavity; and the Teflon tube is provided with a fixed end part which is fixedly connected with the operation part, a free end part which can movably extend into the clamp channel hole, and a tube body part which extends from the fixed end part to the free end part along the clamp channel cavity.

Description

Technical Field

[0001] The present application relates to the technical field of endoscopes, and in particular to an endoscope insertion portion and a medical endoscope. Background Art

[0002] In recent years, with the development of minimally invasive endoscopic diagnosis and treatment technology, many diseases can enter the human body through natural orifices or surgical incisions for minimally invasive diagnosis and treatment. At present, the use of endoscopes has gradually been recognized by the market. They are usually divided into soft and hard endoscopes. Soft endoscopes enter the human body through natural cavities, such as digestive tract endoscopes, choledochoscopes or bronchoscopes. In addition, there are both soft and hard endoscopes that enter the human body through relatively short and straight natural cavities such as the ear, nose, throat, ureter, bladder or uterine cavity.

[0003] An existing soft endoscope usually has an insertion portion for inserting into a body cavity and an operating portion connected to the rear end side of the insertion portion. The insertion portion has a flexible portion, a bending portion connected to the front end side of the flexible portion, and a front end portion connected to the front end side of the bending portion, and the front end portion has a built-in imaging element for imaging a portion within the body cavity; the operating portion is used to control the bending operation of the bending portion by pulling a traction wire.

[0004] However, the insertion part of existing soft endoscopes is mostly a soft multi-lumen catheter, whose clamp channel cavity needs to pass instruments such as sampling forceps or electrodes; but the wall of the clamp channel cavity is usually not smooth enough, resulting in poor passability of instruments. Utility Model Content

[0005] The utility model aims to provide an endoscope insertion portion and a medical endoscope, which can solve the problem of poor passability of instruments in the forceps channel cavity in the prior art.

[0006] In order to solve the above technical problems, the embodiment of the utility model discloses an endoscope insertion part, which is used to connect the operation part, including:

[0007] An insertion portion body extending forward from the operation portion includes a multi-lumen catheter having a clamp channel cavity and a front end portion disposed at the front end side of the multi-lumen catheter, the front end portion having a clamp channel hole communicating with the clamp channel cavity; and

[0008] The Teflon tube comprises a fixed end portion for fixedly connecting with the operating portion, a free end portion movably extending into the clamp channel hole, and a tube body portion extending from the fixed end portion along the clamp channel cavity to the free end portion.

[0009] By adopting the above technical solution, when the multi-lumen catheter in the endoscope insertion part is bent under the control of the operating part, the Teflon tube in the clamp channel cavity will not be wrinkled due to axial compression, so as to ensure better instrument passability.

[0010] According to one embodiment of the present application, when the multi-lumen catheter is bent to a maximum angle, the free end of the Teflon tube is still located within the clamp channel hole of the front end portion.

[0011] The above technical solution is adopted to prevent the Teflon tube from extending out of the clamp channel hole and blocking the endoscope field of view or affecting the operation of the instrument.

[0012] According to one embodiment of the present application, the endoscope insertion portion further includes an elastic tube sleeved outside the Teflon tube.

[0013] The above technical solution is adopted to improve the anti-bending performance of the curved section in the endoscope insertion part, prevent the multi-lumen catheter of the insertion part body from bending and thus cause the Teflon tube to also bend, avoiding the problem of poor instrument passability.

[0014] According to an embodiment of the present application, the front end of the elastic tube is fixedly connected to the front end of the insertion body, and the rear end of the elastic tube extends along the Teflon tube.

[0015] By adopting the above technical solution, the elastic tube can support the Teflon tube, which helps to reduce the bending radius of the endoscope insertion part and improve the anti-bending performance.

[0016] According to one embodiment of the present application, the elastic tube is inserted into the clamp channel lumen of the multi-lumen catheter.

[0017] The above technical solution is adopted to improve the bending resistance of the endoscope insertion portion and help reduce the outer diameter of the endoscope insertion portion.

[0018] According to an embodiment of the present application, the elastic tube is one of a flat reed tube, a round reed tube and a mesh tube.

[0019] According to one embodiment of the present application, the front end portion includes a front end base providing the clamp channel hole, a lens module, a sleeve and a limiting boss installed on the front end base; the distal end of the sleeve is sleeved on the front end base, and the proximal end of the sleeve is sleeved on the multi-lumen catheter; the limiting boss is arranged on the front end base and is located at the opening of the clamp channel hole, and the front end surface of the elastic tube abuts against the limiting boss.

[0020] The above technical solution is adopted to resist the axial elastic force of the elastic tube, so as to better fix the elastic tube firmly to the front end portion by gluing.

[0021] According to one embodiment of the present application, the rear end of the elastic tube freely extends into the clamp channel cavity.

[0022] By adopting the above technical solution, the rear end of the elastic tube is formed into a free end, which is convenient for disassembling or replacing the elastic tube and helps to reduce the maintenance cost.

[0023] According to one embodiment of the present application, the insertion portion body further includes a limit block protruding from the multi-lumen catheter and located within the clamp channel cavity, and the rear end surface of the elastic tube abuts against the limit block.

[0024] The above technical solution is adopted to adjust the tightness of the elastic tube by replacing elastic tubes of different lengths, thereby controlling the anti-bending performance of the endoscope insertion portion to be maintained within a certain range or degree.

[0025] According to another aspect of the present application, the present application further provides a medical endoscope, comprising:

[0026] An endoscope insertion portion as described in any one of the above; and

[0027] The operating part is connected to the rear end of the insertion part. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A three-dimensional schematic diagram of a medical endoscope provided for one embodiment of the present application;

[0030] Figure 2 Shows Figure 1 An enlarged schematic diagram of a part A in a medical endoscope is shown;

[0031] Figure 3 A cross-sectional schematic diagram of an endoscope insertion portion in a medical endoscope according to the above embodiment of the present application is shown;

[0032] Figure 4 Shows Figure 3 An enlarged schematic diagram of a part B in the insertion portion of the endoscope is shown;

[0033] Figure 5 A first modified example of the endoscope insertion portion according to the above-described embodiment of the present application is shown;

[0034] Figure 6 A second modified example of the endoscope insertion portion according to the above-described embodiment of the present application is shown.

[0035] Figure numerals: 1. endoscope insertion part; 10. insertion part body; 11. multi-lumen catheter; 110. clamp channel cavity; 12. front end; 120. clamp channel hole; 121. front end base; 122. lens module; 123. sleeve; 124. limiting boss; 13. limiting block; 20. Teflon tube; 21. fixed end; 22. free end; 23. tube body; 30. elastic tube; 31. flat spring tube; 32. round spring tube; 2. operating part. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0037] In the description of the embodiments of the present application, it should be noted that the terms "front" or "far", "back" or "near" are relative positional relationships. When an operator operates an instrument to process a target object, along the instrument, the end closer to the operator is the "back" or "near", and the end closer to the target object is the "front" or "far".

[0038] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one feature. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0042] Considering that the existing soft endoscope insertion part is mostly a soft multi-lumen catheter, its clamp channel cavity needs to pass instruments such as sampling forceps or electrodes; however, the clamp channel cavity wall is usually not smooth enough, resulting in poor instrument passability. In order to solve this problem, the present application provides an endoscope insertion part and a medical endoscope, which can solve the problem of poor instrument passability of the clamp channel cavity in the prior art.

[0043] Specifically, see Figures 1 to 4 An embodiment of the present application provides a medical endoscope, which may include an endoscope insertion portion 1 and an operating portion 2 connected to the rear end of the endoscope insertion portion 1 so as to control the bending operation of the endoscope insertion portion 1 through the operating portion 2.

[0044] More specifically, if Figure 1 and Figure 2 As shown, the endoscope insertion part 1 may include an insertion part body 10 and a Teflon tube 20 extending forward from the operating part 2. The insertion part body 10 includes a multi-lumen catheter 11 having a clamp channel cavity 110 and a front end portion 12 arranged on the front end side of the multi-lumen catheter 11, and the front end portion 12 has a clamp channel hole 120 connected to the clamp channel cavity 110. The Teflon tube 20 has a fixed end 21 fixedly connected to the operating part 2 and a free end 22 that can be movably extended into the clamp channel hole 120, and a tube body 23 extending from the fixed end 21 along the clamp channel cavity 110 to the free end 22. It can be understood that the Teflon tube 20 mentioned in the present application can be implemented as a tube made of Teflon material, and can also be implemented as a tube with a Teflon coating on the inner wall, as long as the inner wall of the tube is super-smooth, and this application will not repeat it.

[0045] Preferably, when the multi-lumen catheter 11 in the endoscope insertion portion 1 is bent to the maximum angle, the free end 22 of the Teflon tube 20 is still located within the clamp channel hole 120 of the front end portion 12 to prevent the Teflon tube 20 from extending out of the clamp channel hole 120 and blocking the endoscope field of view or affecting the operation of the instrument.

[0046] It is worth noting that, since the free end 22 of the Teflon tube 20 in the endoscope insertion part 1 of the present application can be movably extended into the clamp channel hole 120, that is, the free end 22 of the Teflon tube 20 is not fixedly connected to the front end 12, when the multi-lumen catheter 11 in the endoscope insertion part 1 is bent under the control of the operating part 2, the Teflon tube 20 in the clamp channel cavity 110 will not be axially squeezed to cause wrinkles, so as to ensure better instrument passability. It is understandable that if the two ends of the Teflon tube 20 are fixedly connected to the operating part 2 and the front end 12 respectively, when the insertion part body 10 is bent, the Teflon tube 20 will be axially squeezed by the front end 12 and the operating part 2 to cause wrinkles.

[0047] In addition, although the inner hole wall of the Teflon tube 20 is super smooth, its material is relatively expensive. If the multi-lumen catheter 11 of the insertion body 10 is made entirely of Teflon material, the cost will be high and it is not suitable for making disposable endoscopes. Therefore, the multi-lumen catheter 11 of the insertion body 10 of the present application is mostly made of nylon elastic material (Pebax material), polyamide material (PA material) or a composite material thereof, which has a lower cost.

[0048] In other words, the endoscope insertion part 1 of the present application cancels the fixed connection between the Teflon tube 20 and the front end 12, so that the free end 22 of the Teflon tube 20 is in a free state, and there will be no wrinkle problem caused by the axial compression of the Teflon tube 20. However, if the outer wall of the multi-lumen catheter 11 of the insertion part body 10 is not sheathed with a spring, the bending strength of the bending part of the multi-lumen catheter 11 of the insertion part body 10 is poor. When the bending part of the multi-lumen catheter 11 of the insertion part body 10 is bent at a large angle, it is easy to bend, which in turn causes the Teflon tube 20 to be easily bent, affecting the passability of the instrument. In addition, if a spring tube is sheathed on the outer wall of the multi-lumen catheter 11, an additional coating layer needs to be provided, which is easy to cause the outer diameter of the endoscope insertion part 1 to become larger, causing the endoscope insertion part 1 to be unable to normally enter a narrow body cavity channel such as a duodenoscope.

[0049] To solve this problem, Figures 2 to 4As shown, the endoscope insertion portion 1 of the present application may further include an elastic tube 30 sleeved outside the Teflon tube 20 to improve the bending resistance of the curved section in the endoscope insertion portion 1, prevent the multi-lumen catheter 11 of the insertion portion body 10 from bending and thereby cause the Teflon tube 20 to also bend, thereby avoiding the problem of poor instrument passability.

[0050] Alternatively, if Figure 3 As shown, the front end of the elastic tube 30 is fixedly connected to the front end 12 of the insertion part body 10, and the rear end of the elastic tube 30 extends along the Teflon tube 20 to support the Teflon tube 20, which helps to improve the anti-bending performance of the Teflon tube 20. It can be understood that the front end of the elastic tube 30 of the present application can be fixed to the front end 12 of the insertion part body 10 by glue, but is not limited to it.

[0051] Alternatively, if Figure 2 and Figure 4 As shown, the elastic tube 30 is installed in the clamp channel cavity 110 of the multi-lumen catheter 11, so as to improve the anti-bending performance of the endoscope insertion part 1 and help reduce the outer diameter of the endoscope insertion part 1. It can be understood that if the elastic tube 30 is not directly installed in the clamp channel cavity 110 of the multi-lumen catheter 11, but the elastic tube 30 is directly welded to the outer wall of the multi-lumen catheter 11, an additional coating layer is required on the outer side of the elastic tube 30, which is likely to increase the outer diameter of the endoscope insertion part 1, causing the endoscope insertion part 1 to be unable to normally enter a narrow body cavity such as a duodenoscope.

[0052] For example, Figures 1 to 4 As shown, the elastic tube 30 can be implemented as a flat spring tube 31 so as to make surface contact with the Teflon tube 20 , which helps to further improve the anti-bending effect of the endoscope insertion part 1 .

[0053] It is worth noting that in the first variant example of the present application, Figure 5 As shown, the elastic tube 30 can also be implemented as a round spring tube 32, which, although in line contact with the Teflon tube 20, can also improve the anti-bending effect of the endoscope insertion portion 1 to a certain extent. In addition, in other examples of the present application, the elastic tube 30 can also be implemented as a mesh tube such as a mesh braid, as long as it has a certain hardness and resilience, and the present application will not repeat it.

[0054] Optionally, the spring pitch of the circular reed tube 32 is 0.16 mm; the spring diameter of the circular reed tube 32 is 0.08 mm, so as to provide appropriate resilience and ensure that the endoscope insertion part 1 has good bending performance and anti-bending performance.

[0055] According to the above embodiments of the present application, Figure 2 and Figure 3 As shown, the front end portion 12 may include a front end base 121 providing the clamp hole 120, a lens module 122 mounted on the front end base 121, and a sleeve 123, the distal end of the sleeve 123 is sleeved on the front end base 121, and the proximal end of the sleeve 123 is sleeved on the multi-lumen catheter 11, so that the front end portion 12 is installed on the front end side of the multi-lumen catheter 11. It can be understood that the lens module 122 mentioned in the present application can be implemented as a camera module that is communicably connected to the operating part 2, but is not limited to, so as to convert image information (i.e., optical signal) into an electrical signal and then transmit it to the operating part 2, and can also be implemented as an optical lens connected to the operating part 2 by an optical fiber, so as to directly transmit the optical signal to the operating part 2, and then perform imaging display.

[0056] Alternatively, if Figure 2 and Figure 3 As shown, the front end portion 12 further includes a limiting boss 124 disposed on the front end base 121 and located at the opening of the clamp hole 120, and the front end surface of the elastic tube 30 abuts against the limiting boss 124, so that the elastic tube 30 is firmly fixed to the front end portion 12 by glue bonding. It can be understood that the present application can apply glue between the outer wall of the elastic tube 30 and the inner wall of the clamp hole 120 to achieve the effect of bonding and fixing the front end of the elastic tube 30 to the front end base 121.

[0057] It is worth noting that in the above example of the present application, the rear end of the elastic tube 30 freely extends into the clamp channel cavity 110 of the multi-lumen catheter 11, so that the rear end of the elastic tube 30 forms a free end, which is convenient for disassembly or replacement of the elastic tube 30, helping to reduce maintenance costs.

[0058] Of course, in the second variant example of the present application, Figure 6 As shown, the insertion part body 10 may further include a stopper 13 protruding from the multi-lumen catheter 11 and located within the clamp channel cavity 110, and the rear end surface of the elastic tube 30 abuts against the stopper 13, so that the anti-bending performance of the endoscope insertion part 1 can be controlled within a certain range or degree. It is understandable that the present application can adjust the tightness of the elastic tube 30 by replacing the elastic tube 30 of different lengths, and control the anti-bending performance of the endoscope insertion part 1 to be maintained within a certain range or degree.

[0059] Alternatively, if Figure 6 As shown, the limit block 13 extends obliquely forward from the inner wall of the clamp channel cavity 110 to form a slope, so as to ensure that the limit block 13 can reliably abut the rear end surface of the elastic tube 30 while avoiding adverse effects on the passage of instruments.

[0060] In addition, the multi-lumen catheter 11 mentioned in the present application can provide, in addition to the clamp channel cavity 110, cavities such as a traction cavity for passing a traction wire or a perfusion cavity for perfusing a cleaning solution; accordingly, the front end portion 12 is provided with a channel connected to the corresponding cavity, which will not be described in detail in the present application.

[0061] The technical features of the above embodiments can be combined without changing the basic principle of the present invention. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. Endoscope insertion part, used to connect the operating part, characterized in that: include: An insertion portion body extending forward from the operating portion includes a multi-lumen catheter having a clamp channel cavity and a front end portion provided at the front end side of the multi-lumen catheter, the front end portion having a clamp channel hole communicating with the clamp channel cavity; and The Teflon tube comprises a fixed end portion for fixedly connecting with the operating portion, a free end portion movably extending into the clamp channel hole, and a tube body portion extending from the fixed end portion along the clamp channel cavity to the free end portion.

2. The endoscope insertion portion according to claim 1, wherein: When the multi-lumen catheter is bent to a maximum angle, the free end of the Teflon tube is still located within the clamp hole of the front end portion.

3. The endoscope insertion portion according to claim 1 or 2, characterized in that: It also includes an elastic tube which is sleeved outside the Teflon tube.

4. The endoscope insertion portion according to claim 3, wherein: The front end of the elastic tube is fixedly connected to the front end portion of the insertion portion body, and the rear end of the elastic tube extends along the Teflon tube.

5. The endoscope insertion portion according to claim 4, characterized in that The elastic tube is inserted into the clamp channel lumen of the multi-lumen catheter.

6. The endoscope insertion portion according to claim 3, wherein: The elastic tube is one of a flat reed tube, a round reed tube and a mesh tube.

7. The endoscope insertion portion according to claim 3, wherein: The front end portion includes a front end base providing the clamp channel hole, a lens module, a sleeve and a limiting boss installed on the front end base; the distal end of the sleeve is sleeved on the front end base, and the proximal end of the sleeve is sleeved on the multi-lumen catheter; the limiting boss is arranged on the front end base and is located at the opening of the clamp channel hole, and the front end surface of the elastic tube abuts against the limiting boss.

8. The endoscope insertion portion according to claim 4, wherein: The rear end of the elastic tube freely extends into the clamp channel cavity.

9. The endoscope insertion portion according to claim 4, wherein: The inserting portion body further includes a limiting block protruding from the multi-lumen catheter and located within the clamp channel cavity, and the rear end surface of the elastic tube abuts against the limiting block.

10. A medical endoscope, characterized in that: include: The endoscope insertion portion according to any one of claims 1 to 9; and The operating portion is connected to the rear end of the insertion portion.

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