Endoscope catheter

Abstract

The present disclosure relates to the field of medical device technology, and in particular, to an endoscope catheter. In the endoscope catheter provided by the embodiments of the present disclosure, by disposing a coating region and a transition region on a surface of a catheter body and disposing a hydrophilic coating in the coating region, a stable hydrogel film is formed on the surface of the coating region of the catheter body. After being activated by normal saline, the hydrophilic coating exhibits good lubricity, flexibility, and adhesion. Moreover, the hydrophilic coating is only applied to the coating region of the catheter body but not to the transition region, which effectively prevents the hydrophilic coating from entering the interior of the catheter body through a connection gap between the catheter body and a catheter front end during the application and thus affecting normal use. The present disclosure alleviates the technical problem of excessive friction between the existing endoscope catheters and human tissues in the prior art.

Description

Endoscope catheter

[0001] Cross Reference to Related Applications

[0002] The present disclosure claims priority to the Chinese patent application No. 2024210980344, filed on May 17, 2024, and entitled “Endoscope catheter”, the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of medical devices, and particularly to an endoscope catheter. BACKGROUND

[0004] There are different types of endoscopes, including gastroscopes, enteroscopes, bronchoscopes, cystoscopes, laparoscopes, etc. With the development of the endoscope industry, it is required that the endoscope catheter can smoothly enter deeper and thinner cavities.

[0005] The existing endoscope catheter is difficult to operate in the clinic to enter the human body deeper, which means that the catheter is longer, and the longer the surface friction is greater, and the friction with the human tissue is greater.

[0006] DISCLOSURE

[0007] The purpose of the present disclosure is to provide an endoscope catheter to alleviate the technical problem of greater friction between the existing endoscope catheter and human tissue in the prior art.

[0008] The endoscope catheter provided by the present disclosure comprises a catheter member and a hydrophilic coating.

[0009] The catheter member comprises a catheter tip and a catheter body.

[0010] The catheter tip is connected to the proximal end of the catheter body.

[0011] The outer surface of the catheter body has a coating area and a transition area, and the transition area is located between the coating area and the catheter tip.

[0012] The hydrophilic coating is arranged in the coating area, and the hydrophilic coating is configured to reduce surface friction.

[0013] Optionally,

[0014] The hydrophilic coating comprises a bottom layer and a surface layer.

[0015] The bottom layer is coated on the outer surface of the catheter body, and the surface layer is coated on the bottom layer.

[0016] Optionally,

[0017] The surface layer is coated on the primer layer and cured after the primer layer is cured on the surface substrate of the catheter body.

[0018] Optionally,

[0019] The material of the primer layer is a mixture of solvent ethanol and photoinitiator dimethyl benzoin ethyl ether.

[0020] The material of the surface layer is a mixture of solvent ethanol and polyvinylpyrrolidone.

[0021] Optionally,

[0022] The catheter front end comprises a front end body and a connecting ring.

[0023] One end surface of the connecting ring is connected with the front end body, and the opposite end surface of the connecting ring is connected with the catheter body.

[0024] Optionally,

[0025] The catheter body comprises a hard section and a soft section.

[0026] One end of the soft section is connected with the catheter front end, and the other end of the soft section is connected with the hard section.

[0027] Optionally,

[0028] The catheter body further comprises a connecting tube.

[0029] One end surface of the connecting tube is connected with the hard section, and the other end surface of the connecting tube is connected with the soft section.

[0030] Optionally,

[0031] The endoscope catheter further comprises a lumen tube.

[0032] The lumen tube is arranged in the inner cavity of the catheter body, and the outer wall of the lumen tube abuts against the inner wall of the catheter body.

[0033] Optionally,

[0034] The inside of the lumen tube is provided with a traction channel penetrating in the length direction, and the traction channel is configured for the traction line to pass through.

[0035] Optionally,

[0036] The inside of the lumen tube is provided with a module channel penetrating in the length direction, and the module channel is configured for the camera and its cable optical fiber to pass through.

[0037] The inside of the lumen tube is provided with a liquid injection lumen penetrating in the length direction, and the liquid injection lumen is configured for liquid to pass through to flush away the obstacles blocking the field of view of the camera during the operation.

[0038] Optionally,

[0039] The cavity tube is provided with an instrument cavity along the length direction, and the instrument cavity is configured to pass through the surgical instrument.

[0040] Optionally,

[0041] The length of the coating area is 1mm-500m.

[0042] The endoscope catheter provided by the embodiment of the present disclosure forms a stable water film on the surface of the coating area of the catheter body by arranging the coating area and the transition area on the surface of the catheter body and arranging the hydrophilic coating in the coating area, the hydrophilic coating has good lubricity, softness and firmness after being activated by physiological saline, and since the hydrophilic coating is only coated on the coating area of the catheter body, the transition area does not have the hydrophilic coating, which effectively avoids the situation that the hydrophilic coating enters the inside of the catheter body at the connection gap between the hydrophilic coating catheter body and the front end of the catheter during coating of the hydrophilic coating, thereby affecting normal use, and the technical problem that the existing endoscope catheter has a large friction with human tissues is alleviated. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the specific embodiments of the present disclosure or the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art without creative labor.

[0044] FIG. 1 is a schematic diagram of the overall structure of the endoscope catheter provided by the embodiment of the present disclosure;

[0045] FIG. 2 is a schematic diagram of the structure of the catheter member in the endoscope catheter provided by the embodiment of the present disclosure;

[0046] FIG. 3 is a schematic diagram of the cross section of the hydrophilic coating in the endoscope catheter provided by the embodiment of the present disclosure;

[0047] FIG. 4 is a schematic diagram of the cross section of A-A in FIG. 2.

[0048] FIG. 1 is a schematic diagram of the overall structure of the endoscope catheter provided by the embodiment of the present disclosure; DETAILED DESCRIPTION

[0049] The technical solutions of the present disclosure will be described clearly and completely in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present disclosure.

[0050] In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present disclosure. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0051] In the description of the present disclosure, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0052] The specific embodiments of the present disclosure will be described in detail below in conjunction with the drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure.

[0053] As shown in FIG. 1 and FIG. 2, the endoscope catheter provided by the embodiments of the present disclosure comprises a catheter member 100 and a hydrophilic coating 200; the catheter member 100 comprises a catheter front end 110 and a catheter main body 120; the catheter front end 110 is connected to the proximal end of the catheter main body 120. It should be noted that the distal end is the end of the endoscope catheter inserted into the human body, and the proximal end is the end of the endoscope catheter away from the human body.

[0054] The outer surface of the catheter main body 120 has a coating area and a transition area 130, the transition area 130 is located between the coating area and the catheter front end 110, the hydrophilic coating 200 is arranged in the coating area, and the transition area 130 does not have the coating area. The hydrophilic coating 200 is configured to reduce surface friction. The hydrophilic coating 200 will be activated when it contacts physiological saline, increasing the thickness of the hydrophilic coating 200, making the hydrophilic coating 200 more lubricious.

[0055] As shown in Fig. 3, optionally, the hydrophilic coating 200 comprises a bottom layer 210 and a surface layer 220; the bottom layer 210 is coated on the outer surface of the catheter body 120, and the surface layer 220 is coated on the bottom layer 210.

[0056] Specifically, the bottom layer 210 is first coated on the catheter body 120, and then the surface layer 220 is coated on the bottom layer 210 after the bottom layer 210 is solidified. After the surface layer 220 is solidified, the hydrophilic coating 200 is formed on the catheter body 120. The advantages of solidifying the bottom layer 210 and the surface layer 220 respectively are that they are more stable and less likely to fall off.

[0057] Optionally, the material of the bottom layer 210 is a mixture of solvent ethanol and photoinitiator dimethyl benzophenone; the material of the surface layer 220 is solvent ethanol and polyvinylpyrrolidone; and the substrate of the catheter body 120 is selected from polyether block polyamide material, which has good resilience and elastic recovery.

[0058] It should be noted that the hydrophilic coating 200 is only coated on the coating area. During the coating process of the hydrophilic coating 200, the catheter front end 110 is first wrapped to prevent the hydrophilic coating 200 from contacting the transition area 130 and the catheter front end 110, and to prevent the hydrophilic coating 200 from entering the inside of the catheter body 120 from the joint gap between the catheter body 120 and the catheter front end 110.

[0059] In addition, the endoscope catheter provided by the embodiment can be matched with a duodenoscope. The length of the hydrophilic coating 200 in the coating area ranges from 1 mm to 500 mm, and is preferably 300 mm.

[0060] The catheter front end 110 comprises a front end body 111 and a connecting ring 112. One end surface of the connecting ring 112 is connected with the front end body 111, and the opposite end surface of the connecting ring 112 is connected with the catheter body 120.

[0061] The connecting ring 112 has a ring structure, and the two side end surfaces of the connecting ring 112 are connected with the front end body 111 and the catheter body 120 respectively. The end of the front end body 111 is arc-shaped. In use, the front end body 111 is first inserted into the human body, and then the catheter body 120 is inserted into the human body.

[0062] The endoscope catheter provided by the embodiment is provided with a coating area and a transition area 130 on the surface of the catheter main body 120, and a hydrophilic coating 200 is arranged in the coating area, so that a stable water film is formed on the surface of the coating area of the catheter main body 120, the hydrophilic coating 200 has good lubricity, softness and firmness after being activated by normal saline, and since the hydrophilic coating 200 is only coated on the coating area of the catheter main body 120, the transition area 130 does not have the hydrophilic coating 200, so that the hydrophilic coating 200 is effectively prevented from entering the inside of the catheter main body 120 at the connecting gap between the catheter main body 120 and the catheter front end 110 during coating, and the normal use is affected, and the technical problem of the existing endoscope catheter that has a large friction with human tissues is solved.

[0063] On the basis of the above-mentioned embodiment, optionally, the catheter main body 120 in the endoscope catheter provided by the embodiment comprises a hard section 121 and a soft section 122; one end of the soft section 122 is connected with the catheter front end 110, and the other end of the soft section 122 is connected with the hard section 121.

[0064] Optionally, the catheter main body 120 is divided into the hard section 121 and the soft section 122 which are different in hardness, the soft section 122 is connected with the catheter front end 110 through the connecting ring 112, and the hard section 121 is connected with the end of the soft section 122 which is away from the connecting ring 112, in use, the soft section 122 is first inserted into the human body, the elasticity and the bending property of the soft section 122 are better, the soft section 122 is more easily bent in the human body, and the hard section 121 is configured to be used for the operator to exert an insertion force, so that the whole endoscope catheter is more easily inserted into the human body.

[0065] Optionally, the catheter main body 120 further comprises a connecting pipe 140; one end surface of the connecting pipe 140 is connected with the hard section 121, and the other end surface of the connecting pipe 140 is connected with the soft section 122.

[0066] Specifically, the connecting pipe 140 is a cylindrical structure, the two end surfaces of the connecting pipe 140 are connected with the hard section 121 and the soft section 122 respectively, and the connecting pipe 140 is used to connect the hard section 121 and the soft section 122 as a whole.

[0067] In addition, the connecting pipe 140, the hard section 121 and the soft section 122 can be connected to form the catheter main body 120 by means of heat melting.

[0068] As shown in FIG. 4, optionally, the endoscope catheter further comprises a lumen pipe 300; the lumen pipe 300 is arranged in the inner cavity of the catheter main body 120, and the outer wall of the lumen pipe 300 abuts against the inner wall of the catheter main body 120.

[0069] Optionally, the catheter body 120 and the cavity tube 300 are heat-shrunk, the catheter body 120 is sleeved on the outer surface of the cavity tube 300, and the cavity tube 300 is internally provided with a plurality of chambers penetrating in the length direction, and the specific number and specific function of the chambers are selected according to actual conditions.

[0070] Optionally, the cavity tube 300 is internally provided with a traction channel 310 penetrating in the length direction, a traction wire passes through the traction channel 310, the catheter front end 110 and the soft section 122 are controlled to turn by a traction wire, and an operator is facilitated to control the whole endoscope catheter by using the traction wire.

[0071] Optionally, the cavity tube 300 is internally provided with a module channel 320 penetrating in the length direction, the module channel 320 is configured to pass through a camera and a cable optical fiber, and optical fiber light source and camera imaging are provided.

[0072] In addition, the cavity tube 300 is internally provided with a liquid injection cavity 330 penetrating in the length direction, the liquid injection cavity 330 is configured to pass through liquid to flush away obstacles, such as blood, that block the camera field of view during a surgical procedure, so as to flush away blood during the surgical procedure and ensure the camera field of view.

[0073] Optionally, the cavity tube 300 is internally provided with an instrument cavity 340 penetrating in the length direction, the instrument cavity 340 is configured to pass through surgical instruments, and instruments such as guide wires and biopsy forceps are used through the instrument cavity 340.

[0074] The endoscope catheter provided by the embodiment can reduce surface friction generated by a long catheter by forming a hydrophilic coating 200 on the catheter body 120, so that the catheter can enter deeper and thinner cavities; the hydrophilic coating 200 is solidified by coating a primer layer 210 and then solidifying a top layer 220. The primer layer 210 treatment can make the substrate surface properties uniform and increase the connection force between the top layer 220 and the base layer.

[0075] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present disclosure, and not to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure. Industrial applicability

[0076] In summary, the endoscope catheter provided by the embodiment of the present disclosure alleviates the technical problem of large friction between the existing endoscope catheter and human tissue in the prior art.

Claims

1. An endoscopic catheter, characterized by, The endoscope catheter comprises: a catheter member (100) and a hydrophilic coating (200); the catheter member (100) comprises a catheter front end (110) and a catheter body (120); the catheter front end (110) is connected with a distal end of the catheter body (120); an outer surface of the catheter body (120) has a coating area and a transition area (130), the transition area (130) is located between the coating area and the catheter front end (110); the hydrophilic coating (200) is arranged in the coating area, and the hydrophilic coating (200) is configured to reduce surface friction.

2. The endoscope catheter according to claim 1, wherein the hydrophilic coating (200) comprises a bottom layer (210) and a surface layer (220); the bottom layer (210) is coated on the outer surface of the catheter body (120), and the surface layer (220) is coated on the bottom layer (210).

3. The endoscope catheter according to claim 2, wherein after the bottom layer (210) is cured on the surface substrate of the catheter body (120), the surface layer (220) is coated on the bottom layer (210) and cured.

4. The endoscope catheter according to claim 2 or 3, wherein the material of the bottom layer (210) is a mixture of solvent ethanol and photoinitiator dimethyl benzoin propyl ether; the material of the surface layer (220) is a mixture of solvent ethanol and polyvinylpyrrolidone.

5. The endoscope catheter according to any one of claims 1-4, wherein the catheter front end (110) comprises a front end body (111) and a connecting ring (112); one end surface of the connecting ring (112) is connected with the front end body (111), and the other end surface of the connecting ring (112) is connected with the catheter body (120).

6. The endoscope catheter according to any one of claims 1-5, wherein the catheter body (120) comprises a hard section (121) and a soft section (122); one end of the soft section (122) is connected with the catheter front end (110), and the other end of the soft section (122) is connected with the hard section (121).

7. The endoscope catheter according to claim 6, wherein the catheter body (120) further comprises a connecting tube (140); one end surface of the connecting tube (140) is connected with the hard section (121), and the other end surface of the connecting tube (140) is connected with the soft section (122).

8. The endoscope catheter according to any one of claims 1-7, wherein the endoscope catheter further comprises a lumen tube (300); the lumen tube (300) is arranged in the inner cavity of the catheter body (120), and the outer wall of the lumen tube (300) abuts against the inner wall of the catheter body (120).

9. The endoscope catheter according to claim 8, wherein The inside of the cavity tube (300) is provided with a traction channel (310) along the length direction, which is configured for the traction line to pass through; The inside of the cavity tube (300) is provided with a module channel (320) along the length direction, which is configured for the camera and its cable optical fiber to pass through; The inside of the cavity tube (300) is provided with an instrument cavity (340) along the length direction, which is configured for the surgical instrument to pass through.

10. The endoscope catheter according to claim 8 or 9, wherein, The inside of the cavity tube (300) is provided with a liquid injection cavity (330) along the length direction, which is configured for the liquid to pass through, so as to flush away the obstacles blocking the camera view during the surgery.

11. The endoscope catheter according to any one of claims 1-10, wherein, The length of the coating area is 1mm-500m.

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