Endoscope catheter

Abstract

The utility model provides an endoscope catheter, which relates to the technical field of medical instruments and is characterized in that a coating area and a transition area are arranged on the surface of a catheter main body, and a hydrophilic coating is arranged in the coating area, so that a layer of stable hydrogel film is formed on the surface of the coating area of the catheter main body; the hydrophilic coating has good lubricity, softness and firmness after being activated by normal saline, and due to the fact that the hydrophilic coating is only coated on the coating area of the catheter main body and the transition area is not provided with the hydrophilic coating, the phenomenon that the hydrophilic coating is prone to falling off when the hydrophilic coating is coated is effectively avoided. The connecting gap between the hydrophilic coating catheter body and the catheter front end enters the catheter body, normal use is affected, and the technical problem that in the prior art, friction force between an existing endoscope catheter and human tissue is large is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an endoscope catheter. Background Art

[0002] There are different types of endoscopes, including gastroscopes, colonoscopes, bronchoscopes, cystoscopes, laparoscopes, etc. With the development of the endoscope industry, endoscope catheters are required to smoothly enter deeper and thinner cavities.

[0003] Existing endoscopic catheters enter the human body deeper in clinical practice. Deeper means longer catheters, and the longer the catheter, the greater the surface friction, which causes greater friction with human tissue, making it more difficult for medical staff to operate. Utility Model Content

[0004] The utility model aims to provide an endoscope catheter to alleviate the technical problem of large friction between the existing endoscope catheter and human tissue in the prior art.

[0005] The endoscope catheter provided by the utility model comprises: a catheter component and a hydrophilic coating;

[0006] The catheter component includes a catheter front end and a catheter body;

[0007] The front end of the catheter is connected to the proximal end of the catheter body;

[0008] 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 front end of the catheter;

[0009] The hydrophilic coating is disposed in the coating region, and the hydrophilic coating is configured to reduce surface friction.

[0010] In an alternative embodiment,

[0011] The hydrophilic coating comprises a bottom layer and a surface layer;

[0012] The base layer is coated on the outer surface of the catheter body, and the surface layer is coated on the base layer.

[0013] In an alternative embodiment,

[0014] After the base layer is cured on the surface substrate of the catheter body, the surface layer is coated on the base layer and cured.

[0015] In an alternative embodiment,

[0016] The material of the bottom layer is a mixture of solvent ethanol and photoinitiator dimethyl acetophenone;

[0017] The material of the surface layer is a mixture of solvent ethanol and polyvinyl pyrrolidone.

[0018] In an alternative embodiment,

[0019] The front end of the catheter includes a front end body and a connecting ring;

[0020] One end surface of the connecting ring is connected to the front end body, and the other end surface opposite to the connecting ring is connected to the catheter body.

[0021] In an alternative embodiment,

[0022] The catheter body includes a hard section and a soft section;

[0023] One end of the soft segment is connected to the front end of the catheter, and the other end of the soft segment is connected to the hard segment.

[0024] In an alternative embodiment,

[0025] The catheter body also includes a connecting tube;

[0026] One end surface of the connecting pipe is connected to the hard section, and the other end surface of the connecting pipe is connected to the soft section.

[0027] In an alternative embodiment,

[0028] The endoscope catheter also includes a lumen tube;

[0029] The lumen tube is disposed 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.

[0030] In an alternative embodiment,

[0031] A traction channel is provided inside the cavity tube along the length direction, and the traction channel is used for the traction wire to pass through.

[0032] In an alternative embodiment,

[0033] A module channel is provided inside the cavity tube along the length direction, and the module channel is used for the camera and its cable optical fiber to pass through;

[0034] The interior of the cavity tube is provided with a liquid injection cavity penetrating along the length direction, and the liquid injection cavity is used for liquid to pass through so as to flush away obstacles that block the field of view of the camera during surgery.

[0035] In an alternative embodiment,

[0036] An instrument lumen is provided in the lumen tube along the length direction, and the instrument lumen is used for surgical instruments to pass through.

[0037] In an alternative embodiment,

[0038] The length of the coating area is 1 mm to 500 m.

[0039] The endoscopic catheter provided by the utility model is provided with a coating area and a transition area on the surface of the catheter body, and a hydrophilic coating is provided in the coating area, so that a stable hydrogel film is formed on the surface of the coating area of ​​the catheter body. After being activated by physiological saline, the hydrophilic coating has good lubricity, softness and firmness. Moreover, since the hydrophilic coating is only coated on the coating area of ​​the catheter body, and the transition area does not have the hydrophilic coating, it is effectively avoided that when the hydrophilic coating is coated, the connection gap between the hydrophilic coating catheter body and the front end of the catheter enters the interior of the catheter body, affecting normal use, thereby alleviating the technical problem of large friction between the existing endoscopic catheter and human tissue in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 A schematic diagram of the overall structure of an endoscope catheter provided by an embodiment of the utility model;

[0042] Figure 2 A schematic diagram of the structure of a catheter component in an endoscope catheter provided by an embodiment of the utility model;

[0043] Figure 3 A schematic cross-sectional view of a hydrophilic coating in an endoscope catheter provided by an embodiment of the utility model;

[0044] Figure 4 for Figure 2 Schematic diagram of the cross section of AA.

[0045] Icons: 100-catheter component; 110-catheter front end; 111-front end body; 112-connecting ring; 120-catheter body; 121-hard section; 122-soft section; 130-transition area; 140-connecting tube; 200-hydrophilic coating; 210-bottom layer; 220-surface layer; 300-cavity tube; 310-traction channel; 320-module channel; 330-injection cavity; 340-instrument cavity. DETAILED DESCRIPTION

[0046] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0047] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0050] like Figure 1 , Figure 2 As shown, the endoscopic catheter provided by the utility model includes: a catheter component 100 and a hydrophilic coating 200; the catheter component 100 includes a catheter front end 110 and a catheter body 120; the catheter front end 110 is connected to the proximal end of the catheter body 120. It should be noted that the distal end is the end of the endoscopic catheter extending into the human body, and the proximal end is the end of the endoscopic catheter away from the human body.

[0051] The 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 front end 110 of the catheter. The hydrophilic coating 200 is arranged in the coating area, and the transition area 130 does not have a 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 and making the hydrophilic coating 200 more lubricated.

[0052] like Figure 3 As shown, in an optional embodiment, the hydrophilic coating 200 includes a base layer 210 and a surface layer 220 ; the base layer 210 is coated on the outer surface of the catheter body 120 , and the surface layer 220 is coated on the base layer 210 .

[0053] Specifically, the bottom layer 210 is first coated on the catheter body 120. After the bottom layer 210 is cured, the surface layer 220 is coated on the bottom layer 210. After the surface layer 220 is cured, the hydrophilic coating 200 can be formed on the catheter body 120. The advantage of curing the bottom layer 210 and the surface layer 220 separately is that they are more stable and not easy to fall off.

[0054] In an optional embodiment, the material of the bottom layer 210 is a mixture of solvent ethanol and photoinitiator dimethyl acetophenone; the material of the surface layer 220 is solvent ethanol and polyvinyl pyrrolidone, and the base material of the catheter body 120 is a polyether block polyamide material with good rebound and elastic recovery.

[0055] 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 interior of the catheter body 120 through the connection gap between the catheter body 120 and the catheter front end 110.

[0056] In addition, the endoscope catheter provided in this embodiment can be used with a duodenoscope, and the length of the hydrophilic coating 200 in the coating area ranges from 1 mm to 500 mm, preferably 300 mm.

[0057] The front end 110 of the catheter includes a front end body 111 and a connecting ring 112 ; one end surface of the connecting ring 112 is connected to the front end body 111 , and the other end surface of the connecting ring 112 opposite to the catheter body 120 is connected.

[0058] The connecting ring 112 is an annular structure, and the end faces on both sides of the connecting ring 112 are respectively connected to the front end body 111 of 110 and the catheter body 120. The end of the front end body 111 of 110 is arc-shaped. When used in surgery, the front end body 111 is first extended into the human body, and then the catheter body 120 is extended into the human body.

[0059] The endoscopic catheter provided in this embodiment forms a stable hydrogel film on the surface of the coating area of ​​the catheter body 120 by setting a coating area and a transition area 130 on the surface of the catheter body 120, and setting a hydrophilic coating 200 in the coating area. After being activated by physiological saline, the hydrophilic coating 200 has good lubricity, softness and firmness. In addition, since the hydrophilic coating 200 is only coated on the coating area of ​​the catheter body 120, the transition area 130 does not have the hydrophilic coating 200, which effectively prevents the hydrophilic coating 200 from entering the interior of the catheter body 120 at the connection gap between the catheter body 120 and the catheter front end 110 when the hydrophilic coating 200 is coated, affecting normal use, thereby alleviating the technical problem of large friction between the existing endoscopic catheter and human tissue in the prior art.

[0060] Based on the above embodiments, in an optional implementation, the catheter body 120 in the endoscopic catheter provided in this embodiment includes a hard segment 121 and a soft segment 122; one end of the soft segment 122 is connected to the catheter front end 110, and the other end of the soft segment 122 is connected to the hard segment 121.

[0061] Specifically, the catheter body 120 is divided into a hard segment 121 and a soft segment 122 of different hardnesses. The soft segment 122 is connected to the catheter front end 110 through a connecting ring 112, and the hard segment 121 is connected to one end of the soft segment 122 away from the connecting ring 112. When in use, the soft segment 122 is first inserted into the human body. The soft segment 122 has better elasticity and flexibility and is easier to bend in the human body. The hard segment 121 is used for the operator to apply insertion force, making it easier to insert the entire endoscope catheter into the human body.

[0062] In an optional embodiment, the catheter body 120 further includes a connecting tube 140 ; ​​one end surface of the connecting tube 140 is connected to the hard segment 121 , and the other end surface of the connecting tube 140 is connected to the soft segment 122 .

[0063] Specifically, the connecting tube 140 is a cylindrical structure, and both end surfaces of the connecting tube 140 are respectively connected to the hard section 121 and the soft section 122 . The function of the connecting tube 140 is to connect the hard section 121 and the soft section 122 into a whole.

[0064] In addition, the connecting tube 140 , the hard section 121 and the soft section 122 may be connected by hot melting to form the catheter body 120 by connecting the soft section 122 , the connecting tube 140 and the hard section 121 .

[0065] like Figure 4 As shown, in an optional embodiment, the endoscope catheter further includes a lumen tube 300 ; the lumen tube 300 is disposed 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 .

[0066] Specifically, the catheter body 120 and the cavity tube 300 are heat-shrinkable, and the catheter body 120 is sleeved on the outer surface of the cavity tube 300. The interior of the cavity tube 300 is penetrated by a plurality of chambers along the length direction. The specific number of chambers and the specific functions of the chambers are selected according to actual conditions.

[0067] In an optional embodiment, a traction channel 310 is provided inside the cavity tube 300 along the length direction, and the traction wire passes through the traction channel 310. The traction wire controls the catheter front end 110 and the soft section 122 to turn the catheter, making it convenient for the operator to use the traction wire to control the entire endoscope catheter.

[0068] In an optional embodiment, a module channel 320 is provided inside the cavity tube 300 along the length direction, and the module channel 320 is used for the camera and its cable optical fiber to pass through, providing an optical fiber light source and camera imaging.

[0069] In addition, a liquid injection channel 330 is provided inside the cavity tube 300 along the length direction. The liquid injection channel 330 is used for liquid to pass through to flush away obstacles blocking the camera's field of view during surgery, such as blood, and flush away the blood during surgery to ensure the camera's field of view.

[0070] In an optional embodiment, an instrument lumen 340 is provided in the lumen tube 300 along the length direction, and the instrument lumen 340 is used for surgical instruments to pass through, and instruments such as guide wires and biopsy forceps are used through the instrument lumen 340 .

[0071] The endoscope catheter provided in this embodiment has a hydrophilic coating 200 formed on the catheter body 120. The hydrophilic coating can reduce the surface friction generated by the long catheter, so that the catheter can enter a deeper and thinner cavity; the hydrophilic coating 200 is cured by coating a base layer 210 and then coating a surface layer 220. The treatment of the base layer 210 can make the surface properties of the substrate uniform and increase the connection between the surface layer 220 and the base layer.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An endoscopic catheter, characterized in that: include: A catheter member (100) and a hydrophilic coating (200); The catheter component (100) comprises a catheter front end (110) and a catheter body (120); The front end (110) of the catheter is connected to the distal end of the catheter body (120); The outer surface of the catheter body (120) has a coating area and a transition area (130), and the transition area (130) is located between the coating area and the catheter front end (110); The hydrophilic coating (200) is disposed in the coating region, and the hydrophilic coating (200) is configured to reduce surface friction.

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

3. The endoscopic catheter according to claim 2, characterized in that After the base layer (210) is cured on the surface substrate of the catheter body (120), the surface layer (220) is coated on the base layer (210) and cured.

4. The endoscopic catheter according to claim 2, characterized in that: The material of the bottom layer (210) is a mixture of solvent ethanol and photoinitiator dimethyl acetophenone; The material of the surface layer (220) is a mixture of solvent ethanol and polyvinyl pyrrolidone.

5. The endoscopic catheter according to claim 1, characterized in that 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 to the front end body (111), and the other end surface opposite to the connecting ring (112) is connected to the catheter body (120).

6. The endoscopic catheter according to claim 1, characterized in that: The catheter body (120) comprises a hard section (121) and a soft section (122); One end of the soft segment (122) is connected to the front end (110) of the catheter, and the other end of the soft segment (122) is connected to the hard segment (121).

7. The endoscopic catheter according to claim 6, characterized in that: The catheter body (120) further includes a connecting tube (140); One end surface of the connecting tube (140) is connected to the hard section (121), and the other end surface of the connecting tube (140) is connected to the soft section (122).

8. The endoscopic catheter according to claim 1, characterized in that: The endoscope catheter also includes a lumen tube (300); The lumen tube (300) is disposed 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 endoscopic catheter according to claim 8, characterized in that A traction channel (310) is provided inside the cavity tube (300) along the length direction, and the traction channel (310) is used for the traction wire to pass through; A module channel (320) is provided inside the cavity tube (300) along the length direction, and the module channel (320) is used for the camera and its cable optical fiber to pass through; An instrument lumen (340) is provided in the lumen tube (300) along the length direction, and the instrument lumen (340) is used for surgical instruments to pass through.

10. The endoscopic catheter according to claim 8, characterized in that The interior of the cavity tube (300) is provided with a liquid injection cavity (330) penetrating along the length direction, and the liquid injection cavity (330) is used for allowing liquid to pass through so as to clear obstacles that block the field of view of the camera during surgery.

11. The endoscopic catheter according to claim 1, characterized in that: The length of the coating area is 1 mm to 500 m.

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