Anti-deformation anesthesia catheter
By introducing a support structure, especially a wire tube support structure, into the anesthesia catheter, the problems of kinking and blockage caused by rotation during catheter insertion are solved, achieving smooth catheter insertion and improved connection strength.
Patent Information
- Application Number
- CN202520298705.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2026-03-20
- Estimated Expiration
- 2035-02-24
AI Technical Summary
When anesthesia catheters are inserted into the elastic element, the elastic element can easily become twisted or thinned due to differences in the force and speed of the doctor's operation, leading to blockage.
The design incorporates a catheter body and a catheter connector. The catheter body includes the catheter itself and a support structure. The support structure consists of a steel wire tube fitted inside the tail section of the catheter body. The steel wire tube has a spiral, cylindrical, conical, or shuttle-shaped structure along the axial direction to enhance the support of the catheter body and prevent kinking and blockage.
It improves the catheter's resistance to deformation, ensures smooth insertion and connection strength, avoids blockage, and enhances the catheter's performance.
Smart Images
Figure CN224008859U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to anesthetic catheter technical field, concretely relates to a kind of anti-deformation anesthetic catheter. BACKGROUND
[0002] Anesthetic catheter is the pipeline for delivering anesthetic to the patient, as it is made of soft medical grade material, with good flexibility and chemical corrosion resistance, so as to reduce the damage to human tissue. The anesthetic method of epidural nerve block has the advantages of simple operation, low cost, easy management during operation and postoperative epidural analgesia, so it is widely used. Small size anesthetic catheter with a tube diameter not exceeding 1mm is used in this anesthetic method. The small size anesthetic catheter is very soft and has no sharp tip, and needs to pass through the needle cavity of epidural needle to enter the epidural space. After the whole anesthetic catheter is in place, the epidural needle is withdrawn along the whole tube. Because it needs to pass through the needle cavity and the cavity body during application, it cannot be directly fixed and bonded to a larger catheter connector at the tail of the tube. Only after the epidural needle is withdrawn, the tube and the catheter connector can be connected by the doctor.
[0003] In actual application, the catheter connector has an elastic member, and the tube of the anesthetic catheter is connected to the catheter connector by inserting the tube into the elastic member. Therefore, the doctor needs to rotate and insert the tube of the anesthetic catheter into the elastic member. During rotation, axial extrusion force is generated on the elastic member, which reduces the inner diameter of the elastic member and makes it tighter around the tube of the anesthetic catheter. Alternatively, the doctor applies pressure to the elastic member in the radial direction to make it tighter around the tube of the anesthetic catheter. However, due to different operation force and speed of the doctor, the elastic member may be twisted or suddenly thinned in a certain section during the process of rotating and inserting the tube of the anesthetic catheter into the elastic member, which causes the anesthetic catheter to be blocked in the elastic member due to twisting or local clamping. SUMMARY
[0004] The utility model provides a kind of anti-deformation anesthetic catheter to solve the problem that anesthetic catheter is inserted into elastic member, and elastic member is wrapped around anesthetic catheter by axial extrusion force or radial pressure, and different operation force and speed of doctor also easily lead to the phenomenon that elastic member is twisted or suddenly thinned, so as to cause the problem that anesthetic catheter is clamped and blocked in elastic member.
[0005] The technical scheme adopted by the utility model is as follows:
[0006] An anti-deformation anesthetic catheter includes a catheter body and a catheter connector.
[0007] The catheter connector includes a cannula connector and a delivery tube connector connected in series. The cannula connector has an elastic member, and the delivery tube connector is used to connect with a delivery device.
[0008] The catheter body comprises a catheter body and a support structure; the support structure is sleeved and connected in the tail section of the catheter body, and a channel is formed in the support structure and communicates with the inner cavity of the catheter body; the catheter body is inserted and connected into the elastic member, and the tail section of the catheter body can partially extend into the catheter connector after being pulled out of the elastic member.
[0009] The anti-deformation anesthetic catheter has the following additional technical features:
[0010] The support structure comprises a steel wire tube, and the steel wire tube is spirally distributed in the inner periphery of the tail section of the catheter body through a steel wire.
[0011] The steel wire tube is in a cylindrical structure along the axial direction.
[0012] The steel wire tube is in a conical structure along the axial direction.
[0013] The steel wire tube in the conical structure has a large-diameter end and a small-diameter end arranged oppositely along the axial direction; the large-diameter end faces the head section of the catheter body, and the small-diameter end faces the tail section of the catheter body.
[0014] The steel wire tube is in a shuttle-shaped structure along the axial direction.
[0015] The steel wire tube in the shuttle-shaped structure has a front section, an intermediate section and a rear section arranged in sequence along the axial direction; the radial dimension of the front section gradually increases to the radial dimension of the intermediate section, and the radial dimension of the intermediate section gradually decreases to the radial dimension of the rear section.
[0016] At least part of the circumferential surface of the intermediate section can abut and connect to the inner wall of the catheter body along the axial direction.
[0017] The catheter connector comprises a catheter connector body and an elastic member; the catheter connector body has a first cavity and a second cavity formed inside, and the first cavity and the second cavity are connected and communicated through a passage; the elastic member is connected in the second cavity, the inside of the elastic member has a communication hole connected and communicated with the passage, and the catheter passes out of the communication hole from the first cavity and the passage.
[0018] The catheter connector has a first end and a second end arranged oppositely; the first end has a connecting portion connected to the outer periphery of the catheter connector body, and an extension portion inserted into the second cavity, and the extension portion can abut and connect to the end portion of the elastic member; the extension portion has a butt joint hole penetrating through the communication hole, so that the catheter can partially extend into the butt joint hole after passing through the communication hole; and the second end has a conical connecting cavity for inserting the infusion tube.
[0019] Due to the adoption of the above technical scheme, the utility model has the following beneficial effects:
[0020] 1. The utility model relates to an anti-deformation anesthesia catheter, including catheter main part and catheter joint, the catheter joint includes the intubation joint and the pipe joint of intercommunication, the intubation joint has the elastic member in, the pipe joint is used for connecting with infusion apparatus, the catheter main part includes the catheter body and the support structure, the support structure is connected in the tail section of catheter body, the support structure can effectively support the catheter body, especially the support degree of the tail section of catheter body is strengthened, when the catheter body is rotated and inserted into the elastic member of intubation joint, can both enhance the ability of abutting elastic member deformation, improve the anti-deformation ability, prevent the catheter body from appearing the kink phenomenon along the circumferential direction, also can make the catheter body more smooth and realize the quick insertion to the inside of elastic member, avoid the phenomenon of being inserted by the elastic member of intubation joint in the process of connecting with intubation joint even jamming, thereby enhancing the connection strength and use performance of whole anesthesia catheter,
[0021] And the support structure inside forms the passage that communicates with the inner chamber of catheter body, and the liquid is convenient for circulation in the inside of catheter body, the catheter main part is inserted and connected into intubation joint, and the tail section of catheter body can be partially inserted into the pipe joint after being taken out from intubation joint, prevent the elastic member contraction when clamping and cause the tail section inner chamber of catheter body to be sealed and not pass through.
[0022] 2. As a preferred embodiment of the utility model, the support structure includes a steel wire tube, which is spirally distributed in the inner periphery of the tail section of the catheter body by a steel wire.
[0023] The support structure adopts a steel wire tube, which is connected to the tail section of the catheter body in a sleeved manner. The steel wire tube is spirally wound on the inner periphery of the catheter body by a steel wire. At least part of the outer periphery of the steel wire tube can be connected to the inner wall of the catheter body to support the inner wall of the catheter body, thereby improving the support strength of the tail section of the catheter body. When the doctor inserts the tail section of the catheter body into the elastic member, the radial force exerted by the doctor on the catheter body can be resisted, preventing the deformation of the catheter body. At the same time, when the tail section of the catheter body is inserted into the elastic member, the phenomenon of the elastic member being jammed or even blocked due to twisting or sudden thinning of the catheter body can be avoided. The strength of the tail section of the catheter body can be enhanced by providing the support structure, thereby resisting the extrusion and torsion deformation force from the outside.
[0024] 3. As a preferred embodiment of the utility model, the steel wire tube has a cylindrical structure along the axial direction.
[0025] The steel wire tube is in a cylindrical structure, and the diameter of the steel wire tube is the same from one end to the other end in the axial direction of the steel wire tube. The outer diameter of the steel wire tube is matched with the inner diameter of the catheter body, so that the outer peripheral surface of the steel wire tube can abut against the inner wall of the catheter body, thereby enhancing the support force in the radial direction of the catheter body.
[0026] 4. As a preferred embodiment of the utility model, the steel wire tube is in a tapered structure in the axial direction.
[0027] The cross section of the steel wire tube in the axial direction is in a tapered structure. Further, the steel wire tube in the tapered structure has a large-diameter end and a small-diameter end arranged oppositely in the axial direction. The small-diameter end is directed towards the head section of the catheter body, and the large-diameter end is directed towards the tail section of the catheter body. The radial dimension gradually increases from the small-diameter end to the large-diameter end. The connection strength between the steel wire tube and the catheter body in the axial direction of the catheter body can be gradually enhanced. The small-diameter end is easier to be inserted into the inner cavity of the catheter body. The entire tapered steel wire tube can be assembled with the catheter body in a rotating manner. The connection with the catheter body is more compact during the assembly process, and the steel wire tube and the catheter body are more stable.
[0028] 5. As a preferred embodiment of the utility model, the steel wire tube is in a shuttle-shaped structure in the axial direction.
[0029] The cross section of the steel wire tube in the axial direction is in a shuttle-shaped structure. Further, the steel wire tube in the shuttle-shaped structure has a front section, an intermediate section and a rear section arranged in sequence in the axial direction. The radial dimension of the front section gradually increases to the radial dimension of the intermediate section, and the radial dimension of the intermediate section gradually decreases to the radial dimension of the rear section. The intermediate section is the largest in the radial dimension, and is used to abut against the inner wall of the catheter body. The radial dimension of the front section is small, which is beneficial to the front section entering the inner cavity of the catheter body first. In addition, the steel wire tube is assembled into the inner cavity of the catheter body in a rotating manner during the assembly process. Furthermore, the radial dimension of the rear section is smaller than the radial dimension of the intermediate section, so that the rear section is beneficial to be inserted into the inner cavity of the catheter body and also beneficial to be partially inserted into the inside of the catheter joint. BRIEF DESCRIPTION OF DRAWINGS
[0030] The drawings described herein are used to provide a further understanding of the utility model, and form a part of the utility model. The schematic embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute an improper limitation on the utility model. In the drawings:
[0031] Figure 1 It is a cross-sectional structure of a deformation-preventing anesthetic catheter according to an embodiment of the present application;
[0032] Figure 2A front view of a deformation-preventing anesthetic catheter according to an embodiment of the present application;
[0033] Figure 3 A structure diagram of a steel wire tube of a deformation-preventing anesthetic catheter according to a first embodiment of the present application;
[0034] Figure 4 A structure diagram of a steel wire tube of a deformation-preventing anesthetic catheter according to a second embodiment of the present application;
[0035] Figure 5 A structure diagram of a steel wire tube of a deformation-preventing anesthetic catheter according to a third embodiment of the present application;
[0036] In the drawings,
[0037] 1, catheter body; 11, catheter body; 12, support structure; 121, steel wire tube; 2, catheter joint; 21, cannula joint; 211, cannula joint body; 212, elastic member; 22, delivery tube joint; 3, first end; 4, second end; 5, connecting portion; 6, extension portion; 7, first cavity; 8, second cavity; 9, butt joint hole; 10, tapered connecting cavity. DETAILED DESCRIPTION
[0038] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details. In other instances, well-known methods have not been described in detail in order to avoid obscuring the present application. Therefore, the scope of the present application is indicated by the appended claims rather than the foregoing description.
[0039] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0040] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or can be integrated; can be mechanical connection, can also be electrical connection, or can be communication; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication or interaction relationship between two elements inside the two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0041] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the present application, the description of the terms "embodiment", "example", "an embodiment", "exemplary" or "specific example" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0042] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.
[0043] The utility model relates to a kind of anti-deformation anesthetic catheter, as shown in Figures 1-5 It includes catheter main body 1 and catheter connector 2;Catheter connector 2 includes the cannula connector 21 and the pipe connector 22 of intercommunication;Cannula connector 21 has elastic member 212 in, pipe connector 22 is used to be connected with infusion apparatus;Catheter main body 1 includes catheter body 11 and support structure 12;Support structure 12 is connected to the tail section of catheter body 11, and support structure 12 is formed inside the passage that is communicated with the inner cavity of catheter body 11;Catheter main body 1 is inserted and connected to the elastic member 212 of cannula connector 21, and the tail section of catheter main body 1 can be partially inserted into pipe connector 22 after being drawn out from elastic member 212.
[0044] The anesthesia catheter comprises a catheter body 1 and a catheter joint 2, the catheter body 1 is used as a tube body part of the anesthesia catheter, and the catheter joint 2 is used as a joint part connected with a tube body and capable of being connected with a liquid delivery device; liquid in the liquid delivery device can flow to the inside of the catheter body 1 through the catheter joint 2 and be delivered to the body of a patient through the catheter body 1. In actual operation, for example, in the anesthesia method of epidural nerve block, since the catheter body 1 needs to enter the epidural space through the needle cavity of an epidural needle, the catheter joint 2 cannot be connected to the catheter body 1 at the beginning, and needs to be connected to the catheter body 1 by a doctor after the epidural needle is withdrawn from the inside of the catheter body 1; therefore, in this process, since the catheter body 1 needs to be inserted into the catheter joint 2, and the catheter body 1 needs to be rotated during the insertion process, the rotation of the catheter body 1 can easily generate a rotating force on the elastic member 212 and further generate an axial force on the elastic member 212, and can also drive the elastic member 212 to rotate to a certain extent, so that the elastic member 212 is twisted and the catheter body 1 in the elastic member 212 is tightly wrapped, which can easily clamp the catheter body 1 and cause the catheter body 1 to be blocked and unable to normally deliver liquid; secondly, since the operation force of the doctor is different, the catheter body 1 can be easily clamped and blocked due to the overlarge force or too fast speed during the rotation of the catheter body 1, which can easily cause the elastic member 212 to be twisted or suddenly thinned in a certain section, and can also cause the catheter body 1 in the elastic member 212 to be clamped and blocked; and in the prior art, in order to facilitate the doctor to insert the catheter body 1 into the elastic member 212, the inner diameter of the elastic member 212 is often made larger, and the doctor needs to rotate multiple turns to lock, and the operation force and speed of the doctor during the tightening process are different, which can cause the elastic member 212 to be twisted or suddenly thinned in a certain section, and further aggravate the catheter body 1 in the elastic member 212 to be clamped and blocked.
[0045] Therefore, the application designs an anti-deformation anesthesia catheter, the catheter body 1 comprises a catheter body 11 and a support structure 12; the catheter joint 2 comprises a cannula joint 21 and a tube joint 22; the support structure 12 is sleeved and connected to the tail section of the catheter body 11, and the support structure 12 can effectively support the catheter body 11, especially the tail section of the catheter body 11 connected with the catheter joint 2, so that the support strength is enhanced, the ability to resist deformation of the elastic member 212 is enhanced, the anti-deformation ability of the catheter body 11 is improved, the catheter body 11 is prevented from being twisted in the circumferential direction, the catheter body 11 is more smoothly inserted into the inside of the elastic member 212, the catheter body 11 is prevented from being clamped and blocked by the elastic member 212 of the cannula joint 21 during the connection with the cannula joint 21, and the connection strength and use performance of the entire anesthesia catheter are enhanced;
[0046] And the support structure 12 is internally formed with a channel communicated with the inner cavity of the catheter body 11, facilitating the circulation of liquid inside the catheter body 11; the catheter body 1 is inserted into the cannula connector 21, and the tail section of the catheter body 1 can be partially inserted into the tube connector 22 after being pulled out of the cannula connector 21, preventing the elastic member 212 from being contracted to seal the tail cavity of the catheter body 11.
[0047] As a preferred embodiment, the support structure 12 comprises a steel wire tube 121, which is spirally distributed on the inner periphery of the tail section of the catheter body 11 by a steel wire.
[0048] As shown in Figure 1 , the catheter body 1 comprises a catheter body 11 and a support structure 12, the support structure 12 adopts a steel wire tube 121, which is sleeved and connected to the tail section of the catheter body 11, the steel wire tube 121 is spirally wound on the inner periphery of the catheter body 11 by a steel wire, and at least part of the outer periphery of the steel wire tube 121 can be abutted and connected to the inner periphery of the catheter body 11 to support the tail section of the catheter body 11, thereby improving the support strength of the tail section of the catheter body 11, facilitating the resistance to the radial force applied by the doctor grabbing the catheter body 11 when inserting the tail section of the catheter body 11 into the elastic member 212, preventing the deformation of the catheter body 11, and avoiding the kinking or sudden thinning of the elastic member 212 when the tail section of the catheter body 11 is inserted into the elastic member 212, which can cause the catheter body 11 to be clamped or even blocked.
[0049] For the structure of the steel wire tube 121, it can not be limited by the present application, and the following embodiments can be adopted:
[0050] Embodiment one: the steel wire tube 121 is in a cylindrical structure along the axial direction.
[0051] As shown in Figure 3 , the steel wire tube 121 is in a cylindrical structure, that is, the diameter of the steel wire tube 121 is the same from one end to the other end along the axial direction of the steel wire tube 121, and the outer diameter of the steel wire tube 121 is matched with the inner diameter of the catheter body 11, so that the outer periphery of the steel wire tube 121 can be abutted and connected to the inner wall of the catheter body 11, thereby enhancing the support force of the catheter body 11 in the radial direction.
[0052] Embodiment two: the steel wire tube 121 is in a conical structure along the axial direction.
[0053] As shown in Figure 4 , the cross section of the steel wire tube 121 along the axial direction is in a conical structure, and further, the steel wire tube 121 in a conical structure has a large diameter end and a small diameter end arranged oppositely along the axial direction;Figure 4 As shown in the orientation, the left end of the figure is the small diameter end, and the right end is the large diameter end. In actual application, the small diameter end is directed towards the head section of the catheter body 11, and the large diameter end is directed towards the tail section of the catheter body 11. The radial dimension gradually increases from the small diameter end to the large diameter end, which can gradually increase the connection strength between the steel wire tube 121 and the catheter body 11 along the axial direction of the catheter body 11. The small size of the small diameter end facilitates the assembly of the tapered steel wire tube 121 into the inner cavity of the catheter body 11. The entire tapered steel wire tube 121 can be assembled with the catheter body 11 in a rotating manner. During the assembly process, the connection with the catheter body 11 is more secure, and the steel wire tube 121 and the catheter body 11 are more stable.
[0054] Embodiment three: the steel wire tube 121 is in a shuttle-shaped structure along the axial direction.
[0055] As shown in the orientation, Figure 5 the cross section of the steel wire tube 121 in the axial direction is in a shuttle-shaped structure. Further, the steel wire tube 121 in a shuttle-shaped structure has a front section, an intermediate section, and a rear section arranged in sequence along the axial direction. The radial dimension of the front section gradually increases to the radial dimension of the intermediate section, and the radial dimension of the intermediate section gradually decreases to the radial dimension of the rear section.
[0056] The intermediate section is the largest radial dimension section, which is designed to abut against the inner wall of the catheter body 11. Therefore, further, at least part of the circumferential surface of the intermediate section along the axial direction can abut against and connect to the inner wall of the catheter body 11. The radial dimension of the front section is small, which facilitates the front section to enter the inner cavity of the catheter body 11 first. Moreover, it is beneficial for the steel wire tube 121 to be assembled into the inner cavity of the catheter body 11 in a rotating manner during the assembly process. Furthermore, the radial dimension of the rear section is smaller than that of the intermediate section, which makes the rear section easy to be inserted into the inner cavity of the catheter body 11, and also easy to be partially inserted into the interior of the catheter connector 22.
[0057] As a preferred embodiment, the catheter connector 21 comprises a catheter connector body 211 and an elastic member 212. The catheter connector body 211 has a first cavity 7 and a second cavity 8 formed inside. The first cavity 7 and the second cavity 8 are connected by a passageway. The elastic member 212 is connected inside the second cavity 8. The elastic member 212 has a communication hole inside which is connected to the passageway. The catheter body 11 passes out of the communication hole from the first cavity 7 and the passageway.
[0058] As shown in the orientation, Figure 1 the catheter connector 21 comprises a catheter connector body 211. The catheter connector body 211 has two cavities inside. As shown in the orientation, Figure 1The left side of the shown orientation is the first cavity 7, and the right side is the second cavity 8, and a passageway is connected between the first cavity 7 and the second cavity 8, the passageway is a cylindrical structure, which can make the first cavity 7 and the second cavity 8 communicate, the first cavity 7 is a horn-shaped structure, the horn opening faces outward, the second cavity 8 is a cylindrical structure, the left end of the second cavity 8 is connected to the left side of the elastic member 212, such as Figure 1 As shown, after the cannula connector 21 and the delivery tube connector 22 are connected, one end of the delivery tube connector 22 can be connected to the right side of the elastic member 212, so that the left side of the elastic member 212 can be connected to the left end of the second cavity 8. The elastic member 212 has a communication hole inside along the axis, which can communicate with the passageway, the purpose is when the catheter body 11 is inserted from the first cavity 7, through the passageway and extends into the communication hole of the elastic member 212, after the catheter body 11 is inserted from the communication hole, the tail section of the catheter body 11 can be inserted into the inside of the delivery tube connector 22.
[0059] As a preferred embodiment, the delivery tube connector 22 has a first end 3 and a second end 4 arranged opposite to each other; the first end 3 has a connecting part 5 connected to the outer periphery of the cannula connector body 211, and an extension part 6 inserted into the second cavity 8, the extension part 6 can be connected to the end of the elastic member 212; the extension part 6 has a docking hole 9 communicated with the communication hole, so that the catheter body 11 can be partially inserted into the docking hole 9 after passing through the communication hole; the second end 4 has a tapered connecting cavity 10 for inserting the infusion tube.
[0060] As Figure 1The catheter connector 22 is connected to the right side of the cannula connector 21, the left side of the catheter connector 22 is the first end 3, the right side of the catheter connector 22 is the second end 4, the first end 3 of the catheter connector 22 has a connecting part 5 and an extension part 6, the connecting part 5 and the extension part 6 are in a sleeve shaft structure, the first end 3 of the catheter connector 22 has a cylindrical extension part 6 inside, the connecting part 5 outside has a cylindrical structure, a reserved gap is formed between the connecting part 5 and the extension part 6 in the radial direction, an internal thread is formed on the inner wall of the connecting part 5, an external thread is formed on the outer periphery of the cannula connector body 211, the connecting part 5 is screwed to the outer side of the cannula connector body 211, so that the cannula connector 21 and the catheter connector 22 are docked. The extension part 6 can extend into the second cavity 8 of the cannula connector body 211 and abut against the elastic member 212, so that the elastic member 212 is locked in the second cavity 8, the extension part 6 has a docking hole 9 communicating with the communication hole, so that the catheter body 11 can extend into the docking hole 9 after passing through the communication hole, so that the tail part of the catheter body 11 extends into the catheter connector 22, to prevent the elastic member 212 from shrinking and causing the tail cavity of the catheter body 11 to be sealed and not communicated. The second end 4 is provided with a tapered connecting cavity 10 for inserting the infusion device into the tapered connecting cavity 10, and the tapered connecting cavity 10 is communicated with the docking hole 9, so that the liquid in the infusion device can be conveyed to the inner cavity of the catheter body 11 through the docking hole 9 and finally input into the patient's body.
[0061] The parts not described in the utility model can be realized by using or referring to the existing technology.
[0062] Each embodiment in the specification adopts a progressive manner, and the same and similar parts between each embodiment can be referred to, and each embodiment mainly describes the difference from other embodiments.
[0063] The above is only an embodiment of the utility model, and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the claim range of the utility model.
Claims
1. A deformation-resistant anesthesia catheter, characterized in that, Includes the catheter body and catheter connector; The catheter connector includes a connected insertion connector and an infusion connector; the insertion connector has an elastic element inside, and the infusion connector is used to connect to the infusion set; The catheter body includes a catheter body and a support structure; the support structure is sleeved and connected to the tail section of the catheter body, and a channel is formed inside the support structure that communicates with the inner cavity of the catheter body; the catheter body is inserted and connected to the elastic element, and the tail section of the catheter body can partially extend into the infusion connector after passing through the elastic element.
2. The anti-deformation anesthesia catheter according to claim 1, characterized in that, The support structure includes a steel wire tube, which is spirally distributed around the inner circumference of the tail section of the conduit body via a single steel wire.
3. The deformation-resistant anesthesia catheter according to claim 2, characterized in that, The steel wire tube has a cylindrical structure along the axial direction.
4. The anti-deformation anesthesia catheter according to claim 2, characterized in that, The steel wire tube has a tapered structure along the axial direction.
5. The anti-deformation anesthesia catheter according to claim 4, characterized in that, The conical steel wire tube has a large-diameter end and a small-diameter end that are arranged opposite each other along the axial direction; the large-diameter end faces the head section of the catheter body, and the small-diameter end faces the tail section of the catheter body.
6. The anti-deformation anesthesia catheter according to claim 2, characterized in that, The steel wire tube has a spindle-shaped structure along the axial direction.
7. The deformation-resistant anesthesia catheter according to claim 6, characterized in that, The steel wire tube with a spindle-shaped structure has a front section, a middle section and a rear section arranged sequentially along the axial direction; the radial dimension of the front section gradually increases from the radial dimension of the middle section to the radial dimension of the rear section, and the radial dimension of the middle section gradually decreases from the radial dimension of the rear section.
8. The anti-deformation anesthesia catheter according to claim 7, characterized in that, At least a portion of the circumferential surface of the intermediate section along the axial direction can abut against and connect to the inner wall of the catheter body.
9. The deformation-resistant anesthesia catheter according to claim 1, characterized in that, The insertion connector includes an insertion connector body and an elastic element; The cannula connector body has a first cavity and a second cavity inside, which are connected by a passage. An elastic element is connected to the second cavity, and the elastic element has a connecting hole that is connected to the passage. The catheter passes through the first cavity and the passage to the outside of the connecting hole.
10. The deformation-resistant anesthesia catheter according to claim 9, characterized in that, The pipeline connector has a first end and a second end that are disposed opposite to each other; The first end has a connecting portion connected to the outer periphery of the cannula connector body, and an extension portion inserted into the second cavity, the extension portion being able to abut against the end of the elastic member; the extension portion has a mating hole communicating with the connecting hole, so that the catheter can partially extend into the mating hole after passing through the connecting hole; the second end has a tapered connecting cavity for inserting the infusion tube.