Cuff catheter jacket protector securement device

Abstract

The utility model discloses a kind of Kaf catheter outer sleeve protection fixing devices, Kaf catheter includes tube body and the outer fixing member being arranged on tube body, the outer fixing member has two fixed wings, this Kaf catheter outer sleeve protection fixing device includes sleeve and clamping seat, sleeve is suitable for being set on the tunnel mouth position of tube body near patient body surface;Clamping seat has the clamping cavity suitable for the outer fixing member clamping, and the clamping cavity has elasticity;Sleeve and clamping seat are suitable for being fixed on patient body surface by bonding, when the outer fixing member clamps into the clamping cavity, the Kaf catheter is fixed relative to the clamping seat.The Kaf catheter outer sleeve protection fixing device provided by the utility model realizes the efficient stable fixing of Kaf catheter by sleeve cooperation with the clamping seat with elastic restraint effect, while avoiding the residual of catheter surface adhesive mark, subsequent cleaning and disinfection difficulty and bacterial breeding risk existing in traditional application bonding fixed mode.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a protective and fixing device for a kraft catheter sheath. Background Technology

[0002] In hemodialysis treatment, kraft catheters play a crucial role as a commonly used vascular access. Currently, in clinical practice, dressings or adhesive tape are commonly used to directly attach the catheter to the patient's body surface for fixation. While this method is simple to operate, it has revealed several problems in practical application. For example, adhesive tape residue can remain on the catheter surface, affecting its cleanliness. Patients need to undergo dialysis 2 to 3 times a week, requiring dressing changes and catheter cleaning at each session. During these changes, the adhesive tape residue on the catheter surface necessitates repeated wiping with a special cleaning solution, and this wiping process requires extreme care to prevent the kraft from dislodging, thus adding considerable difficulty to cleaning and disinfection. Furthermore, residual adhesive tape leads to surface contamination and bacterial growth, increasing the patient's risk of infection. Utility Model Content

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the purpose of this invention is to provide a protective and fixing device for a kraft catheter sheath.

[0004] To achieve the above objectives, according to an embodiment of the present invention, a kraft catheter outer sheath protection and fixing device is provided, wherein the kraft catheter includes a tube body and an external fixing member disposed on the tube body, the external fixing member having two fixing wings, and the kraft catheter outer sheath protection and fixing device includes:

[0005] A cannula, the cannula being adapted to be fitted onto the tube body at a tunnel opening location near the patient's body surface;

[0006] The retaining seat has a retaining cavity adapted for the external fixing member to be engaged, and the retaining cavity is elastic;

[0007] The cannula and retainer are adapted to be bonded and fixed to the patient's body surface. When the external fixator is inserted into the retaining cavity, the clasp catheter is fixed relative to the retainer.

[0008] The taffeta catheter sheath protection and fixation device provided in this embodiment of the invention achieves effective and stable fixation of the taffeta catheter by using a sleeve in conjunction with a retaining seat that has an elastic binding effect. This avoids the problems associated with traditional adhesive bonding methods, such as adhesive residue on the catheter surface, difficulties in subsequent cleaning and disinfection, and the risk of bacterial growth. Furthermore, the retaining fixation method has good reliability and is convenient for clinical operation and subsequent maintenance.

[0009] In addition, the kraft catheter sheath protection and fixation device according to the above embodiments of this utility model may also have the following additional technical features:

[0010] According to one embodiment of the present invention, the side wall of the sleeve is provided with an opening, the opening extends along the axial direction of the sleeve and passes through both ends of the sleeve, for the purpose of inserting the tube body into the sleeve.

[0011] According to one embodiment of the present invention, the retaining base includes:

[0012] A base plate, said base plate being adapted to be bonded and fixed to the patient's body surface;

[0013] Two opposing clamping plates are fixedly mounted on the base plate and define the clamping cavity. An entry point communicating with the clamping cavity is formed between the upper ends of the two clamping plates, so that the external fixing member can be inserted into the clamping cavity.

[0014] According to one embodiment of the present invention, a slot is provided on each side of one end of the holding cavity. When the external fixing member is inserted into the holding cavity, the two fixing wings are positioned and engaged with the slots on the two side walls of the holding cavity.

[0015] According to one embodiment of the present invention, the external fixing member includes a first fixing section and a second fixing section, and the two fixing wings are symmetrically arranged between the first fixing section and the second fixing section.

[0016] The sleeve has a connected straight section and a first expansion section. The straight section is adapted to be sleeved on the tube body, and the diameter of the first expansion section is larger than that of the straight section and is adapted to be sleeved on the first fixed section.

[0017] When the external fastener is inserted into the holding cavity, the second fixing segment and the two fixing wings are located within the holding cavity.

[0018] According to one embodiment of the present invention, the sleeve further has a second expansion section connected to the first expansion section, the second expansion section being adapted to be sleeved outside the second fixed section to completely cover the second fixed section.

[0019] According to one embodiment of the present invention, elastic strips are provided on both sides of one end of the holding cavity, the slot is provided on the elastic strip, and the upper end of the elastic strip is provided with a guide slope for guiding the fixing wing.

[0020] According to one embodiment of the present invention, the inner sidewall of the card plate is provided with a buckle, and the second expansion section is provided with a buckle hole that engages with the buckle, so that the sleeve and the card holder are fixed relative to each other.

[0021] According to one embodiment of the present invention, the inner wall of the sleeve is provided with interlocking teeth, which extend circumferentially along the sleeve to clamp the tube body inserted into the sleeve.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the protective and fixing device for the kraft catheter sheath according to an embodiment of this utility model;

[0025] Figure 2 This is a cross-sectional view of the protective and fixing device for the kraft catheter sheath according to an embodiment of this utility model;

[0026] Figure 3 This is an exploded view of the protective and fixing device for the kraft catheter sheath according to an embodiment of this utility model;

[0027] Figure 4 This is an exploded view of the use state of the kraft catheter sheath protection and fixation device according to an embodiment of this utility model.

[0028] Figure label:

[0029] 10. Kraft catheter;

[0030] 101. Pipe body;

[0031] 102. External fasteners;

[0032] 1021. First fixed segment;

[0033] 1022, Second Fixed Section;

[0034] 1023. Fixed-wing aircraft;

[0035] 20. Sleeve;

[0036] 201. Straight line segment;

[0037] 202. First expansion stage;

[0038] 203. Second expansion phase;

[0039] 204. Occlusal teeth;

[0040] H2O, open;

[0041] H2O3, card slot;

[0042] 30. Clip holder;

[0043] 301. Base plate;

[0044] 302, pallet;

[0045] 3021, buckle;

[0046] 303. Elastic strip;

[0047] P30, holding cavity;

[0048] H301, Card Entry;

[0049] H303, Card slot;

[0050] S30, guide ramp.

[0051] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0052] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0053] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0055] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0056] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0057] The following describes in detail, with reference to the accompanying drawings, the kraft catheter sheath protection and fixing device of this utility model embodiment.

[0058] Reference Figures 1 to 3 As shown, according to the embodiment of the present utility model, the kraft catheter 10 includes a tube body 101 and an external fixing member 102 provided on the tube body 101. The external fixing member 102 has two fixing wings 1023. The kraft catheter 10 outer sleeve protection and fixing device includes a sleeve 20 and a locking seat 30.

[0059] Specifically, the cannula 20 is adapted to be fitted onto the tube body 101 at the tunnel opening near the patient's body surface. The length of the cannula 20 can be designed according to the length of the kraft catheter 10 outside the body to meet the needs of kraft catheters 10 of different lengths.

[0060] The retaining base 30 has a retaining cavity P30 suitable for the external fixing member 102 to be engaged, and the retaining cavity P30 is elastic.

[0061] The cannula 20 and the retaining seat 30 are adapted to be bonded and fixed to the patient's body surface. When the external fixator 102 is inserted into the retaining cavity P30, the clamping catheter 10 and the retaining seat 30 are fixed relative to each other. The retaining seat 30 can be made of a plastic material with a certain degree of elasticity, such as PC material.

[0062] In actual use, firstly, medical staff place the cannula 20 onto the tube body 101 of the clavicle catheter 10, adjusting the position of the cannula 20 to be close to the tunnel opening on the patient's body surface, for example, 1 cm away from the tunnel opening. Next, the medical staff inserts the external fixator 102 on the patient's tube body 101 into the retaining cavity P30 of the retaining seat 30. Because the retaining cavity P30 on the retaining seat 30 is elastic, after the external fixator 102 is inserted into the retaining cavity P30, the external fixator 102 can be relatively fixed to the retaining seat. At this time, the clavicle catheter 10 is relatively fixed to the retaining seat. Finally, the retaining seat 30 and the cannula 20 are bonded and fixed, and an dressing is placed over the surfaces of the retaining seat 30 and the cannula 20 and then adhered and fixed to the patient's body surface. Because the clavicle catheter 10 is located inside the cannula 20 and the retaining seat 30, the dressing will not come into contact with the clavicle catheter 10.

[0063] The protective fixation device for the kraft catheter 10 is for single use only. It needs to be replaced during each dialysis treatment. Medical staff simply need to remove the dressing, remove the cannula 20 and retainer 30 from the kraft catheter 10, clean and disinfect the kraft catheter 10 and the patient's skin, and then replace it with a new cannula 20 and retainer 30 following the same steps. Since there is no adhesive residue on the surface of the kraft catheter 10, the entire cleaning and disinfection process is very simple and convenient, thus ensuring safe, quick, and efficient operation.

[0064] According to the embodiments of this utility model, the tweezers catheter sheath protection and fixation device, by using a sleeve 20 in conjunction with a retaining seat 30 that has an elastic binding effect, effectively and securely fixes the tweezers catheter 10, while avoiding the problems of adhesive residue on the catheter surface, difficulties in subsequent cleaning and disinfection, and the risk of bacterial growth that exist in traditional dressing and adhesive fixation methods. In addition, the retaining fixation method has good reliability and is also convenient for clinical operation and subsequent maintenance.

[0065] In one embodiment of this utility model, the side wall of the sleeve 20 is provided with an opening H20, which extends axially along the sleeve 20 and passes through both ends of the sleeve 20, for inserting the tube body 101 into the sleeve 20. Preferably, the sleeve 20 is made of the same elastic material as the retainer, such as PC material. In its natural state, the diameter of the sleeve 20 is slightly smaller than the diameter of the tube body 101 of the retainer 10. After the tube body 101 is inserted into the sleeve 20, the sleeve 20 can hold the tube body 101 tightly under elastic action, achieving relative fixation between the two.

[0066] During use, first align the tube body 101 of the kraft catheter 10 with the opening H20 of the sleeve 20. The opening H20 allows the tube body 101 to smoothly insert into the sleeve 20. Because the opening H20 extends axially along the sleeve 20, it provides the user with greater operational flexibility and stability during insertion, effectively reducing the difficulty of the operation. Once the tube body 101 is fully inserted into the sleeve 20, the elasticity of the sleeve 20 causes a tight fit between the inner wall of the sleeve 20 and the tube body 101, achieving the covering and fixation of the kraft catheter 10.

[0067] Through the above design, the opening H20 on the side wall of the cannula 20 ensures that the kraft catheter 10 can be easily and quickly inserted into the cannula 20, while also making the cannula 20 more adaptable. This not only simplifies the clinical procedure but also improves the reliability of the kraft catheter 10 fixation.

[0068] In one embodiment of the present invention, the card holder 30 includes a base plate 301 and two opposing card plates 302. The base plate 301 is adapted to be bonded and fixed to the patient's body surface. The base plate 301 can be a rectangular plate.

[0069] Two clamping plates 302 are fixedly disposed on the base plate 301 and define the clamping cavity P30. A clamping inlet H301 communicating with the clamping cavity P30 is formed between the upper ends of the two clamping plates 302, so that the external fixing member 102 can be clamped into the clamping cavity P30.

[0070] For example, the card plate 302 is made of a plastic with a certain degree of elasticity, such as PC or nylon, so that an elastic holding cavity P30 is formed between the two card plates 302. When the outer fixing member 102 is inserted, efficient fixation is achieved through elastic restraint. During use, the outer fixing member 102 is pushed in along the card inlet H301 until it is fully inserted into the holding cavity P30.

[0071] After the external fastener 102 is inserted into the retaining cavity P30, the external fastener 102 will be elastically clamped due to the elastic constraint of the retaining cavity P30. This elastic clamping action ensures that a stable clamping fit is formed between the external fastener 102 and the retaining seat 30, effectively preventing the external fastener 102 from shifting or falling off during subsequent use.

[0072] In this embodiment, the clamping seat 30 with the above-described structure not only simplifies the clinical operation process and improves the ease of installation, but also utilizes the elastic constraint of the two clamping plates 302 to make the external fixator 102 clamped and fixed more reliably, thereby enhancing the overall stability and reliability.

[0073] In one embodiment of this utility model, a slot H303 is provided on each of the two side walls of the retaining cavity P30. When the external fixing member 102 is inserted into the retaining cavity P30, the two fixing wings 1023 are positioned and engaged with the slots H303 on the two side walls of the retaining cavity P30 in a one-to-one correspondence. Preferably, the shape and size of the slots H303 are adapted to the fixing wings 1023.

[0074] When the two fixing wings 1023 of the external fixator 102 are respectively inserted into the slots H303 on both sides of the holding cavity P30, due to the matching size and shape of the slots H303 and the fixing wings 1023, a tight mechanical engagement can be formed between the fixing wings 1023 and the slots H303, ensuring that the external fixator 102 is in a stable state within the holding cavity P30. This one-to-one engagement method, based on the elastic constraint of the holding cavity P30, not only achieves precise positioning of the external fixator 102, but also significantly improves the reliability of the fixing device in fixing the entire clamping catheter 10, effectively preventing problems such as displacement or detachment of the clamping catheter 10.

[0075] In this embodiment, slots H303 are provided on both sides of the holding cavity P30. By engaging with the fixing wings 1023 on the external fixator 102, reliable positioning and fixation of the external fixator 102 are achieved. This effectively prevents displacement or detachment caused by external forces, providing an effective guarantee for the safety and stability of the kraft catheter 10 during clinical use.

[0076] In one embodiment of the present invention, the external fixing member 102 includes a first fixing section 1021 and a second fixing section 1022, and the two fixing wings 1023 are symmetrically arranged between the first fixing section 1021 and the second fixing section 1022.

[0077] The sleeve 20 has a connected straight section 201 and a first expansion section 202. The straight section 201 is adapted to be sleeved on the tube body 101. The diameter of the first expansion section 202 is larger than that of the straight section 201 and is adapted to be sleeved on the first fixed section 1021.

[0078] When the external fixing member 102 is inserted into the holding cavity P30, the second fixing section 1022 and the two fixing wings 1023 are located in the holding cavity P30.

[0079] In other words, part of the cannula 20 is fitted onto the tube body 101, and another part is fitted onto the first fixing section 1021 of the external fixator 102. After the external fixator 102 is inserted into the holding cavity P30, the second fixing section 1022 and the two fixing wings 1023 are located within the retaining seat 30. Thus, the entire section from the tube body 101 to the external fixator 102 is inside the cannula 20 and the external fixating seat. After the dressing is covered over the cannula 20 and the retaining seat 30 and then applied to the patient's skin, the entire dressing will not come into contact with the internal clavicle catheter 10. This achieves better isolation and protection. The first fixing section 1021 of the external fixator 102 is located within the first expansion section 202 of the cannula 20, which can prevent pressure damage. The fixing wings 1023 are located within the holding cavity P30 and will not come into contact with the patient's skin, preventing scratches. In addition, this wrapping method also improves the reliability of the fixation of the clavicle catheter 10, and improves the fixation effect and safety protection.

[0080] In one embodiment of the present invention, the sleeve 20 further has a second expansion section 203 connected to the first expansion section 202, the second expansion section 203 being adapted to be sleeved on the outside of the second fixed section to completely cover the second fixed section.

[0081] In practical use, after the external fixator 102 is inserted into the retaining cavity P30, the sleeve 20 is then placed on the tube body 101, ensuring that the second expansion section 203 of the sleeve 20 is inserted into the retaining cavity P30 and placed outside the second fixing section 1022. In this way, the second expansion section 203 completely covers the second fixing section 1022 of the external fixator 102, so the second fixing section 1022 will not be exposed at the card inlet H301. Finally, when the patch is placed over the retaining seat 30 and the sleeve 20, the patch is completely isolated from the internal external fixator 102 and tube body 101, and will not come into contact with any part of the internal clasp catheter 10. Thus, a comprehensive isolation and protection effect is achieved.

[0082] In one embodiment of this utility model, elastic strips 303 are respectively provided on both sides of one end of the holding cavity P30, and the slot H303 is provided on the elastic strip 303. The upper end of the elastic strip 303 is provided with a guide slope S30 for guiding the fixing wing 1023. Preferably, the elastic strip 303 and the base plate 301 are integral structures.

[0083] When the outer fixing member 10 is installed into the holding cavity P30, the fixing wings 1023 on the outer fixing member 10 can be pressed downwards onto the elastic strip 303. Under the guiding action of the guide slope S30, the elastic strip 303 deforms outwards, and finally the two fixing wings 1023 are successfully inserted into the slots on the elastic strip 303.

[0084] The structure of the elastic strip 303 and the guide slope S30 makes it quicker and easier to insert the external fixing member 10 into the retaining cavity P30, achieving accurate positioning and fixation. At the same time, during disassembly, the external fixing member 10 can be removed from the retaining seat 30 by prying the two elastic strips 303 outward, making disassembly and replacement simpler and more convenient.

[0085] In one embodiment of the present invention, a buckle 3021 is provided on the inner sidewall of the card plate 302, and a card hole H203 is provided on the second expansion section 203 to engage with the buckle 3021, so that the sleeve 20 and the card holder 30 are relatively fixed.

[0086] After the external fixator 102 is inserted into the retaining cavity P30, the second expansion section 203 of the sleeve 20 is fitted onto the second fixing section 1022 of the external fixator 102. It is then ensured that the retaining hole H203 on the second expansion section 203 engages with the buckle 3021 on the retaining plate 302. In this way, the sleeve 20 and the retaining seat 30 can be relatively fixed. Finally, the two are bonded to the patient's body surface using an adhesive dressing. This further improves the reliability and stability of the fixation of the kraft catheter 10.

[0087] In one embodiment of the present invention, the inner wall of the sleeve 20 is provided with interlocking teeth 204, which extend circumferentially along the sleeve 20 to clamp the tube body 101 inserted into the sleeve 20.

[0088] Once the tube body 101 is inserted into the sleeve 20 through the opening H20, the contact surface formed along the periphery of the tube body 101 will be simultaneously clamped by multiple interlocking teeth 204. This structure ensures that the tube body 101 can be effectively fixed, further improving the stability and safety of the fixation of the kraft catheter 10.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0090] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A protective and fixing device for a kraft catheter sheath, the kraft catheter comprising a tube body and an external fixing member disposed on the tube body, the external fixing member having two fixing wings, characterized in that, The kraft catheter sheath protection and fixation device includes: A cannula, the cannula being adapted to be fitted onto the tube body at a tunnel opening location near the patient's body surface; The retaining seat has a retaining cavity adapted for the external fixing member to be engaged, and the retaining cavity is elastic; The cannula and retainer are adapted to be bonded and fixed to the patient's body surface. When the external fixator is inserted into the retaining cavity, the clasp catheter is fixed relative to the retainer.

2. The kraft catheter sheath protection and fixation device according to claim 1, characterized in that, The sleeve has an opening on its side wall, which extends along the axial direction of the sleeve and passes through both ends of the sleeve, so as to allow the tube body to be inserted into the sleeve.

3. The kraft catheter sheath protection and fixation device according to claim 1, characterized in that, The retaining base includes: A base plate, said base plate being adapted to be bonded and fixed to the patient's body surface; Two opposing clamping plates are fixedly mounted on the base plate and define the clamping cavity. An entry point communicating with the clamping cavity is formed between the upper ends of the two clamping plates, so that the external fixing member can be inserted into the clamping cavity.

4. The kraft catheter sheath protection and fixation device according to claim 3, characterized in that, A slot is provided on each side of one end of the holding cavity. When the external fixing member is inserted into the holding cavity, the two fixing wings are positioned and engaged with the slots on the two side walls of the holding cavity.

5. The kraft catheter sheath protection and fixation device according to claim 3, characterized in that, The external fastener includes a first fixing section and a second fixing section, and the two fixing wings are symmetrically arranged between the first fixing section and the second fixing section. The sleeve has a connected straight section and a first expansion section. The straight section is adapted to be sleeved on the tube body, and the diameter of the first expansion section is larger than that of the straight section and is adapted to be sleeved on the first fixed section. When the external fastener is inserted into the holding cavity, the second fixing segment and the two fixing wings are located within the holding cavity.

6. The kraft catheter sheath protection and fixation device according to claim 5, characterized in that, The sleeve also has a second expansion section connected to the first expansion section, the second expansion section being adapted to be fitted over the outside of the second fixed section to completely cover the second fixed section.

7. The kraft catheter sheath protection and fixation device according to claim 4, characterized in that, The retaining cavity has elastic strips on both sides at one end, the retaining groove is provided on the elastic strip, and the upper end of the elastic strip has a guide slope for guiding the fixing wing.

8. The kraft catheter sheath protection and fixation device according to claim 6, characterized in that, The inner wall of the card plate is provided with a buckle, and the second expansion section is provided with a buckle hole that engages with the buckle, so that the sleeve is fixed relative to the card holder.

9. The kraft catheter sheath protection and fixation device according to claim 1, characterized in that, The inner wall of the sleeve is provided with interlocking teeth, which extend circumferentially along the sleeve to clamp the tube body inserted into the sleeve.

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