Venous catheter protection device and operation method

Abstract

The invention relates to the technical field of medical auxiliary equipment, in particular to a venous catheter protection device and an operation method. The venous catheter protection device comprises a sheath arranged at a puncture point of the venous catheter. And the sheath is constructed to form an annular coating structure at the puncture point of the venous catheter by using the elastic layer. The elastic layer is configured to have elasticity only in the radial direction of the annular coating structure. The fixing part on the easy-to-tear layer is configured to tear the easy-to-tear layer along the radial direction of the annular coating structure, and the easy-to-tear layer is stretched and then is connected with the adhesive layer, so as to form U-shaped fixation on the extension tube of the venous catheter. And the traction part is configured to tear the easy-to-tear layer along the axial direction of the annular coating structure to form a first traction belt and a second traction belt. The first traction belt is used for being pasted on the skin. The second traction belt is configured to be pulled in the direction away from the pasting position of the first traction belt, the elastic layer is driven to tension the skin around the puncture point through friction force, then the blood vessel is stretched, and the posture of the venous catheter is adjusted.

Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary equipment, and in particular to a venous catheter protection device and an operating method thereof. Background Art

[0002] Compared to traditional steel needle puncture, intravenous catheters can reduce repeated punctures and the risk of vascular damage. They are particularly suitable for patients who require long-term infusions or have poor vascular conditions. They can effectively protect peripheral veins, avoid vascular damage caused by multiple punctures, and maintain good vascular access for subsequent treatment. This not only reduces patient pain but also improves nursing efficiency. Especially in emergency situations such as first aid, intravenous access can be quickly established, buying patients valuable treatment time.

[0003] For example, placing an IV catheter in the hand involves the following procedure: With one hand, the healthcare provider secures the stylet, while with the other hand, they slowly insert the catheter into the blood vessel. The tourniquet is then released and the stylet is withdrawn. Subsequently, a transparent dressing or protective film is applied tension-free around the puncture site to secure the catheter. The extension tube is then secured in a U-shaped position. The heparin cap or needleless connector should be positioned above the puncture site, and adhesive tape should be used for additional securement if necessary.

[0004] However, since patients inevitably move their limbs while the catheter is in place, any external force pulling on one side of the extension tube's U-shaped fixing structure can easily cause the entire catheter to shift position. Furthermore, the extension tube is attached to the skin with adhesive tape, which lacks firmness. To ensure the stability of the U-shaped fixing structure, medical staff typically tape the extension tube in a circular manner. This increases the difficulty of deploying the U-shaped fixing structure and the difficulty of each intravenous injection.

[0005] Furthermore, because indwelling catheters are flexible tubes placed in blood vessels, they can fold as the skin and blood vessels contract, which can easily affect the effectiveness of intravenous injections. Currently, before administering an intravenous injection through an indwelling catheter, medical staff typically stretch the blood vessels by pulling on the skin around the puncture site, thereby adjusting the catheter's position to facilitate smoother drug delivery.

[0006] The above-mentioned method of pulling the skin around the puncture site will cause obvious pain to the patient. The puncture site itself is relatively sensitive. During the skin-lifting process, the skin is pulled by external force, which will stimulate the surrounding nerve endings and cause the patient to have a sharp pain. This is especially true for children, the elderly or patients who are more sensitive to pain. In addition, the above-mentioned operation method has high technical difficulty. If the medical staff does not operate properly, it is easy to cause the indwelling catheter to shift or even fall out of the blood vessel. Not only will it cause the infusion to be interrupted and affect the treatment effect, it may also cause adverse consequences such as local tissue swelling and drug extravasation, requiring re-puncture, which increases the patient's pain and the workload of medical staff.

[0007] In summary, the existing indwelling catheter has the following technical problems: the U-shaped fixation of the extension tube is easily caused by external force, causing the indwelling catheter to shift; the adhesive tape is not firm and difficult to operate; the indwelling catheter is a soft tube that is easy to fold and affects the effect of intravenous injection; pulling the skin to adjust the catheter posture before intravenous injection will cause obvious pain to the patient; the technical difficulty is high and it is easy to cause the catheter to shift or fall out, which needs to be solved urgently. Summary of the Invention

[0008] In view of the above technical problems, a first aspect of the present invention provides a venous catheter protection device, comprising a sheath arranged at a puncture point of the venous catheter; The sheath comprises an elastic layer, an adhesive layer and an easy-to-tear layer, wherein the adhesive layer is located between the elastic layer and the easy-to-tear layer, and the sheath is configured to form an annular covering structure around the puncture point of the intravenous catheter by utilizing the elastic layer; The elastic layer is configured to be stretchable only in the radial direction of the annular covering structure; The easy-to-tear layer is provided with a fixing portion and a pulling portion; The fixing portion is configured to tear the easy-tear layer radially along the annular covering structure, stretch it, and then connect it to the adhesive layer to form a U-shaped fixation for the extension tube of the intravenous catheter; The pulling portion is configured to tear the easy-tear layer along the axial direction of the annular covering structure to form a first pulling band and a second pulling band. The first pulling band is used to be adhered to the skin, and the second pulling band is configured to be pulled in a direction away from the adhesion point of the first pulling band, driving the elastic layer to use friction to tighten the skin around the puncture point, thereby stretching the blood vessels and adjusting the posture of the intravenous catheter.

[0009] Preferably, an airbag layer is provided between the elastic layer and the adhesive layer. The airbag layer is configured to be connected to an external inflation device via a connecting conduit and to expand as driven by the external inflation device to provide auxiliary support to the fixing portion.

[0010] Preferably, a one-way conducting valve is provided in the connecting conduit, and the one-way conducting valve is configured to allow the connecting conduit to flow air into the airbag layer in a one-way manner.

[0011] Preferably, a sealing layer is provided on the inner side of the elastic layer, and the sealing layer is arranged at the end of the sheath. The sealing layer is configured to be adhered and adsorbed on the skin, forming a closed and waterproof layer at the end of the sheath.

[0012] Preferably, an observation port is provided on the side wall of the sheath, and the observation port is configured to expose the intravenous catheter puncture point covered with a transparent protective film.

[0013] Preferably, a plurality of fixing portions are provided on the easy-to-tear layer, and the plurality of fixing portions are arranged in a linear array along the axial direction of the annular covering structure.

[0014] Preferably, the elastic layer is made of waterproof and breathable material.

[0015] A second aspect provides a method for operating the aforementioned venous catheter protection device, comprising the following steps: Before using the intravenous catheter protection device, ensure that the puncture site has been routinely disinfected and the intravenous catheter has been correctly inserted; The sheath is installed by stretching the sheath radially to wrap the elastic layer of the sheath on the skin, so that the sheath forms an annular covering structure around the puncture point. The elastic layer is stretchable only in the radial direction of the annular covering structure, so that the sheath is firmly attached to the skin around the puncture point. The extension tube is fixed by tearing the easy-tear layer along the radial direction of the annular covering structure. After tearing, the torn part is stretched to connect with the adhesive layer to form a fixing part. The fixing part is used to form a U-shaped fixation on the extension tube of the intravenous catheter, effectively preventing the extension tube from being displaced by external force, thereby ensuring the firm fixation of the extension tube; Skin traction and blood vessel stretching: When an intravenous channel needs to be established, the easy-to-tear layer is torn along the axial direction of the annular covering structure to form a first traction belt and a second traction belt. The first traction belt is pasted on the skin, and then the second traction belt is pulled in a direction away from the pasting point of the first traction belt. During the traction process, the elastic layer will use friction to tighten the skin around the puncture point, thereby stretching the blood vessels. Before intravenous injection, the posture of the intravenous catheter can be adjusted.

[0016] Preferably, the operating method of the above-mentioned venous catheter protection device also includes auxiliary support operation for the fixing part, connecting one end of the connecting catheter to the air outlet of the external inflation device, turning on the external inflation device, and adjusting the inflation volume at a slow and steady speed. As the gas is injected, the airbag layer will gradually expand. During the inflation process, closely observe the state of the fixing part and pay attention to the support of the airbag layer to the fixing part.

[0017] When the balloon layer expands to a certain extent, stop inflation and check whether the fixation effect of the fixed part on the intravenous catheter extension tube is enhanced by the auxiliary support of the balloon layer. Observe whether the extension tube is more stable and whether there is a new shift trend due to improper support. If it is found that the fixation effect is still not ideal, the inflation volume can be appropriately adjusted and checked again until a satisfactory auxiliary support effect is achieved to ensure that the fixed part can stably maintain the U-shaped fixed state of the extension tube.

[0018] Preferably, the operating method of the above-mentioned intravenous catheter protection device also includes a waterproof sealing operation of the end of the sheath, and the sealing layer located on the inner side of the elastic layer and at the sheath port is unfolded so that its area can cover the contact area between the sheath port and the surrounding skin, and then the sealing layer is slowly attached to the skin, starting from one end and gradually pressed toward the other end with gentle and uniform pressure to ensure that the sealing layer is tightly adhered and adsorbed to the skin. During the pasting process, wrinkles and bubbles in the sealing layer should be avoided.

[0019] Compared with the prior art, the venous catheter protection device and operation method provided by the present invention have the following outstanding substantive features and significant improvements: 1. This intravenous catheter protection device forms an annular covering around the puncture point through the elastic layer of the sheath, and uses the fixing part on the easy-tear layer to fix the extension tube in a U-shape, which greatly enhances the stability of the fixation and reduces the risk of catheter displacement due to external force. In addition, the adhesive layer is located between the elastic layer and the easy-tear layer. During operation, only the easy-tear layer needs to be peeled off, the sheath is installed at the puncture point, and then the corresponding operation is performed through the fixing part and the pulling part. The process is simple and clear, which reduces the difficulty of operation for medical staff.

[0020] 2. The intravenous catheter protection device adopts a reasonable structural design. The fixing portion formed by tearing the easy-tear layer along the radial direction of the annular covering structure is used to stably fix the extension tube, reducing the possibility of the catheter being folded due to accidental bending and twisting, ensuring the smoothness of the intravenous injection process, and improving the injection effect. In addition, the first and second traction belts formed by tearing the traction portion of the easy-tear layer are pulled. By pulling the second traction belt, the elastic layer is driven to tighten the skin, stretch the blood vessels, and adjust the catheter posture. This process is gentler than the traditional method, greatly reducing the patient's pain, while reducing the difficulty of technical operation and the risk of catheter displacement and dislocation.

[0021] 3. The intravenous catheter protection device is equipped with a sealing layer at the sheath port on the inner side of the elastic layer. The sealing layer can be adhered to the skin to form a closed and waterproof layer at the end of the sheath, effectively preventing moisture from invading the puncture point, reducing the risk of infection, and providing a safer use environment for patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the sheath covering area of a venous catheter protection device according to an embodiment of the present invention for placement of an intravenous catheter on the hand.

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of a venous catheter protection device in an embodiment of the present invention.

[0024] Figure 3 yes Figure 2 A schematic diagram of the three-dimensional structure of a venous catheter protection device from another perspective.

[0025] Figure 4 yes Figure 2 A schematic diagram of the cross-sectional structure of a venous catheter protection device.

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of a venous catheter protection device with an air bag layer in an embodiment of the present invention.

[0027] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure of a venous catheter protection device with an air bag layer.

[0028] Figure 7 This is a schematic diagram of the layout structure of the upper fixing portion of a venous catheter protection device in an embodiment of the present invention.

[0029] Figure 8 This is a schematic diagram of the layout structure of the upper fixing portion of another intravenous catheter protection device in an embodiment of the present invention.

[0030] Figure numerals: 1. extension tube; 2. sheath; 3. sealing layer; 21. elastic layer; 22. adhesive layer; 23. easy-tear layer; 24. fixing part; 25. first traction belt; 26. second traction belt; 27. airbag layer; 28. connecting catheter; 29. observation port. DETAILED DESCRIPTION

[0031] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] In an embodiment of the present invention, a venous catheter protection device is proposed, which aims to solve the technical problems of existing indwelling needles, such as the U-shaped fixation of the extension tube is easy to cause the indwelling catheter to shift due to external force, the adhesive tape is not firm and difficult to operate, the indwelling catheter is a soft tube that is easy to fold and affects the effect of intravenous injection, and pulling the skin to adjust the catheter posture before intravenous injection will cause obvious pain to the patient, and the high technical difficulty can easily cause the catheter to shift and fall out.

[0033] The venous catheter protection device proposed in the embodiments of the present invention uses the elastic layer of the sheath to form an annular covering around the puncture site. The extension tube is fixed in a U-shaped manner using the fixing portion of the easy-tear layer. The airbag layer provides auxiliary support for the fixing portion when necessary, significantly enhancing the stability of the fixation and reducing the risk of catheter displacement due to external forces. Furthermore, the adhesive layer is located between the elastic layer and the easy-tear layer. Operation requires only removing the easy-tear layer, installing the sheath at the puncture site, and then performing the corresponding operations using the fixing and pulling portions. This simple and straightforward process reduces the operational complexity for medical personnel. At the same time, the fixing portion formed by tearing the easy-tear layer radially along the annular covering structure is used to stably fix the extension tube, reducing the possibility of the catheter being folded due to accidental bending or twisting, ensuring the smoothness of the intravenous injection process, and improving the injection effect; and, the first and second traction belts formed by tearing the traction portion of the easy-tear layer, by pulling the second traction belt, the elastic layer is driven to tighten the skin, stretch the blood vessels, and adjust the catheter posture. Compared with the traditional method, this process is gentler, greatly reduces the patient's pain, and at the same time reduces the difficulty of technical operation and the risk of catheter displacement and dislocation.

[0034] like Figure 1 As shown, a venous catheter protection device includes a sheath 2 arranged at the puncture point of the venous catheter.

[0035] like Figure 2 Combine Figure 4 As shown, the sheath 2 includes an elastic layer 21, an adhesive layer 22 and an easy-to-tear layer 23. The adhesive layer 22 is located between the elastic layer 21 and the easy-to-tear layer 23. The sheath 2 is configured to form an annular covering structure around the puncture point of the intravenous catheter using the elastic layer 21.

[0036] The elastic layer 21 is configured to be stretchable only in the radial direction of the annular covering structure.

[0037] like Figure 2 As shown, a fixing portion 24 and a pulling portion are provided on the easy-tear layer 23. The fixing portion 24 is configured to tear the easy-tear layer 23 radially along the annular covering structure, stretch it, and then connect it to the adhesive layer 22 to form a U-shaped fixation for the extension tube 1 of the intravenous catheter.

[0038] like Figure 3 As shown, the pulling portion is configured to tear the easy-tear layer 23 along the axial direction of the annular covering structure to form a first pulling band 25 and a second pulling band 26. The first pulling band 25 is intended to be adhered to the skin. The second pulling band 26 is configured to be pulled away from the point where the first pulling band 25 is adhered, driving the elastic layer 21 to tension the skin around the puncture point through friction, thereby stretching the blood vessels and adjusting the position of the intravenous catheter.

[0039] When the patient wears clothes, the intravenous catheter extension tube 1 is often rubbed frequently due to direct contact with the clothes and lack of effective support. Figure 5 Combine Figure 6 As shown, an airbag layer 27 is provided between the elastic layer 21 and the adhesive layer 22. The airbag layer 27 is configured to be connected to an external inflation device via a connecting conduit 28 and to expand as the external inflation device drives to provide auxiliary support to the fixing portion 24.

[0040] In this way, the airbag layer 27 is connected to the external inflation device via the connecting tube 28. When inflated, it expands and provides auxiliary support for the fixing portion 24, making the relatively soft and easily shaken extension tube 1 more firmly fixed. When the patient puts on and takes off clothes, the extension tube 1 is firmly supported by the fixing portion 24 under the auxiliary support of the airbag layer 27, and its position is not easily shifted by the contact or pulling of clothes.

[0041] Especially when clothing is being put on and taken off through the puncture site, the stable position of the extension tube 1 greatly reduces the chance of repeated friction between the clothing and the extension tube 1. For example, when putting on and taking off thick, rough clothing such as sweaters, the extension tube 1 can easily become entangled and rubbed by clothing fibers if it lacks effective support. However, with the auxiliary support of the airbag layer 27, the extension tube 1 is firmly fixed in a relatively safe position, significantly reducing the friction between the clothing and the extension tube 1, effectively preventing wear and tear of the extension tube 1 caused by long-term friction. This ensures the normal use of the intravenous catheter and reduces the pain and inconvenience caused to the patient by the need for re-puncture due to catheter damage.

[0042] According to some preferred embodiments of the present invention, a one-way valve is provided within the connecting conduit 28. The one-way valve is configured to allow air to flow from the connecting conduit 28 into the airbag layer 27 in a single direction. When medical personnel operate the external inflation device to inflate the airbag layer 27, they no longer need to worry about gas backflow leading to inaccurate inflation or the need for repeated inflation adjustments. The one-way valve ensures that each inflation operation directly affects the airbag layer 27, ensuring stable inflation. This simplifies the inflation process and improves operational efficiency. It also ensures the consistency and reliability of the auxiliary support provided by the airbag layer 27 to the fixing portion 24, providing medical personnel with a more convenient and stable operating experience.

[0043] For example, the external inflation device can be selected from manual air pumps or electric air pumps according to actual needs. In the use environment lacking an air pump, gas can also be injected into the airbag layer 27 by connecting conduit 28 through a syringe.

[0044] According to some preferred embodiments of the present invention, Figure 2 Combine Figure 3As shown, a sealing layer 3 is provided on the inner side of the elastic layer 21. The sealing layer 3 is arranged at the end of the sheath 2. The sealing layer 3 is configured to be adhered to the skin and form a closed and waterproof end at the end of the sheath 2.

[0045] Exposure to moisture at the puncture site, such as splashes from daily washing or accumulated sweat, can cause discomfort and even skin irritation, leading to itching, redness, and swelling. The waterproofing of the occlusive layer 3 prevents moisture from contacting the puncture site and surrounding skin, keeping the area dry and comfortable. This improves patient comfort during indwelling intravenous catheter placement and minimizes the impact of skin discomfort on daily life.

[0046] Furthermore, moisture intrusion can damage the internal structure of the IV catheter protection device. For example, moisture can cause the elastic layer 21 to lose its elasticity, affecting its ability to cover the puncture site; or it can reduce the viscosity of the adhesive layer 22, making the sheath 2 less secure. The waterproofing of the sealing layer 3 prevents these problems, extending the device's service life and ensuring its continued effective protection of the IV catheter, reducing the pain and financial burden on patients caused by frequent replacement of damaged devices.

[0047] like Figure 2 As shown, the sidewall of the sheath 2 is provided with an observation port 29, which is configured to expose the venous catheter puncture site, which is covered with a transparent protective film. Through the observation port 29 on the sidewall of the sheath 2, the venous catheter puncture site, covered with a transparent protective film, can be visually observed without removing the entire sheath 2. This facilitates medical personnel to readily inspect the puncture site for abnormalities such as bleeding, exudation, redness, swelling, and inflammation, allowing them to promptly identify potential problems and take appropriate measures, providing more timely protection for patient safety and helping to improve overall care quality and treatment effectiveness.

[0048] Furthermore, patients often worry about the condition of the puncture site during indwelling intravenous catheter placement. The observation port 29 allows patients to easily see the puncture site, understand its condition, and alleviate psychological anxiety. Furthermore, it eliminates the need for frequent and complex procedures required by medical staff for observation, reducing physical inconvenience, improving the patient's overall experience during treatment, and promoting better patient compliance.

[0049] like Figure 7 Combine Figure 8 As shown, a plurality of fixing portions 24 are provided on the easy-to-tear layer 23. The plurality of fixing portions 24 are arranged in a linear array along the axial direction of the annular covering structure.

[0050] Multiple fixing portions 24 are arranged in a linear array along the axial direction of the annular sheath structure, enabling U-shaped fixation of the intravenous catheter extension tube 1 at various locations. Compared to a single fixing portion 24, this multi-point fixation method more evenly distributes external forces, effectively resisting pull from all directions and significantly enhancing the stability of the extension tube 1. Even when the patient is frequently active and the extension tube 1 is subjected to complex external forces, catheter displacement is minimized, ensuring smooth intravenous delivery and ensuring effective treatment.

[0051] In medical settings, intravenous catheters come in a variety of sizes. The design of multiple fixing portions 24 makes the protective device more versatile, allowing medical staff to flexibly select the fixing portion 24 in the appropriate position for fixation based on the actual diameter of the intravenous catheter being used. For thinner-diameter catheters, a combination of fixing portions 24 with smaller spacing can be selected to achieve a tight fit; for thicker-diameter catheters, fixing portions 24 with larger spacing can be selected to ensure effective and comfortable fixation, thereby meeting the fixation requirements of various intravenous catheter diameters for different patients and treatment needs.

[0052] In clinical practice, patients' physical conditions, puncture sites, and specific circumstances during treatment vary. For example, due to the characteristics of limb movement in some patients, the extension tube 1 is susceptible to large external forces in a specific direction; or when performing certain special examinations and treatments, the extension tube 1 needs to be fixed at a specific angle. The linear array arrangement of multiple fixing portions 24 makes it possible to meet these diverse needs. Medical staff can select the fixing portion 24 in a targeted manner based on actual conditions and perform personalized fixation on the extension tube 1, improving the applicability of the device in complex medical scenarios.

[0053] When performing a fixation operation, medical staff have more options for maneuvering with multiple fixing sections 24. For situations such as a unique puncture point location or poor surrounding skin condition, they can avoid unsuitable areas and select a fixing section 24 in a suitable location for fixation, increasing operational flexibility and success rate. Furthermore, if a fixing section 24 proves to be unsatisfactory during fixation, it can be easily adjusted to an adjacent fixing section 24, eliminating the need to replace the entire protective device, saving both time and medical resources.

[0054] During the indwelling intravenous catheter, the securing position of the extension tube 1 may need to be adjusted based on the patient's recovery, changes in treatment plans, and so on. The design of multiple securing portions 24 facilitates maintenance and adjustment. Medical staff can easily remove or reattach the securing portions 24 in different locations to adjust the securing method and tightness of the extension tube 1, ensuring that the protective device consistently provides optimal securing of the intravenous catheter throughout the treatment process.

[0055] According to some preferred embodiments of the present invention, the elastic layer 21 is made of a waterproof and breathable material. For example, the elastic layer 21 is made of a polytetrafluoroethylene (PTFE) film, which has excellent waterproof properties and is impermeable to water droplets. Furthermore, its unique microporous structure allows water vapor molecules to pass through, achieving a breathable function.

[0056] The elastic layer 21 can also be coated with a polyurethane (PU) material. By adjusting the formulation and coating process, the waterproof and breathable properties of the material can be precisely controlled to meet the needs of different application scenarios. The material has good elasticity and flexibility, which can adapt to the requirements of the elastic layer 21 in various movements and deformations, while also having a certain degree of wear resistance and tear resistance.

[0057] In addition, the elastic layer 21 can also be made of special functional fabrics, such as nylon, polyester, or other materials that have been treated with a waterproof and breathable finish. These fabrics typically utilize special coating or lamination technology, which adds waterproof functionality while maintaining the original flexibility and breathability of the fabric. This provides excellent comfort and wearing experience, a soft feel, and excellent breathability, keeping the skin dry and cool.

[0058] The use of a venous catheter protection device proposed in an embodiment of the present invention includes the following steps: Before using the venous catheter protection device, it is necessary to ensure that the puncture site has been routinely disinfected and the venous catheter has been correctly punctured.

[0059] The sheath 2 is installed and stretched radially to wrap the elastic layer 21 of the sheath 2 on the skin, so that the sheath 2 forms an annular covering structure around the puncture point. The elastic layer 21 is stretchable only in the radial direction of the annular covering structure, so that the sheath 2 is firmly attached to the skin around the puncture point.

[0060] The extension tube 1 is fixed, and the easy-tear layer 23 is torn off along the radial direction of the annular covering structure. After tearing, the torn part is stretched to connect with the adhesive layer 22 to form a fixing portion 24. The fixing portion 24 is used to form a U-shaped fixation on the extension tube 1 of the intravenous catheter, effectively preventing the extension tube 1 from being displaced by external force, thereby ensuring the firm fixation of the extension tube 1.

[0061] Skin traction and blood vessel stretching. When it is necessary to establish an intravenous channel, the easy-to-tear layer 23 is torn along the axial direction of the annular covering structure to form a first traction belt 25 and a second traction belt 26. The first traction belt 25 is pasted on the skin, and then the second traction belt 26 is pulled in a direction away from the pasting point of the first traction belt 25. During the traction process, the elastic layer 21 will use friction to tighten the skin around the puncture point, thereby stretching the blood vessels. Before intravenous injection, the posture of the intravenous catheter can be adjusted.

[0062] In order to further improve the fixation stability of the extension tube 1, the operation method of the intravenous catheter protection device also includes an auxiliary support operation on the fixing part 24. One end of the connecting tube 28 is connected to the air outlet of the external inflation device, and the external inflation device is turned on. The inflation amount is adjusted at a slow and steady speed. As the gas is injected, the airbag layer 27 will gradually expand. During the inflation process, closely observe the state of the fixing part 24 and pay attention to the support of the airbag layer 27 on the fixing part 24.

[0063] When the balloon layer 27 expands to a certain extent, stop inflating and check whether the fixing effect of the fixing portion 24 on the intravenous catheter extension tube 1 is enhanced due to the auxiliary support of the balloon layer 27. Observe whether the extension tube 1 is more stable and whether there is any new displacement trend due to improper support. If it is found that the fixing effect is still unsatisfactory, the inflation amount can be appropriately fine-tuned and checked again until a satisfactory auxiliary support effect is achieved to ensure that the fixing portion 24 can stably maintain the U-shaped fixed state of the extension tube 1.

[0064] In order to further improve the waterproofness of the sheath 2, the operation method of the intravenous catheter protection device also includes a waterproof sealing operation of the end of the sheath 2. The sealing layer 3 located on the inner side of the elastic layer 21 and at the end of the sheath 2 is unfolded so that its area can cover the contact area between the end of the sheath 2 and the surrounding skin. The sealing layer 3 is then slowly attached to the skin, starting from one end and gradually pressed toward the other end with gentle and even pressure to ensure that the sealing layer 3 is tightly adhered and adsorbed to the skin. During the pasting process, wrinkles and bubbles in the sealing layer 3 should be avoided.

[0065] After the sealing layer 3 is applied, its sealing and waterproofing properties are inspected. Check for gaps by observing the contact between the edge of the sealing layer 3 and the skin. If conditions permit, gently sprinkle a small amount of clean water on the sealing layer 3 and surrounding area to observe whether water penetrates into the sheath 2. If leakage is detected, carefully inspect the leaking area, reapply the sealing layer 3, or perform local repairs on the problematic area to ensure a good sealing and waterproofing effect at the end of the sheath 2, effectively preventing water intrusion and ensuring hygiene and safety at the intravenous catheter puncture site.

[0066] The present invention is not limited to the specific technical solutions described in the above embodiments. In addition to the above embodiments, the present invention may also have other implementation methods. For those skilled in the art, any technical solutions formed by modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A venous catheter protection device, characterized in that: It includes a sheath (2) arranged at the puncture site of the intravenous catheter; The sheath (2) comprises an elastic layer (21), an adhesive layer (22) and an easy-tear layer (23), wherein the adhesive layer (22) is located between the elastic layer (21) and the easy-tear layer (23), and the sheath (2) is configured to form an annular covering structure at the puncture point of the venous catheter by utilizing the elastic layer (21); The elastic layer (21) is configured to have stretchability only in the radial direction of the annular covering structure; The easy-to-tear layer (23) is provided with a fixing portion (24) and a pulling portion; The fixing portion (24) is configured to tear the easy-to-tear layer (23) radially along the annular covering structure, stretch it, and then connect it to the adhesive layer (22), thereby forming a U-shaped fixation for the extension tube (1) of the intravenous catheter; The pulling portion is configured to tear the easy-to-tear layer (23) along the axial direction of the annular covering structure to form a first pulling band (25) and a second pulling band (26), wherein the first pulling band (25) is used to be attached to the skin, and the second pulling band (26) is configured to be pulled in a direction away from the attachment point of the first pulling band (25), thereby driving the elastic layer (21) to tighten the skin around the puncture point by friction, thereby stretching the blood vessel and adjusting the posture of the intravenous catheter.

2. The venous catheter protection device according to claim 1, characterized in that: An airbag layer (27) is provided between the elastic layer (21) and the adhesive layer (22). The airbag layer (27) is configured to be connected to an external inflation device via a connecting conduit (28) and to expand with the driving of the external inflation device to form auxiliary support for the fixing portion (24).

3. The venous catheter protection device according to claim 2, characterized in that: A one-way valve is provided in the connecting conduit (28), and the one-way valve is configured to allow the connecting conduit (28) to flow air into the airbag layer (27) in one direction.

4. The venous catheter protection device according to claim 1, characterized in that: A sealing layer (3) is provided on the inner side of the elastic layer (21), and the sealing layer (3) is arranged at the end of the sheath (2). The sealing layer (3) is configured to be adhered and adsorbed on the skin, forming a closed and waterproof layer at the end of the sheath (2).

5. The venous catheter protection device according to claim 1, characterized in that: An observation port (29) is provided on the side wall of the sheath (2), and the observation port (29) is configured to expose the intravenous catheter puncture point covered with a transparent protective film.

6. The venous catheter protection device according to claim 1, characterized in that: A plurality of fixing portions (24) are provided on the easy-to-tear layer (23), and the plurality of fixing portions (24) are arranged in a linear array along the axial direction of the annular covering structure.

7. The venous catheter protection device according to claim 1, characterized in that: The elastic layer (21) is made of a waterproof and breathable material.

8. The method for operating the venous catheter protection device according to any one of claims 1 to 7, characterized in that: include: Before using the intravenous catheter protection device, ensure that the puncture site has been routinely disinfected and the intravenous catheter has been correctly inserted; The sheath (2) is installed, and the sheath (2) is stretched radially to cover the elastic layer (21) of the sheath (2) on the skin, so that the sheath (2) forms an annular covering structure around the puncture point, and the elastic layer (21) is stretched only in the radial direction of the annular covering structure, so that the sheath (2) is firmly attached to the skin around the puncture point; The extension tube (1) is fixed, and the easy-tear layer (23) is torn off along the radial direction of the annular covering structure. After tearing, the torn portion is stretched so as to connect with the adhesive layer (22) to form a fixing portion (24). The fixing portion (24) is used to form a U-shaped fixation on the extension tube (1) of the intravenous catheter, effectively preventing the extension tube (1) from being displaced by external force, thereby ensuring the firmness of the fixation of the extension tube (1); Skin traction and blood vessel stretching: When it is necessary to establish an intravenous channel, the easy-to-tear layer (23) is torn along the axial direction of the annular covering structure to form a first traction belt (25) and a second traction belt (26). The first traction belt (25) is pasted on the skin, and then the second traction belt (26) is pulled in a direction away from the pasting point of the first traction belt (25). During the pulling process, the elastic layer (21) will use friction to tighten the skin around the puncture point, thereby stretching the blood vessels. Before intravenous injection, the posture of the intravenous catheter can be adjusted.

9. The method for operating the venous catheter protection device according to claim 8, characterized in that: The method further includes an auxiliary support operation for the fixing portion (24), wherein one end of the connecting conduit (28) is connected to the air outlet of the external inflation device, the external inflation device is turned on, and the inflation amount is adjusted at a slow and steady speed. As the gas is injected, the airbag layer (27) gradually expands. During the inflation process, the state of the fixing portion (24) is closely observed, and attention is paid to the support of the airbag layer (27) on the fixing portion (24); When the air bag layer (27) is expanded to a certain extent, the inflation is stopped, and the fixing effect of the fixing portion (24) on the venous catheter extension tube (1) is checked to see whether it is enhanced by the auxiliary support of the air bag layer (27). The extension tube (1) is observed to see whether it is more stable and whether there is a new displacement trend due to improper support. If it is found that the fixing effect is still not ideal, the inflation volume can be appropriately adjusted and checked again until a satisfactory auxiliary support effect is achieved to ensure that the fixing portion (24) can stably maintain the U-shaped fixed state of the extension tube (1).

10. The method for operating the venous catheter protection device according to claim 8, characterized in that: The method further includes sealing and waterproofing the end of the sheath (2), unfolding the sealing layer (3) located on the inner side of the elastic layer (21) and at the end of the sheath (2) so that its area can cover the contact area between the end of the sheath (2) and the surrounding skin, and then slowly attaching the sealing layer (3) to the skin, starting from one end and gradually pressing it toward the other end with gentle and even pressure, to ensure that the sealing layer (3) is tightly attached to the skin and adsorbed. During the attaching process, wrinkles and bubbles should be avoided in the sealing layer (3).

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