A device and method for solving the blockage of PICC delivery of parenteral nutrition

Abstract

The present application relates to the field of medical devices, and specifically provides a device and method for solving the blockage of PICC delivery of parenteral nutrition, including a catheter sleeve and a connecting tube, wherein the catheter sleeve is arranged on the catheter, and the connecting tube includes a connector and a connecting needle, wherein the connector and the connecting needle are arranged at one end of the connecting tube close to the catheter sleeve, and the connecting needle penetrates the catheter to connect the catheter and the connecting tube, and the catheter sleeve is locked in the connector to fix the catheter in the connecting tube. The problem in the prior art that the PICC needs to be unblocked by unblocking drugs or even the catheter needs to be pulled out and the device tube needs to be reinstalled after being blocked is solved, which reduces the patient's expenses, reduces the patient's pain, and also reduces the risk of surgery.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a device and method for solving the blockage of PICC delivering parenteral nutrition. Background Art

[0002] PICC (Peripherally Inserted Central Venous Catheter) is a method of inserting a catheter through a peripheral vein (basilic vein, median cubital vein, cephalic vein, great saphenous vein, etc.), with the tip of the catheter directly reaching the superior vena cava or inferior vena cava near the heart. It is suitable for patients who need repeated infusions, intravenous use of irritating drugs, hyperosmotic drugs, and poor peripheral vascular conditions. Parenteral Nutrition (TPN) mainly includes carbohydrates, fat emulsions, amino acids, vitamins, electrolytes, and trace elements. Nutritional support is one of the common comprehensive treatment methods in clinical practice, but due to the high concentration of the nutrient solution and its high permeability, it will irritate the blood vessels and easily increase the local vascular permeability and cause drug leakage. In order to protect blood vessels and reduce drug leakage, PICC is widely used in clinical PN infusion.

[0003] However, when PN is infused through PICC, due to the large molecular weight, viscosity, high concentration of PN, and the long time of PN infusion, the PICC catheter is easily completely or partially blocked. The blockage caused by PN is non-thrombotic blockage, not caused by blood. Once blocked, the probability of clinical recanalization is very low. The existing technology recommends the use of catheter clearers to clear the blockage, but in practice, not every hospital has recommended catheter clearers, and whether the clearer can be used depends on the patient's condition. Moreover, even if the recommended catheter clearer is used, it is not 100% successful, and the drug has a long action time. Unsuccessful treatment of catheter blockage leads to unplanned catheter extubation, affecting the patient's treatment, that is, directly removing the existing PICC and then re-catheterizing. Re-catheterization will not only make the patient spend extra money again, but also cause pain to the patient. Therefore, the patient may not cooperate when hearing that the catheter needs to be re-catheterized, which will delay the patient's treatment process and cause further harm to the patient.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide a device and method for solving the blockage of PICC delivery of parenteral nutrition, aiming to solve the problem of directly pulling out and re-inserting the PICC due to blockage in the prior art, and then solve the problem of PICC blockage without re-inserting the catheter, so as to avoid affecting the patient's treatment process.

[0006] The technical solution adopted by the present application to solve the technical problem is as follows: a device for solving the blockage of PICC delivery of parenteral nutrition, comprising:

[0007] A catheter sleeve, wherein the catheter sleeve is disposed on the catheter;

[0008] A connecting tube, the connecting tube includes a connecting head and a connecting needle, the connecting head and the connecting needle are arranged at one end of the connecting tube close to the catheter sleeve, the connecting needle penetrates the catheter to connect the catheter with the connecting tube, and the catheter sleeve is locked in the connecting head to fix the catheter in the connecting tube.

[0009] Furthermore, a plurality of locking teeth are provided at one end of the catheter sleeve close to the connecting pipe, and the locking teeth are circumferentially arranged on the outer ring of the catheter sleeve.

[0010] Furthermore, positioning grooves are formed between the locking teeth.

[0011] Furthermore, a locking hole is provided at one end of the catheter sleeve close to the connecting tube for the connecting tube to penetrate.

[0012] Furthermore, an adjustment tube is provided at one end of the catheter sleeve away from the connecting tube.

[0013] Furthermore, the connector includes a plurality of fixing springs, and the fixing springs penetrate into the locking holes to fix the catheter on the connecting needle.

[0014] Furthermore, the connector also includes a plurality of locking spring pieces, each of which is clamped in one of the positioning grooves to fix the catheter sleeve on the catheter.

[0015] Furthermore, the connecting tube also includes an injection tube, the connecting needle is connected to one end of the injection tube close to the catheter sleeve, and the connecting head is fixed to one end of the injection tube close to the catheter sleeve.

[0016] Furthermore, the connecting tube further comprises a handle and an injection port, wherein the handle is fixed on a side of the connecting head away from the catheter sleeve, and the injection port is arranged at an end of the injection tube away from the catheter sleeve.

[0017] A method for solving the blockage of PICC delivery of parenteral nutrition, using a device for solving the blockage of delivery of parenteral nutrition, the method comprising the following steps:

[0018] S01, cutting off the catheter and removing the original connecting tube that has been blocked;

[0019] S02, putting the catheter sleeve on the catheter, and making the catheter extend out of the locking hole;

[0020] S03, aligning the connecting tube with the catheter sleeve, and then inserting the connecting needle into the catheter;

[0021] S04, inserting the fixing spring sheet into the locking hole, and clamping the locking spring sheet on the positioning groove.

[0022] Beneficial effects:

[0023] The present application provides a device and method for solving the blockage of PICC delivery of parenteral nutrition, by setting the catheter sleeve on the catheter, ensuring that the catheter can be stably connected to the connecting tube. The specific connecting tube is connected to the catheter and the catheter sleeve through a connecting needle and a connector, and the connecting needle is connected to the catheter, so that the substance can be transported into the catheter through the connecting tube, and then the substance flows into the human body through the catheter. The catheter sleeve is locked in the connector, and the catheter can be fixed on the connecting tube through the action of the connector. Specifically, the catheter is fixed on the connecting needle to prevent the catheter from falling off from the connecting needle. At the same time, the connector can also fix the catheter sleeve on the catheter, thereby preventing the catheter sleeve from falling off while further strengthening the catheter fixed on the connecting needle. Therefore, the device and method in the present application can solve the problem of PICC being blocked during PN infusion, and the problem of blockage is solved by replacing the connecting tube, reducing the patient's expenses while alleviating the patient's pain, and also reducing the risk of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the catheter sleeve and the connecting pipe being connected in the embodiment of the present application;

[0025] Figure 2 This is a schematic diagram of a connecting pipe in an embodiment of the present application;

[0026] Figure 3 for Figure 2 A is an enlarged schematic diagram;

[0027] Figure 4 This is a schematic diagram of a connecting pipe in another embodiment of the present application;

[0028] Figure 5 for Figure 4 A magnified schematic diagram of B;

[0029] Figure 6 This is a schematic diagram of a catheter being inserted into a catheter sleeve in an embodiment of the present application;

[0030] Figure 7 This is a schematic diagram of another angle of the catheter being inserted into the catheter sleeve in the embodiment of the present application.

[0031] Description of reference numerals:

[0032] 1. Catheter sleeve; 11. Locking tooth plate; 111. Positioning groove; 12. Locking hole; 13. Adjustment tube; 2. Connecting tube; 21. Connecting head; 211. Fixing spring plate; 212. Locking spring plate; 213. Locking protrusion; 214. Catheter fixing piece; 22. Connecting needle; 23. Injection tube; 24. Handle; 25. Injection port; 3. Catheter. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present application clearer and more specific, the present application is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific examples described here are only used to explain the present application and are not used to limit the present application.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0035] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] The present invention provides a device and method for solving the blockage of PICC delivery of parenteral nutrition, such as Figures 1 to 7As shown, the present application includes a device for solving the blockage of PICC for delivering parenteral nutrition, which is used to directly replace the original connecting tube when the original catheter is blocked, because the blockage of PICC caused by delivering PN mainly occurs at the position of the connecting tube located outside. By replacing the connecting tube, the smooth flow of the catheter is ensured, and the situation that the catheter needs to be re-inserted due to the blockage of the catheter is avoided, which alleviates the patient's pain and reduces the patient's expenses. In order to determine whether the catheter 3 is blocked and whether it can be solved by replacing the connecting tube 2, it is first necessary to determine whether the catheter 3 is blocked. When the catheter 3 is blocked, blood cannot be withdrawn through the catheter or the blood reflux is slow, and when the catheter lumen cannot be flushed or liquid cannot be injected through the catheter, the infusion pump connected to the catheter often blocks the alarm. When the above situation occurs, observe whether the patient has nausea, vomiting, etc., or whether there is visible blood in the catheter 3. If the above situation occurs, it is a bloody blockage, and the method for solving the bloody blockage of the catheter is used to clear the catheter. If the above situation does not occur, it is because the blockage is caused by the injection of PN. At this time, it is also possible to observe the precipitation of yellow-white substances in the connecting tube 2. At this time, the method in this application can be used to solve the problem of catheter blockage caused by the injection of PN.

[0037] Because the cost of the existing connector is about 200 yuan, and when the PICC is blocked, the cost of the catheter clearer and other drugs used for unblocking plus the labor cost is more than 200 yuan, and the unblocking effect is not good. It is possible that after using the catheter clearer, the PICC is still blocked, and it is still impossible to continue to deliver drugs or other substances to the human body through the PICC. In addition, the catheter clearer and other drugs used for unblocking have side effects, which will have adverse effects on patients. In severe cases, it will aggravate the patient's condition and cause additional unnecessary pain to the patient. Moreover, when the unblocking fails, the tube can only be removed and then re-catheterized, but the cost of removing the tube and re-catheterizing the patient is more than 5 times the cost of the connecting tube. At the same time, there are surgical risks in removing the tube and re-catheterizing the patient. The removal and re-catheterization may fail, and may also cause the patient to be infected. Therefore, the process of removing the tube and re-catheterizing will also cause great pain to the patient. In contrast, the method of solving the blockage by replacing the connecting tube in this application basically has no hidden dangers, so that the surgical risk can be avoided, and the connection of the connecting tube is only one of the steps with lower risks in the PICC catheterization, and it will not cause additional pain to the patient.

[0038] Specifically, the device for solving the blockage of delivering parenteral nutrition comprises a catheter sleeve 1 and a connecting tube 2, such as Figure 4 and Figure 5As shown, the catheter sleeve 1 is sleeved on the catheter 3, so that the connecting tube 2 and the catheter 3 can be connected and the connection between the connecting tube 2 and the catheter 3 can be prevented from being disconnected, so that drugs can be injected into the catheter 3 through the connecting tube 2 or PN can be injected as in the present application, so that nutrition can be supplied intravenously as nutritional support for pre-operative and critically ill patients. The connecting tube 2 includes a connector 21 and a connecting needle 22, as shown in FIG. Figure 2 and Figure 3 As shown, the connector 21 and the connecting needle 22 are arranged at one end of the connecting tube 2 close to the catheter sleeve 1, and the connecting needle 22 penetrates the catheter 3 to connect the catheter 3 with the connecting tube 2, and the drugs and other substances injected into the connecting tube 2 flow into the catheter 3 through the connecting needle 22, and finally enter the human body. The catheter sleeve 1 and the connector 21 are locked to fix the catheter 3 in the connecting tube 2. At this time, the catheter 3 is fixed on the connecting needle 22 through the connecting tube 2, and the catheter sleeve 1 is fixed on the catheter 3 through the connecting tube 2, so as to prevent the connection between the catheter 3 and the connecting tube 2 from being disconnected when the patient moves or the positions of the catheter 3 and the connecting tube 2 change, so as to avoid contamination of the catheter 3, and thus avoid affecting the treatment of the patient. Therefore, when the PICC is blocked due to the injection of PN, the blockage problem can be solved by replacing the external connecting tube 2, so as to restore the unblocked state of the catheter 3 as soon as possible, and resume the treatment of the patient as soon as possible, so as to avoid adverse effects on the patient due to the long-term blockage of the catheter 3. In order to clear the catheter 3 again, the catheter 3 is first cut off and divided into two sections. One section of the catheter 3 is extended into the body, and the other section of the catheter 3 is still connected to the connecting tube 2. The catheter 3 with the connecting tube 2 fixed thereon is removed, and then the catheter sleeve 1 is sleeved on the end of the other section of the catheter 3 away from the human body, and then the connecting tube 2 is connected and fixed to the catheter sleeve 1, and the catheter 3 is connected to the connecting tube 2, thereby completing the replacement of the connecting tube 2.

[0039] Furthermore, in order to fix the catheter sleeve 1 on the catheter 3, a plurality of locking teeth 11 are provided at one end of the catheter sleeve 1 close to the connecting tube 2. The locking teeth 11 are arranged circumferentially on the outer ring of the catheter sleeve 1. In this embodiment, four locking teeth 11 are provided, and the locking teeth 11 are symmetrical with respect to the central axis of the catheter sleeve 1. At the same time, positioning grooves 111 are formed between the locking teeth 11, and correspondingly, the connector 21 is provided with a plurality of locking springs 212. When the connecting tube 2 penetrates the catheter sleeve 1, each locking spring 212 is clamped in a positioning groove 111, so that the catheter sleeve 1 is clamped on the catheter 3 by the locking spring 212. At the same time, the locking teeth 11 on both sides of the positioning groove 111 also limit the rotation of the locking spring 212 relative to the outer ring of the catheter sleeve 1, so as to avoid the rotation of the connecting head 21 due to the rotation of the locking spring 212, resulting in the catheter sleeve 1 falling off due to the rotation of the connecting head 21. In this embodiment, two locking springs 212 are provided, and the two locking springs 212 are symmetrical with respect to the central axis of the connector 21. In other embodiments, other numbers of locking teeth 11 and locking springs 212 may also be provided to better fix the catheter sleeve 1 on the catheter 3 and limit the sliding of the catheter sleeve 1 relative to the catheter 3.

[0040] In order to fix the catheter 3 on the connecting needle 22 after the connecting needle 22 penetrates the catheter 3 and prevent the catheter 3 from falling off from the connecting needle 22, a locking hole 12 is provided at one end of the catheter sleeve 1 close to the connecting tube 2 for the connecting tube 2 to penetrate and fix the catheter 3 on the connecting needle 22 through the connecting tube 2. Correspondingly, the connector 21 also includes a fixing spring 211, which is arranged between the locking springs 212. When the connecting tube 2 penetrates the catheter sleeve 1, the fixing spring 211 penetrates into the locking hole 12 to clamp the catheter 3, so that the catheter 3 is fixed on the connecting needle 22 and prevents the catheter 3 from falling off from the connecting needle 22. As can be seen from the above, when the connecting tube 2 is inserted into the catheter sleeve 1, the locking spring piece 212 first clamps the positioning groove 111 of the outer ring of the catheter sleeve 1, so that the catheter sleeve 1 as a whole shrinks inward, and when the catheter sleeve 1 shrinks inward, it clamps the fixed spring piece 211 in the catheter sleeve 1, and then the fixed spring piece 211 is clamped on the catheter 3. Through the double clamping action of the catheter sleeve 1 and the fixed spring piece 211, the catheter 3 is further prevented from falling off the connecting needle 22, and the stability of the injection process is maintained. In another embodiment, in order to strengthen the fixation between the catheter sleeve 1 and the connecting tube 2, a locking protrusion 213 is provided on the side of the fixed spring piece 211 facing the catheter sleeve 1, such as Figure 4 and Figure 5As shown, the locking protrusion 213 extends toward the direction of the fixed spring sheet, and a locking groove is provided at the position of the locking protrusion 213 on the inner wall of the catheter sleeve 1. When the connecting tube 2 penetrates the catheter sleeve 1, the locking protrusion 213 is inserted into the locking groove, so that the catheter sleeve 1 and the connecting tube 2 can no longer slide relative to each other, thereby fixing the catheter sleeve 1 and the connecting tube 2. Further, an adhesive layer is provided on the side of the locking protrusion 213 facing the locking groove, so as to better adhere the locking protrusion 213 to the locking groove, and prevent the locking protrusion 213 from falling off from the locking groove under the action of external force. Therefore, even when the catheter sleeve 1 is pulled, the catheter sleeve 1 and the connecting tube 2 will not slide relative to each other, and the catheter sleeve 1 will not fall off from the connecting tube 2 to cause the catheter sleeve 1 and the connecting tube 2 to be disconnected, thereby preventing the catheter 3 from falling off from the connecting needle 22 due to the disconnection between the catheter sleeve 1 and the connecting tube 2. In addition, in order to further fix the catheter 3 on the connecting needle 22, a catheter fixing piece 214 is further provided on the locking spring piece 212. The catheter fixing piece 214 is provided on the side of the locking spring piece 212 facing the catheter 3. When the locking spring piece 212 penetrates into the locking hole 12, under the dual action of the fixing spring piece 211 and the locking spring piece 212, the catheter fixing piece 214 further squeezes the catheter 3, so that the catheter 3 and the connecting needle 22 are fixed to each other. In order to further limit the movement of the catheter 3, an adhesive layer is provided on the side of the catheter fixing piece 214 facing the catheter 3. The catheter fixing piece 214 is adhered to the catheter 3 through the adhesive layer, so as to further prevent the catheter 3 from sliding out of the connecting needle 22 and the catheter fixing piece 214 under the action of external force, and further maintain the fixation of the catheter 3 and the connecting needle 22. Because when injecting into the catheter 3 through the connecting tube 2, the injected substance carries a certain pressure, which will drive the catheter 3 to slide in the direction of separating from the connecting tube 2, causing the catheter 3 to be disconnected from the connecting tube 2, so the catheter 3 can be further fixed on the connecting needle 22 of the connecting tube 2 by providing a locking protrusion 213 and a catheter fixing member 214, so as to prevent the injected substance with pressure from driving the catheter 3 to separate from the connecting tube 2, thereby ensuring the stable connection between the catheter 3 and the connecting tube 2.

[0041] When the catheter sleeve 1 is sleeved on the catheter 3, in order to avoid the catheter 3 led out from the end of the catheter sleeve 1 away from the connecting tube 2 due to the insufficient flexibility of the catheter sleeve 1, when the catheter sleeve 1 is moved, especially when the catheter sleeve 1 is rotated relative to the catheter 3 at the end away from the connecting tube 2, since the material of the catheter sleeve 1 is different from that of the catheter 3, generally speaking, in order to ensure that the catheter sleeve 1 is locked with the connecting tube 2, the material of the catheter sleeve 1 is harder than that of the catheter 3. Therefore, when the catheter sleeve 1 rotates relative to the catheter 3, the catheter 3 located at the end of the catheter sleeve 1 away from the connecting tube 2 will not rotate with the catheter sleeve 1, so that the catheter 3 here is squeezed by the catheter sleeve 1, and then the catheter 3 is bent. When the catheter 3 is bent, the cross-section will gradually shrink due to the bending, and finally the speed of the catheter 3 delivering PN is affected, which affects the delivery of PN to the patient and delays the patient's treatment process. In a more serious case, the catheter 3 may break at the bend due to excessive bending of the catheter 3. After the break, the catheter 3 will inevitably have a gap at the break. Not only will the material in the catheter leak from the gap at the break, but also the pathogens in the external environment will enter the catheter 3 through the gap at the break. Then the pathogens in the external environment will enter the patient's body through the catheter 3, causing further harm to the patient, causing additional pain to the patient, and affecting the subsequent treatment process. Therefore, in order to avoid the occurrence of this situation, the catheter 3 is prevented from bending when the catheter sleeve 1 moves as much as possible. The end of the catheter sleeve 1 away from the connecting tube 2 is provided with an adjustment tube 13. The adjustment tube 13 is made of soft material. When the catheter sleeve 1 is sleeved on the catheter 3, the catheter 3 first passes through the adjustment tube 13, then penetrates into the catheter sleeve 1, and finally passes out from the locking hole 12. Therefore, when the catheter sleeve 1 moves, the adjustment tube 13 can buffer the bending of the catheter 3, and then the adjustment tube 13 can protect the catheter 3 inside it, avoid excessive bending of the internal catheter 3, and thus prevent the catheter 3 from breaking due to excessive bending.

[0042] Furthermore, the connecting tube 2 also includes an injection tube 23, and the connecting needle 22 is connected to one end of the injection tube 23 close to the catheter sleeve 1. The connecting head 21 is fixed to the end of the injection tube 23 close to the catheter sleeve 1. The injection tube 23 is used to transmit substances that need to be injected. When the substance enters the injection tube 23, it flows into the catheter 3 through the connecting needle 22 and finally enters the patient's body. In order to be able to deliver the substance that needs to be injected into the injection tube 23, the connecting tube 2 also includes an injection port 25. The injection port 25 is set at the end of the injection tube 23 away from the catheter sleeve 1, and the substance is transported into the injection tube 23 through the injection port 25. In addition, in order to assist in inserting the connecting tube 2 into the catheter sleeve 1, the connecting tube 2 also includes a handle 24, and the handle 24 is fixed on the side of the connecting head 21 away from the catheter sleeve 1, so that the medical staff can operate the connecting tube 2, insert the connecting tube 2 into the catheter sleeve 1, and fix the connecting tube 2 and the catheter sleeve 1, that is, when the medical staff inserts the connecting tube 2 into the catheter sleeve 1, they grab the handle 24, align the connecting tube 2 with the catheter sleeve 1, and then insert the connecting tube 2 into the catheter sleeve 1.

[0043] The present application also includes a method for solving the blockage of PICC delivery of parenteral nutrition, and the following are the steps of the method:

[0044] S01, cutting off the catheter 3, and removing the original connecting tube 2 that has been blocked;

[0045] S02, sleeve the catheter sleeve 1 on the catheter 3, and make the catheter 3 extend out of the locking hole 12;

[0046] S03, align the connecting tube 2 with the catheter sleeve 1, and then insert the connecting needle 22 into the catheter 3;

[0047] S04 , insert the fixing spring piece 211 into the locking hole 12 , and clamp the locking spring piece 212 on the positioning groove 111 .

[0048] Specifically, first determine whether the catheter 3 is blocked due to PN injection. When the reason for the blockage of the catheter 3 is that the connecting tube 2 is blocked during the injection of PN, first put the patient in a suitable position, such as lying flat on the bed. At this time, the patient lies flat on the bed, and then puts the arm on the bed. At this time, a pad is placed under the limbs on the side of the catheter 3 to prevent substances from dripping on the patient's bed when the connecting tube is replaced. Then, after tearing off the dressing that fixes the PICC, disinfect the skin and catheter 3 according to the specifications to ensure that the entire replacement operation is in a sterile environment to prevent the patient from suffering from bacterial infection when replacing the connecting tube 2 and causing adverse effects on the patient. In addition, the PICC catheter 3 also needs to be exposed for a certain length. Specifically, the length of the connecting tube 2 is measured to be 0.7 cm. Once the connecting tube 2 is blocked, only 1 cm of the catheter 3 needs to be trimmed to replace the connecting tube 2. If the catheter 3 is exposed to 5 cm or more, the length of the catheter 3 in the body does not need to be changed, and the end of the catheter 3 located in the body is still in the superior vena cava; if the part of the catheter 3 located outside the body is within 5 cm, it is only necessary to pull the catheter 3 out of the body by 1 cm. Because the length of the superior vena cava is about 7 cm, the length of the connecting tube 2 is measured to be 0.7 cm, and the length of the trimmed catheter 3 is about 1 cm. Trimming 1 cm does not affect the use of the catheter 3. The replaced connecting tube 2 is tested for blockage by injecting physiological saline. White substances can be seen in some connecting tubes 2 with the naked eye. If the connecting tube 2 is completely or partially blocked, it means that the catheter is mainly blocked in the connecting tube 2. The main reason is that the connecting tube 2 has a small diameter and is made of stainless steel, so viscous substances are easy to be blocked in the connecting tube 2.

[0049] When the above-mentioned preparations are completed, the medical staff (such as intravenous therapy specialist nurses) who have passed the training assessment will replace the connecting tube 2. First, cut off the catheter 3 and remove the original connecting tube 2 that has been blocked. At this time, the disconnected end of the catheter 3 can be used to connect with the new connecting tube 2. After shortening the catheter 3 and removing the original connecting tube 2, the new catheter sleeve 1 is put on the catheter 3, and the catheter sleeve 1 is slid along the catheter 3 in the direction close to the human body, so that the catheter 3 extends from the locking hole 12 on the catheter sleeve 1, so that the catheter 3 is connected with the connecting needle 22. After the catheter sleeve 1 is put on, align the connecting tube 2 with the catheter sleeve 1, and then insert the connecting needle 22 into the catheter 3, so that the connecting tube 2 is connected with the catheter 3. When the connecting needle 22 is inserted into the catheter 3, the fixing spring piece 211 is simultaneously inserted into the locking hole 12 to clamp the catheter 3 so that the catheter 3 is fixed on the connecting needle 22. In addition, the locking spring piece 212 is clamped on the positioning groove 111 to clamp the catheter sleeve 1 on the connecting tube 2. Specifically, the catheter sleeve 1 is clamped on the fixing spring piece 211 to strengthen the clamping of the catheter 3 by the fixing spring piece 211. In addition, a locking protrusion is provided on the fixing spring piece 211, and a locking groove is provided at a corresponding position of the inner wall of the catheter sleeve 1. Therefore, when the connecting tube 2 is inserted into the catheter sleeve 1, the locking protrusion is stuck in the locking groove, so that the catheter sleeve 1 is fixed on the connecting tube 2, and the catheter sleeve 1 and the connecting tube 2 cannot slide against each other, thereby maintaining a stable connection between the catheter 3 and the connecting needle 22, thereby completing the replacement of the connecting tube 2.

[0050] After the connection tube 2 is replaced, the catheter 3 and the connection tube 2 can be gently pulled again. When the two are not loose, it means that the catheter 3 and the connection tube 2 are tightly connected. Then use a syringe to connect the injection port 25, and use the syringe to draw back blood. If there is blood return and the push injection is unobstructed, it means that the connection between the catheter 3 and the connection tube 2 is good. At this time, the infusion connector can be connected to the injection port 25, and finally, the PICC is properly fixed again with a suitable dressing according to the patient's skin condition. The cut original connection tube 2 is rinsed with physiological saline, and then the original connection tube 2 is pushed. When the original connection tube 2 is completely or partially blocked, it is further verified that the blocked part of the catheter 3 is in the connection tube 2.

[0051] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A device for solving the blockage of PICC delivery of parenteral nutrition, characterized in that: include: A catheter sleeve, wherein the catheter sleeve is arranged on the catheter; A connecting tube, the connecting tube includes a connecting head and a connecting needle, the connecting head and the connecting needle are arranged at one end of the connecting tube close to the catheter sleeve, the connecting needle penetrates the catheter to connect the catheter with the connecting tube, and the catheter sleeve is locked in the connecting head to fix the catheter in the connecting tube.

2. The device for solving the blockage of PICC delivery of parenteral nutrition according to claim 1, characterized in that: The catheter sleeve is provided with a plurality of locking teeth at one end close to the connecting pipe, and the locking teeth are circumferentially arranged on the outer circle of the catheter sleeve.

3. The device for solving the blockage of PICC delivery of parenteral nutrition according to claim 2, characterized in that: Positioning grooves are formed between the locking teeth.

4. The device for solving the blockage of PICC delivery of parenteral nutrition according to claim 3, characterized in that: The catheter sleeve is provided with a locking hole at one end close to the connecting pipe for the connecting pipe to penetrate.

5. The device for solving the blockage of PICC delivery of parenteral nutrition according to claim 3, characterized in that: An adjustment tube is provided at one end of the catheter sleeve away from the connecting tube.

6. The device for solving the blockage of PICC delivery of parenteral nutrition according to claim 4, characterized in that: The connector includes a plurality of fixing springs which penetrate into the locking holes to fix the catheter on the connecting needle.

7. The device for solving the blockage of PICC delivery of parenteral nutrition according to claim 6, characterized in that: The connector also includes a plurality of locking spring sheets, each of which is clamped in one of the positioning grooves to fix the catheter sleeve on the catheter.

8. The device for solving the blockage of PICC delivery of parenteral nutrition according to claim 7, characterized in that: The connecting tube also includes an injection tube, the connecting needle is connected to one end of the injection tube close to the catheter sleeve, and the connecting head is fixed to one end of the injection tube close to the catheter sleeve.

9. The device for solving the blockage of PICC delivery of parenteral nutrition according to claim 8, characterized in that: The connecting tube further comprises a handle and an injection port. The handle is fixed on a side of the connecting head away from the catheter sleeve, and the injection port is arranged at an end of the injection tube away from the catheter sleeve.

10. A method for solving the blockage of PICC for delivering parenteral nutrition, using the device for solving the blockage of PICC for delivering parenteral nutrition according to any one of claims 7 to 9, characterized in that: The method comprises the following steps: S01, cutting off the catheter and removing the original connecting tube that has been blocked; S02, putting the catheter sleeve on the catheter, and making the catheter extend out of the locking hole; S03, aligning the connecting tube with the catheter sleeve, and then inserting the connecting needle into the catheter; S04, inserting the fixing spring sheet into the locking hole, and clamping the locking spring sheet on the positioning groove.

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