Subcutaneous embedded PICC (peripherally inserted central catheter)
By designing a PICC catheter buried in the skin, using vascular and puncture components, the problem of trauma and infection risk of traditional devices on subcutaneous tissue is solved, faster healing and lower foreign body sensation are achieved, and patients' quality of life is improved.
Patent Information
- Application Number
- CN202420040090.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-08
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-01-08
AI Technical Summary
Traditional intrathecal drug continuous infusion devices, such as implantable drug delivery pumps and PICC catheters, have high costs, high risks and infection risks, affecting the patient's quality of life, and traumatizes subcutaneous tissues during implantation and removal, and heals Long time, strong sense of foreign objects.
A PICC catheter buried in the subcutaneous skin is designed, using a subcutaneous blood vessel and a puncture component. One end of the subcutaneous blood vessel is blocked and the other end is connected to the catheter. The puncture part is an elastic puncture-resistant material. The catheter is implanted subcutaneously and the injection needle is percutaneously tilted. The puncture part is inserted, and the drug is administered through the catheter. After the injection, the puncture part is sealed. The catheter and the subvascular vessel are tightly sealed through the clamping part and the fixing component to reduce the probability of disengagement.
It reduces trauma to subcutaneous tissue, shortens the operation time, improves the skin healing speed, reduces the risk of infection, reduces the sense of foreign body, improves the quality of life of patients, and is convenient to operate and has low production costs.
Smart Images
Figure CN222150644U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of drug delivery devices, in particular to a PICC catheter buried subcutaneously. Background Art
[0002] Continuous intrathecal drug infusion is a way to treat cancer pain and relieve other chronic pain. The principle is: the drug delivery end of the intrathecal catheter is buried in the subarachnoid space, connected to the drug delivery device in the body through a subcutaneous tunnel, and the drug delivery device infuses the analgesic into the subarachnoid space, acting on the spinal cord site to achieve the purpose of pain relief. Traditional infusion methods often use implantable drug delivery pumps or PICC catheters as drug delivery devices for continuous drug delivery, but implantable drug delivery pumps are expensive and have high risks, so patients will be more cautious when choosing them. PICC is an exposed connector, which is prone to infection and tube dislocation, adding psychological burden to patients and affecting their quality of life. At present, in actual treatment, an infusion port connected to an external analgesic pump is usually selected as a drug delivery device.
[0003] The infusion port is a fully implanted, closed infusion system buried in the human body. The system includes a catheter with the end connected to an injection seat. The administration end of the catheter is placed in the target area through subcutaneous puncture in the chest cavity during surgery. The other end of the catheter is connected to the injection seat, which is placed in the subcutaneous tissue near the chest cavity and sutured. After the operation, a small suture wound is left outside the skin. After the stitches are healed and removed, a protruding ball can be felt on the surface of the chest cavity. During treatment, the needle is inserted into the reservoir of the injection seat through percutaneous puncture, and the drug solution is accurately delivered to the area where the administration end of the catheter is located through the catheter.
[0004] The Chinese utility model patent with publication date of December 02, 2022 and publication number CN217938823U proposes an infusion port drug delivery device, which includes an injection seat, a catheter, a metal connecting tube and a clamping cap, the metal connecting tube is fixed on the injection seat, and a catheter is installed on the outside, and the outside of the catheter is clamped and sealed by a clamping cap; the clamping cap includes a buckle and a sleeve, a through hole is provided inside the sleeve, and a buckle is provided at the front end, the catheter is fixed inside the through hole, and the sleeve and the buckle are integrally formed.
[0005] In the specific operation, the catheter is first implanted into the subarachnoid space through the chest subcutaneous, and after the catheter is connected and installed on the metal connecting tube, the catheter is put into the compression cap until the through hole of the compression cap and the metal connecting tube are clamped and sealed, and then the injection seat is placed in the subcutaneous tissue of the chest and sutured. During treatment, the needle is inserted into the injection seat through percutaneous puncture, and the drug is continuously administered through the infusion port through an external analgesic pump. When replacing, a surgical operation is required to disconnect the catheter from the injection seat and remove the injection seat.
[0006] With respect to the above technical solution, the implantable infusion port is large in size and will cause significant trauma to the subcutaneous tissue during implantation and removal. The skin takes a long time to heal and the foreign body sensation is strong, which reduces the patient's quality of life. Utility Model Content
[0007] In order to reduce the trauma to subcutaneous tissue, the utility model provides a PICC catheter buried subcutaneously.
[0008] The PICC catheter embedded subcutaneously provided by the utility model adopts the following technical scheme:
[0009] The PICC catheter buried subcutaneously comprises a catheter and a puncture assembly, wherein the puncture assembly comprises a substitute blood vessel and a puncture part, wherein one end of the substitute blood vessel is blocked and the other end is connected to the catheter, and the puncture part is connected to the end of the substitute blood vessel away from the catheter.
[0010] By adopting the above technical scheme, a catheter is implanted subcutaneously to the target area, the substitute blood vessel is placed in the subcutaneous tissue and sutured and fixed, and then the skin is sutured and fixed. The puncture part is made of elastic puncture-resistant material. During treatment, the injection needle is inserted into the puncture part through oblique puncture through the skin, and the extracorporeal part of the injection needle is fixed. The injection needle continuously injects into the substitute blood vessel, and the drug is administered to the target area through the catheter. After the injection, the injection needle is removed, the puncture part is elastically deformed, and the needle hole is sealed. With this arrangement, the implantable substitute blood vessel is smaller in size, easier to operate than the infusion port, with lower production cost and shorter operation time. The trauma to the skin surface and subcutaneous tissue during implantation and removal is smaller, the skin heals faster, the risk of infection is reduced, the foreign body sensation is alleviated, and the quality of life of patients is improved.
[0011] Optionally, the diameter of the puncture portion is greater than the diameter of the substitute blood vessel.
[0012] By adopting the above technical solution, the injectable range is expanded, which is conducive to medical staff to find a suitable puncture point by pressing and other methods, and to adjust the puncture position and angle in time according to the placement position and angle of the substitute blood vessel, so as to facilitate rapid injection and easy operation.
[0013] Optionally, the substitute blood vessel is detachably connected to the catheter, and the puncture assembly also includes a clamping portion, which is arranged on the outer circumference of the substitute blood vessel near one end of the catheter, the catheter sleeve is arranged on the outer circumference of the clamping portion, and the catheter cover is arranged on the outer circumference of the substitute blood vessel.
[0014] By adopting the above technical scheme, a catheter is implanted subcutaneously to the target area, the catheter cover is arranged on the outer peripheral surface of the substitute blood vessel, and the clamping part of the substitute blood vessel is pushed into the catheter, so that the substitute blood vessel and the catheter are clamped and sealed, reducing the probability of the substitute blood vessel and the catheter being detached, and then the substitute blood vessel is placed in the subcutaneous tissue and sutured and fixed; when replacing the substitute blood vessel, a surgical operation is required to release the connection between the catheter and the substitute blood vessel, take out the substitute blood vessel, replace the next substitute blood vessel, connect the substitute blood vessel and the catheter, so that the substitute blood vessel and the catheter are clamped and sealed, and then the substitute blood vessel is placed in the subcutaneous tissue and sutured and fixed; with this arrangement, the installation and replacement of the implantable substitute blood vessel is more convenient, easier to operate than the infusion port, the operation time is short, the psychological burden of the patient is reduced, and the quality of life of the patient is improved.
[0015] Optionally, an inclined surface is formed at one end of the clamping portion away from the substitute blood vessel.
[0016] By adopting the above technical solution, the catheter is implanted subcutaneously to the target area, the catheter cover is set on the outer peripheral surface of the substitute blood vessel, and the clamping part of the substitute blood vessel is pushed into the catheter. The catheter can move forward along the inclined surface of the clamping part to clamp and seal the substitute blood vessel and the catheter. Thereafter, the substitute blood vessel is placed in the subcutaneous tissue and sutured to fix. Such an arrangement facilitates the rapid covering of the catheter on the substitute blood vessel, improves the installation speed, facilitates rapid installation and replacement, is easier to operate than an infusion port, shortens the operation time, and improves the patient's quality of life.
[0017] Optionally, a fixing component is further provided on the catheter, and the fixing component includes a ferrule and a clamping block. The ferrule is sleeved on the outer circumference of the catheter, and the clamping block is provided on the inner circumference of the ferrule. The clamping block can be clamped with the clamping part.
[0018] By adopting the above technical scheme, a catheter is implanted subcutaneously to the target area, a ferrule is set on the catheter, and then the catheter cover is set on the outer peripheral surface of the substitute blood vessel, and the clamping part of the substitute blood vessel is pushed into the catheter, and the ferrule is pushed in the direction of the substitute blood vessel, and after passing the clamping part, it is clamped with the substitute blood vessel, so that the substitute blood vessel and the catheter are clamped and sealed, and the probability of the substitute blood vessel and the catheter being detached is reduced, and then the substitute blood vessel is placed in the subcutaneous tissue and sutured and fixed; when replacing the substitute blood vessel, a surgical operation is required to release the installation of the ferrule, remove the ferrule, and release the connection between the catheter and the substitute blood vessel, take out the substitute blood vessel, replace the next substitute blood vessel, connect the substitute blood vessel and the catheter, and install the ferrule to further compress and seal the substitute blood vessel and the catheter, and then place the substitute blood vessel in the subcutaneous tissue and suture and fix it; such an arrangement improves the sealing of the substitute blood vessel and the catheter, improves the firmness of the connection, facilitates the rapid installation and replacement of the substitute blood vessel, shortens the operation time, and improves the quality of life of patients.
[0019] Optionally, an end of the block away from the catheter forms an inclined surface.
[0020] By adopting the above technical scheme, the catheter is implanted subcutaneously to the target area, the ferrule is placed on the catheter, and then the catheter cover is placed on the outer peripheral surface of the substitute blood vessel, and the clamping part of the substitute blood vessel is pushed into the catheter, and the ferrule is pushed in the direction of the substitute blood vessel, so that the clamping block on the ferrule moves forward along the inclined surface of the clamping part. Since the end of the clamping block away from the catheter is an inclined surface, the friction of the clamping block on the clamping part and the catheter during movement is reduced, the degree of wear is reduced, and the durability of the device is improved. At the same time, the installation is convenient and quick, and the operation time is short. After the clamping block passes over the clamping part, it is clamped with the substitute blood vessel, so that the substitute blood vessel and the catheter are clamped and sealed, and the ferrule is further fixed. Then the substitute blood vessel is placed in the subcutaneous tissue and sutured.
[0021] Optionally, the inner circumferential surface of the ferrule away from one end of the substitute blood vessel can abut against the end surface of the clamping portion away from one end of the substitute blood vessel.
[0022] By adopting the above technical scheme, the catheter is implanted subcutaneously to the target area, the ferrule is set on the catheter, and then the catheter cover is set on the outer peripheral surface of the substitute blood vessel, and the clamping part of the substitute blood vessel is pushed into the catheter, and the ferrule is pushed in the direction of the substitute blood vessel, so that the clamping block on the ferrule moves forward along the inclined surface of the clamping part, and is clamped with the substitute blood vessel after passing the clamping part, so that the substitute blood vessel and the catheter are clamped and sealed, and the inner peripheral surface of the ferrule away from the end of the substitute blood vessel can abut against the end surface of the clamping part away from the substitute blood vessel, limiting the distance of relative movement between the clamping part and the clamping block, making the ferrule not easy to fall off, while reducing processing errors, facilitating quick installation, reducing the probability of the ferrule falling off, and thus reducing the probability of the substitute blood vessel and the catheter being detached, and then the substitute blood vessel is placed in the subcutaneous tissue and sutured to fix.
[0023] Optionally, a groove is provided on the inner circumference of the ferrule away from one end of the catheter, and a buckle is also provided on the outer circumference of the substitute blood vessel, and the end of the ferrule close to the groove can be engaged with the buckle.
[0024] By adopting the above technical scheme, the catheter is implanted subcutaneously to the target area, the ferrule is set on the catheter, the buckle is installed on the substitute blood vessel, and then the catheter cover is set on the outer peripheral surface of the substitute blood vessel, and the clamping part of the substitute blood vessel is pushed into the catheter, and the ferrule is pushed in the direction of the substitute blood vessel, and after passing the clamping part, it is clamped with the substitute blood vessel, so that the substitute blood vessel and the catheter are clamped and sealed, and the buckle is moved in the direction of the ferrule, and is clamped and sealed with the clamping groove of the ferrule, and the ferrule is further fixed to reduce the probability of the ferrule falling off, thereby reducing the probability of the substitute blood vessel and the catheter being separated, and then the substitute blood vessel is placed in the subcutaneous tissue and sutured and fixed; when replacing the substitute blood vessel, a surgical operation is required to release the connection between the buckle and the ferrule, and release the connection between the catheter and the substitute blood vessel, remove the ferrule, take out the substitute blood vessel, replace the next substitute blood vessel, connect the substitute blood vessel and the catheter, and install the ferrule to further compress and seal the substitute blood vessel and the catheter, and then the substitute blood vessel is placed in the subcutaneous tissue and sutured and fixed.
[0025] In summary, the present invention includes at least one of the following beneficial technical effects:
[0026] 1. Subcutaneously implant the catheter to the target area, place the substitute blood vessel in the subcutaneous tissue and suture it. During treatment, insert the injection needle into the puncture site through an oblique puncture percutaneously, continuously inject the inside of the substitute blood vessel, and the drug is administered to the target area through the catheter. Through the setting of the substitute blood vessel and the puncture site, the implantable substitute blood vessel is smaller in size, easier to operate than the infusion port, with low production cost and short operation time. The trauma to the skin surface and subcutaneous tissue during implantation and removal is less, the skin heals quickly, the risk of infection is reduced, the foreign body sensation is alleviated, and the patient's quality of life is improved.
[0027] 2. By setting the diameter of the puncture part larger than the diameter of the substitute blood vessel, the injectable range of the puncture part is increased, which is conducive to medical staff to find a suitable puncture point by pressing and other methods, and adjust the puncture position and angle in time according to the placement position and angle of the substitute blood vessel, so as to facilitate rapid injection and easy operation.
[0028] 3. Install the fixing component on the catheter, then place the catheter cover on the outer circumference of the substitute blood vessel, push the clamping part of the substitute blood vessel into the catheter, push the fixing component in the direction of the substitute blood vessel, and the fixing component further fixes the puncture component and the catheter so that the substitute blood vessel and the catheter are clamped and sealed. Through the setting of the fixing component, the probability of the substitute blood vessel and the catheter being detached is reduced, the sealing between the substitute blood vessel and the catheter is improved, the firmness of the connection is improved, the rapid installation and replacement of the substitute blood vessel is facilitated, the operation time is shortened, and the quality of life of the patient is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.
[0030] Figure numerals: 1, catheter; 2, puncture assembly; 21, substitute blood vessel; 211, buckle; 22, puncture part; 23, fixing part; 24, clamping part; 3, fixing assembly; 31, ferrule; 311, slot; 32, block. DETAILED DESCRIPTION
[0031] The following combination Figure 1 The utility model is described in further detail.
[0032] This embodiment discloses a PICC catheter implanted subcutaneously. Figure 1 , including a catheter 1, a puncture component 2 and a fixing component 3. One end of the puncture component 2 is detachably connected to the catheter 1. The fixing component 3 is arranged on the catheter 1. The fixing component 3 is used to further fix the puncture component 2 and the catheter 1. The injection needle can be inserted into the puncture component 2 for drug administration, and the drug is delivered to the designated area through the catheter 1.
[0033] Reference Figure 1 The puncture assembly 2 includes a substitute blood vessel 21, a puncture part 22, a fixing part 23 and a clamping part 24. One end of the substitute blood vessel 21 is blocked, and the other end is connected to the catheter 1. The puncture part 22 is connected to the end of the substitute blood vessel 21 away from the catheter 1. The puncture part 22 surrounds the axis of the substitute blood vessel 21 for one week, and the puncture part 22 forms an arc surface protruding outward. The diameter of the end of the substitute blood vessel 21 close to the puncture part 22 is larger than the other end. The fixing part 23 is fixedly connected to the end of the substitute blood vessel 21 away from the catheter 1, and the diameter of the end of the fixing part 23 away from the substitute blood vessel 21 is smaller than the other end. The substitute blood vessel 21 is detachably connected to the catheter 1, and the clamping part 24 is fixedly connected to the outer peripheral surface of the substitute blood vessel 21 close to the end of the catheter 1. The catheter 1 is sleeved on the outer peripheral surface of the clamping part 24, and the catheter 1 is covered on the outer peripheral surface of the substitute blood vessel 21. The end of the clamping part 24 away from the substitute blood vessel 21 forms an inclined surface.
[0034] Reference Figure 1 The puncture portion 22, the fixing portion 23 and the clamping portion 24 are processed into one piece with the substitute blood vessel 21, and the color is dark blue. The fixing portion 23, the clamping portion 24 and the substitute blood vessel 21 are all made of silicone. The puncture portion 22 is a puncture-resistant material. The length of the substitute blood vessel 21 is 3-5 cm. In this embodiment, the length of the substitute blood vessel 21 is preferably 3.5 cm. The inner diameter of the substitute blood vessel 21 is 0.1-0.3 cm. In this embodiment, the inner diameter of the substitute blood vessel 21 is preferably 0.25 cm. The wall thickness of the substitute blood vessel 21 is 0.1-0.3 cm. In this embodiment, the wall thickness of the substitute blood vessel 21 is preferably 0.1 cm. The length of the puncture portion 22 is 1-2 cm. In this embodiment, the length of the puncture portion 22 is preferably 1.8 cm. The maximum inner diameter of the puncture portion 22 is 0.3-0.5 cm, and the maximum inner diameter of the puncture portion 22 in this embodiment is preferably 0.45 cm. The wall thickness of the puncture portion 22 is 0.1-0.3 cm, and the wall thickness of the puncture portion 22 in this embodiment is preferably 0.1 cm. The length of the fixing portion 23 is 0.3-0.7 cm, and the length of the fixing portion 23 in this embodiment is preferably 0.6 cm. The minimum outer diameter of the fixing portion 23 is 0.1-0.3 cm, and the minimum outer diameter of the fixing portion 23 in this embodiment is preferably 0.15 cm. The length, inner diameter and wall thickness of the substitute blood vessel 21, the length, inner diameter and wall thickness of the puncture portion 22, and the length and outer diameter of the fixing portion 23 can all be adjusted according to the model of the device or the age of the patient.
[0035] The catheter 1 is implanted subcutaneously to the target area, and the fixing component 3 is installed on the catheter 1. Then, the catheter 1 is covered on the outer peripheral surface of the substitute blood vessel 21, and the clamping part 24 of the substitute blood vessel 21 is pushed into the catheter 1. The fixing component 3 is pushed in the direction of the substitute blood vessel 21. The fixing component 3 further fixes the puncture component 2 and the catheter 1, so that the substitute blood vessel 21 and the catheter 1 are clamped and sealed, reducing the probability of the substitute blood vessel 21 and the catheter 1 being separated. Then, the substitute blood vessel 21 is placed in the subcutaneous tissue, and then the skin is sutured and fixed; during treatment, the injection needle is inserted into the puncture part 22 through percutaneous puncture, and the extracorporeal part of the injection needle is fixed. The injection needle is continuously injected into the inside of the substitute blood vessel 21, and the drug is injected into the target area through the catheter 1. After the medication and injection are completed, the injection needle is removed, and the puncture part 22 undergoes elastic deformation to seal the needle hole. With this arrangement, the implantable substitute blood vessel 21 is smaller in size, easier to operate than the infusion port, and has a shorter operation time. The trauma to the skin surface and subcutaneous tissue during implantation and removal is smaller, and the skin heals faster, thereby reducing the foreign body sensation and improving the patient's quality of life. Since the diameter of the puncture part 22 is larger than that of the substitute blood vessel 21, it is beneficial for medical staff to find a suitable puncture point by pressing or the like, which facilitates rapid injection. Since the diameter of the fixing part 23 at one end away from the substitute blood vessel 21 is smaller than that at the other end, it is beneficial to reduce the foreign body sensation caused by the fixing part 23 to the subcutaneous tissue and improve the patient's quality of life.
[0036] Reference Figure 1 The fixing component 3 includes a sleeve 31 and a clamping block 32. The sleeve 31 is sleeved on the outer circumferential surface of the catheter 1. The clamping block 32 is fixedly connected to the inner circumferential surface of the sleeve 31. The clamping block 32 can be clamped with the clamping portion 24. The end of the clamping block 32 away from the catheter 1 forms an inclined surface. The inner circumferential surface of the end of the sleeve 31 away from the substitute blood vessel 21 can abut against the end surface of the clamping portion 24 away from the substitute blood vessel 21. A clamping groove 311 is provided on the inner circumferential surface of the end of the sleeve 31 away from the catheter 1. A buckle 211 is also sleeved on the outer circumferential surface of the substitute blood vessel 21. The end of the sleeve 31 close to the clamping groove 311 can be clamped with the buckle 211.
[0037] The catheter 1 is implanted subcutaneously to the target area, the ferrule 31 is sleeved on the catheter 1, the buckle 211 is installed on the substitute blood vessel 21, and then the catheter 1 is covered on the outer peripheral surface of the substitute blood vessel 21, and the clamping part 24 of the substitute blood vessel 21 is pushed into the catheter 1, and the ferrule 31 is pushed in the direction of the substitute blood vessel 21, so that the clamping block 32 on the ferrule 31 moves forward along the inclined surface of the clamping part 24, and is clamped with the substitute blood vessel 21 after passing the clamping part 24, so that the substitute blood vessel 21 and the catheter 1 are clamped and sealed, and the inner peripheral surface of the ferrule 31 away from the end of the substitute blood vessel 21 can abut against the end surface of the clamping part 24 away from the substitute blood vessel 21, limiting the distance of relative movement between the clamping part 24 and the clamping block 32, preventing the ferrule 31 from falling off, and the buckle 211 is moved in the direction of the ferrule 31, and is tightly clamped with the clamping groove 311 of the ferrule 31. The ferrule 31 is sealed and further fixed to reduce the probability of the ferrule 31 falling off, thereby reducing the probability of the substitute blood vessel 21 being separated from the catheter 1, and then the substitute blood vessel 21 is placed in the subcutaneous tissue and sutured to fix; when replacing the substitute blood vessel 21, a surgical operation is required to release the connection between the buckle 211 and the ferrule 31, and release the connection between the catheter 1 and the substitute blood vessel 21, remove the ferrule 31, take out the substitute blood vessel 21, replace the next substitute blood vessel 21, connect the substitute blood vessel 21 and the catheter 1, and install the ferrule 31 to further fix it, and then place the substitute blood vessel 21 in the subcutaneous tissue and suture it; with this arrangement, the installation of the ferrule 31 is more convenient and the installation speed is faster, which improves the sealing between the substitute blood vessel 21 and the catheter 1, reduces the probability of the substitute blood vessel 21 being separated from the catheter 1, has a weak foreign body sensation, and improves the quality of life of patients.
[0038] The implementation principle of the PICC catheter buried subcutaneously in this embodiment is:
[0039] The catheter 1 is implanted subcutaneously to the target area, the ferrule 31 is placed on the catheter 1, the buckle 211 is installed on the substitute blood vessel 21, and then the catheter 1 is placed on the outer peripheral surface of the substitute blood vessel 21, and the clamping part 24 of the substitute blood vessel 21 is pushed into the catheter 1, and the ferrule 31 is pushed toward the substitute blood vessel 21, so that the clamping block 32 on the ferrule 31 moves forward along the inclined surface of the clamping part 24, passes over the clamping part 24 and clamps with the substitute blood vessel 21, so that the substitute blood vessel 21 and the catheter 1 are clamped and sealed, and the ferrule 31 is away from the substitute blood vessel The inner circumference of one end of the tube 21 can abut against the end face of the clamping part 24 away from the substitute blood vessel 21, limiting the relative movement distance between the clamping part 24 and the clamping block 32, preventing the ferrule 31 from falling off, and moving the buckle 211 toward the ferrule 31 to clamp and seal with the clamping groove 311 of the ferrule 31, further fixing the ferrule 31, reducing the probability of the ferrule 31 falling off, and further reducing the probability of the substitute blood vessel 21 and the catheter 1 being separated, and then placing the substitute blood vessel 21 in the subcutaneous tissue and suturing the skin to fix it;
[0040] During treatment, the injection needle is inserted into the puncture part 22 through percutaneous puncture, the extracorporeal part of the injection needle is fixed, and the injection needle is continuously injected into the substitute blood vessel 21, and the drug is administered to the target area through the catheter 1. After the injection is completed, the injection needle is removed, and the puncture part 22 undergoes elastic deformation to seal the needle hole;
[0041] When replacing the substitute blood vessel 21, a surgical operation is required to release the connection between the buckle 211 and the ferrule 31, release the connection between the catheter 1 and the substitute blood vessel 21, remove the ferrule 31, take out the substitute blood vessel 21, replace the next substitute blood vessel 21, connect the substitute blood vessel 21 and the catheter 1, and install the ferrule 31 to further compress and seal the substitute blood vessel 21 and the catheter 1, and then place the substitute blood vessel 21 in the subcutaneous tissue and suture it;
[0042] With such a configuration, the implantable blood vessel 21 is smaller in size, easier to operate than an infusion port, faster to replace, shorter in operation time, less trauma to the skin surface and subcutaneous tissue during implantation and removal, faster skin healing time, weaker foreign body sensation, and thus improves the patient's quality of life;
[0043] Since the diameter of the puncture part 22 is larger than that of the substitute blood vessel 21, it is convenient for medical staff to find a suitable puncture point by pressing and the like, and it is convenient for rapid injection. Since the diameter of the fixing part 23 at one end away from the substitute blood vessel 21 is smaller than that at the other end, it is helpful to reduce the foreign body sensation caused by the fixing part 23 to the subcutaneous tissue and improve the patient's quality of life.
[0044] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.
Claims
1. A subcutaneously implanted PICC catheter, characterized by: The invention comprises a catheter (1) and a puncture assembly (2), wherein the puncture assembly (2) comprises a substitute blood vessel (21) and a puncture portion (22), wherein one end of the substitute blood vessel (21) is blocked and the other end is connected to the catheter (1), and the puncture portion (22) is connected to the end of the substitute blood vessel (21) away from the catheter (1).
2. The subcutaneously implanted PICC catheter according to claim 1, characterized in that: The diameter of the puncture portion (22) is larger than the diameter of the substitute blood vessel (21).
3. The subcutaneously implanted PICC catheter according to claim 1, characterized in that: The blood vessel substitute (21) is detachably connected to the catheter (1), and the puncture assembly (2) further comprises a clamping portion (24), wherein the clamping portion (24) is arranged on the outer peripheral surface of the blood vessel substitute (21) near one end of the catheter (1), and the catheter (1) is sleeved on the outer peripheral surface of the clamping portion (24), and the catheter (1) is covered on the outer peripheral surface of the blood vessel substitute (21).
4. The subcutaneously implanted PICC catheter according to claim 3, characterized in that: An end of the clamping portion (24) away from the blood vessel substitute (21) forms an inclined surface.
5. The subcutaneously implanted PICC catheter according to any one of claims 1 to 4, characterized in that: The catheter (1) is further provided with a fixing assembly (3), the fixing assembly (3) comprising a clamping sleeve (31) and a clamping block (32), the clamping sleeve (31) being sleeved on the outer peripheral surface of the catheter (1), the clamping block (32) being provided on the inner peripheral surface of the clamping sleeve (31), and the clamping block (32) being capable of being clamped with the clamping portion (24).
6. The subcutaneously implanted PICC catheter according to claim 5, characterized in that: An end of the block (32) away from the catheter (1) forms an inclined surface.
7. The subcutaneously implanted PICC catheter according to claim 5, characterized in that: The inner peripheral surface of the ferrule (31) at one end away from the substitute blood vessel (21) can abut against the end surface of the clamping portion (24) at one end away from the substitute blood vessel (21).
8. The subcutaneously implanted PICC catheter according to claim 5, characterized in that: A slot (311) is provided on the inner circumference of the ferrule (31) at one end away from the catheter (1), and a buckle (211) is also provided on the outer circumference of the blood vessel substitute (21). The end of the ferrule (31) close to the slot (311) can be engaged with the buckle (211).