A mini midline catheter fixator

Abstract

The present invention belongs to the technical field of midline catheters. A mini midline catheter fixator disclosed by the present invention includes a cylindrical housing, and further includes a massage and fixation assembly disposed on the cylindrical housing and a catheter fixation assembly disposed on one side of the massage and fixation assembly; integrating a single air pump and a gas flow pipeline, realizing semi-automatic operation of the device. The air pump system can adapt to the thickness of the patient's arm by alternately inflating the airbag, thus easily fixing the device, while avoiding blood circulation disorders caused by long-term compression. In addition, this design can also provide a massage effect on the arm, effectively solving the problems of manual adjustment and fixation and long-term skin compression in the prior art. The function of the air pump is also reflected in being able to push a medical cotton pad to cover the puncture site to protect the wound from external contamination. By replacing the medical cotton pad, the fixator realizes reusability, overcoming the problem of resource waste caused by the disposable use of the fixator in the prior art.

Description

Technical Field

[0001] The present invention belongs to the technical field of midline catheters, and particularly relates to a mini midline catheter fixator. Background Art

[0002] A mini midline catheter is a peripheral intravenous infusion device between a short cannula and a mid-long catheter. It is usually placed in the superficial veins of the forearm using conventional puncture techniques, or in the deep veins in the middle of the upper arm using ultrasound-guided techniques, and its tip does not exceed the axilla. When a mini midline catheter is in use, a fixator is generally required to provide safety protection for the midline catheter to ensure the use effect. There are some problems with existing mini midline catheter fixators during use:

[0003] 1. It cannot be reused, causing a large waste.

[0004] 2. It is necessary to manually adjust the fixator according to the thickness of the patient's arm.

[0005] 3. Prolonged compression of the same area of skin can cause poor blood circulation.

[0006] Therefore, a mini midline catheter fixator that can be reused, can automatically adapt to arms of different thicknesses and does not cause poor blood circulation is needed to solve these problems. Summary of the Invention

[0007] In view of the above situation, to overcome the defects of the prior art, this solution ingeniously integrates a single air pump and a gas flow pipeline to achieve semi-automatic operation of the device. The air pump system can adapt to the thickness of the patient's arm by alternately expanding the airbag, thus easily fixing the device and avoiding blood circulation disorders caused by prolonged compression. In addition, this design can also provide a massage effect on the arm, effectively solving the problems of manual adjustment and long-term skin compression in the prior art. The air pump also functions to push a medical cotton pad to cover the puncture point to protect the wound from external contamination. By replacing the medical cotton pad, this fixator achieves reusability and overcomes the problem of resource waste caused by the disposable use of fixators in the prior art.

[0008] The technical solution adopted by the present invention is as follows: A mini midline catheter fixator includes a cylindrical housing, which serves as the framework of the entire fixator to provide structural stability, and also includes a massage and fixation component arranged on the cylindrical housing, a catheter fixation component arranged on one side of the massage and fixation component, and a storage component arranged on one side of the catheter fixation component. The massage and fixation component is connected to the storage component through a pipeline;

[0009] The massage fixing assembly includes an inflatable fixing unit arranged on the surface of the cylindrical shell and an air outlet commutation unit arranged inside the inflatable fixing unit. The inflatable fixing unit and the air outlet commutation unit are in transmission connection. The inflatable fixing unit includes an air pump fixedly arranged on the surface of the cylindrical shell, an air outlet pipe I fixedly arranged at the air outlet end of the air pump, and an air inlet pipe I fixedly arranged at the air inlet end of the air pump. The air pump is the power source, and it drives the airbag to expand by compressing air to achieve the fixing and massage functions;

[0010] The catheter fixing assembly includes a needle protection unit rotatably arranged on the surface of the cylindrical shell and a fixed catheter unit arranged on the surface of the cylindrical shell. The needle protection unit is connected to the air outlet pipe I through a pipeline, and the fixed catheter unit is connected to the air outlet pipe I through a pipeline.

[0011] As a preferred technical solution of this scheme, a first inflatable pipe is fixedly arranged in a through manner on the surface of the air outlet pipe I. A first airbag is fixedly arranged on the inner wall of the cylindrical shell. The first inflatable pipe communicates with the inside of the first airbag. A second inflatable pipe is fixedly arranged in a through manner on the air outlet pipe I. A second airbag is fixedly arranged on the inner wall of the cylindrical shell. The second inflatable pipe communicates with the inside of the second airbag. The first airbag and the second airbag are arranged alternately. A second air inlet pipe is fixedly arranged in a through manner on the surface of the air inlet pipe I. A second air outlet pipe is fixedly arranged in a through manner on the surface of the air outlet pipe I.

[0012] As a preferred technical solution of this scheme, the air outlet commutation unit includes a wheel cover fixedly arranged on the inner wall of the air outlet pipe I, an impeller rotatably arranged inside the wheel cover, a ventilation disc coaxially and fixedly arranged on the side wall of the impeller, and a partition fixedly arranged on the inner wall of the air outlet pipe I. The ventilation disc rotates coaxially with the impeller and has holes for directional air flow to achieve the alternating flow direction of the gas. The partition cooperates with the ventilation disc to ensure that the gas flows along a predetermined path.

[0013] As a preferred technical solution of this scheme, a short air inlet pipe is fixedly arranged in a through manner on the outer wall of the wheel cover. An air outlet pipe III is fixedly arranged on the outer wall of the wheel cover. One end of the air outlet pipe III communicates with the inside of the wheel cover, and the other end of the air outlet pipe III penetrates through the air outlet pipe I.

[0014] As a preferred technical solution of this solution, the needle protection unit includes a needle cap rotatably arranged on the surface of the cylindrical shell, an airbag three fixedly arranged on the bottom wall of the needle cap, an airbag four fixedly arranged on the bottom wall of the needle cap, and a medical cotton pad detachably arranged on the surface of the airbag three. The needle cap covers above the puncture point to protect the puncture site from contamination and collision. An air hole one is penetratively opened inside the needle cap. The other end of the air charging pipe one penetrates through the cylindrical shell and corresponds to the air hole one. The air hole one is communicated with the inside of the airbag three. An air hole two is penetratively opened inside the needle cap. The other end of the air charging pipe two penetrates through the cylindrical shell and corresponds to the air hole two. The air hole two is communicated with the inside of the airbag four. The airbag three and the airbag four alternately inflate to push the medical cotton pad to cover the puncture point and provide additional protection.

[0015] As a preferred technical solution of this solution, the fixed catheter unit includes a catheter bracket rotatably arranged on the surface of the cylindrical shell, a chute one fixedly arranged on one side of the catheter bracket, a telescopic rod one fixedly arranged on the cylindrical shell, and a slider two slidably arranged on the surface of the cylindrical shell. The catheter bracket is used to fix the catheter to ensure the stability and correct position of the catheter. The slider two controls the lifting of the catheter bracket to facilitate operations such as disinfection of the catheter and connection of the infusion set. The telescopic end of the telescopic rod one slides and rotates in the chute one. The inside of the telescopic rod one is communicated with the inside of the air outlet pipe two and the air inlet pipe two. The slider two corresponds to the air outlet pipe two and the air inlet pipe two.

[0016] As a preferred technical solution of this solution, the storage assembly includes a storage cover rotatably arranged on the surface of the cylindrical shell, a chute two fixedly arranged on one side of the storage cover, a telescopic rod two fixedly arranged on the cylindrical shell, and a slider three slidably arranged on the surface of the cylindrical shell. A storage space is provided under the storage cover, which can store medical cotton pads or other small medical supplies. The slider three is used to control the inflow and outflow of air and control the opening and closing of the storage cover. The telescopic end of the telescopic rod two slides and rotates in the chute two. The inside of the telescopic rod two is communicated with the inside of the air outlet pipe two and the air inlet pipe two. The slider three corresponds to the air outlet pipe two and the air inlet pipe two.

[0017] As a preferred technical solution of this solution, a slider one is slidably arranged oppositely on the needle cap, and a spring is fixedly arranged between the two slider ones.

[0018] After adopting the above structure, the beneficial effects of the present invention are as follows:

[0019] 1. Through the designed massage and fixation assembly, not only the catheter is fixed, but also the comfort of the patient is improved, which is particularly important for patients who need long-term catheter treatment. The design of the massage and fixation assembly also helps to promote local blood circulation and can play a certain positive role in preventing thrombus formation. Through the design of alternating inflation, skin injuries such as blisters and ulcers caused by long-term compression are reduced;

[0020] 2. The medical cotton pad covers the puncture site, providing additional protection against external contamination and collision. By designing a replaceable medical cotton pad, the fixator can be reused, reducing medical waste and lowering the long-term usage cost.

[0021] 3. Utilizing the air pump and airbag system, the fixator can automatically adapt to arms of different thicknesses without manual adjustment, improving the convenience of use.

[0022] 4. The air pump is used to drive the lifting of the catheter bracket, facilitating operations such as disinfection of the catheter and connection of the infusion set by medical staff.

[0023] 5. The design of the storage component facilitates the storage of medical supplies, meeting the diverse needs of patients and medical staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings are used to provide a further understanding of the solution, and form a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, but do not constitute a limitation to the present invention.

[0025] Figure 1 It is a schematic diagram of the overall structure of a mini midline catheter fixator of the present invention;

[0026] Figure 2 It is a schematic diagram of the connection structure of the air pump and the first air outlet pipe in the present invention;

[0027] Figure 3 It is a schematic diagram of the connection structure of the needle cap and the first slider in the present invention;

[0028] Figure 4 is Figure 3 an enlarged view of the partial structure at A in

[0029] Figure 5 It is a schematic diagram of the connection structure of the first airbag and the first air filling pipe in the present invention;

[0030] Figure 6 It is a schematic diagram of the connection structure of the second airbag and the second air filling pipe in the present invention;

[0031] Figure 7 It is a schematic diagram of the connection structure of the spring and the first slider in the present invention;

[0032] Figure 8 It is a schematic diagram of the connection structure of the first telescopic rod and the first sliding groove in the present invention;

[0033] Figure 9 It is a schematic diagram of the connection structure of the second telescopic rod and the second sliding groove in the present invention.

[0034] In the drawings: 1. Cylindrical shell;

[0035] 2. Massage and fixing component, 21. Air pump, 22. First air outlet pipe, 23. First inflation pipe, 24. Second inflation pipe, 25. Short intake pipe, 26. Second air outlet pipe, 27. First intake pipe, 28. Second intake pipe, 29. Wheel cover, 210. Impeller, 211. Ventilation disc, 212. Partition board, 213. First airbag, 214. Second airbag, 215. Third air outlet pipe;

[0036] 3. Catheter fixing component, 31. Catheter bracket, 32. Needle cap, 33. Third airbag, 34. Medical cotton pad, 35. Fourth airbag, 36. First air hole, 37. Second air hole, 38. First slider, 39. Spring, 310. First chute, 311. First telescopic rod, 312. Second slider;

[0037] 4. Storage component, 41. Storage cover, 42. Second chute, 43. Second telescopic rod, 44. Third slider. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0039] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0040] As Figures 1-9 shown, a mini midline catheter fixator includes a cylindrical housing 1, and also includes a massage and fixing component 2 arranged on the cylindrical housing 1, a catheter fixing component 3 arranged on one side of the massage and fixing component 2, and a storage component 4 arranged on one side of the catheter fixing component 3. The massage and fixing component 2 is connected to the storage component 4 through a pipeline;

[0041] The massage fixing component 2 includes an inflatable fixing unit arranged on the surface of the cylindrical housing 1 and an air outlet commutation unit arranged inside the inflatable fixing unit. The inflatable fixing unit and the air outlet commutation unit are in transmission connection. The inflatable fixing unit includes an air pump 21 fixedly arranged on the surface of the cylindrical housing 1, an air outlet pipe 22 fixedly arranged at the air outlet end of the air pump 21, and an air inlet pipe 27 fixedly arranged at the air inlet end of the air pump 21;

[0042] The catheter fixing component 3 includes a needle protection unit rotatably arranged on the surface of the cylindrical housing 1 and a fixed catheter unit arranged on the surface of the cylindrical housing 1. The needle protection unit is connected to the air outlet pipe 22 through a pipeline, and the fixed catheter unit is connected to the air outlet pipe 22 through a pipeline.

[0043] Among them, an air charging pipe 23 is fixedly arranged on the surface of the air outlet pipe 22 in a through manner. An airbag 213 is fixedly arranged on the inner wall of the cylindrical housing 1. The air charging pipe 23 communicates with the inside of the airbag 213. An air charging pipe 24 is fixedly arranged on the air outlet pipe 22 in a through manner. An airbag 214 is fixedly arranged on the inner wall of the cylindrical housing 1. The air charging pipe 24 communicates with the inside of the airbag 214. The airbags 213 and 214 are arranged alternately. An air inlet pipe 28 is fixedly arranged on the surface of the air inlet pipe 27 in a through manner. An air outlet pipe 26 is fixedly arranged on the surface of the air outlet pipe 22 in a through manner.

[0044] Among them, the air outlet commutation unit includes a wheel cover 29 fixedly arranged on the inner wall of the air outlet pipe 22, an impeller 210 rotatably arranged inside the wheel cover 29, an air exchange disc 211 coaxially and fixedly arranged on the side wall of the impeller 210, and a partition plate 212 fixedly arranged on the inner wall of the air outlet pipe 22.

[0045] Among them, an air inlet short pipe 25 is fixedly arranged on the outer wall of the wheel cover 29 in a through manner. An air outlet pipe 215 is fixedly arranged on the outer wall of the wheel cover 29. One end of the air outlet pipe 215 communicates with the inside of the wheel cover 29, and the other end of the air outlet pipe 215 penetrates through the air outlet pipe 22.

[0046] Working process: Start the air pump 21. The gas blown out by the air pump 21 can flow into the wheel cover 29 through the air inlet short pipe 25, thereby driving the impeller 210 to rotate. The rotation of the impeller 210 drives the air exchange disc 211 to rotate. The air flow can pass through the openings on the air exchange disc 211. Cooperating with the partition plate 212, the gas can alternately flow into the air charging pipes 23 and 24 and enter the airbags 213 and 214, realizing the alternate inflation of the airbags 213 and 214. Cooperating with the anti-slip particles on its surface, the cylindrical housing 1 can be fixed on the arm.

[0047] Among them, the needle protection unit includes a needle cap 32 rotatably arranged on the surface of the cylindrical housing 1, an airbag three 33 fixedly arranged on the bottom wall of the needle cap 32, an airbag four 35 fixedly arranged on the bottom wall of the needle cap 32, and a medical cotton pad 34 detachably arranged on the surface of the airbag three 33. A first air hole 36 is penetratively formed inside the needle cap 32. The other end of the first air charging pipe 23 penetrates through the cylindrical housing 1 and corresponds to the first air hole 36. The first air hole 36 is communicated with the inside of the airbag three 33. A second air hole 37 is penetratively formed inside the needle cap 32. The other end of the second air charging pipe 24 penetrates through the cylindrical housing 1 and corresponds to the second air hole 37. The second air hole 37 is communicated with the inside of the airbag four 35.

[0048] Working process: Air flows from the first air charging pipe 23 through the first air hole 36 into the airbag three 33, and flows from the second air charging pipe 24 through the second air hole 37 into the airbag four 35, causing the airbag three 33 and the airbag four 35 to expand alternately. The expansion of the airbag three 33 and the airbag four 35 drives the medical cotton pad 34 to move so that the medical cotton pad 34 covers the position where the needle is located, protecting the puncture site.

[0049] Among them, the fixed catheter unit includes a catheter bracket 31 rotatably arranged on the surface of the cylindrical housing 1, a first chute 310 fixedly arranged on one side of the catheter bracket 31, a first telescopic rod 311 fixedly arranged on the cylindrical housing 1, and a second slider 312 slidably arranged on the surface of the cylindrical housing 1. The telescopic end of the first telescopic rod 311 slides and rotates in the first chute 310. The inside of the first telescopic rod 311 is communicated with the inside of the second air outlet pipe 26 and the second air inlet pipe 28. The second slider 312 corresponds to the second air outlet pipe 26 and the second air inlet pipe 28.

[0050] Among them, the storage component 4 includes a storage cover 41 rotatably arranged on the surface of the cylindrical housing 1, a second chute 42 fixedly arranged on one side of the storage cover 41, a second telescopic rod 43 fixedly arranged on the cylindrical housing 1, and a third slider 44 slidably arranged on the surface of the cylindrical housing 1. The telescopic end of the second telescopic rod 43 slides and rotates in the second chute 42. The inside of the second telescopic rod 43 is communicated with the inside of the second air outlet pipe 26 and the second air inlet pipe 28. The third slider 44 corresponds to the second air outlet pipe 26 and the second air inlet pipe 28.

[0051] Among them, two first sliders 38 are slidably arranged on the needle cap 32 in opposite directions, and a spring 39 is fixedly arranged between the two first sliders 38.

[0052] During specific use: Put the cylindrical shell 1 on the arm where the midline catheter needs to be inserted. Place the needle cap 32 at the position where needle insertion is required. Move the first slider 38 so that the two first sliders 38 approach each other, enabling the needle cap 32 to rotate relative to the cylindrical shell 1. Rotate the needle cap 32 to expose the skin below it. Start the air pump 21. The gas blown out by the air pump 21 can flow into the wheel cover 29 through the intake short pipe 25, thereby driving the impeller 210 to rotate. The rotation of the impeller 210 drives the air exchange disc 211 to rotate. The air flow can pass through the holes opened on the air exchange disc 211. Cooperating with the partition plate 212, it can achieve the alternating flow of gas into the first inflatable tube 23 and the second inflatable tube 24 and enter the first airbag 213 and the second airbag 214 to realize the alternating inflation of the first airbag 213 and the second airbag 214. Cooperating with the anti-slip particles on its surface, the cylindrical shell 1 can be fixed on the arm, and the alternating inflation can prevent blood stasis caused by long-term extrusion of the same part of the arm and can also play a role in massaging the arm, reducing skin injuries such as blisters and ulcers that may be caused by long-term compression. After fixing the cylindrical shell 1, puncture the skin at the position corresponding to the needle cap 32. After the puncture is completed, connect the catheter to the catheter bracket 31, and then rotate the needle cap 32 to make the needle cap 32 re-connect to the cylindrical shell 1. Air flows from the first inflatable tube 23 through the first air hole 36 into the third airbag 33 and from the second inflatable tube 24 through the second air hole 37 into the fourth airbag 35, causing the third airbag 33 and the fourth airbag 35 to inflate alternately. The inflation of the third airbag 33 and the fourth airbag 35 drives the medical cotton pad 34 to move so that the medical cotton pad 34 covers the position where the needle is located. The medical cotton pad 34 covers the puncture position, providing additional protection against external contamination and collision;

[0053] When infusion is required, toggle the second slider 312 so that the second slider 312 blocks the second intake pipe 28 and does not block the second outlet pipe 26. Air flows through the second outlet pipe 26 into the first telescopic rod 311 via the air pump 21. The telescopic end of the first telescopic rod 311 extends, driving the first sliding groove 310 to rotate and then driving the catheter bracket 31 to rotate, so that the catheter bracket 31 pops out, facilitating medical staff to operate the catheter. When the catheter does not need to be operated, the second slider 312 can be toggled again so that the second slider 312 blocks the second outlet pipe 26 and does not block the second intake pipe 28, thereby generating negative pressure inside the first telescopic rod 311. The telescopic end of the first telescopic rod 311 retracts, driving the catheter bracket 31 to rotate and reset and fix;

[0054] When it is necessary to use the storage space below the storage cover 41, slide the third slider 44 to make the third slider 44 block the second air outlet pipe 26 and not block the second air inlet pipe 28, so as to generate negative pressure in the second telescopic rod 43. The telescopic end of the second telescopic rod 43 contracts to drive the second sliding groove 42 to rotate, and then drives the storage cover 41 to rotate. The spare medical cotton pads 34 or the medicines to be taken can be placed in the storage space. Slide the third slider 44 again to make the third slider 44 block the second air inlet pipe 28 and not block the second air outlet pipe 26. Air flows into the second telescopic rod 43 from the second air outlet pipe 26. The telescopic end of the second telescopic rod 43 extends to drive the second sliding groove 42 to rotate, and then drives the storage cover 41 to reset and fix.

[0055] In short, if those of ordinary skill in the art are inspired by it and, without departing from the purpose of the present invention, design similar structural forms and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. A mini midline catheter fixator, comprising a cylindrical housing (1), characterized in that: It further includes a massage fixing component (2) arranged on the cylindrical shell (1), a catheter fixing component (3) arranged on one side of the massage fixing component (2), and a storage component (4) arranged on one side of the catheter fixing component (3). The massage fixing component (2) is connected to the storage component (4) through a pipeline; The massage fixing component (2) includes an air inflation fixing unit arranged on the surface of the cylindrical shell (1) and an air outlet commutation unit arranged inside the air inflation fixing unit. The air inflation fixing unit and the air outlet commutation unit are in transmission connection. The air inflation fixing unit includes an air pump (21) fixedly arranged on the surface of the cylindrical shell (1), an air outlet pipe one (22) fixedly arranged at the air outlet end of the air pump (21), and an air inlet pipe one (27) fixedly arranged at the air inlet end of the air pump (21); The catheter fixing component (3) includes a needle protection unit rotatably arranged on the surface of the cylindrical shell (1) and a fixed catheter unit arranged on the surface of the cylindrical shell (1). The needle protection unit is connected to the air outlet pipe one (22) through a pipeline, and the fixed catheter unit is connected to the air outlet pipe one (22) through a pipeline; A first inflatable tube (23) is fixedly arranged on the surface of the air outlet pipe one (22) in a through manner. A first airbag (213) is fixedly arranged on the inner wall of the cylindrical shell (1). The first inflatable tube (23) communicates with the inside of the first airbag (213). A second inflatable tube (24) is fixedly arranged on the air outlet pipe one (22) in a through manner. A second airbag (214) is fixedly arranged on the inner wall of the cylindrical shell (1). The second inflatable tube (24) communicates with the inside of the second airbag (214). The first airbag (213) and the second airbag (214) are arranged alternately. A second air inlet pipe (28) is fixedly arranged on the surface of the first air inlet pipe (27) in a through manner. A second air outlet pipe (26) is fixedly arranged on the surface of the first air outlet pipe (22) in a through manner; The needle protection unit includes a needle cap (32) rotatably arranged on the surface of the cylindrical shell (1), a third airbag (33) fixedly arranged on the bottom wall of the needle cap (32), a fourth airbag (35) fixedly arranged on the bottom wall of the needle cap (32), and a medical cotton pad (34) detachably arranged on the surface of the third airbag (33). A first air hole (36) is formed through the needle cap (32). The other end of the first inflatable tube (23) penetrates through the cylindrical shell (1) and corresponds to the first air hole (36). The first air hole (36) communicates with the inside of the third airbag (33). A second air hole (37) is formed through the needle cap (32). The other end of the second inflatable tube (24) penetrates through the cylindrical shell (1) and corresponds to the second air hole (37). The second air hole (37) communicates with the inside of the fourth airbag (35).

2. The mini midline catheter fixator according to claim 1, wherein: The air outlet commutation unit includes a wheel cover (29) fixedly arranged on the inner wall of the air outlet pipe one (22), an impeller (210) rotatably arranged inside the wheel cover (29), a ventilation disc (211) coaxially and fixedly arranged on the side wall of the impeller (210), and a partition plate (212) fixedly arranged on the inner wall of the air outlet pipe one (22).

3. The mini midline catheter fixator according to claim 2, characterized in that: An intake short pipe (25) is fixedly provided in a penetrating manner on the outer wall of the wheel housing (29), an exhaust pipe three (215) is fixedly provided on the outer wall of the wheel housing (29), one end of the exhaust pipe three (215) communicates with the inside of the wheel housing (29), and the other end of the exhaust pipe three (215) penetrates through the exhaust pipe one (22).

4. The mini midline catheter fixator according to claim 3, characterized in that: The fixed duct unit includes a duct bracket (31) rotatably provided on the surface of the cylindrical housing (1), a first chute (310) fixedly provided on one side of the duct bracket (31), a first telescopic rod (311) fixedly provided on the cylindrical housing (1), and a second slider (312) slidably provided on the surface of the cylindrical housing (1). The telescopic end of the first telescopic rod (311) is slidably and rotatably provided in the first chute (310). The inside of the first telescopic rod (311) communicates with the inside of the exhaust pipe two (26) and the intake pipe two (28). The second slider (312) corresponds to the exhaust pipe two (26) and the intake pipe two (28).

5. The mini midline catheter fixator according to claim 4, characterized in that: The storage assembly (4) includes a storage cover (41) rotatably provided on the surface of the cylindrical housing (1), a second chute (42) fixedly provided on one side of the storage cover (41), a second telescopic rod (43) fixedly provided on the cylindrical housing (1), and a third slider (44) slidably provided on the surface of the cylindrical housing (1). The telescopic end of the second telescopic rod (43) is slidably and rotatably provided in the second chute (42). The inside of the second telescopic rod (43) communicates with the inside of the exhaust pipe two (26) and the intake pipe two (28). The third slider (44) corresponds to the exhaust pipe two (26) and the intake pipe two (28).

6. The mini midline catheter fixator according to claim 5, characterized in that: A first slider (38) is slidably provided in an opposing manner on the needle cap (32), and a spring (39) is fixedly provided between the two first sliders (38).

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