Arm stabilizing device after PICC (Peripherally Inserted Central Catheter)

Abstract

The invention provides an arm stabilizing device used after PICC catheterization, and belongs to the field of medical treatment. The problems that after PICC catheterization is conducted, connection with the arm is too tight in an existing fixing mode, so that the skin of the contact part is uncomfortable, or the connection is too loose, so that the fixing effect cannot be achieved, and the like are solved. The device comprises a first upper arm fixing part, one end, close to an elbow, of the first upper arm fixing part is connected with a first expansion sleeve making contact with an upper arm, and the other end of the first upper arm fixing part is connected with a second upper arm fixing part; the second expansion sleeve is connected with the second upper arm fixing part and used for making contact with the upper arm close to the shoulder. The forearm supporting part is connected with the side, away from the second upper arm fixing part, of the first upper arm fixing part and used for being connected with a forearm and supporting an elbow; wherein the first expansion sleeve and the second expansion sleeve are the same in structure and can be filled with media in the working state, and the media are used for supporting the first expansion sleeve and the second expansion sleeve to make contact with an arm. The arm fixing device is mainly used for fixing arms after PICC catheterization.

Description

Technical Field

[0001] The present invention belongs to the medical field, and particularly relates to an arm stabilizing device after PICC catheterization. Background Art

[0002] After a patient undergoes PICC (Peripherally Inserted Central Venous Catheters) catheterization, the movement of the arm needs to be reduced within 24 hours, including the bending of the elbow and large-scale movements of the entire arm. However, patients in a coma or sleep state have difficulty controlling the movement of the arm, thus requiring a device to fix the arm. Existing arm fixation devices force the elbow to remain immobile through a fixation method, and the connection part with the arm also remains immobile. Wearing for 24 hours can cause discomfort to the patient, such as sweating at the contact area, skin itching, or pressure injuries or even thrombosis due to poor blood flow.

[0003] In summary, an arm stabilizing device after PICC catheterization is proposed. Summary of the Invention

[0004] In view of this, the present invention aims to provide an arm stabilizing device after PICC catheterization to solve problems such as skin discomfort at the contact area caused by too tight connection between the existing fixation method and the arm after PICC catheterization, or the inability to achieve the fixation effect due to too loose connection.

[0005] To achieve the above object, the present invention adopts the following technical solutions to provide an arm stabilizing device after PICC catheterization, including: The first upper arm fixing part, one end close to the elbow is connected with an expansion sleeve I in contact with the upper arm, and the other end of the first upper arm fixing part is connected with the second upper arm fixing part; The expansion sleeve II, connected with the second upper arm fixing part, is used to contact the upper arm close to the shoulder; The forearm support part, connected to the side of the first upper arm fixing part far from the second upper arm fixing part, is used to connect the forearm and support the elbow; Wherein, the expansion sleeve I and the expansion sleeve II have the same structure, and a medium can be filled inside in the working state, and the medium is used to support the expansion sleeve I and the expansion sleeve II to contact the arm.

[0006] Furthermore, the first upper arm fixing part includes a cavity end and a first support frame connected to one side of the cavity end. The expansion sleeve I is fixedly connected to the first support frame. The other side of the cavity end is slidably connected to the sliding end of the second upper arm fixing part. A second support frame for fixing the expansion sleeve II is provided on the side of the sliding end far from the first support frame.

[0007] Further, the sliding end is connected with a support base, the middle of the support base is connected with a reciprocating component, and one side of the reciprocating component away from the second expansion sleeve is connected with the inner wall of the cavity end.

[0008] Further, the reciprocating component includes a control screw rod and a supporting base, the control screw rod is in threaded connection with the supporting base, and the supporting base is fixedly arranged on the support base.

[0009] Further, a limiting protrusion for limiting the rebound position is arranged on one side of the sliding end, a sliding groove for the limiting protrusion to slide is arranged in the cavity end, an opening for exposing the limiting protrusion is arranged on the sliding groove, and a rotating plate for limiting the position of the limiting protrusion is rotatably connected at the opening.

[0010] Further, the second expansion sleeve includes an airbag, a communicating pipe, a chamber and an arm chamber, a plurality of isolated chambers are arranged inside the airbag, each chamber is provided with an inlet and an outlet, the communicating pipe is used for connecting the inlets and outlets of two adjacent chambers, and the airbag is provided with a medium inlet and a medium outlet.

[0011] Further, a plurality of air vents are arranged on the cavity end close to the upper arm side, a plurality of supporting protrusions for supporting the arm are arranged on the sliding end close to the upper arm side, and each supporting protrusion slides between the air vents at corresponding positions.

[0012] Further, an exhaust port is arranged on the support base, an air inlet is arranged on the sliding end, and a fan is arranged at the exhaust port to suck air through the air inlet and blow it onto the upper arm after passing through the exhaust port and the air vents.

[0013] Further, a slide rail is arranged on the first upper arm fixing part, and the forearm supporting part is slidably connected with the slide rail.

[0014] Further, the forearm supporting part includes a sliding block, a linkage rod, a guiding block, a locking plate and a forearm supporting part body, the sliding block is slidably connected with the slide rail, one end of the linkage rod is rotatably connected with the sliding block, the guiding block is fixed on the linkage rod, the guiding block can slide on the slide rail, a friction plate is arranged in the middle of the slide rail, the locking plate is used for contacting the friction plate to lock the position of the linkage rod, and the forearm supporting part body is arranged at the other end of the linkage rod.

[0015] Beneficial effects: 1. By setting the first upper arm fixing part and the second upper arm fixing part, different lengths can be adjusted according to different patients. The first expansion sleeve and the second expansion sleeve are respectively arranged on the first upper arm fixing part and the second upper arm fixing part. On the one hand, the position of the arm can be limited, and on the other hand, the expansion degree can be controlled by controlling the inflow amount of the medium, and the arm can be fixed and massaged by controlling the expansion degree.

[0016] By setting a reciprocating component to control the reciprocating motion of the first upper arm fixing part and the second upper arm fixing part, the stiffness caused by the long-term immobility of the arm can be reduced. At the same time, it can also drive the first expansion sleeve and the second expansion sleeve to move slightly relative to the arm, increasing the comfort of the arm.

[0017] The setting of the forearm support part can conveniently fix the elbow, and can also adjust the angle between the forearm support part and the first upper arm fixing part, thereby adjusting the angle formed by the forearm and the upper arm, bringing a more comfortable feeling to the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 is a schematic diagram of the overall structure of an arm stabilizing device after PICC catheterization according to the present invention; Figure 2 is a schematic diagram of the structure of the first perspective view of the connection between the first upper arm fixing part and the second upper arm fixing part of an arm stabilizing device after PICC catheterization according to the present invention; Figure 3 as described in the present invention Figure 2 is a top view of the structure; Figure 4 as described in the present invention Figure 3 is a sectional view taken along the line BB of the structure; Figure 5 as described in the present invention Figure 4 is an enlarged schematic view of part A of the structure; Figure 6 is a schematic diagram of the structure of the second upper arm fixing part according to the present invention; Figure 7 is a schematic diagram of the structure of the first upper arm fixing part according to the present invention; Figure 8 is a schematic diagram of the structure of the support seat according to the present invention; Figure 9 is a schematic diagram of the structure of the second expansion sleeve according to the present invention; Figure 10 as described in the present invention Figure 9 is a sectional view taken along the line AA of the structure; Figure 11 is a schematic diagram of the structure of an arm stabilizing device after PICC catheterization in an open state before installation and fixation according to the present invention; Figure 12 is a schematic diagram of the structure of an arm stabilizing device after PICC catheterization in a fixed state according to the present invention; Figure 13 as described in the present invention Figure 2Schematic structural diagram of the second perspective; Figure 14 Schematic structural diagram of the forearm support part of the present invention.

[0019] In the figure: upper arm fixing part 1; cavity end 1-1; support frame 1 1-2; slide rail 1-3; friction plate 1-4; air vent 1-5; opening 1-6; rotating plate 1-7; chute 1-8; upper arm fixing part 2 2; sliding end 2-1; support frame 2 2-2; supporting protrusion 2-3; sliding end cavity 2-4; limiting protrusion 2-5; air inlet 2-6; expansion sleeve 2 3; airbag 3-1; connecting pipe 3-2; medium flow inlet 3-3; medium discharge port 3-4; chamber 3-5; arm chamber 3-6; expansion sleeve 1 4; forearm support part 5; sliding block 5-1; linkage rod 5-2; guiding block 5-3; locking plate 5-4; elbow support seat 5-5; elbow air vent 5-6; forearm support part 5-7; angle motor 5-8; support seat 6; cross plate 6-1; anti-collision column 6-2; exhaust port 6-3; through hole 6-4; reciprocating assembly 7; control screw 7-1; supporting seat 7-2; linear motor 7-3. Specific embodiments

[0020] The following will clearly and completely elaborate on the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0021] It should be noted that the descriptions of directions such as "left", "right", "left side", "right side", "upper part", "lower part", "top", "bottom", etc. in the present invention are all defined based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the described structure must be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present invention. In the description of the present invention, the meaning of "a plurality" is more than two, unless otherwise specifically defined.

[0022] In the description of the present invention, unless otherwise clearly defined 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. Specific embodiment 1: Referring to the accompanying drawings to illustrate this embodiment, a device for stabilizing the arm after PICC catheterization is provided, including: The first upper arm fixing part 1 is connected with an expansion sleeve 4 contacting the upper arm at one end close to the elbow, and the other end of the first upper arm fixing part 1 is connected with the second upper arm fixing part 2; a first support frame 1-2 is provided at one end of the first upper arm fixing part 1, and the expansion sleeve 4 is fixedly connected to the first support frame 1-2. The expansion sleeve 4 is sleeved on the upper arm. After gas or liquid is filled into the expansion sleeve 4, the expansion sleeve 4 expands and contacts the arm. By controlling the amount of the flowing medium, the expansion sleeve 4 can expand reciprocally, playing the role of arm massage and reducing the discomfort caused to the patient by the fixing method. There is also a cavity end 1-1 on the first upper arm fixing part 1, and the second upper arm fixing part 2 is slidably connected in the cavity end 1-1. The second upper arm fixing part 2 includes a sliding end 2-1, and the sliding end 2-1 slides in the cavity end 1-1, thereby adjusting the distance between the expansion sleeve 4 and the expansion sleeve 3, so as to adapt to different patients.

[0024] The expansion sleeve 3 is connected with the second upper arm fixing part 2 and is used to contact the upper arm close to the shoulder; a plurality of chambers 3-5 are provided in the expansion sleeve 3, and the medium flows into the chambers 3-5 to expand, playing the role of fixing the arm.

[0025] The forearm support part 5 is connected to the side of the first upper arm fixing part 1 far from the second upper arm fixing part 2 and is used to connect the forearm and support the elbow; a sliding groove 1-8 is provided on the first upper arm fixing part 1, and a sliding block 5-1 is provided on the forearm support part 5. The sliding block 5-1 always keeps sliding connection with the sliding groove 1-8. The guiding block 5-3 disengages from the sliding groove 1-8 during the opening stage of the device, so that the forearm support part 5 can rotate relative to the first upper arm fixing part 1. Furthermore, the forearm can first pass through the expansion sleeve 3 and the expansion sleeve 4, then the upper arm passes through the expansion sleeve 3 and the expansion sleeve 4 and stays at the upper arm. Then, the guiding block 5-3 is moved to the sliding groove 1-8. At this time, the forearm support part 5 can only reciprocally move along the sliding groove 1-8 and is adjusted to a suitable position. By rotating the locking plate 5-4 to contact the friction plate 1-4, the forearm support part 5 and the first upper arm fixing part 1 are kept fixed, and the installation is completed at this time.

[0026] Wherein, the expansion sleeve 4 and the expansion sleeve 3 have the same structure, and the medium can be filled inside during the working state. The medium is used to support the expansion sleeve 4 and the expansion sleeve 3 to contact the arm. During the use process, the expansion sleeve 4 and the expansion sleeve 3 can be expanded to fix the arm by supplying gas or liquid, and at the same time, the expansion sizes of the expansion sleeve 4 and the expansion sleeve 3 can be controlled by controlling the amount of the supplied medium, so as to play the role of arm massage and reduce the discomfort brought by the traditional fixing method.

[0027] In this embodiment, the first upper arm fixing part 1 includes a cavity end 1-1 and a first support frame 1-2 connected to one side of the cavity end 1-1. A first expansion sleeve 4 is fixedly connected to the first support frame 1-2. The other side of the cavity end 1-1 is slidably connected to the sliding end 2-1 of the second upper arm fixing part 2. On the side of the sliding end 2-1 away from the first support frame 1-2, there is a second support frame 2-2 for fixing the second expansion sleeve 3.

[0028] The first expansion sleeve 4 and the second expansion sleeve 3 pass through the arm in the middle. The sliding direction of the cavity end 1-1 and the sliding end 2-1 is the same as the direction of the arm. The first support frame 1-2 and the second support frame 2-2 are annular, and the first expansion sleeve 4 and the second expansion sleeve 3 are respectively connected inside.

[0029] In this embodiment, the sliding end 2-1 is connected to a support seat 6. The middle of the support seat 6 is connected to a reciprocating component 7. The side of the reciprocating component 7 away from the second expansion sleeve 3 is connected to the inner wall of the cavity end 1-1.

[0030] There is a sliding end cavity 2-4 inside the sliding end 2-1. A support seat 6 is fixed at the entrance of the sliding end cavity 2-4. The support seat 6 includes a cross plate 6-1 that closes the entrance of the sliding end cavity 2-4, and a through hole 6-4 opened in the middle of the cross plate 6-1. A bearing seat 7-2 is fixed in the middle of the through hole 6-4. The control screw 7-1 of the reciprocating component 7 is threadedly connected to the bearing seat 7-2. By controlling the positional relationship of the control screw 7-1 relative to the cross plate 6-1, the second upper arm fixing part 2 is driven to reciprocate slidably relative to the first upper arm fixing part 1 within a small range, thereby increasing the reciprocating movement in the direction of the arm, massaging the arm, and reducing the discomfort caused by the long-term fixed posture of the arm.

[0031] In this embodiment, the reciprocating component 7 includes a control screw 7-1 and a bearing seat 7-2. The control screw 7-1 is threadedly connected to the bearing seat 7-2. The bearing seat 7-2 is fixedly arranged on the support seat 6.

[0032] The control screw 7-1 is connected to a linear motor 7-3. The linear motor 7-3 is fixed inside the cavity end 1-1. The rotation of the linear motor 7-3 drives the control screw 7-1 to rotate. The rotation of the control screw 7-1 drives the bearing seat 7-2 to move. The movement of the bearing seat 7-2 drives the cross plate 6-1 to move. The cross plate 6-1 drives the second upper arm fixing part 2 to move. Thus, two functions are achieved. One is elongation and shortening, which can be adjusted to a suitable position according to the length of the patient's arm. The other is that the relative reciprocating movement of the second upper arm fixing part 2 relative to the first upper arm fixing part 1 can be controlled within a certain range by changing the rotation direction of the linear motor 7-3 to realize the massage function.

[0033] The anti-collision post 6-2 is arranged on the side of the linear motor 7-3 of the cross plate 6-1 to prevent the linear motor 7-3 from being squeezed when the minimum lengths of the first upper arm fixing part 1 and the second upper arm fixing part 2 are reached.

[0034] In this embodiment, a limiting protrusion 2-5 for restricting the rebound position is provided on one side of the sliding end 2-1. A sliding groove 1-8 for the sliding of the limiting protrusion 2-5 is provided in the cavity end 1-1. An opening 1-6 for exposing the limiting protrusion 2-5 is provided on the sliding groove 1-8. A rotating plate 1-7 for restricting the position of the limiting protrusion 2-5 is rotatably connected at the opening 1-6.

[0035] The rotating plate 1-7 and the limiting protrusion 2-5 can prevent excessive relative displacement between the first upper arm fixing part 1 and the second upper arm fixing part 2 when the tooth part is not engaged with the rack, causing discomfort to the patient. The sliding groove 1-8 can make the first upper arm fixing part 1 and the second upper arm fixing part 2 reach the minimum length during recovery. In the working state, the rotating plate 1-7 blocks the sliding groove 1-8 to prevent the limiting protrusion 2-5 from entering the sliding groove 1-8, that is, it limits the maximum position of the reciprocating movement of the first upper arm fixing part 1 and the second upper arm fixing part 2.

[0036] In this embodiment, the second expansion sleeve 3 includes an airbag 3-1, a connecting pipe 3-2, a chamber 3-5 and an arm chamber 3-6. A plurality of isolated chambers 3-5 are provided inside the airbag 3-1. Each chamber 3-5 is provided with an inlet and an outlet. The connecting pipe 3-2 is used to connect the inlets and outlets of two adjacent chambers 3-5. The airbag 3-1 is provided with a medium inlet 3-3 and a medium outlet 3-4.

[0037] Under the working condition that massage is needed, a medium is injected into each chamber 3-5 through the inlet and discharged at the outlet. If massage is not needed, the pressure of the injected medium is maintained to keep the expansion size unchanged.

[0038] During work, the inlets and outlets of each chamber 3-5 can be connected to the supply device. The supply device is an air supply pump or a liquid supply pump. It is also possible to use the connecting pipe 3-2 to connect several or all chambers 3-5 in series, leaving a medium inlet 3-3 and a medium outlet 3-4.

[0039] In this embodiment, a plurality of air vents 1-5 are provided on the cavity end 1-1 close to the upper arm side. A plurality of supporting protrusions 2-3 for supporting the arm are provided on the sliding end 2-1 close to the upper arm side. Each supporting protrusion 2-3 slides between the corresponding air vents 1-5.

[0040] The air vents 1-5 can make the part where the arm contacts the cavity end 1-1 breathable, preventing symptoms such as itchy skin caused by poor skin breathability due to long-term contact between the skin and the cavity end 1-1.

[0041] In this embodiment, the support base 6 is provided with an exhaust port 6-3, the sliding end 2-1 is provided with an air inlet 2-6, and a fan is provided at the exhaust port 6-3 to suck air through the air inlet 2-6 and blow it onto the upper arm after passing through the exhaust port 6-3 and the air permeable port 1-5.

[0042] By adding an active air supply structure, the gas is blown onto the skin sequentially through the air inlet 2-6, the exhaust port 6-3, and the air permeable port 1-5.

[0043] In this embodiment, the upper arm fixing part 1 is provided with a slide rail 1-3, and the forearm support part 5 is slidably connected to the slide rail 1-3.

[0044] In this embodiment, the forearm support part 5 includes a sliding block 5-1, a linkage rod 5-2, a guide block 5-3, a locking plate 5-4, and a forearm support part 5-7. The sliding block 5-1 is slidably connected to the slide rail 1-3. One end of the linkage rod 5-2 is rotatably connected to the sliding block 5-1. The guide block 5-3 is fixed on the linkage rod 5-2 and can slide on the slide rail 1-3. A friction plate 1-4 is provided in the middle of the slide rail 1-3. The locking plate 5-4 is used to contact the friction plate 1-4 to lock the position of the linkage rod 5-2. The forearm support part 5-7 is provided at the other end of the linkage rod 5-2.

[0045] The sliding block 5-1 always slides on the slide rail 1-3. When preparing, that is, in the open state, the guide block 5-3 is disengaged from the slide rail 1-3, so that the entire forearm support part 5 can rotate around the connection between the sliding block 5-1 and the linkage rod 5-2, so that the forearm passes through the second expansion sleeve 3 and the first expansion sleeve 4, and the upper arm is placed into the second expansion sleeve 3 and the first expansion sleeve 4. Then the guide block 5-3 is inserted into the slide rail 1-3. At this time, the forearm support part 5 can only move relative to the upper arm fixing part 1 along the direction of the slide rail 1-3. Then adjust the connection between the forearm support part 5-7 and the forearm. At this time, the elbow is placed on the elbow support seat 5-5 of the forearm support part 5, and an elbow air permeable port 5-6 for ventilation is also provided at the elbow. By rotating the locking plate 5-4, the locking plate 5-4 contacts the friction plate 1-4 to keep the position of the forearm support part 5 and the upper arm fixing part 1 fixed.

[0046] The forearm support part 5-7 is rotatably connected relative to the elbow support seat 5-5. An angle motor 5-8 is provided on the forearm support part 5-7. The angle motor 5-8 is fixed on the elbow support seat 5-5 and is used to adjust the relative angle between the angle motor 5-8 and the forearm support part 5-7, so as to bring a more comfortable feeling to the patient.

[0047] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. According to the content of this specification, many modifications and variations can be made. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention.

Claims

1. A PICC post-insertion arm stabilization device, characterized in that: include: An upper arm fixing part 1 (1), one end of which is close to the elbow, is connected to an expansion sleeve 1 (4) in contact with the upper arm, and the other end of the upper arm fixing part 1 (1) is connected to an upper arm fixing part 2 (2); The second expansion sleeve (3) is connected to the second upper arm fixing portion (2) and is used to contact the upper arm near the shoulder; A forearm supporting portion (5) connected to a side of the upper arm fixing portion 1 (1) away from the upper arm fixing portion 2 (2), and used for connecting the forearm and supporting the elbow; The expansion sleeve 1 (4) and the expansion sleeve 2 (3) have the same structure and can be filled with a medium in the working state, and the medium is used to prop up the expansion sleeve 1 (4) and the expansion sleeve 2 (3) to contact the arm.

2. The arm stabilizing device after PICC catheter placement according to claim 1, characterized in that: The upper arm fixing part 1 (1) comprises a cavity end (1-1) and a support frame 1 (1-2) connected to one side of the cavity end (1-1); an expansion sleeve 1 (4) is fixedly connected to the support frame 1 (1-2); the other side of the cavity end (1-1) is slidably connected to the sliding end (2-1) of the upper arm fixing part 2 (2); and a support frame 2 (2-2) for fixing the expansion sleeve 2 (3) is provided on a side of the sliding end (2-1) away from the support frame 1 (1-2).

3. The arm stabilizing device after PICC catheter placement according to claim 2, characterized in that: The sliding end (2-1) is connected to a support seat (6), a reciprocating assembly (7) is connected to the middle of the support seat (6), and a side of the reciprocating assembly (7) away from the second expansion sleeve (3) is connected to the inner wall of the cavity end (1-1).

4. The arm stabilizing device after PICC catheter placement according to claim 3, characterized in that: The reciprocating assembly (7) comprises a control screw (7-1) and a support seat (7-2); the control screw (7-1) is threadedly connected to the support seat (7-2); and the support seat (7-2) is fixedly arranged on the support seat (6).

5. The arm stabilizing device after PICC catheter placement according to claim 4, characterized in that: A limiting protrusion (2-5) for limiting the rebound position is provided on one side of the sliding end (2-1), a sliding groove (1-8) for the limiting protrusion (2-5) to slide is provided in the cavity end (1-1), an opening (1-6) for exposing the limiting protrusion (2-5) is provided on the sliding groove (1-8), and a rotating plate (1-7) for limiting the position of the limiting protrusion (2-5) is rotatably connected to the opening (1-6).

6. The arm stabilizing device after PICC catheter placement according to claim 1, characterized in that: The second expansion sleeve (3) comprises an airbag (3-1), a connecting pipe (3-2), a chamber (3-5) and an arm chamber (3-6); a plurality of isolated chambers (3-5) are arranged inside the airbag (3-1); each chamber (3-5) is provided with an inlet and an outlet; the connecting pipe (3-2) is used to connect the inlets and outlets of two adjacent chambers (3-5); and the airbag (3-1) has a medium inlet (3-3) and a medium outlet (3-4).

7. The arm stabilizing device after PICC catheter placement according to claim 3, characterized in that: The cavity end (1-1) is provided with a plurality of ventilation openings (1-5) near the upper arm side, and the sliding end (2-1) is provided with a plurality of supporting protrusions (2-3) for supporting the arm near the upper arm side, and each supporting protrusion (2-3) slides between the ventilation openings (1-5) at corresponding positions.

8. The arm stabilizing device after PICC catheter placement according to claim 7, characterized in that: The support seat (6) is provided with an exhaust port (6-3), the sliding end (2-1) is provided with an air inlet (2-6), and a fan is provided at the exhaust port (6-3) to suck air through the air inlet (2-6) and blow air toward the upper arm after passing through the exhaust port (6-3) and the air vent (1-5).

9. The arm stabilizing device after PICC catheter placement according to claim 1, characterized in that: The upper arm fixing portion 1 (1) is provided with a slide rail (1-3), and the forearm supporting portion (5) is slidably connected to the slide rail (1-3).

10. The arm stabilizing device after PICC catheter placement according to claim 9, characterized in that: The forearm support part (5) comprises a sliding block (5-1), a linkage rod (5-2), a guide block (5-3), a locking plate (5-4) and a forearm support part (5-7); the sliding block (5-1) is slidably connected to the slide rail (1-3); one end of the linkage rod (5-2) is rotatably connected to the sliding block (5-1); the guide block (5-3) is fixed on the linkage rod (5-2); the guide block (5-3) can slide on the slide rail (1-3); a friction plate (1-4) is provided in the middle of the slide rail (1-3); the locking plate (5-4) is used to contact the friction plate (1-4) to lock the position of the linkage rod (5-2); and the forearm support part (5-7) is arranged at the other end of the linkage rod (5-2).

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