Arm fixing device for plasma dynamic detection

Abstract

The utility model relates to the field of medical instrument auxiliary equipment, in particular to an arm fixing device for plasma dynamics detection, which comprises a base, two identical fixing seats connected to the front end and the rear end of the base, a pressing frame slidably connected in the fixing seats, a telescopic belt connected in the pressing frame, and step plates connected to the left side and the right side of the pressing frame. Shells are connected to the left side and the right side of the fixing base and cover the stepped plate, a limiting frame is slidably connected to the shells and matched with the stepped plate in a limiting mode, a first reset spring is arranged on the limiting frame in a sleeving mode, one end of the first reset spring is connected with the limiting frame, the other end of the first reset spring is connected with the shells, and an unlocking assembly used for rapidly unlocking the limiting frame is arranged in the fixing base. Through the cooperation of the telescopic belt and the fixed seat and the close contact of the step plate and the limiting frame, the stable fixation of the arm and the palm is realized, and the stability of the arm in the plasma dynamics detection process is ensured.

Description

Technical Field

[0001] This utility model relates to the field of medical device auxiliary equipment, and in particular to an arm fixation device for plasma dynamics testing. Background Technology

[0002] Plasma is a crucial component of blood, primarily composed of water, proteins, electrolytes, and other small molecules. It plays various physiological roles in the human body, including transporting nutrients, eliminating metabolic waste, and maintaining acid-base balance. Plasmodynamics is an important medical diagnostic tool that assesses the health of the cardiovascular system by analyzing blood flow characteristics in blood vessels, such as blood flow rate, blood flow resistance, and blood pressure. This testing is significant for diagnosing cardiovascular diseases, monitoring treatment effectiveness, and evaluating patient prognosis.

[0003] In current plasma dynamics testing procedures, to obtain accurate results, it is necessary to ensure that the subject's arm remains stable and to prevent wrist movement or swaying. Currently, several arm immobilization devices are available on the market to assist in plasma dynamics testing. These devices typically include a restraint that uses straps to fix the arm in a specific position, maintaining a stable wrist posture. In practice, the testing personnel use this restraint to secure the patient's arm, ensuring that it does not move during the test and thus obtaining accurate hemodynamic parameters.

[0004] Many existing arm fixation devices use Velcro to secure the hand and forearm. While this method simplifies the process to some extent, the effective number of uses of Velcro is limited. With repeated use, the adhesive strength of the Velcro gradually decreases, leading to a decline in the fixation effectiveness of the device. Utility Model Content

[0005] To overcome the drawback of decreased fixation effectiveness with use, this invention provides an arm fixation device with good fixation effect for plasma dynamics testing.

[0006] An arm fixation device for plasma dynamics monitoring includes a base with two identical fixing seats connected to its front and rear ends. A pressing frame is slidably connected within each fixing seat, and a telescopic belt is connected within the pressing frame. Stepped plates are connected to the left and right sides of the pressing frame, and outer shells are connected to the left and right sides of the fixing seats. The outer shells cover the stepped plates, and a limiting frame is slidably connected to the outer shell. The limiting frame engages with the stepped plates, and a first return spring is sleeved on the limiting frame. One end of the first return spring is connected to the limiting frame, and the other end is connected to the outer shell. An unlocking component for quickly unlocking the limiting frame is provided within the fixing seat.

[0007] Furthermore, the unlocking assembly includes an operating lever, a rack, and a connecting rod. The operating lever is rotatably connected to the fixed base, and a gear is rotatably connected inside the fixed base. The operating lever is fixedly connected to the gear shaft, and a torsion spring is sleeved on the operating lever. One end of the torsion spring is connected to the gear, and the other end is connected to the fixed base. The rack is slidably connected inside the fixed base, and the two racks mesh with the top and bottom of the gear, respectively. One end of the connecting rod passes through the fixed base and is fixedly connected to the rack, and the other end is fixedly connected to the limiting frame.

[0008] Furthermore, a second return spring is provided inside the fixed base, the top of the second return spring is connected to the bottom of the pressing frame, and the bottom of the second return spring is connected to the fixed base.

[0009] Furthermore, a foam pad is provided on the fixing base.

[0010] Furthermore, the bottom of the pressing frame is provided with an anti-slip pad.

[0011] Furthermore, the pressing frame has a marking groove on its side, which corresponds to each step groove of the stepped plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. By combining the telescopic belt with the fixed seat and the step plate with the limit frame, the arm and hand are stably fixed, ensuring the stability of the arm during the plasma dynamics test.

[0014] 2. The unlocking assembly, consisting of an operating lever, gears, racks, connecting rods, and torsion springs, can quickly release the fixation on the arm and hand after the detection is completed, improving the convenience of operation and realizing a fast and simple unlocking function. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a three-dimensional structural diagram of the pressing frame and stepped plate of this utility model.

[0017] Figure 3 This is a three-dimensional structural diagram of the connecting rod and operating rod of this utility model.

[0018] Figure 4 This is a three-dimensional structural diagram of the torsion spring and rack of this utility model.

[0019] Component names and numbers in the diagram: 1_Base, 2_Fixed seat, 3_Pressing bracket, 4_Telescopic belt, 5_Step plate, 6_Outer shell, 7_Limiting bracket, 8_First return spring, 9_Unlocking assembly, 91_Operating lever, 92_Gear, 93_Rack, 94_Connecting rod, 95_Torsion spring, 10_Second return spring, 11_Foam pad, 12_Anti-slip pad, 13_Identification groove. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings.

[0021] Example: An arm fixation device for plasma dynamics monitoring, such as... Figures 1-4 As shown, the device includes a base 1, a fixed seat 2, a pressing frame 3, a telescopic belt 4, a step plate 5, a housing 6, a limiting frame 7, a first return spring 8, and an unlocking component 9. The base 1 has two identical fixed seats 2 connected to its front and rear ends. A pressing frame 3 is slidably connected inside the fixed seat 2. A telescopic belt 4 is connected inside the pressing frame 3. Step plates 5 are connected to the left and right sides of the pressing frame 3. The fixed seat 2 has a housing 6 connected to its left and right sides, covering the step plates 5. A limiting frame 7 is slidably connected to the housing 6, limiting the step plates 5. A first return spring 8 is fitted onto the limiting frame 7, with one end connected to the limiting frame 7 and the other end connected to the housing 6. An unlocking component 9 for quickly unlocking the limiting frame 7 is provided inside the fixed seat 2.

[0022] like Figure 2 and Figure 4 As shown, the unlocking component 9 includes an operating lever 91, a gear 92, a rack 93, a connecting rod 94, and a torsion spring 95. The operating lever 91 is rotatably connected to the fixed base 2. The gear 92 is rotatably connected inside the fixed base 2. The operating shaft is fixedly connected to the rotating shaft of the gear 92. The torsion spring 95 is sleeved on the operating shaft. One end of the torsion spring 95 is connected to the gear 92, and the other end is connected to the fixed base 2. The rack 93 is slidably connected inside the fixed base 2. The two racks 93 mesh with the top and bottom of the gear 92, respectively. One end of the connecting rod 94 passes through the fixed base 2 and is fixedly connected to the rack 93. The other end is fixedly connected to the limit frame 7.

[0023] like Figure 2 and Figure 4 As shown, it also includes a second reset spring 10. The second reset spring 10 is provided in the fixed base 2. The top of the second reset spring 10 is connected to the bottom of the pressing frame 3, and the bottom of the second reset spring 10 is connected to the fixed base 2.

[0024] like Figure 1 and Figure 3 As shown, it also includes a foam pad 11, which is provided on the fixing base 2.

[0025] like Figure 1 and Figure 3As shown, it also includes an anti-slip pad 12, and the bottom of the pressing frame 3 is provided with an anti-slip pad 12.

[0026] like Figure 3 As shown, the side of the pressing frame 3 has a marking groove 13, which corresponds to each step groove of the step plate 5.

[0027] When preparing for a plasma viability test, the person to be tested first passes their arm through the device, through the first pressing frame 3, and then places their palm on the second pressing frame 3. Subsequently, the pressing frame 3 is pressed down, which causes the telescopic belt 4 to move downward as well. The combined action of the telescopic belt 4 and the fixing seat 2 effectively restricts the movement of the arm and palm, ensuring stability during the test. The foam pad 11 provides cushioning when the arm and palm are fixed, reducing discomfort, while the anti-slip pad 12 at the bottom of the pressing frame 3 increases friction during the pressing process, preventing slippage.

[0028] As the pressing frame 3 descends, it compresses the second return spring 10. At the same time, the step plates 5 on both sides of it also move downward. The step plates 5 are composed of multiple horizontally placed triangular prisms with their inclined surfaces facing down and their top surfaces being flat. Meanwhile, the limiting frame 7, which is slidably connected inside the outer shell 6, is also designed as a triangular prism at one end that contacts the step plate 5, with its top surface being inclined and its bottom surface being flat. Therefore, when the step plate 5 descends, the inclined surfaces of the triangular prisms and the inclined surfaces of the limiting frame 7 press against each other. During this process, the first return spring 8 is compressed, ensuring close contact between the limiting frame 7 and the step plate 5. When the flat surfaces of the step plate 5 and the flat surfaces of the limiting frame 7 come into contact, they support each other and prevent the pressing frame 3 from moving upward, thus securing the arm and palm firmly.

[0029] After the plasma viability test is completed, in order to release the fixation on the arm and palm, the medical staff needs to rotate the operating lever 91. The rotation of the operating lever 91 drives the rotation of the gear 92 fixedly connected to it. At this time, the torsion spring 95 begins to twist and store energy. The rotation of the gear 92 further drives the two racks 93 meshing with it to slide in the fixed seat 2. The racks 93 are connected to the limiting frame 7 through the connecting rod 94. Therefore, the movement of the racks 93 drives the limiting frame 7 to move to both ends, thereby disengaging the limiting frame 7 from the step plate 5. During this process, the first reset spring 8 continues to be compressed, preparing for subsequent reset.

[0030] After the limiting bracket 7 disengages from the step plate 5, the second return spring 10 will rebound after the pressing bracket 3 is released from its restraints, helping the pressing bracket 3 to pop out. The person being tested does not need to manually pull the pressing bracket 3, thus releasing the fixation on their arm and palm. Before the test, medical staff can also observe the marking groove 13 on the side of the pressing bracket 3 to preliminarily judge and adjust the distance the pressing bracket 3 needs to move based on the body shape of the person being tested. The data on the marking groove 13 provides a reference for medical staff, making it easier for them to adjust it to a suitable position. After adjustment, they can ask the person being tested whether they feel comfortable or uncomfortable, thus ensuring the smooth progress of the testing process.

[0031] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An arm fixation device for plasma dynamics monitoring, characterized in that, The device includes a base (1), with two identical fixed seats (2) connected to the front and rear ends of the base (1). A pressing frame (3) is slidably connected inside the fixed seat (2). A telescopic belt (4) is connected inside the pressing frame (3). Step plates (5) are connected to the left and right sides of the pressing frame (3). A shell (6) is connected to the left and right sides of the fixed seat (2). The shell (6) covers the step plate (5). A limiting frame (7) is slidably connected to the shell (6). The limiting frame (7) is in a limiting fit with the step plate (5). A first return spring (8) is sleeved on the limiting frame (7). One end of the first return spring (8) is connected to the limiting frame (7), and the other end is connected to the shell (6). An unlocking component (9) for quickly unlocking the limiting frame (7) is provided inside the fixed seat (2).

2. The arm fixation device for plasma dynamics detection according to claim 1, characterized in that, The unlocking component (9) includes an operating lever (91), a rack (93), and a connecting rod (94). The operating lever (91) is rotatably connected to the fixed base (2). A gear (92) is rotatably connected inside the fixed base (2). The operating lever (91) is fixedly connected to the shaft of the gear (92). A torsion spring (95) is sleeved on the operating lever (91). One end of the torsion spring (95) is connected to the gear (92), and the other end is connected to the fixed base (2). The rack (93) is slidably connected inside the fixed base (2). The two racks (93) mesh with the top and bottom of the gear (92) respectively. One end of the connecting rod (94) passes through the fixed base (2) and is fixedly connected to the rack (93). The other end is fixedly connected to the limiting frame (7).

3. The arm fixation device for plasma dynamics detection according to claim 2, characterized in that, The fixed base (2) is provided with a second reset spring (10), the top of the second reset spring (10) is connected to the bottom of the pressing frame (3), and the bottom of the second reset spring (10) is connected to the fixed base (2).

4. The arm fixation device for plasma dynamics detection according to claim 3, characterized in that, A foam pad (11) is provided on the fixing seat (2).

5. The arm fixation device for plasma dynamics detection according to claim 4, characterized in that, The bottom of the pressing frame (3) is provided with an anti-slip pad (12).

6. The arm fixation device for plasma dynamics detection according to claim 5, characterized in that, The pressing frame (3) has a marking groove (13) on its side, which corresponds to each step groove of the step plate (5).

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