Tightness-adjustable tourniquet

Abstract

The present application relates to the technical field of medical devices, and discloses a tourniquet with adjustable tightness, which comprises a pulse monitoring sheet and a support, a tourniquet assembly is fixedly installed at the bottom of the support, the tourniquet assembly comprises a missing snap ring fixedly connected to the bottom end of the support on both sides, an extension strip is slidingly inserted into the missing snap ring, an exhaust hole is formed at the bottom end of the extension strip, a gas groove is formed in the inner side of the missing snap ring, and a bag strip connected to the bottom end of the extension strip is fixedly sleeved on the gas groove. According to the application, the opening at the bottom of the tourniquet is designed, so that the patient's limbs can be directly clamped, the tourniquet is not sleeved on the limbs from the end, the difficulty of tourniquet is increased, the opening is closed by the extension strip, the bag strip is automatically stretched to form overall wrapping on the limbs, the pulse monitoring sheet is used to monitor the pulse in real time, the stopping time of continuous inflation of the bag strip is controlled, the best tightness of the tourniquet is automatically adjusted, and the discomfort of the patient is avoided.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an adjustable pressure band. Background Technology

[0002] Before venipuncture in medical practice, medical staff usually tie a flexible rubber tube above the puncture site to slow down the backflow of venous blood, so that the local blood vessels are filled and the vein becomes visible. The tube is called a tourniquet or tourniquet. Using a tourniquet makes it easier to puncture successfully and also makes it easier to draw enough venous blood.

[0003] Current tourniquets are generally made from ordinary elastic silicone tubing. To ensure smooth visualization of the vein during a single application, the silicone tubing is tied with considerable force. This results in a relatively small pressure area at the tying point due to the small diameter of the tubing, leading to relatively high pressure on the surrounding tissue and causing varying degrees of pain for the patient. Some tourniquets, designed for rapid application and to reduce contact pressure, use a relatively complete annular inflatable cuff for tying. However, when there is significant bleeding in the extremities such as the hands or feet requiring immediate hemostasis, these areas are difficult to stably pass through the tourniquet, making them unusable. Even if the tourniquet is successfully applied, the difficulty in controlling the inflation of the cuff can easily lead to overly tight tying, increasing discomfort. Summary of the Invention

[0004] The purpose of this invention is to address the problem that conventional pressure bands are difficult to automatically adjust to achieve the optimal tightening force, which can easily lead to discomfort due to contact pressure. This invention provides a pressure band with adjustable tightness.

[0005] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0006] An adjustable pressure band includes a pulse monitoring pad and a support. A pressure band assembly is fixedly installed at the bottom of the support. The pressure band assembly includes a retaining ring fixedly connected to both sides of the bottom end of the support. An extension strip is slidably inserted into the retaining ring. An air vent is opened at the bottom end of the extension strip. An air groove is opened on the inner side of the retaining ring. A bladder strip connected to the bottom end of the extension strip is fixedly sleeved on the air groove. Multiple air columns are slidably inserted into the left and right sides of the front and rear walls of the retaining ring. A control component is movably connected inside the support. The control component includes a first retaining block and a second retaining block slidably installed on the inner wall of the support. A limit spring is fixedly connected between the first retaining block and the second retaining block. Wedge grooves are opened on the left and right sides of the second retaining block. A slider is slidably engaged in the wedge grooves.

[0007] Furthermore, each end of the pulse monitoring patch is connected to a corresponding Velcro strap, and a tether is fixedly connected between the pulse monitoring patch and the bracket.

[0008] Furthermore, the pressure pulse assembly also includes a pressure plate fixedly connected to the outside of the air column, and a sliding frame is fixedly connected between the pressure plates.

[0009] Furthermore, both the missing retaining ring and the pressure plate are arc-shaped, and the missing retaining rings are combined to form a pressure band with a bottom opening.

[0010] Furthermore, the vent extends into the interior of the bladder strip, and a rubber ring for sealing the vent is fixedly installed at the lower end of the extension strip.

[0011] Furthermore, the end of the pressure plate connected to the sliding frame includes an elastic portion with a small degree of deflection, and the end of the retaining ring connected to the bracket also includes an elastic portion with a small degree of deflection. The connecting end of the pressure plate is located at the midpoint of the line connecting the connecting ends of the retaining rings on the front and rear sides.

[0012] Furthermore, both the front and rear walls of the air groove cavity include air cavities adapted to the air column.

[0013] Furthermore, the sliding frame has a sliding groove that engages with the slider, and the sliding frame is slidably inserted into the side wall of the bracket.

[0014] Furthermore, the first card block is located at the bottom of the second card block, and a threaded column that is threadedly connected to the first card block is driven and installed at the center of the bracket. The threaded column is electrically driven by the pulse monitoring chip. The second card block is movably sleeved on the threaded column, and the first card block is movably engaged with the lower wall of the slider.

[0015] Furthermore, a hinge rod is movably connected between the second locking block and the extension strip, and a notch corresponding to the movement of the hinge rod is opened on the outer wall of the missing locking ring.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. This invention, through the design of an opening at the bottom of the tourniquet, facilitates direct application to the patient's limb, avoiding the need to slip it onto the limb end, which increases the difficulty of hemostasis. Subsequently, the opening is closed using an extension strip, and the tourniquet automatically expands to fully wrap the limb. A pulse monitoring pad monitors the pulse in real time, controlling the timing of stopping the tourniquet's continuous inflation. This automatic adjustment ensures the optimal pressure for securing the tourniquet to the pulse. Furthermore, as the tourniquet expands, it automatically increases the contact area with the skin, reducing contact pressure and avoiding discomfort to the patient.

[0018] 2. In this invention, after the first and second card blocks are fixed in place by using a limiting spring, the second card block is controlled to move continuously downward, driving the hinge rod to push the extension strip. After sealing the missing card ring to form a complete pressure pulse band coverage area, the first card block is automatically fixed, and the slider moves inward along the first card block, thereby causing the bladder strip to be pressurized and expanded, ensuring the reliability of the pressure pulse.

[0019] 3. In this invention, after the extension strips extend into place, they abut against each other, and the vent holes automatically connect and seal. This ensures that the inside of the bladder strip is sealed after the extension strips move into place. At the same time, the bladder strip automatically expands as it moves with the extension strips. Therefore, when the bladder strip is subsequently inflated, it can ensure that the bladder strip is fully expanded, forming a complete wrap around the limb, thus ensuring the effectiveness and comfort of the pulse pressure. Attached Figure Description

[0020] Figure 1 This is a first-view three-dimensional structural diagram of the blood pressure-stopping band of the present invention;

[0021] Figure 2 This is a two-dimensional structural diagram of the blood pressure-stopping pulse band of the present invention from a second perspective;

[0022] Figure 3 This is a three-dimensional cross-sectional view of the blood pressure-relieving pulse band of the present invention;

[0023] Figure 4 This is a partial three-dimensional cross-sectional view of the blood pressure-stopping pulse band component of the present invention;

[0024] Figure 5 This is a partial three-dimensional structural diagram of the blood pressure-stopping pulse band component of the present invention;

[0025] Figure 6 This is a partial three-dimensional structure of the blood pressure control component of the present invention;

[0026] Figure 7 This is a partial three-dimensional cross-sectional view of the blood pressure control component of the present invention.

[0027] Reference numerals: 1. Pulse monitoring plate; 2. Velcro; 3. Tie; 4. Bracket; 5. Pulse compression assembly; 51. Loop; 52. Extension strip; 53. Vent; 54. Air groove; 55. Bag strip; 56. Air column; 57. Pressure plate; 58. Sliding frame; 6. Control assembly; 61. Threaded rod; 62. First locking block; 63. Second locking block; 64. Limiting spring; 65. Wedge groove; 66. Slider; 67. Hinge rod. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0029] A preferred embodiment of the present invention, an adjustable pressure band, will be described in detail below, such as... Figure 1-4 As shown, an adjustable pressure band includes a pulse monitoring pad 1 and a bracket 4. A pressure band assembly 5 is fixedly installed at the bottom of the bracket 4. The pressure band assembly 5 includes a retaining ring 51 fixedly connected to both sides of the bottom end of the bracket 4. An extension strip 52 is slidably inserted into the retaining ring 51. An exhaust hole 53 is opened at the bottom end of the extension strip 52. An air groove 54 is opened on the inner side of the retaining ring 51. A bladder strip 55 connected to the bottom end of the extension strip 52 is fixedly sleeved on the air groove 54. Multiple air columns 56 are slidably inserted into the left and right sides of the front and rear walls of the retaining ring 51, respectively. A control assembly 6 is movably connected inside the bracket 4. The control assembly 6 includes a first retaining block 62 and a second retaining block 63 slidably installed on the inner wall of the bracket 4. A limit spring 64 is fixedly connected between the first retaining block 62 and the second retaining block 63. A wedge groove 65 is opened on the left and right sides of the second retaining block 63, and a slider 66 is slidably engaged in the wedge groove 65.

[0030] More specifically, the tourniquet's bottom opening design allows for direct application to the patient's limb, avoiding the need to slip it onto the limb's end, which increases the difficulty of hemostasis. Subsequently, the opening is sealed using the extension strip 52, and the tourniquet 55 automatically expands to fully wrap the limb. The pulse monitoring plate 1 monitors the pulse in real time, and the cessation of the pulse indicates the cessation of blood flow through the vein. This allows for control over when the tourniquet 55 stops inflating, automatically adjusting to ensure optimal pressure on the pulse. Furthermore, the tourniquet 55 automatically increases its contact area with the skin as it expands, reducing contact pressure and preventing patient discomfort.

[0031] Specifically, such as Figure 1-2 As shown, the pulse monitoring patch 1 has corresponding Velcro 2 connected to both ends, and the pulse monitoring patch 1 is fixedly connected to the bracket 4 with a tether 3. When stopping bleeding, the pulse monitoring patch 1 is attached to the pulse at the end of the limb that is being tied for hemostasis, and fixed with Velcro 2. Subsequently, the expansion degree of the balloon strip 55 can be adjusted and controlled according to the pulse fluctuation feedback to achieve the best tightness of pulse pressure.

[0032] Specifically, such as Figure 1-2 As shown, the pressure pulse assembly 5 also includes a pressure plate 57 fixedly connected to the outside of the air column 56. A sliding frame 58 is fixedly connected between the pressure plates 57. By using the control component 6 to guide the sliding frame 58, the pressure plate 57 drives the air column 56 to move, thereby realizing the expansion control of the bladder strip 55.

[0033] Specifically, such as Figure 3 As shown, the missing ring 51 and the pressure plate 57 are both arc-shaped. The missing rings 51 are combined to form a tourniquet with an opening at the bottom. The design of the tourniquet with an opening at the bottom makes it easy to directly clamp onto the patient's limb, avoiding the need to slip it on from the end of the limb, which would increase the difficulty of hemostasis.

[0034] Specifically, such as Figure 4-5 As shown, the vent 53 extends into the inside of the bladder strip 55, and a rubber ring for sealing the vent 53 is fixedly installed at the lower end of the extension strip 52. After the extension strip 52 extends into place, it abuts against each other, and the vent 53 automatically seals. This means that after the extension strip 52 moves into place, the inside of the bladder strip 55 is sealed. At the same time, the bladder strip 55 automatically expands into a ring shape as the extension strip 52 moves. Therefore, when the bladder strip 55 is subsequently inflated, it can ensure that the bladder strip 55 is fully expanded, forming a complete wrap around the limb, ensuring the effectiveness and comfort of the pulse pressure.

[0035] Specifically, such as Figure 1-3 As shown, the end of the pressure plate 57 connected to the sliding frame 58 includes an elastic part with a small degree of deflection, and the end of the notched ring 51 connected to the bracket 4 also includes an elastic part with a small degree of deflection. The connecting end of the pressure plate 57 is exactly at the midpoint of the line connecting the connecting ends of the notched rings 51 on the front and rear sides. When the opening at the bottom of the pressure band is insufficient to secure the patient's limb, the elastic deformation property of the pressure plate 57 and the notched ring 51 is used to control the notched ring 51 and the pressure plate 57 to bend slightly upward, so that the pressure band can be successfully worn.

[0036] Specifically, such as Figure 2-5 As shown, the front and rear walls of the inner cavity of the air groove 54 both include air chambers adapted to the air columns 56. By using the arrangement of multiple air columns 56, the air columns 56 are controlled to move synchronously in the air chambers, thereby realizing the supply or release of air to the air groove 54, which facilitates the expansion or contraction of the bladder strip 55.

[0037] Specifically, such as Figure 2 and Figure 7 As shown, the slide frame 58 has a slide groove that is movably engaged with the slider 66, and the slide frame 58 is slidably inserted into the side wall of the bracket 4.

[0038] Specifically, such as Figure 1-3 As shown, the first locking block 62 is located at the bottom of the second locking block 63, and the support 4 has a threaded column 61 that is threadedly connected to the first locking block 62. The threaded column 61 is electrically driven by the pulse monitoring chip 1. The second locking block 63 is movably sleeved on the threaded column 61. The first locking block 62 is movably locked with the lower wall of the slider 66. When the first locking block 62 and the second locking block 63 move relative to each other, the slider 66 is restricted by the movable locking with the first locking block 62 and the connection with the wedge groove 65, that is, it automatically pulls the sliding frame 58 closer to or away from the support 4 to adjust the pulse pressure assembly 5.

[0039] Specifically, such as Figure 1-3 As shown, a hinge rod 67 is movably connected between the second locking block 63 and the extension strip 52, and a notch corresponding to the movement of the hinge rod 67 is opened on the outer wall of the locking ring 51.

[0040] Working principle: During use, the tourniquet is secured to the patient's limb through the opening at the bottom. If the opening size is insufficient, the control thread 61 reverses, causing the first locking block 62 to move upward a short distance, lifting the second locking block 63. Utilizing the elastic deformation property of the connection end between the pressure plate 57 and the missing locking ring 51, the second locking block 63 drives the hinge rod 67, pulling the extension strip 52 upward. The pressure plate 57 then slightly bends upward along with the missing locking ring 51, achieving hemostasis. The opening at the bottom automatically enlarges. After the tourniquet is applied to the patient's limb, the pulse monitoring patch 1 is attached to the pulse point at the end of the tourniquet and secured with Velcro 2. The screw thread 61 is then rotated forward, engaging and causing the first locking block 62 to move downward. Simultaneously, utilizing the reaction force of the elastic deformation between the connecting end of the pressure plate 57 and the connecting end of the locking ring 51, the second locking block 63 returns to its initial position along with the first locking block 62. Subsequently, the limiting spring 64 is used to lock the second locking block. The pulling force of block 63 causes the second locking block 63 to continuously follow the first locking block 62 downwards, and drives the hinge rod 67 to push the extension strip 52 outwards, sealing the missing locking ring 51 to form a complete pressure band coverage area. At the same time, the bladder strip 55 moves with the extension strip 52 and automatically expands. After the extension strip 52 extends into place, it abuts against each other, and the exhaust hole 53 automatically connects and seals. Meanwhile, the second locking block 63 cannot follow the first locking block 62 to move further downwards, and the limit spring 64 is automatically stretched. As the first locking block 62 moves further downwards, the slider 66 is restricted by the movable engagement with the first locking block 62 and the sliding engagement with the wedge groove 65, that is, it automatically pulls the sliding frame 58 closer to the bracket 4. The pressure plates 57 on both sides of the pressure band then drive the air column 56 to apply pressure to the air groove 54, and the bladder strip 55, which completely surrounds the patient's limb, automatically expands and binds. During this period, the pulse monitoring plate 1 adjusts and controls the expansion degree of the bladder strip 55 according to the pulse fluctuation feedback to achieve the best tightness of the pressure band.

[0041] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pulse pressure band with adjustable tightness, comprising a pulse monitoring pad (1) and a support (4), characterized in that, A pressure pulse assembly (5) is fixedly installed at the bottom of the bracket (4). The pressure pulse assembly (5) includes a retaining ring (51) fixedly connected to both sides of the bottom end of the bracket (4). An extension strip (52) is slidably inserted into the retaining ring (51). An exhaust hole (53) is opened at the bottom end of the extension strip (52). An air groove (54) is opened on the inner side of the retaining ring (51). A bladder strip (55) connected to the bottom end of the extension strip (52) is fixedly sleeved on the air groove (54). The front wall of the retaining ring (51) Multiple air columns (56) are slidably inserted into the left and right sides of the rear wall. A control component (6) is movably connected inside the bracket (4). The control component (6) includes a first locking block (62) and a second locking block (63) slidably installed on the inner wall of the bracket (4). A limit spring (64) is fixedly connected between the first locking block (62) and the second locking block (63). Wedge grooves (65) are opened on the left and right sides of the second locking block (63). A slider (66) is slidably engaged in the wedge grooves (65).

2. The adjustable pressure band according to claim 1, characterized in that, The pulse monitoring patch (1) is connected to corresponding Velcro (2) at both ends, and a tether (3) is fixedly connected between the pulse monitoring patch (1) and the bracket (4).

3. The adjustable pressure band according to claim 1, characterized in that, The pressure pulse assembly (5) also includes a pressure plate (57) fixedly connected to the outside of the air column (56), and a sliding frame (58) is fixedly connected between the pressure plates (57).

4. The adjustable pressure band according to claim 1, characterized in that, The missing ring (51) and the pressure plate (57) are both arc-shaped, and the missing rings (51) are combined to form a pressure band with a bottom opening.

5. The adjustable pressure band according to claim 1, characterized in that, The vent (53) extends into the interior of the bladder strip (55), and a rubber ring for sealing the vent (53) is fixedly installed at the lower end of the extension strip (52).

6. The adjustable pressure band according to claim 3, characterized in that, The end of the pressure plate (57) connected to the slide frame (58) includes an elastic part with a small degree of deflection, and the end of the retaining ring (51) connected to the bracket (4) also includes an elastic part with a small degree of deflection. The connecting end of the pressure plate (57) is located at the midpoint of the line connecting the connecting ends of the retaining rings (51) on the front and rear sides.

7. The adjustable pressure band according to claim 1, characterized in that, The front and rear walls of the inner cavity of the air groove (54) both include air cavities adapted to the air column (56).

8. The adjustable pressure band according to claim 3, characterized in that, The sliding frame (58) has a sliding groove that is movably engaged with the slider (66), and the sliding frame (58) is slidably inserted into the side wall of the bracket (4).

9. The adjustable pressure band according to claim 1, characterized in that, The first locking block (62) is located at the bottom of the second locking block (63), and the bracket (4) is driven to install a threaded column (61) that is threadedly connected to the first locking block (62). The threaded column (61) is electrically driven by the pulse monitoring chip (1). The second locking block (63) is movably sleeved on the threaded column (61), and the first locking block (62) is movably locked with the lower wall of the slider (66).

10. The adjustable pressure band according to claim 1, characterized in that, A hinge rod (67) is movably connected between the second locking block (63) and the extension strip (52), and a notch corresponding to the movement of the hinge rod (67) is opened on the outer wall of the missing locking ring (51).

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