An adjustable extravascular compression hemostasis device

Abstract

This invention discloses an adjustable external vascular compression hemostasis device, relating to the field of vascular hemostasis technology. It includes a ring-shaped bandage, an air bladder disposed within the inner ring of the bandage, and an air supply mechanism communicating with the air bladder. The air supply mechanism is an air cylinder, which includes a piston, a one-way inlet for drawing external gas into the cylinder, a one-way outlet for inflating the air bladder, and a pressure relief valve disposed on the air bladder. The air supply mechanism also includes an assist component, which provides auxiliary thrust when pushing the piston to inflate the air bladder. The assist component includes a fixing frame and an elastic assist part. This adjustable external vascular compression hemostasis device, by introducing an assist and damping adjustment mechanism with automatic switching function, reduces the operational burden while achieving stable and precise control of the inflation process.

Description

Technical Field

[0001] This invention relates to the field of vascular hemostasis technology, and in particular to an adjustable external vascular compression hemostasis device. Background Technology

[0002] In the field of extravascular compression hemostasis, existing devices typically include a loop bandage for wrapping the limb and a compression balloon located within the inner ring of the bandage. During operation, the bandage is secured to the target site and the balloon is aligned with the blood vessel. The balloon is then inflated via a manual air supply mechanism, causing it to expand and compress the blood vessel to achieve hemostasis. A typical air supply mechanism uses an air cylinder, which connects the balloon to the external environment through ports equipped with one-way valves. The reciprocating motion of a piston completes the pumping and deflation cycles, and a pressure relief valve is installed on the balloon to release pressure after the procedure.

[0003] However, the aforementioned manual operation method faces significant problems in practical applications. As air is inflated into the cuff, the internal pressure gradually increases, leading to a sharp increase in resistance to pushing the piston. This places a considerable strain on the operator, especially medical personnel with limited physical strength. Simultaneously, under high resistance, manual operation makes it difficult to precisely control the piston stroke and inflation volume, easily causing unstable cuff pressure and affecting the controllability of hemostasis, thus limiting the device's practicality and user experience.

[0004] Therefore, there are still shortcomings and deficiencies in the existing technology. How to provide an adjustable vascular external compression hemostasis device is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide an adjustable external vascular compression hemostasis device, which solves the technical problems of existing manual compression hemostasis devices, such as high resistance during inflation, laborious operation, and inaccurate pressure control.

[0006] To achieve the above objectives, the present invention provides an adjustable vascular external compression hemostasis device, comprising an annular band, an air bladder disposed in the inner ring of the annular band, and an air supply mechanism communicating with the air bladder. The air supply mechanism is an air cylinder, which is provided with a piston, a one-way air inlet for drawing external gas into the cylinder, a one-way air outlet for inflating the air bladder, and a pressure relief valve disposed on the air bladder. The air supply mechanism also includes an assist component, which provides auxiliary thrust when pushing the piston to inflate the airbag.

[0007] Preferably, the assist component includes a fixing frame and an elastic assist part; The fixing frame includes a left side plate fixed to the cylinder body, a right side plate disposed opposite to the left side plate, a fixing rod connecting the left side plate and the right side plate, a movable plate fixedly connected to the piston rod of the piston, and a handle for driving the movable plate. The elastic assisting part includes a slide rod and an assisting spring. One end of the slide rod is fixed to the handle, and the other end passes through the right side plate. The assisting spring is fitted onto the slide rod located between the handle and the right side plate.

[0008] Preferably, it also includes an adjustable friction mechanism, which includes a connecting rod and a friction assembly. One end of the connecting rod is connected to the handle, and the friction assembly is connected to the other end of the connecting rod. The friction assembly has a friction surface that contacts the outer wall of the fixed rod.

[0009] Preferably, the friction assembly includes a plug and a friction disk, the friction disk being threadedly connected to the plug, and its height position along the axis of the plug can be adjusted by rotating the friction disk.

[0010] Preferably, it also includes a switching component, which includes a connecting plate with a through groove and a positioning shaft on the plug-in post, the positioning shaft extending into the through groove and contacting the bottom of the groove; The through groove has a horizontal groove bottom and an inclined groove wall extending upward from one end of the horizontal groove bottom; When the positioning shaft moves along the inclined groove wall, it drives the insertion post and the friction disk to move upward, causing the friction disk to disengage from the fixing rod.

[0011] Preferably, a partition plate is provided in the through groove, the partition plate is fixedly connected to the inner wall of the rear end of the through groove, and a switching plate that can swing upward is provided at one end of the partition plate facing the inclined groove wall.

[0012] Preferably, the movable plate is provided with a limiting rod on the side facing the left side plate, and the limiting rod is slidably engaged with the left side plate.

[0013] Preferably, the airbag is equipped with a pressure relief valve for releasing internal gas.

[0014] Preferably, the two ends of the ring-shaped strap are connected by a detachable connection structure.

[0015] The present invention has the following advantages: (1) Compared with the above-mentioned background technology, the adjustable vascular external compression hemostasis device provided by the present invention, by adding an assist component consisting of a fixed frame and an elastic assist part, can release pre-stored elastic energy during the high resistance stage of inflating the airbag, providing effective assistance to the operator in pushing the piston. This not only reduces the operational burden of medical staff, especially those with limited physical strength, but also makes the control of the piston stroke and inflation volume easier and more precise, thereby overcoming the problems of inaccurate pressure control and unstable hemostasis effect caused by sudden changes in resistance during manual inflation.

[0016] (2) Compared with the above-mentioned background technology, the adjustable vascular external compression hemostasis device provided by the present invention achieves dynamic damping adjustment of the rebound force of the assist spring by introducing an adjustable friction mechanism and working in conjunction with the switching component. The operator can adjust the pressure of the friction disc as needed, thereby controlling the speed of the assist release and ensuring the smoothness and controllability of the air inflating process. In addition, the mechanism can automatically release friction during the air deflation phase to avoid additional resistance, and automatically restore contact to provide damping during the air inflating phase, thereby improving the overall performance and user experience of the device while ensuring a light and smooth operating feel. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the gas supply mechanism of the present invention; Figure 3 This is a schematic diagram of the assist component structure of the present invention; Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure at point A; Figure 5 This is a schematic diagram of the switching component structure of the present invention.

[0019] In the diagram: 1. Circular strap; 2. Airbag; 3. Air supply mechanism; 4. Assist component; 5. End cap; 6. Friction mechanism; 7. Limiting cap; 8. Air port; 301. Air cylinder; 302. Piston rod; 401. Fixing frame; 402. Elastic assist part; 4011. Left side plate; 4012. Right side plate; 4013. Fixing rod; 4014. Moving plate; 4015. Limiting rod; 4016. Handle; 4021. Slide rod; 4022. Assist spring; 601. Friction component; 602. Connecting rod; 6011. Slider; 6012. Slide rail; 6013. Insertion post; 6014. Downward pressure spring; 6015. Friction disc; 6016. Switching component; 6161. Connecting plate; 6162. Through groove; 6163. Divider plate; 6164. Switching plate; 6165. Positioning shaft. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] This invention provides an adjustable external vascular compression hemostasis device, which introduces an assist and damping adjustment mechanism with automatic switching function. While reducing the operational burden, it achieves stable and precise control of the inflation process, and can solve the problems of high resistance, laborious operation and inaccurate pressure control of existing manual compression hemostasis devices during inflation.

[0023] Please refer to this as well. Figures 1 to 5 The adjustable vascular external compression hemostasis device provided by this invention mainly consists of a ring-shaped bandage 1 and a compression airbag 2 disposed in the inner ring of the bandage. The bandage adopts a ring structure, and its two ends are conveniently fixed by a detachable connection method such as Velcro. The airbag 2 is fixed to the upper end of the inner ring of the bandage, and the airbag 2 is connected to the air supply mechanism 3 through a hose. In use, the bandage is first placed on the limb where hemostasis is required, and fastened with Velcro to ensure a tight fit while aligning the airbag 2 with the target blood vessel. Then, the air supply mechanism 3 inflates the airbag 2, causing it to expand and compress the blood vessel, thereby achieving effective compression hemostasis.

[0024] Specifically, to improve operational convenience, the air supply mechanism 3 is designed as an air cylinder 301, with two air ports 8 at its outlet. One air port 8 connects to the air inlet of the air bag 2 and is specifically used for inflating the air bag 2; the other air port 8 connects to the external environment and is used for air intake of the air cylinder 301. Both air ports 8 adopt a unidirectional flow design. The air port 8 connected to the air bag 2 only allows gas to flow from inside the air cylinder 301 to the air bag 2, while the other air port 8 only allows external gas to enter the air cylinder 301, thus realizing the cyclical operation of suction and inflation. In addition, the air bag 2 is also equipped with a pressure relief valve to safely release the internal gas at the end of hemostasis, completing the pressure relief process.

[0025] In actual inflation operations, operators need to reciprocate the piston of the air cylinder 301 to perform both pumping and deflation. During the pumping phase, the air pressure is relatively low because the air port 8 is directly connected to the outside air, making the operation easier and less strenuous. However, when inflating the air bag 2, the inflation resistance increases as the internal air pressure gradually rises, requiring the operator to apply greater force. Medical staff, especially female nurses, may find this difficult due to limited physical strength. Furthermore, the inflation process requires precise control of air pressure to ensure hemostasis, and manual operation under high pressure can easily lead to inaccurate inflation, thus affecting the stability and controllability of the device.

[0026] To address this, this embodiment incorporates a dedicated assist component 4 into the device, which provides auxiliary power to the operator during inflation. This assist effectively counteracts the resistance caused by the increased internal pressure of the air bladder 2 during inflation, allowing the operator to more easily and precisely control the piston's stroke and inflation volume, thus solving the problem of difficulty in accurately controlling air pressure due to excessive resistance during manual inflation.

[0027] Specifically, the assist component 4 consists of two parts: a fixed frame 401 and an elastic assist part 402. The fixed frame 401 includes a left side plate 4011, a right side plate 4012, a fixed rod 4013, a movable plate 4014, a limiting rod 4015, and a handle 4016. The left side plate 4011 is fixed to the outside of the cylinder of the air cylinder 301, while the right side plate 4012 is located on the other side of the air cylinder 301, and the two are connected by the fixed rod 4013. The movable plate 4014 is disposed between the left and right side plates 4012 and is fixedly connected to the piston rod 302 handle of the air cylinder 301. The side of the movable plate facing the left side plate 4011 is equipped with a limiting rod 4015 that slides with the left side plate 4011, thereby ensuring that the movable plate 4014 can only move stably in the horizontal direction between the two side plates. A handle 4016 is installed on the side of the movable plate 4014 facing the right side plate 4012. The operator can push the handle 4016 to drive the movable plate 4014 to reciprocate, thereby driving the piston of the air pump 301 to complete the pumping and airing actions.

[0028] The elastic assist unit 402 is located between the handle 4016 and the right side plate 4012, and its core is the assist spring 4022 sleeved on the outside of the slide rod 4021. One end of the slide rod 4021 is fixed to the handle 4016, and the other end passes through the right side plate 4012 and is axially constrained by the end cap 5. The spring is pre-installed on the section of the slide rod 4021 between the handle 4016 and the right side plate 4012. During operation, in the air extraction stage, due to the low air pressure, the operator can easily compress the spring to store force; in the subsequent air inflation stage, the spring releases the stored elastic force, pushing the moving plate 4014 and the piston to the left, thereby providing auxiliary thrust for the inflation action, effectively reducing the operator's force burden, and improving the control accuracy and operating comfort of the entire air inflation process.

[0029] While the above setup provides assistance, the rebound force of the assist spring 4022 exhibits some instability during actual operation. Its release process may be difficult to control precisely due to the spring's inherent characteristics or external factors, thus affecting the smoothness of piston movement and the accuracy of inflation. Therefore, this embodiment further introduces an adjustable friction mechanism 6. By applying adjustable damping to the spring's rebound force, the operator can adjust the speed of the assist release according to actual needs, thereby improving the controllability and operational feel of the entire inflation process.

[0030] Specifically, the friction mechanism 6 is composed of a friction component 601 and a connecting rod 602. The friction component 601 is linked to the handle 4016 via the connecting rod 602, and can move synchronously with the movement of the handle 4016. Its friction surface is directly attached to the outer wall of the fixed rod 4013 between the left side plate 4011 and the right side plate 4012. The frictional contact between the two generates damping, thereby buffering and adjusting the rebound process of the assist spring 4022.

[0031] Considering that the friction assembly 601 increases resistance during the pumping phase while adjusting the rebound force, this embodiment further optimizes its structure to enable automatic switching of the friction contact state during air inflation and pumping. The friction assembly 601 includes a slider 6011, a slide rail 6012, a plug-in post 6013, a pressure spring 6014, a friction disc 6015, and a switching component 6016. The slider 6011 is fixed to the bottom end of the connecting rod 602 and slides with the slide rail 6012 fixed between the left and right side plates 4012 via a dovetail groove, thus achieving stable guidance during movement. The plug-in post 6013 extends longitudinally through the slider 6011, with limit caps 7 at both ends for vertical constraint. The bottom end extends out of the slider 6011 and is threadedly connected to the friction disc 6015. The bottom surface of the friction disc 6015 contacts the outer wall of the fixed rod 4013 to form a friction surface. The friction disc 6015 can be adjusted vertically via the thread, thereby changing the clamping force on the fixed rod 4013. In addition, a downward pressure spring 6014 is sleeved on the lower section of the plug post 6013. The spring is located between the slider 6011 and the bottom limiting cap 7, so that the friction disc 6015 always tends to adhere downward to the fixing rod 4013.

[0032] In actual adjustment, the height of the friction disc 6015 can be changed by rotating it. In addition, with the control of the switching element 6016, the friction disc 6015 can maintain frictional contact with the fixed rod 4013 when the handle 4016 is in the air-inflating motion, and automatically lift up and disengage during the air-vacuuming motion, thereby completely avoiding the generation of additional resistance during the air-vacuuming phase and ensuring that the operation process is easy and controllable.

[0033] The switching component 6016 mainly includes a connecting plate 6161, a through groove 6162, a partition plate 6163, a switching plate 6164, and a positioning shaft 6165. The connecting plate 6161 is fixed to the bottom of the slide rail 6012, and its interior has a through groove 6162 along its length. The positioning shaft 6165 is connected to the outer wall of the insertion post 6013 and is inserted into the through groove 6162, maintaining contact with the bottom of the groove. The through groove 6162 provides a movement guide for the positioning shaft 6165, allowing the insertion post 6013 to rise and fall accordingly when moving along the direction of the handle 4016.

[0034] The front end of the through groove 6162 penetrates the connecting plate 6161. Its bottom wall is horizontal, and one end facing the left side plate 4011 is an inclined surface, while the other end is a vertical surface. The inclined surface extends upward from the lowest point of the bottom wall of the through groove 6162. During the horizontal movement, when the positioning shaft 6165 moves to the inclined surface end, it will be guided upward by the inclined wall, thereby driving the insertion post 6013 and the friction plate 6015 to rise together, causing the friction plate 6015 to disengage from the outer wall of the fixing rod 4013.

[0035] A partition plate 6163 is provided inside the through groove 6162, and its rear end is fixedly connected to the inner wall of the rear end of the through groove 6162, located above the bottom wall of the through groove 6162. The end of the partition plate 6163 facing the vertical plane and the end facing the inclined plane are respectively spaced from the vertical plane and the inclined plane end. This space is larger than the diameter of the positioning shaft 6165, allowing the positioning shaft 6165 to move back to the bottom wall position when it reaches this end. A swingable switching plate 6164 is provided at the end of the partition plate 6163 facing the inclined plane, and one end of the switching plate 6164 is always in contact with the inclined wall.

[0036] The switching plate 6164 is rotatably connected to the partition plate 6163 via a hinge. The end of the plate that contacts the inclined wall can only swing upwards; when swinging downwards, it is restricted by the inclined wall and cannot move. Both the switching plate 6164 and the partition plate 6163 are horizontally arranged, and their top surfaces are on the same plane. Furthermore, a torsion spring can be installed at the hinge pin, allowing the switching plate 6164 to quickly return to a horizontal state after swinging upwards, thus maintaining stable switching during operation.

[0037] In this embodiment, during operation: First, the circular bandage 1 is placed on the limb requiring hemostasis and secured with Velcro, ensuring a tight fit and accurate alignment of the airbag 2 with the target blood vessel. Then, the air supply mechanism 3 is operated for inflation. This mechanism, in the form of an air cylinder 301, has a one-way air inlet 8 for drawing in external air and inflating the airbag 2. During operation, the piston is pushed back and forth by the handle 4016: During the deflating phase, the operation is easy due to the lower external air pressure, and the assist spring 4022 is compressed to accumulate elasticity; during the inflating phase, the pressure inside the airbag 2 gradually increases, increasing resistance. At this time, the assist spring 4022 releases its elasticity, assisting in pushing the piston forward, thereby reducing the operational burden and improving the control accuracy of the inflation volume. To further optimize the assisting process, the friction mechanism 6 generates adjustable damping through the contact between the friction disc 6015 and the fixed rod 4013. Rotating the friction disc 6015 changes its height, thereby adjusting the downward pressure of the friction disc 6015 and achieving fine adjustment of the assisting rebound force. Meanwhile, the switching component 6016 automatically switches the friction state during operation: when the handle 4016 drives the friction disc 6015 to move in the air pumping direction, the friction disc 6015 remains in contact with the fixed rod 4013, providing stable frictional damping; when the handle 4016 moves in the air pumping direction, the positioning shaft 6165 rises along the inclined surface of the through groove 6162, driving the friction disc 6015 to disengage from the fixed rod 4013, thus avoiding increasing the air pumping resistance.

[0038] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0039] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. An adjustable external compression hemostasis device, comprising a ring-shaped bandage (1), an air bag (2) arranged in the inner circle of the ring-shaped bandage (1), and a gas supply mechanism (3) in communication with the air bag (2), characterized in that, The gas supply mechanism (3) is a gas cylinder (301). The gas cylinder (301) is equipped with a piston, a one-way inlet (8) for drawing external gas into the cylinder, a one-way outlet (8) for inflating the air bag (2), and a pressure relief valve on the air bag (2). The air supply mechanism (3) also includes an assist component (4) for providing auxiliary thrust when pushing the piston to inflate the airbag (2).

2. The adjustable vascular external compression hemostasis device according to claim 1, characterized in that, The assist component (4) includes a fixing frame (401) and an elastic assist part (402). The fixing frame (401) includes a left side plate (4011) fixed on the cylinder of the air cylinder (301), a right side plate (4012) disposed opposite to the left side plate (4011), a fixing rod (4013) connecting the left side plate (4011) and the right side plate (4012), a moving plate (4014) fixedly connected to the piston rod (302) of the piston, and a handle (4016) for driving the moving plate (4014). The elastic assist part (402) includes a slide rod (4021) and an assist spring (4022). One end of the slide rod (4021) is fixed to the handle (4016), and the other end passes through the right side plate (4012). The assist spring (4022) is fitted on the slide rod (4021) located between the handle (4016) and the right side plate (4012).

3. The adjustable vascular external compression hemostasis device according to claim 2, characterized in that, It also includes an adjustable friction mechanism (6), which includes a connecting rod (602) and a friction assembly (601). One end of the connecting rod (602) is connected to the handle (4016), and the friction assembly (601) is connected to the other end of the connecting rod (602). The friction assembly (601) has a friction surface that contacts the outer wall of the fixed rod (4013).

4. The adjustable vascular external compression hemostasis device according to claim 3, characterized in that, The friction assembly (601) includes a plug post (6013) and a friction disk (6015). The friction disk (6015) is threadedly connected to the plug post (6013). The height position of the friction disk (6015) along the axis of the plug post (6013) can be adjusted by rotating the friction disk (6015).

5. The adjustable vascular external compression hemostasis device according to claim 4, characterized in that, It also includes a switching component (6016), which includes a connecting plate (6161) with a through groove (6162) and a positioning shaft (6165) on the plug-in post (6013). The positioning shaft (6165) extends into the through groove (6162) and contacts the bottom of the groove. The through groove (6162) has a horizontal groove bottom and an inclined groove wall extending upward from one end of the horizontal groove bottom; When the positioning shaft (6165) moves along the inclined groove wall, it drives the plug-in post (6013) and the friction disk (6015) to move upward, so that the friction disk (6015) disengages from the fixing rod (4013).

6. The adjustable vascular external compression hemostasis device according to claim 5, characterized in that, The through groove (6162) is provided with a partition plate (6163), which is fixedly connected to the inner wall of the rear end of the through groove (6162). The partition plate (6163) is provided with a switching plate (6164) that can swing upward at one end facing the inclined groove wall.

7. An adjustable vascular external compression hemostasis device according to claim 2, characterized in that, The movable plate (4014) is provided with a limiting rod (4015) on the side facing the left side plate (4011), and the limiting rod (4015) slides with the left side plate (4011).

8. The adjustable vascular external compression hemostasis device according to claim 1, characterized in that, The airbag (2) is equipped with a pressure relief valve for releasing internal gas.

9. An adjustable vascular external compression hemostasis device according to claim 1, characterized in that, The two ends of the ring-shaped strap (1) are connected by a detachable connection structure.

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