A spinning pressure type intelligent tourniquet

Abstract

The present invention provides a spinning type intelligent tourniquet, which includes a display and main control unit, a force application and unloading unit, a sensor and power supply unit, and a wearing unit. Inside the housing of the display and main control unit, there is an LCD display module and a main control circuit board, and function buttons are arranged on the outer side of the housing. The force application and unloading unit mainly includes a ratchet handle and a base. On one side of the handle, there is a hook release block and a synchronous limit block, and a rope winding sleeve is arranged in the upper cavity of the base. The sensor and power supply unit mainly includes a pressure sensor module, a pulse sensor module and a power supply module. The wearing unit mainly includes a rope, a strap, a hook and loop fastener integrated with a hook and a stretching band. This device can act on the limbs of the wounded, realizing the real-time display of the hemostatic pressure magnitude and the strength of the distal pulse, the function of automatic timing display by buttons, and the function of locking during the force application process. It is easy to loosen, ensuring portability and reliability while helping the wounded or medical staff to perform hemostatic first aid more correctly and effectively.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a spinning-type intelligent tourniquet for first aid. Background Art

[0002] In daily life and wars, when an open wound bleeds and the blood loss reaches more than 20% of the total blood volume, it will cause the injured to have hemorrhagic shock or even death. Therefore, when facing serious traumatic bleeding, effective hemostatic measures should be taken in time.

[0003] Currently, there are many portable tourniquet designs that can be operated with one hand and are widely used. Typical designs include: Chinese Patent Document CN28883667A discloses a first aid tourniquet. One end of the strap is fixed to the first side of the base, passes through the tourniquet handle, exits from the second side of the base, and after extending a sufficient distance, the strap passes through a multi-frame structure containing a self-tightening member. A hook member is provided on the second side of the base. After cooperating with the multi-frame member, the free end of the strap can be stretched. When initial tightening can be achieved, the self-tightening member will clamp the strap, and then the tourniquet handle is rotated to tighten the strap, giving a circumferential pressure to the limb. Finally, the tourniquet handle passes through the hole of the ring sleeve on the base to lock the position, thereby maintaining the hemostatic state.

[0004] Such designs have excellent operability and portability, but there are still some problems.

[0005] First, since the tourniquet will block the blood flow, during the use of the tourniquet, it is necessary to loosen the tourniquet for a few minutes every forty minutes to 1 hour to relieve the ischemia of the local limb and avoid causing ischemia or even necrosis of the distal limb. All such tourniquet designs record the start time node of hemostasis by handwritten notes on the time stamp, and cannot achieve automatic timing and reminder when the time is up, which may lead to too long a tying time of the tourniquet and cause limb necrosis.

[0006] Second, a relatively high tourniquet pressure will cause direct pressure damage, resulting in nerve paralysis, blood vessel or tissue damage. A relatively low tourniquet pressure will reduce the hemostatic effect and directly threaten the life safety of the wounded. Currently, few common tourniquet designs can achieve a relatively fine and continuous pressurization process. For example, in the above-mentioned tourniquet, when the tourniquet handle rotates one week, it can pass through the ring sleeve hole for locking, and the final pressure is increased step by step in a certain amount, which is likely to cause too high or too low pressure.

[0007] Thirdly, clinical evidence shows that initially using a tourniquet may be effective. After one minute, the muscle tension under the tourniquet may decrease, resulting in the failure of the tourniquet. Therefore, within a relatively longer tourniquet application time, it is inevitable to re-tighten or adjust the tourniquet. However, such a design does not have the function of monitoring the pressure applied to the tourniquet. At the same time, even if the operator promptly discovers the failure of the tourniquet, they will again face problems such as inaccurate pressure application and re-recording of time nodes, which is very inconvenient.

[0008] Fourthly, when applying the existing tourniquet design in practice, it is necessary to judge the effectiveness of hemostasis by feeling the strength of the distal pulse. However, in a single-person scenario, there is a problem that it cannot be synchronized with the pressure application, which may lead to problems such as delaying the hemostasis time.

[0009] Another example: Chinese patent document CN209548043U discloses an intelligent tourniquet based on blood pressure. A display screen for displaying the timing is provided on the outer side of the tourniquet body, an air inflation bag is provided on the inner side, and a blood pressure detection module is provided inside the air inflation bag for real-time collecting blood pressure signals and sending them to the controller. The controller can control the opening and closing of the electric air pump and the electric exhaust valve according to the blood pressure signals, and can dynamically adjust the air pressure in the air inflation bag to ensure the safety and effectiveness of the tourniquet. Such a design can provide an appropriate tourniquet pressure according to the real-time detected blood pressure signals and includes a timing display function for hemostasis, avoiding the danger caused by using the tourniquet for too long. However, the existence of the electric air pump and the exhaust valve and the fact that the airbag tourniquet pressure application completely relies on electric drive characteristics make the portability and reliability of the tourniquet unable to be guaranteed. Summary of the Invention

[0010] The purpose of the present invention is to provide a spin-press type intelligent tourniquet to solve the problems raised in the above background technology.

[0011] To achieve the above purpose, the present invention provides the following technical solutions:

[0012] A rotary pressing type intelligent tourniquet, comprising: a display and main control unit, configured to receive and process signals detected by sensors and display the timing time, the current tourniquet pressure magnitude, and the strength of the distal pulse; a force application and release unit, configured to manually increase the tourniquet pressure or relax the tourniquet; a sensor and power supply unit, configured to detect pressure and pulse signals and supply power to the entire system; a wearing unit, configured to initially wear the tourniquet on the limbs. The display and main control unit includes: a top cover, an LCD display module, a main control circuit board, a housing, a power button, and a timing button; the force application and release unit includes: a pressing spring, a pressing spring washer, a steel ball and a cage, a rope winding sleeve, a base seat, a fixing pin, a detaching hook block, a ratchet handle, a side pressing spring, and a synchronous limiting block; the base seat further includes: a first end interface, a second end interface, a rope winding opening, a pressure sensor opening, and a pulse sensor opening; the sensor and power supply unit includes: a power module, a base cover, a pulse sensor strap, a pulse sensor module, a round head bolt, and a pressure sensor module; the wearing unit includes: a strap, a hook and loop fastener integrated with a hook, a comfort gasket, and a pulse sensor strap.

[0013] Further, the pressing spring and the pressing spring washer are placed in the annular groove between the ratchet handle and the housing, and when fixed through the threaded fit of the display and main control unit and the force application and release unit, the pressing spring is compressed and provides a pre-pressure.

[0014] Further, the base seat and the ratchet handle are installed through the mating of a surface contact ratchet feature and are always in contact with each other under the action of the pre-pressure of the pressing spring.

[0015] Further, one end of the strap is fixed to the second end interface of the base seat, and the other end is a free end. During operation, it passes through the first end interface of the base seat. The strap is aligned with the end of the hook and loop fastener integrated with a hook with a slightly shorter length and is fixed by edge sewing. A stretching belt with the same length as the hook and loop fastener and a slightly narrower width is provided between the strap and the hook and loop fastener and is fixed at the end of the belt body.

[0016] Further, the rope winding sleeve is installed with a clearance fit at the hollow cylindrical port of the base seat, is connected to one end of the rope, the other end is fixed to one end of a rope belt connecting block, the other end of which is connected to the stretching belt, and the comfort gasket is sewn and fixed to the head end of the strap.

[0017] Further, the synchronous limiting block is arranged in the cylindrical chute on one side of the ratchet handle, the side pressing spring is installed at the innermost part of the chute and abuts against the synchronous limiting block, and the synchronous limiting block is connected to the detaching hook block through a fixing pin.

[0018] Further, the decoupling block includes a through-hole feature, which is sleeved on one side of the ratchet handle and connected to the synchronous limit block through a fixing pin. One side of the inner wall of the through-hole of the decoupling block includes an arc surface feature that fits with the arc surface feature on the side of the ratchet handle. When the decoupling block is toggled, the two arc surfaces abut against each other and slide relative to each other along this trajectory. At the same time, it drives the linear movement of the synchronous limit block in the chute, and at this time, the decoupling block rotates relative to the synchronous limit block with the fixing pin as the axis.

[0019] Further, the pressure sensor passes through the pressure sensor opening and adheres to the inner side of the strap, while the pulse sensor passes through the pulse sensor opening and adheres to the inner side of the pulse sensor strap.

[0020] Further, the wires of the sensor and the power supply unit are led out from the port of the hollow cylinder of the base and pass through the port of the hollow cylinder of the housing and are connected to the main control circuit board.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. The ratchet handle and the base involved in the present invention are connected by the cooperation of the surface-contact ratchet features. Due to the pre-pressure applied by the downward pressure spring, when the ratchet handle is rotated, the two surface-contact ratchets always abut against each other, and their ratchet teeth slide along the helical tooth surface. When sliding over the tooth top, it will sink under the action of the pre-pressure and fit with the next ratchet tooth surface. At the same time, it can also ensure that when the operation stops, the ratchet handle is prevented from retracting, that is, it has a locking effect.

[0023] 2. The decoupling block involved in the present invention slides in contact with the arc surface on the side of the ratchet handle according to the arc surface on one side of the inner wall of its through-hole that is consistent with the movement trajectory of the contact point, and through the cooperation of the fixing pin, when the decoupling block is toggled, it drives the synchronous limit block to move linearly in the cylindrical chute of the ratchet handle. The synchronous limit block is pressed against the winch sleeve under the action of the side pressure spring. When the working handle is rotated, the synchronous limit block contacts and slides with the winch sleeve. When passing through the card slot on the outer wall of the winch sleeve, the synchronous limit block will be embedded in the card slot. At this time, when the handle is rotated again, the winch sleeve will be driven to rotate, and the rope will be wound on the sleeve, so as to contract the stretchable belt to provide hemostatic pressure. Toggling the decoupling block to make the synchronous limit block withdraw can complete the unloading process. While ensuring reliability, it also makes the operation more convenient.

[0024] 3. The display and main control unit and sensor unit involved in the present invention, among which the sensor circuit module and the power supply module are all installed in the lower cavity of the base, and the wires pass through the through-holes of the hollow cylinder ports of the base and the housing and are connected

[0025] to the main control circuit board and the LCD display module installed inside the housing. This design can avoid the interference caused by the structure of the ratchet handle that rotates in a full circle to the wiring of the circuit module.

[0026] 4. The display, main control unit, and sensor unit involved in the present invention collect signals in real time through a pulse sensor and a pressure sensor and send them to the controller, and control the LCD display module to display the pressure applied by the tourniquet and the strength of the pulse in real time. When the timing button is pressed, the timing time is displayed. Displaying important information about the use of the tourniquet not only helps improve the effect of using the tourniquet, avoids problems such as excessive or insufficient pressure, insufficient pressure caused by muscle relaxation, and the inability to intuitively display the hemostatic effect, but also facilitates correct operations by the wounded or medical staff. Description of the Drawings

[0027] Figure 1 Schematic diagram of the overall structure of the present invention

[0028] Figure 2 Exploded view of each unit of the present invention

[0029] Figure 3 Exploded view of the display and main control unit of the present invention

[0030] Figure 4 Exploded view of the force application and unloading unit of the present invention

[0031] Figure 5 Partial cross-sectional view of the main body structure of the present invention

[0032] Figure 6 Schematic diagram of the structure of the hook release block of the force application and unloading unit of the present invention

[0033] The following further elaborates on the specific content of the present invention in conjunction with the drawings and embodiments. Detailed Description of the Preferred Embodiments

[0034] In order to make the technical means, creative features, achieved purposes, and functions of the present invention easy to understand, the following embodiments will specifically elaborate on the rotary pressing type intelligent tourniquet of the present invention in conjunction with the drawings.

[0035] Complying with the above technical solutions, the following specific embodiments of the present invention are given. It should be noted that the present invention is not limited to the following specific embodiments, and any equivalent transformation based on the technical solutions of the present application falls within the protection scope of the present invention.

[0036] Embodiment:

[0037] This embodiment provides a rotary pressing type intelligent tourniquet, as Figure 1 and Figure 2 shown, including a display and main control unit (1), a force application and unloading unit (2), a sensor and power supply unit (3), and a wearing unit (4);

[0038] The display and main control unit (1) is as Figure 3As shown in the figure, it includes: a top cover (11), an LCD display module (12), a main control circuit board (13), a housing (14), a power button (15), and a timing button (16);

[0039] The force application and unloading unit (2) is as Figure 4 shown in the figure, and includes: a downward pressure spring (21), a downward pressure spring washer (22), a steel ball and a cage (23), a cable sleeve (24), a base (25), a fixing pin (26), a detaching block (27), a ratchet handle (28), a side pressure spring (29), and a synchronous limiting block (30); The base (25) further includes: a first end interface (251), a second end interface (252), a cable opening (253), a pressure sensor opening (254), and a pulse sensor opening (255);

[0040] The sensor and power supply unit (3) is as Figure 2 shown in the figure, and includes: a power module (31), a base cover (32), a pulse sensor strap (33), a pulse sensor module (34), a round head bolt (35), and a pressure sensor module (36);

[0041] The wearing unit (4) is as Figure 2 shown in the figure, and includes: a cable (41), a comfort gasket (42), a cable connection block (43), a stretching belt (44), a hook-integrated magic tape (45), and a strap (46);

[0042] For the force application and unloading unit (2), the base (25) and the ratchet handle (28) are matched through a surface contact ratchet feature and are always in contact under the action of the downward pressure spring (21).

[0043] For the force application and unloading unit (2), the cable sleeve (24) is arranged in the upper cavity (257) of the base (25) and is in clearance fit with the hollow cylindrical port of the base (25). As Figure 5 shown in the figure, the first end of the cable (41) is connected to the cable sleeve (24), passes through the cable opening (253) of the base (25), and its second end is fixed to one end of the cable connection block (43), and the other end is connected to the stretching belt (44).

[0044] For the wearing unit (4), one end of the strap (46) is fixed to the first end interface (252) of the base (25), and the other end is a free end. During operation, it passes through the second end interface (251) of the base (25). The strap (46) is fixedly connected to the hook-integrated magic tape (45) by edge sewing. There is a stretching belt (44) with a slightly narrower width inside it, and its tail end is fixed to the tail end of the belt body.

[0045] As Figure 4 、 Figure 5 and Figure 6As shown, the force application and unloading unit (2) has a synchronous limit block (30) disposed in a cylindrical chute on one side of the ratchet handle (28). Inside the chute, there is a side compression spring (29) that abuts against the synchronous limit block (30). The synchronous limit block (30) is connected to the hook release lever (27) through a fixing pin (26). The hook release lever (27) contains a through hole that can pass through the ratchet handle (28). One side of the inner wall of the through hole contains an arc surface feature that fits with the arc surface feature on the side of the ratchet handle (28). When the hook release lever (27) is toggled, the two arc surfaces abut against each other and slide relative to each other along this track, simultaneously driving the linear movement of the synchronous limit block (30) in the chute. At this time, the hook release lever (27) rotates relative to the synchronous limit block (30) with the fixing pin (26) as the axis.

[0046] The display and main control unit (1) includes an LCD display module (12) and a main control circuit board (13), and function buttons are provided on the side, including a power button (15) and a timing button (16).

[0047] At the bottom of the housing (14) of the display and main control unit (1), there is a hollow cylindrical port with an internal thread feature that can be fixed to the hollow cylindrical port with an external thread feature of the base (25) through thread fitting. When installed, the compression spring (21) will be compressed, and at this time, a pre-pressure can be provided to the ratchet handle (28).

[0048] In the sensor and power supply unit (3), the pressure sensor module (36), the pulse sensor module (34), the power supply module (31), and the base cover (32) are all disposed in the lower cavity (256) inside the base (25). The pressure sensor passes through the pressure sensor opening (254) in the belt direction of the lower cavity (256) of the base (25) and adheres to the inner side of the strap (46), while the pulse sensor passes through the pulse sensor opening (255) on the side of the lower cavity (256) and adheres to the inner side of the pulse sensor strap (33).

[0049] The following will describe in detail the usage method of the spinning type intelligent tourniquet of this embodiment with reference to the accompanying drawings.

[0050] In the wearable unit (4) of the present invention, it surrounds the limbs of the wounded through the strap (46). The end of the strap (46) passes through the first end interface (251) of the base (25). The strap body is stretched until three fingers cannot be inserted into the gap of the strap body, and then the hook-and-loop fastener (45) of the part passing through the interface can be attached to the hook-and-loop fastener (45) of the part of the strap body that has not passed through the interface to achieve preliminary tightening. The pulse sensor is fixed at the position of the limb artery through the pulse sensor strap (33), specifically at the brachial artery of the upper arm, the radial artery of the wrist or the femoral artery. When the power button (15) on the side of the housing (14) is pressed, the pressure sensor module (36) inside the wearable unit (4) detects the pressure received during preliminary tightening, while the pulse sensor module (34) detects the strength information of the pulse wave. These contents will be displayed in real time on the LCD display module (12) of the display and main control unit (1). Rotate the ratchet handle (28) to apply pressure. When the ratchet handle (28) rotates counterclockwise, its ratchet teeth slide along the surface of the base (25) in contact with the ratchet tooth surface. Under the action of the compression spring (21), the ratchet teeth always fit together. And due to the action of the synchronous limit block (30), the winch sleeve (24) will rotate synchronously with the ratchet handle (28), thereby tightening the winch rope (41). Since the winch rope (41) is connected to the stretching strap (44) through the rope connection block (43), it is equivalent to tightening the stretching strap (44), applying a gradually increasing circumferential pressure to the strapped limb to achieve the purpose of hemostasis. And the pressure is transmitted through the wider stretching strap to relieve the limb pain of the wounded during hemostasis. At the same time, a comfortable gasket (42) with a wire groove feature is fixed on the strap (46) through sewing to prevent strong pain to the limb when the head end of the winch rope (41) applies pressure.

[0051] Rotate the ratchet handle (28) until the pulse strength signal gradually becomes weak and is lower than the set threshold, and when the applied pressure reaches a certain pressure value range, the force application process is completed. Due to the action of the surface contact ratchet teeth, even if the tightened winch rope (41) applies a reverse torque, the entire ratchet handle (28) will not retract due to the limitation of the ratchet teeth. Press the timing button (15) on the side of the housing (14) to turn on the automatic timing function and display it on the LCD display module (12). The hemostatic belt will be automatically reminded to be loosened every 40 minutes to prevent limb necrosis.

[0052] When a loosening operation is required, just pull the hook-release lever (27), and drive the synchronous limit block (30) through the fixing pin (26) to push it reversely into the chute against the side pressure of the side compression spring (29). When it completely exits the card slot (241) on the outer wall of the winch sleeve (24), the winch sleeve (24) cannot limit the shortening and tightening stroke of the winch rope (41), and it will no longer tighten under the action of the reverse torque, and the circumferential pressure applied to the limb will be greatly reduced, realizing the loosening operation.

[0053] When the decoupling block (27) is released, the synchronous limit block (30) will still be in contact with the outer wall of the rope winding sleeve (24) under the action of the lateral pressure. Therefore, when it is necessary to restore the hemostatic state again, only the ratchet handle (28) needs to be rotated, and when

[0054] it is rotated to the appropriate position, the synchronous limit block (30) will automatically be embedded in the card slot (241) of the rope winding sleeve (24) under the action of the lateral pressure spring (29), and the force application operation can be implemented by rotating again.

[0055] Functions and effects of the embodiment:

[0056] For the spinning type intelligent tourniquet according to the present invention, on the one hand, due to the design of the surface contact ratchet feature in its structure part, while increasing the regulation accuracy, the anti-lock function is realized, thereby effectively avoiding the backstepping during the force application process.

[0057] At the same time, displaying the pressure and pulse strength information on the screen can effectively avoid problems such as excessive or too small tourniquet pressure, tourniquet failure caused by muscle relaxation, and difficulty in mastering the distal pulse strength during single-person operation and thus being unable to intuitively judge the hemostatic effect.

[0058] In addition, the button timing function can be realized, the monitoring, recording and timing reminder functions of the hemostasis time can be realized to avoid sequelae caused by failure to release the tourniquet in time.

[0059] The above design can enable the wounded or relevant personnel to more clearly understand the situation of the wounded and take measures more in line with the situation of the wounded to achieve a better tourniquet use effect.

Claims

1. A spinning pressure type intelligent tourniquet, characterized in that, Comprising: A display and main control unit, a force application and release unit, a sensor and power supply unit, and a wearing unit; The display and main control unit includes: a top cover, a housing. The housing includes an LCD display module and a main control circuit board located inside the housing, and a power button and a timing button located on one side of the housing; The force application and release unit includes: a downward pressure spring, a downward pressure spring washer, steel balls and a cage, a cable sleeve, a base seat, a fixing pin, a detaching hook block, a ratchet handle, a side pressure spring, a synchronous limit block; The base seat further includes: a first end interface, a second end interface, a cable opening, a pressure sensor opening, a pulse sensor opening. The base seat is divided into upper and lower cavities; Inside one side of the ratchet handle, there is a cylindrical chute, and both the ratchet handle and the base seat have surface contact ratchet features; On the bottom surface of the housing and the top surface of the ratchet handle, there are annular grooves for installing the downward pressure spring and the downward pressure spring gasket; At the bottom of the housing, there is a hollow cylindrical port with an internal thread feature, and on the upper cavity of the base seat, there is a hollow cylindrical port with an external thread feature, for the display and main control unit and the force application and release unit to be installed through thread fitting; The sensor and power supply unit includes: a power module, a base cover, a pulse sensor strap, a pulse sensor module, a round head bolt, a pressure sensor module; The sensor and power supply unit is placed inside the lower cavity of the base seat; The wearing unit includes: a cable, a comfort gasket, a cord connection block, a stretching strap, a hook and loop fastener, a strap; Wherein, when in use, rotate the ratchet handle until the pulse strength signal is lower than the set threshold value and the pressure value reaches within the set pressure value range to complete the wearing of the rotary intelligent tourniquet; The downward pressure spring and the downward pressure spring washer are placed in the annular grooves of the ratchet handle and the housing, and when fixed through the thread fitting of the display and main control unit and the force application and release unit, the downward pressure spring is compressed and will provide a pre-pressure; The base seat and the ratchet handle are installed in cooperation through surface contact ratchet features, and the base seat and the ratchet handle are always in contact under the pre-pressure of the downward pressure spring; One end of the strap is fixed to the second end interface of the base seat, and the other end is a free end. During operation, the free end passes through the first end interface of the base seat. The strap is aligned with the end of the hook and loop fastener whose length is slightly shorter than the strap and is fixed by edge sewing. Between the strap and the hook and loop fastener, there is a stretching strap whose width is slightly narrower than the strap, and the end of the strap is fixed to the end of the stretching strap; The cable sleeve is installed in clearance fit with the hollow cylindrical port of the base seat and is connected to one end of the cable. The other end of the cable is connected to the stretching strap through a cord connection block, and the comfort gasket is sewn and fixed to the head end of the strap; The synchronous limit block is arranged in the cylindrical chute on one side of the ratchet handle. The side pressure spring is installed at the innermost side of the cylindrical chute and abuts against the synchronous limit block. The synchronous limit block and the detaching hook block are connected through a fixing pin.

2. The spin - type intelligent tourniquet according to claim 1, wherein: The decoupling block includes a through-hole feature. The decoupling block is sleeved on one side of the ratchet handle and is connected to the synchronous limit block through a fixing pin. And the inner wall of one side of the through-hole of the decoupling block includes an arc surface feature, which fits with the arc surface feature on the side of the ratchet handle. When the decoupling block is pulled, the two arc surfaces abut against each other and slide relative to each other, while driving the linear motion of the synchronous limit block in the chute. And at this time, the decoupling block rotates relative to the synchronous limit block with the fixing pin as the axis.

3. The spin - type intelligent tourniquet according to claim 1, wherein: The pressure sensor passes through the pressure sensor opening and is attached to the inner side of the strap, while the pulse sensor passes through the pulse sensor opening and is attached to the inner side of the pulse sensor strap.

4. The spin - type intelligent tourniquet according to claim 1, characterized in that: The wires of the sensor and the power supply unit are led out from the hollow cylinder port of the base and pass through the hollow cylinder port of the housing and are connected to the main control circuit board.

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