All-round self-adaptive intelligent tourniquet device

Abstract

The invention relates to an all-round self-adaptive intelligent tourniquet device. The device comprises a bandage, an arched base, a driving mechanism, a sectional air bag module, a control button, an annular track and a control center, the control center is connected with the driving mechanism, the sectional type air bag module and the control button. The two ends of the bandage penetrate through the annular rail and then are connected with the driving mechanism. The driving mechanism drives a worm gear and a worm to drive the bandage to do full-circle closed-loop motion through a motor, and is used for pressurizing the upper half circle of the arm; the sectional type air bag module is arranged in the arc-shaped interior of the arch-shaped base and used for pressurizing the lower half circumference of the arm. The control button is arranged on the outer surface of the device and issues a tightening or unbinding instruction to the control center, and the control center commands the driving mechanism and the sectional type air bag module to achieve all-round self-adaptive arm compression according to the instruction. Compared with the prior art, the invention has the advantages of uniform all-round pressure, shortened vein filling time, reduced tail end ischemia risk and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a full-circle adaptive intelligent cuff device. Background Art

[0002] During intravenous infusion or blood collection, a cuff is used to tighten a rubber tube to make the vein visible after the blood volume is filled. The cuffs in the prior art have the following limitations:

[0003] 1) Non-full-circumferential compression: Tightening the cuff only achieves localized compression on the upper part, resulting in uneven venous filling (filling efficiency is 30% lower) and easily causing unilateral strangulation marks;

[0004] 2) Continuous compression without pause: Relying on timed forced release (such as a 1-minute timer), the release cycle cannot be dynamically adjusted according to the patient's physiological state, and the risk of terminal ischemia increases by approximately 40%;

[0005] 3) Poor compatibility: Customized belts (such as reel design) cannot be compatible with commercially available disposable cuffs, increasing hospital consumables costs.

[0006] After searching, Chinese invention patent application publication number CN 111528966 A discloses an intelligent compression cuff, comprising a square housing, a rear cover, a compression mechanism, an auxiliary release mechanism, and a drive mechanism. The rear portion of the square housing is an open structure, and a mounting slot is reserved on the top wall of the square housing. The rear cover is bolted to the rear portion of the square housing, the compression mechanism is mounted inside and on the top of the square housing, the auxiliary release mechanism is fixedly mounted inside the mounting slot, and the auxiliary release mechanism is arranged in conjunction with the compression mechanism. The drive mechanism is fixedly mounted inside the square housing and is in transmission connection with the compression mechanism. The auxiliary release mechanism is used to assist the compression mechanism in automatically returning to a relaxed state. This existing patent application suffers from problems such as non-full-circumferential compression and uneven pressure detection.

[0007] How to achieve a fully adaptive intelligent pressure cuff has become a technical problem that needs to be solved. Summary of the Invention

[0008] The purpose of the present invention is to provide a full-circle adaptive intelligent cuff device in order to overcome the defects of the above-mentioned prior art.

[0009] The purpose of the present invention can be achieved by the following technical solutions:

[0010] According to one aspect of the present invention, there is provided a full-circumference adaptive intelligent cuff device, comprising a strap and an arched base, characterized in that the device further comprises a drive mechanism, a segmented airbag module, a control button, a circular track, and a control center;

[0011] The control center is connected to the driving mechanism, the segmented airbag module and the control button respectively;

[0012] The two ends of the strap pass through the annular track and are connected to the driving mechanism;

[0013] The drive mechanism drives the turbine and worm gear through the motor to drive the strap to perform full-circle closed-loop motion, which is used to pressurize the upper half of the arm;

[0014] The segmented airbag module is arranged inside the arc of the arched base to pressurize the lower half of the arm;

[0015] The control button is arranged on the outer surface of the device, and sends a tightening or loosening instruction to the control center. The control center directs the driving mechanism and the segmented airbag module to achieve full-circle adaptive arm compression according to the instruction.

[0016] Preferably, the segmented airbag module includes three groups of airbags, which are: a first airbag, a second airbag, a third airbag, a third airbag, a second airbag, and a first airbag.

[0017] More preferably, each group of airbags is inflated by an inflation mechanism, which includes an inflation tube, an inflation pump, an inflation motor, and an inflation hole located on the airbag;

[0018] Each group of airbags is connected to the air pump through the inflation hole and the inflation tube, and the air pump is driven by the inflation motor to inflate each group of airbags independently.

[0019] More preferably, the segmented airbag module is inflated in stages, including three stages:

[0020] Stage 1: A group of first airbags are inflated to a first air pressure to quickly fix the arm position;

[0021] Stage 2: A second set of airbags is inflated to a second air pressure to uniformly pressurize the arm;

[0022] Stage 3: After a group of third airbags are inflated to the third air pressure, the pressure is dynamically adjusted.

[0023] More preferably, the device further comprises an air pressure sensor array, wherein the air pressure sensor array is an 8×8 thin film air pressure sensor grid embedded in the back of each group of airbags at the bottom of the curved support surface of the arched base, for real-time monitoring of pressure deviation;

[0024] The device also includes a solenoid valve embedded in the back of each set of air bags, which is used to deflate the air bags.

[0025] Preferably, the driving mechanism includes two compression cuff reels, a first gear, a second gear, a turbine, a worm gear and a retraction motor. The two ends of the strap are respectively wrapped around the two compression cuff reels for multiple turns and then fixed. One compression cuff reel is coaxially connected to the second gear, and the other compression cuff reel is coaxially connected to the first gear. The first gear is meshed with the second gear, and the first gear is coaxially connected to the turbine. The turbine is connected to the retraction motor through the worm gear.

[0026] Preferably, the device further comprises an infrared ranging module, wherein the infrared ranging module comprises a laser sensor array consisting of six infrared laser sensors, which are equally spaced along the inner side of the arched base;

[0027] The infrared ranging module transmits the measurement results of the infrared laser sensor array to the control center, and the control center generates a 3D profile of the arm and calculates the length of the strap.

[0028] Preferably, the device further comprises a blood oxygen sensor integrated into the curved surface of the arched base, for contacting the patient's forearm skin to measure transcutaneous blood oxygen saturation.

[0029] More preferably, if the blood oxygen saturation is continuously less than the first threshold value and exceeds the set time, or the local pressure of at least one airbag in the segmented airbag module is greater than the second threshold value, the control host forces pressure relief and triggers an audible and visual alarm.

[0030] Preferably, the device further comprises a buzzer and an alarm light arranged on one side of the cuff device.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1) The present invention applies pressure to the upper half of the arm through the annular drive strap and the segmented airbag module applies pressure to the lower half of the arm. The control center directs the drive mechanism and the segmented airbag module according to instructions to achieve adaptive and uniform pressure on the entire arm.

[0033] 2) Each group of airbags in the segmented airbag module of the present invention is independently inflated and deflated, and inflated in stages, so that the arm pressure can be quickly and dynamically adjusted, the pressure is uniform, and the venous filling time is shortened to 15 seconds, which is much shorter than the traditional 30 seconds.

[0034] 3) The present invention measures the transcutaneous blood oxygen saturation of the patient's forearm skin through a blood oxygen sensor, which is more accurate than the results of finger measurement, can timely detect terminal ischemia, and force pressure relief, thereby reducing the risk of terminal ischemia by 80%.

[0035] 4) The binding strap of the present invention is wound on the cuff reel of the driving device, and can support commercially available cuffs, thereby reducing the cost of consumables by 70% and having high compatibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the structure of the medium-pressure cuff device of the present invention;

[0037] Figure 2 Schematic diagram of the assembly of the inflatable air bag in the cuff device of the present invention;

[0038] Figure 3 A schematic diagram of an inflatable airbag in the present invention;

[0039] Figure 4 Schematic diagram of the structure of the inflation mechanism of the present invention;

[0040] Figure 5 Schematic diagram of the structure of the driving mechanism of the present invention;

[0041] In the accompanying drawings, 1: compression cuff device, 101: arched base, 102: laser sensor array, 103: pressure sensor array, 2: strap, 200: contraction motor, 201: turbine, 202: first gear, 203: worm rod, 204: circular track, 205: compression cuff reel, 206: second gear, 207: shock-absorbing pad, 301: air pump, 302: inflation motor, 303: air pressure sensor array, 304: solenoid valve, 305: inflation tube, 306: inflation hole, 3071: first airbag, 3072: second airbag, 3073: third airbag, 401: control center, 403: blood oxygen sensor, 501: tightening button, 502: loosening button, 801: buzzer, 802: alarm light. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0043] In order to solve the above problems, the present invention designs an intelligent compression cuff device that can automatically achieve uniform bandaging around the entire circumference and periodic pressure release. The segmented airbag is combined with a PID algorithm to ensure pressure balance, and an integrated blood oxygen sensor dynamically adjusts the intermittent pressure release cycle. The device is compatible with conventional compression cuffs and is suitable for clinical scenarios such as venipuncture, blood collection, and infusion.

[0044] This embodiment relates to a full-circle adaptive intelligent cuff device, such as Figures 1 to 5 The device 1 includes a strap 2, an arched base 101, a driving mechanism, an infrared ranging module, a segmented airbag module, an air pressure sensor array 303, a blood oxygen sensor 403, a control button, and a control center 401.

[0045] The control center 401 is connected to the driving mechanism, the infrared ranging module, the segmented airbag module, the air pressure sensor array 303, the blood oxygen sensor 403 and the control button respectively.

[0046] The drive mechanism includes two cuff reels 205, a first gear 202, a second gear 206, a turbine 201, a worm shaft 203, and a retraction motor 200, which is used to drive the cuff 2 to perform a full-circle closed-loop motion along the annular track 204. The cuff 2 is suitable for commercially available disposable cuffs.

[0047] The annular track 204 is symmetrically fixed to the arched base 101 of the device. After the two ends of the bandage 2 pass through the annular track 204, they are respectively wrapped multiple times on the two cuff reels 205 and then fixed. One cuff reel 205 is coaxially connected to the second gear 206, and the other cuff reel 205 is coaxially connected to the first gear 202. The first gear 202 is meshed with the second gear 206. The first gear 202 is coaxially connected to the turbine 201, and the turbine 201 is connected to the contraction motor 200 through the worm 203. If the cuff needs to be replaced, the fixed ends of the two cuff reels 205 are disassembled, the old cuff is pulled out, and a new cuff is replaced. After the two ends of the cuff pass through the annular track 204, they are respectively wrapped multiple times on the two cuff reels 205 and then fixed. The replacement is completed. The helical tooth design of the worm gear makes its meshing process continuous and gradual, which has less impact and lower noise than spur gears, meeting the quiet requirements of medical environments.

[0048] The control center 401 is respectively connected to the contraction motor 200, the inflation motor 302, the infrared ranging module, the segmented airbag module, the air pressure sensor array 303, the blood oxygen sensor 403, and the control button.

[0049] The outer surface of the control button setting device 1 includes a tightening button 501 and a loosening button 502 .

[0050] The blood oxygen sensor 403 , the infrared distance measurement module and the air pressure sensor array 303 are integrated on the arched base 101 , and the segmented airbag module is arranged inside the arc of the arched base 101 .

[0051] Made of ABS plastic, the surface is covered with a silicone pad with a thickness of 5mm.

[0052] The infrared ranging module includes a laser sensor array 102 consisting of six infrared laser sensors, evenly spaced along the inner arc of the arched base 101. The scanning range covers an arm circumference of 50-150 mm with an accuracy of ±1 mm. The patient's forearm is placed on the arched base 101. The infrared ranging module transmits the measurement results of the infrared laser sensor array 102 to the control center 401, which generates a 3D outline of the arm and calculates the strap length L:

[0053] L = πD + 20, where D is the average diameter in mm.

[0054] The strap length L calculated according to the above formula helps the drive system to quickly pressurize the upper half of the arm.

[0055] like Figure 2 and Figure 3 The segmented airbag module includes three groups of airbags, namely: a first airbag 3071, a second airbag 3072, a third airbag 3073, a third airbag 3073, a second airbag 3072, and a first airbag 3071. Airbags with the same name are grouped together. The segmented airbags cover the main vein areas of the forearm (cephalic vein, basilic vein, etc.) to avoid blood flow blockage caused by single-point compression. Each group of airbags is inflated independently, and an air pressure sensor and solenoid valve (304) are embedded in the back of each group of airbags.

[0056] Each group of airbags is independently inflated by an inflation mechanism, which includes an inflation tube 305, an inflation pump 301, an inflation motor 302, and an inflation hole 306 located on the airbag.

[0057] Each airbag group is connected to an air pump 301 via an inflation port 306 and an inflation tube 305. The air pump 301 is driven by an inflation motor 302 to independently inflate each airbag group. The inflation motor 302 utilizes a low-noise, 500-rpm brushless DC motor. A 5mm-thick elastic membrane is placed between each airbag group, achieving an expanded thickness of 8mm after inflation.

[0058] The segmented airbag module uses a phased inflation logic to ensure that the inflation time does not exceed 10 seconds, including three stages:

[0059] Phase 1 (0-3 seconds): The two sets of first airbags 3071 located on the outside are inflated to the first air pressure (20 mmHg) to quickly fix the arm position;

[0060] Second stage (3-6 seconds): the two sets of second airbags 3072 are inflated to the second air pressure (40 mmHg) and pressurized evenly;

[0061] The third stage (6-9 seconds): the two groups of third airbags 3073 are dynamically adjusted (PID algorithm), and the pressure deviation is ≤5%.

[0062] The airbag is made of medical silicone, has a single volume of 50ml, and an inflation pressure range of 20-80mmHg. The actual pressurization time at each stage can be adjusted by the inflation mechanism.

[0063] The third airbag 3073 in the segmented airbag module is inflated to the third air pressure (50 mmHg), and the PID algorithm adjusts the pressure of each airbag:

[0064]

[0065] Where u(t) is the pressure of the i-th airbag, e(t) is the pressure deviation, K p , Ki and Kd are proportional, integral and differential coefficients respectively, K p =0.8,K i =0.2,K d =0.1.

[0066] The air pressure sensor array 303 is an 8×8 thin film sensor (MPX5700AP sensor) grid embedded in the bottom of the supporting surface of the arch base 101, which is used to monitor the pressure deviation in real time, with a range of 0-100 mmHg and a resolution of 1 mmHg.

[0067] The solenoid valve 304 is a miniature normally closed valve body (response time <10ms), connected to the end of the air chamber, and supports independent pressure relief.

[0068] like Figure 1 The blood oxygen sensor 403 is integrated into the front end of the surface of the arch base 101, contacts the patient's forearm skin (not fingers), and measures the transcutaneous blood oxygen saturation by reflection.

[0069] If the blood oxygen saturation remains below the first threshold (90%) for more than 10 seconds, or if the local pressure of at least one airbag exceeds the second threshold (60 mmHg), the control host 401 forces pressure relief and triggers an audible and visual alarm. This forced pressure relief triggers the solenoid valve 304 of the segmented airbag module to reduce pressure, taking less than 3 seconds.

[0070] In addition, manually pressing the release button 502 will also trigger pressure relief and energy recovery (capacitive energy storage ≤ 0.1 J).

[0071] The sound and light alarm is realized by a buzzer 801 and an alarm light 802 provided on one side of the cuff device.

[0072] The device significantly improves venous filling efficiency (shortened to 15 seconds) and reduces patient pain (score dropped by 60%), making it suitable for clinical blood collection, infusion and other scenarios.

[0073] The control center 401 includes a touch screen for displaying pressure curves, blood oxygen data and operation menus.

[0074] To enhance safety, both the retraction motor 200 and the inflation motor 302 are provided with a backup click. When either motor fails, the backup motor maintains basic functions.

[0075] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A fully adaptive intelligent cuff device, comprising a strap (2) and an arched base (101), characterized in that: The device further comprises a driving mechanism, a segmented airbag module, a control button, a circular track (204) and a control center (401); The control center (401) is connected to the driving mechanism, the segmented airbag module and the control button respectively; The two ends of the binding belt (2) pass through the annular track (204) and are connected to the driving mechanism; The driving mechanism drives the turbine and worm gear through the motor to drive the strap (2) to perform full-circle closed-loop motion, so as to pressurize the upper half of the arm; The segmented airbag module is arranged inside the arc of the arched base (101) and is used to pressurize the lower half of the arm; The control button is arranged on the outer surface of the device, and sends a tightening or loosening instruction to the control center (401). The control center directs the driving mechanism and the segmented airbag module to realize full-circle adaptive arm compression according to the instruction.

2. The all-around adaptive intelligent cuff device according to claim 1, characterized in that: The segmented airbag module includes three groups of airbags, which are: a first airbag (3071), a second airbag (3072), a third airbag (3073), a third airbag (3073), a second airbag (3072), and a first airbag (3071).

3. The all-around adaptive intelligent cuff device according to claim 2, characterized in that: Each group of airbags is inflated by an inflation mechanism, which includes an inflation tube (305), an inflation pump (301), an inflation motor (302), and an inflation hole (306) located on the airbag; Each group of airbags is connected to an air pump (301) through an air filling hole (306) and an air filling tube (305), and the air pump (301) is driven by an air filling motor (302) to independently fill each group of airbags.

4. The all-around adaptive intelligent cuff device according to claim 3, characterized in that: The segmented airbag module is inflated in three stages: Stage 1: A set of first air bags (3071) are inflated to a first air pressure for quickly fixing the arm position; Stage 2: A set of second air bags (3072) are inflated to a second air pressure for uniformly pressurizing the arm; Stage 3: After a group of third air bags (3073) are inflated to a third air pressure, the pressure is dynamically adjusted.

5. The all-around adaptive intelligent cuff device according to claim 2, characterized in that: The device further comprises an air pressure sensor array (303), wherein the air pressure sensor array (303) is an 8×8 thin film air pressure sensor grid embedded in the back of each group of airbags at the bottom of the arc-shaped support surface of the arched base (101), and is used for real-time monitoring of pressure deviation; The device further comprises a solenoid valve (304) embedded in the back of each set of air bags, for deflating the air bags.

6. The all-around adaptive intelligent cuff device according to claim 1, characterized in that: The driving mechanism comprises two compression band reels (205), a first gear (202), a second gear (206), a turbine (201), a vortex rod (203) and a contraction motor (200); the two ends of the bandage (2) are respectively wound around the two compression band reels (205) for multiple turns and then fixed; one compression band reel (205) is coaxially connected to the second gear (206); the other compression band reel (205) is coaxially connected to the first gear (202); the first gear (202) is meshed with the second gear (206); the first gear (202) is coaxially connected to the turbine (201); and the turbine (201) is connected to the contraction motor (200) via the vortex rod (203).

7. The all-around adaptive intelligent cuff device according to claim 1, characterized in that: The device further comprises an infrared distance measuring module, wherein the infrared distance measuring module comprises a laser sensor array (102) consisting of six infrared laser sensors, which are evenly distributed along the inner side of the arched base (101); The infrared distance measurement module transmits the measurement results of the infrared laser sensor array to the control center (401), and the control center (401) generates a 3D outline of the arm and calculates the length of the strap.

8. The all-around adaptive intelligent cuff device according to claim 1, characterized in that: The device further comprises a blood oxygen sensor (403) integrated on the arc surface of the arched base (101) and used for contacting the patient's forearm skin to measure transcutaneous blood oxygen saturation.

9. The all-around adaptive intelligent cuff device according to claim 8, characterized in that: If the blood oxygen saturation is continuously less than a first threshold value and exceeds a set time, or if the local pressure of at least one airbag in the segmented airbag module is greater than a second threshold value, the control host (401) is forced to release the pressure and trigger an audible and visual alarm.

10. The all-around adaptive intelligent cuff device according to claim 1, characterized in that: The device further comprises a buzzer (801) and an alarm light (802) arranged on one side of the cuff device.

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