Liquid level monitoring device for liquid medicine in infusion bag

Abstract

The utility model discloses a liquid level monitoring device for liquid medicine in an infusion bag, which comprises a left clamping plate, a right clamping plate, a supporting plate, a suspension beam, a first ultrasonic generator, a first ultrasonic receiver, a power supply, an alarm and a controller, the left clamping plate, the right clamping plate and the supporting plate are detachably connected into a U shape, and the infusion bag is suspended on the suspension beam and clamped in a U-shaped space. By adjusting the horizontal distance between the left clamping plate and the right clamping plate, the initial liquid level height of liquid medicine in the infusion bag is not lower than the preset percentage of the height of the infusion bag; a first ultrasonic generator is fixed to one of the two clamping plates, a first ultrasonic receiver is fixed to the other clamping plate, the first ultrasonic generator and the first ultrasonic receiver are located at the preset height above the supporting plate, and the power source is electrically connected with the first ultrasonic generator, the first ultrasonic receiver, the alarm and the controller. The controller is electrically connected with the first ultrasonic generator, the first ultrasonic receiver and the alarm. The residual amount of the liquid medicine is effectively monitored.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices. More specifically, the utility model relates to a liquid level monitoring device for the liquid medicine in an infusion bag. Background Art

[0002] Infusion is an important and commonly used method for treating diseases at present. During the infusion process, medical staff need to select an appropriate dripping speed of the liquid medicine according to the drug characteristics and the patient's physical condition. During this period, medical staff, patients or the patient's family members need to continuously pay attention to the remaining amount of the liquid medicine in the infusion bag, so as to replace another infusion bag that needs to be used or end this infusion before the liquid medicine is completely dripped. When the number of patients who need to be infused is large, limited medical staff are busy with cumbersome matters such as drug preparation, hospitalization or discharge procedures, and handling doctor's orders, etc., and cannot ensure accurate grasp of the remaining amount of the liquid medicine in the infusion bag of each patient. In addition, patients without family members have very poor energy during the postoperative recovery period or when their condition is relatively serious, and they cannot observe the remaining amount of the liquid medicine frequently. Also, during the night infusion process, the light in the ward becomes weak, and people are prone to doze off at night, which often leads to the inability to timely feedback the remaining amount of the liquid medicine in the infusion bag. The above situations will, in the lightest case, cause the liquid medicine to run out and cause the patient to have blood return and other situations, and in the most serious case, will endanger the patient's life and lead to serious medical accidents. Therefore, it is very necessary to effectively monitor the liquid level of the liquid medicine in the infusion bag and give an effective prompt before the infusion process is about to end.

[0003] The currently commonly used liquid level monitoring technologies are divided into contact liquid level monitoring technology and non-contact liquid level monitoring technology. Considering that the liquid medicine cannot contact any external bacteria-containing environment during the infusion process, the non-contact monitoring technology is used as the monitoring method for the liquid level of the liquid medicine. The currently commonly used non-contact monitoring technologies include: visual monitoring technology, radar monitoring technology, laser monitoring technology, and infrared monitoring technology, etc. The visual monitoring technology and the radar monitoring technology need to perform an opening operation on the liquid medicine container during the operation process, which increases the risk of contaminating the liquid medicine. The laser monitoring technology requires the liquid medicine container to have a high light transmittance, but the monitoring device has a high cost and complex maintenance. Although the infrared monitoring technology has the advantages of fast response speed and high measurement accuracy, it is easily interfered by the color of the measured object and the light intensity. Summary of the Utility Model

[0004] In view of the deficiencies of the prior art, the present utility model innovatively provides a liquid level monitoring device for the liquid medicine in an infusion bag. By using the ultrasonic transmission characteristics as the principle for liquid level monitoring of a sealed container, it is not necessary to change the structure of the liquid medicine container, is not affected by factors such as the color of the object to be measured and the light intensity, has high monitoring accuracy, can greatly relieve the mental fatigue of medical staff, patients and their family members caused by real-time monitoring of the liquid level of the liquid medicine in the infusion bag during the patient's infusion process, and significantly reduces the risk of blood return in the patient and other medical accidents caused by the liquid medicine running out; has a simple structure, low cost, convenient operation, and can be applied to infusion bags of different sizes.

[0005] To achieve the above technical objectives, the present utility model discloses a liquid level monitoring device for the liquid medicine in an infusion bag, which includes a left clamping plate, a right clamping plate, a supporting plate, a suspension beam, a first ultrasonic generator, a first ultrasonic receiver, a power source, an alarm and a controller.

[0006] The left clamping plate and the right clamping plate are arranged opposite to each other. The supporting plate is fixed at the bottoms of the left clamping plate and the right clamping plate. The left clamping plate, the right clamping plate and the supporting plate are detachably connected to form a U shape. The horizontal distance between the left clamping plate and the right clamping plate is adjustable. The suspension beam is vertically fixed at the top of the left clamping plate or the right clamping plate. The infusion bag is suspended on the suspension beam and is clamped in the U-shaped space formed by the left clamping plate, the right clamping plate and the supporting plate. By adjusting the horizontal distance between the left clamping plate and the right clamping plate, the initial liquid level height of the liquid medicine in the infusion bag is not lower than a preset percentage of the height of the infusion bag.

[0007] One of the left clamping plate and the right clamping plate is fixed with the first ultrasonic generator, and the first ultrasonic receiver is fixed at a position opposite to the first ultrasonic generator on the other one. The first ultrasonic generator and the first ultrasonic receiver are fixed at the bottom of the clamping plate and are located at a preset height above the supporting plate.

[0008] The power source is electrically connected to the first ultrasonic generator, the first ultrasonic receiver, the alarm and the controller respectively. The controller is electrically connected to the first ultrasonic generator, the first ultrasonic receiver and the alarm respectively.

[0009] Further, it further includes a second ultrasonic generator, a second ultrasonic receiver, and a display. Above the first ultrasonic generator on the splint where the first ultrasonic generator is located, a plurality of the second ultrasonic generators are arranged along the height direction of the splint. On the splint where the first ultrasonic receiver is located, the second ultrasonic receivers corresponding to the number and positions of the second ultrasonic generators are arranged. The second ultrasonic generators and the second ultrasonic receivers are provided with position numbers. The second ultrasonic generators and the second ultrasonic receivers are respectively electrically connected to the controller, and the controller is electrically connected to the display.

[0010] Further, the left splint and the right splint are detachably connected by a bolt-nut assembly and the horizontal distance between the two is adjusted. The left splint and the right splint are provided with screw passing holes opposite in position.

[0011] Further, the bottoms of the left splint and the right splint are both provided with linear holes for accommodating the support plate.

[0012] Further, it further includes a front clamping plate and a rear clamping plate. The front clamping plate and the rear clamping plate are arranged opposite to each other front and back. The front clamping plate is respectively detachably connected to the left splint and the right splint. The rear clamping plate is respectively detachably connected to the left splint and the right splint.

[0013] Further, it further includes a front clamping plate and a rear clamping plate. The front clamping plate and the rear clamping plate are arranged opposite to each other front and back. The front clamping plate is vertically and fixedly connected to one of the left splint and the right splint and is detachably connected to the other. The rear clamping plate is vertically and fixedly connected to one of the left splint and the right splint and is detachably connected to the other.

[0014] Further, the first ultrasonic generator, the first ultrasonic receiver, the second ultrasonic generator, and the second ultrasonic receiver are connected to the controller through a cable or a wireless signal transmitter.

[0015] Further, the power supply is fixed on the left splint or the right splint, and the controller is fixed on the left splint or the right splint.

[0016] Further, a protective cover is fixed on the left splint and / or the right splint, and the protective cover covers the first ultrasonic generator, the first ultrasonic receiver, the power supply, and the controller.

[0017] Further, hanging rings are provided at opposite positions at the tops of the left splint and the right splint.

[0018] The beneficial effects of the present utility model are:

[0019] The liquid level monitoring device for the liquid medicine in the infusion bag of the present utility model utilizes the ultrasonic transmission characteristics as the principle for monitoring the liquid level of a sealed container. It does not require changing the structure of the liquid medicine container, is not interfered by factors such as the color of the object to be measured and the light intensity, has high monitoring accuracy, can greatly relieve the mental fatigue problems of medical staff, patients and their family members during the patient's infusion process due to the real-time monitoring of the liquid level of the liquid medicine in the infusion bag, and significantly reduces the risk of blood return and other medical accidents caused by the liquid medicine running out; it has a simple structure, low cost, convenient operation, and can be applicable to infusion bags of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is an exploded view of the liquid level monitoring device for the liquid medicine in the infusion bag according to an embodiment of the present utility model.

[0021] Figure 2 is a left perspective schematic view of the liquid level monitoring device for the liquid medicine in the infusion bag according to an embodiment of the present utility model.

[0022] Figure 3 is a right perspective schematic view of the liquid level monitoring device for the liquid medicine in the infusion bag according to an embodiment of the present utility model.

[0023] In the figure,

[0024] 1, left clamping plate; 2, right clamping plate; 3, supporting plate; 4, suspension beam; 5, first ultrasonic generator; 6, first ultrasonic receiver; 7, power supply; 8, alarm; 9, controller; 10, power supply controller; 11, second ultrasonic generator; 12, second ultrasonic receiver; 13, bolt; 14, nut; 15, screw passing hole; 16, slotted hole; 17, front clamping plate; 18, wireless signal transmitter; 19, protective cover; 20, hanging ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following will explain and illustrate in detail the liquid level monitoring device for the liquid medicine in the infusion bag provided by the present utility model in conjunction with the drawings in the specification.

[0026] This embodiment specifically discloses a liquid level monitoring device for the liquid medicine in the infusion bag, as Figures 1-3As shown in the figure, it includes a left splint 1, a right splint 2, a support plate 3, a suspension beam 4, a first ultrasonic generator 5, a first ultrasonic receiver 6, a power supply 7, an alarm 8 and a controller 9. The left splint 1 and the right splint 2 are arranged oppositely. The support plate 3 is fixed at the bottoms of the left splint 1 and the right splint 2. The left splint 1, the right splint 2 and the support plate 3 are detachably connected to form a U shape. The horizontal distance between the left splint 1 and the right splint 2 is adjustable. The suspension beam 4 is vertically fixed at the top of the left splint 1 or the right splint 2. For example, the suspension beam 4 is vertically fixed on the left splint 1. There is a through hole on the right splint 2 for the suspension beam 4 to pass through. When adjusting the horizontal distance between the left splint 1 and the right splint 2, the suspension beam 4 and the through hole move relative to each other, avoiding the suspension beam 4 affecting the adjustment of the horizontal distance between the left splint 1 and the right splint 2. The infusion bag is hung on the suspension beam 4 and clamped in the U-shaped space surrounded by the left splint 1, the right splint 2 and the support plate 3. By adjusting the horizontal distance between the left splint 1 and the right splint 2, the initial liquid level height of the liquid medicine in the infusion bag is not lower than a preset percentage of the height of the infusion bag; the left splint 1 and the right splint 2 are clamped on both sides of the two larger surfaces of the infusion bag. The infusion bag is sleeved on the suspension beam 4 through the circular hole at its upper part. The infusion bag hangs naturally. The left splint 1 and the right splint 2 are clamped on both sides of the infusion bag, squeezing the infusion bag and the liquid medicine inside it to fix the shape of the infusion bag. By adjusting the horizontal distance between the left splint 1 and the right splint 2, the initial height of the liquid level of the liquid medicine in the infusion bag is adjusted. Preferably, the preset percentage is 80%, that is, through the squeezing of the left splint 1 and the right splint 2, the height of the liquid level of the liquid medicine in the infusion bag is not lower than 80% of the height of the infusion bag, avoiding the liquid medicine in the infusion bag concentrating and accumulating at the bottom of the infusion bag; and the bottom support plate 3 plays a supporting role, making the infusion bag as square as possible, facilitating the accurate monitoring of the liquid level. The setting position of the support plate is set according to actual needs. While playing a supporting role, it can also avoid too many wrinkles appearing at the bottom of the infusion bag clustering. Preferably, the infusion bag and the liquid inside it are in a natural square state.

[0027] Optionally, the left splint 1 and the right splint 2 are detachably connected by a bolt-nut assembly and the horizontal distance between them is adjusted. There are through holes 15 for screws at opposite positions on the left splint 1 and the right splint 2. As Figures 1-3 shown, the left splint 1 and the right splint 2 are detachably connected and the distance is adjusted through two bolt-nut assemblies. The two bolt-nut assemblies are arranged diagonally. After the screws of the bolts 13 pass through the corresponding through holes 15 for screws respectively, the nuts 14 are threadedly connected to the screws. The horizontal distance between the left splint 1 and the right splint 2 is adjusted by adjusting the screwing-in distance of the nuts 14 on the screws. As Figures 1-3 shown, the through holes 15 for screws on the left splint and the right splint at the same position can both be circular through holes ( Figure 1 as shown in the upper right corner), one of the through holes 15 for screws on the two upper plates at the same position can be a circular through hole and the other can be a U-shaped hole ( Figure 1As shown in the lower left corner. The horizontal distance between the left splint 1 and the right splint 2 is adjusted according to the size of the infusion bag and the amount of liquid medicine in the infusion bag, ensuring that the initial height of the liquid level in the infusion bag is not lower than 80% of the height of the infusion bag. In this embodiment, the nut 14 is a sheep's horn nut, which is convenient for adjustment. The adjustable horizontal distance between the left splint 1 and the right splint 2 can also be applicable to infusion bags of different sizes, with a wide application range.

[0028] The materials of the left splint 1 and the right splint 2 are preferably polycarbonate, thermoplastic polyurethane, polystyrene, etc. with good transparency, and the remaining amount of liquid medicine in the infusion bag between the two splints can also be observed with the naked eye. The materials of the bolt and the nut are preferably polytetrafluoroethylene, aluminum alloy or epoxy resin, etc.

[0029] In some embodiments, the liquid level monitoring device in the infusion bag further includes a front clamping plate 17 and a rear clamping plate (not shown in the figure). The front clamping plate 17 and the rear clamping plate are arranged opposite to each other front and back. The front clamping plate 17 is detachably connected to the left splint 1 and the right splint 2 respectively. Through grooves for clamping the front clamping plate 17 can be opened on the left splint 1 and the right splint 2. The rear clamping plate is detachably connected to the left splint 1 and the right splint 2 respectively. Through grooves for clamping the rear clamping plate can be opened on the left splint 1 and the right splint 2. The front clamping plate 17 and the rear clamping plate close the front and rear sides of the U-shaped space. The front clamping plate 17, the rear clamping plate, the left splint 1 and the right splint 2 fix the infusion bag from four directions of front, back, left and right, preventing the infusion bag from falling out between the left splint 1 and the right splint 2 during tilting or shaking, and ensuring the accuracy of the monitoring result.

[0030] In another embodiment, the front clamping plate 17 is vertically and fixedly connected to one of the left splint 1 and the right splint 2 and detachably connected to the other. The rear clamping plate is vertically and fixedly connected to one of the left splint 1 and the right splint 2 and detachably connected to the other. Through grooves for the clamping plate to pass through and move are provided on the splint detachably connected to the clamping plate. When adjusting the horizontal distance between the left splint 1 and the right splint 2, the splint can move along the clamping plate through the through groove, and this method is more convenient and fast to assemble.

[0031] Optionally, such as Figure 1As shown in the figure, one-word holes 16 for accommodating the support plate 3 are provided at the bottoms of the left clamping plate 1 and the right clamping plate 2. The height of the one-word hole 16 is slightly greater than the height of the support plate 3. Preferably, the height difference between the one-word hole 16 and the support plate 3 is 0.2 mm - 0.5 mm. The setting positions of the one-word holes 16 on the left clamping plate 1 and the right clamping plate 2 are set according to actual needs. Multiple one-word holes 16 can also be provided along the height direction at the bottoms of the left clamping plate 1 and the right clamping plate 2, and the position of the one-word hole 16 into which the support plate 3 is inserted is selected according to the height of the infusion bag to be detected. When adjusting the horizontal distance between the left clamping plate 1 and the right clamping plate 2, the front clamping plate 17, the rear clamping plate and the support plate 3 will move in the corresponding holes or grooves, without affecting the adjustment of the distance between the left clamping plate 1 and the right clamping plate 2. It is also possible to insert the front clamping plate 17, the rear clamping plate and the support plate 3 into the corresponding holes or grooves after the distance between the left clamping plate 1 and the right clamping plate 2 is adjusted. The front clamping plate 17, the rear clamping plate and the support plate 3 play a role in assisting in fixing the infusion bag.

[0032] As Figures 1-3 As shown in the figure, a first ultrasonic generator 5 is fixed on one of the left clamping plate 1 and the right clamping plate 2, and a first ultrasonic receiver 6 is fixed at a position opposite to the first ultrasonic generator 5 on the other one, that is, the first ultrasonic generator and the first ultrasonic receiver are arranged oppositely. The first ultrasonic generator 5 and the first ultrasonic receiver 6 are fixed at the bottom of the clamping plate and at a preset height above the support plate 3, ensuring that the positions where the first ultrasonic generator 5 and the first ultrasonic receiver 6 are located are aligned with the liquid medicine accommodating cavity of the infusion bag, there is liquid medicine, and it is close to the bottom of the liquid medicine accommodating cavity of the infusion bag. The first ultrasonic generator 5 is used to emit ultrasonic signals, and the first ultrasonic receiver 6 is used to receive ultrasonic signals. When the ultrasonic emission signals are the same, the ultrasonic receiving signals will change because the media through which the ultrasonic waves pass are different. Fixing holes are provided on both the left clamping plate 1 and the right clamping plate 2. The first ultrasonic generator 5 and the first ultrasonic receiver 6 are embedded and fixed in the corresponding fixing holes. The vertical distance between the axes of the first ultrasonic generator 5 and the first ultrasonic receiver 6 ≤ 1 mm, ensuring the accuracy of signal reception. Preferably, the setting positions of the first ultrasonic generator 5 and the first ultrasonic receiver 6 are 5% - 10% of the height of the infusion bag from the bottom.

[0033] The power supply 7 is electrically connected to the first ultrasonic generator 5, the first ultrasonic receiver 6, the alarm 8, and the controller 9 respectively. The power supply 7 supplies power to the first ultrasonic generator 5, the first ultrasonic receiver 6, the alarm 8, and the controller 9. The power supply 7 is fixed on the left splint 1 or the right splint 2. The power supply 7 can be a dry battery, a button battery, or a 12V DC power supply. The controller 9 is electrically connected to the first ultrasonic generator 5, the first ultrasonic receiver 6, and the alarm 8 respectively. The controller 9 is fixed on the left splint 1 or the right splint 2. The first ultrasonic generator 5 and the first ultrasonic receiver 6 are connected to the controller 9 through a cable or a wireless signal transmitter 18. In this embodiment, the first ultrasonic generator 5 is fixed on the left splint 1, and the wireless signal transmitter 18 for realizing the electrical connection between the first ultrasonic generator 5 and the controller 9 is fixed on the left splint 1; the first ultrasonic receiver 6 is fixed on the right splint 2, and the wireless signal transmitter 18 for realizing the electrical connection between the first ultrasonic receiver 6 and the controller 9 is fixed on the right splint 2. The power supply 7, the alarm 8, the controller 9, and the wireless signal transmitter 18 are fixed on the surface of the splint away from the infusion bag.

[0034] In this embodiment, the alarm 8 is a sound alarm or an audible and visual alarm.

[0035] When monitoring the liquid level of the liquid medicine in the infusion bag, before infusion, hang the infusion bag on the suspension beam 4, assemble the left splint 1, the right splint 2, the front clamping plate 17, the rear clamping plate, and the support plate 3. Clamp the infusion bag by adjusting the horizontal distance between the left splint 1 and the right splint 2 and make the liquid level of the liquid medicine in the infusion bag not lower than 80% of the height of the infusion bag. Moreover, through the auxiliary action of the support plate 3, the front clamping plate 17, and the rear clamping plate, the infusion bag is made close to a square shape; at this time, there is liquid medicine at the positions of the first ultrasonic generator 5 and the first ultrasonic receiver 6. During infusion, the controller 9 controls the first ultrasonic generator 5 to continuously emit the same ultrasonic signal or emit the same ultrasonic signal every interval of a period of time, such as 5s or 10s. If there is liquid medicine between the first ultrasonic generator 5 and the first ultrasonic receiver 6, then the ultrasonic signals received by the first ultrasonic receiver 6 are the same or close. However, when the liquid level of the liquid medicine is lower than the first ultrasonic generator 5 and the first ultrasonic receiver 6, that is, the medium through which the ultrasonic wave passes changes from the liquid medicine to the air, the ultrasonic signal received by the first ultrasonic receiver 6 will change greatly. The controller 9 then judges that the liquid level of the liquid medicine is lower than the positions of the first ultrasonic generator 5 and the first ultrasonic receiver 6, that is, the liquid level of the liquid medicine is lower than the preset height, indicating that the liquid medicine is about to be finished. The controller 9 controls the alarm 8 to give an alarm to remind medical staff, patients, or the family members of the patients. The controller 9 can use a control chip commonly used in the prior art, and its control method is also the performance of the control chip itself.

[0036] This embodiment utilizes the ultrasonic transmission characteristics to monitor the liquid level of the liquid medicine in the infusion bag, with accurate monitoring. It gives an alarm prompt before the infusion ends, greatly alleviating the problem of mental fatigue of medical staff, patients, and patient families during the patient's infusion process due to the real-time monitoring of the liquid level of the liquid medicine in the infusion bag, and significantly reducing the risk of blood return and other medical accidents caused by the liquid medicine running out.

[0037] In some embodiments, the liquid level monitoring device for the liquid medicine in the infusion bag further includes a second ultrasonic generator 11, a second ultrasonic receiver 12, and a display. Above the first ultrasonic generator 5 on the clamp where the first ultrasonic generator 5 is located, a plurality of second ultrasonic generators 11 are arranged along the height direction of the clamp. On the clamp where the first ultrasonic receiver 6 is located, second ultrasonic receivers 12 corresponding to the number and position of the second ultrasonic generators 11 are arranged. The number and position of the second ultrasonic generator and the second ultrasonic receiver correspond one by one. The second ultrasonic generator 11 and the second ultrasonic receiver 12 are provided with position numbers, and the position numbers of the second ultrasonic generator 11 and the second ultrasonic receiver 12 arranged oppositely at the same height are the same. For example, the position numbers of the second ultrasonic generator 11 and the second ultrasonic receiver 12 at the highest position are 1, the position numbers of the second ultrasonic generator 11 and the second ultrasonic receiver 12 at the second position from top to bottom are 2, and so on. The second ultrasonic generator 11 and the second ultrasonic receiver 12 are respectively electrically connected to the controller 9, and the controller 9 is electrically connected to the display. The second ultrasonic generator 11 and the second ultrasonic receiver 12 are connected to the controller 9 through a cable or a wireless signal transmitter 18. The second ultrasonic generator 11 and the second ultrasonic receiver 12 are electrically connected to a power supply, and the power supply supplies power to them. Preferably, the number of both the second ultrasonic generator 11 and the second ultrasonic receiver 12 is 5 - 10. The distance between adjacent second ultrasonic generators 11 is the same as the distance between the lowermost second ultrasonic generator 11 and the first ultrasonic generator 5.

[0038] During the infusion process, as the liquid medicine is consumed, the liquid level of the liquid medicine drops, and the received signal received by the second ultrasonic receiver 12 at the position where the liquid medicine is consumed will change. The signal is transmitted to the controller 9 and displayed on the display. The position numbers of the second ultrasonic receivers 12 at the positions where the liquid medicine exists are displayed on the display to indicate the remaining amount of the liquid medicine in the infusion bag, facilitating medical staff, patients, or patient families to master the infusion progress. When the liquid level of the liquid medicine in the infusion bag is lower than the first ultrasonic generator 5 and the first ultrasonic receiver 6, it indicates that the liquid medicine is about to be finished, and the controller 9 controls the alarm 8 to give an alarm.

[0039] As Figure 1As shown, a protective cover 19 is fixed on the left splint 1 and / or the right splint 2. The protective cover 19 covers the first ultrasonic generator 5, the first ultrasonic receiver 6, the power supply 7 and the controller 9, playing a protective role. The protective cover 19 is fixed to the splint by screws. The second ultrasonic generator 11 and the second ultrasonic receiver 12 are also covered within the protective cover 19. The display and the alarm 8 can be exposed outside the protective cover 19. In this embodiment, protective covers are fixed on both the left splint 1 and the right splint 2. The protective cover on the left splint 1 protects the first ultrasonic generator 5, the second ultrasonic generator 11, the controller 9, the wireless signal transmitter 18 and the alarm 8. The protective cover 19 on the right splint 2 protects the first ultrasonic receiver 6, the second ultrasonic receiver 12, the power supply 7 and the wireless signal transmitter 18.

[0040] In some embodiments, hanging rings 20 are provided at opposite positions at the top of the left splint 1 and the right splint 2. Preferably, two hanging rings 20 arranged front and back are fixed on both the left splint 1 and the right splint 2. The hanging rings 20 are connected to the support mechanism through ropes to keep the liquid level monitoring device in the infusion bag stable, so that the liquid level in the infusion bag remains horizontal.

[0041] In some embodiments, a power supply controller 10, i.e., a switch, is connected to the output end of the power supply 7, which is used to control the energization of the power supply circuit, that is, to control the activation of the liquid level monitoring device in the infusion bag, saving the electrical energy of the power supply 7.

[0042] This application not only improves the accuracy of liquid level monitoring of the infusion bag medicine solution, reduces the workload of medical staff, and significantly reduces the risk of blood return in patients and other medical accidents caused by the medicine solution running out. Moreover, it has a simple structure, low cost, convenient operation, and can be applied to infusion bags of different sizes.

[0043] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0044] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication between the exteriors of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0045] In the description of this specification, the descriptions referring to terms such as "this embodiment", "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any at least one embodiment or example. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0046] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and simple improvements made to the substantial content of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A device for monitoring the liquid level of a drug in an infusion bag, characterized in that: The invention comprises a left clamping plate (1), a right clamping plate (2), a supporting plate (3), a suspension beam (4), a first ultrasonic generator (5), a first ultrasonic receiver (6), a power supply (7), an alarm (8) and a controller (9). The left clamp (1) and the right clamp (2) are arranged opposite to each other, the support plate (3) is fixed at the bottom of the left clamp (1) and the right clamp (2), the left clamp (1), the right clamp (2) and the support plate (3) are detachably connected to form a U-shape, the horizontal distance between the left clamp (1) and the right clamp (2) is adjustable, the suspension beam (4) is vertically fixed to the top of the left clamp (1) or the right clamp (2), the infusion bag is suspended on the suspension beam (4) and clamped in the U-shaped space surrounded by the left clamp (1), the right clamp (2) and the support plate (3), and the initial liquid level of the infusion bag is not lower than a preset percentage of the height of the infusion bag by adjusting the horizontal distance between the left clamp (1) and the right clamp (2); The first ultrasonic generator (5) is fixed on one of the left clamping plate (1) and the right clamping plate (2), and the first ultrasonic receiver (6) is fixed at a position opposite to the first ultrasonic generator (5) on the other clamping plate. The first ultrasonic generator (5) and the first ultrasonic receiver (6) are fixed at the bottom of the clamping plate and are located at a preset height above the support plate (3). The power supply (7) is electrically connected to the first ultrasonic generator (5), the first ultrasonic receiver (6), the alarm (8) and the controller (9), respectively; and the controller (9) is electrically connected to the first ultrasonic generator (5), the first ultrasonic receiver (6) and the alarm (8), respectively.

2. The device for monitoring the liquid level of the infusion bag according to claim 1, characterized in that: The device also comprises a second ultrasonic generator (11), a second ultrasonic receiver (12) and a display. A plurality of the second ultrasonic generators (11) are arranged above the first ultrasonic generator (5) along the height direction of the clamping plate where the first ultrasonic generator (5) is located. The clamping plate where the first ultrasonic receiver (6) is located is provided with second ultrasonic receivers (12) corresponding to the number and position of the second ultrasonic generators (11). Position numbers are provided on the second ultrasonic generators (11) and the second ultrasonic receivers (12). The second ultrasonic generators (11) and the second ultrasonic receivers (12) are respectively electrically connected to the controller (9), and the controller (9) is electrically connected to the display.

3. The device for monitoring the liquid level of the drug in the infusion bag according to claim 1 or 2, characterized in that: The left clamping plate (1) and the right clamping plate (2) are detachably connected via a bolt and nut assembly and the horizontal distance between the two can be adjusted. The left clamping plate (1) and the right clamping plate (2) are provided with screw rod passing holes (15) located opposite to each other.

4. The device for monitoring the liquid level of the drug in the infusion bag according to claim 1 or 2, characterized in that: The bottoms of the left clamping plate (1) and the right clamping plate (2) are both provided with a straight hole (16) for accommodating the support plate (3).

5. The device for monitoring the liquid level of the drug in the infusion bag according to claim 1 or 2, characterized in that: It also comprises a front card plate (17) and a rear card plate, wherein the front card plate (17) and the rear card plate are arranged relative to each other in front and back, the front card plate (17) is detachably connected to the left clamping plate (1) and the right clamping plate (2) respectively, and the rear card plate is detachably connected to the left clamping plate (1) and the right clamping plate (2) respectively.

6. The device for monitoring the liquid level of the drug in the infusion bag according to claim 1 or 2, characterized in that: It also includes a front card plate (17) and a rear card plate, wherein the front card plate (17) and the rear card plate are arranged relative to each other in the front and rear directions, wherein the front card plate (17) is vertically fixedly connected to one of the left clamping plate (1) and the right clamping plate (2) and is detachably connected to the other, and wherein the rear card plate is vertically fixedly connected to one of the left clamping plate (1) and the right clamping plate (2) and is detachably connected to the other.

7. The device for monitoring the liquid level of the infusion bag according to claim 2, characterized in that: The first ultrasonic generator (5), the first ultrasonic receiver (6), the second ultrasonic generator (11) and the second ultrasonic receiver (12) are connected to the controller (9) via a cable or a wireless signal transmitter (18).

8. The device for monitoring the liquid level of the drug in the infusion bag according to claim 1 or 2, characterized in that: The power source (7) is fixed on the left clamping plate (1) or the right clamping plate (2), and the controller (9) is fixed on the left clamping plate (1) or the right clamping plate (2).

9. The device for monitoring the liquid level of the drug in the infusion bag according to claim 1 or 2, characterized in that: A protective cover (19) is fixed on the left clamping plate (1) and / or the right clamping plate (2), and the protective cover (19) covers the first ultrasonic generator (5), the first ultrasonic receiver (6), the power supply (7) and the controller (9).

10. The device for monitoring the liquid level of a drug in an infusion bag according to claim 1 or 2, characterized in that: Hanging rings (20) are provided at the top positions of the left clamping plate (1) and the right clamping plate (2) at opposite positions.

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