CN216824366U - Infusion drip reminding device - Google Patents

Abstract

The utility model discloses a transfusion bit reminding device is portable bit reminding device based on capacitive sensor, utilizes the principle that the capacitance value is different when having or not having salt solution in the transfer line, measures whether having salt solution of bit pipeline through capacitive sensor, has beaten the back when salt solution, in time reminds manual operation to finish the infusion, and convenient operation and device portability are strong. Its structure includes main part, holder, electric capacity detection circuitry, microprocessor and bee calling organ, on the holder installation main part, holder one side is equipped with the exposed core that can be close to the laminating main part, and the exposed core medial surface is equipped with the draw-in groove that can hold the transfer line, electric capacity detection circuitry include capacitive sensor, capacitive sensor sets up the position that is close to the exposed core at the main part, microprocessor and bee calling organ set up in the main part, and microprocessor is all connected to electric capacity detection circuitry and bee calling organ.

Description

Infusion drip reminding device

Technical Field

The utility model relates to a medical instrument auxiliary parts technical field especially relates to a remind utensil that is arranged in infusion to remind infusion completion.

Background

Infusion therapy is commonly called as saline infusion and is a common hospital treatment means. The saline bag is hung at a high position, and is used for transfusion to a patient through a transfusion tube, and the saline bag needs to be replaced in time after one saline bag is hung each time. However, the medical staff in the hospital is complicated, and it is difficult for doctors and nurses to pay attention to each patient. The patient is often required to constantly view the drip infusion situation either by himself or by an attendant, resulting in poor rest. There is a need for an automated device that can replace manual monitoring of infusion completion and reminders.

The commonly used drip reminding device is a weighing mode and an infrared light switch scheme, the weighing mode scheme is large in size, the weighing is influenced due to the existence of the infusion pipeline, so that high weighing resolution is difficult to achieve, the infusion end cannot be accurately judged theoretically, and in order to reduce the false alarm rate, the infusion end can be only reminded in advance, and the reminding is not accurate and timely; moreover, since there are a plurality of specifications such as the capacity and material of the salt water screen, the configuration and calibration are required for each use, which is very cumbersome. And the infrared switch mode, accurate infusion pipeline of holding down or putting on the point drips the observation window, this just leads to either the too meticulous ordinary people of operation to hardly operate, or puts and influences normal infusion observation on observing the bed, has the not convenient enough problem of use.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an overcome the above-mentioned weak point of bit infusion reminding device among the prior art, provide a infusion bit reminding device, be based on capacitive sensor's portable bit reminding device, the principle that the capacitance value is different when utilizing in the transfer line to have or not salt solution, whether have salt solution through capacitive sensor measurement bit pipeline, after salt solution has been beaten, in time remind manual operation to finish the infusion, convenient operation and device portability are strong.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model discloses a transfusion bit reminding device, including main part, holder, electric capacity detection circuitry, microprocessor and bee calling organ, on the holder installation main part, holder one side is equipped with the exposed core that can be close to the laminating main part, and the exposed core medial surface is equipped with the draw-in groove that can hold the transfer line, electric capacity detection circuitry include capacitive sensor, capacitive sensor sets up the position that is close to the exposed core at the main part, microprocessor and bee calling organ set up in the main part, microprocessor is all connected to electric capacity detection circuitry and bee calling organ.

The utility model discloses a transfusion and drip reminding device utilizes holder and main part to press from both sides tight transfer line, makes the transfer line hug closely capacitive sensor after flattening slightly, and electric capacity detection circuit monitors the capacitance value by this section transfer line of centre gripping under microprocessor control. The microprocessor judges whether saline is conveyed in the infusion tube or not through the change of the capacitance value, and therefore when the saline is completely conveyed, the buzzer gives an alarm to remind. Compared with the weighing scheme in the prior art, the weighing device is small in size, portable and higher in measurement precision and sensitivity; compared with an infrared switch mode, the infusion tube can be clamped by the clamping piece and the main body part without accurately pressing the infusion tube or placing the infusion tube on the drip observation window, and the operation is more convenient.

Preferably, the clamping piece is in a card-shaped structure, and the middle of the clamping piece is hinged with the middle of the main body part and is provided with a reset torsion spring.

The capacitance detection circuit, the microprocessor and the buzzer can be integrated on a PCB and mounted in the main body part. The main body part and the clamping part can adopt card-shaped structures with certain thickness, so that the whole structure of the device is more portable. The return spring provides elastic return force for the clamping piece, so that the device forms a structure similar to a clamp and is used for clamping the infusion tube.

Preferably, the clamping piece is provided with a clamping end and a pressing end at two sides of the hinged position, the edge of the body part close to one side of the pressing end is provided with a limit screw, the tail end of the limit screw is provided with an adjusting nut, and the edge of the pressing end is provided with an open slot for accommodating the limit screw to pass through.

When the device is used, the infusion tube needs to be clamped by the clamping piece and the main body part. In actual operation, a proper clamped infusion tube is needed, so that the capacitance sensor has enough contact area and is convenient to detect capacitance values; but the excessive extrusion can not cause the smooth of the infusion part, the most suitable state is to control the extrusion deformation amount of the infusion tube to be about 50 percent, but the tube diameter material of the infusion tube has no uniform standard and has larger difference, thereby increasing certain operation difficulty. Therefore, this scheme has set up stop screw and adjusting nut who is used for restricting the holder position. The position of the pressing end of the clamping piece can be controlled by adjusting the position of the nut, so that the extrusion deformation of the infusion tube clamped by the clamping piece can be adjusted by the lever principle.

Preferably, the edge of the body part close to one side of the pressing end is provided with a notch, a rotating block is arranged in the notch, one end of the limiting screw, far away from the adjusting nut, is connected with the rotating block, and the limiting screw can swing towards the direction close to or far away from the open slot.

Preferably, one side of the main body part, which is close to the pressing end, is provided with a threaded through hole pointing to the pressing end, an anti-theft screw is arranged in the threaded through hole, the anti-theft screw is provided with a special-shaped screwing groove, and the edge of one surface, facing the main body part, of the clamping end is provided with a limiting sheet.

The antitheft screw can be screwed to limit the pressing end to move towards the main body part, so that the clamping end of the clamping piece is limited to be opened outwards. Because the edge of the clamping end is provided with the limiting piece, the whole device can not be taken down from the infusion tube when the device is not opened to a sufficient angle, and the two ends of the infusion tube are generally provided with an observation window with larger width and a flow regulating valve, so that the infusion tube can not be drawn out. The theftproof screw is equipped with the dysmorphism and twists the groove, just can remove sheltering from in order to dismantle this device of theftproof screw to the opening groove through the instrument of adaptation to play certain theftproof effect, prevent that someone from pulling sheep in the batch use of hospital.

Preferably, the capacitive sensor is a parallel distributed capacitive sensor with an interdigital structure.

The parallel distributed capacitance sensor with the interdigital structure can be tiled and arranged on one surface of the main body part, which is close to the clamping end of the clamping part, can have a larger detection area, and can accurately measure the capacitance value of the clamped infusion tube.

Preferably, the capacitance detection circuit further comprises a key switch and a button power supply, the microprocessor, the buzzer, the button power supply and the button power supply are all arranged in the main body part, and the key switch is arranged on the clamping piece.

Preferably, the capacitance detection circuit further comprises a reference capacitor, an analog switch and a TLC555 timer circuit, wherein the reference capacitor and the capacitance sensor are connected in parallel with the analog switch, the analog switch is connected with the TLC555 timer circuit, and the TLC555 timer circuit is connected with the microprocessor.

Preferably, the capacitance detection circuit further comprises a temperature detection circuit, and the temperature detection circuit is provided with a negative temperature thermistor temperature sensor and a measurement reference resistor.

Therefore, the utility model discloses following beneficial effect has: (1) the infusion tube can be judged whether the saline is completely infused or not by detecting the change of the capacitance value only by clamping the clamping piece and the main body part, the operation is convenient, and the accuracy and the sensitivity are high; (2) the extrusion deformation of the infusion tube can be adjusted and clamped to a proper degree by adjusting the limiting screw so as to adapt to infusion tubes of different materials and tube diameters, so that the detection precision is ensured, and the infusion speed is not influenced; (3) has certain anti-theft function, and prevents the sheep from being drawn smoothly in the batch use in hospitals.

Drawings

Fig. 1 is a schematic structural diagram of an infusion reminder according to an embodiment of the present application.

Fig. 2 is another schematic structural diagram of an infusion reminder according to an embodiment of the present application.

Fig. 3 is a schematic side view of an infusion reminder according to an embodiment of the present application.

Fig. 4 is a schematic view of a main body portion in the infusion solution drip reminder according to the embodiment of the present application.

Fig. 5 is a schematic circuit diagram of a capacitance detection circuit in an embodiment of the present application.

Fig. 6 is a schematic circuit diagram of a microprocessor according to an embodiment of the present application.

In the figure: 1. a main body part; 101. an open slot; 102. a threaded through hole; 2. a clamping member; 201. a card slot; 202. a clamping end; 203. pressing the end; 204. a limiting sheet; 3. a limit screw; 301. adjusting the nut; 4. rotating the block; 5. an anti-theft screw; 6. a capacitive sensor; 7. and a key switch.

Detailed Description

The invention is further described with reference to the accompanying drawings and the detailed description.

As shown in fig. 1, fig. 2 and fig. 3, the utility model discloses an infusion bit reminding device, including main part 1, holder 2, electric capacity detection circuit, microprocessor and bee calling organ, on holder 2 installation main part 1, holder 2 one side is equipped with the exposed core 202 that can be close to laminating main part 1, and exposed core 202 medial surface is equipped with the draw-in groove 201 that can hold the transfer line, electric capacity detection circuit include capacitive sensor, capacitive sensor sets up the position that is close to exposed core 202 at main part 1, microprocessor and bee calling organ set up in main part 1, and electric capacity detection circuit and bee calling organ all connect microprocessor.

The shape of holder 2 is card column structure, 2 middle parts of holder and 1 middle part of main part articulated and be equipped with reset torsion spring. The clamping member 2 is provided with a clamping end 202 and a pressing end 203 at two sides of the hinge position.

The edge of the main body part 1 close to the pressing end 203 is provided with a notch, and a rotating block 4 is arranged in the notch. The turning block 4 is provided with a limit screw 3, one end of the limit screw 3 is connected with the turning block 4, and the other end of the limit screw is provided with an adjusting nut 301. The edge of the pressing end 203 is provided with an open slot 101 for accommodating the limit screw 3 to pass through. The limit screw 3 can swing towards the direction close to or far away from the open slot 101.

The main body part 1 is provided with a threaded through hole 102 pointing to the pressing end 203 at one side close to the pressing end 203, an anti-theft screw 5 is arranged in the threaded through hole 102, and the anti-theft screw 5 is provided with a special-shaped screwing groove. The edge of the clamping end 202 facing the main body 1 is provided with a limiting piece 204.

The utility model discloses a transfusion and drip reminding device utilizes holder 2 and main part 1 to press from both sides tight transfer line, makes the transfer line flatten the back slightly and hugs closely capacitive sensor, and the capacitance value of this section transfer line of electric capacity detection circuit monitoring quilt centre gripping under microprocessor control. The microprocessor judges whether saline is conveyed in the infusion tube or not through the change of the capacitance value, and therefore when the saline is completely conveyed, the buzzer gives an alarm to remind. Compared with the weighing scheme in the prior art, the weighing device is small in size, portable and higher in measurement precision and sensitivity; compared with an infrared switch mode, the infusion tube does not need to be accurately pressed or placed on the drip observation window, the infusion tube needs to be clamped by the clamping piece 2 and the main body part 1, and the operation is more convenient.

The capacitance detection circuit, the microprocessor and the buzzer can be integrated on a PCB and mounted in the main body part 1. The main body part 1 and the clamping part 2 can adopt a card-shaped structure with a certain thickness, so that the whole structure of the device is more portable. The return spring provides an elastic return force for the clamping member 2, so that the device forms a structure similar to a clamp for clamping the infusion tube.

When the device is used, the infusion tube needs to be clamped by the clamping piece 2 and the main body part 1. In actual operation, a proper clamped infusion tube is needed, so that the capacitance sensor has enough contact area and is convenient to detect capacitance values; but the excessive extrusion can not cause the smooth of the infusion part, the most suitable state is to control the extrusion deformation amount of the infusion tube to be about 50 percent, but the tube diameter material of the infusion tube has no uniform standard and has larger difference, thereby increasing certain operation difficulty.

Therefore, this scheme has set up stop screw and adjusting nut who is used for restricting the holder position. The position of the pressing end of the clamping piece can be controlled by adjusting the position of the nut, so that the extrusion deformation of the infusion tube clamped by the clamping piece can be adjusted by the lever principle.

Meanwhile, the antitheft screw can be screwed to limit the pressing end to move towards the main body part, so that the clamping end of the clamping piece is limited to be opened outwards. Because the edge of the clamping end is provided with the limiting piece, the whole device can not be taken down from the infusion tube when the device is not opened to a sufficient angle, and the two ends of the infusion tube are generally provided with an observation window with larger width and a flow regulating valve, so that the infusion tube can not be drawn out. The theftproof screw is equipped with the dysmorphism and twists the groove, just can remove the theftproof screw to sheltering from in order to dismantle this device in opening groove through the instrument of adaptation to play certain theftproof effect, prevent that someone from pulling the sheep in hospital's batch use.

As shown in fig. 3 and 4, the capacitive sensor is a parallel distributed capacitive sensor with an interdigital structure. The parallel distributed capacitance sensor with the interdigital structure can be tiled and arranged on one surface, close to the clamping end 202 of the clamping part 2, of the main body part 1, and can have a large detection area and can accurately measure the capacitance value of the clamped infusion tube.

The capacitance detection circuit further comprises a key switch, a button power supply, a reference capacitor, an analog switch and a TLC555 timer circuit. The reference capacitor and the capacitance sensor are connected with an analog switch in parallel, the analog switch is connected with a TLC555 timer circuit, and the TLC555 timer circuit is connected with a microprocessor. The microprocessor, the buzzer, the button power supply and the button power supply are all arranged inside the main body part 1, and the key switch is arranged on the clamping part 2. The capacitance detection circuit further comprises a temperature detection circuit, and a negative temperature thermistor temperature sensor and a measurement reference resistor are arranged in the temperature detection circuit.

The following describes in detail an embodiment and principle of the capacitance detection circuit in the present solution by way of an example.

As shown in fig. 5 and 6, in this example, the parallel distributed capacitance sensor is CSensor, saline is conductive liquid, and after the sensor is clamped on the infusion tube, the saline acts as a dielectric substance of the capacitance sensor, and the capacitance C ∈ S/(4 ×. pi d), where ∈ is the dielectric constant of the distributed capacitance, S is the electrode area of the capacitance sensor, and d is the equivalent distance between the two electrodes of the capacitance sensor.

After the key switch is turned on, the microprocessor U3 starts to initialize a measurement program, calculates to obtain an initial capacitance value Cstart of the capacitance sensor CSensor, after saline water in the infusion set pipeline is reserved, the capacitance value calculated by the processor U3 can be greatly reduced, and after the reduction value exceeds a preset capacitance threshold value, the drip infusion is considered to be finished, and the buzzer BP1 is driven to buzz and remind.

The capacitance detection circuit adopts a TLC555 timer circuit, adopts a high-precision low-temperature drift resistor and an external capacitance sensor to form an RC oscillating circuit, converts capacitance physical quantity into frequency quantity which is more convenient to measure, adopts a single chip microcomputer as a microprocessor to measure input frequency change in real time in a capture mode, and can obtain capacitance conversion quantity through calculation, so that whether saline water exists in a pipeline or not can be calculated and judged.

Capacitance Ctotal is the parallel value of CT and Cref or CSensor. CSensor is a drop parallel capacitance sensor, and Cref is a reference capacitance; u2 is a high-speed analog switch with low on-resistance and low leakage, and the conduction relation between A and B1 or B2 of the single-pole double-throw analog switch U2 can be controlled by CSwitch control signal. Therefore, a dual-channel time-sharing capacitance measuring system is designed, drift, errors and the like always exist in discrete components such as TLC555 and external resistors, measurement precision and stability are affected, the capacitance sensor and the reference capacitor are switched by adopting the analog switch, the reference capacitance is measured and used as a reference value to calibrate the TLC555 oscillating circuit, and various static errors of all circuits except the analog switch due to the problems of temperature, time, initial precision and the like can be offset, so that the accuracy and stability of circuit measurement are greatly improved, and the false alarm probability is reduced.

RT1 is a negative temperature thermistor temperature sensor, the voltage division value of the reference resistor RJ1 and RT1 is measured, the resistance value of RT1 can be obtained through simple calculation, the temperature value can be obtained through table look-up or formula conversion, and the significance of temperature measurement lies in further compensating the temperature drift of the capacitance measurement circuit, especially the reference capacitor CT. Capacitance value change of the capacitance sensor caused by the existence of pipeline brine is very tiny, so that most static errors can be compensated by combining a temperature compensation algorithm and dual-channel capacitance reference measurement, and the whole sensor measurement circuit has higher precision and resolution.

Claims (9)

1. The utility model provides an infusion bit reminding device, characterized by, includes main part, holder, electric capacity detection circuitry, microprocessor and bee calling organ, on the holder installation main part, holder one side is equipped with the exposed core that can be close to the laminating main part, and the exposed core medial surface is equipped with the draw-in groove that can hold the transfer line, electric capacity detection circuitry include capacitive sensor, capacitive sensor sets up the position that is close to the exposed core at the main part, microprocessor and bee calling organ set up in the main part, microprocessor is all connected to electric capacity detection circuitry and bee calling organ.

2. The infusion drip reminder according to claim 1, wherein the holding member is in a shape of a card, and the middle part of the holding member and the middle part of the main body part are hinged and provided with a return torsion spring.

3. An infusion reminder according to claim 1 or 2, wherein the holding member has a holding end and a pressing end on both sides of the hinged position, the body portion has a limit screw at an edge thereof adjacent to the pressing end, the limit screw has an adjusting nut at an end thereof, and the pressing end has an opening slot at an edge thereof for receiving the limit screw therethrough.

4. The infusion drip reminder according to claim 3, wherein the body portion has a notch at a side edge thereof adjacent to the pressing end, the notch has a rotating block therein, and the end of the limiting screw remote from the adjusting nut is connected to the rotating block, and the limiting screw is swingable in a direction toward or away from the open slot.

5. The infusion reminder according to claim 3, wherein the main body has a threaded through hole toward the pressing end on a side thereof adjacent to the pressing end, the threaded through hole has a theft-proof screw with a shaped screw groove, and the holding end has a stopper on a side thereof facing the main body.

6. The infusion drop reminder device of claim 1, wherein the capacitive sensor is a parallel distributed capacitive sensor of an interdigitated configuration.

7. The infusion drip reminder according to claim 1, wherein the capacitance detection circuit further comprises a key switch and a button power supply, the microprocessor, the buzzer, the button power supply and the button power supply are all arranged in the main body part, and the key switch is arranged on the clamping piece.

8. The infusion drip reminder according to claim 1, wherein the capacitance detection circuit further comprises a reference capacitance, an analog switch and a TLC555 timer circuit, the reference capacitance and the capacitance sensor are connected in parallel with the analog switch, the analog switch is connected with the TLC555 timer circuit, and the TLC555 timer circuit is connected with the microprocessor.

9. The infusion drip reminder according to claim 1, wherein the capacitance detection circuit further comprises a temperature detection circuit, and the temperature detection circuit is provided with a negative temperature thermistor temperature sensor and a measurement reference resistor.

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