CN117122771A - Flow-control type infusion assembly - Google Patents

Abstract

The invention relates to the technical field of infusion, and provides a flow control type infusion assembly, which comprises: the infusion tube and the fixing ring are sleeved on the infusion tube, an extrusion mechanism and a flow monitoring mechanism are respectively arranged along the axial direction of the fixing ring, and the sensor is used for obtaining flow information in the infusion tube; the reader is used for reading flow information in the sensor and processing the flow information into an electric signal; the fixed ring realizes flow monitoring and flow control outside the infusion tube, so that the fixed ring can be effectively combined with any infusion tube, thereby being convenient for clinical popularization and use; the problem that the traditional infusion tube flow rate monitoring cannot be effectively converted into an electric signal is solved through the effective monitoring of the flow monitoring mechanism, the infusion tube flow rate monitoring device is combined with the extrusion structure, the effect that the infusion tube flow rate can be monitored and can be adjusted automatically is achieved, and the infusion device can be popularized on infusion of some toxic cell medicines and chemotherapy medicines.

Description

A flow-controlled infusion component

Technical field

The present invention relates to the technical field of infusion, specifically a flow-controlled infusion assembly.

Background technique

At present, the flow control and interception element in the infusion of ordinary disposable intravenous infusion tubes is a roller regulating valve. The infusion speed is adjusted by manually rolling the roller to adjust the squeezing force of the infusion tube. Manually pushing the roller upward to squeeze the infusion tube can Block the flow of the liquid medicine to achieve interception. Rolling the roller downward to reduce the pressure can increase the flow rate of the liquid medicine.

The intravenous infusion monitor currently developed realizes functions such as automatic control of flow interception and alarm for intravenous infusion. Its automatic flow shutoff uses a variety of pressure control structures and methods. These structures and methods have poor flow control, flow interception and pressure sensing effects. It is too ideal and has various flaws and shortcomings; for example, the cutting edge in the flow control and shutoff device is too sharp and can easily damage the infusion tube, while the sharp edge is too blunt, which increases the strength required for flow control and shutoff, resulting in a high power and volume of the flow control motor. Large; in addition, the intensity of flow control and closure needs to be accurately controlled. During the process of flow control, the motor needs to work normally and the power supply needs to remain unobstructed; after closure, the motor is stalled, and the power supply needs to be cut off in time to protect the motor. At the same time, Maintain a certain flow interception strength; therefore, design a flow control interception method that can achieve flow control and interception, reduce the required strength, reduce the power and volume of the flow control motor, and not damage the infusion tube, and also has pressure sensing. Functional structural parts are very necessary.

Contents of the invention

The present invention provides a flow control type infusion assembly. By improving a flow control and interception component, the required strength can be reduced, and the power and volume of the flow control motor can be reduced without damaging the flow control and interception of the infusion tube. A structural component with a pressure sensing function is used to solve the problem of the motor stalling after the flow is intercepted by the flow control cutting device in the prior art.

The existing technical solutions of the present invention are as follows:

A flow-controlled infusion assembly, including: an infusion tube, a fixed ring is set on the infusion tube, an extrusion mechanism and a flow monitoring mechanism are respectively provided along the axial direction of the fixed ring, and holes are provided on the side of the fixed ring groove;

A sensor, installed in the infusion tube, used to obtain flow information in the infusion tube;

A reader, corresponding to the same radial plane of the sensor and arranged in the fixed ring, is used to read the flow information in the sensor and process it into an electrical signal;

A processor, arranged in the fixed ring and located on one side of the reader, processes the electrical signal issued by the reader, and determines and generates instruction information, wherein the instruction information is used to issue to the squeezing mechanism, thereby changing the flow rate in the infusion tube through the squeezing mechanism.

As a technical solution of the present invention, the sensor includes:

The main body is provided with an upper chamber and a lower chamber arranged in a stack;

A coil is installed in the upper chamber;

A capacitor is arranged in the lower chamber and is in conductive contact with the coil, and is used to form an LC circuit with the coil.

As a technical solution of the present invention, the reader includes:

The reading box is installed on the surface of the fixed ring and has a reading circuit inside. The reading circuit is used to adjust the phase and frequency of the excitation signal.

As a technical solution of the present invention, the reading circuit includes:

The basic unit consists of a radio frequency amplifier, a receiver and a signal processing circuit;

A coupling loop, including switches and filter circuits, is used to emit radio frequency pulses to charge the sensor and then couple the signal from the sensor into the receiver.

As a technical solution of the present invention, the extrusion mechanism includes:

The rotating cam is composed of two oppositely arranged eccentric wheels, which are arranged in the fixed ring;

A support frame connects the connection points of the two eccentric wheels and is rotationally connected with them, and is used to rotate the rotating cam around the support frame;

A motor is located between the support frame and the rotating cam, which receives signal transmission from the processor and drives the rotating cam to rotate.

As a technical solution of the present invention, the extrusion mechanism further includes: a telescopic rod, the output end of which is connected to the support frame.

As a technical solution of the present invention, the extrusion mechanism also includes:

The interceptor rod is installed on the inner wall of the fixed ring and is an electric rod with a interceptor crossbar at the output end.

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

1. The present invention realizes flow monitoring and flow control outside the infusion tube through the fixed ring, so that it can be effectively combined with any infusion tube, thereby facilitating its clinical promotion and use; through the effective monitoring of the flow monitoring mechanism, it solves the problem in the past The problem that the flow rate monitoring of the infusion tube cannot be effectively converted into electrical signals, combined with the extrusion structure, enables the flow rate of the infusion tube to be monitored and adjusted independently, which can be promoted in the infusion of toxic cell drugs and chemotherapy drugs.

Description of the drawings

Figure 1 is a schematic three-dimensional view of the overall structure of the present invention;

Figure 2 is a schematic three-dimensional structural diagram of the extrusion mechanism of the present invention;

Figure 3 is a schematic three-dimensional structural diagram of the trapping rod of the present invention;

Figure 4 is a schematic structural flow diagram of the present invention.

In the picture:

100. Infusion tube; 200. Fixed ring; 300. Telescopic rod; 400. Rotating cam; 500. Support frame; 600. Cutting rod.

Detailed ways

The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the invention but are not intended to limit the scope of the invention.

As shown in Figures 1-4, the present invention provides a flow-controlled infusion assembly, which includes: an infusion tube 100. A fixed ring 200 is set on the infusion tube 100, and an extrusion mechanism and a flow rate are respectively provided along the axial direction of the fixed ring 200. Monitoring mechanism, the extrusion mechanism is used to squeeze the periphery of the infusion tube 100, thereby changing the flow rate in the infusion tube; the flow monitoring mechanism is used to monitor the flow in the fixed ring 200, and there are holes on the side of the fixed ring 200, and the holes are used to The fixed ring 200 is separated and the fixed ring is sleeved outside the infusion tube;

The sensor is located in the infusion tube 100. It can sense the pressure change in the infusion tube 100, thereby controlling the flow rate of the infusion, that is, it is used to obtain the flow information in the infusion tube 100;

The reader, corresponding to the same radial plane of the sensor, is located in the fixed ring 200 and is used to read the flow information in the sensor, and process the weak analog signal output by the sensor into a digital converter (ADC) or other conversion equipment. electric signal;

The processor processes the electrical signal sent by the reader, and determines and generates command information, where the command information is used to send the command information to the extrusion mechanism, thereby changing the flow rate in the infusion tube 100 through the extrusion mechanism.

As an embodiment of the invention, the sensor includes:

The main body is equipped with upper and lower chambers arranged in a stack, and the coils and capacitors are placed separately to prevent electromagnetic interference between them, thereby improving the stability and reliability of the system;

coil, located in the upper chamber;

The capacitor is located in the lower chamber and is in conductive contact with the coil. It is used to form an LC circuit with the coil. The capacitor is composed of an upper conductive element and a lower conductive element. The upper conductive element is fixed in the lower chamber and the lower conductive element is located on the lower surface of the body. , and due to changes in external pressure and the relative deflection of the upper conductive element, the relative deflection of the upper conductive element and the lower conductive element changes the capacitance of the capacitor, thereby changing the resonant frequency of the LC circuit. The change of the resonant frequency of the LC circuit represents the flow information in the infusion tube 100 ;

Readers include:

The reading box is located on the surface of the fixed ring 200 and has a reading circuit inside. The reading circuit is used to adjust the phase and frequency of the excitation signal until the frequency of the excitation signal is locked to the resonant frequency of the sensor to determine the resonant frequency of the sensor. The design purpose is to ensure that the excitation signal is consistent with the resonant frequency of the sensor, so that changes in the liquid level in the infusion tube 100 can be accurately detected.

It should be noted that the reading box can adjust the resonant frequency of the sensor to be close to the flow rate of the liquid in the infusion tube 100, or precisely control the flow rate of the liquid by changing the frequency of the excitation signal.

As an implementation manner of the present invention, the reading circuit includes:

The basic unit consists of a radio frequency amplifier, a receiver and a signal processing circuit; the radio frequency amplifier is used to increase the strength and voltage of the signal so that the signal can be sent to the receiver; the main function of the receiver is to receive the signal transmitted through the radio frequency amplifier and Convert this into an electrical signal that can be processed. The main task of the signal processing circuit is to process the received electrical signal so that it matches the resonant frequency of the sensor. It does this by adjusting the phase and frequency of the signal and sending the adjusted signal to an RF amplifier.

A coupling loop, including a switch and filter circuit, is used to emit radio frequency pulses to charge the sensor, and then couple the signal from the sensor into the receiver. The coupling loop is designed to control the flow rate of the liquid by adjusting the frequency and voltage of the radio frequency pulse. , the flow rate of the liquid in the infusion tube 100 can be accurately controlled, thereby controlling the liquid flow rate in the infusion tube 100 .

As an embodiment of the present invention, the extrusion mechanism includes:

The rotating cam 400 is composed of two oppositely arranged eccentrics. It is located in the fixed ring 200 and is used to rotate along the edge of the infusion tube 100. The rotation of the rotating cam 400 can bend the infusion tube 100, so that the infusion tube 100 can be bent along the edge of the infusion tube 100. It moves toward the inside of the fixed ring 200, thereby squeezing and pushing the infusion tube 100. The faster the rotation speed, the faster the flow rate of the infusion tube 100;

The support frame 500 connects the connection points of the two eccentric wheels and is rotationally connected with them, and is used to rotate the rotating cam 400 around a point;

The motor is located between the support frame 500 and the rotating cam 400. It receives signal transmission from the processor and rotates the rotating cam 400, thereby ensuring the stability of the rotation of the rotating cam 400 and thereby ensuring the stability of the operation of the entire device.

The motor starts and drives the rotating cam 400 to rotate. The rotating cam 400 promotes the flow of liquid inside the infusion tube 100 during the rotation. The faster the rotating cam 400 rotates, the faster the flow of liquid inside the infusion tube 100 is promoted.

As an embodiment of the present invention, the extrusion mechanism also includes: a telescopic rod 300, the output end of which is connected to the support frame 500, for pushing the rotating cam 400 to change its position, thereby pushing the rotating cam 400 to change its position, so that it contacts The edge of the infusion tube 100 is used to control the flow rate of the infusion tube 100, so that when the infusion tube 100 drips at a gravity drip speed, the component can also perform flow monitoring without directly contacting the infusion tube 100 or the rotating cam 400. Flow monitoring reduces the risk of contamination that may be caused by contact, and also improves the sensitivity and reliability of the system.

As an embodiment of the present invention, the extrusion mechanism also includes:

The intercepting rod 600 is an electric rod with an intercepting crossbar at the output end. It receives signal transmission from the processor and is used to block the infusion tube 100 when there is no liquid in the infusion tube 100, thereby avoiding the problem of blood flowing back into the infusion tube 100. This further improves the safety of use of medical equipment and reduces possible medical accidents.

Specific working principle:

During the use of the infusion tube 100, for different patients and different conditions, the intensity of flow control and flow interception in the infusion tube 100 needs to be accurately controlled.

As shown in Figure 4, the sensor located in the infusion tube 100 can control the flow rate of the infusion fluid in the infusion tube 100 by sensing the pressure change in the infusion tube 100, that is, it is used to obtain the flow information in the infusion tube 100; then the reader uses In order to read the resonant frequency of the LC circuit in the sensor, the analog signal output by the sensor is processed into an electrical signal through a digital converter (ADC) or other conversion equipment; and the processor processes the electrical signal sent by the reader, And determine to generate instruction information, where the instruction information is used to send to the extrusion mechanism, thereby changing the flow rate in the infusion tube 100 through the extrusion mechanism.

The RF amplifier in the reading circuit in the reader is used to increase the strength and voltage of the signal so that the signal can be sent to the receiver; the main function of the receiver is to receive the signal transmitted through the RF amplifier and convert it. into an electrical signal that can be processed. The main task of the signal processing circuit is to process the received electrical signal so that it matches the resonant frequency of the sensor.

As shown in Figure 1-2, assume that the initial flow rate and initial pressure of the liquid inside the infusion tube 100 are the initial values. Since there are some emergency drugs, such as dopamine, aminophylline, etc., which require rapid dripping to be effective, an infusion tube is required. When the internal liquid flow rate of 100 is greater than the initial value, the extrusion structure receives the instruction message from the processor to accelerate the infusion speed in the infusion tube 100, and the motor receives the signal transmission from the processor, and then the motor starts and drives the rotating cam 400 to rotate. , and the rotating cam 400 promotes the flow of liquid inside the infusion tube 100 during the rotation. If the rotation speed of the rotating cam 400 is accelerated, the flow of the liquid inside the infusion tube 100 will be promoted faster, thereby accelerating the flow of the liquid inside the infusion tube 100 . Beneficial effects of flow rate.

During the process of potassium supplementation, it is necessary to control the low speed, because the potassium supplementation dripping rate is too fast, which may cause hyperkalemia and cause harm to the body; at the same time, there are also some drugs that have a stimulating effect on blood vessels, such as erythromycin, etc., if the potassium supplementation rate is too fast, Dripping may cause phlebitis, so when the liquid flow rate inside the infusion tube 100 needs to be lower than the initial value, the extrusion structure receives the instruction message from the processor to slow down the infusion speed in the infusion tube 100, and the motor receives the signal from the processor. transmission, and then the motor starts and drives the rotating cam 400 to reversely rotate, and then the rotation speed of the rotating cam 400 is reduced, so that the flow rate of the liquid inside the infusion tube 100 is slowed down, thereby slowing down the flow rate of the liquid inside the infusion tube 100 .

When the type of drug to be injected is nitroglycerin or the patient's pathological condition is heart, lung, or renal insufficiency, the liquid flow rate inside the infusion tube 100 needs to be equal to the initial value, and the rotation speed of the rotating cam 400 is consistent with the initial value.

It should be noted that because different infusion tubes 100 have different diameters, the distance between different infusion tubes 100 and the fixed ring 200 is different. As shown in Figure 3, the telescopic rod 300 needs to be extended to push the rotating cam. 400 changes its position so that it moves toward the inner wall of the fixed ring 200 until it contacts the edge of the infusion tube 100, thereby achieving the purpose of controlling the flow rate of the infusion tube 100, and the liquid inside the infusion tube 100 is transported downward due to the action of gravity. When the liquid inside the infusion tube 100 is dripping by gravity, this component can also perform flow monitoring. It can perform flow monitoring without direct contact with the infusion tube 100 or the rotating cam 400, reducing the risk of contamination that may be caused by contact. , while also improving the sensitivity and reliability of the system.

The read circuit determines the resonant frequency of the sensor by adjusting the phase and frequency of the signal until the frequency of the excitation signal is locked to the resonant frequency of the sensor. It is designed to ensure that the excitation signal is consistent with the resonant frequency of the sensor, so that the infusion can be accurately detected Changes in liquid level within tube 100.

The infusion tube may be blocked during infusion, and the interceptor rod 600 receives signal transmission from the processor. When the received information is that there is no liquid in the infusion tube 100, the interceptor rod 600 extends and moves to the center of the infusion tube 100 until By preventing the liquid from flowing inside the infusion tube 100, the purpose of blocking the infusion tube 100 is achieved, thereby avoiding the problem of blood flowing back into the infusion tube 100, thus improving the safety of medical equipment and reducing possible medical accidents.

The embodiments of the present invention are given for the sake of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are illustrative and should not be construed as limitations of the present invention. , those of ordinary skill in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present invention.

Claims (7)

1. A flow-controlled infusion assembly, including: an infusion tube (100), characterized in that: the infusion tube (100) is covered with a fixed ring (200), and the fixed ring (200) is axially connected to the infusion tube. An extrusion mechanism and a flow monitoring mechanism are provided, and holes are provided on the side of the fixed ring (200); A sensor, installed in the infusion tube (100), is used to obtain flow information in the infusion tube (100); A reader, corresponding to the same radial plane of the sensor and arranged in the fixed ring (200), is used to read the flow information in the sensor and process it into an electrical signal; A processor, located in the fixed ring (200) and located on one side of the reader, processes the electrical signals sent by the reader, and determines and generates instruction information, where the instruction information is Then it is sent down to the squeezing mechanism, thereby changing the flow rate in the infusion tube (100) through the squeezing mechanism. 2. The flow-controlled infusion assembly of claim 1, wherein the sensor includes: The main body is provided with an upper chamber and a lower chamber arranged in a stack; A coil is installed in the upper chamber; A capacitor is arranged in the lower chamber and is in conductive contact with the coil, and is used to form an LC circuit with the coil. 3. The flow-controlled infusion assembly of claim 1, wherein the reader includes: The reading box is installed on the surface of the fixed ring (200) and has a reading circuit inside. The reading circuit is used to adjust the phase and frequency of the excitation signal. 4. The flow-controlled infusion assembly of claim 3, wherein the reading circuit includes: The basic unit consists of a radio frequency amplifier, a receiver and a signal processing circuit; A coupling loop, including switches and filter circuits, is used to emit radio frequency pulses to charge the sensor and then couple the signal from the sensor into the receiver. 5. The flow-controlled infusion assembly of claim 1, wherein the squeezing mechanism includes: The rotating cam (400) consists of two oppositely arranged eccentrics, which are arranged in the fixed ring (200); The support frame (500) connects the connection points of the two eccentric wheels and is rotationally connected with them, and is used to rotate the rotating cam (400) around the support frame (500); A motor is located between the support frame (500) and the rotating cam (400). It receives signal transmission from the processor and drives the rotating cam (400) to rotate. 6. The flow-controlled infusion assembly according to claim 5, characterized in that the extrusion mechanism further includes: a telescopic rod (300), the output end of which is connected to the support frame (500). 7. The flow-controlled infusion assembly of claim 1, wherein the squeezing mechanism further includes: The intercepting rod (600) is arranged on the inner wall of the fixed ring (200) and is an electric rod with a intercepting crossbar at the output end.