CN2413716Y - Automatic indication alarm device for venous transfusion - Google Patents

Abstract

The utility model relates to the field of medical devices, which relates to a monitoring device for a venous transfusion device which is mainly used in a hospital. A liquid drop sensor is arranged at the position of a drop bucket close to the middle, and is composed of an infrared emitter and an infrared receiver. A magnifying shaping circuit is connected with the liquid drop sensor. Two branch circuits are connected with the output end of the magnifying shaping circuit, and are a time measurement display circuit and an alarm circuit. The utility model has the purposes of solving the problems that nursing personnel monitor transfusion in the course of transfusion, the speed of drops is estimated by people, etc.

Description

Automatic display alarm for intravenous infusion

This utility model relates to medical instruments field, mainly is to be applied to the device in the hospital intravenous transfusion device monitored.

Present existing intravenous transfusion device does not have alarm signal when infusing to patient, for preventing malpractice, need patient or guardian to monitor the transfusion situation constantly, so just make nurse personnel spirit tired out easily, very easily carelessness, an absent-mindedness slightly just causes adverse consequences easily.In addition, some medicinal liquids needs fast dripping, and as SHUANGHUANLIAN, some medicine need drip slowly, and as erythromycin family, the speed that these snack made with traditional Chinese medicines drip mainly is to be estimated artificially by the nurse, and very science not is very big to the curative effect influence of medicinal liquid.

At problem set forth above, this utility model provides a kind of automatic display alarm for intravenous infusion, need the nurse personnel when its purpose is to solve transfusion monitors and the speed of medicinal liquid drop such as estimates artificially at the problem of aspect existence.

This utility model comes to be realized by the following technical programs:

A kind of automatic display alarm for intravenous infusion is characterized in that: place in the middle of the dropping funnel of intravenous transfusion device is near, be provided with liquid drop sensor, and it is made up of RF transmitter and infrared receiver; An amplification integeral type circuit is connected with liquid drop sensor, and what be connected with the outfan of amplification integeral type circuit has two branch roads, and one is the measure of time display circuit, and one is warning circuit.

It is 38KHz that RF transmitter in the liquid drop sensor adopts carrier frequency.

Advantage of the present utility model and effect:

This utility model is compared with old infusion techn, old infusion techn needs human eye to estimate the interval of drop, error in dipping is big, directly be presented on the liquid crystal board and new technology is a interval (cycle) with drop, the interval of drop is pressed the explanation on the package insert, and is more direct like this, more accurate.Old infusion techn needs the people to pay close attention to the Liquid dropping bottle liquid level variation constantly, can not be careless and inadvertent.And new infusion techn makes it send alarm sound when transfusion finishes, and the reminds people transfusion has finished, and pulls out infusion needle.The people is freed from the work of the anxiety that stares at infusion bottle, alleviated people's mental burden.This utility model can accurately show the interval of drop, and can bring the security and comfort to patient, alleviates patient and family members' mental burden.

In addition, the patient who in hospital ward, infuses, if adopt the automatic display alarm of static transfusion, their time cycle and alarm signal also can adopt multi-path digital switch coding, send into by network in the computer of nurses' office, make the nurse just can recognize each patient infusion situation in the ward in office, promptly transfusion time, flow velocity all can come into plain view on display screen, improve nurse's work efficiency greatly.Overcome the deficiency of existing infusion techn, satisfy the modern medical service development of career.

Accompanying drawing 1 is a circuit block diagram of the present utility model;

Accompanying drawing 2 is the scheme of installation of this utility model liquid drop sensor;

Accompanying drawing 3 is this utility model discharger circuit diagram;

Accompanying drawing 4 is this utility model receiving system circuit diagram;

Accompanying drawing 5 is this utility model block diagram measuring period;

Accompanying drawing 6 is this utility model period measurement and display circuit figure.

This utility model is specifically described by embodiment below in conjunction with accompanying drawing:

This utility model utilizes photoelectric technology, electronic technology the drop interval to be shown, and send alarm signal when transfusion closes to an end.In accompanying drawing 1, liquid drop sensor is made up of RF transmitter, infrared receiver, and part 1 is a RF transmitter, disturbs for avoiding external light source, and it is the RF transmitter of 38KHz that emission light source device adopts carrier frequency, and physical circuit figure as shown in Figure 3.Part 2 is receiving systems, front end adopts infrared receiver and infrared ray amplifier, when drop drips when passing the light that emitter sends, the light signal power that receptor is received changes, receptor is converted to the signal of telecommunication with the light signal that changes, amplification integeral type circuit changes this signal amplification frequency-selecting, detection, integer into pulse signal, in the blanking time that demonstrates circuit demonstration drop respectively through the measure of time of part 3, signal discrimination circuit judges whether pulse finishes, thereby the alarm signal of sending, physical circuit figure is shown in accompanying drawing 4, accompanying drawing 6.

This utility model working method is as follows: place in the middle of the dropping funnel of existing intravenous transfusion device is near, be provided with liquid drop sensor, and as accompanying drawing 2, it is made up of RF transmitter, infrared receiver; Send carrier frequency 38KHz infrared pulse signal as the RF transmitter in the accompanying drawing 3, shine on the infrared receiver on the infrared detector.When drop passes the light that RF transmitter sends, the light intensity that infrared receiver is received changes, infrared receiver is converted into this variation the modulating pulse signal of telecommunication that equates with the drop time cycle, this signal delivers to that frequency selection circuit amplifies by amplifying, the pulse signal of frequency-selecting (38KHz carrier frequency pulse signal), detection output drop, again by the pulse shaping circuit with drop pulse signal integer, time-delay.This signal divides two-way again, one the tunnel delivers to timer, display, demonstrate the time cycle (pulse signal) of drop, the continuous decision circuitry of pulse is delivered on another road, this circuit is made up of rectification circuit, voltage comparator circuit, it converts the drop pulse signal to DC level, when pulse signal, high level is kept in rectification circuit output, the comparison circuit output low level, when having two pulses not receive continuously, the rectification circuit output low level, comparison circuit output high level triggers warning circuit, and the siren energized gives the alarm.(siren can adopt KD-9561, KD-9300 serial special ICs; Also can make dedicated voice transfusion warning integrated circuit).Specifically receiving circuit as shown in Figure 3: the circuit working principle is, when drop passes light, changed the power that RF transmitter D1 injects infrared receiver light, thereby the electric current of T1 infrared receiver is changed, this changes the amplification frequency selection circuit of forming via U1 38KHz carrier frequency pulse signal is amplified, frequency-selecting, detection, make it become the electric impulse signal identical by U2 integer and lengthened pulse width again with the drop interval, the corresponding drop cycle of each pulse, pulse signal one tunnel is through the unlatching of gating circuit by-pass valve control, the unit clock signal under the control of valve, send into count display, as the T that satisfies condition _xT _bThe time, in period T _xInterior result to the clock signal counting is: $N=\frac{T_x}{T_b}$

This result is exactly the time cycle of drop.Measuring Time cycle functional-block diagram and circuit theory are shown in accompanying drawing 5 and accompanying drawing 6.Another road pulse signal is delivered to by U ₃, U ₄The pulse decision circuitry of forming, wherein U ₃Form half-wave rectifying circuit and U ₄The voltage comparator of forming.When the pulse signal consecutive hours, full-wave rectifying circuit output high level, the voltage comparator output low level, alarm is lockable and does not work, when not having two pulse signals continuously, voltage comparator output high level triggers alarm and makes it send alarm sound, the reminds people transfusion finishes, and pulls out infusion needle.

Claims (2)

1, a kind of automatic display alarm for intravenous infusion is characterized in that: place in the middle of the dropping funnel of intravenous transfusion device is near, be provided with liquid drop sensor, and it is made up of RF transmitter and infrared receiver; An amplification integeral type circuit is connected with liquid drop sensor, and what be connected with the outfan of amplification integeral type circuit has two branch roads, and one is the measure of time display circuit, and one is warning circuit.

2, automatic display alarm for intravenous infusion according to claim 1 is characterized in that: it is 38KHz that the RF transmitter in the liquid drop sensor adopts carrier frequency.

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