CN2202537Y

CN2202537Y - Monitor for safety transfusion

Info

Publication number: CN2202537Y
Application number: CN 94218276
Authority: CN
Inventors: 彭敢
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-08-11
Filing date: 1994-08-11
Publication date: 1995-07-05
Anticipated expiration: 2004-08-11

Abstract

The utility model relates to a medical monitor for safety transfusion, which is composed of an infrared photoelectric sensor which is used for detecting dropping signals, a processing circuit which completes the photoimpact detection, magnification and shaping into regular drop signals, a counting circuit for dropping signals, a decoding circuit which can preset certain volume of transfusion drop, a timing delay circuit for dropping signals, and an alarm circuit. When a calculating circuit completes the counting of the preset drop number, a decoder outputs a liquid exchange signal to drive an alarm; when the delay time is over without a dropping signal, the output is blocked, or an evacuation signal is driven to send out an alarm. The utility model with advantages of simple structure, convenient operation, visual display, etc., is convenient for centralized monitoring and management.

Description

Monitor for safety transfusion

This utility model relates to a kind of alarm device, relates to a kind of medical infusion safety custody device or rather.

Transfusion is the treatment means of generally using in the hospital, for preventing to cause malpractice because of phenomenons such as emptying or obstruction take place, needs patient or accompany personnel to guard during transfusion, so that in time notify the nurse to handle problems, avoids causing danger.

The transfusion of one bottle of 500ml has 7500, and the transfusion of 250ml has 3750, thus monitoring time of expending of transfusion be quite long, had a strong impact on patient's rest, consumed accompany personnel energy, increased nurse's working strength.

The purpose of this utility model is a kind of Inflarm of design, in a single day emptying or blockage problem appear in conventional infusion process, can in time remind patient, accompany personnel or nurse to handle problems, minimum level is reduced in danger, nurse or accompany personnel are freed from uninteresting nurse work.

Inflarm of the present utility model, utilize a transfusion capacity and a number that this principle of fixed correspondence is arranged, be 15 of every milliliter of transfusions, by monitoring actual drop and counting, infuse due numeric ratio with the respective volume that presets again, and the prompting transfusion dripped off and need change the liquid processing when both were consistent; Enough at actual droplet counting value meter, but then represent to stop up when not having the dropping liquid count signal within a certain period of time, all can start warning circuit and report to the police, remind the nurse to change liquid or handle and stop up.If each monitor dropping liquid count signal, alarm signal are sent in nurse's platform concentrated safe infusion monitor system in wired or wireless mode, nurse's platform main frame can monitor the situation of each transfusion patient, at any time understand each patient's infusion rate and whether report to the police etc., so that in time dispose, increase work efficiency.

Inflarm of the present utility model, by the liquid drop sensor of holding in the middle part of a kettle, the monitor main frame of holding on infusion support, the line between pick off and main frame constitutes, and it is characterized in that:

Described monitor main frame comprises the signal processing circuit of the drop signal of telecommunication of sensor being carried out detection, amplifies and is shaped as regular drop signal, the enumerator and the timing delay circuit that are connected with signal processing circuit output, the decoder that is connected with enumerator output is with the warning circuit that is connected with decoder output and timing delay circuit output.

Described liquid drop sensor is an infrared optic-electric detects technique.

Described signal processing circuit is by the detection rectification circuit of photoimpact, the low-frequency amplifier circuit of drop signal, the drop signal is organized into the bidirectional pulse shaping circuit of regular positive pulse and the single-shot trigger circuit that the drop signal processing is become the negative pulse corresponding with the actual drop formation that is linked in sequence.

Described warning circuit comprises first agitator that connects timing delay circuit output, second agitator that connects decoder output, the NAND gate of carrying out with logical combination is exported in the output of first agitator and second agitator, the 3rd agitator that is connected with NAND gate output, with export with the 3rd agitator be connected, transistor circuit that load connects speaker.

Also comprise be connected between signal processing circuit and warning circuit, control is sent and the dropping liquid drippage has synchronous acoustic audio oscillator.

Further specify technology of the present utility model below in conjunction with embodiment and accompanying drawing.

Fig. 1, Inflarm liquid drop sensor structural representation

Fig. 2, the Inflarm scheme of installation

Fig. 3, the Inflarm theory diagram

Fig. 4, the Inflarm electrical schematic diagram

Referring to Fig. 1,1 for detecting the infrared optic-electric detects technique of drop, adopt commercially available MOCH25 type finished product, the ABS plastic piece of bonding and the same material of photoelectric sensor comprises rectangular block 11 and arc piece 12, makes it holding easily and is dripping on the kettle, and can rotate to an angle in the horizontal direction, with specification, the change in size that adapts to disposable transfusion device, utilize identical operation principle, also can adopt micro-pressure sensor to detect drop.

Referring to Fig. 2, Inflarm main frame 2 is by the column middle part appropriate position of the resilient steel clip subcard on the shell at infusion support, the plastic flexible pipe that photoelectric sensor 1 is stuck in disposable transfusion device 3 drips on the kettle, apart from about the about 10mm of drip, main frame 2 has three core flexible circuit conductors 4 to be connected by stereo plug 42 with 1 of pick off.

Referring to Fig. 3, Inflarm comprises the infrared optic-electric detects technique 1 that detects drop, the detection of drop signal, amplification, shaping treatment circuit 21, the enumerator 22 that the drop signal is counted, the decoder 23 that the dropping liquid number of constant volume transfusion is preset, no dropping liquid signal promptly starts the timing delay circuit 24 and warning circuit 25 compositions of work in the certain hour, 26 is audio oscillator among the figure, be subjected to drop signal processing circuit 21 control, warning circuit 25 sent have the sound that drips with actual drop synchronous effect.

When the droplet counting value that detects is consistent with the number of drops that presets is decoder 23 when signal output is arranged, and warning circuit 25 sends and changes liquid prompting warning; When normal monitoring, dripless signal in predetermined timing, timing delay circuit 24 control warning circuits 25 send obstruction or the top emptying is reported to the police.

Referring to Fig. 4, infrared optic-electric detects technique 1 and plug 42 are by schmitt inverter S1-S6, R1-R3, C1, D1 constitutes square-wave pulse generator, the embodiment frequency of oscillation is selected 10KHz, and the infrared light emission pipe is adopted pulse excitation, helps improving the light interference performance of power-efficient and anti-environment.

Transport and placing device L1, R4-R9, C2-C4, D2, D3 constitute amplifier detection, rectification circuit, to change low frequency signal into by the dropping liquid photoelectric pulse signal of socket the 3rd foot input, when transfusion is dripped in the middle of pick off, received signal is modulated, forms the drop signal through detecting circuit and smoothed filter circuit.

Constitute the low-frequency amplifier circuit of drop signal by transport and placing device L2, R10-R13, C5-C7, the drop signal through amplifying reaches the amplitude near supply voltage.

Schmitt inverter S7, Schmidt's NAND gate M1, R14-R17, D4 form the bidirectional pulse shaping circuit, because the lensing at drop middle part can make signal increase, and the refraction scattering at dropping liquid edge etc. can make signal reduce, so the size of drop signal, shape are all very irregular, this signal has reached the amplitude near supply voltage after amplifying, export positive pulse through the bidirectional pulse shaping circuit by D4 again.

Schmitt inverter S8, R18, R19, C8 constitute single-shot trigger circuit, embodiment is adjusted into the monostable circuit of about 100ms, because the positive pulse of bidirectional pulse shaping circuit output may more than one in one, its follow-up monostable circuit is adjusted into a negative pulse about the 100ms corresponding, clean with drop with it.

Schmitt inverter S9, S11, D6, R20, R21, C9 constitute timing delay circuit, embodiment is chosen as 5 seconds regularly, when S8 output negative pulse, S11 is output as " 0 " attitude, when pipeline blockage or top emptying took place, after the 100ms negative pulse stopped 5 seconds, delay circuit started in 5 seconds, S11 is output as one state, lights LED.

14 digit counter IC and peripheral cell thereof constitute enumerator, and the 100ms negative pulse of S8 output is counted each drop through the clock end that Schmidt's NAND gate M4 adds to enumerator IC.

Because the capacity of packing transfusion is generally 500ml and 250ml, the 500ml transfusion has 7500, can be decided to be 6650 with changing liquid prompting value, surplus 56ml, and F1 translates by NAND gate; The 250ml transfusion has 3750, can be decided to be 3072 with changing liquid prompting value, surplus 45ml, and F2 translates by NAND gate.K2 is the amount of infusion selector switch, is used to select the decoding output signal of F1 or F2.When F1 or F2 are output as " 0 " attitude, block on the one hand Schmidt's NAND gate M4 and stop counting, will change the liquid cue alert circuit of delivering newspaper through schmitt inverter S17 on the other hand.When liquid prompting warning occurring changing, if continue transfusion, then can click SR REST, enumerator is counted again.Normal count status is indicated in the also driven for emitting lights diode (LED) light on and off action of Q1 end output signal of enumerator IC.

Schmitt inverter S12, R23, R25, C10 constitute first agitator, and it is 5HZ/S that embodiment selects frequency of oscillation.R24, R26, C11, schmitt inverter S13 constitutes second agitator, and it is 1-2HZ/S that embodiment selects frequency of oscillation.When occur to stop up or emptying promptly the S11 of 5 seconds delay circuits be output as one state, the vibration of first agitator; When decoder F1 or F2 have decoded signal output, when S17 is output as one state, the vibration of second agitator, the low frequency signal (or its superposed signal) of first or second agitator output is exported through Schmidt's NAND gate M3.Schmitt inverter S16, potentiometer W1, C13 constitute the 3rd agitator, are audio oscillator, and when M3 had low frequency signal output, the 3rd agitator was worked thereupon, drove speaker Y through transistor T and sent interrupted chimes of doom.When obstruction or top emptying take place, the first, the 3rd agitator work, warning circuit sends rapid alarm sound, when number of infusion drops reaches the count value of respective volume, second, third agitator work, warning circuit sends the liquid that changes of similar busy tone and points out chimes of doom.

Schmidt trigger S15, R27, C12 constitute the 4th agitator, be audio oscillator, on and off switch K1 is dialled when 3 the position, schmitt inverter S10 output 100ms positive pulse, the 4th agitator work, speaker Y is along with drop drippage sends the sound of " drip, drip ", and when on and off switch K1 pushed 1 or 2 position, the 4th agitator was not all worked.

Schmidt's NAND gate M2 is with the obstruction or the emptying signal of the 100ms undersuing of schmitt inverter S8 output and Schmidt's NAND gate M3 output and change nurse's platform main frame that the safety custody system is sent in liquid cue stack, for monitoring drop signal and alarm signal.

This utility model is realized the automatic monitoring of transfusion by detecting drop and counting, have the liquid that changes that can preset amount of infusion and point out functions such as warning, line clogging warning, top emptying warning, the alarm signal of each monitor can adopt multiplex techniques to send nurse's platform to concentrate monitoring in wired or wireless mode, as being time-devision system multichannel communication multiple telecommunication interface of each monitor design, just can realize the two-way communication between nurse's platform and monitor easily, carry out the safety custody management.

Claims

1, a kind of Inflarm, by the liquid drop sensor of holding in the middle part of a kettle, the monitor main frame of holding on infusion support, line between pick off and main frame constitutes, it is characterized in that: described monitor main frame comprises the signal processing circuit of the drop signal of telecommunication of sensor being carried out detection, amplifies and is shaped as regular drop signal, the enumerator and the timing delay circuit that are connected with signal processing circuit output, the decoder that is connected with enumerator output is with the warning circuit that is connected with decoder output and timing delay circuit output.

2, Inflarm according to claim 1 is characterized in that described liquid drop sensor is an infrared optic-electric detects technique.

3, Inflarm according to claim 1, it is characterized in that described signal processing circuit by the detection rectification circuit of photoimpact, the low-frequency amplifier circuit of drop signal, the drop signal is organized into the bidirectional pulse shaping circuit of regular positive pulse and the single-shot trigger circuit that the drop signal processing the is become the negative pulse corresponding formation that is linked in sequence with actual drop.

4, Inflarm according to claim 1, it is characterized in that described warning circuit comprises first agitator that connects timing delay circuit output, second agitator that connects decoder output, the NAND gate of carrying out with logical combination is exported in the output of first agitator and second agitator, the 3rd agitator that is connected with NAND gate output, with export with the 3rd agitator be connected, transistor circuit that load connects speaker.

5, Inflarm according to claim 1, it is characterized in that also comprising be connected between signal processing circuit and warning circuit, control is sent and the dropping liquid drippage has synchronous acoustic audio oscillator.