CN1344569A

CN1344569A - Intelligent gastric lavager

Info

Publication number: CN1344569A
Application number: CN 01137227
Authority: CN
Inventors: 楼正家; 楼正国; 洪明; 沈晓淘
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-10-23
Filing date: 2001-10-23
Publication date: 2002-04-17
Anticipated expiration: 2021-10-23
Also published as: CN1156310C

Abstract

The intelligent gastric lavager is provided with one constant flow pump for driving liquid, one PC controlled motor for driving the pump, one two-cavity gastric laving pipe with pH sensor at its end and pressure sensor on the end of pipe, both of the sensor is connected to the PC via interface circuits, there is one circular air bag outside the wall of the gastric laving pipe and the bag is connected via one fine pipe to an air pump or air source. Compared with available technology, the present invention has high automation degree, high safety and reliability, compact and reasonable integral structure, small volume and convenient operation.

Description

Intelligent gastric lavager

Technical field

What the present invention relates to is a kind of various patients to be carried out the machine that gastric lavage is used, and belongs to the medical device class.

Prior art

Paunch flusher is a rescue instrument commonly used clinically, particularly eats by mistake or early stage rescue of patients such as reversal medicine, alimentary toxicosis plays crucial effects various, thereby clinically the performance and the gastric lavage effect of paunch flusher is had very high requirement.There are tens of families in the producer of domestic production paunch flusher at present, the paunch flusher structure that they produced mainly includes centrifugal pump, single hose gastrolavage tube etc., utilize centrifugal pump to produce positive/negative pressure and drive liquid, the actual use finds that this paunch flusher often causes the flow rate of liquid inequality, pressure is difficult to keep, Pressure gauge is selected the spring Pressure gauge for use, reading is incorrect, do not have that automatic detection device etc. is normal makes troubles for clinical use, even also can perhaps cause gastric mucosa injury hemorrhage too greatly because of uneven the backflowing of liquid turnover causes patient to suffocate into trachea because of negative pressure.In addition, patient often is difficult to cooperate during gastric lavage, causes gastrolavage tube to insert difficulty, and regular meeting occurs mispluging into situations such as tracheas and takes place, if find untimelyly, deals with improperly, and patient just might cause death, and serious malpractice takes place.

Summary of the invention

The present invention aims to provide a kind of intelligentized paunch flusher, to overcome the deficiencies in the prior art, it is to select for use constant flow pump as the pump that drives liquid, this constant flow pump is driven by the buncher that is subjected to the PC regulation and control, utilize adjustment constant flow pump different rotating speeds to come the flow velocity and the flow of controlling liquid, improved the drawback that in the past drives liquid with gas pressure, two airtight liquid containing bottles of original needs have also been discarded simultaneously, significantly reduced the volume of complete machine, by automatically control or human computer conversation's regulation and control of PC, not only reliably but also rapid; Adopt the gastrolavage tube of double lumen tube, interior tube chamber is a drain pipe, its rearward end is connected to the soiling solution jar by a tube for transfusion, outer lumen is a feed tube, its rearward end is connected to the washing liquid jar by another tube for transfusion, offer aperture on its leading portion tube wall, adopt double-cavity stomach tube, the dirt after will washing when coat of the stomach is sprayed washing excretes from drain pipe.

Described drain pipe grows feed tube slightly, offers oval aperture on the tube wall of this that grows section drain pipe, and it can significantly reduce the obstruction of dirt than circular open; Tube end at drain pipe is provided with the pH value pick off, can instruct the insertion of gastrolavage tube by the variation of this pH value numerical value; In addition on two tube for transfusions, pressure transducer is housed respectively, and pressure transducer and pH value pick off join by interface circuit and PC all.

For double-cavity gastric lavage tube is fixed after inserting gastric, avoid gastrolavage tube after inserting patient's gastric, to skid off, the outer tube wall of the present invention's double-cavity gastric lavage tube is provided with annular air-pocket, and this air bag links to each other with small air pump or pressure gas source by a tubule.

Described PC mainly is made of AT59C51 integrated chip and 6264, AT28C64 storage chip, this PC is connected with keyboard with touch screen by the I/O interface circuit, each parameter of complete machine is controlled with PC, pass through touch panel, make human computer conversation's direct convenience, can in rescue, race against time for medical personnel.

The present invention compared with prior art has the automaticity height, and security reliability is good, compact overall structure, rationally, characteristics such as volume reduces, and is easy for operation.

Description of drawings

Fig. 1 is the structural representation of the constant flow pump selected for use of the present invention.

Fig. 2 is a speed-regulating control circuit schematic diagram of the present invention.

Fig. 3 is the structural representation of double-cavity gastric lavage tube of the present invention.

Fig. 4 is the schematic diagram of pressure sensor circuit of the present invention.

Fig. 5 is a PC control circuit schematic diagram of the present invention.

The specific embodiment

The present invention will be described in detail below in conjunction with accompanying drawing: the present invention mainly includes PC, constant flow pump and gastrolavage tube etc.Shown in Figure 1, constant flow pump can be selected the commercially available two-way pump that positive/negative pressure can be provided for use, and it includes the main shaft 1 that links to each other with buncher, the limit of main shaft 1 is provided with roller 2, be provided with briquetting 3 above main shaft 1, be gripped with elastic hose 4 in the middle of it, main shaft 1 drives roller 2, thereby roller 2 rotates extruding elastic hose 4 and produces positive/negative pressure, in flexible pipe 4 liquid is arranged, roller is when clockwise rotating, and it pushes liquid to the right and produces malleation, and the left side forms vacuum, produces negative pressure.The flow of above-mentioned constant flow pump is determined by the rotating speed of pump and the internal diameter size of tube for transfusion.Under the situation that tube for transfusion is determined, the rotating speed of flow and pump is approximated to proportional relation, just can calculate instantaneous velocity and total flow by PC.Constant flow pump reaches the purpose of regulating rotating speed, just aforesaid buncher by step motor drive by the umber of pulse of regulating the step motor control winding.

Figure 2 shows that the schematic diagram of speed-regulating control circuit, it adopts the CC7555 module, and this module energising back just produces the electric pulse of certain frequency automatically, by changing the value of resistance R a and Rb, just can change the frequency of electric pulse.Motor is received an electric pulse, and rotor just turns over certain angle, and the unit interval umber of pulse is many more, and revolution speed is fast more, after pulse produces, again by pulse distribution and drive circuit, with regard to the rotating speed of energy control pump.

Figure 3 shows that the structural representation of double-cavity gastric lavage tube.Tube chamber is a drain pipe 5 in it, and its rearward end is connected to the soiling solution jar by a tube for transfusion 6, and outer lumen is a feed tube 7, is connected to the washing liquid jar by another tube for transfusion 8 behind its rearward end bifurcated, offers aperture 9 on its leading portion tube wall.Described drain pipe 5 grows feed tube 7 slightly, offers oval aperture 10 on the tube wall of this section drain pipe that grows, and is provided with pH value pick off 11 at its tube end; On two tube for transfusions pressure transducer 12 is housed respectively in addition, pressure transducer 12 and pH value pick off 11 join by interface circuit and PC respectively.Above-mentioned double-cavity gastric lavage tube, after its head is loaded onto the pH value pick off, can instruct the correct insertion of gastrolavage tube, liquid of gastric lavage flows into by the exocoel of double-cavity gastric lavage tube, after arriving stomach, be sprayed onto gastric by aperture, the drain pipe leading portion of inner chamber has special oval aperture, can the dirt sucking-off is external, can improve the situation that the gastric dirt stops up the mouth of pipe easily significantly.In addition for double-cavity gastric lavage tube is fixed after inserting gastric, avoid gastrolavage tube after inserting patient's gastric, to skid off, the outer tube wall of the present invention's double-cavity gastric lavage tube is provided with annular air-pocket 13, and this air bag links to each other with small air pump or pressure gas source by a tubule 14.

Fig. 4 is the interface circuit schematic diagram of pressure transducer, it mainly comprises circuit compositions such as signal amplification, correction and temperature-compensating, this circuit is by four amplifier OP1---and OP4, three diodes, two potentiometers and several resistance are formed, wherein pressure transducer is selected FPM05G for use, constitute constant-current source circuit by amplifier OP1, diode D1, audion Tr1, resistance R 1, be used to drive whole module.Amplifier OP2 amplifies 10 times with pick off output.Amplifier OP3 adjusts level effect and output in addition except that continuing the signal amplification.And amplifier OP4 exports the voltage through adjusting, and adjusts the voltage with negative temperature coefficient by potentiometer VR2.

Fig. 5 is the schematic diagram of PC control circuit of the present invention.PC of the present invention mainly is made of AT59C5 1 integrated chip U1 and 6264 storage chip U3, AT28C64 storage chip U7.The pressure signal that ADC0809 chip U4 measures pressure transducer is gathered, is changed, and passes in the system of PC, by PC by setting value relatively, judges.DAC0832 chip U5 controls the rotating speed of constant flow pump buncher with the instruction output of PC, thereby realizes parameters such as turnover gastric pressure, flow are implemented monitoring, adjustment.8155 chip U8 are I/O extended interface circuit, and it connects keyboard with touch screen, make things convenient for the daily use of staff.The signal that blockage signal from sensor represents this foot input among the figure is by the pressure transducer place, and it is connected to the IN-O foot of U4; Blockage to drive motor representation signal exports constant flow pump to, is used for controlling the rotating speed of buncher.Also have 74LS373 chip U2 and 74LS138 chip U6 among the figure.The PD0 of U1---PD7 foot, the D0 of U2---D7 foot, the D0 of U3---D7 foot, the 2-1 to 2-8 of U4, the D10 of U5---D17 foot, the D0 of U7---D7 foot, the AD0 of U8---AD7 foot links to each other by DATA BUS data wire; The P20 of U1---P27 foot, the Q0 of U2---Q7 foot, the A0 of U3---A12 foot, the ADD-A of U4, ADD-B, ADD-C foot, the A of U6, B, C foot link to each other by ADDRESS BUS address wire; Connect crystal oscillating circuit between the X1 of U1, the X2 foot, the REF (+) of U4 connects 6 feet of amplifier, and reference voltage is provided, REF (-) ground connection; The IOUT1 of U5 links to each other its XFER and WR2 ground connection with 2,3 feet of LM358 respectively with IOUT2; The TMIN of U8 links to each other with RESET, ground connection, and is quite universal and ripe because of the technology of PC, do not do more detailed introduction at this.

Work process of the present invention is: after the energized, open the paunch flusher power supply earlier, power supply indicator is bright, enters original state, has automatic gastric lavage and artificial gastric lavage dual mode to select for medical personnel.If press " automatically " gastric lavage button, PC provides the interior positive/negative pressure commonly used that is provided with of machine, flow velocity, flow automatically, needs with numerical value such as total amounts, gastrolavage tube is inserted patient's gastric, if pH value sensor value＜5 that PC is received illustrate that stomach tube has inserted gastric; If pH value＞6, then stomach tube can not wash not at gastric.When definite gastrolavage tube has entered gastric, press the gastric lavage key, begin automatic gastric lavage.This moment, constant flow pump started 5 seconds earlier, so that with the dirt sucking-off, sent into cleaning mixture, sucking-off dirt liquid then; The automatic monitoring pressure of PC, feed liquor amount, liquid outlet quantity, flow velocity, flow, gastric PH equivalence in the washing process, when detecting positive/negative pressure and total turnover amount difference and surpassed the ultimate value of setting in the machine, will sound and light alarm, stop gastric lavage after 5 seconds automatically; Judging reason when PC according to pressure, flow velocity, flow etc. is that dirt stops up, and can recoil for 5 seconds by automatic control system, to go out tamper, then continues gastric lavage again, washes autostop until scheduled volume.Do not go out tamper yet twice if recoil continuously then stop gastric lavage automatically, and sound and light alarm.As press " manually " gastric lavage key, medical personnel can be according to patient's practical situation, sets the positive negative pressure, flow of gastric lavage, always needs liquid measure etc. (within the specific limits), with the step of top automatic gastric lavage by touch screen, insert gastrolavage tube, when gastric lavage had just begun, selected certain negative pressure was pressed " clearing stomach " and is turned round, the venom of gastric is extracted out, and then the adjusting malleation, make the turnover liquid measure in a basic balance according to changes in flow rate, reach stable status; Can monitor surplus of malleation, negative pressure, feed liquor speed, fluid speed, total input, total make, preset value or the like by display screen gastric lavage manipulate person, keep a close eye on patient; When dirt was blocked the gastrolavage tube outlet, changing can appear in negative pressure and liquid outlet quantity, and can press the recoil key this moment, can continue gastric lavage by the gastric lavage key again behind the dirt removal, finishes disable motor until gastric lavage.

Claims

1, a kind of intelligent gastric lavager, it includes pump and gastrolavage tube, it is characterized in that selecting for use constant flow pump as the pump that drives liquid, it is driven by the buncher that is subjected to the PC regulation and control, and gastrolavage tube is a double lumen tube, and interior tube chamber is drain pipe (5), its rearward end is connected to the soiling solution jar by a tube for transfusion (6), outer lumen is feed tube (7), and its rearward end is connected to the washing liquid jar by another tube for transfusion (8), offers aperture (9) on its leading portion tube wall.

2, intelligent gastric lavager according to claim 1, the drain pipe (5) that it is characterized in that described double-cavity gastric lavage tube grows feed tube (7) slightly, offer oval aperture (10) on the tube wall of this that grows section drain pipe, tube end is provided with pH value pick off (11), pressure transducer (12) is housed respectively, and pressure transducer and pH value pick off join by interface circuit and PC all on two tube for transfusions.

3, intelligent gastric lavager according to claim 1 and 2 is characterized in that the outer tube wall of described double-cavity gastric lavage tube is provided with annular air-pocket (13), and this air bag links to each other with small air pump or pressure gas source by a tubule (14).

4, intelligent gastric lavager according to claim 1 and 2 is characterized in that described PC mainly is made of AT59C51 integrated chip and 6264, AT28C64 storage chip, and this PC is connected with keyboard with touch screen by the I/O interface circuit.