Micro motor infusion pump
Technical field:
The present invention relates to a kind of micro motor infusion pump technology.
Background technology:
Intravenous transfusion is a kind of the most frequently used clinical treatment method.For wound such as gunshot wound, puncture wound, burn and lose blood, the dehydration property shock patient, the controlled rapid fluid replacement of pre hospital care is a very important emergency measures.At present, owing to be subjected to the restriction of various technical conditions, the controlled quick infusion device that is suitable for pre hospital care, battlefield use but is a difficult problem always, so far there is not this series products equipment medical emergency unit inside and outside the army, cause uncontrollable liquid fast infusion, be forced to end the wounded are carried out liquid infusion, be difficult to launch anti-ly lose blood, the treatment of dehydration property shock.Though treatment has controlled accurate various infusion pump in the institute, because of its volume, weight, power consumption are big, the continuous liquid infusion needs Alternating Current Power Supply, can't use in pre hospital care, battlefield.And existing pressurizing infusion set, portable infusion device,, technological deficiency simple in structure, operation inconvenience because of it, the volume power consumption is big, lack warning function, change problem such as liquid delay treatment, also can't satisfy pre hospital care fully, the battlefield is used.Therefore, how to realize that pre hospital care, field, battlefield rapid fluid replacement are the focuses of military medicine, emergency medicine research, the quick infusion pump of development pre hospital care portable intelligent micro machine has the meaning of particular importance.
Summary of the invention:
Problem in view of above-mentioned existence, the present invention proposes a kind of micro motor infusion pump, it integrates check valve double pump pipe, air elimination diaphragm technology and impedance transducer, the employing micro machine drives, functions such as automatic fitration that realization micro power, low-power consumption and bubble block and output alarm model, can reach be convenient for carrying, fast blood transfusion and infusion and omnidistance observing and controlling, the IV blood transfusion and infusion of accurate, safe and reliable conformance with standard regulation is provided for pre hospital care, field, battlefield treatment.
In order to realize the foregoing invention purpose, the present invention by the following technical solutions:
A kind of micro motor infusion pump, it comprises infusion board assembly and motor driver:
Described infusion board assembly is integrated on the blood transfusion and infusion substrate by check valve, elastic pump tubes, air elimination diaphragm and impedance probe and constitutes;
There is liquid inlet channel and the tapping channel that is parallel to each other at the two ends of described blood transfusion and infusion substrate, and the inlet that connects the blood transfusion and infusion bag is arranged on the described liquid inlet channel, and tapping channel is communicated with the liquid inlet channel of air elimination diaphragm;
The two ends of described liquid inlet channel and tapping channel are connected two parallel pump tubes by pump pipe union respectively, and check valve is set in pump pipe union respectively, and all check valves are all towards the unidirectional unlatching of fluid direction; Described blood transfusion and infusion substrate adopts the PMMA material, and pump line, check valve adopt APSPG silica gel.
Described air elimination diaphragm is integrated on the blood transfusion and infusion substrate, it is surrounded up and down by diaphragm upper body and diaphragm lower body and forms a cavity body structure, the diaphragm lower body can directly adopt the blood transfusion and infusion substrate, both form at bonding and laser weld, and the hydrophilic air barrier sheet is set in the middle of the cavity cavity is divided into two chambeies up and down, be formed with miniature triangular form groove on the last cavity wall, form the capillary tube air and eliminate array liquid road, be provided with the diaphragm-operated hole of cooling down of band aerofluxus in the bottom of cavity of resorption.Described feed pathway inserts from cavity of resorption, and tapping channel is picked out by epicoele.
Two impedance detecting electrodes of described impedance probe are arranged on the liquid outlet place.
Described micro machine driving device has deceleration micro machine, swing extrusion head, capacity eccentric bearing, circuit board and supply unit, and they are installed in the housing that is made of casing and fixing head.
Described fixing head is fixed on the casing, clamps the infusion board assembly on fixing head; The corresponding position of impedance detecting electrode is being set is being provided with conductive pole on the fixing head with on the infusion board assembly, between impedance detecting electrode and circuit board, realizing being electrically connected.
Described deceleration micro machine connects capacity eccentric bearing by motor shaft, and the end of motor shaft is installed in the bearing block by bearing; Described casing is provided with the speed change knob, is electrically connected with circuit board, and circuit board connects the deceleration micro machine by control signal wire.
Described swing extrusion head bottom is contained on the capacity eccentric bearing, swing with capacity eccentric bearing, the extrusion head on the top of swing extrusion head is the T type, protrude upward in fixing head, and be contained in the intermediary gathering sill of fixing head, gathering sill upper fixed location-plate positions the upper-lower position of T type extrusion head, and the two ends of T type extrusion head are the elastic pump tubes sidewall on the infusion board assembly respectively, and alternately stretches out gathering sill extruding elastic pump tubes when the swing of swing extrusion head.
Micro motor infusion pump of the present invention is by the work of control circuit control micro machine, realizes swinging of swing extrusion head, and the extruding pump line is realized the unidirectional output of liquid, and it has following significant advantage:
1, adopts PMMA material substrate, have certain transparency and biocompatibility, separate two chambeies up and down with the hydrophilic air barrier sheet, can cut off air can make liquid overflow again, on the capillary tube air elimination array liquid road that adds that epicoele forms, cavity of resorption distribute two through the aerofluxus of special handling but and without leakage two holes of cooling down, realize effective elimination thus to liquid hollow gas.
2, adopt check valve double pump structure, the blood transfusion and infusion substrate of PMMA material and pump line, the check valve of APSPG silica gel, they have fabulous elasticity and good memory function, and check valve has the elastic deformation characteristic, draws in installing hole, and is fixing voluntarily after the relieving.Pump line drives the check valve switch freely, just like Cardiac valve prosthesis under the alternately extruding of extrusion head.
3, this pump is fixed in liquid outlet with impedance detecting electrode, infusion whole process is carried out bubble, blocked monitoring, realization is to the bubble detection alarm of infusion liquid, make that output liquid can safe infusion, it is advanced more practical to utilize than traditional infusion pump that sonac detects bubble, pressure transducer detects the technology of stopping up.
4, the micro machine drive member has many retaining speed-regulating functions, the infusion of suitable different flow.Blood transfusion and infusion bottle (bag) can place any position with respect to human body such as stretcher, bed, even can put the following proper site of stretcher.
In sum, utilization of the present invention integrates the infusion board of check valve double pump pipe, air elimination diaphragm and impedance transducer and filters bubble, has the function of getting rid of the contained gas of liquid in infusion pump or the liquid transmission pipeline, and can realize the volume of air overload alarm, block to report to the police to have the advantage that micro power, low-power consumption, volume are little, be convenient for carrying.
Description of drawings:
Fig. 1 is an overall structure sketch map of the present invention.
Fig. 2 is the structural representation of micro machine of the present invention and swing extrusion head.
Fig. 3 is the pump housing and the air elimination diaphragm structural representation of infusion board of the present invention.
Fig. 4 is the structural representation of air elimination diaphragm of the present invention and impedance exploring electrode.
Fig. 5 is the A-A profile of Fig. 4.
Fig. 6 is liquid Lu Yuanlu figure of the present invention.
The specific embodiment:
Further specify structure of the present invention and operation principle below in conjunction with accompanying drawing:
Referring to Fig. 1, this micro motor infusion pump comprises the infusion board assembly 4 of top and the micro machine driving device of below.
In conjunction with referring to Fig. 3, infusion board assembly 4 is integrated on the blood transfusion and infusion substrate 41 by four check valves, two elastic pump tubes, air elimination diaphragm 45 and impedance probe and constitutes.Blood transfusion and infusion substrate 41 adopts medical lucite press mold to make, and the liquid inlet channel 47 and the tapping channel 49 that are parallel to each other are arranged at its two ends, and the inlet 48 that connects the blood transfusion and infusion bag is arranged on the liquid inlet channel 47, and tapping channel 49 is communicated with the liquid inlet channel 454 of air elimination diaphragm 45.Two ends at liquid inlet channel 47 and tapping channel 49 are connected the first parallel pump line 44A and the second pump line 44B by pump pipe union 43 respectively, and the first check valve 42A, the second check valve 42B, the 3rd check valve 42C and the 4th check valve 42D are set in pump pipe union 43 respectively, all check valves are all towards the unidirectional unlatching of fluid direction.Blood transfusion and infusion substrate 41 adopts the PMMA material, and pump line, check valve adopt APSPG silica gel.
Referring to Fig. 4 and Fig. 5, air elimination diaphragm 45 is integrated on the blood transfusion and infusion substrate 41, with blood transfusion and infusion substrate 41 as diaphragm lower body 455, another piece PMMA plate is adopted in diaphragm upper body 451, both are connected into a cavity at bonding and Laser Welding, and hydrophilic air barrier sheet 452 is set in the centre, cavity is divided into two chambeies up and down, be provided with the hole 456 of cooling down of band aerofluxus diaphragm 453 in the bottom of cavity of resorption, on the epicoele wall, be formed with simultaneously miniature triangular form groove 459, form the capillary tube air and eliminate array liquid road.Liquid inlet channel 454 inserts from cavity of resorption, and liquid outlet 46 is picked out by epicoele.First and second impedance detecting electrodes 457 and 458 of impedance probe are arranged on liquid outlet 46 places.
In conjunction with referring to Fig. 1, Fig. 2 and Fig. 3, the micro machine driving device has deceleration micro machine 16, swing extrusion head 7, capacity eccentric bearing 9, circuit board 11 and supply unit etc.They are installed in the housing that is made of casing 1 and fixing head 2.
Fixing head 2 is fixed on the casing 1, clamps infusion board assembly 4 by lock 3 on fixing head 2.First and second impedance detecting electrodes 457 are being set and 458 corresponding positions are provided with conductive pole 18 on the fixing head 2 with on the infusion board assembly 4, realize being electrically connected between first and second impedance detecting electrodes 457,458 and circuit board 11 by conductive pole 18, conductive pole 18 is installed on the fixing head 2 by elastic rubber fitting 17.
Deceleration micro machine 16 connects capacity eccentric bearing 9 by axle 8, and the end of reducing motor axle 8 is installed in the bearing block 19 by bearing 20.Casing 1 is provided with speed change knob 15, is electrically connected with circuit board 11, and circuit board 11 connects deceleration micro machine 16 by control signal wire, and motor is carried out speed Control.
Swing extrusion head 7 bottoms are that the U type is forked, fork is on capacity eccentric bearing 9, rotation with capacity eccentric bearing 9 swings, the extrusion head on swing extrusion head 7 tops is the T type, protrude upward in fixing head 2, and be contained in the fixing head 2 intermediary gathering sills 5, the upper-lower position of 6 pairs of T types of gathering sill 5 upper fixed location-plates extrusion head positions, the two ends of T type extrusion head are first and two pump line 44A on the infusion board assembly 4 and the sidewall of 44B respectively, and alternately stretches out gathering sill 5 and remove to push the first pump line 44A or the second pump line 44B when 7 swings of swing extrusion head.
This infusion pump is provided with two kinds of power mode, and a kind of is to connect civil power by the low-voltage power supply socket 10 that is arranged on casing 1 outside, and another kind is by being arranged on battery 14 and the battery case 13 in the casing 1 bottom lower casing 12, battery 13 power supplies being arranged.
The occupation mode of this infusion pump is referring to Fig. 6:
Before blood transfusion and infusion, blood transfusion and infusion bag 21 or bottle are connected with the inlet 48 of infusion board assembly 4 by blood transfusion and infusion pipe 22, liquid outlet on the air elimination diaphragm 45 46 is connected with the blood transfusion and infusion pin by standard Luser adapter 23, extruding blood transfusion and infusion bag 21, the first check valve 42A, the second check valve 42B, the 3rd check valve 42C and the 4th check valve 42D are opened, and the whole pipe flow path system is full of infusion liquid.
When deceleration micro machine 16 drove swing extrusion head 7 elasticity of compression pump line 44A, the first check valve 42A opened, and second to the four check valve 42B, 42C and 42D close, and the flow of liquid that is full of the first pump line 44A is output after air elimination diaphragm 45; Otherwise when deceleration micro machine 16 drove the swing extrusion head 7 compressions second pump line 44B, the 4th check valve 42D opened, and first to the three check valve 42A, 42B, 42C close, and the flow of liquid that is full of the second pump line 44B is output after air elimination diaphragm 46.Swing extrusion head 7 swing alternate compression first and two pump line 44A and 44B will form the liquid infusion continuously with certain pressure at standard Luser adapter 23 delivery outlets like this and give patient, are similar to the continuous operation principle of atrial ventricle.The flap of check valve can stop anti-stream.
In infusion process, when impedance probe has detected bubble, obstruction generation, signal will be transferred to circuit board 11, circuit board 11 is promptly controlled reducing motor and is quit work immediately, and system also can send sound and light alarm.
Bubble diaphragm filtering technique is that this installs one of classic characteristics, works as the blood transfusion and infusion bag and drop to the ground in first aid, or occur flowing backwards, and a large amount of air can enter pipeline.But this diaphragm has been arranged, just this situation can not occur.Even if there are some air can be excluded, can not enter into the pipeline of patient's one side at all yet.Simultaneously impedance probe is provided with diaphragm-operated liquid outlet place, promptly in the patient-side pipeline, to meet the standard of zero tolerance.