CN2197014Y

CN2197014Y - A wisdom meter of bleed fluid state

Info

Publication number: CN2197014Y
Application number: CN 93205312
Authority: CN
Inventors: 王立文
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-03-04
Filing date: 1993-03-04
Publication date: 1995-05-17
Anticipated expiration: 2003-03-04

Abstract

The utility model relates to an intelligent tester for bleed fluid, which adopts two sets of photoelectric switches as the starting and the stopping signals of a blood post. A computer can check the number of blood drop at a capillary outlet and the time interval, the blood flow speed in the capillary with different shear rates can be calculated, so a constitutive equation can be formed, and the consecutive change law of blood viscosity can be got. The utility model can be used as a computer aided diagnosis expert system with being matched with any apoplexy forecasting diagnostic software, so the utility model can compare and preserve medical histories and can be popularized for measuring the viscosity of other Newton or non-Newton fluid.

Description

A wisdom meter of bleed fluid state

This utility model relates to a kind of device that is used to measure blood or liquid viscosity, belongs to medical apparatus and instruments or liquid measure field.

At present, the instrument of measurement blood viscosity mainly contains two classes; Cone-plate formula and capillary type.The capillary type blood viscosity measuring instrument of using can be divided into two kinds now, photo-electric and electric pole type, photo-electric blood viscosity measuring instrument is a height (being generally three to five photoswitches) of being measured the blood post by photoswitch, can get three to five blood viscosity values under the shear rate.Electric pole type blood viscosity measuring instrument can segment the measuring point angle, but blood using amount is increased because of increasing the vertical tube diameter, it is very big that this causes increasing considerably of Measuring Time and tested blood sample to surpass conventional value, for patient can not accept, so the measuring point of above-mentioned two kinds of capillary type blood viscosity measuring instruments is all below three to five, can not obtain successive whole by tangentially low measured value and the Changing Pattern thereof of cutting the blood viscosity measuring instrument of transition of height, can not measure the velocity of blood flow in the capillary tube, resulting viscosity number is relative viscosity (ratio of the time that blood flow flow through with water through time of two arrays of electrodes or photoswitch)

, the electrode of electric pole type blood viscosity measuring instrument influences certainty of measurement with blood ionization, electrode is fragile during operation, and difficulty is demarcated in operation, only accomplish to show printing numerical value, the infrared many shear viscosities analyzer of HSN-A type that the development of Tianjin College of Traditional Chinese Medicine traditional Chinese medical science Graduate School of Engineering is arranged of representative.

The purpose of this utility model is to propose a new design, the quantity of certainty of measurement, repeatable accuracy and the shear rate of raising capillary type blood viscosity measuring instrument is to reach quasi-continuous measurement, can reflect successive blood viscosity Changing Pattern on the viscosimetric basis of capillary tube, main task is the measured value that obtains blood absolute viscosity under quasi-continuous shear rate.

This utility model hemorheology measuring instrument, comprise the computer 11 and amplifying circuit 9 and the interface circuit 10 that measuring-signal are carried out date processing, the printer 12 that is used for data show, measuring-signal is sent into computer 11 through interface 10 again through amplifying circuit 9 amplifications and is carried out date processing, and this measuring instrument also comprises; A vertical tube 5 that holds fluid to be measured is communicated with the capillary tube 6 of horizontal positioned, the upper and lower of vertical tube 5 is provided for detecting two pairs of infrared switches 1 of liquid level respectively, 2,3,4, two pairs of infrared switches are connected with the input of amplifying circuit 9 respectively and the feed-in switching signal, pair of electrodes 7,8 place the vertical lower of the outlet of capillary tube 6, in drop when drippage, is with electrode 7,8 short circuits make it to provide a pulse signal feed-in amplifying circuit 9, electrode 7, liquid tank 17 is established in 8 below, above-mentioned 1,2,3,4,5,6 place the constant water bath box 18 that normal saline is housed, the outlet of capillary tube 6 is guided to outside the water bath 18, by resistance heater 13, the thermostatic control system that temperature sensor 14 and temperature controller 15 are formed, 13 and 14 place water bath 18, and agitator 16 places water bath 18 bottoms.

This instrument adopts two groups of Photoelectric infrared switches as the signal that opens beginning and termination blood level, see accompanying drawing, there is pressure differential in blood in vertical tube, blood flow is crossed capillary tube, drip shape going out interruption-forming, gravity drips drop, make electrode conduction through electrode, through amplifying and the collected computer of interface circuit, by computer instrumentation droplet of blood number and interval thereof, can calculate the capillary tube inner blood flow velocity under the different vertical tube liquid-column heights, can converse the numerical value of shear rate and shearing stress by the height relationships of flow velocity and vertical tube blood post, thereby determined the viscosity rule of this blood sample, when different blood samples was flowed through capillary tube, the capillary tube inner blood flow velocity difference under the identical vertical tube liquid-column height was so the viscosity of this blood sample is also different, the rule difference of viscosity variation just, can determine the deviation and the Changing Pattern thereof of blood sample viscosity and normal value, data acquisition by statistical value or empirical value, processing is finished by computer, and configurable apoplexy is given and reported diagnostic software to form a cover computer-aided diagnosis expert system.For guaranteeing that certainty of measurement has disposed water bath with thermostatic control system and agitator.

The method that this instrument makes capillary type measure blood viscosity rises to the measurement absolute viscosity by relative viscosity, ant is (partial by relative accuracy value under the several shear rates of energy measurement only, deaf discrete) the absolute viscosity value that rises under a plurality of shear rates (by droplet of blood number decision) is (whole, quasi-continuous), it is higher to obtain precision under identical cost, information more comprehensively, the measurement result of datamation, the accuracy and the Hemorheology Study of apoplexy being given the newspaper clinical diagnosis provide low cost, automatic data collection, analyze, the gauge of handling, because this device measures goes out the viscosity number under the quasi-continuous shear rate, the viscosity change law that has reflected blood more all sidedly, rather than the accurate values under several shear rate add the function with computer aided manufacturing post diagnostic expert system, can diagnose by different diagnostic softwares, reduce the workload and the error of clinical diagnosis.Can preserve case history and extend to the viscosity measurement of other newton and non-Newtonian fluid with the comparison of case history in the past, analysis etc., this instrument, as various oils, paint etc.

Accompanying drawing is the structure principle chart of this utility model intelligence hemorheology measuring instrument.

Embodiment:

Adopting internal diameter is that φ 2, external diameter are the glass vertical tube of φ 2.5, effective length (i.e. pipe range between the two pairs of infrared switches) is 250 millimeters, capillary glass internal diameter φ 0.5,100 millimeters of length, amplifier are the LM324 operational amplifier, and interface circuit is MS2401, calculator memory is greater than 512KB, floppy drive 360KB utilizes the said equipment and device to be made into measuring instrument by this utility model principle assembling, and its certainty of measurement ratio of standard oil viscosity (promptly with) reaches ± and 0.5%.

Claims

1, a kind of intelligent hemorheology measuring instrument, comprise the computer [11] and amplifying circuit [9] and the interface circuit [10] that measuring-signal are carried out date processing, the printer [12] that is used for data show, measuring-signal is sent into computer [11] through amplifying circuit [9] amplification through interface circuit [10] and is carried out date processing, of the present utility model being characterised in that comprises that the vertical tube [5] that holds fluid to be measured is communicated with the capillary tube [6] of horizontal positioned, and the upper and lower of vertical tube [5] is provided for detecting two pairs of infrared switches [1], [2], [3], [4] of liquid level respectively; Two pairs of infrared switches are connected with the input of amplifying circuit [9] respectively and the feed-in switching signal, pair of electrodes [7], [8] vertical lower that places capillary tube [6] to export, during the drop drippage electrode [7] and [8] short circuit are made it to provide a pulse signal feed-in amplifying circuit [9], electrode [7], [8] liquid poor [17] is established in below, above-mentioned [1], [2], [3], [4], [5], [6] place the constant water bath box [18] that normal saline is housed, [6] outlet is guided to outside [18], by resistance heater [13], the thermostatic control system that temperature sensor [14] and temperature controller [15] are formed, [13] and [14] place constant water bath box [18], agitator [16] places constant water bath box [18] bottom.