KR20190108306A - Anemia measurement system and method using hematocrit - Google Patents

Abstract

The present invention relates to a system and a method to measure the extent of anemia through a hematocrit. More specifically, the system includes: a blood measurement strip applying power to an inner electrode pattern layer when a blood sample is injected; and a measurement terminal confirming whether an impedance correction value is received from the blood measurement strip when the blood measurement strip is inserted, thereby calculating an impedance estimation value of the blood sample reflecting the impedance correction value when receiving the impedance correction value, and then, searching a pre-stored lookup table for a hematocrit value matched with the impedance estimation value, thereby determining whether the blood sample indicates anemia based on the determined hematocrit value. Therefore, according to the present invention, the anemia measurement system is capable of quickly and conveniently determining whether a blood sample indicates anemia by calculating the corrected impedance estimation value for the blood sample, searching for a hematocrit value matched therewith, and then, comparing the hematocrit value to a hematocrit value belonging to a normal range.

Description

Anemia measurement system and method using hematocrit

The present invention relates to a system and method for measuring anemia using hematocrit, and more particularly, to estimate hematocrit level using an impedance value of a blood sample, and then to use the hematocrit, which can easily determine whether anemia occurs in the blood sample. It relates to an anemia measurement system and method used.

Anemia, which occurs mainly in adolescents or pregnant women, refers to cases in which the blood does not supply enough oxygen for metabolism of human tissues, resulting in hypoxia of the tissues. Since red blood cells in the blood are responsible for supplying oxygen to tissues, anemia can be diagnosed based on hemoglobin in red blood cells. Symptoms of anemia include weakness, dizziness, chest pain, pale skin, irregular heartbeats, limbs, and headaches.

Therefore, since it is difficult for a patient to easily recognize anemia only with the symptoms of anemia, it is very important to measure blood components more accurately for measuring anemia.

However, in such a blood component value measurement process, an error is likely to occur due to a measurement environment or a condition, and thus, it is difficult to accurately measure blood component values.

Korea Patent Publication 10-0829928 (2008.05.08.)

Therefore, the present invention is to solve this problem, the problem to be solved by the present invention by taking into account the hematocrit level that affects the blood component measurement more accurately by measuring the component value in the blood more accurately, the accuracy of anemia measurement An anemia measurement system and method using hematocrit can be improved.

In the anemia measurement system using hematocrit according to an embodiment of the present invention, when a blood sample is introduced, power is supplied to an internal electrode pattern layer to measure at least one of an impedance reference value and an impedance measurement value for the blood sample. strip; And when the blood measurement strip is inserted therein, confirms whether an impedance reference value is received from the blood measurement strip, and when receiving the impedance reference value, calculates an impedance correction value based on the impedance reference value, and then the impedance correction value. Calculate an impedance estimate of the blood sample by correcting the impedance measurement received from the blood measurement strip, and search for a hematocrit value matching the impedance estimate from a pre-stored lookup table, based on the retrieved hematocrit value. And a measurement terminal for determining whether anemia has occurred for the blood sample.

The blood measurement strip is attached to the lower plate, the lower plate on which the electrode pattern layer is formed, the middle plate on which the channel region for the inflow of the blood sample is formed, and the middle plate, and an air exhaust port at least partially overlapping the channel region. The electrode pattern layer includes a formed upper plate, and the electrode pattern layer includes a pair of impedance measuring electrodes to which power is applied, a blood sensing electrode to detect whether a blood sample is introduced into the channel region, and a strip insertion recognition to detect whether the measuring terminal is inserted into the measuring terminal. It may include an electrode and a ground voltage electrode.

The electrode pattern layer may further include a resistance connected between the pair of impedance measuring electrodes, and a correction confirmation electrode connected to the impedance measuring electrode and measuring an impedance reference value of the blood sample.

The measurement terminal measures the temperature of the blood pressure sample flows into the sensor interface unit, at least one of the impedance reference value and the impedance measurement value from the blood measurement strip, the blood measurement strip, and transmits the measured temperature information to the control unit The measurement unit determines whether the temperature information of the blood sample received from the temperature measuring unit is within a preset normal range, the temperature information of the blood sample is included within a preset normal range, and impedance from the sensor interface unit is determined. Upon receiving the reference value, the gain coefficient is calculated using the impedance reference value, the impedance correction value is calculated using the gain coefficient, and the impedance estimate value is corrected by correcting the impedance measurement value input to the sensor interface based on the impedance correction value. Calculate the impedance When the hematocrit value corresponding to the value is retrieved from the prestored lookup table, and the retrieved hematocrit value is compared with the prestored hematocrit value in the stored normal range, if the retrieved hematocrit value is less than the hematocrit value in the normal range, the anemia of the blood sample It includes a control unit for determining the occurrence, a display unit for outputting an anemia occurrence determination result of the blood sample generated from the control unit to the outside and a power supply unit for supplying power for driving to each component, including a battery therein. .

When the temperature of the blood sample is out of a predetermined normal range, the measuring terminal performs a wired or wireless communication with an alarm unit that outputs a warning message to the outside, and transmits the impedance estimate value and the hematocrit value to the external terminal. The communication unit may further include a lookup table in which normal range temperature information of the blood sample, a plurality of impedance estimates, and a hematocrit value corresponding to each of the blood samples are matched with each other, and a storage unit storing a reference gain coefficient and a hematocrit value of the normal range.

If the control unit does not receive the impedance reference value from the blood measurement strip, the controller calculates an impedance correction value using the impedance measurement value input from the sensor interface unit and a previously stored reference gain coefficient, and based on the impedance correction value. After calculating the impedance estimate by correcting the impedance measurement value, the hematocrit value corresponding to the impedance estimate value is searched from the pre-stored lookup table, and then the retrieved hematocrit value is compared with the prestored hematocrit value in the normal range. When the hematocrit level is less than the normal range, the method may further include determining anemia for the blood sample.

In the anemia measurement method using hematocrit according to an embodiment of the present invention, the measurement terminal determines whether a blood measurement strip into which a blood sample has been introduced is inserted into the measurement terminal, and the measurement terminal applies power to the blood measurement strip. Receiving at least one of an impedance reference value or an impedance measurement value from the blood measurement strip, checking whether the measurement terminal receives an impedance reference value from the blood measurement strip, and the measurement terminal is impedance from the blood measurement strip. When the reference value is received, calculating an impedance estimate value of the blood sample based on the impedance reference value, the measurement terminal retrieving the haematocrit value corresponding to the impedance estimate value from the previously stored lookup table and the measurement terminal is Searched Determining whether anemia has occurred in the blood sample based on the level of the matoclerite.

Measuring the remaining amount of the battery provided therein before performing the step of determining whether the blood measurement strip into which the blood sample has been introduced is inserted into the measurement terminal, measuring the temperature of the blood sample; and The method may further include determining whether the measured temperature information is within a predetermined normal range.

Outputting a warning message when the measurement terminal is out of a predetermined normal range of the blood sample, transmitting, by the measurement terminal, the impedance estimate value and the hematocrit value to an external terminal through wired or wireless communication, and the measurement The terminal may further include updating the impedance estimate value and the hematocrit value to a look-up table previously stored therein.

When the measurement terminal receives an impedance reference value from the blood measurement strip, calculating an impedance estimate value of the blood sample based on the impedance reference value, calculating a gain factor using the impedance reference value, using the gain factor The method may include calculating an impedance correction value and calculating an impedance estimate by reflecting the impedance correction value to an impedance measurement value input from the blood measurement strip.

If the measurement terminal does not receive an impedance reference value from the blood measurement strip, calculating the impedance correction value by using the impedance measurement value received from the blood measurement strip and a reference reference coefficient stored in advance; Calculating an impedance estimate by reflecting the impedance correction value to the impedance measurement value by the terminal; retrieving the hematocrit value corresponding to the impedance estimate value from the pre-stored lookup table; and the hematocrit retrieved by the measurement terminal The method may further include determining whether anemia has occurred in the blood sample based on the numerical value.

As described above, the system and method for measuring anemia using hematocrit according to the present invention calculates an impedance estimate corrected for a blood sample, searches for a matched hematocrit value, and then compares the retrieved hematocrit value with a hematocrit value within a normal range. By comparing, it is possible to easily and quickly determine whether anemia has occurred in the blood sample.

1 is a schematic diagram of anemia measurement system using hematocrit according to an embodiment of the present invention.
2 is a perspective view showing the structure of a blood measurement strip.
3 is a block diagram of a measurement terminal.
Figure 4 is a flow chart showing the steps performed before, before performing the anemia measurement method using hematocrit according to another embodiment of the present invention.
5 is a flowchart illustrating a method for measuring anemia using hematocrit according to another embodiment of the present invention.
6 is a flowchart illustrating the steps after determining whether anemia has occurred.
7 is a graph showing a correlation between an impedance estimate and a hematocrit value.
8 is a graph showing a lookup table showing impedance estimates and hematocrit values matched thereto.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, these examples are intended to illustrate the present invention in more detail, it will be apparent to those skilled in the art that the scope of the present invention is not limited thereto.

The configuration of the invention for clarifying the solution to the problem to be solved by the present invention will be described in detail with reference to the accompanying drawings based on the preferred embodiment of the present invention, the same in the reference numerals to the components of the drawings The same reference numerals are given to the components even though they are on different drawings, and it is to be noted that in the description of the drawings, components of other drawings may be cited if necessary. However, this is not intended to limit the present invention to a specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In addition, in describing the operation principle of the preferred embodiment of the present invention in detail, when it is determined that the detailed description of the known function or configuration and other matters related to the present invention may unnecessarily obscure the subject matter of the present invention, The detailed description is omitted.

In addition, throughout the specification, when a part is 'connected' to another part, it is not only 'directly connected' but also 'indirectly connected' with another element in between. Include. In addition, the term 'comprising' a certain component means that the component may be further included, without excluding the other component unless specifically stated otherwise.

In addition, terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms may be used for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof that is practiced, and that one or more other features or numbers are present. It should be understood that it does not exclude in advance the possibility of the presence or addition of steps, actions, components, parts or combinations thereof.

Unless specifically defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. .

An object of the present invention is to easily determine whether anemia occurs for a blood sample in consideration of hematocrit levels in blood.

Hereinafter, the anemia measurement system using hematocrit according to an embodiment of the present invention will be described in more detail with reference to FIGS. 1 to 3.

1 is a schematic diagram of anemia measurement system using hematocrit according to an embodiment of the present invention.

As shown in FIG. 1, the anemia measurement system 100 using the hematocrit of the present invention includes a blood measurement strip 120 and a measurement terminal 140.

When a blood sample is introduced, the blood measurement strip 120 is supplied with power to the internal electrode pattern layer to measure at least one of an impedance reference value and an impedance measurement value for the blood sample.

When the blood measurement strip is inserted therein, the measurement terminal 140 checks whether an impedance reference value is received from the blood measurement strip, and when receiving the impedance reference value, calculates an impedance correction value based on the impedance reference value. And calculating an impedance estimate of the blood sample by correcting the impedance measurement value received from the blood measurement strip based on the impedance correction value, searching for a hematocrit value matching the impedance estimate value from a pre-stored lookup table. The anemia of the blood sample is determined based on the hematocrit level.

Hereinafter, referring to FIG. 2, the structure of the blood test strip will be described in more detail.

2 is a perspective view showing the structure of a blood measurement strip.

As shown in FIG. 2, the blood measurement strip 120 of the present invention includes a lower plate 122, a middle plate 123, and an upper plate 124.

The lower plate 122 is a substrate on which the electrode pattern layer 123 is formed, and is made of an insulating material. For example, the lower plate 122 may be formed of a polyethylene terephthalate (PET) film, and in plan view, may be formed into a rectangle having long sides and short sides. However, at this time, the lower plate 122 is not limited to the rectangular shape, it may be modified in various forms.

The electrode pattern layer 123 is made of an electrically conductive material. For example, the electrode pattern layer 123 may be made of any one material of gold, silver, aluminum, or copper, or nickel / electroless plated copper / nickel or copper. Nickel and gold may in turn be in the form of electroless plated copper / nickel / gold and the like. The electrode pattern layer 123 includes impedance measuring electrodes 123b and 123f, a blood detection electrode 123c, a strip insertion recognition electrode 123d, and a ground voltage electrode 123e.

Power is applied to the impedance measuring electrodes 123b and 123f from the measurement terminal 140, and the impedance measurement value of the blood sample is measured. For example, a power supply of about 8KHz and 2.5V can be applied.

The blood detection electrode 123c detects whether a blood sample is introduced into the channel region.

The strip insertion recognition electrode 123d senses whether the strip insertion recognition electrode 123d is inserted into the measurement terminal.

In this case, when the electrode pattern layer 123 is used to measure the impedance reference value of the blood sample, the impedance measurement electrodes 123b and 123f, the blood detection electrode 123c, the strip insertion recognition electrode 123d, and the ground may be used. In addition to the voltage electrode 123e, a resistor connected between the pair of impedance measuring electrodes and a correction confirmation electrode 123a may be further included.

In the case of the reference strip, a resistance of 15k ohm is connected between the pair of impedance measuring electrodes 123b and 123f, and the impedance correction value is transmitted to the measurement terminal 140 through the correction confirmation electrode 123a.

The calibration check electrode 123a measures the impedance reference value of the blood sample.

The middle plate 124 is attached to the lower plate 122, and the channel region 125 for the inflow of the blood sample is formed. The middle plate 124 serves to bond the lower plate 122 and the upper plate 126, and for this purpose, may be formed of a material having self adhesiveness, or may have a structure in which an adhesive material is formed on both sides of an insulating film. have. In addition, the middle plate 124 may determine the amount of blood substantially flowing into the blood measurement strip 120 through the size adjustment of the channel region 125.

In addition, the middle plate 124 may be formed to have a smaller size than the lower plate 122 so that a portion of the electrode pattern layer 123 formed on the lower plate 122 is exposed to the outside. For example, one end where the channel region 125 of the middle plate 124 is formed is formed to be aligned with one end of the lower plate 122, while the other end opposite to the channel region 125 is an electrode pattern layer. It may be formed to be located inward from the other end of the lower plate 122 so that a portion of the 123 is exposed.

An upper plate 126 is attached to the middle plate 124, and an air exhaust port 127 is formed at least partially overlapping the channel region 125. Therefore, when a blood sample flows into the channel region 125, the air inside the channel region 125 is discharged to the outside through the air exhaust port 127 by capillary action.

The upper plate 126 is formed at substantially the same position as the middle plate 124 to expose a portion of the electrode pattern layer 123 to the outside. The portion of the electrode pattern layer 123 exposed to the outside by the middle plate 124 and the upper plate 126 is electrically connected to the measurement terminal 140 when the blood measurement strip 120 is coupled to the measurement terminal 140. These connections make the input of the power supply, the impedance reference value and the output of the measured value.

Hereinafter, with reference to Figure 3, it will be described in more detail with respect to the measuring terminal of the present invention.

3 is a block diagram of a measurement terminal.

As shown in FIG. 3, the measurement terminal 140 of the present invention includes a sensor interface unit 141, a temperature measuring unit 142, a control unit 143, a display unit 144, and a power supply unit 145.

The sensor interface 141 receives at least one of an impedance reference value and an impedance measurement value from the blood measurement strip 120.

The temperature measuring unit 142 measures the temperature of the blood sample introduced into the blood measurement strip 120 and transmits the measured temperature information to the control unit 143.

The controller 143 determines whether the temperature information of the blood sample received from the temperature measuring unit 142 is within a preset normal range, the temperature information of the blood sample is included within a preset normal range, and the sensor When the impedance reference value is received from the interface unit 141, a gain factor is calculated using the impedance reference value, an impedance correction value is calculated using the gain factor, and the sensor interface unit is based on the impedance correction value. Compensate the impedance measurement value inputted at 141 to calculate the impedance estimate value, retrieve the hematocrit value corresponding to the impedance estimate value from a pre-stored lookup table, and then compare the retrieved hematocrit value with the prestored hematocrit value in the normal range. The hematocrit level detected by the test was less than the hematocrit level in the normal range. If it is determined anemia occurs in the blood sample. If the controller 143 does not receive the impedance reference value from the blood measurement strip 120, the controller 143 calculates an impedance correction value by using the impedance measurement value input from the sensor interface unit 141 and a previously stored reference gain coefficient. Based on the impedance correction value, the impedance measurement value is corrected to calculate an impedance estimate value, the hematocrit value corresponding to the impedance estimate value is retrieved from a prestored lookup table, and then the retrieved hematocrit value is a hematocrit value in the pre-stored normal range. When the detected hematocrit level is less than the hematocrit level in the normal range, anemia of the blood sample may be determined.

The display unit 144 outputs the anemia determination result of the blood sample generated from the control unit 143 to the outside.

The power supply unit 145 includes a battery therein and supplies power for driving to each component.

In addition, the measurement terminal 140, in addition to the above-described sensor interface 141, temperature measuring unit 142, control unit 143, display unit 144, power supply unit 145, alarm unit 146, The communication unit 147 and the storage unit 148 are included.

The alarm unit 146 outputs a warning message to the outside when the temperature of the blood sample is outside the preset normal range.

The communication unit 147 performs wired / wireless communication with an external terminal to transmit the impedance estimate value and the hematocrit value to the external terminal.

The storage unit 148 stores a normal range temperature information of the blood sample, a lookup table in which a plurality of impedance estimates and corresponding hematocrit values are matched with each other, a reference gain coefficient, and a normal range of hematocrit values. In this case, the storage unit 148 may be one of an eeprom or a flash memory.

Hereinafter, referring to FIG. 4, before performing the anemia measurement method using hematocrit according to another embodiment of the present invention, the steps performed in advance will be described in more detail.

As shown in Figure 4, before performing the anemia measurement method using hematocrit according to another embodiment of the present invention, looking at the steps performed in advance, the measurement terminal 140 is a blood measurement strip 120 in its interior Prior to performing the process of determining whether or not to be inserted (S210), the remaining amount of the battery provided therein is measured (S201).

Subsequently, the temperature of the blood sample to measure whether anemia occurs is measured (S202).

At this time, it is determined whether the measured temperature information is included in a predetermined normal range (S203). If it is determined that the measured temperature information is within a predetermined normal range, the blood sample may be determined to be a sample suitable for measuring anemia. In particular, the temperature information of the predetermined normal range may be 10 to 40 ℃.

5 is a flowchart illustrating a method for measuring anemia using hematocrit according to another embodiment of the present invention.

As shown in FIG. 5, in the anemia measurement method using the hematocrit of the present invention, when the measurement terminal 140 includes the measured temperature information described above with reference to FIG. 4 within a predetermined normal range, the blood sample is introduced. It is determined whether the blood measurement strip 120 is inserted into the inside (S210). In this case, the measurement terminal 140 of the measurement terminal 140 through a signal received from the strip insertion recognition electrode 123d of the electrode pattern layer 123 formed on the lower plate 122 of the blood measurement strip 120. It is determined whether the blood measurement strip 120 is inserted therein.

Subsequently, the measurement terminal 140 applies power to the blood measurement strip 120 to receive at least one of an impedance reference value or an impedance measurement value from the blood measurement strip 120 (S220).

It is checked whether the measurement terminal 140 receives an impedance reference value from the blood measurement strip 120 (S230).

When the measurement terminal 140 receives the impedance reference value from the blood measurement strip 120, the impedance estimation value of the blood sample is calculated based on the impedance reference value (S240). That is, the measurement terminal 140 first calculates a gain factor using an impedance reference value and an impedance measurement value, calculates an impedance correction value using the calculated gain factor, and inputs the blood from the blood measurement strip 120. The impedance estimation value may be calculated by adding or subtracting the impedance correction value to the measured impedance measurement value.

In this case, the gain factor may be calculated through Equation 1 below.

[Equation 1]

Gain Factor = (1 / impedance reference) / impedance measurement

In addition, the impedance correction value may be calculated as in Equation 2 below using the gain coefficient calculated as described above.

[Equation 2]

Impedance correction value = 1 / (Gain Factor x impedance measurement value)

The measurement terminal 120 retrieves the hematocrit value corresponding to the impedance estimate from the pre-stored lookup table (S250). In this case, the lookup table stores hematocrit values in one-to-one correspondence with respect to the plurality of impedance estimates. That is, the hematocrit level used at this time is a value expressing the volume fraction of red blood cells in blood as a percentage.

On the basis of the hematocrit value searched by the measurement terminal 120, it is determined whether anemia has occurred for the blood sample introduced into the blood measurement strip 120 (S260). Hematocrit levels are 40-50% for healthy adult men and hematocrit levels 35-45% for healthy adult women. Therefore, when the retrieved hematocrit level is less than the normal range of the hematocrit level, it can be determined that anemia has occurred in the blood sample.

6 is a flowchart illustrating the steps after determining whether anemia has occurred.

As shown in FIG. 6, if the measurement terminal 140 is out of a predetermined normal range of the measurement temperature of the blood sample, a warning message is output (S290).

The measurement terminal 140 transmits the impedance estimation value and the hematocrit value to an external terminal through wired / wireless communication (S300).

The measurement terminal 140 updates the impedance estimate value and the hematocrit value to a lookup table previously stored therein (S310). Therefore, the hematocrit value corresponding to the impedance estimation value can be grasped more accurately.

5, if the measurement terminal 140 does not receive the impedance reference value from the blood measurement strip 120, the measurement terminal 140 and the impedance measurement value received from the blood measurement strip 120 An impedance correction value is calculated using the previously stored reference gain coefficient (S270). That is, the measurement terminal 140 may calculate the impedance correction value by applying the impedance measurement value and the reference gain coefficient to Equation 2.

Subsequently, the process returns to step S250, and the measurement terminal 140 searches for the hematocrit value corresponding to the impedance estimate value from a pre-stored lookup table, and then determines whether anemia for the blood sample is generated based on the retrieved hematocrit value. It may be (S260).

Hereinafter, the correlation between the impedance estimated value calculated in the anemia measurement system and method using hematocrit according to the present invention and the actual blood concentration will be examined.

The blood used in this evaluation was set to separate concentrations of plasma and blood cells from venous blood. At this time, the red blood cell concentration was set to 0, 10, 21, 33, 43, 48, 64 g / dl. The red blood cell concentration thus set is a value corresponding to human red blood cell concentration.

As shown in FIG. 7, it can be seen that impedance estimates are different depending on the volume ratio of red blood cells, that is, hematocrit. As a result, it can be seen that the hematocrit level used to determine whether anemia in the blood sample is affected by the impedance estimation value.

In addition, in the present invention, when the lookup table that matches the plurality of impedance estimates used and the corresponding hematocrit values may be graphed, it may be displayed as shown in FIG. 8.

That is, when the impedance estimate of the blood sample calculated by reflecting the impedance correction value according to the present invention is 3600 ohm, and the blood sample is obtained from an adult female, the corresponding hematocrit value is 21%. It can be seen that the level is much lower than the hematocrit level within the normal range, for example, between 35 and 45% of the hematocrit level in healthy adult women, in which case it can be determined that anemia has occurred in the blood sample.

As described above, the system and method for measuring anemia using hematocrit according to the present invention calculates an impedance estimate corrected for a blood sample, searches for a matched hematocrit value, and then compares the retrieved hematocrit value with a hematocrit value within a normal range. By comparing, it is possible to easily and quickly determine whether anemia has occurred in the blood sample.

Preferred embodiments of the present invention are described for the purpose of illustration, and those skilled in the art will be able to make various modifications, changes, and additions within the spirit and scope of the present invention. Additions should be considered to be within the scope of the following claims.

120: blood measurement strip 122: lower plate
123: electrode pattern layer 123a: correction confirmation electrode
123b and 123f: impedance measuring electrode 123c: blood detection electrode
123d: strip insertion recognition electrode 123e: GND
124: Medium 125: Channel area
126: top plate 127: air exhaust
140: measuring terminal 141: sensor interface unit
142: temperature measuring unit 143: control unit
144: display unit 145: power supply unit
146: alarm unit 147: communication unit
148: storage unit

Claims (11)

When the blood sample is introduced, the power is applied to the internal electrode pattern layer, the blood measurement strip for measuring at least one of the impedance reference value and impedance measurement value for the blood sample; And
When the blood measurement strip is inserted therein, it is checked whether an impedance reference value is received from the blood measurement strip, and when receiving the impedance reference value, an impedance correction value is calculated based on the impedance reference value, Calculate an impedance estimate of the blood sample by correcting the impedance measurement value received from the blood measurement strip, and search for a hematocrit value matching the impedance estimate from a pre-stored lookup table, based on the retrieved hematocrit value. A measurement terminal for determining whether anemia has occurred in the blood sample;
Anemia measurement system using a hematocrit including a.
The method of claim 1,
The blood measurement strip
A lower plate on which an electrode pattern layer is formed;
A middle plate attached to the lower plate and having a channel region for inflow of a blood sample; And
A top plate attached to the middle plate and having an air exhaust port at least partially overlapping the channel region;
The electrode pattern layer is
A pair of impedance measuring electrodes to which power is applied;
A blood detection electrode detecting whether a blood sample is introduced into the channel region;
A strip insertion recognition electrode for sensing whether the measurement terminal is inserted into the terminal; And
A ground voltage electrode;
Anemia measurement system using hematocrit, comprising a.
The method of claim 2,
The electrode pattern layer is
A resistor connected between the pair of impedance measuring electrodes;
A calibration confirmation electrode connected to the impedance measurement electrode to measure an impedance reference value of the blood sample;
Anemia measurement system using hematocrit, further comprising a.
The method of claim 1,
The measuring terminal
A sensor interface unit configured to input at least one of an impedance reference value and an impedance measurement value from the blood measurement strip;
A temperature measuring unit measuring a temperature of a blood sample flowing into the blood measuring strip and transmitting the measured temperature information to a control unit;
It is determined whether temperature information of the blood sample received from the temperature measuring unit is included in a preset normal range, temperature information of the blood sample is included in a preset normal range, and an impedance reference value is received from the sensor interface unit. In this case, a gain coefficient is calculated using the impedance reference value, an impedance correction value is calculated using the gain coefficient, and an impedance estimation value is calculated by correcting an impedance measurement value input to the sensor interface based on the impedance correction value. If the hematocrit value corresponding to the impedance estimate is searched from the prestored lookup table, and the retrieved hematocrit value is compared with the prestored hematocrit value in the normal range, the hematocrit value is less than the hematocrit value in the normal range. Anemia of A controller for determining a life;
A display unit configured to externally output a result of determining whether anemia of the blood sample generated by the controller is generated; And
A power supply unit including a battery therein to supply power for driving to each component;
Anemia measurement system using hematocrit, comprising a.
The method of claim 4, wherein
The measuring terminal
An alarm unit that outputs a warning message to the outside when the temperature of the blood sample is outside a preset normal range;
A communication unit for performing wired and wireless communication with an external terminal to transmit the impedance estimate value and the hematocrit value to the external terminal; And
A storage unit for storing a normal range temperature information of the blood sample, a lookup table in which a plurality of impedance estimates and corresponding hematocrit values are matched with each other, a reference gain coefficient, and a normal range of hematocrit values;
Anemia measurement system using hematocrit, further comprising a.
The method of claim 4, wherein
The control unit
If the impedance reference value is not received from the blood measurement strip, an impedance correction value is calculated by using the impedance measurement value input from the sensor interface unit and a previously stored reference gain coefficient, and the impedance measurement value is based on the impedance correction value. Calculates an impedance estimate by calculating the impedance, retrieves the hematocrit value corresponding to the impedance estimate from a pre-stored lookup table, and compares the retrieved hematocrit value with a pre-stored hematocrit value in the normal range. If the hematocrit level is less than, the anemia measurement system using hematocrit, characterized in that it further comprises determining the occurrence of anemia for the blood sample.
Determining, by the measurement terminal, whether a blood measurement strip into which a blood sample has been introduced is inserted;
The measurement terminal applying power to the blood measurement strip to receive at least one of an impedance reference value or an impedance measurement value from the blood measurement strip;
Checking whether the measurement terminal receives an impedance reference value from the blood measurement strip;
Calculating an impedance estimate of the blood sample based on the impedance reference value when the measurement terminal receives an impedance reference value from the blood measurement strip;
Searching, by the measurement terminal, a pre-stored lookup table for a hematocrit value corresponding to the impedance estimate value; And
Determining whether anemia has occurred in the blood sample based on the hematocrit value retrieved by the measurement terminal;
Anemia measurement method using a hematocrit including a.
The method of claim 7, wherein
Before the measuring terminal performs a step of determining whether the blood measurement strip into which the blood sample has been introduced is inserted,
Measuring a remaining amount of a battery provided therein;
Measuring the temperature of the blood sample; And
Determining whether the measured temperature information is within a preset normal range;
Anemia measurement method using hematocrit, further comprising a.
The method of claim 8,
Outputting a warning message when the measurement terminal is out of a predetermined normal range of the blood sample;
Transmitting, by the measurement terminal, the impedance estimate value and the hematocrit value to an external terminal through wired or wireless communication; And
Updating, by the measurement terminal, the impedance estimate value and the hematocrit value to a lookup table stored therein;
Anemia measurement method using hematocrit, further comprising a.
The method of claim 7, wherein
When the measurement terminal receives an impedance reference value from the blood measurement strip, calculating an impedance estimate of the blood sample based on the impedance reference value
Calculating a gain factor using the impedance reference value;
Calculating an impedance correction value using the gain factor; And
Calculating an impedance estimate by reflecting the impedance correction value to an impedance measurement value input from the blood measurement strip;
Anemia measurement method using hematocrit, characterized in that it comprises a.
The method of claim 7, wherein
If the measurement terminal does not receive an impedance reference value from the blood measurement strip, calculating the impedance correction value by using the impedance measurement value received from the blood measurement strip and a previously stored reference gain coefficient;
Calculating, by the measurement terminal, an impedance estimation value by reflecting the impedance correction value to the impedance measurement value;
Searching, by the measurement terminal, a hematocrit value corresponding to the impedance estimate value from a pre-stored lookup table; And
Determining whether anemia has occurred in the blood sample based on the hematocrit value retrieved by the measurement terminal;
Anemia measurement method using hematocrit, further comprising a.

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