WO2001053838A1 - Method for quantitating creatinine discharged in urine, method for measuring urine component and apparatus therefor - Google Patents
Method for quantitating creatinine discharged in urine, method for measuring urine component and apparatus therefor Download PDFInfo
- Publication number
- WO2001053838A1 WO2001053838A1 PCT/JP2000/000276 JP0000276W WO0153838A1 WO 2001053838 A1 WO2001053838 A1 WO 2001053838A1 JP 0000276 W JP0000276 W JP 0000276W WO 0153838 A1 WO0153838 A1 WO 0153838A1
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- Prior art keywords
- urine
- creatinine
- measuring
- amount
- weight
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/70—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving creatine or creatinine
Definitions
- TECHNICAL FIELD A method for measuring the amount of creatinine excreted in urine and urine components, and an apparatus
- the present invention relates to a method and an apparatus for measuring the amount of creatinine excreted in urine and components in urine.
- urinary components such as urinary sugar, urinary protein, and urine salt has long been used as an index for disease detection and health management guidance. For example, if you have a lot of urine sugar, you may have diabetes, if you have a lot of urine protein, you may have nephritis, and if you have a lot of urine salt, you may have high blood pressure, so these symptoms are seen. In such cases, more detailed examinations can be performed, and guidance and treatment for diseases can be performed. Therefore, measurement of urine components is very effective in the medical field.
- creatinine In the measurement of urine components, the amount and concentration of creatinine in urine are usually measured. Creatinine is always present in human urine as human excrement, so it is used to correct the concentration of urine in the measurement of other urine components. Urinary creatinine concentration is considered important because urinary creatinine levels may indicate the possibility of kidney disease or uremia.
- urine salt which is one of urine components
- a method using a urine salt measurement test paper a method using a urine salt measurement test paper
- urine, subjects exercise and diet is affected drinking water such as urine component urination your capital
- these methods can measure the concentration of urine components in each measurement batch and the total amount of components in the test urine, but the amount of urinary excretion in one or several days can be measured by these methods. Cannot be measured.
- the measured values tend to fluctuate, which is insufficient as an index for health management guidance.
- urine collection it is necessary to store at least one day's urine (hereinafter referred to as urine collection) in order to perform highly accurate measurement by the above-mentioned method. Requires a device such as a urine storage bag, which requires a lot of labor and a heavy burden on the subject. In addition, urine had to be kept for 24 hours, and there were problems such as changes in urine components over time.
- the present invention can be used to accurately obtain the total excretion amount and urine amount of urine components used as an index for disease detection and health care guidance within a certain period without storing urine.
- An object of the present invention is to provide a simple method for measuring the amount of creatinine excreted in urine, a method for measuring a urine component using the measured amount of creatinine, and a device for measuring a urine component.
- the first aspect of the present invention comprises a step of obtaining a regression equation representing a correlation between the weight index value and the amount of urinary excreted creatinine in a certain period of time, and thereafter, measuring the weight index value of the subject to determine
- This is a method for measuring the amount of creatinine excreted in urine, which comprises a step of substituting into a regression equation.
- the second present invention provides a method of multiplying a value obtained by dividing the amount of creatinine excreted in urine obtained by the measuring method of the first present invention by a creatinine concentration in a test urine, and a concentration of a substance to be measured in a test urine. This is a urine component measurement method realized by using the calculated values.
- the third invention is a urine component measuring device using the measurement method of the second invention.
- the “certain period” may be any period of one day or more, and may be, for example, one day, two days, or 2.5 days. However, the upper limit is preferably 7 days or less.
- the “weight index value” means a value representing the weight involved in urinary excretion. As the weight index value, Weight, lean body mass, body fat weight, BMI, and the like.
- the above-mentioned lean body mass refers to a body weight obtained by subtracting body fat weight from total body weight ((body weight) 1 (body fat weight)), a body weight obtained by subtracting body fat weight and bone weight from total body weight [(body weight 1) (body fat weight) 1 (bone weight)] or means the total protein weight of the human body.
- the method for measuring the lean body mass is not particularly limited.
- indirect methods such as a method of measuring body density by a weighed body weight method in water and calculating a lean body mass, a method of calculating from a sebum thickness, and the like; DEXA method A method to directly measure lean body mass and total protein weight, such as a method using 4 ° K radioactive material ( ⁇ 4 ⁇ method) and a method using near infrared rays (Near infrared method); Method and the like.
- the method of measuring and obtaining the human body impedance is preferable.
- the body fat weight can be measured using a commercially available body fat meter.
- a device capable of measuring the body fat percentage it can be obtained from the body weight and the body fat percentage.
- a device used for measuring the lean body mass by measuring the above-mentioned human body impedance if it is a device capable of measuring the body fat weight or the lean body mass, the measuring electrode mounting site, the measuring frequency, etc. Is not particularly limited.
- a commercially available product can be used as the above device, for example, a weighing scale with a fat meter TBF 534 (manufactured by Yufui Yu), an OMRON body fat meter HBF 301 (manufactured by OMRON), a multi-frequency type body Fat scale ⁇ LT 100 (manufactured by Sekisui Chemical Co., Ltd.), Fat Par Center S—201 (manufactured by Sekisui Chemical Co., Ltd.) and the like. Above all, Fat Par Center S-201 is preferred.
- the Fat Percent Yuichi S-201 can measure the body fat weight, lean body mass, and body water amount by passing a high frequency of 50 kHz to the human body and measuring the impedance value. .
- a method of obtaining the lean body mass using a body mass index may be employed.
- B MI body mass index
- the unit of weight is kg and the unit of height is m. That is, the BMI of a human weighing 6 O kg and a height of 1.7 m is 21 [kg ⁇ m ” 2 ].
- the body fat percentage can be determined by correlating the BM I with the body fat percentage and calculating a regression equation.
- the regression equation is not particularly limited, and includes, for example, linear regression, quadratic regression, logarithmic regression, and the like. In the present invention, any regression equation may be used as long as the correlation coefficient between the above BMI and the body fat percentage is 0.6 or more, preferably 0.8 or more.
- the body fat percentage (%) can be expressed by the following equation (1).
- a is — 2 to 2 and b is — 10 to 10.
- the lean body mass (kg) can be obtained by substituting the body fat percentage obtained from the regression equation into the following equation (2).
- a regression equation representing a correlation between the weight index value and the urinary creatinine amount within a certain period is obtained.
- the weight index value and urinary creatinine amount within the fixed period are measured and accumulated until now.
- the regression equation is not particularly limited, and includes, for example, first-order regression, second-order regression, logarithmic regression, and the like.
- any regression equation may be used so that the correlation coefficient between the weight index value and the amount of urinary creatinine in a certain period of time is 0.6 or more, preferably 0.8 or more.
- variables a, b, c, d, e, and f in the above regression formulas (3) to (5) are set as appropriate after being classified according to factors such as gender and age.
- the amount of urinary excreted creatinine in a certain period is calculated by measuring the subject's weight index value and substituting it into the regression equation.
- the subject's weight index value can be appropriately selected according to the weight index value used in the regression equation to be used.
- the amount of urinary excreted creatinine within a certain period of time determined by the regression equation, the amount of creatinine in a test urine for one urination and the amount of the test urine, or the concentration of urine in the test urine, By measuring the amount of urine, it is possible to calculate the amount of urine in a certain period without storing urine.
- the daily urine volume is calculated by the following equation (6) or the following equation (7).
- the method for measuring the amount of creatinine excreted in urine according to the first aspect of the present invention can be used to detect disease and improve health by measuring the total amount and concentration of the measurement target component in a test urine in one urination. It is possible to calculate the total amount of urinary excretion in a certain period of time for other urinary components that serve as indices for health management guidance.
- the urinary components are not particularly limited, and include, for example, urinary sugar, urinary salt, urinary albumin, urine protein, urinary peropirinogen, urinary pyrilvin, urinary N-acetyl / 3-D—darcosaminidase (urine NAG), urinary 32 microglobulin, urinary ⁇ 1 microglobulin, urinary ketone bodies, urinary polyamine, urinary 5-hydroxyindole acetate (urine 5-HIAA), GTP, GTP, GOP, amylase, cholesterol, lipid, calcium and the like.
- urinary sugar urinary salt, urinary albumin, urine protein, urinary peropirinogen, urinary pyrilvin, urinary N-acetyl / 3-D—darcosaminidase (urine NAG), urinary 32 microglobulin, urinary ⁇ 1 microglobulin, urinary ketone bodies, urinary polyamine, urinary 5-hydroxyindole acetate (urine 5-HIAA), GTP, GTP,
- the daily urinary excretion of the urine component can be calculated from the following equation (8) or (9).
- Total amount of urinary excretion in the target analyte [(Amount of creatinine excreted in the daily urine) / (Total creatinine in the test urine)] X (Total amount of the target analyte in the test urine) (8)
- Total amount of urinary excretion in target urine [(Amount of creatinine excreted in urine per day) Z (creatinine concentration in test urine)] X (concentration of component in test urine) (9)
- the method for measuring the amount of creatinine excreted in urine uses a regression equation that shows the correlation between the weight index value and the amount of creatinine excreted in urine within a certain period of time.Therefore, by measuring and calculating the body weight index value, The amount of creatinine excreted in urine can be easily and simply determined.
- the urinary creatinine amount obtained by the method for measuring the amount of creatinine excreted in urine of the first invention is the amount of creatinine excreted in urine within a certain period of time. Even if they differ, it is possible to obtain accurate values of urine volume and excretion of urine components within a certain period of time by a single urine collection, and there is no need to collect urine.
- the second present invention provides a method of multiplying a value obtained by dividing the amount of creatinine excreted in urine obtained by the measuring method of the first present invention by a creatinine concentration in a test urine, and a concentration of a substance to be measured in a test urine.
- This is a urine component measurement method realized by using the calculated values. Therefore, by using the second method of the present invention, the total amount of urine components and the like can be measured easily and easily, and the burden on the subject can be reduced.
- the third invention is a urine component measuring device using the measurement method of the second invention.
- Example 1 the “fixed period” is all “1 day”.
- Fat Par Center S for 5 men in their 20s, 5 women in their 20s, 5 men in their 40s, 5 women in their 40s, 5 men in their 60s, and 5 women in their 60s The lean body mass was measured using —201 (fat measuring device, manufactured by Sekisui Chemical Co., Ltd.). Thereafter, the amount of daily creatinine excreted in urine was calculated using fx-720G (a program calculator, manufactured by Casio) according to the following formula.
- the daily urine output was calculated by multiplying the daily urinary creatinine output obtained in Example 1 by the test urine creatinine output at the time of measurement, and multiplying by the urine output at the measurement.
- Example 1 The daily urinary creatinine excretion obtained in Example 1 was divided by the urinary creatinine concentration in the test urine at the time of measurement, and the result was multiplied by the concentration of the substances shown in Table 1 at the time of measurement to obtain the daily amount. .
- Example 8 The amount of daily creatinine excreted in urine obtained according to Example 5 was measured in the urine creatinine during measurement.
- Example 5 The daily urinary creatinine excretion obtained in Example 5 was divided by the urinary creatinine concentration in the test urine at the time of measurement, and the result was multiplied by the concentration of the substances shown in Table 2 at the time of measurement to obtain the daily amount. .
- the correlation between this value and the value obtained from actual urine storage was calculated and shown in Table 2.
- Omron body fat for 5 men in their 20s, 5 women in their 20s, 5 men in their 40s, 5 women in their 40s, 5 men in their 60s, and 5 women in their 60s The body fat mass was measured using a total HBF 301 (body fat meter, manufactured by OMRON). Thereafter, the amount of daily creatinine excreted in urine was calculated using fx-7200G (program calculator, manufactured by Casio) according to the following formula.
- the daily urine output was determined by multiplying the daily urinary creatinine output determined in Example 9 by the test urine creatinine output at the time of measurement and multiplying by the urine output at the time of measurement.
- the daily urinary glucose was obtained by multiplying the daily urinary creatinine excretion determined in Example 9 by the urinary creatinine concentration in the test urine at the time of measurement and the urinary glucose concentration at the time of measurement.
- Example 9 The daily urinary creatinine excretion determined in Example 9 was divided by the urinary creatinine concentration in the test urine at the time of measurement, and multiplied by the concentration of the substances shown in Table 3 at the time of measurement to determine the daily amount. . The correlation between this value and the value obtained from actual urine collection was calculated and shown in Table 3. W
- Example 13 The daily amount of creatinine excreted in urine per day determined in Example 13 was divided by the concentration of urinary creatinine in the test urine at the time of measurement, and the result was multiplied by the concentration of the substances shown in Table 4 at the time of measurement to determine the daily amount. The correlation between this value and the value obtained by actually storing urine was calculated and shown in Table 4. Table 4 Correlation between target substance and daily urine volume Sodium chloride
- the amount of urinary excreted creatinine within a certain period can be easily obtained by measuring and calculating the weight index value. . For this reason, it is necessary to easily obtain accurate values of urine volume within a certain period of time and excretion amount of urine components, which are indicators of disease detection and health care guidance, within a certain period of time, by collecting urine without collecting urine. Is possible.
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Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18630099A JP2000097937A (ja) | 1998-07-22 | 1999-06-30 | 尿中排泄クレアチニン量及び尿中成分測定方法、並びに装置 |
| AU2000230755A AU2000230755A1 (en) | 2000-01-21 | 2000-01-21 | Method for quantitating creatinine discharged in urine, method for measuring urine component and apparatus therefor |
| EP00900856A EP1258732A4 (en) | 2000-01-21 | 2000-01-21 | METHOD FOR QUANTITATING URINE-DISCRETED CREATINE, METHOD FOR DETERMINING URINE COMPONENTS AND DEVICE THEREFOR |
| CA002397900A CA2397900A1 (en) | 2000-01-21 | 2000-01-21 | Method for quantitating creatinine discharged in urine, method for measuring urine component and apparatus therefor |
| PCT/JP2000/000276 WO2001053838A1 (en) | 1998-07-22 | 2000-01-21 | Method for quantitating creatinine discharged in urine, method for measuring urine component and apparatus therefor |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20662198 | 1998-07-22 | ||
| JP18630099A JP2000097937A (ja) | 1998-07-22 | 1999-06-30 | 尿中排泄クレアチニン量及び尿中成分測定方法、並びに装置 |
| PCT/JP2000/000276 WO2001053838A1 (en) | 1998-07-22 | 2000-01-21 | Method for quantitating creatinine discharged in urine, method for measuring urine component and apparatus therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001053838A1 true WO2001053838A1 (en) | 2001-07-26 |
Family
ID=11735594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2000/000276 Ceased WO2001053838A1 (en) | 1998-07-22 | 2000-01-21 | Method for quantitating creatinine discharged in urine, method for measuring urine component and apparatus therefor |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1258732A4 (ja) |
| AU (1) | AU2000230755A1 (ja) |
| CA (1) | CA2397900A1 (ja) |
| WO (1) | WO2001053838A1 (ja) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9128168B2 (en) | 2007-12-14 | 2015-09-08 | Cornell University | Method of determing excretion of sodium and other analytes |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2522970B2 (ja) * | 1987-11-16 | 1996-08-07 | 栄研化学株式会社 | 体液中のクレアチニン定量用試験片及びその製法 |
| US5385847A (en) * | 1993-12-02 | 1995-01-31 | Miles Inc. | Method for the determination of urinary protein and creatinine |
| US5500372A (en) * | 1994-07-25 | 1996-03-19 | Private Clinic Laboratories Inc. | Method of determining renal clearances |
| US5804452A (en) * | 1995-04-27 | 1998-09-08 | Quidel Corporation | One step urine creatinine assays |
| US5733787A (en) * | 1996-06-17 | 1998-03-31 | Bayer Corporation | Method for the detection of creatinine |
| JP3129250B2 (ja) * | 1997-09-10 | 2001-01-29 | 株式会社ミルス生命科学研究所 | 尿の化学分析方法 |
-
2000
- 2000-01-21 CA CA002397900A patent/CA2397900A1/en not_active Abandoned
- 2000-01-21 EP EP00900856A patent/EP1258732A4/en not_active Withdrawn
- 2000-01-21 AU AU2000230755A patent/AU2000230755A1/en not_active Abandoned
- 2000-01-21 WO PCT/JP2000/000276 patent/WO2001053838A1/ja not_active Ceased
Non-Patent Citations (3)
| Title |
|---|
| MASAMITSU KANAI: "Rinshou kensahou teiyou, the 30th printing", KANEHARA SHUPPAN, 20 August 1993 (1993-08-20), pages 150 - 151, XP002946247 * |
| See also references of EP1258732A4 * |
| SHOUJI SUZUKI: "Igaku daijiten, the 16th printing", NANZANDO, 11 February 1978 (1978-02-11), pages 526, XP002946248 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2397900A1 (en) | 2001-07-26 |
| EP1258732A4 (en) | 2005-02-09 |
| AU2000230755A1 (en) | 2001-07-31 |
| EP1258732A1 (en) | 2002-11-20 |
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