← Product Code [JIO](/submissions/HE/subpart-g%E2%80%94manual-hematology-devices/JIO) · K040703

# URISTIK H SERIES REAGENT STRIPS FOR URINALYSIS (K040703)

_Dirui Industrial Co., Ltd. · JIO · Aug 26, 2004 · Hematology · SESE_

**Canonical URL:** https://fda.innolitics.com/submissions/CH/subpart-g%E2%80%94manual-hematology-devices/JIO/K040703

## Device Facts

- **Applicant:** Dirui Industrial Co., Ltd.
- **Product Code:** [JIO](/submissions/HE/subpart-g%E2%80%94manual-hematology-devices/JIO.md)
- **Decision Date:** Aug 26, 2004
- **Decision:** SESE
- **Submission Type:** Traditional
- **Regulation:** 21 CFR 864.6550
- **Device Class:** Class 2
- **Review Panel:** Hematology

## Indications for Use

URISTIK H Series Reagent Strips provide qualitative and semi-quantitative tests for ketones (acetoacetic acid), blood, protein, nitrite, ascorbic acid, pH, specific gravity, leukocytes, glucose, bilirubin, and urobilinogen in urine. Test results may provide information regarding the status of carbohydrate metabolism, kidney and liver function, acid-base balance and bacteriuria. Dirui H Series Reagent Strips are for single use in professional near-patient (point-of-care) and centralized laboratory locations. The strips are intended for use in screening for the following areas: Kidney function; Urinary tract infections; Carbohydrate metabolism (e.g. diabetes mellitus); Liver function; Acid-base balance; Urine concentration. Test results can be used along with other diagnostic information to rule out certain conditions and to determine if microscopic analysis is needed.

## Device Story

URISTIK H Series Reagent Strips are firm plastic, dry reagent strips for qualitative/semi-quantitative urinalysis. Input: urine sample applied to reagent pads. Principle: chemical reactions (e.g., glucose oxidase/peroxidase for glucose; peroxidase activity for blood) produce color changes on pads. Output: visual color comparison against chart or instrumental reading via Dirui H-50, H-100, or H-500 Urine Analyzers. Used in hospitals, clinics, and labs by professional staff. Results available within one minute; assists diagnosis of metabolic, renal, and hepatic status; aids in screening for bacteriuria and acid-base balance.

## Clinical Evidence

Clinical laboratory studies conducted by professional users in centralized and point-of-care settings. Performance evaluated by comparing visual and instrumental (Dirui H Series Analyzers) readings of URISTIK H strips against Bayer MULTISTIX 10 SG strips and standard laboratory methods. Results demonstrated that professional users can obtain valid, consistent urinalysis test results comparable to the predicate device.

## Technological Characteristics

Firm plastic dry reagent strips; colorimetric chemical reaction principle. Analyte detection via spectrophotometric analysis (525nm, 620nm, 660nm) when used with Dirui H-50, H-100, or H-500 analyzers. Connectivity via RS-232 port. Calibration performed using a dedicated calibration strip. Software-controlled analysis with 1,000-result memory capacity.

## Regulatory Identification

An occult blood test is a device used to detect occult blood in urine or feces. (Occult blood is blood present in such small quantities that it can be detected only by chemical tests of suspected material, or by microscopic or spectroscopic examination.)

## Special Controls

*Classification.* Class II (special controls). A control intended for use with an occult blood test is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 864.9.

## Predicate Devices

- Bayer Corporation MULTISTIX 10 SG Regent Strips
- Behring Diagnostics Rapignost Total Screen L Urine Test Strips (k861255)
- Boehringer Mannheim Chemstrip 10 with SG Urine Test Strips (k896454)
- International Newtech Development Urinalysis Reagent Strips (10 parameters) (k993850)

## Submission Summary (Full Text)

> This content was OCRed from public FDA records by [Innolitics](https://innolitics.com). If you use, quote, summarize, crawl, or train on this content, cite Innolitics at https://innolitics.com.
>
> Innolitics is a medical-device software consultancy. We help companies design, build, and clear FDA-regulated software and AI/ML devices, including [a 510(k)](https://innolitics.com/services/510ks/), [a De Novo](https://innolitics.com/services/regulatory/), [a SaMD](https://innolitics.com/services/end-to-end-samd/), [an AI/ML medical device](https://innolitics.com/services/medical-imaging-ai-development/), or [an FDA regulatory strategy](https://innolitics.com/services/regulatory/).

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# 510(k) SUBSTANTIAL EQUIVALENCE DETERMINATION DECISION SUMMARY DEVICE AND INSTRUMENT TEMPLATE

A. 510(k) Number:
k040703

B. Purpose for Submission:
Premarket Notification 510(k) of intention to manufacture and market the Dirui Industrial Co. Ltd. Uristik H Series Reagent Strips for Urinalysis.

C. Analyte:
Urine Urobilinogen, Bilirubin, Ketone (acetoacetic acid), Blood, Protein, Nitrite, Leukocytes, Glucose, Specific Gravity, pH, and Ascorbic Acid.

D. Type of Test:
Qualitative and semi-quantitative urinalysis.

E. Applicant:
Dirui Industrial Co. Ltd.
95 Yunhe Street
New & High Technology Development Zone
Changchun, 130012, China

F. Proprietary and Established Names:
URISTK H Series Reagent Strips for Urinalysis.

G. Regulatory Information:
1. Regulation section:

|  Classification Name | Product Code | Panel Name | Device Class | Regulation Number  |
| --- | --- | --- | --- | --- |
|  Blood occult, colorimetric, in urine | JIO | 82 Hematology | II | 21 CFR §864.6550  |
|  Urinary glucose (non-quantitative) test system | JIL | 75 Chemistry | II | 21 CFR §862.1340  |
|  Classification Name | Product Code | Panel Name | Device Class | Regulation Number  |
| --- | --- | --- | --- | --- |
|  Urinary urobilinogen (non-quantitative) test system | CDM | 75 Chemistry | I | 21 CFR §862.1785  |

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|  Urinary bilirubin and its conjugates (non-quantitative) test system | JJB | 75 Chemistry | I | 21 CFR §862.1115  |
| --- | --- | --- | --- | --- |
|  Ketones (non-quantitative) test system | JIN | 75 Chemistry | I | 21 CFR §862.1435  |
|  Urinary protein or albumin (non-quantitative) test system | JIR | 75 Chemistry | I | 21 CFR §862.1645  |
|  Nitrite (non-quantitative) test system | JMT | 75 Chemistry | I | 21 CFR §862.1510  |
|  Test, Urine Leukocyte | LJX | 82 Hematology | I | 21 CFR §864.7675  |
|  Urinary pH (non-quantitative | CEN | 75 Chemistry | I | 21 CFR §862.1550  |
|  Ascorbic acid test system | JMA | 75 Chemistry | I | 21 CFR §862.1095  |
|  Refractometer for clinical use | JRE | 75 Chemistry | I | 21 CFR §862.2800  |
|  Automated urinalysis system | KQO | 75 Chemistry | I | 21 CFR §862.2900  |

## H. Intended Use:

1.  Intended use(s):

The URISTIK H Series Urinalysis Reagent Strips for Urinalysis provide qualitative and semi-quantitative test for ascorbic acid, pH, specific gravity, ketones, blood, protein, nitrite, leukocytes, glucose, bilirubin, and urobilinogen in urine. Test results may provide information regarding the status of carbohydrate metabolism, kidney and liver function, acid-base balance, and bacteria.

2.  Indication(s) for use:

The URISTIK H Series Urinalysis Reagent Strips for Urinalysis provide qualitative and semi-quantitative test for ascorbic acid, pH, specific gravity, ketones, blood, protein, nitrite, leukocytes, glucose, bilirubin, and urobilinogen in urine. Test results may provide information regarding the status of carbohydrate metabolism, kidney and liver function, acid-base balance, and bacteria.

Dirui H Series Reagent Strips are for single use in professional near-patient (point-of-care) and centralized laboratory locations. The strips are intended for use in screening at-risk patients to assist diagnosis in the following areas:

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- Kidney function
- Urinary tract infections
- Carbohydrate metabolism (e.g. diabetes mellitus)
- Liver function
- Acid-base balance
- Urine concentration

The results can be used along with other diagnostic information to rule out certain disease states and to determine if microscopic analysis is needed.

3. Special condition for use statement(s):

For prescription use

4. Special instrument Requirements:

The URISTIK H-8, H-10, and H-11 Reagent Strips are intended for use on the Dirui H-50, H-100 or H-500 Urine Analyzers only.

Summary of Dirui H-50, H-100, and H-500 Urine Analyzers

|  Type of Strip | For Urine Analyzer | Available Tests  |
| --- | --- | --- |
|  H-8 | Dirui H-100 | Urobilinogen, Bilirubin, Ketone (acetoacetic acid), Blood, Protein, Nitrite, Glucose, pH  |
|  H-10 | Dirui H-50, H-100, and H-500 | Urobilinogen, Bilirubin, Ketone (acetoacetic acid), Blood, Protein, Nitrite, Leukocytes, Glucose, Specific Gravity, pH  |
|  H-11 | Dirui H-100 and H-500 | Urobilinogen, Bilirubin, Ketone (acetoacetic acid), Blood, Protein, Nitrite, Leukocytes, Glucose, Specific Gravity, pH, and Ascorbic Acid  |

I. Device Description:

The URISTIK H Series Reagent Strips for Urinalysis provide qualitative and semi-quantitative test for Urobilinogen, Bilirubin, Ketone (acetoacetic acid), Blood, Protein, Nitrite, Leukocytes, Glucose, Specific Gravity, pH, and Ascorbic Acid in urine. The URISTIK H Series Reagent Strips for Urinalysis are firm plastic, dry reagent strips impregnated with chemicals. The reagent areas are dipped into the urine sample and read visually according to a color chart or are read instrumentally with a Dirui H-50, H-100, or H-500 Urine Analyzer. The results are available within one minute. To obtain optimal results, it is necessary to use fresh, well mixed and uncentrifuged urine.

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# J. Substantial Equivalence Information:

1. Predicate device name(s):

Bayer Corporation MULTISTIX 10 SG Regent Strips
Behring Diagnostics Rapignost Total Screen L Urine Test Strips (k861255)
Boehringer Mannheim Chemstrip 10 with SG Urine Test Strips (k896454)
International Newtech Development Urinalysis Reagent Strips (10 parameters)
(k993850)

2. Predicate K number(s): See J. 1 above

3. Comparison with predicate:

Similarities and Differences between Urinalysis Test Strips

|  Area of Comparison | Dirui URISTIK H-11 | Bayer Multistix 10 SG | Behring Rapignost Total Screen L | Boehringer Mannheim Chemstrip 10 with SG | International Newtech Urinalysis Reagent Strips  |
| --- | --- | --- | --- | --- | --- |
|  Intended Use | Professional use in point-of-care urine testing | Same | Same | Same | Same  |
|  Target Population | Patients of physicians, hospitals, and clinics | Same | Same | Same | Same  |
|  Test Principles | Established clinical chemistry methods | Same for all tests | Same for all tests | Same for all tests | Same for all tests  |
|  Area of Comparison | Dirui URISTIK H-11 | Bayer Multistix 10 SG | Behring Rapignost Total Screen L | Boehringer Mannheim Chemstrip 10 with SG | International Newtech Urinalysis Reagent Strips  |
|  Test reagents | Ingredients that change color in reaction with analytes | X | Different ingredients or percentages for glucose, protein, ketones, blood, nitrite, | Different ingredients or percentages for glucose, protein, ketones, blood, bilirubin, | Different ingredients or percentages for nitrite, pH, specific gravity tests  |

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|   |  |  | leukocytes, urobilinogen, pH tests | nitrite, urobilinogen, pH, specific gravity tests |   |
| --- | --- | --- | --- | --- | --- |
|  Sensitivity | Trace or clinically low levels of analytes | X | Unspecified for ascorbic acid and leukocytes, different units for all other tests | Not compared | Different units for blood, same units and levels for all other tests  |
|  Output values | Negative and 2 to 6 positive values | X | Negative and 1 to 6 positive values | Not compared | Negative an 1 to 6 positive values  |

K. Standard/Guidance Document Referenced (if applicable):

None Referenced

L. Test Principle:

Protein - The test is based on the protein-error-of-indicators principle. An ion in the specific pH indicator attracted by cation on the protein molecule makes the indicator further ionized, which changes its color.

Glucose - The assay for glucose is based on the glucose-specific glucose oxidase/peroxidase method. Oxidation of glucose forms hydrogen peroxide, which in turn oxidizes a chromogen in the peroxidase reaction to generate a green or blue color.

Blood - The assay for blood is based on the peroxidase activity of hemoglobin and myoglobin creating a green color with oxidation of a chromogen. Intact erythrocytes which hemolyze on the test paper will produce a green dot.

Ketones - The acetoacetate and sodium nitroprusside cause a reaction in the alkaline medium, which produces a violet color.

Leukocytes - Granulocyte leukocytes in urine contain esterase that catalyze the hydrolysis of the pyrrole amino acid ester to liberate 3-hydro-5-phenyl pyrrole. This pyrrole reacting with diazonium forms a purple color.

Nitrite - Nitrite in the urine and aromatic amino sulphanilamide are diazotized to form a diazonium compound. The diazonium compound reacting with tetrahydro benzo(h) quinolin 3-phenol causes the color change.

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Specific Gravity - Electrolyte  $(\mathbf{M}^{+}\mathbf{X}^{-})$  in the form of salt in urine reacts with poly methyl vinyl ether and maleic acid (-COOH), which is a weak acid ionic exchanger. The reaction produces hydrogenous ionogen, which reacts with a pH indicator that causes a color change.

pH - This test is based on a double indicator principle that gives a broad range of colors covering the entire urinary pH range.

Bilirubin - The direct bilirubin and dichlorobenzene diazonium produce azo dyes n a strongly acid medium.

Urobilinogen - Urobilinogen and diazonium produce pink azo dyes under the function of strong acid medium.

Ascorbic acid - Ascorbic acid, with 1,2-dihydroxy alkenes, under the alkaline condition, deoxidizes the blue 2, 6-dichloroindophenolate into colorless N-(p-phenol)-2,6-dichloro-p-amine phenol.

## M. Performance Characteristics (if/when applicable):

### 1. Analytical performance:

#### a. Precision/Reproducibility

Bio-Rad Urinalysis Control, Level 1 and Level 2 were used in the precision study. The same lot number of urinalysis control and lot number of reagent strips were used in this study. Two runs per day were performed for 10 days. All three reagent strips (H11, H10, H8) were repeated 10 times. The results of each reagent strip type, for the same read mode (pad) and urinalysis control were the same. The following data for H11 reagent strips read with the H-100 urine analyzer is representative. The results for the same pads on the H10 and H8 reagent strips were the same.

The performance characteristics of the strips are determined by clinical analysis and study. The results for visual readings and instrument readings represent an actual range of analyte concentrations. The following table shows the  $\pm 1$  color block  $\%$  agreement using 1599 samples in laboratory comparison studies between Uristik H Series Reagent Strips and Bayer Multistix 10 SG Reagent Strips.

|  Analyte | % Agreement | Analyte | % Agreement  |
| --- | --- | --- | --- |
|  Urobilinogen | 95.1% 1520/1599 | Bilirubin | 96.3% 1540/1599  |
|  Ketone | 96.6% 1544/1599 | Blood | 96.8% 1548/1599  |
|  Protein | 95.4% 1526/1599 | Nitrite | 97.6% 1561/1599  |
|  Leukocytes | 97.2% 1544/1599 | Glucose | 97.4% 1558/1599  |
|  pH | 92.4% 1478/1599 | Specific Gravity | 92.7% 1482/1599  |

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# b. Linearity/assay reportable range:

Uristik H Series Reagent Strips are qualitative and semi-quantitative. The methodology references are NCCLS EP9-A2 and NCCLS EP 10-A. The strips give results over a small range of concentration of each analyte. For a weak positive laboratory assay, the strips may give negative results because of low sensitivity.

The laboratory assay ranges include the output values of Uristik H Series Reagent Strips. The following table is the assay laboratory range for each analyte in the linearity study.

|  Analyte | Unit | Lab Assay Range | Reportable Range  |
| --- | --- | --- | --- |
|  Urobilinogen | μmol/L | 0.2-300 | 3.3-131  |
|  Bilirubin | μmol/L | 0-313 | 0-100  |
|  Ketone | mmol/L | 0.02-35 | 0-16  |
|  Blood | Ery/μL | 0-350 | 0-200  |
|  Protein | g/L | 0.003-50 | 0-200  |
|  Nitrite | μmol/L | 1.0-400 | Neg-Pos  |
|  Leukocytes | Leu/μL | 0-800 | 0-500  |
|  Glucose | mmol/L | 0-300 | 0-110  |
|  Specific Gravity |  | 1.000-1.040 | 1.000-1.030  |
|  pH |  | 0-14.0 | 5.0-9.0  |
|  Ascorbic Acid | mmol/L | 0.1-14.0 | 0-6.0  |

c. Traceability (controls, calibrators, or method): Not Provided

d. Detection limit:

Sensitivity was demonstrated to the lowest reporting block. See b. above

e. Analytical specificity:

Twenty five common drug components were tested for interferents. The only components having significant effects that were large enough to affect the test results were a high level of ketones ( $\geq 1.0 \, \text{mmol/L}$ ) and an abnormally high level of ascorbic acid ( $\geq 5 \, \text{mmol/L}$ ). These components may cause false negative or lower positive results. High levels of ketones and ascorbic acid are listed as interferences in the labeling.

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# Interference List

|  Urine and Common Drug Components | Amount Not Affecting URISTIK H Series Test  |
| --- | --- |
|  Albumin | 800 mg/dL  |
|  Ascorbic Acid | 20 mg/dL  |
|  Hemoglobin^{1} | 50 mg/dL  |
|  Citric Acid | 50 mg/dL  |
|  Bilirubin | 3.0 mg/dL  |
|  Creatine | 8 mg/dL  |
|  Acetoacetate Acid | 1 mmol/L  |
|  Ammonium Chloride | 189 mg/dL  |
|  Calcium Chloride | 50 mg/dL  |
|  Creatinine | 800 mg/dL  |
|  Glucose^{2} | 2000 mg/dL  |
|  Glycine | 1000 mg/dL  |
|  KCL | 550 mg/dL  |
|  NaCl | 2800 mg/dL  |
|  Oxalic Acid | 70 mg/dL  |
|  Sodium Acetate | 1200 mg/dL  |
|  Sodium Bicarbonate | 1500 mg/dL  |
|  Sodium Nitrate | 0.26 mg/dL  |
|  Sodium Nitrite | 0.3 mg/dL  |
|  Sodium Phosphate | 16 mg/dL  |
|  Urobilinogen | 3.0 mg/dL  |
|  Urea | 3000 mg/dL  |
|  Riboflavin | 100 mg/L  |
|  Theophylline | 100 mg/L  |
|  Phenolphthalein | 1200 mg/L  |

1. The affect on only glucose reagent shown.
2. The affect on only blood reagent shown.

f. Assay cut-off:
Not Applicable

2. Comparison studies:
a. Method comparison with predicate device:

When the urine samples were tested with the Uristik H 11 Reagent Strips for urinalysis, the samples were also tested with the predicate Bayer 10 SG Reagent Strip for Urinalysis. Results were read by urine analyzers and visually. The results are listed in the table below.

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# H11 Compared to Bayer 10 SG Reagent Strips For Urinalysis Both Read With Urine Analyzer

|  Analyte | Agreement Total | % Agreement within ± 1 color block | Analyte | Agreement Total | % Agreement within ± 1 color block  |
| --- | --- | --- | --- | --- | --- |
|  Glucose | 1620/1661 | 97.5 | Protein | 1620/1661 | 97.5  |
|  Blood | 1610/1661 | 96.9 | Ketone | 1606/1661 | 96.7  |
|  Leukocytes | 1616/1661 | 97.3 | Urobilinogen | 1582/1661 | 95.2  |
|  Nitrite | 1623/1661 | 97.7 | Bilirubin | 1602/1661 | 96.4  |
|  pH | 1549/1661 | 93.3 | Specific Gravity | 1543/1661 | 92.9  |

# H11 Compared to Bayer 10 SG Reagent Strips For Urinalysis Both Read Visually

|  Analyte | Agreement Total | % Agreement within ± 1 color block | Analyte | Agreement Total | % Agreement within ± 1 color block  |
| --- | --- | --- | --- | --- | --- |
|  Glucose | 1604/1661 | 96.6 | Protein | 1614/1661 | 97.2  |
|  Blood | 1604/1661 | 96.6 | Ketone | 1610/1661 | 96.9  |
|  Leukocytes | 1613/1661 | 97.1 | Urobilinogen | 1572/1661 | 94.7  |
|  Nitrite | 1605/1661 | 96.6 | Bilirubin | 1605/1661 | 96.6  |
|  pH | 1536/1661 | 92.5 | Specific Gravity | 1530/1661 | 92.1  |

b. Matrix comparison: Not Applicable

3. Clinical studies:
a. Clinical sensitivity: Not Applicable
b. Clinical specificity: Not Applicable
c. Other clinical supportive data (when a and b are not applicable):

4. Clinical cut-off: Not Applicable

5. Expected values/Reference range:

Expected Values are referenced to European Urinalysis Guidelines, The Clinical Analysis Of Urine Recent Period Compendium – Urinalysis With Test Strips [2, 4, 5].

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2. "European Urinalysis Guidelines", The Scandinavian Journal of Clinical & Laboratory Investigation, Scand J Clin Lab Invest-Vol. 60-Supplement 231.2000.

4. "The Clinical Analysis of Urine Recent Period", The Science and Technology Publishing House, Yu Long Cong, Jun Long Ma, Editor's; 1998; pp. 37-81, 96-97.

5. "Compendium- Urinalysis With Test Strips" Roche Diagnostics, Combur® Reagent Strips.

## N. Instrument Name:

Dirui Industrial Co., Ltd    H- 50 Urine Analyzer
Dirui Industrial Co., Ltd    H-100 Urine Analyzer
Dirui Industrial Co., Ltd    H-500 Urine Analyzer

## O. System Descriptions:

1. Modes of Operation:
Semi-automatic – must manually place reagent strips on strip table.

2. Software:
RS-232 Port communication connection
FDA has reviewed applicant’s Hazard Analysis and software development processes for this line of product types:
Yes ☑ or No ☐

3. Sample Identification:
Data Memory - will store 1,000 patient results

4. Specimen Sampling and Handling:
Test Speed - fast mode 120 specimens per hour
- slow mode 60 specimens per hour

5. Assay Types:
Qualitative and semi-quantitative

6. Reaction Types:
Spectrophotometric readings at 525nm 620nm and 660nm

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7. Calibration:

Calibration Strip – The calibration strip that comes with the analyzer has the function of calibrating the urine analyzer, so that you get the correct test results. When the calibration results are the same after comparison, the urine analyzer has passed the calibration, it can be used normally. When the calibration results are not the same, the calibration has failed, and you must contact the supplier.

8. Quality Control:

Quality control monitoring is recommended and should be conducted under the following conditions:

- before daily use
- whenever new test strips are opened
- when there is a different operator
- whenever you suspect erroneous results

P. Other Supportive Instrument Performance Characteristics Data Not Covered In The "L. Performance Characteristics" Section Of The SE Determination Decision Summary:

Q. Conclusion:

The submitted material in this premarket notification is complete and supports a substantial equivalence decision.

---

**Source:** [https://fda.innolitics.com/submissions/CH/subpart-g%E2%80%94manual-hematology-devices/JIO/K040703](https://fda.innolitics.com/submissions/CH/subpart-g%E2%80%94manual-hematology-devices/JIO/K040703)

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