TD-4277 BLOOD GLUCOSE MONITORING SYSTEM, MODEL 4277

K100322 · Taidoc Technology Corporation · NBW · Jun 28, 2010 · Clinical Chemistry

Device Facts

• Record ID: K100322
• Device Name: TD-4277 BLOOD GLUCOSE MONITORING SYSTEM, MODEL 4277
• Applicant: Taidoc Technology Corporation
• Product Code: NBW · Clinical Chemistry
• Decision Date: Jun 28, 2010
• Decision: SESE
• Submission Type: Traditional
• Regulation: 21 CFR 862.1345
• Device Class: Class 2
• Attributes: Pediatric

Indications for Use

TD-4277 Blood Glucose Monitoring System, Model TD-4277 is intended for use in the quantitative measurement of glucose in fresh capillary whole blood from the finger. It is intended for use by healthcare professionals and people with diabetes mellius at home as an aid in monitoring the effectiveness of diabetes control program. It is not intended for the diagnosis of or screening for diabetes mellitus, and is not intended for use on neonates. Professionals may use the test strips to test capillary and venous blood samples, but lay user may not test venous blood samples.

Device Story

System measures glucose in fresh capillary whole blood (fingerstick) or venous blood (professionals only). Uses amperometric technology with glucose dehydrogenase-FAD enzyme; chemical reaction generates electrical current proportional to glucose concentration. Meter displays results; stores up to 1000 measurements; transmits data to PC via USB. Used by patients at home or healthcare professionals in clinical settings. Provides quantitative glucose values to aid diabetes management. Benefits include monitoring effectiveness of diabetes control programs. System includes meter, test strips, control solutions, lancing device, and lancets.

Clinical Evidence

Laboratory and clinical studies performed to validate system performance. No specific numerical metrics (e.g., sensitivity, specificity) provided in summary; states performance meets intended use requirements.

Technological Characteristics

Electrochemical biosensor technology using glucose dehydrogenase. System includes meter, test strips, and control solutions. Class II device (Glucose Test System).

Indications for Use

Indicated for quantitative glucose measurement in fresh capillary whole blood from the finger for people with diabetes mellitus and healthcare professionals. Not for neonates, diagnosis/screening of diabetes, or use on critically ill, shock, dehydrated, hypotensive, or hyperosmolar patients.

Regulatory Classification

Identification

A glucose test system is a device intended to measure glucose quantitatively in blood and other body fluids. Glucose measurements are used in the diagnosis and treatment of carbohydrate metabolism disorders including diabetes mellitus, neonatal hypoglycemia, and idiopathic hypoglycemia, and of pancreatic islet cell carcinoma.

Special Controls

*Classification.* Class II (special controls). The device, when it is solely intended for use as a drink to test glucose tolerance, is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 862.9.

Predicate Devices

• TaiDoc Pro I Glucose Test Strip (k082169)
• FORA G30 blood glucose monitoring system (k090187)

Submission Summary (Full Text)

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

A. 510(k) Number:
k100322

B. Purpose for Submission:
Clearance of a new device

C. Measurand:
Whole blood Glucose

D. Type of Test:
Quantitative (glucose dehydrogenase-FAD)

E. Applicant:
TaiDoc Technology Corporation

F. Proprietary and Established Names:
TD-4277 Blood Glucose Monitoring System, Model 4277

G. Regulatory Information:

1. Regulation section:
21CFR 862.1345-Glucose test system
21CFR 862.1660 Quality control material (assayed and unassayed)

2. Classification:
II, and I, reserved

3. Product code:
NBW System, Test, Blood Glucose, Over the Counter
LFR Glucose Dehydrogenase, Glucose
JJX Single (Specified) Analyte Controls (Assayed and Unassayed)

4. Panel:
75 (Clinical Chemistry)

H. Intended Use:

1. Intended use(s):
See indications(s) for use below

2. Indication(s) for use:
TD-4277 Blood Glucose Monitoring System, Model TD-4277 is intended for use in the quantitative measurement of glucose in fresh capillary whole blood from the finger. It is intended for use by healthcare professionals and people with diabetes mellitus at home as an aid in monitoring the effectiveness of diabetes control program.

It is not intended for the diagnosis of or screening for diabetes mellitus, and is not

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intended for use on neonates.

Professionals may use the test strips to test capillary and venous blood samples, but lay user may not test venous blood samples.

3. Special conditions for use statement(s):
- Not intended for diagnosis or screening of diabetes mellitus
- Not intended for use on neonates
- For in vitro diagnostic use only
- Not for use on critically ill patients, patients in shock, dehydrated patients, hypotensive patients or hyperosmolar patients

4. Special instrument requirements:
TD-4277 Blood Glucose Monitoring System

I. Device Description:
TD-4277 Blood Glucose Monitoring System consists of a blood glucose meter, blood glucose test strips, control solutions, the lancing device, and lancets.

J. Substantial Equivalence Information:
1. Predicate device name(s):
TaiDoc Pro I Glucose Test Strip
FORA G30 blood glucose monitoring system
2. Predicate 510(k) number(s):
k082169, k090187 respectively
3. Comparison with predicate:

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| Item | Predicate device | Predicate device | Proposed device |
| --- | --- | --- | --- |
| Product name | TaiDoc Professional I Glucose Test Strips | FORA G30 blood glucose monitoring system | TD-4277 blood glucose monitoring system |
| Model no | TD-4351 (K082169) | TD-4241 (K090187) | TD-4277 |
| Indication for use | For use in the quantitative measurement of glucose in fresh capillary whole blood. It is intended for use by healthcare professionals and people with diabetes mellitus at home as an aid in monitoring the effectiveness of diabetes control program. | Same | Same |
| Alternative Site Testing | Yes | Yes | No |
| Detection method | Amperometry: measuring a current produced by a chemical reaction | Same | Same |
| Enzyme | Glucose dehydrogenase (FAD) | Glucose oxidase | Glucose dehydrogenase - FAD |
| | | | |
| Power source | n/a | 1 x CR2032 battery (3V) | 2 x 1.5V AAA batteries |
| Temperature compensation | n/a | Automatic compensation with built-in thermistor | Same as FORA G30 predicate |
| Reaction time (sec) | 7 | 5 | 5 |
| Measurement range | 10-600 mg/dL | 20-600 mg/dL | 20-600 mg/dL |
| Test Strip Calibration | n/a | One code function (No Code) | One code function (No Code) |

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| Item | Predicate device | Predicate device | Proposed device |
| --- | --- | --- | --- |
| Product name | TaiDoc Professional I Glucose Test Strips | FORA G30 blood glucose monitoring system | TD-4277 blood glucose monitoring system |
| Model no | TD-4351 (K082169) | TD-4241 (K090187) | TD-4277 |
| Measurement mode | n/a | General, AC, PC and quality control | Same as FORA G30 predicate |
| Special message | n/a | Lo/Hi/Ketone | Same as FORA G30 predicate |
| Memory feature | n/a | 450 measurements | 1000 measurements |
| Power saving | n/a | Auto turn-off after 3 minutes without action | Same as FORA G30 predicate |
| Transmission Function | n/a | Uses RS232 cable to transmit data to computer | Uses USB cable to transmit data to computer |
| Product name | TaiDoc Pro I Glucose Test Strips | FORA G30 blood glucose test strips | TD-4277 blood glucose test strips |
| Reaction time | 7 Sec | 5 sec | 5 sec |
| Sample volume | 0.7μL | 0.5μL | 0.5μL |
| Sample type | Whole blood (capillary and venous) | Whole blood (capillary) | Whole blood (capillary and venous) |

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

- ISO - 15197: In Vitro Diagnostic Test Systems-Requirements For Blood-Glucose Monitoring Systems For Self-Testing In Managing Diabetes Mellitus
- ISO - 14971: Medical Devices - Application Of Risk Management To Medical Devices
- CLSI - Interference Testing in Clinical Chemistry - EP07-A2

# L. Test Principle:

Glucose dehydrogenase assay and amperometric technology is used. The reaction utilizes the enzyme glucose dehydrogenase to catalyze the formation of gluconolactone from the oxidation of glucose whereby two electrons are produced. Through the mechanism of the mediator, electrical current is generated and it is proportional to the quantity of glucose in the sample.

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

1. Analytical performance:

a. Precision/Reproducibility:

Precision includes intermediate precision (day-to-day precision) and repeatability (within-day precision) on three meters. For intermediate

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precision, three level glucose control solutions were used instead of blood specimen to prevent glucose degradation effect (glycolysis), and this evaluation was performed for ten days. Repeatability was performed at 5 levels with spiked venous blood samples as short a period of time (30 minutes) as possible to minimize the effect of glycolysis.

Intermediate Precision

| Control levels | Low (30-50 mg/dL) | | | Normal (96-144 mg/dL) | | | High(280-420 mg/dL) | | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| meter | 1 | 2 | 3 | 1 | 2 | 3 | 1 | 2 | 3 |
| Mean | 44.2 | 43.1 | 43.8 | 132.0 | 133.0 | 132.1 | 338.0 | 338.7 | 336.9 |
| SD | 2.17 | 1.89 | 2.18 | 4.87 | 4.88 | 4.04 | 11.04 | 10.87 | 13.14 |
| CV | 4.91% | 4.38% | 4.98% | 3.69% | 3.67% | 3.06% | 3.27% | 3.21% | 3.90% |
| Overall | | | | | | | | | |
| Mean | | 43.7 | | | 132.3 | | | 337.8 | |
| SD | | 2.12 | | | 4.53 | | | 11.78 | |
| CV | | 4.84% | | | 3.43% | | | 3.49% | |

Repeatability

| Interval levels | 1 (30-50 mg/dL) | | | 2 (51-110 mg/dL) | | | 3 (111-150 mg/dL) | | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| meter | 1 | 2 | 3 | 1 | 2 | 3 | 1 | 2 | 3 |
| Mean | 44.0 | 42.8 | 43.6 | 84.7 | 84.4 | 86.0 | 136.2 | 133.7 | 137.3 |
| SD | 2.05 | 2.06 | 2.06 | 2.82 | 3.24 | 2.75 | 4.99 | 4.37 | 5.06 |
| CV | 4.66% | 4.38% | 4.98% | 3.69% | 3.67% | 3.06% | 3.27% | 3.21% | 3.90% |
| Overall | | | | | | | | | |
| Mean | | 43.5 | | | 85.2 | | | 135.9 | |
| SD | | 2.10 | | | 2.98 | | | 5.03 | |
| CV | | 4.82% | | | 3.50% | | | 3.70% | |

Repeatability (cont.)

| Interval levels | 4 (151-250mg/dL) | | | 5 (251-400 mg/dL) | | |
| --- | --- | --- | --- | --- | --- | --- |
| meter | 1 | 2 | 3 | 1 | 2 | 3 |
| Mean | 222.8 | 219.4 | 220.5 | 381.9 | 385.7 | 381.7 |
| SD | 7.12 | 6.76 | 6.12 | 9.91 | 8.78 | 8.59 |
| CV | 3.20% | 3.08% | 2.78% | 2.60% | 2.28% | 2.25% |
| Overall | | | | | | |
| Mean | | 220.8 | | | 383.0 | |
| SD | | 6.70 | | | 9.15 | |
| CV | | 3.03% | | | 2.39% | |

b. Linearity/assay reportable range:

Testing was conducted using venous blood spiked with D-glucose to provide 11 samples spaced across the range of $<20\mathrm{mg/dL}$ to $>700\mathrm{mg/dL}$ . Testing was conducted using TD-4277 meter with TD-4277 test strips, and YSI-2300 glucose analyzer as the reference method.

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Samples were divided into two aliquots. One aliquot was used to perform on the TD-4277 meter and the second aliquot was analyzed on the YSI. For each level solution, 5 consecutive tests were performed by TD-4277 and YSI each.

Regression analysis calculated in the range 16.8-669 mg/dL is:

Y = 1.0268x - 6.8852

R² 0.9977

The applicant is using this study to support the claimed measuring range of 20-600 mg/dL

c. Traceability, Stability, Expected values (controls, calibrators, or methods):

Control solutions are prepared to fall within each of three levels 35 - 65, 112-168 and 224 -336 and then check against YSI-2300. Acceptance Criteria is if the coefficient of variation (CV%) of each level of control solution is less than 5% in both measurement results by glucose meter, and YSI-2300, and the mean values of the measurement results by a glucose meter is within the specified range of values.

Control open/closed stability claimed is based on real time studies, based on the coefficient of variation (C.V %) for each level of the control solution is less than 5% in measurement results by YSI-2300 and the mean values of the measurement results by a glucose meter is within the specified range of values.

The results demonstrated that the Control Solution (Level 1, 2, 3) are stable for 90 days after opening, and have a shelf-life of 24 months by meeting the acceptance criteria when stored at 36°F to 86°F (2 - 32°C).

The strip storage claims are: 90 days for open vial of strips stored at 2 - 32 °C and 24 months for unopened vials of strips stored at 2 - 32°C.

d. Detection limit:

The measuring range of the system is 20 - 600 mg/dL. This range was verified by the linearity study in section M.1.b above.

e. Analytical specificity:

Seven volunteer subjects were healthy and had not taken medications prior to blood donation. Blood was obtained from the forearm of fasting volunteers and collected in 5-mL lithium EDTA Vacutainers. The high glucose level (300mg/dL) was achieved by adding 10% dextrose solution to the blood pool.

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The below table is from an evaluation of the dose-response relationship where 5 endogenous and exogenous concentrations from therapeutic (physiological) to toxic were performed 4 times each at low (75-85 mg/dL) and high (300 mg/dL) glucose levels. A criterion of $\pm 10\%$ was used as the cutoff for interference.

| Exogenous substance | | | | |
| --- | --- | --- | --- | --- |
| | Therapeutic levels (mg/dL) | Exogenous Test concentration (mg/dL) | Low glucose level (75-85 mg/dL) | High glucose level (300 mg/dL) |
| Acetaminophen | 1-2 | 20 | 10 mg/dL | 10 mg/dL |
| Ascorbic acid | 0.8-1.2 | 3 | No interference up to test concentration | No interference up to test concentration |
| Dopamine | 0.4-1.6 | 13 | 6.25 mg/dL | 3.25 mg/dL |
| L-dopa | 0.02 - 0.28 | 2.8 | 0.7 | 1.4 |
| Methyl-dopa | 0.1 - 0.5 | 2.5 | 1.25 | No interference up to test concentration |

Endogenous substance

| | Physiological levels (mg/dL) | Endogenous Test Concentration (mg/dL) | Low glucose level (75-85 mg/dL) | High glucose level (300 mg/dL) |
| --- | --- | --- | --- | --- |
| Uric acid | 7 | 20 | 15 mg/dL | 20 mg/dL |
| Triglyceride | 190 | 2000 | No interference up to test concentration | No interference up to test concentration |
| Bilirubin | 1.2 | 20 | 20 mg/dL | 20 mg/dL |
| Fructose | 100 | 1000 | No interference up to test concentration | No interference up to test concentration |
| Galactose | 100 | 1000 | No interference up to test concentration | No interference up to test concentration |
| Maltose | 100 | 1000 | No interference up to test concentration | No interference up to test concentration |
| Xylose | 50 | 50 | 50 mg/dL | 50 mg/dL |

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The above table lists the drug concentrations at which interference with glucose measurements was greater than $\pm 10\%$. Most of the concentrations are higher than therapeutic or physiological levels.

There were no significant interferences observed for galactose, maltose and fructose, however, xylose showed a significant interference for concentrations above $50\mathrm{mg/dL}$ in both high and low glucose levels.

No interference was observed in the rest of the interfering substances at therapeutic or physiological levels either at low or high glucose levels.

f. Assay cut-off:
Not Applicable

2. Comparison studies:

a. Method comparison with predicate device:

200 Samples from 35 to $467\mathrm{mg/dL}$ were included. The fresh capillary whole blood samples were from different individuals except those with blood glucose concentration less than $40\mathrm{mg/dL}$ and greater than $400\mathrm{mg/dL}$. For those samples less than $40\mathrm{mg/dL}$ and greater than $400\mathrm{mg/dL}$, a pooled capillary whole blood sample was used instead and spiked to the desired level. The subject device was compared to the YSI.

| Difference distribution for glucose concentration<75mg/dL compared to YSI | | | |
| --- | --- | --- | --- |
| Difference | Difference | Difference | |
| within ±5mg/dL | within ±10mg/dL | within ±15mg/dL | |
| 67% (24/36) | 89% (32/36) | 100% (36/36) | |
| Difference distribution for glucose concentration • 75mg/dL compared to YSI | | | |
| Difference | Difference | Difference | Difference |
| within ±5 % | within ±10 % | within ±15 % | within ±20 % |
| 121/164 (74%) | 147/164 (90%) | 162/164 (99%) | 162/164 (99%) |

The applicant states the data falls within ISO 15197 criteria

Device TD-4277
Y 0.9765x + 3.3248
R 0.9798
N 200
Range 35.75-466.5 mg/dL

Lay User Study

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One hundred and fifty (150) male and female subjects representing typical age ranges and education of predominantly of high school and below, who were able to read the English user manuals, were enrolled in this study at three sites. Test results obtained from lay users are compared to YSI 2300 below.

| Difference distribution for glucose concentration<75mg/dL compared to YSI | | | |
| --- | --- | --- | --- |
| Difference | Difference | Difference | |
| within ±5mg/dL | within ±10mg/dL | within ±15mg/dL | |
| 13/24(54%) | 20/24(83%) | 24/24(100%) | |
| Difference distribution for glucose concentration ≥ 75mg/dL compared to YSI | | | |
| Difference | Difference | Difference | Difference |
| within ±5 % | within ±10 % | within ±15 % | within ±20 % |
| 37/126(29%) | 64/126(49%) | 92/126(75%) | 120/126(95%) |
| Comparison | N | Slope and y-intercept | R² |
| --- | --- | --- | --- |
| Lay user vs. YSI-2300 | 150 | y = 1.0488x + 1.5456 | 0.9743 |
| Professional vs. YSI-2300 | 150 | y = 1.0589x - 2.2164 | 0.9765 |

A survey for the ease of use of the TD-4277 meter was carried out by providing subjects with questionnaires for rating the ease of understanding of the instructions and overall ease of use of the device after they finished the blood glucose tests. $100\%$ of the users had above 3 (neutral) in average rating with a scale of 1-5 for ease of use of the device.

# b. Matrix comparison:

The blood glucose measurement accuracy of the proposed device with venous samples was evaluated. Fresh venous whole blood samples were tested using both TD-4277 and the reference method, YSI-2300 glucose analyzer.

One hundred (100) samples from $24.5 - 579\mathrm{mg / dL}$ were included. The fresh venous whole blood samples were from different individuals except those with blood glucose concentration less than $40\mathrm{mg / dL}$ and greater than $400\mathrm{mg / dL}$ . For those samples less than $40\mathrm{mg / dL}$ and greater than $400\mathrm{mg / dL}$ , a pooled venous whole blood sample was used instead and spiked to the desired level as in the above matrix comparison distribution of samples.

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| Difference distribution for glucose concentration<75mg/dL compared to YSI | | | |
| --- | --- | --- | --- |
| Difference | Difference | Difference | |
| within ±5mg/dL | within ±10mg/dL | within ±15mg/dL | |
| 80% (16/20) | 80% (16/20) | 95% (19/20) | |
| Difference distribution for glucose concentration ≥ 75mg/dL compared to YSI | | | |
| Difference | Difference | Difference | Difference |
| within ±5 % | within ±10 % | within ±15 % | within ±20 % |
| 43%(34/80) | (80%(64/80) | 93%(74/80) | 95%(76/80) |

The applicant states the data falls within ISO 15197 criteria

Device TD-4277

Y 1.0106x + 4.2515

R² 0.9899

N 100

Range 24.3-579 mg/dL

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):

Not Applicable

4. Clinical cut-off:

Not Applicable

5. Expected values/Reference range:

Reference values:

Time of day Normal plasma glucose range for people without diabetes

Fasting and before meal Less than 100 mg/dL (5.6 mmol/L)

2 hours after meals Less than 140 mg/dL (7.8 mmol/L)

Source: American Diabetes Association (2008). Clinical Practice Recommendations. Diabetes Care, 31 (Supplement 1): S1-108.

N. Instrument Name:

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TD-4277 Blood Glucose Meter

# O. System Descriptions:

1. Modes of Operation:

Does the applicant’s device contain the ability to transmit data to a computer, webserver, or mobile device?:

☑ Yes ☐ X or No

Does the applicant’s device transmit data to a computer, webserver, or mobile device using wireless transmission?:

☐ Yes ☐ X or No

2. Software:

FDA has reviewed applicant’s Hazard Analysis and software development processes for this line of product types:

☑ Yes ☐ X or No

3. Specimen Identification:

Time, date and mode of testing (general, post meal, 8 hours with no food intake and control solutions)

4. Specimen Sampling and Handling:

Fingerstick capillary and venous blood samples, but lay user may not test venous blood samples.

5. Calibration:

One code function (No Code)

6. Quality Control:

The meter stores QC results on the meter

Control material is included in the meter kit and the three levels are available separately and instructions are provided as to when control testing should be done.

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P. Other Supportive Instrument Performance Characteristics Data Not Covered In The "Performance Characteristics" Section above:

The data management software used to acquire the data from the proposed device was cleared, under k070941. Ease of use in data transmission from a blood glucose meter to a PC has been validated in both the submissions of the data management software and the predicate device, FORA G30 BLOOD GLUCOSE MONITORING SYSTEM (K090187) and the method of setting up and transmission in the subject device are the same as the predicate device. The sponsor provided an acceptable report for the data accuracy for change from RS-232 to USB connection.

The sponsor conducted the FleschKincaid readability assessment of the User Manual and obtained a grade level score equivalent to an average student in 8th grade reading level. The test strip and control solution package inserts have a 7th grade reading level.

Hematocrit Study:

To test accuracy due to the hematocrit effect, venous blood samples were collected in an anti-coagulant (Li-EDTA) vacuum tube, and glucose levels were adjusted to the following ranges; 10-20 mg/dL, 20-50 mg/dL, 50-100 mg/dL, 100-200 mg/dL, 200-350 mg/dL, 350-450 mg/dL, 450-550 mg/dL, and 600-700 mg/dL. Samples were then adjusted to hematocrit levels of 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, and 65%. The YSI 2300 was used as the reference method. The results of the hematocrit study were reviewed and found to be acceptable for 20% to 60% hematocrit.

Q. Proposed Labeling:

The labeling is sufficient and it satisfies the requirements of 21 CFR Part 809.10.

R. Conclusion:

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