ARCHITECT B12

K121314 · Abbott Laboratories · CDD · May 17, 2012 · Clinical Chemistry

Device Facts

• Record ID: K121314
• Device Name: ARCHITECT B12
• Applicant: Abbott Laboratories
• Product Code: CDD · Clinical Chemistry
• Decision Date: May 17, 2012
• Decision: SESE
• Submission Type: Traditional
• Regulation: 21 CFR 862.1810
• Device Class: Class 2

Intended Use

The ARCHITECT B12 assay is a chemiluminescent microparticle Intrinsic Factor assay for the quantitative determination of vitamin B12 in human serum and plasma on the ARCHITECT i System. Measurements obtained by this device are used in the diagnosis and treatment of anemias of gastrointestinal malabsorption. The ARCHITECT B12 Calibrators are used to calibrate the ARCHITECT i System when the system is used for the quantitative determination of vitamin B12 in human serum and plasma using the ARCHITECT B12 Reagent Kit. The ARCHITECT B12 Controls are used for the estimation of test precision and the detection of systematic analytical deviations of the ARCHITECT i System when used for the quantitative determination of vitamin B12 in human serum and plasma when using the ARCHITECT B12 Reagent Kit.

Device Story

The ARCHITECT B12 assay is a two-step chemiluminescent microparticle immunoassay (CMIA) performed on the ARCHITECT i System. It uses intrinsic factor-coated microparticles to capture vitamin B12 from human serum or plasma samples. The process includes automated sample pretreatment using sodium hydroxide, potassium cyanide, alpha monothioglycerol, and cobinamide dicyanide to release B12 from binding proteins. An acridinium-labeled conjugate is used for detection. The system is operated by laboratory professionals in a clinical setting. The output is a quantitative concentration of vitamin B12 (pg/mL), which clinicians use to diagnose and monitor anemias related to gastrointestinal malabsorption.

Clinical Evidence

Bench testing only. A 20-day precision study (CLSI EP5-A2) on lithium heparin plasma panels demonstrated total imprecision of ≤ 10% CV. A tube type comparison study (CLSI EP7-A2) with 63 donors compared lithium heparin plasma separator tubes to plastic serum tubes; the median difference was 3.3% (95% CI: 2.2%, 4.7%), falling within the 10% allowable difference criteria. Passing-Bablok regression showed high correlation (r ≥ 0.997) between tube types.

Technological Characteristics

CMIA technology; automated two-step assay. Reagents include intrinsic factor (porcine) coated microparticles, acridinium-labeled conjugate, and pre-treatment reagents (NaOH, KCN, alpha monothioglycerol, cobinamide dicyanide). Platform: ARCHITECT i System. Calibration range: 0-2,000 pg/mL. Measuring interval: 146-2,000 pg/mL. Connectivity: Integrated with ARCHITECT i System. Software: Embedded firmware for instrument control and data processing.

Indications for Use

Indicated for the quantitative determination of vitamin B12 in human serum and plasma to aid in the diagnosis and treatment of anemias of gastrointestinal malabsorption.

Regulatory Classification

Identification

A vitamin B12 test system is a device intended to measure vitamin B12 in serum, plasma, and urine. Measurements obtained by this device are used in the diagnosis and treatment of anemias of gastrointestinal malabsorption.

Submission Summary (Full Text)

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# KI21314

# MAY 1 7 2012

## 510(k) Summary (Summary of Safety and Effectiveness)

This summary of the 510(k) safety and effectiveness information is being submitted in accordance with the requirements of SMDA 1990 and 21 CFR 807.92.

# 1. Applicant Name

Darla Abano, Regulatory Affairs Project Manager Regulatory Affairs Abbott Laboratories Diagnostics Division Dept 9V6, AP5N-2 100 Abbott Park Road Abbott Park, IL 60064

#### 2. Device Name

#### Reagents

Classification Name: Vitamin B12 test system Trade Name: ARCHITECT B12 Common Name: B12 Governing Regulation: 862.1810 Device Classification: Class II Classification Panel: Clinical Chemistry Product Code: CDD

#### Calibrators

Classification Name: Calibrator Trade Name: ARCHITECT B12 Calibrators (A-F) Common Name: Calibrator Governing Regulation: 862.1150 Device Classification: Class II Classification Panel: Clinical Chemistry · Product Code: JIT

#### Controls

Classification Name: Quality Control Material (assayed and unassayed) Trade Name: ARCHITECT B12 Controls (Low, Medium, and High) Common Name: Control Governing Regulation: 862.1660 Device Classification: Class I Classification Panel: Clinical Chemistry Product Code: JJX

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# 3. Predicate Device

Abbott ARCHITECT B12 (k110579).

# 4. Intended Use of Device

The ARCHITECT B12 assay is a chemiluminescent microparticle Intrinsic Factor assay for the quantitative determination of vitamin B12 in human serum and plasma on the ARCHITECT i System.

### 5. Description of Device

The ARCHITECT B12 assay is a two-step assay with an automated sample pretreatment, for determining the presence of B12 in human serum and plasma using chemiluminescent microparticle immunoassay (CMIA) technology with flexible assay protocols, referred to as Chemiflex.

# ARCHITECT B12 Reagent Kit

The ARCHITECT B12 Reagent Kit consists of 100 (1 x 100) or 500 (1 x 500) tests. Each kit contains 1 bottle each of the following reagents:

- ARCHITECT B12 Microparticles 1 bottle (6.6 mL per 100-test bottle/27.0 mL per . 500-test bottle) intrinsic factor (porcine) coated microparticles in borate buffer with protein (bovine) stabilizers. Minimum Concentration: 0.1% solids. Preservative: antimicrobial agents.
- ARCHITECT B12 Conjugate 1 Bottle (5.9 mL per 100-test bottle/26.3 mL per . 500-test bottle) B12 acridinium-labeled conjugate in MES buffer. Minimum concentration: 0.7 ng/mL. Preservative: ProClin 300.
- ARCHITECT B12 Assay Diluent 1 Bottle (10.0 mL per 100-test bottle/51.0 mL . per 500-test bottle) B12 Assay Diluent containing borate buffer with EDTA. Preservative: antimicrobial agents.
- ARCHITECT B12 Pre-Treatment Reagent 1 1 Bottle (27.0 mL per 100-test � bottle/50.4 mL per 500-test bottle) B12 Pre-Treatment Reagent 1 containing 1.0 N sodium hydroxide with 0.005% potassium cyanide.
- ARCHITECT B12 Pre-Treatment Reagent 2 1 Bottle (5.5 mL per 100-test . bottle/25.9 mL per 500-test bottle) B12 Pre-Treatment Reagent 2 containing alpha monothioglycerol and EDTA.

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- ARCHITECT B12 Pre-Treatment Reagent 3 1 Bottle (5,5 mL per 100-test bottle/25.9 mL per 500-test bottle) B12 Pre-Treatment Reagent 3 containing cobinamide dicyanide in borate buffer with protein (avian) stabilizers. Preservative: sodium azide.
## ARCHITECT B12 Calibrator Kit

Each ARCHITECT B12 Calibrator Kit contains 6 Bottles (4 mL each) of ARCHITECT B12 Calibrators (1 bottle each of Calibrators A – F). Preservative: sodium azide. Calibrator A contains borate buffer with protein stabilizer (human albumin). Calibrators B – F contain gravimetrically prepared cyanocobalamin in borate buffer with protein stabilizer (human albumin). Calibrators have the following approximate concentrations: 0, 110, 250, 500, 1000, and 2000 pg/mL.

# ARCHITECT B12 Control Kit

Each ARCHITECT B12 Control Kit contains 3 bottles (8 mL each) of ARCHITECT B12 Controls (1 bottle of low control, 1 bottle of medium control, and 1 bottle of high control). Preservative: sodium azide. The Low and High Controls (Control L and Control H) contain cyanocobalamin in borate buffer with protein stabilizer (human albumin). The Medium Control (Control M) contains cyanocobalamin in human serum. Controls have the following approximate concentrations: Low Control, 251 pg/mL; Medium Control, 454 pg/mL; and High Control, 915 pg/mL.

#### 6. Comparison of Technological Characteristics

The ARCHITECT B12 assay utilizes chemiluminescent microparticle immunoassay (CMIA) technology for the quantitative determination of vitamin B12 in human serum and plasma. The Abbott ARCHITECT B12 (LN7K61) assay (k110579) utilizes CMIA technology for the quantitative determination of vitamin B12 in human serum.

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| Reagents: | | |
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| Characteristics | Submission Device<br>ARCHITECT B12<br>(Plasma Claim) | Predicate Device<br>ARCHITECT B12<br>(k110579) |
| Intended Use and<br>Indications for Use | The ARCHITECT B12 assay<br>is a chemiluminescent<br>microparticle Intrinsic Factor<br>assay for the quantitative<br>determination of vitamin B12<br>in human serum and plasma<br>on the ARCHITECT i System.<br><br>Measurements obtained by<br>this device are used in the<br>diagnosis and treatment of<br>anemias of gastrointestinal<br>malabsorption. | The ARCHITECT B12 assay<br>is a chemiluminescent<br>microparticle Intrinsic Factor<br>assay for the quantitative<br>determination of vitamin B12<br>in human serum on the<br>ARCHITECT i System.<br><br>Measurements obtained by<br>this device are used in the<br>diagnosis and treatment of<br>anemias of gastrointestinal<br>malabsorption. |
| Platform | Same as predicate. | ARCHITECT i System<br>(immunoassay analyzer) |
| Methodology | Same as predicate. | Chemiluminescence |
| Specimen type | Serum and Plasma (lithium<br>heparin) | Serum |
| Calibration Range | Same as predicate. | 0-2,000 pg/mL |
| Expected Values | Same as predicate. | Normal range: US:<br>195-886 pg/mL |
| Measuring Interval | Same as predicate. | 146-2000 pg/mL |

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| Characteristics | Submission Device<br>ARCHITECT B12<br>(Plasma Claim) | Predicate Device<br>ARCHITECT B12<br>(k093401) |
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| Intended use and<br>Indications for Use -<br>Calibrators | The ARCHITECT B12<br>Calibrators are used to<br>calibrate the ARCHITECT<br><i>i</i> System when the system is<br>used for the quantitative<br>determination of vitamin B12<br>in human serum and plasma<br>using the ARCHITECT B12<br>Reagent Kit. | The ARCHITECT B12 Calibrators<br>are used to calibrate the<br>ARCHITECT <i>i</i> System when the<br>system is used for the quantitative<br>determination of vitamin B12 in<br>human serum using the<br>ARCHITECT B12 Reagent Kit. |
| Calibrator Levels | Same as predicate. | 6 levels<br>A: 0 pg/mL,<br>B: 110 pg/mL<br>C: 250 pg/mL<br>D: 500 pg/mL<br>E: 1,000 pg/mL<br>F: 2,000 pg/mL |
| Standardization/<br>Traceability | Same as predicate. | Abbott manufactures B12 internal<br>standards gravimetrically using<br>cyancobalamin (USP Reference<br>Standard). The B12 calibrators are<br>manufactured and tested against<br>these internal standards. |

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| Controls: | | |
|-------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Characteristics | Submission Device<br>ARCHITECT B12<br>(Plasma Claim) | Predicate Device<br>ARCHITECT B12<br>(k093401) |
| Intended use and<br>Indications for Use -<br>Controls | The ARCHITECT B12<br>Controls are used for the<br>estimation of test precision<br>and the detection of<br>systematic analytical<br>deviations of the<br>ARCHITECT i System when<br>used for the quantitative<br>determination of vitamin B12<br>in human serum and plasma<br>when using the ARCHITECT<br>B12 Reagent Kit. | The ARCHITECT B12 Controls<br>are used for the estimation of test<br>precision and the detection of<br>systematic analytical deviations of<br>the ARCHITECT i System when<br>used for the quantitative<br>determination of vitamin B12 in<br>human serum when using the<br>ARCHITECT B12 Reagent Kit. |
| Control Matrix and<br>Components | Same as predicate. | Control L and H contain<br>cyanocobalamin in borate buffer<br>with protein stabilizers (human<br>albumin).<br>Preservative: sodium azide<br>Control M contains<br>cyanocobalamin in human serum.<br>Preservative: sodium azide |
| Control Levels | Same as predicate. | 3 levels<br>Targets:<br>Low: 251 pg/mL<br>Medium: 454 pg/mL<br>High: 915 pg/mL |

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# 7. Summary of Nonclinical Performance

## a. Precision

A 20-day precision study was conducted to evaluate the precision performance of the ARCHITECT B12 assay using plasma panels. This study was based on guidance from the Clinical and Laboratory Standards Institute (CLSI) document EP5-A2. Low, Medium, and High lithium heparin plasma panels were tested. Testing was performed using 2 lots of reagents, and 1 lot each of calibrators and controls on 2 ARCHITECT i 2000sR instruments. The 3 plasma panel levels were each tested in replicates of 3, twice daily (a minimum of 2 hours apart), on each of 20 days, using 2 reagent lots on 2 ARCHITECT i 2000sR instruments.

The calibration curve generated for each reagent lot was stored on each instrument for the duration of the study.

The data demonstrated acceptable total (within-laboratory) imprecision of < 10% CV using lithium heparin plasma panels on the ARCHITECT B12 assay.

Both the serum (cleared in k110579) and plasma demonstrated acceptable total imprecision of ≤ 10% CV at all levels tested.

The results are summarized in the following table.

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ARCHITECT B12

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# ithin-Laboratory Precision (20-Day) Summary (by Instrument, Lot, and Lev

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| Instrument | Lot | Level | N | Unit | Mean | Within Run | | Between Run | | Between Day | | Within-Laboratory (Total)b | |
|------------|-------|--------------|-----|-------|------|------------|-----|-------------|-----|-------------|-----|----------------------------|-----|
| | | | | | | SD | %CV | SD | %CV | SD | %CV | SD | %CV |
| 1 | | Low Panel | 119 | pg/mL | 182 | 9.8 | 5.4 | 3.6 | 2.0 | 6.2 | 3.4 | 12.2 | 6.7 |
| 2 | | Low Panel | 118 | pg/mL | 173 | 8.6 | 4.9 | 3.0 | 1.8 | 5.9 | 3.4 | 10.9 | 6.3 |
| 1 | Lot 1 | Medium Panel | 119 | pg/mL | 966 | 26.2 | 2.7 | 14.3 | 1.5 | 5.5 | 0.6 | 30.4 | 3.1 |
| 2 | Lot 1 | Medium Panel | 120 | pg/mL | 987 | 27.1 | 2.7 | 10.2 | 1.0 | 10.4 | 1.0 | 30.7 | 3.1 |
| 1 | | High Panel | 119 | pg/mL | 1698 | 53.1 | 3.1 | 22.1 | 1.3 | 24.3 | 1.4 | 62.5 | 3.7 |
| 2 | | High Panel | 120 | pg/mL | 1734 | 47.3 | 2.7 | 19.8 | 1.1 | 13.4 | 0.8 | 53.0 | 3.1 |
| 1 | | Low Panel | 119 | pg/mL | 180 | 10.4 | 5.8 | 0.0 | 0.0 | 3.0 | 1.7 | 10.9 | 6.0 |
| 2 | | Low Panel | 120 | pg/mL | 165 | 8.8 | 5.3 | 5.5 | 3.3 | 4.6 | 2.8 | 11.4 | 6.9 |
| 1 | Lot 2 | Medium Panel | 119 | pg/mL | 975 | 40.7 | 4.2 | 11.7 | 1.2 | 5.9 | 0.6 | 42.8 | 4.4 |
| 2 | Lot 2 | Medium Panel | 118 | pg/mL | 979 | 28.3 | 2.9 | 0.0 | 0.0 | 10.2 | 1.0 | 30.1 | 3.1 |
| 1 | | High Panel | 118 | pg/mL | 1912 | 107.5 | 5.6 | 31.0 | 1.6 | 28.6 | 1.5 | 115.4 | 6.0 |
| 2 | | High Panel | 118 | pg/mL | 1693 | 55.1 | 3.3 | 6.7 | 0.4 | 8.0 | 0.5 | 56.1 | 3.3 |

Stay Dolgin Massa latters of NON CLS 2111.
Within-Laboratory (Total) SD and %CV contains WITHIN RUN, BETWEEN RUN, and BETWEEN DAY variance component

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# b. Tube Type

A study was performed based on guidance from the Clinical and Laboratory Standards Institute (CLSI) document EP7-A2.

Plastic serum and lithium heparin plasma separator tubes were used to collect blood from 63 unique donors. Each of the 63 pairs of samples was tested in the same manner, in replicates of at least two using the ARCHITECT B12 assay on one ARCHITECT i 2000sr instrument using 1 lot each of ARCHITECT B12 Reagent Kit, Calibrators, and Controls. The lithium heparin plasma separator blood collection tube was evaluated by comparing the concentrations of specimens collected in that tube type (evaluation tube type) against the concentrations of specimens from the same donors collected in plastic serum tubes (control).

The distribution of % differences across all 63 donors was tested for normality using the Shapiro-Wilk test and a significance level of 0.0100. The data were not normal (p-value=0.0055), so the median and the nonparametric two-sided 95% confidence limits around the median were calculated. The lower and upper confidence limits were 2.2% and 4.7%, respectively. Since the limits fell entirely within the .+/-10.0% criteria, the null hypothesis was rejected, demonstrating that the difference between tube types was within the maximum allowable difference of 10.0%.

| | % Differencea | | | | |
|----------------------------------|---------------|----------------------|--------------|-----|------------|
| Evaluation Tube Type | No. of Donors | Shapiro-Wilk p-Value | Mean/Medianb | SDc | 95% CI |
| Lithium heparin plasma separator | 63 | 0.0055 | 3.3 | NA | (2.2, 4.7) |

The Passing-Bablok regression was performed on samples by regressing the mean concentration values of the lithium heparin tube type versus the mean concentration of the serum tube type.

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In addition, individual replicates from the lithium heparin plasma separator tube were analyzed separately (First Replicates, Second Replicates and Third Replicates). The First, Second, and Third Replicate groups were regressed separately against the mean of the serum plastic control tube values using Passing-Bablok Regression. The summary is provided below.

| Evaluation Tube Type | N | Control Tube<br>(serum plastic)<br>Range<br>(pg/mL) | Evaluation Tube<br>Range<br>(pg/mL) | r | Intercept<br>(pg/mL) | Slope |
|------------------------------------------------------|----|-----------------------------------------------------|-------------------------------------|-------|----------------------|-------|
| Lithium heparin plasma separator<br>First replicate | 63 | 173 - 1866 | 215 - 1971 | 0.998 | 11.13 | 1.02 |
| Lithium heparin plasma separator<br>Second replicate | 63 | 173 - 1866 | 185 - 1979 | 0.997 | 5.42 | 1.01 |
| Lithium heparin plasma separator<br>Third replicate | 60 | 173 - 1866 | 212 - 1959 | 0.997 | -0.14 | 1.02 |

The data support the use of lithium heparin plasma separator blood collection tube type with the ARCHITECT B12 assay.

# 8. Conclusion

The data presented for the use of lithium heparin plasma as a sample type in the pre-market notification demonstrates that the ARCHITECT B12 assay performs substantially equivalent to the predicate device, the Abbott ARCHITECT B12 assay (k110579).

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# DEPARTMENT OF HEALTH & HUMAN SERVICES

Image /page/10/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a circular seal with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" around the perimeter. Inside the circle is a stylized image of three human profiles facing to the right, with flowing lines beneath them, possibly representing water or movement.

#### Food and Drug Administration

10903 New Hampshire Avenue Silver Spring, MD 20993

Abbott Laboratories Abbott Diagnostic Division c/o Darla A. Abano 100 Abbott Park Road Dept. 09V6 AP5 North Abbott Park. IL 60064

MAY 1 7 2012

k121314 Re:

Trade Name: Architect B12 Reagent Kit, Architect B12 Calibrators, Architect B12 Controls

Regulation Number: 21 CFR §862.1810 Regulation Name: Vitamin B12 test system Regulatory Class: Class II Product Codes: CDD, JIT, JJX Dated: April 30, 2012

Received: May 2, 2012

Dear Ms. Abano:

We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration.

If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to such additional controls. Existing major regulations affecting your device can be found in Title 21, Code of Federal Regulations (CFR), Parts 800 to 895. In addition, FDA may publish further announcements concerning your device in the Federal Register.

Please be advised that FDA issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Parts 801 and 809); medical device reporting (reporting of medical device-related adverse events) (21 CFR 803); and good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820).

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#### Page 2

If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please 11 Jou attire of In Vitro Diagnostic Device Evaluation and Safety at [phone]. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 807.97). For questions regarding postmarket surveillance, please contact CDRH's Office of Surveillance and Biometric's (OSB's) Division of Postmarket Surveillance at [phone]. For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to http://www.fda.gov/Medical

Devices/Safety/ReportaProblem/default.htm for the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance...

You may obtain other general information on your responsibilities under the Act from the Tou may of Small Manufacturers, International and Consumer Assistance at its toll-free number [phone] or [phone] or at its Internet address http://www.fda.gov/MedicalDevices/Resourcesfor You/Industry/default.htm

Sincerely yours,

signature

Courney H. Lias, Ph.D. Director Division of Chemistry and Toxicology Devices Office of In Vitro Diagnostic Device Evaluation and Safety Center for Devices and Radiological Health

Enclosure

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#### Indications for Use

510(k) Number (if known):

# Device Name: ARCHITECT B12 Reagent Kit ARCHITECT B12 Calibrators ARCHITECT B12 Controls

## Indications for Use

The ARCHITECT B12 assay is a chemiluminescent microparticle Intrinsic Factor assay for the quantitative determination of vitamin B12 in human serum and plasma on the ARCHITECT i System. Measurements obtained by this device are used in the diagnosis and treatment of anemias of gastrointestinal malabsorption.

The ARCHITECT B12 Calibrators are used to calibrate the ARCHITECT i System when the system is used for the quantitative determination of vitamin B12 in human serum and plasma using the ARCHITECT B12 Reagent Kit.

The ARCHITECT B12 Controls are used for the estimation of test precision and the detection of systematic analytical deviations of the ARCHITECT i System when used for the quantitative determination of vitamin B12 in human serum and plasma when using the ARCHITECT B12 Reagent Kit.

AND/OR Prescription Use X (Part 21 CFR 801 Subpart D)

Over-The-Counter Use (21 CFR 801 Subpart C)

(PLEASE DO NOT WRITE BELOW THIS LINE; CONTINUE ON ANOTHER PAGE IF NEEDED)

Concurrence of CDRH, Office of In Vitro Diagnostic Device Evaluation and Safety (OIVD)

Rutil Chm

Division Sign-Off Office of In Vitro Diagnostic Device Evaluation and Safety

510(k) k121314