FORSURE ONE STEP BUPRENORPHINE CUP TEST DEVICE

K122064 · Tianjin New Bay Bioresearch Co., Ltd. · DJG · May 7, 2013 · Clinical Toxicology

Device Facts

• Record ID: K122064
• Device Name: FORSURE ONE STEP BUPRENORPHINE CUP TEST DEVICE
• Applicant: Tianjin New Bay Bioresearch Co., Ltd.
• Product Code: DJG · Clinical Toxicology
• Decision Date: May 7, 2013
• Decision: SESE
• Submission Type: Traditional
• Regulation: 21 CFR 862.3650
• Device Class: Class 2

Indications for Use

The ForSure One Step Buprenorphine Drug Cup Test Device is an immunochromatographic assay for the qualitative determination of buprenorphine in human urine at cutoff level of 10 ng/mL. The test is intended for prescription and over-the-counter use. The buprenorphine assay will yield preliminary positive results when buprenorphine is ingested at or above therapeutic doses. There are no uniformly recognized drug levels for buprenorphine in urine. The ForSure One Step Buprenorphine Drug Cup Test Device shows the drug was or was not present at the cutoff level. The assay provides only a preliminary analytical test result. A more specific alternative chemical method must be used in order to obtain a confirmed analytical result. Gas Chromatography/Mass Spectrometry (GC/MS) or Liquid Chromatography/Mass Spectrometry (LC/MS) are the preferred confirmatory methods. Clinical consideration and professional judgment should be applied to any drugs of abuse test result, particularly when preliminary positive results are indicated.

Device Story

Lateral flow immunochromatographic assay; detects buprenorphine in human urine. Device consists of test cup and integrated test strip. Principle: competitive binding; buprenorphine in sample competes with colloidal gold-labeled monoclonal antibody-conjugates for binding to buprenorphine-protein conjugates on membrane. Absence of drug allows labeled antibody to bind, producing magenta band (negative); presence of drug inhibits binding, preventing band (positive). Visual readout by operator. Used in point-of-care or home settings; intended for prescription and OTC use. Provides preliminary analytical result; requires confirmation via GC/MS or LC/MS. Assists clinical decision-making regarding drug use.

Clinical Evidence

No clinical trials performed. Performance established via bench testing and lay-user study. Lay-user study (n=104, ages 18-70) demonstrated high agreement with GC/MS across concentrations: 100% agreement for negative samples, 99% for -50% cutoff, 89.4% for -25% cutoff, and 97.1% at cutoff. Analytical precision confirmed via within-run and between-run studies (30 determinations per concentration). Cross-reactivity and interference testing showed no significant impact from structurally unrelated compounds or endogenous substances.

Technological Characteristics

Lateral flow immunochromatographic assay. Membrane coated with goat anti-mouse antibody and Buprenorphine-BSA conjugate. Sample pad contains colloidal gold-labeled mouse monoclonal anti-Buprenorphine antibody. Visual read, single-use, non-instrumented. Storage below 28°C.

Indications for Use

Indicated for qualitative detection of buprenorphine in human urine at 10 ng/mL cutoff. Intended for prescription and over-the-counter use by individuals to screen for buprenorphine ingestion.

Regulatory Classification

Identification

An opiate test system is a device intended to measure any of the addictive narcotic pain-relieving opiate drugs in blood, serum, urine, gastric contents, and saliva. An opiate is any natural or synthetic drug that has morphine-like pharmocological actions. The opiates include drugs such as morphine, morphine glucoronide, heroin, codeine, nalorphine, and meperedine. Measurements obtained by this device are used in the diagnosis and treatment of opiate use or overdose and in monitoring the levels of opiate administration to ensure appropriate therapy.

Special Controls

*Classification.* Class II (special controls). An opiate test system is not exempt if it is intended for any use other than employment or insurance testing or is intended for Federal drug testing programs. The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 862.9, provided the test system is intended for employment and insurance testing and includes a statement in the labeling that the device is intended solely for use in employment and insurance testing, and does not include devices intended for Federal drug testing programs (*e.g.,* programs run by the Substance Abuse and Mental Health Services Administration (SAMHSA), the Department of Transportation (DOT), and the U.S. military).

Predicate Devices

• ForSure One Step Buprenorphine Test Strip Device (k042990)

Submission Summary (Full Text)

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# 510(k) SUBSTANTIAL EQUIVALENCE DETERMINATION DECISION SUMMARY ASSAY ONLY TEMPLATE

A. 510(k) Number:
k122064

B. Purpose for Submission:
New device

C. Measurand:
Buprenorphine

D. Type of Test:
Qualitative immunoassay

E. Applicant:
Tianjin New Bay Bioresearch Co., Ltd.

F. Proprietary and Established Names:
ForSure One Step Buprenorphine Drug Cup Test Device

G. Regulatory Information:

| Product Code | Classification | Regulation Section | Panel |
| --- | --- | --- | --- |
| DJG | II | 862.3650 Opiate test system | 91, Toxicology |

H. Intended Use:

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

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2. Indication(s) for use:

The ForSure One Step Buprenorphine Drug Cup Test Device is an immunochromatographic assay for the qualitative determination of buprenorphine in human urine at cutoff level of 10 ng/mL. The test is intended for prescription and over-the-counter use.

The buprenorphine assay will yield preliminary positive results when buprenorphine is ingested at or above therapeutic doses. There are no uniformly recognized drug levels for buprenorphine in urine. The ForSure One Step Buprenorphine Drug Cup Test Device shows the drug was or was not present at the cutoff level. The assay provides only a preliminary analytical test result. A more specific alternative chemical method must be used in order to obtain a confirmed analytical result. Gas Chromatography/Mass Spectrometry (GC/MS) or Liquid Chromatography/Mass Spectrometry (LC/MS) are the preferred confirmatory methods. Clinical consideration and professional judgment should be applied to any drugs of abuse test result, particularly when preliminary positive results are indicated.

3. Special conditions for use statement(s):

For prescription and over the counter use.

4. Special instrument requirements:

Not applicable, as the devices are visually-read single-use devices.

I. Device Description:

The device is for use with human urine. The ForSure One Step Buprenorphine Drug Cup Test Device is a single-test test strip. The ForSure One Step Buprenorphine Drug Cup Test Device contains a test cup, test strip, and package insert (instructions for use).

J. Substantial Equivalence Information:

1. Predicate device name(s):

ForSure One Step Buprenorphine Test Strip Device

2. Predicate K number(s):

k042990

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3. Comparison with predicate:

| Item | Candidate Device | Predicate |
| --- | --- | --- |
| Intended use | ForSure OTC Buprenorphine One Step Immunochromatographic Drug Cup Qualitative test. The assay provides a simple and rapid analytical screening procedure to detect Buprenorphine and its metabolite drugs in human urine for prescription and OTC use. | Same except for prescription use only |
| Analyte | Buprenorphine | Same |
| Matrix | Urine | Same |
| Cutoff | 10 ng/mL | Same |
| Assay time | 5 minutes | Same |
| Storage | Below 28°C until expiration | Same |
| Chemistry formulation and Antibody used in the device | Using monoclonal/polyclonal antibody for the colloidal gold conjugate, Drug-Bovine Serum albumin conjugate for the test line of the membrane | Same |
| Test Format | Cup (Dip Method) | Test strip (Droplet method) |

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

None were referenced

L. Test Principle:

The ForSure One Step Buprenorphine Drug Cup Test Device is based on lateral flow immunochromatographic technology. Buprenorphine in urine sample competes with the colloidal gold labeled monoclonal antibody-conjugates for binding to Buprenorphine protein conjugates on the test zone area. In the absence of drug in the sample, the Buprenorphine-protein conjugate binds to labeled antibody and produces a magenta band in the test zone area, i.e., a negative result. If drug is present in the sample, labeled antibody does not bind to the Buprenorphine-protein conjugate and produces no magenta band in the test zone area, i.e., a positive result. The absence or presence of the line is determined visually by the operator.

The device also has an internal process control which indicates that adequate volume of sample has been added and that the immunochromatographic device is intact. A

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goat anti-mouse antibody is employed in the control line system.

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

### 1. Analytical performance:

#### a. Precision/Reproducibility:

Precision studies were performed using drug-free urine spiked to the following concentrations: cutoff, +/-25%, +/-50%, +/-75% and 200% of the cutoff. Also, negative urine was tested. The samples were aliquots, randomized and blinded. Within-run reproducibility testing was conducted using one lot tested by one operator in one run for a total of 30 determinations. The between-run reproducibility testing was conducted using 3 lots tested by three operators over 20 days. A total of 30 determinations were made at each concentration for each lot. Sample concentrations were confirmed by GC/MS. The results are displayed in the table below:

Within-run

| Conc. | | |
| --- | --- | --- |
| | Neg | Pos |
| Negative | 30 | 0 |
| -75% | 30 | 0 |
| -50% | 30 | 0 |
| -25% | 26 | 4 |
| Cutoff | 0 | 30 |
| 25% | 0 | 30 |
| 50% | 0 | 30 |
| 75% | 0 | 30 |
| 200% | 0 | 30 |

Between-run

| Conc. | Lot 1 | | Lot 2 | | Lot 3 | |
| --- | --- | --- | --- | --- | --- | --- |
| | Neg | Pos | Neg | Pos | Neg | Pos |
| Negative | 30 | 0 | 30 | 0 | 30 | 0 |
| -75% | 30 | 0 | 30 | 0 | 30 | 0 |
| -50% | 30 | 0 | 30 | 0 | 30 | 0 |
| -25% | 27 | 3 | 26 | 4 | 30 | 0 |
| Cutoff | 0 | 30 | 0 | 30 | 1 | 29 |
| 25% | 0 | 30 | 0 | 30 | 0 | 30 |
| 50% | 0 | 30 | 0 | 30 | 0 | 30 |
| 75% | 0 | 30 | 0 | 30 | 0 | 30 |
| 200% | 0 | 30 | 0 | 30 | 0 | 30 |

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b. Linearity/assay reportable range:

Not applicable, the device is intended for qualitative use

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

This device has internal process controls. A colored line appearing in the control region confirms sufficient sample volume and adequate membrane wicking. Users are informed that the test is invalid if a line fails to appear in the control region.

Control standards are not supplied with this device; however labeling states it is good laboratory practice to confirm the test procedure and to verify proper test performance. Users should follow all applicable guidelines for testing QC materials.

Stability:

Accelerated studies have been conducted. Protocols and acceptance criteria were described and found to be acceptable. The manufacturer claims the following expiration date:

When stored at 2–30 °C product is stable until expiration date which is 24 months.

Real time studies have been conducted and are on-going.

d. Detection limit:

See Precision/Reproducibility section in M1.a above.

e. Analytical specificity:

Cross-reactivity was established by spiking structurally related compounds into drug-free urine. Results are expressed as a minimum concentration of metabolite or compound required to produce a response approximately equivalent to the cutoff concentration of the assay. The percent cross-reactivity of those compounds are presented below:

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| Substances | Concentration (ng/mL) | % Cross-reactivity |
| --- | --- | --- |
| Buprenorphine-β-D-Glucuronide | 2.5 | 400% |
| Buprenorphine | 10 | 100% |
| Nalorphine | 1000 | 1% |
| Norbuprenorphine | 15,000 | 0.06% |
| Norbuprenorphine-3-β-D-Glucuronide | 15,000 | 0.06% |
| Codeine | 12,500 | 0.08% |

Structurally un-related:

This study was performed by spiking structurally unrelated at a concentration of 100 µg/mL compounds and endogenous substances at various concentrations into urine samples containing drug at +/-25% of the respective drug cutoff concentrations. The following compounds showed no interference when tested at the +/-25% drug concentration:

Unrelated substances

| Acetaminophen | Histamine | Lansoprazol |
| --- | --- | --- |
| Acetylsalicylic Acid | 2-Ethylidene-1,5-dimethyl-3,3-diphenylpyrrolio;ine | Oxazepam |
| Amikacin | Hydromorphone | Oxycodone |
| Amitriptyline | Hydrochlorothiazide | Oxymorphine |
| Ampicillin | Imipramine | Phendimetrazine |
| Arterenol | Indomethacin | Penicillin G |
| Aspartame | Levorphanol | Phenobarbital |
| Benzoic Acid | Ketoprofen | d-Propoxyphene |
| Benzoylecgonine HCL | D9-THC | l-Propanol |
| Caffeine | 11-Nor-D9-THC-9-COOH | Phencyclidine |
| Chlorpheniramine | Methylphenidate | Phenobarbital |
| Chlorpromazine HCL | Methadone | Phentermine |
| Cimetidine | Methaqualone | Phenylpropanoamine |
| Deoxyephedrine | Morphine | l-Phenylephrine |
| Dextromethorphan | Histamine | Quinine |
| Diazepam | Morphine-3-Glucuronide | Sodium Salicylate |
| Diethylpropion | 6-Monoacetylmorphine | Tryptophan |
| 5,5-Dihydrocodeine | Nalorphine | Tetracycline |
| Doxylamine | Naloxone | Tetrahydrozoline |
| Ecgonine HCL | Naltrexone | Theophylline |
| Ecgonine Methyl Ester | Noroxycodeine | Thrioridazine |
| Heroin | Noroxymorphine | Trifluoperazine |

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Endogenous substances

| Acetone (1000 mg/dL) | Urea (2000 mg/dL) |
| --- | --- |
| Ascorbate (300 mg/dL) | Ethanol (1000 mg/dL) |
| Creatinine (500 mg/dL) | DL-thyroxine (12 mg/dL) |
| Globulin (500 mg/dL) | Digoxin (15 mg/dL) |
| Glucose (1500 mg/dL) | Apomorphine (10 mg/dL) |
| Hemogobin (300 mg/dL) | Tetracycline (20 mg/dL) |
| NaCl (6000 mg/dL) | D-glucuronic Acid (20 mg/dL) |
| Oxalic (50 mg/dL) | Uric Acid (23 mg/dL) |
| HAS (500 mg/dL) | Ampicillin (20 mg/dL) |

Evaluation of Specific Gravity and pH on test results:

To evaluate the effect of pH value on the test results, urine samples at +/-25% of the cutoff value were used. Each sample was adjusted to pH levels at 4.0, 4.5, 5.0, 6.0, 7.0, 8.0 and 9.0. Each test sample was tested in duplicate.

To evaluate the effect of specific gravity, urine samples at +/-25% of the cut-off values were spiked to obtain specific gravities of 1.003, 1.005, 1.010, 1.015, 1.020, 1.025, and 1.030. Each test sample was tested in duplicate.

The testing results demonstrate that varying pH's and specific gravities do not affect urine testing results around the analyte cut-off.

f. Assay cut-off:

Characterization of how the device performs analytically around the claimed cutoff concentration appears in the precision section, M1.a, above.

2. Comparison studies:

a. Method comparison with predicate device:

An internal study was conducted using 133 unaltered clinical samples tested on the cup device and compared to the GC/MS. Results are displayed below:

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| Buprenorphine | | Negative | Negative (<50% cutoff concentration by GC/MS) | Near cutoff negative (-50% to the cutoff concentration) | Near cutoff positive (cutoff to 50%) | High Positive (>50% cutoff) |
| --- | --- | --- | --- | --- | --- | --- |
| | Positive | 0 | 0 | 0 | 14 | 35 |
| | Negative | 72 | 7 | 5 | 0 | 0 |

A lay user study was performed at three intended user sites with 104 lay persons. Participants in the study (53 females and 51 males) tested the buprenorphine samples. They had diverse educational backgrounds and ranged in age from 18 to 70. Urine samples were prepared at the following concentrations; negative, +/-50%, +/-25% of the cutoff and at the cutoff by spiking drug(s) into drug free-pooled urine specimens. The concentrations of the samples were confirmed by GC/MS. Each sample was aliquoted into individual containers and blind-labeled.

Each participant was provided with the package insert, 1 blind labeled sample and a device. The results are summarized below.

| | | Number of samples | OTC user | | %Agreement With GC/MS |
| --- | --- | --- | --- | --- | --- |
| Drug | Concentration | | Negative | Positive | |
| Buprenorphine | Negative | 104 | 104 | 0 | 100% |
| | -50% | 104 | 103 | 1 | 99% |
| | -25% | 104 | 93 | 11 | 89.4% |
| | cutoff | 104 | 3 | 101 | 97.1% |
| | +25% | 104 | 0 | 104 | 100% |
| | +5%0 | 104 | 0 | 104 | 100% |
| | +75% | 104 | 0 | 104 | 100% |

b. Matrix comparison:

Not applicable. The assay is intended for only one sample matrix, urine

3. Clinical studies:

a. Clinical Sensitivity:

Not applicable

b. Clinical specificity:

Not applicable

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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:
Not applicable

N. Proposed Labeling:
The labeling is sufficient and it satisfies the requirements of 21 CFR Part 809.10.

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

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