InActiv Blue

K221547 · Fertipro NV · QBD · Jun 11, 2024 · Microbiology

Device Facts

• Record ID: K221547
• Device Name: InActiv Blue
• Applicant: Fertipro NV
• Product Code: QBD · Microbiology
• Decision Date: Jun 11, 2024
• Decision: SESE
• Submission Type: Traditional
• Regulation: 21 CFR 866.2950
• Device Class: Class 2

Indications for Use

InActiv Blue is intended for the stabilization, transportation and inactivation of upper respiratory specimens suspected of containing SARS-CoV-2. These devices can be used for collection transport and storage of specimens at refrigerated (2-8°C) or ambient temperatures (20-25°C). SARS-CoV-2 RNA in the specimens is stabilized for 7 days at these specified temperatures. Specimens collected and stored in an InActiv Blue collection tube are suitable for use with legally marketed molecular diagnostic devices.

Device Story

InActiv Blue is a virus-inactivating and lysis solution provided in a polypropylene collection tube with an HDPE cap. It is used for the collection, transport, and storage of upper respiratory swab samples. The solution contains guanidine thiocyanate (denaturing agent/RNase inhibitor), N-lauroylsarcosine (surfactant/viral envelope disruptor), and EDTA (chelating agent/nuclease inhibitor). These components work together to inactivate SARS-CoV-2 by disrupting the viral envelope and preventing RNA degradation, ensuring the viral RNA remains detectable for molecular diagnostic testing. The device is intended for use by healthcare professionals. Specimens are stored at refrigerated (2-8°C) or ambient (20-25°C) temperatures for up to 7 days. The output is a stabilized specimen suitable for downstream molecular analysis. The device benefits patients and clinicians by reducing the infectious risk of collected samples while maintaining RNA integrity for accurate diagnostic results.

Clinical Evidence

Bench testing only. Studies included shelf-life stability (21 months), limit of detection (LOD) using Roche cobas SARS-CoV-2 assay (45 particles/mL), sample stability (7 days at 2-8°C and 20-25°C, with Ct values remaining within 3 of baseline), and viral inactivation (log reduction factor ≥ 3.89 logs after 1 minute exposure).

Technological Characteristics

Solution: guanidine thiocyanate, N-lauroylsarcosine sodium salt, EDTA, methylene blue, sodium phosphate buffer. Form factor: 2mL solution in polypropylene flat-bottom tube with HDPE cap. Sterilization: Not specified. Connectivity: None. Software: None.

Indications for Use

Indicated for stabilization, transport, and inactivation of upper respiratory specimens suspected of containing SARS-CoV-2. Suitable for use with legally marketed molecular diagnostic devices.

Regulatory Classification

Identification

A microbial nucleic acid storage and stabilization device is a device that consists of a container and reagents intended to stabilize microbial nucleic acids in human specimens for subsequent isolation and purification of nucleic acids for further molecular testing. The device is not intended for preserving morphology or viability of microorganisms.

Special Controls

The special controls for this device are: (1) The intended use for the 21 CFR 809.10 labeling must include a detailed description of microorganisms and types of human specimens intended to be preserved. (2) The 21 CFR 809.10(b) labeling must include: (i) A detailed device description, including all device components. (ii) Performance characteristics from applicable analytical studies, including but not limited to, nucleic acid stability and microorganism inactivation. (iii) A limiting statement that erroneous results may occur when the transport device is not compatible with molecular testing. (iv) A limiting statement that the device has only been validated to preserve the representative microorganisms used in the analytical studies. (3) Design verification and validation must include the following: (i) Overall device design including all device components and all control elements incorporated into the analytical validation procedures. (ii) Thorough description of the microorganisms and methodology used in the validation of the device including, but not limited to, extraction platforms and assays used for the detection of preserved nucleic acids. (iii) The limit of detection (LoD) of the molecular test used to establish microorganism nucleic acid stability.

*Classification.* Class II (special controls). The special controls for this device are:(1) The intended use for the labeling required under § 809.10 of this chapter must include a detailed description of microorganisms and types of human specimens intended to be preserved. (2) The labeling required under § 809.10(b) of this chapter must include the following: (i) A detailed device description, including all device components; (ii) Performance characteristics from applicable analytical studies, including nucleic acid stability and microorganism inactivation; (iii) A limiting statement that erroneous results may occur when the transport device is not compatible with molecular testing; and (iv) A limiting statement that the device has only been validated to preserve the representative microorganisms used in the analytical studies. (3) Design verification and validation must include the following: (i) Overall device design, including all device components and all control elements incorporated into the analytical validation procedures; (ii) Thorough description of the microorganisms and methodology used in the validation of the device including, extraction platforms and assays used for the detection of preserved nucleic acids; and (iii) The limit of detection (LoD) of the molecular test used to establish microorganism nucleic acid stability.

Predicate Devices

• DNA/RNA Shield™ Collection Tube (K202641)

Submission Summary (Full Text)

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

## I Background Information:

A 510(k) Number
K221547

B Applicant
FertiPro NV

C Proprietary and Established Names
InActiv Blue

D Regulatory Information
| Product Code(s) | Classification | Regulation Section | Panel |
| --- | --- | --- | --- |
| QBD | Class II | 21 CFR 866.2950 - Microbial Nucleic Acid Storage And Stabilization Device | MI - Microbiology |

## II Submission/Device Overview:

A Purpose for Submission:
To obtain a substantial equivalence determination for the InActiv Blue device for the stabilization, transport, and inactivation of upper respiratory specimens suspected of containing SARS-CoV-2 virus.

B Measurand:
Storage and stability of nucleic acids from SARS-CoV-2 virus.

C Type of Test:
Microbial nucleic acid storage and stabilization device.

Food and Drug Administration
10903 New Hampshire Avenue
Silver Spring, MD 20993-0002
www.fda.govK221547 - Page 1 of 8

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III Intended Use/Indications for Use:

A Intended Use(s):
See Indications for Use below.

B Indication(s) for Use:
InActiv Blue is intended for the stabilization, transportation and inactivation of upper respiratory specimens suspected of containing SARS-CoV-2. These devices can be used for collection transport and storage of specimens at refrigerated (2-8°C) or ambient temperatures (20-25°C). SARS-CoV-2 RNA in the specimens is stabilized for 7 days at these specified temperatures. Specimens collected and stored in an InActiv Blue collection tube are suitable for use with legally marketed molecular diagnostic devices

C Special Conditions for Use Statement(s):
Rx - For Prescription Use Only

D Special Instrument Requirements:
None

IV Device/System Characteristics:

A Device Description:
InActiv Blue is a virus-inactivating and lysis solution that inactivates SARS-CoV-2 viral infectious particles there by removing the infectious potential of the collected material for the target virus without affecting the integrity of the RNA. Two milliliters of the InActiv Blue solution are provided in a polypropylene flat bottom collection tube with a HDPE (high density polyethylene) cap (IB_TUB). Secondary Packaging for the collection tube configuration includes racks of 50 collection tubes and cardboard boxes with either 400 or 1200 collection tubes. Package Inserts are included with all secondary packaging configurations.

Sample types intended for collection with the device include upper respiratory swab samples. Swabs are not provided with the InActiv Blue collection tubes.

B Principle of Operation:
The active components of the InActiv Blue solution are guanidine thiocyanate, N-lauroylsarcosine sodium salt and EDTA. These components are formulated in a sodium phosphate buffered solution containing methylene blue.

V Substantial Equivalence Information:

A Predicate Device Name(s):
DNA/RNA Shield Collection Tube

Food and Drug Administration
10903 New Hampshire Avenue
Silver Spring, MD 20993-0002
www.fda.govK221547 - Page 2 of 8

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B Predicate 510(k) Number(s):

K202641

C Comparison with Predicate(s):

| Device & Predicate Device(s): | Device: K221547 | Predicate: K202641 |
| --- | --- | --- |
| Device Trade Name | InActiv Blue | DNA/RNA Shield Collection Tube |
| General Device Characteristic Similarities | | |
| Intended Use/Indications For Use | InActiv Blue is intended for the stabilization, transportation and inactivation of upper respiratory specimens suspected of containing SARS-CoV-2. These devices can be used for collection transport and storage of specimens at refrigerated (2-8°C) or ambient temperatures (20-25°C). SARS-CoV-2 RNA in the specimens is stabilized for 7 days at these specified temperatures. Specimens collected and stored in an InActiv Blue collection tube are suitable for use with legally marketed molecular diagnostic devices. | The DNA/RNA Shield collection tube is intended for the stabilization and inactivation of upper and lower respiratory human specimens suspected of containing SARS-CoV-2. These devices can be used for collection transport and storage of specimens at ambient temperatures (20-25°C). Specimens collected and stored in a DNA/RNA Shield collection tube are suitable for use with legally marketed molecular diagnostic devices. |
| Inactivation | RNA virus particles | Same |
| Analyte | RNA | Same |
| General Device Characteristic Differences | | |
| Sample source | Human upper respiratory | Human lower and upper respiratory |
| Sample storage temperature | 7 days at refrigerated (2-8°C) or ambient temperatures (20-25°C) | 28 days at 20-25°C |

Food and Drug Administration

10903 New Hampshire Avenue

Silver Spring, MD 20993-0002

www.fda.govK221547 - Page 3 of 8

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VI Standards/Guidance Documents Referenced:

VII Performance Characteristics (if/when applicable):

A Analytical Performance:

1. Precision/Reproducibility:
Not Applicable (N/A)

2. Linearity:
Not Applicable (N/A)

3. Analytical Specificity/Interference:
Not Applicable (N/A)

4. Assay Reportable Range:
Not Applicable (N/A)

5. Shelf-Life Stability:

Shelf-life stability of InActiv Blue was evaluated to ensure product integrity over the complete shelf-life of the product. Completed real-time stability studies included at least eight lots of InActiv Blue which have been stored at room temperature for different periods of time, with performance testing conducted at regularly spaced timepoints to support a 21-month shelf life stability claim.

At each time points, appearance by visual inspection pH (6+/- 0.6), osmolarity (mOsm/kg 4200+/-420) and evaporation were assessed. The product met all stability specifications for the duration of the study, supporting 21 months of shelf life.

6. Detection Limit:

The limit of detection (LOD) of SARS-CoV-2 in InActiv Blue was established through preliminary and confirmatory LOD studies. The LOD was determined for InActiv Blue with nasopharyngeal swab samples, using the Roche cobas SARS-CoV-2 assay (EUA200009) on the cobas 6800 system.

Food and Drug Administration
10903 New Hampshire Avenue
Silver Spring, MD 20993-0002
www.fda.govK221547 - Page 4 of 8

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The preliminary LOD was determined by spiking InActiv Blue with nasopharyngeal clinical matrix and SARS-CoV-2 at concentrations of 5, 15, 45, 135, and 405 particles/mL, with each determination performed in triplicate. The LOD was found to be within the range of 5-5 particles/mL.

Table 1. Preliminary LOD Study Results

| SARS-CoV-2 spike (particles/mL) | Number of Positive Replicates | Number of Negative Replicates | % Positive |
| --- | --- | --- | --- |
| 5 | 1 | 2 | 33% |
| 15 | 3 | 0 | 100% |
| 45 | 3 | 0 | 100% |
| 135 | 3 | 0 | 100% |
| 405 | 3 | 0 | 100% |

The confirmatory LOD was established by spiking a swab with negative clinical nasopharyngeal matrix containing either 15 or 45 SARS-CoV-2 particles/mL, into InActiv Blue media. A total of 20 replicates were evaluated for each concentration. The nasopharyngeal swabs in InActiv Blue, containing 45 particles/mL, showed that 100% of the replicates were positive, and at a concentration of 15 particles/mL 90% of the replicates were positive.

Table 2. Confirmatory LOD Study Results

| SARS-CoV-2 (particles/mL) | Number of Positive Samples | Number of Negative Samples | % Positive |
| --- | --- | --- | --- |
| 15 | 19 | 2 | 90% |
| 45 | 21 | 0 | 100% |

The LOD for nasopharyngeal swab specimen in InActiv Blue was determined to be 45 particles/mL of SARS-CoV-2.

7. Sample Stability Study:

Stability of SARS-CoV-2 in nasopharyngeal specimens stored InActiv Blue was evaluated using product lots of different ages to ensure that there is no decrease in the performance of the product over its claimed shelf-life. Lots of InActiv Blue from different ages (newly manufactured, middle aged and near/recently expired lots), spanning the claimed shelf-life were evaluated. Six replicate samples containing nasopharyngeal matrix were collected and stored in each of the lots of InActiv Blue. Each replicate was spiked with 135 particles/mL (= 3x LOD). Three of the replicates from each lot were stored at 2-8°C while the other 3

Food and Drug Administration
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www.fda.govK221547 - Page 5 of 8

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replicates were stored at $20 - 25^{\circ}\mathrm{C}$ for at least 7 days. Each sample was evaluated using the cobas SARS-CoV-2 assay (EUA200009) on the 6800 system at day 0, day 4 and day 7. All samples collected in the four lots and stored at both temperatures remained within 3 Ct of the initial reading, supporting the sample stability claim for InActiv Blue of 7 days at a temperature between 2-8 and $20 - 25^{\circ}\mathrm{C}$ . The following table summarizes the results obtained.

Table 3. SARS-CoV-2 RNA stability after 4 and 7 days of incubation at $2 - 8^{\circ}\mathrm{C}$ and 20- $25^{\circ}\mathrm{C}$

| Storage Temperature | Lot manufacturing age | Lot # | Target 1 (ORF 1Ab) Delta Ct's | | Target 2 (E gene) Delta Ct's | |
| --- | --- | --- | --- | --- | --- | --- |
| | | | Ct Day4 - Ct Day 0 | Ct Day7 - Ct Day 0 | Ct Day4 - Ct Day 0 | Ct Day7 - Ct Day 0 |
| 4°C | new | FP23IB01 | -0.12 | 0.00 | 0.74 | 0.80 |
| | middle aged | FP21IB04 | 0.09 | 0.20 | 0.80 | 0.37 |
| | after expiry date | FP21IB01 | -0.36 | 0.05 | 0.13 | 0.12 |
| | stressed | FP21IB01 | -0.30 | 0.84 | 0.42 | 0.97 |
| 20°C | new | FP23IB01 | -0.55 | -0.22 | -0.87 | -0.49 |
| | middle aged | FP21IB04 | -0.23 | 0.47 | 0.33 | 0.45 |
| | after expiry date | FP21IB01 | 0.02 | -0.41 | 1.10 | -0.42 |
| | stressed | FP21IB01 | -0.27 | -0.37 | 0.63 | -0.05 |

# 8. Viral Inactivation:

Inactivation was evaluated by measuring the presence of residual infective SARS-CoV-2 viral particles spiked into InActiv Blue. Inactivation studies were conducted in two phases. First a 1:1000 dilution of InActiv Blue was established to eliminate the cytotoxicity of the medium. Higher concentrations of medium were found to render the cultured cells nonviable and unusable for the viral inactivation study. The second phase of viral inactivation evaluated cytotoxicity of SARS-COV-2 spiked into a 1:1000 dilution of the transport media for 1, 2.5 and 5 minutes after inoculation.

The second phase of the study used a high concentration of infectious viral particles $(\mathrm{TCID}_{50} / \mathrm{mL} = 10^{7.5}$ or $10^{7.39})$ . Briefly, $100~\mu \mathrm{L}$ of virus stock was mixed 1:1 with InActiv Blue and incubated for 1, 2.5 and 5 minutes. Negative and positive controls were prepared similarly. The virus and InActiv Blue (as well as positive and negative control samples) were then diluted 1:1000 before each replicate was added to cell culture plates containing adherent Vero E6 cells to determine the minimal incubation time required to inactivate virus. Cultures were incubated for several minutes and observed for presence or absence of cytopathic effect and $\mathrm{TCID}_{50}$ was calculated by the Reed and Muench method. Virus inactivation was evaluated using 3 lots near the expiration of InActiv Blue (approximately 21 months old). Inactivation performance of InActiv Blue after 1 minute exposure was comparable to 2.5 and 5 minutes of exposure for each of the three batches of InActiv Blue evaluated.

Food and Drug Administration

10903 New Hampshire Avenue

Silver Spring, MD 20993-0002

www.fda.govK221547 - Page 6 of 8

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Since the starting viral concentration was 7.5 logs (TCID $_{50}$ /mL=10 $^{7.5}$ ) for two of the lots examined and 7.39 logs (TCID $_{50}$ /mL=10 $^{7.39}$ ) for the third lot, the log infectivity reduction factor was calculated to be at least 3.89 logs for the virus exposed to InActiv Blue medium. Negative control (without virus) demonstrated minimal cellular toxicity and positive control (virus in DMEM) showed no meaningful loss of viral recovery (data not shown). The study results are summarized in Table 4 below.

Table 4: SARS-CoV-2 Viral Inactivation when exposed to InActiv Blue

| Lot | exposure time | log (TCID50 control) - log (TCID50 test) | virus log reduction factor |
| --- | --- | --- | --- |
| 1 | 1 min | 7.50-3.50 | 4 |
| | 2.5 min | 7.50-3.50 | 4 |
| | 5 min | 7.50-3.50 | 4 |
| 2 | 1 min | 7.50-3.50 | 4 |
| | 2.5 min | 7.50-3.50 | 4 |
| | 5 min | 7.50-3.50 | 4 |
| 3 | 1 min | 7.39-3.50 | 3.89 |
| | 2.5 min | 7.39-3.50 | 3.89 |
| | 5 min | 7.39-3.50 | 3.89 |

9. Assay Cut-Off:

Not Applicable (N/A)

B Comparison Studies:

1. Method Comparison with Predicate Device:

Not Applicable (N/A)

2. Matrix Comparison:

Not Applicable (N/A)

C Clinical Studies:

1. Clinical Sensitivity:

Not Applicable (N/A)

2. Clinical Specificity:

Not Applicable (N/A)

3. Other Clinical Supportive Data (When 1. And 2. Are Not Applicable):

Not Applicable (N/A)

Food and Drug Administration
10903 New Hampshire Avenue
Silver Spring, MD 20993-0002
www.fda.govK221547 - Page 7 of 8

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D Clinical Cut-Off:
Not Applicable (N/A)

E Expected Values/Reference Range:
Not Applicable (N/A)

VIII Proposed Labeling:
The labeling supports the finding of substantial equivalence for this device.

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

Food and Drug Administration
10903 New Hampshire Avenue
Silver Spring, MD 20993-0002
www.fda.govK221547 - Page 8 of 8