K222379 · Abbott Molecular, Inc. · QEP · Mar 3, 2023 · Microbiology
Device Facts
Record ID
K222379
Device Name
Alinity m STI Assay
Applicant
Abbott Molecular, Inc.
Product Code
QEP · Microbiology
Decision Date
Mar 3, 2023
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 866.3393
Device Class
Class 2
Indications for Use
The Alinity m STI Assay is an in vitro polymerase chain reaction (PCR) assay for use with the automated Alinity m System for the direct, qualitative detection and differentiation of ribosomal RNA from Chlamydia trachomatis (CT), DNA from Neisseria gonorrhoeae (NG), ribosomal RNA from Trichomonas vaginalis (TV), and ribosomal RNA from Mycoplasma genitalium (MG), to aid in the diagnosis of disease(s) caused by infection from these organisms. The assay may be used to test the following specimens from symptomatic and asymptomatic individuals for the following analytes: CT: vaginal swabs (clinician-collected and self-collected in a clinical setting), endocervical swabs, gynecological specimens in ThinPrep PreservCyt Solution, female urine, male urine, oropharyngeal swabs, and rectal swabs NG: vaginal swabs (clinician-collected and self-collected in a clinical setting), endocervical swabs, gynecological specimens in ThinPrep PreservCyt Solution, female urine, male urine, oropharyngeal swabs, and rectal swabs TV: vaginal swabs (clinician-collected and self-collected in a clinical setting), endocervical swabs, gynecological specimens in ThinPrep PreservCyt Solution, female urine, and male urine MG: vaginal swabs (clinician-collected and self-collected in a clinical setting), endocervical swabs, and male urine A vaginal swab (self-collected or clinician-collected) is the preferred specimen type for MG testing in females due to the higher clinical sensitivity compared to endocervical swabs. If endocervical swab specimens test negative, testing with a vaginal swab may be indicated if M. genitalium infection is suspected.
Device Story
The Alinity m STI Assay is an automated, in vitro, real-time PCR assay performed on the Alinity m System. It detects and differentiates CT (rRNA), NG (DNA), TV (rRNA), and MG (rRNA) from clinical specimens including swabs (vaginal, endocervical, oropharyngeal, rectal) and urine. The system automates sample preparation, RT-PCR assembly, amplification, detection, and result reporting. It uses magnetic microparticle technology for nucleic acid extraction. The assay includes an internal control (armored RNA) and a human gene (beta-globin) control to ensure sample processing and assay validity. The device is used in clinical laboratories by trained personnel. Results aid clinicians in diagnosing STI infections. The assay is a random-access analyzer allowing parallel processing of multiple assays.
Clinical Evidence
Prospective clinical study (N=2785) evaluated CT/NG in female urine; archived samples (N=2784) evaluated CT in PreservCyt. Performance assessed via composite comparator algorithm (CCA) using two/three NAATs. CT in urine: 96.7% PPA, 99.8% NPA. NG in urine: 98.0% PPA, 99.9% NPA. CT in PreservCyt: 98.3% PPA, 99.6% NPA.
Technological Characteristics
Real-time PCR assay; automated nucleic acid extraction via magnetic microparticles. Reagents: lyophilized unit-dose RT-PCR plates and liquid activator plates. Targets: CT (rRNA), NG (DNA), TV (rRNA), MG (rRNA), and human beta-globin (internal control). Connectivity: Integrated with Alinity m System. Storage: 2-8°C (AMP kit), -25 to -15°C (CTRL kit).
Indications for Use
Indicated for symptomatic and asymptomatic individuals to aid in the diagnosis of Chlamydia trachomatis (CT), Neisseria gonorrhoeae (NG), Trichomonas vaginalis (TV), and Mycoplasma genitalium (MG) infections using various urogenital and extragenital specimen types.
Regulatory Classification
Identification
A device to detect nucleic acids from non-viral microorganism(s) causing sexually transmitted infections and associated resistance marker(s) is an in vitro diagnostic device intended for the detection and identification of nucleic acids from non-viral microorganism(s) and their associated resistance markers in clinical specimens collected from patients suspected of sexually transmitted infections. The device is intended to aid in the diagnosis of non-viral sexually transmitted infections in conjunction with other clinical and laboratory data. These devices do not provide confirmation of antibiotic susceptibility since mechanisms of resistance may exist that are not detected by the device.
Special Controls
A device to detect nucleic acids from non-viral microorganism(s) causing sexually transmitted infections and associated resistance marker(s) must comply with the following special controls: (1) The intended use for the 21 CFR 809.10 labeling must include a detailed description of targets the device detects, the results provided to the user, the clinical indications appropriate for test use, and the specific population(s) for which the device is intended. (2) Any sample collection device used must be FDA-cleared, -approved, or -classified as 510(k) exempt (standalone or as part of a test system) for the collection of specimen types claimed by this device: alternatively, the sample collection device must be cleared in a premarket submission as a part of this device. (3) The 21 CFR 809.10(b) labeling must include: (i) A detailed device description, including reagents, instruments, ancillary materials, all control elements, and a detailed explanation of the methodology, including all pre-analytical methods for processing of specimens; (ii) Detailed discussion of the performance characteristics of the device for all claimed specimen types based on analytical studies, including, but not limited to. Limit of Detection, inclusivity, cross-reactivity, interfering substances, competitive inhibition, carryover/cross contamination, specimen stability, with-in lab precision, and reproducibility, as appropriate; (iii) Detailed descriptions of the test procedure, the interpretation of test results for clinical specimens, and acceptance criteria for any quality control testing. (iv) Limiting statements indicating that: (A)a negative test result does not preclude the possibility of infection; (B) the test results should be interpreted in conjunction with other clinical and laboratory data available to the clinician; (C) reliable results are dependent on adequate specimen collection, transport, storage, and processing. Failure to observe procedures in any one of these steps can lead to incorrect results; and (D)if appropriate (e.g., recommended by CDC, by current well-accepted clinical guidelines, or by published peer reviewed research), that the clinical performance is inferior in a specific clinical subpopulation or for a specific claimed specimen type. (v) If the device is intended to detect antimicrobial resistance markers, limiting statements, as appropriate, indicating that: (A)negative results for claimed resistance markers do not indicate susceptibility of detected microorganisms, as resistance markers not measured by the assay or other potential mechanisms of antibiotic resistance may be present; (B) detection of resistance markers cannot be definitively linked to specific microorganisms and the source of a detected resistance marker may be an organism not detected by the assay, including colonizing flora; (C) detection of antibiotic resistance markers may not correlate with phenotypic gene expression; and (D) therapeutic failure or success cannot be determined based on the assay results, since nucleic acid may persist following appropriate antimicrobial therapy. (4) Design verification and validation must include: (i) Detailed device description documentation, including, but not limited to, methodology from obtaining sample to result, design of primer/probe sequences, rationale for target sequence selection, and computational path from collected raw data to reported result (e.g., how collected raw signals are converted into a reported result). (ii) Detailed documentation of analytical studies including but not limited to, Limit of Detection, inclusivity, cross-reactivity, microbial interference, interfering substances, competitive inhibition, carryover/cross contamination, specimen stability, with-in lab precision, and reproducibility, as appropriate. (iii) Detailed documentation and performance results from a clinical study that includes prospective (sequential) samples for each claimed specimen type and, when determined to be appropriate by FDA, additional characterized clinical samples. The study must be performed on a study population consistent with the intended use population and compare the device performance to results obtained from FDA accepted comparator methods. Documentation from the clinical studies must include the clinical study protocol (including a predefined statistical analysis plan) study report, testing results, and results of all statistical analyses. (iv) A detailed description of the impact of any software, including, but not limited to, software applications and hardware-based devices that incorporate software, on the device's functions.
*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 targets the device detects, the results provided to the user, the clinical indications appropriate for test use, and the specific population(s) for which the device is intended.
(2) Any sample collection device used must be FDA-cleared, -approved, or -classified as 510(k) exempt (standalone or as part of a test system) for the collection of specimen types claimed by this device; alternatively, the sample collection device must be cleared in a premarket submission as a part of this device.
(3) The labeling required under § 809.10(b) of this chapter must include:
(i) A detailed device description, including reagents, instruments, ancillary materials, all control elements, and a detailed explanation of the methodology, including all pre-analytical methods for processing of specimens;
(ii) Detailed discussion of the performance characteristics of the device for all claimed specimen types based on analytical studies, including Limit of Detection, inclusivity, cross-reactivity, interfering substances, competitive inhibition, carryover/cross contamination, specimen stability, within lab precision, and reproducibility, as appropriate;
(iii) Detailed descriptions of the test procedure, the interpretation of test results for clinical specimens, and acceptance criteria for any quality control testing;
(iv) Limiting statements indicating that:
(A) A negative test result does not preclude the possibility of infection;
(B) The test results should be interpreted in conjunction with other clinical and laboratory data available to the clinician;
(C) Reliable results are dependent on adequate specimen collection, transport, storage, and processing. Failure to observe proper procedures in any one of these steps can lead to incorrect results; and
(D) If appropriate (
*e.g.,* recommended by the Centers for Disease Control and Prevention, by current well-accepted clinical guidelines, or by published peer reviewed research), that the clinical performance is inferior in a specific clinical subpopulation or for a specific claimed specimen type; and(v) If the device is intended to detect antimicrobial resistance markers, limiting statements, as appropriate, indicating that:
(A) Negative results for claimed resistance markers do not indicate susceptibility of detected microorganisms, as resistance markers not measured by the assay or other potential mechanisms of antibiotic resistance may be present;
(B) Detection of resistance markers cannot be definitively linked to specific microorganisms and the source of a detected resistance marker may be an organism not detected by the assay, including colonizing flora;
(C) Detection of antibiotic resistance markers may not correlate with phenotypic gene expression; and
(D) Therapeutic failure or success cannot be determined based on the assay results, since nucleic acid may persist following appropriate antimicrobial therapy.
(4) Design verification and validation must include:
(i) Detailed device description documentation, including methodology from obtaining sample to result, design of primer/probe sequences, rationale for target sequence selection, and computational path from collected raw data to reported result (
*e.g.,* how collected raw signals are converted into a reported result).(ii) Detailed documentation of analytical studies, including, Limit of Detection, inclusivity, cross-reactivity, microbial interference, interfering substances, competitive inhibition, carryover/cross contamination, specimen stability, within lab precision, and reproducibility, as appropriate.
(iii) Detailed documentation and performance results from a clinical study that includes prospective (sequential) samples for each claimed specimen type and, when determined to be appropriate by FDA, additional characterized clinical samples. The study must be performed on a study population consistent with the intended use population and compare the device performance to results obtained from FDA accepted comparator methods. Documentation from the clinical studies must include the clinical study protocol (including a predefined statistical analysis plan) study report, testing results, and results of all statistical analyses.
(iv) A detailed description of the impact of any software, including software applications and hardware-based devices that incorporate software, on the device's functions.
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510(k) SUBSTANTIAL EQUIVALENCE DETERMINATION
DECISION SUMMARY
ASSAY AND INSTRUMENT
I Background Information:
A 510(k) Number
K222379
B Applicant
Abbott Molecular Inc.
C Proprietary and Established Names
Alinity m STI Assay
D Regulatory Information
| Product Code(s) | Classification | Regulation Section | Panel |
| --- | --- | --- | --- |
| QEP | Class II | 21 CFR 866.3393 - Device To Detect Nucleic Acids From Non-Viral Microorganism(S) Causing Sexually Transmitted Infections And Associated Resistance Marker(S) | MI - Microbiology |
II Submission/Device Overview:
A Purpose for Submission:
The Alinity m STI Assay was previously cleared (K202977). In this submission, performance data provided in support of adding the following claims to the Intended Use of the Alinity m STI Assay:
- Detection of Chlamydia trachomatis (CT) ribosomal RNA in female urine and in gynecological samples collected in PreservCyt solution; and
- Detection of Neisseria gonorrhoeae (NG) genomic DNA in female urine
No modifications were made to assay reagents, procedures, or devices used to collect samples or execute the assay.
Food and Drug Administration
10903 New Hampshire Avenue
Silver Spring, MD 20993-0002
www.fda.gov K222379 - Page 1 of 16
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B Measurand:
Chlamydia trachomatis (CT) - Ribosomal RNA
Neisseria gonorrhoeae (NG) - DNA
Trichomonas vaginalis (TV) – Ribosomal RNA
Mycoplasma genitalium (MG) – Ribosomal RNA
C Type of Test:
Qualitative, real time nucleic acid amplification test (NAAT)
III Intended Use/Indications for Use:
A Intended Use(s):
See Indications for Use below.
B Indication(s) for Use:
The Alinity m STI Assay is an in vitro polymerase chain reaction (PCR) assay for use with the automated Alinity m System for the direct, qualitative detection and differentiation of ribosomal RNA from Chlamydia trachomatis (CT), DNA from Neisseria gonorrhoeae (NG), ribosomal RNA from Trichomonas vaginalis (TV), and ribosomal RNA from Mycoplasma genitalium (MG), to aid in the diagnosis of disease(s) caused by infection from these organisms. The assay may be used to test the following specimens from symptomatic and asymptomatic individuals for the following analytes:
- CT: vaginal swabs (clinician-collected and self-collected in a clinical setting), endocervical swabs, gynecological specimens in ThinPrep PreservCyt Solution, female urine, male urine, oropharyngeal swabs, and rectal swabs
- NG: vaginal swabs (clinician-collected and self-collected in a clinical setting), endocervical swabs, gynecological specimens in ThinPrep PreservCyt Solution, female urine, male urine, oropharyngeal swabs, and rectal swabs
- TV: vaginal swabs (clinician-collected and self-collected in a clinical setting), endocervical swabs, gynecological specimens in ThinPrep PreservCyt Solution, female urine, and male urine
- MG: vaginal swabs (clinician-collected and self-collected in a clinical setting), endocervical swabs, and male urine
A vaginal swab (self-collected or clinician-collected) is the preferred specimen type for MG testing in females due to the higher clinical sensitivity compared to endocervical swabs and urine. If endocervical swab specimens or urine specimens test negative, testing with a vaginal swab may be indicated if M. genitalium infection is suspected.
C Special Conditions for Use Statement(s):
Rx - For Prescription Use Only
Food and Drug Administration
10903 New Hampshire Avenue
Silver Spring, MD 20993-0002
www.fda.gov K222379 - Page 2 of 16
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For use with the Alinity m System
## D Special Instrument Requirements:
Alinity m System needed to execute the Alinity m STI Assay
## IV Device/System Characteristics:
## A Device Description:
The Alinity m System is a fully integrated instrument that can process 300 samples per day from first sample aspiration to the last test result. The Alinity m System supports random access to assays as well as continuous loading of samples, reagents, and commodities. All the necessary reagents are pre-loaded onto the instrument prior to running samples.
All stages of the Alinity m STI Assay procedure are executed automatically by the Alinity m System. The Alinity m System is designed to be a random-access analyzer that can perform the Alinity m STI Assay in parallel with other Alinity m assays on the same instrument. The steps of the Alinity m STI Assay consist of:
- Sample preparation and nucleic acid isolation from specimens
- RT-PCR assembly for relevant RNA targets (CT)
- PCR amplification and amplicon detection of specific targets
- Result calculation and reporting of quantitative or qualitative results.
The Alinity m STI Assay requires the following:
1. Alinity m STI AMP Kit (09N17-095) comprised of two separate reagent trays:
- Alinity m STI AMP Tray 1 (4x96-well plates): contains lyophilized, unit-dose RT-PCR amplification and detection reagents
- Alinity m STI ACT Tray 2 (4x96-well plates): contains liquid to rehydrate lyophilized reagents
2. Alinity m STI CTRL Kit 09N17-085 consists of single-use tubes containing liquid form:
- Negative controls (12 tubes x 0.47mL)
- Positive controls (12 tubes x 0.47mL)
3. Alinity m multi-Collect Specimen Collection Kit (List No. 09N19-015), with the following components:
- One Transport Tube filled with 1.4 mL Alinity m Transport Buffer
- One individually packaged Sterile Specimen Collection Swab
- One disposable Transfer Pipette
4. Alinity m Sample Prep Kit 1 (List No. 09N18-001) is used to isolate nucleic acids from biological samples for analysis in PCR tests and consists of:
- Alinity m Elution Buffer 1 which contains nuclease, protease free molecular grade water, and Tween 20 and preservatives
- Alinity m Microparticles 1, which contains magnetic microparticles in 6.2 M Guanidine hydrochloride solution
5. Alinity m System Solutions (List No. 09N20) collectively encompass:
Food and Drug Administration
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www.fda.gov K222379 - Page 3 of 16
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- Alinity m Lysis Solution (List No. 09N20-001)
- Alinity m Ethanol Solution (List No. 09N20-002)
- Alinity m Diluent Solution (List No. 09N20-003)
- Alinity m Vapor Barrier Solution (List No. 09N20-004)
6. Alinity m Tubes and Caps (List No. 09N49) collectively encompass:
- Alinity m LRV Tube (List No. 09N49-001)
- Alinity m Transport Tube Pierceable Capped (List No. 09N49-010)
- Alinity m Transport Tube (List No. 09N49-011)
- Alinity m Pierceable Cap (List No. 09N49-012)
- Alinity m Aliquot Tube (List No. 09N49-013)
7. Alinity m System (List No. 08N53-002)
## Specimen Collection:
Endocervical, vaginal, oropharyngeal, and rectal swabs, female urine and male urine specimens must be collected using the Alinity m multi-Collect Specimen Collection Kit, according to the instructions for use. Gynecological specimens in PreservCyt Solution (Hologic Inc.) must be collected and handled according to the manufacturer's instructions. For PreservCyt specimens, only the aliquot taken from the PreservCyt vial prior to cytology processing must be transferred to an Alinity m Transfer Tube for processing on the Alinity m System.
## B Principle of Operation:
Nucleic acids from specimens are extracted automatically on-board the Alinity m System using the Alinity m Sample Prep Kit 1, Alinity m Lysis Solution, Alinity m Diluent Solution, and Alinity m Ethanol. The Alinity m System employs magnetic microparticle technology to facilitate nucleic acid capture, wash, and elution. The resulting purified nucleic acids are then combined with the liquid unit-dose activator reagent, lyophilized unit-dose Alinity m STI amplification reagents, and Alinity m Vapor Barrier Solution, and transferred by the instrument to an amplification/detection module for reverse transcription, PCR amplification, and real-time fluorescence detection.
## Assay Controls:
External assay controls are included in the Alinity m STI CTRL Kit. These controls are recommended to be tested at the minimum frequency of once every 24 hours to help ensure that instrument and reagent performance remain satisfactory. During each control event, a negative control and a positive control are processed through sample preparation and RT-PCR procedures that are identical to those used for specimens.
Internal assay controls are used to demonstrate proper sample processing and assay validity.
- Endogenous cellular control (CC): Amplification and detection of human DNA sequence demonstrates proper sample processing and adequate sample input. The Alinity m STI amplification reagents include primers and probes that amplify and detect the CC.
Food and Drug Administration
10903 New Hampshire Avenue
Silver Spring, MD 20993-0002
www.fda.gov K222379 - Page 4 of 16
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- Exogenous internal control (IC): An exogenous, armored RNA sequence is included in the lyophilized Alinity m STI amplification reagents to confirm that no PCR inhibitors are present in the sample.
## C Instrument Description Information:
1. Instrument Name:
Alinity m System
2. Specimen Identification:
The system includes a touchscreen where the operator directs the system to execute various tasks, and a barcode scanner for sample identification.
3. Specimen Sampling and Handling:
The samples may be loaded on the system in any order. The system pipettor robot dispenses and aspirates liquids, as appropriate for each reaction. Sample handling and reagent transport is performed by a handler robot.
4. Calibration:
No assay calibration is performed for the Alinity m STI panel.
## V Substantial Equivalence Information:
A Predicate Device Name(s):
Alinity m STI Assay
B Predicate 510(k) Number(s):
K202977
## C Comparison with Predicate(s):
| Device & Predicate Device(s): | K222379 | K202977 |
| --- | --- | --- |
| Device Trade Name | Alinity m STI | Alinity m STI |
| General Device Characteristic Similarities | | |
| Assay Type | Same | Qualitative Nucleic Acid Amplification Test (NAAT) |
| Assay Targets | Same | CT ribosomal RNA
NG genomic DNA
TV ribosomal RNA |
Food and Drug Administration
10903 New Hampshire Avenue
Silver Spring, MD 20993-0002
www.fda.govK222379 - Page 5 of 16
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| | | MG ribosomal RNA |
| --- | --- | --- |
| Sample Preparation Procedure | Same | Automated extraction and purification |
| Amplification Technology | Same | Real-time PCR |
| Assay Controls | Same | External and internal positive and negative controls |
| General Device Characteristic Differences | | |
| Intended Use/Indications For Use | The Alinity m STI Assay is an in vitro polymerase chain reaction (PCR) assay for use with the automated Alinity m System for the direct, qualitative detection and differentiation of RNA from Chlamydia trachomatis (CT), Trichomonas vaginalis (TV), Mycoplasma genitalium (MG), and DNA from Neisseria gonorrhoeae (NG) to aid in the diagnosis of urogenital disease(s) caused by infection from these organisms.The assay may be used to test the following specimens from symptomatic and asymptomatic individuals for the following analytes:CT: vaginal swabs (clinician-collected and self-collected in a clinical settings), endocervical swabs, male urine, female urine, gynecological specimens in ThinPrep PreservCyt Solution, oropharyngeal swabs, and rectal swabsNG: vaginal swabs (clinician-collected and self-collected in a clinical settings), endocervical swabs, gynecological specimens in ThinPrep PreservCyt Solution, male urine, female urine, oropharyngeal swabs, and rectal swabsTV: vaginal swabs (clinician-collected and self-collected in a clinical settings), endocervical swabs, gynecological specimens in ThinPrep PreservCyt Solution, female urine, and male urine | The Alinity m STI Assay is an in vitro polymerase chain reaction (PCR) assay for use with the automated Alinity m System for the direct, qualitative detection and differentiation of RNA from Chlamydia trachomatis (CT), Trichomonas vaginalis (TV), Mycoplasma genitalium (MG), and DNA from Neisseria gonorrhoeae (NG) to aid in the diagnosis of urogenital disease(s) caused by infection from these organisms.The assay may be used to test the following specimens from symptomatic and asymptomatic individuals for the following analytes:CT: vaginal swabs (clinician-collected and self-collected in a clinical settings), endocervical swabs, male urine, oropharyngeal swabs, and rectal swabsNG: vaginal swabs (clinician-collected and self-collected in a clinical settings), endocervical swabs, gynecological specimens in ThinPrep PreservCyt Solution, male urine, oropharyngeal swabs, and rectal swabsTV: vaginal swabs (clinician-collected and self-collected in a clinical settings), endocervical swabs, gynecological specimens in ThinPrep PreservCyt Solution, female urine, and male urine |
Food and Drug Administration
10903 New Hampshire Avenue
Silver Spring, MD 20993-0002
www.fda.govK222379 - Page 6 of 16
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VI Standards/Guidance Documents Referenced:
Class II Special Controls as per 21 CFR 866.3393
VII Performance Characteristics (if/when applicable):
A Analytical Performance:
1. Precision/Reproducibility:
Please refer to K202977 for the precision and reproducibility conducted in support of the Alinity m STI Assay. An updated precision information is provided below:
Updated CT Analyte Between-Day Precision Data from K202977
| | Matrix | | | |
| --- | --- | --- | --- | --- |
| | Urine | | Swab | |
| Panel Description | SD | % CV | SD | % CV |
| CT High Pos (NG, TV & MG High Pos) | 0.612 | 3.7 | 0.000 | 0.0 |
Food and Drug Administration
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www.fda.govK222379 - Page 7 of 16
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Updated NG Analyte Between-Day Precision Data from K202977
| | Matrix | | | | |
| --- | --- | --- | --- | --- | --- |
| | Urine | | Swab | | PreservCyt |
| Panel Description | SD | % CV | SD | % CV | SD |
| NG High Pos (CT, TV & MG High Pos) | 0.227 | 1.0 | 0.076 | 0.4 | 0.000 |
| NG High Pos (CT, TV & MG at 2X LoD Claim) | 0.279 | 1.2 | 0.236 | 1.1 | 0.038 |
| NG at 2X LoD Claim (MG High Pos, CT & TV at 2X LoD Claim) | 0.262 | 0.8 | 0.127 | 0.4 | 0.000 |
| NG at 2X LoD Claim (TV High Pos, CT & MG at 2X LoD Claim) | 0.203 | 0.7 | 0.175 | 0.6 | 0.071 |
| NG at 2X LoD Claim (CT, TV & MG at 2X LoD Claim) | 0.245 | 0.8 | 0.091 | 0.3 | 0.084 |
| NG at 2X LoD Claim (CT High Pos, TV & MG at 2X LoD Claim) | 0.233 | 0.7 | 0.158 | 0.5 | 0.000 |
| NG at 2X LoD Claim (NG only) | 0.150 | 0.5 | 0.052 | 0.2 | 0.092 |
| NG at LoD Claim | 0.280 | 0.9 | 0.090 | 0.3 | 0.000 |
| NG at Sub-LoD (High Negative) | 0.000 | 0.0 | 0.000 | 0.0 | 0.000 |
| NG Negative | ... | ... | ... | ... | ... |
Updated TV Analyte Between-Day Precision Data from K202977
| | Matrix | | | | | |
| --- | --- | --- | --- | --- | --- | --- |
| | Urine | | Swab | | PreservCyt | |
| Panel Description | SD | % CV | SD | % CV | SD | % CV |
| TV High Pos (CT, NG & MG High Pos) | 0.626 | 6.4 | 0.121 | 1.2 | 0.000 | 0.0 |
| TV High Pos (CT, NG & MG at 2X LoD Claim) | 0.638 | 6.5 | 0.139 | 1.4 | 0.000 | 0.0 |
| TV at 2X LoD Claim (MG High Pos, CT & NG at 2X LoD Claim) | 0.243 | 0.9 | 0.000 | 0.0 | 0.000 | 0.0 |
| TV at 2X LoD Claim (NG High Pos, CT & MG at 2X LoD Claim) | 0.305 | 1.1 | 0.157 | 0.5 | 0.054 | 0.2 |
| TV at 2X LoD Claim (CT High Pos, NG & MG at 2X LoD Claim) | 0.398 | 1.4 | 0.113 | 0.4 | 0.030 | 0.1 |
| TV at 2X LoD Claim (CT, NG & MG at 2X LoD Claim) | 0.302 | 1.1 | 0.141 | 0.5 | 0.000 | 0.0 |
| TV at 2X LoD Claim (TV only) | 0.289 | 1.1 | 0.063 | 0.2 | 0.118 | 0.4 |
| TV at LoD Claim | 0.329 | 1.1 | 0.096 | 0.3 | 0.115 | 0.4 |
| TV at Sub-LoD (High Negative) | 0.205 | 0.6 | 0.160 | 0.5 | 0.124 | 0.4 |
| TV Negative | ... | ... | ... | ... | ... | ... |
Updated MG Analyte Between-Day Precision Data from K202977
| | Matrix | | | | | |
| --- | --- | --- | --- | --- | --- | --- |
| | Urine | | Swab | | PreservCyt | |
| Panel Description | SD | % CV | SD | % CV | SD | % CV |
| MG High Pos (CT, NG & TV High Pos) | 0.612 | 3.0 | 0.000 | 0.0 | | |
| MG High Pos (CT, NG & TV at 2X LoD Claim) | 0.257 | 1.2 | 0.000 | 0.0 | | |
| MG at 2X LoD Claim (TV High Pos, CT & NG at 2X LoD Claim) | 0.598 | 1.9 | 0.057 | 0.2 | | |
| MG at 2X LoD Claim (NG High Pos, CT & TV at 2X LoD Claim) | 0.317 | 1.0 | 0.082 | 0.3 | | |
| MG at 2X LoD Claim (CT High Pos, NG & TV at 2X LoD Claim) | 0.443 | 1.4 | 0.037 | 0.1 | | |
| MG at 2X LoD Claim (CT, NG & TV at 2X LoD Claim) | 0.352 | 1.1 | 0.048 | 0.2 | | |
| MG at 2X LoD Claim (MG only) | 0.257 | 0.8 | 0.023 | 0.1 | | |
| MG at LoD Claim | 0.479 | 1.5 | 0.011 | 0.0 | | |
| MG at Sub-LoD (High Negative) | 0.819 | 2.1 | 0.000 | 0.0 | | |
| MG Negative | ... | ... | ... | ... | | |
Food and Drug Administration
10903 New Hampshire Avenue
Silver Spring, MD 20993-0002
www.fda.govK222379 - Page 8 of 16
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In support of the CT in PreservCyt Specimen claim, the following within-lab precision and reproducibility data was also provided.
| Within Laboratory Precision Analysis of CT in PreservCyt | | | | | Within Run | | Between Run | | Between Day | | Within Labc | | Between Instrument/Lot | | Totald | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Panel Description | Na | nb | % Agreement (n/N) | Mean CN | SD | % CV | SD | % CV | SD | % CV | SD | % CV | SD | % CV | SD | % CV |
| CT High Pos (NG, TV & MG High Pos) | 144 | 144 | 100.0% | 17.21 | 0.181 | 1.0 | 0.095 | 0.6 | 0.024 | 0.1 | 0.205 | 1.2 | 0.089 | 0.5 | 0.224 | 1.3 |
| CT High Pos (NG, TV & MG at 2X LoD Claim) | 144 | 144 | 100.0% | 17.66 | 0.102 | 0.6 | 0.073 | 0.4 | 0.000 | 0.0 | 0.125 | 0.7 | 0.113 | 0.6 | 0.169 | 1.0 |
| CT at 2X LoD Claim (MG High Pos, NG & TV at 2X LoD Claim) | 144 | 144 | 100.0% | 29.77 | 0.102 | 0.3 | 0.049 | 0.2 | 0.036 | 0.1 | 0.118 | 0.4 | 0.082 | 0.3 | 0.144 | 0.5 |
| CT at 2X LoD Claim (TV High Pos, NG & MG at 2X LoD Claim) | 144 | 144 | 100.0% | 30.77 | 0.162 | 0.5 | 0.144 | 0.5 | 0.000 | 0.0 | 0.216 | 0.7 | 0.196 | 0.6 | 0.292 | 0.9 |
| CT at 2X LoD Claim (NG High Pos, TV & MG at 2X LoD Claim) | 144 | 144 | 100.0% | 29.83 | 0.220 | 0.7 | 0.032 | 0.1 | 0.000 | 0.0 | 0.222 | 0.7 | 0.149 | 0.5 | 0.268 | 0.9 |
| CT at 2X LoD Claim (NG, TV & MG at 2X LoD Claim) | 144 | 144 | 100.0% | 30.33 | 0.607 | 2.0 | 0.000 | 0.0 | 0.126 | 0.4 | 0.620 | 2.0 | 0.000 | 0.0 | 0.620 | 2.0 |
| CT at 2X LoD Claim (CT only) | 144 | 144 | 100.0% | 31.09 | 0.402 | 1.3 | 0.141 | 0.5 | 0.000 | 0.0 | 0.426 | 1.4 | 0.180 | 0.6 | 0.462 | 1.5 |
| CT at LoD Claim | 144 | 144 | 100.0% | 31.22 | 0.721 | 2.3 | 0.000 | 0.0 | 0.300 | 1.0 | 0.781 | 2.5 | 0.000 | 0.0 | 0.781 | 2.5 |
| CT at Sub-LoD (High Negative) | 144 | 40 | 27.8% | 37.36 | 0.228 | 0.6 | 0.348 | 0.9 | 0.125 | 0.3 | 0.434 | 1.2 | 0.224 | 0.6 | 0.489 | 1.3 |
| CT Negativee | 576 | 576 | 100% | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
a N: Total number of replicates
b n: Number of replicates with detectable analyte for positive panel and non-detected for negative panel; the number of replicates were used for the Mean and SD calculation.
c Within laboratory includes Within-Run/Day, Between-Run/Day and Between-Day Components.
Total includes Within-Run/Day, Between-Run/Day, Between-Day, Between Instrument/Lot Components.
e The negative panel included 4 panel members negative for CT.
| Reproducibility Analysis of CT in PreservCyt | | | | | Within Run | | Between Run | | Between Lot | | Between Site | | Totale | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Panel Description | Na | nb | % Agreement (n/N) | Mean CN | SD | % CV | SD | % CV | SD | % CV | SD | % CV | SD | % CV |
| CT High Pos (NG, TV & MG High Pos) | 150 | 150 | 100.0% | 17.40 | 0.212 | 1.2 | 0.105 | 0.6 | 0.081 | 0.5 | 0.080 | 0.5 | 0.263 | 1.5 |
| CT High Pos (NG, TV & MG at 2X LoD Claim) | 150 | 150 | 100.0% | 17.64 | 0.333 | 1.9 | 0.175 | 1.0 | 0.197 | 1.1 | 0.000 | 0.0 | 0.424 | 2.4 |
| CT at 2X LoD Claim (MG High Pos, NG & TV at 2X LoD Claim) | 150 | 150 | 100.0% | 30.07 | 0.216 | 0.7 | 0.141 | 0.5 | 0.162 | 0.5 | 0.000 | 0.0 | 0.305 | 1.0 |
| CT at 2X LoD Claim (TV High Pos, NG & MG at 2X LoD Claim) | 150 | 150 | 100.0% | 29.92 | 0.153 | 0.5 | 0.097 | 0.3 | 0.071 | 0.2 | 0.047 | 0.2 | 0.200 | 0.7 |
| CT at 2X LoD Claim (NG High Pos, TV & MG at 2X LoD Claim) | 150 | 150 | 100.0% | 31.14 | 0.223 | 0.7 | 0.152 | 0.5 | 0.095 | 0.3 | 0.124 | 0.4 | 0.312 | 1.0 |
| CT at 2X LoD Claim (NG, TV & MG at 2X LoD Claim) | 150 | 150 | 100.0% | 30.57 | 0.650 | 2.1 | 0.321 | 1.1 | 0.000 | 0.0 | 0.137 | 0.4 | 0.738 | 2.4 |
| CT at 2X LoD Claim (CT only) | 150 | 150 | 100.0% | 31.63 | 0.779 | 2.5 | 0.184 | 0.6 | 0.457 | 1.4 | 0.000 | 0.0 | 0.921 | 2.9 |
| CT at LoD Claim | 150 | 150 | 100.0% | 31.73 | 0.935 | 2.9 | 0.163 | 0.5 | 0.000 | 0.0 | 0.158 | 0.5 | 0.962 | 3.0 |
| CT at Sub-LoD (High Negative) | 150 | 37 | 24.7% | 37.33 | 0.646 | 1.7 | 0.215 | 0.6 | 0.740 | 2.0 | 0.000 | 0.0 | 1.005 | 2.7 |
| CT Negativef | 600 | 598 | 99.7% | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
a N: Total number of replicates
b n: Number of replicates with detectable analyte for positive panel and non-detected for negative panel; the number of replicates were used for the Mean and SD calculation.
Total includes Within-Run/Day, Between-Run/Day, Between-Day, Between Instrument/Lot Components.
d The negative panel included 4 panel members negative for CT.
The provided reproducibility data supported the CT in PreservCyt claim.
2. Linearity:
Not applicable
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{9}
3. Analytical Specificity/Interference:
Please refer to K202977 for the Analytical specificity/interference studies conducted in support of the Alinity m STI Assay.
4. Assay Reportable Range:
Not applicable
5. Traceability, Stability, Expected Values (Controls, Calibrators, or Methods):
Please refer to K202977 for the traceability, stability, and expected values studies conducted in support of the Alinity m STI Assay.
6. Detection Limit:
Please refer to K202977 for the LoD studies conducted in support of the Alinity m STI Assay.
7. Assay Cut-Off:
Please refer to K202977 for the Assay cut-off studies conducted in support of the Alinity m STI Assay.
8. Carry-Over:
Please refer to K202977 for the Carry-over studies conducted in support of the Alinity m STI Assay.
B Comparison Studies:
See Clinical Studies section below.
1. Matrix Comparison:
Please refer to K202977.
C Clinical Studies:
Data from two studies were provided to support the new claims in this submission. A prospective clinical study was initiated to acquire fresh female urine samples and assess the clinical performance of the Alinity m STI Assay in detection of CT and NG in female urine. Separately, archived, prospectively collected samples from the previous clinical study (in support of K202977) were used to assess the performance of the device in detecting CT in gynecological samples collected in PreservCyt.
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www.fda.govK222379 - Page 10 of 16
{10}
The clinical performance of the Alinity m STI Assay was assessed using a composite comparator algorithm (CCA) to establish specimen-specific agreement with FDA cleared assays. The positive percent agreement (PPA) and negative percent agreement (NPA) was determined by the CCA using two NAATs (NAAT1 and NAAT2). If the two comparator assays did not agree or if one comparator result was missing or indeterminate, a third tiebreaker NAAT (NAAT3) was used. A specimen CCA was categorized as "Positive" when two of the three comparator results were positive, and "Negative" when two of the three comparator results were negative.
## Specimen-specific Agreement Performance of Alinity m STI Assay for CT and NG in female urine:
Urine specimens were prospectively collected from female subjects 14 years of age or older at 14 geographically diverse sites. A total of 2798 asymptomatic and symptomatic subjects were enrolled. Each subject provided one urine specimen. Samples were aliquoted into the Alinity m multi-Collect Specimen Collection Kit and comparator collection devices and shipped to appropriate testing laboratories for Alinity m STI Assay and comparator testing.
Alinity m STI Assay testing was performed at external clinical testing sites representing the intended users of the Alinity m STI Assay and System. Comparator testing was performed at one external site. The total duration of Alinity m STI Assay testing was from November 23, 2021 to June 2, 2022.
Of 2798 specimens, 11 specimens were excluded due to sample handling errors, leaving 2787 specimens for testing. Two specimens generated invalid final results for CT and NG while one additional specimen had an indeterminate CCA result for NG, leaving a total of 2785 results for CT and 2784 results for NG used in calculating the performance.
## Results of CT and NG in Female Urine CCA Study:
When comparing Alinity m STI Assay results against the CCA result, the following PPA and NPA values were reported for CT and NG detection in female urine (summarized in Table 1 and 2):
Table 1: Specimen-specific agreement for Alinity m STI Assay for CT in female urine using CCA analysis
| Symptom Status | N | Alinity+ CCA+ | Alinity- CCA+ | Alinity- CCA- | Alinity+ CCA- | n/N | PPA (95% CI) | n/N | NPA (95% CI) |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Symptomatic | 714 | 47 | 2 | 664 | 1 | 47/49 | 95.9% (86.3, 98.9) | 664/665 | 99.8% (99.2, 100.0) |
| Asymptomatic | 2071 | 130 | 4 | 1934 | 3 | 130/134 | 97.0% (92.6, 98.8) | 1934/1937 | 99.8% (99.5, 99.9) |
| Total | 2785 | 177 | 6 | 2598 | 4 | 177/183 | 96.7% (93.0, 98.5) | 2598/2602 | 99.8% (99.6, 99.9) |
The overall PPA and NPA values, for symptomatic and asymptomatic subjects combined, are 96.7% and 99.8%. The CT clinical sensitivity based on the Patient Infect Status (PIS) was up to 12.3% lower in female urine than in vaginal swab specimens.
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Table 2: Specimen-specific agreement for Alinity m STI Assay for NG in female urine using CCA analysis
| Symptom Status | N | Alinity+ CCA+ | Alinity- CCA+ | Alinity- CCA- | Alinity+ CCA- | n/N | PPA (95% CI) | n/N | NPA (95% CI) |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Symptomatic | 714 | 15 | 0 | 699 | 0 | 15/15 | 100.0% (79.6, 100.0) | 699/699 | 100.0% (99.5, 100.0) |
| Asymptomatic | 2070 | 33 | 1 | 2034 | 2 | 33/34 | 97.1% (85.1, 99.5) | 2034/2036 | 99.9% (99.6, 100.0) |
| Total | 2784 | 48 | 1 | 2733 | 2 | 48/49 | 98.0% (89.3, 99.6) | 2733/2735 | 99.9% (99.7, 100.0) |
The overall PPA and NPA values, for symptomatic and asymptomatic subjects combined, are 98% and 99.9%. The NG clinical sensitivity based on the PIS was up to 9.8% lower in female urine than in vaginal swab specimens.
## Specimen-specific Agreement Performance of Alinity m STI Assay for CT in PreservCyt:
Previously collected gynecological samples stored in ThinPrep (PreservCyt) were used for CCA testing. The samples were prospectively collected and tested with the Alinity m STI Assay in the clinical study used to support K202977.
PreservCyt gynecological samples were aliquoted into the respective comparator NAAT transfer kits, shipped to, and tested at CLIA certified sites (one site per comparator NAAT). The CCA result (2/3 rule determination) for these samples was compared to Alinity m STI Assay test results.
## Results of CT in PreservCyt CCA Study:
When comparing Alinity m STI Assay results against the CCA result, the following PPA and NPA values were reported for CT in PreservCyt samples as summarized in Table 3:
Table 3: Specimen-specific agreement for Alinity m STI Assay for CT in PreservCyt using CCA analysis
| Symptom Status | N | Alinity+ CCA+ | Alinity- CCA+ | Alinity- CCA- | Alinity+ CCA- | n/N | PPA (95% CI) | n/N | NPA (95% CI) |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Symptomatic | 714 | 66 | 1 | 885 | 1 | 66/67 | 98.5% (92.0, 99.7) | 885/886 | 99.9% (99.4, 100.0) |
| Asymptomatic | 2070 | 52 | 1 | 927 | 6 | 52/53 | 98.1% (90.1, 99.7) | 927/933 | 99.4% (98.6, 99.7) |
| Total | 2784 | 118 | 2 | 1812 | 7 | 118/120 | 98.3% (94.1, 99.5) | 1812/1819 | 99.6% (99.2, 99.8) |
The overall PPA and NPA values, for symptomatic and asymptomatic subjects combined, are 98.3% and 99.6%. The CT clinical sensitivity based on the PIS was up to 10.7% lower in PreservCyt than in vaginal swab specimens.
## Positive and Negative Predictive Values for CT and NG Analytes in Tested Specimen Types
The positive and negative predictive values (PPV and NPV, respectively) for CT and NG in female urine and CT in gynecological samples stored in PreservCyt were calculated for hypothetical prevalence values ranging from 0.5% to 30% (see Tables 4 and 5).
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Table 4. CT Positive and Negative Predictive Value Using Hypothetical Prevalence for Urogenital Specimens
| Specimen Type | Category | 0.5% | 1.0% | 2.0% | 5.0% | 10.0% | 15.0% | 20.0% | 25.0% | 30.0% |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| CCV | PPV (%) | 36.9 | 54.0 | 70.3 | 85.9 | 92.8 | 95.3 | 96.7 | 97.5 | 98.0 |
| CCV | NPV (%) | 100.0 | 100.0 | 100.0 | 99.9 | 99.8 | 99.7 | 99.5 | 99.3 | 99.2 |
| SCV | PPV (%) | 40.0 | 57.2 | 73.0 | 87.5 | 93.6 | 95.9 | 97.1 | 97.8 | 98.3 |
| SCV | NPV (%) | 100.0 | 100.0 | 100.0 | 99.9 | 99.8 | 99.7 | 99.6 | 99.5 | 99.4 |
| E | PPV (%) | 43.2 | 60.5 | 75.6 | 88.9 | 94.4 | 96.4 | 97.4 | 98.1 | 98.5 |
| E | NPV (%) | 100.0 | 99.9 | 99.9 | 99.7 | 99.4 | 99.0 | 98.6 | 98.2 | 97.7 |
| PreservCyt | PPV (%) | 42.8 | 60.1 | 75.3 | 88.7 | 94.3 | 96.3 | 97.4 | 98.0 | 98.5 |
| PreservCyt | NPV (%) | 99.9 | 99.9 | 99.8 | 99.4 | 98.7 | 97.9 | 97.0 | 96.1 | 95.0 |
| FU | PPV (%) | 52.2 | 68.7 | 81.6 | 92.0 | 96.0 | 97.5 | 98.2 | 98.6 | 98.9 |
| FU | NPV (%) | 99.9 | 99.9 | 99.7 | 99.3 | 98.5 | 97.6 | 96.6 | 95.6 | 94.4 |
| MU | PPV (%) | 49.4 | 66.3 | 79.9 | 91.1 | 95.6 | 97.2 | 98.0 | 98.5 | 98.8 |
| MU | NPV (%) | 100.0 | 100.0 | 99.9 | 99.9 | 99.7 | 99.5 | 99.3 | 99.1 | 98.8 |
CCV= Clinician-collected vaginal swab; SCV= Self-collected vaginal swab; E = Endocervical swab; PreservCyt = Gynecological samples stored in PreservCyt; FU= Female Urine; MU = Male Urine. Shaded cells (data supporting the new claims in this submission) are added to tables originally produced for the predicate device, K202977.
Table 5. NG Positive and Negative Predictive Value Using Hypothetical Prevalence for Urogenital Specimens
| Specimen Type | Category | 0.5% | 1.0% | 2.0% | 5.0% | 10.0% | 15.0% | 20.0% | 25.0% | 30.0% |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| CCV | PPV (%) | 69.2 | 81.9 | 90.1 | 95.9 | 98.0 | 98.7 | 99.1 | 99.3 | 99.5 |
| CCV | NPV (%) | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| SCV | PPV (%) | 61.1 | 75.9 | 86.4 | 94.3 | 97.2 | 98.2 | 98.7 | 99.0 | 99.3 |
| SCV | NPV (%) | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| E | PPV (%) | 66.9 | 80.3 | 89.2 | 95.5 | 97.8 | 98.6 | 99.0 | 99.3 | 99.4 |
| E | NPV (%) | 100.0 | 99.9 | 99.8 | 99.6 | 99.2 | 98.7 | 98.2 | 97.6 | 96.9 |
| PreservCyt | PPV (%) | 92.8 | 96.3 | 98.1 | 99.3 | 99.6 | 99.8 | 99.8 | 99.9 | 99.9 |
| PreservCyt | NPV (%) | 100.0 | 99.9 | 99.9 | 99.7 | 99.4 | 99.0 | 98.6 | 98.2 | 97.7 |
| FU | PPV (%) | 67.5 | 80.6 | 89.4 | 95.6 | 97.9 | 98.6 | 99.0 | 99.3 | 99.4 |
| FU | NPV (%) | 100.0 | 99.9 | 99.8 | 99.5 | 98.9 | 98.3 | 97.6 | 96.8 | 96.0 |
| MU | PPV (%) | 77.3 | 87.3 | 93.3 | 97.3 | 98.7 | 99.2 | 99.4 | 99.6 | 99.7 |
| MU | NPV (%) | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
CCV= Clinician-collected vaginal swab; SCV= Self-collected vaginal swab; E = Endocervical swab; PreservCyt = Gynecological samples stored in PreservCyt; FU= Female Urine; MU = Male Urine. Shaded cells (data supporting the new claims in this submission) are added to tables originally produced for the predicate device, K202977.
# D Clinical Cut-Off:
Not applicable.
Food and Drug Administration
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www.fda.govK222379 - Page 13 of 16
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# E Expected Values/Reference Range:
Positivity of CT and NG in Female Urine at Collection Sites:
A summary of the positivity for CT and NG in female urine and CT in PreservCyt specimens, as determined by the Alinity m STI Assay for each specimen type, is presented by collection site and overall in Table 6 and 7.
Table 6: Positivity of Analytes in Female Urine samples as determined by Alinity m STI Assay by Collection Site
| | % Positivity (No. Pos / No. Tested) | |
| --- | --- | --- |
| Site | CT | NG |
| 01 | 1.9 (2/105) | 1.0 (1/105) |
| 02 | 8.4 (33/394) | 1.8 (7/394) |
| 03 | 5.2 (5/96) | 1.0 (1/96) |
| 04 | 11.8 (70/594) | 3.5 (21/594) |
| 05 | 4.9 (23/466) | 1.3 (6/466) |
| 06 | 9.4 (8/85) | 1.2 (1/85) |
| 07 | 2.3 (7/305) | 1.0 (3/305) |
| 08 | 6.0 (23/383) | 2.4 (9/382) |
| 09 | 1.9 (2/104) | 0.0 (0/104) |
| 10 | 1.8 (2/109) | 0.0 (0/109) |
| 11 | 6.5 (2/31) | 0.0 (0/31) |
| 12 | 4.0 (3/75) | 1.3 (1/75) |
| 13 | 0.0 (0/20) | 0.0 (0/20) |
| 14 | 5.6 (1/18) | 0.0 (0/18) |
| All | 6.5 (181/2785) | 1.8 (50/2784) |
Positivity of CT in Gynecological Samples Collected at Clinical Study Sites:
Table 7: Positivity of CT in PreservCyt Specimens as Determined by Alinity m STI Assay by Collection Site
| | % Positivity (#positive/# tested) |
| --- | --- |
| Site | PreservCyt |
| 01 | 2.8 (1/36) |
| 02 | 3.4 (9/268) |
| 03 | 2.7 (6/224) |
| 04 | 15.8 (3/19) |
| 05 | 6.8 (18/263) |
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| 06 | 0.0 (0/4) |
| --- | --- |
| 07 | 2.9 (9/310) |
| 08 | 1.9 (2/105) |
| 09 | 9.3 (10/108) |
| 10 | 5.7 (6/106) |
| 11 | 0.0 (0/18) |
| 12 | 4.2 (2/48) |
| 13 | 6.8 (3/44) |
| 14 | 0.0 (0/39) |
| 15 | 8.1 (3/37) |
| 16 | 11.8 (2/17) |
| 17 | 0.0 (0/41) |
| 18 | 0.0 (0/5) |
| 19 | 11.1 (1/9) |
| 20 | - |
| 21 | 6.1 (8/132) |
| 22 | 2.9 (1/34) |
| 23 | 9.8 (12/122) |
| 24 | 2.6 (1/38) |
| 25 | 10.6 (5/47) |
| 26 | 7.4 (2/27) |
| 27 | 6.0 (5/83) |
| 28 | 11.7 (27/230) |
| 29 | 7.0 (6/86) |
| 30 | 20.0 (13/65) |
| 31 | 12.7 (9/71) |
| 32 | 9.8 (5/51) |
| 33 | 25.5 (12/47) |
| All | 6.6 (181/2734) |
PreservCyt = gynecological samples stored in PreservCyt
F Other Supportive Instrument Performance Characteristics Data:
Not applicable.
Food and Drug Administration
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www.fda.govK222379 - Page 15 of 16
{15}
VIII Proposed Labeling:
The proposed labeling for the following new claims added in this submission are acceptable:
- CT in female urine
- NG in female urine
- CT in gynecological samples stored in ThinPrep (PreservCyt)
IX Conclusion:
The submitted information in this premarket notification is complete and supports a substantial equivalence decision.
Food and Drug Administration
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Silver Spring, MD 20993-0002
www.fda.govK222379 - Page 16 of 16
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Select multiple rows in the results table (aim for under ~10), then open the PDF Viewer tab. Ask one question — it goes to all selected devices in parallel, each with citations. This is the fastest way to compare and contrast devices: training data, PCCP scope, how they handled adding new scanners, and so on.
What does the side-by-side PDF viewer mode do?
Select multiple devices, open the PDF viewer tab, and ask one question (e.g., "Describe the training data"). It queries all selected devices simultaneously with citations, so you can compare and contrast quickly.
6. Collections
With rows selected, go to the Collections tab and create a labeled collection (e.g., "Cobb Angle Project"). Reload that selection any time — before a client call, pull up the collection and ask questions across all of its devices at once.
How do you save a set of selected devices for later use?
Select the rows, go to the Collections tab, and create a labeled collection (e.g., "Cobb Angle Project"). You can reload the selection anytime and carry it into the PDF viewer and other tabs that support selections.
7. Product codes and the regulations tree
Click a product code in the results to jump to it in the regulations tree — identification text, sibling product codes, and devices you can open in a PDF viewer on the right. Click a regulation number to see its identification, special controls, and related product codes. You can also search by product code or regulation number at the top of the tree. Always read the special controls if any exist for your device — it broadens your search and sharpens pre-kickoff research.
What can you do from the regulations tree view?
Browse product codes and regulation numbers, read the identification text and special controls, browse sibling product codes, open device PDFs on the right, and search by product code or regulation number at the top of the tree.
8. Chart view
Click Show Chart and segment by regulation number (or product code) to see which regulations dominate your result set. Clicking a regulation takes you into the regulations tree. Great for spotting that most matches are, say, hardware laparoscopic devices — a cue to go back and filter.
How do you see which regulations dominate a search result set?
Click "Show Chart" and segment by Regulation Number. Clicking a regulation takes you to the regulations tree.
9. The predicate graph
Open the Predicates tab for a family-tree view of predicate relationships. Click a node to trace its parents and children; selections from search carry over pre-selected. Commonly predicated devices are worth reading — a lot of people predicated them for a reason. The visual lineage is also handy on client calls, e.g. to show how a predicate family evolved and justify why your predicate still holds.
In the predicate graph, why are commonly predicated devices worth reading?
A lot of people predicated them for a reason. Clicking a node traces parents and children, and selections from search carry over pre-selected.
10. Embeddings: the galaxy map
The Embeddings tab plots every matching document in a 2-D "galaxy map" where semantically similar devices cluster together. Hover or click clusters to explore, and let AI label the clusters for you. Embeddings beat product codes for grouping: two devices can carry different product codes (LLZ vs. QIH) yet do the same thing — the embedding captures the meaning of the intended use and device story. This is also exactly how retrieval-augmented generation (RAG) works under the hood, and it makes a great visual on client calls.
Try it yourself
Head to the search page and work through a few of these AI/ML fuzzy searches to build intuition: perivascular fat on CT · aortic valve calcification opportunistic screening on noncontrast CT · breast cancer prediction on digital pathology slides · autism detection · gestational age prediction · a hearing aid that can also detect a pulse · foundation model based analysis of ECG · large language models · penetration test. Watch how the relevance scores, intended use, and AI Performance tables tell you when results stop being meaningful.
