The Quantisal™ Oral Fluid Collection Device is intended for the collection, preservation, and transport of oral fluid specimens for drugs of abuse testing. This device is for prescription use only.
Device Story
The Quantisal™ Oral Fluid Collection Device is a manual specimen collection tool used in clinical settings. It consists of a cellulose pad attached to a polypropylene stem and a transport tube containing 3 mL of preservative buffer. A clinician or operator places the pad under the patient's tongue until a blue indicator in the stem window confirms saturation (1 mL of oral fluid). The pad is then transferred to the transport tube, resulting in a 1:4 dilution. The device preserves the specimen for subsequent laboratory analysis (e.g., LC-MS/MS or GC-MS) to detect drugs of abuse. It facilitates standardized sample collection and maintains analyte stability during transport to a laboratory, aiding healthcare providers in identifying drug use.
Clinical Evidence
No clinical data. Bench testing only. Stability studies performed to validate extended refrigerated storage claims for THC, benzoylecgonine, cocaine, morphine, codeine, oxycodone, hydrocodone, 6-acetylmorphine, phencyclidine, amphetamine, methamphetamine, buprenorphine, methadone, benzodiazepines, and tramadol. Previous drug recovery and sample volume data from K200801 cited as supporting evidence.
Technological Characteristics
Materials: cellulose pad, polypropylene stem, preservative buffer, polypropylene transport tube. Principle: passive absorption of oral fluid until volume saturation indicated by color change. Form factor: handheld collector with transport tube. Connectivity: none. Sterilization: not specified. Software: none.
Indications for Use
Indicated for the collection, preservation, and transport of oral fluid specimens for drugs of abuse testing in patients requiring such testing. Prescription use only.
Regulatory Classification
Identification
A blood specimen collection device is a device intended for medical purposes to collect and to handle blood specimens and to separate serum from nonserum (cellular) components prior to further testing. This generic type device may include blood collection tubes, vials, systems, serum separators, blood collection trays, or vacuum sample tubes.
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FDA
U.S. FOOD & DRUG
ADMINISTRATION
# 510(k) SUBSTANTIAL EQUIVALENCE DETERMINATION DECISION SUMMARY
ASSAY ONLY
## I Background Information:
A 510(k) Number
K232898
B Applicant
Immunalysis Corporation
C Proprietary and Established Names
Quantisal™ Oral Fluid Collection Device
D Regulatory Information
| Product Code(s) | Classification | Regulation Section | Panel |
| --- | --- | --- | --- |
| PJD | Class II | 21 CFR 862.1675 - Blood Specimen Collection Device | CH - Clinical Chemistry |
## II Submission/Device Overview:
A Purpose for Submission:
Modification to an existing device.
B Measurand:
Not applicable.
C Type of Test:
For the collection, preservation, and transport of oral fluid specimens with drugs of abuse testing.
## III Intended Use/Indications for Use:
A Intended Use(s):
Food and Drug Administration
10903 New Hampshire Avenue
Silver Spring, MD 20993-0002
www.fda.gov
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See Indications for Use below.
## B Indication(s) for Use:
The Quantisal™ Oral Fluid Collection Device is intended for the collection, preservation, and transport of oral fluid specimens for drugs of abuse testing. This device is for prescription use only.
## C Special Conditions for Use Statement(s):
Rx - For Prescription Use Only
The Quantisal Oral Fluid Collection Devices has been previously cleared for the measurement of THC, Benzoylecgonine, Cocaine, Morphine, Codeine, Oxycodone, Hydrocodone, 6-acetylmorphine, Phencyclidine, Amphetamine, Methamphetamine, Buprenorphine, Methadone, Benzodiazepines and Tramadol. Use of the device for the collection, preservation, and transport of any other analyte for drugs of abuse testing should be validated prior to such use.
## D Special Instrument Requirements:
Not applicable.
## IV Device/System Characteristics:
### A Device Description:
The Quantisal™ Oral Fluid Collection Device is intended for the collection, preservation, and transport of oral fluid specimens for drugs of abuse testing. The Quantisal device is designed to collect 1 mL ± 10% oral fluid sample. Each device contains (a) cellulose pad affixed to a polypropylene stem and (b) one transportation tube.
### B Principle of Operation:
The Quantisal device is designed to collect 1 mL ± 10% oral fluid sample. Each device contains a collector made up of a cellulose pad with cellulose extending into the interior of a polypropylene stem. Blue dye is pre-applied to the cellulose inside the stem. When the cellulose pad is placed under the tongue of a donor, oral fluid is collected via passive diffusion. Upon saturating the cellulose pad, oral fluid migrates along the cellulose tail through capillary action and dissolves the dye. As oral fluid collection continues, the dye becomes visible in the window on the stem. Specimen collection is complete when the window is completely blue. The collector is then removed from the mouth. The pad is transferred into provided polypropylene transport tube which contains 3 mL of preservative buffer. The preservative buffer serves as a reservoir into which analytes may distribute, permitting recovery of analytes from the pad during the time the specimens are in storage or being transported.
The Quantisal device collects 1 mL sample of neat oral fluid and dilutes it with 3 mL of preservative buffer in each tube. This results in a 1 to 4 dilution factor.
### V Substantial Equivalence Information:
K232898 - Page 2 of 7
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A Predicate Device Name(s):
Quantisal™ Oral Fluid Collection Device
B Predicate 510(k) Number(s):
K200801
C Comparison with Predicate(s):
| Device & Predicate Device(s): | K232898 | K200801 |
| --- | --- | --- |
| Device Trade Name | Quantisal™ Oral Fluid Collection Device | Same |
| General Device Characteristic Similarities | | |
| Intended Use/Indications for Use | For the collection, preservation, and transport of oral fluid specimens for drugs of abuse testing. | Same |
| Materials | Cellulose pad, polypropylene stem, preservative buffer and transport tube | Same |
| Body Contact | Cellulose pad placed under the tongue for up to 10 minutes | Same |
| Sample Collection | A cellulose pad is placed under the tongue for collection until blue dye visible in the window of the stem | Same |
| Transport Tube | Polypropylene tube containing preservative buffer | Same |
| Sample Matrix | Human oral fluid | Same |
| Collector | Collector containing one pad | Same |
| Sample Volume | 1 mL | Same |
| General Device Characteristic Differences | | |
| Refrigerated Sample Stability | Benzoylecgonine, Morphine, Codeine, Oxycodone, Hydrocodone, 6-Acetylmorphine, | Benzoylecgonine, Morphine, Codeine, Oxycodone, Hydrocodone, 6-Acetylmorphine, Phencyclidine, |
K232898 - Page 3 of 7
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| | Phencyclidine, Amphetamine, Methamphetamine, Buprenorphine, Methadone, Benzodiazepines, and Tramadol are stable for 12 months when stored refrigerated (2-8°C, 36-46°F).
THC is stable for 2 months and Cocaine for 1 month when stored refrigerated (2-8°C, 36-46°F). | Amphetamine, Methamphetamine, Buprenorphine, Methadone, Benzodiazepines, and Tramadol are stable for 3 months when stored refrigerated (2-8°C, 36-46°F)
The stability of THC and Cocaine are the same. |
| --- | --- | --- |
VI Standards/Guidance Documents Referenced:
None.
VII Performance Characteristics (if/when applicable):
A Analytical Performance:
1. Precision/Reproducibility:
Not applicable.
2. Linearity:
Not applicable.
3. Analytical Specificity/Interference:
Not applicable.
4. Assay Reportable Range:
Not applicable.
5. Traceability, Stability, Expected Values (Controls, Calibrators, or Methods):
Sample Volume
Data submitted in k200801 to support that a consistent sample volume is collected supports the sample volume claims for the candidate device.
Sample Collection Time
K232898 - Page 4 of 7
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Data submitted in k200801 to support a consistent sample collection time supports the sample collection time claims for the candidate device.
## Drug Recovery
The sponsor previously provided in k200801 drug recovery data for THC, benzoylecgonine, cocaine, morphine, codeine, oxycodone, hydrocodone, 6-acetylmorphine, phencyclidine, amphetamine, methamphetamine, buprenorphine, methadone, nordiazepam, and tramadol which support the drug recovery claims for the candidate device. Use of this device with a drugs of abuse assay intended to measure any other analytes must be validated prior to such use.
## Oral Fluid Sample Stability
The sponsor evaluated the stability of the previously cleared analytes and extended their stability claims as follows:
Based upon these results, the sponsor has the following stability:
| Drugs | Initial Concentration (ng/mL) | Stability at 8-25°C | Stability at 2-8°C |
| --- | --- | --- | --- |
| THC | 6.0 | 10 days | 2 months |
| Benzoylecgonine | 22 | 10 days | 12 months |
| Cocaine | 22 | 5 days | 1 month |
| Morphine | 45 | 10 days | 12 months |
| Codeine | 46 | 10 days | 12 months |
| Oxycodone | 47 | 10 days | 12 months |
| Hydrocodone | 46 | 10 days | 12 months |
| 6-acetylmorphine | 5.8 | 10 days | 12 months |
| Phencyclidine | 14 | 10 days | 12 months |
| Amphetamine | 75 | 10 days | 12 months |
| Methamphetamine | 74 | 10 days | 12 months |
| Buprenorphine | 4.5 | 10 days | 12 months |
| Methadone | 29 | 10 days | 12 months |
| Benzodiazepines | 7.5 | 10 days | 12 months |
| Tramadol | 75 | 10 days | 12 months |
Use of this device with a drug of abuse assay intended to measure any other analytes must be validated by the assay manufacturer prior to such use.
## Clinical Specimens Testing
The sponsor previously provided in k200801 information on the device performance versus expectoration for THC, benzoylecgonine, cocaine, morphine, codeine, oxycodone, hydrocodone, 6-acetylmorphine, phencyclidine, amphetamine, methamphetamine, buprenorphine, methadone, benzodiazepines, and tramadol which also supports the performance versus expectoration claims for the candidate device.
K232898 - Page 5 of 7
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Use of this device with a drugs of abuse assay intended to measure any other analytes must be validated by the assay manufacturer prior to such use.
## Biocompatibility
The duration of body contact, materials of construction, design, physico-chemical properties and the manufacturing method of Quantisal™ Oral Fluid Collection Device is identical to the predicate device k200801.
6. Detection Limit:
Not applicable.
7. Assay Cut-Off:
Not applicable.
## B Comparison Studies:
1. Method Comparison with Predicate Device:
Not applicable.
2. Matrix Comparison:
Not applicable.
## C Clinical Studies:
1. Clinical Sensitivity:
Not applicable.
2. Clinical Specificity:
Not applicable.
3. Other Clinical Supportive Data (When 1. and 2. Are Not Applicable):
Not applicable.
## D Clinical Cut-Off:
Not applicable.
## E Expected Values/Reference Range:
Not applicable.
K232898 - Page 6 of 7
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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.
K232898 - Page 7 of 7
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Learn the FDA Browser
Two short videos show you everything — or skip straight to the written tutorial if you'd rather read. You can reopen this any time from the Tutorial button in the top bar.
Part 1 — Search, results, and everyday workflows 16 min
Part 2 — Embeddings: the galaxy map 3 min
1. Search: exact and fuzzy
Type a phrase like "coronary artery calcification" into the search box. You get two kinds of results. Exact results match the literal phrase — prefix searches work ("coronary artery calcificati") but suffix searches do not. Fuzzy results match on the meaning and intent of your phrase rather than the exact words, and are sorted by relevance score. Hover over the Exact or Fuzzy badge on any row to see exactly why it matched.
Use the checkboxes above the results to narrow: SaMD keeps only software-only devices, AI / ML keeps only devices with AI.
Exact vs. fuzzy search: what's the difference?
Exact matches on the literal phrase (prefix search works, suffix does not). Fuzzy matches on the meaning and intent of the phrase rather than the exact words. Hover over the badge on any row to see why it matched.
You search "coronary artery calcification" and want only software devices with AI. What two filters do you apply?
Narrow by SaMD (software-only devices), then narrow by AI/ML (devices with AI).
2. The results table
Scroll right in the results table. The intended use is extracted for you — no need to open the PDF. The device story gives a high-level snapshot of what the device does and how it's used. The AI Performance sub-table shows each output name, acceptance criteria, observed values, and development/test dataset descriptions — the same format Innolitics uses for regulatory strategy outputs, and the fastest high-level fingerprint of an AI device. It is AI-generated but has been very reliable in practice.
Where do you find a device's intended use without opening the PDF?
Scroll right in the search results table. The intended use column is extracted for you; no need to dig into the 510(k) summary PDF.
What does the AI Performance sub-table show, and why is it useful?
Output name, acceptance criteria, observed values, development dataset description, and test dataset description. It's the same format we use for regulatory strategy output and Fast 510(k) input, and the fastest high-level fingerprint of an AI device. AI-generated but reliable in practice.
3. Judging fuzzy relevance
Fuzzy results trail off in relevance as you scroll. Use three signals to decide how far down to go: the fuzzy badge explanations, the intended use column, and whether your target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, you're past the relevant zone. A top hit with a low score (~0.4) and a stretched explanation is a hint the closest predicates are far away — the project may be headed for De Novo. Note the fuzzy search is a pattern match: it doesn't handle negation ("not") well, and hardware devices can appear — filter by SaMD/AI ML to cut them.
How do you judge how far down fuzzy search results to go?
Use the relevancy signals: the fuzzy badge explanations, the intended use column, and whether the target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, results are trailing off in relevancy.
4. Device detail page: chat and citations
Click a device name to open its detail page: device facts on the left, a chat window on the right. Ask something like "Describe the training data". The answer carries little citation bubbles — click one to jump to the highlighted passage in the source PDF, so you can verify every AI answer against the document. There's also a Download PDF button for sharing.
How do you verify an AI chat answer on the device detail page?
Click the citation bubbles to jump to the relevant highlight in the source document.
Reading rule for every project: how many summaries do you read in full?
At least the three most relevant 510(k) or De Novo summaries, in full. After that, use targeted chat questions to confirm your memory quickly. The tool supports this professional habit — it doesn't replace it.
5. Side-by-side comparison
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.