The ATAC PAK Uric Acid Reagent Kit, the ATAC Calibrator and the ATAC 8000 Random Access Chemistry System are intended for use as a system for the quantitative determination of uric acid in serum and plasma. Unc acid results are for the diagnosis and treatment of numerous renal and metabolic disorders, including renal failure, gour, leukemia, psoriasis, starvation or other wasting conditions, and of patients receiving cytotoxic drugs. This reagent is intended to be used by trained personnel in a professional setting and is not intended for home use.
Device Story
ATAC PAK Uric Acid Reagent Kit used with ATAC 8000 Random Access Chemistry System; performs quantitative uric acid determination in serum/plasma samples. Principle: enzymatic oxidation coupled with Trinder indicator reaction; increase in absorbance at 510 nm proportional to uric acid concentration. Operated by trained personnel in professional clinical settings. Output: uric acid concentration values used by clinicians to diagnose/monitor renal and metabolic disorders. Benefits: provides diagnostic data for clinical decision-making regarding patient metabolic status.
Clinical Evidence
Bench testing only. Linearity established from 0.2 to 25 mg/dL (r=0.9998). Precision studies (n=60 per sample) showed within-run CVs of 1.7-5.0% and total CVs of 3.4-9.8%. Method comparison against a commercially available reagent (n=120) yielded a regression slope of 0.987 and sy.x of 0.29 mg/dL. Detection limit documented at 0.2 mg/dL. Stability claims supported by 14-day on-board reagent stability and 3-day calibration stability testing.
Technological Characteristics
Enzymatic oxidation/Trinder indicator chemistry; photometric detection at 510 nm. System includes reagent kit, calibrator, and ATAC 8000 analyzer. Quantitative, automated chemistry system. No specific material standards or software architecture details provided.
Indications for Use
Indicated for quantitative determination of uric acid in serum and plasma for diagnosis and treatment of renal and metabolic disorders (e.g., renal failure, gout, leukemia, psoriasis, starvation, wasting conditions, patients on cytotoxic drugs). For professional use only; not for home use.
Regulatory Classification
Identification
A uric acid test system is a device intended to measure uric acid in serum, plasma, and urine. Measurements obtained by this device are used in the diagnosis and treatment of numerous renal and metabolic disorders, including renal failure, gout, leukemia, psoriasis, starvation or other wasting conditions, and of patients receiving cytotoxic drugs.
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JUL 15 2003
K 031044
Brea, CA 92821 T (714) 672-3553 F (714) 672-3554
## SUMMARY OF 510(K) SAFETY AND EFFECTIVENESS INFORMATION
This summary of 510(k) safety and effectiveness information is being submitted in accordance with the requirements of SMDA 1990 and 21 CFR 807.92.
The ATAC PAK Uric Acid Reagent Kit is intended for the quantitative determination of uric acid in serum and plasma. Uric acid results are for the diagnosis and treatment of numerous renal and metabolic disorders, including renal failure, gou, leukemia, psoriasis, starvation or other wasting conditions, and of patients receiving cytotoxic drugs. The ATAC PAK Uric Acid Reagent determines uric acid through the exzymatic oxidation coupled with a Trinder indicator reaction. The resulting increase in absorbance at 510 mm is proportional to the uric acid concentration of the sample.
The ATAC PAK Uric Acid Reagent Kit and ATAC Calibrator are substantially equivalent to the Roche Uric Acid Reagent Kit, product no. 908241 callbrated with the C.f.a.s. Calibrator, product no. 759350, which are marked by Roche Diagnostics of Indianapolis, IN. The effectiveness of ATAC PAK Uric Acid Reagent Kit on the ATAC 8000 Random Access Chemistry System is shown by the following studies.
The recovery of uric acid using the ATAC PAK Uric Acid Reagent is linear from 0.2 to 25 mg/dL, as shown by the recovery of linearity standards that span the usable range. Regression statistics, which are forced through the origin, compare standard recoveries to standard values. These statistics are shown below.
(ATAC Recoveries) = 0.996 x (Standard Value), r = 0.9998, sy.x = 0.18 mg/dL, n = 30
Precision is demonstrated by the replicate assay of commercially available control serum on two separate instruments. Precision statistics, calculated analogous to the method described in NCCLS Guideline EP3-T, are shown below.
| Sample | n | mean | Within Run | | Total | |
|---------|----|------|------------|------|-------|------|
| | | | 1SD | %CV | 1SD | %CV |
| Serum 1 | 60 | 2.3 | 0.12 | 5.0% | 0.23 | 9.8% |
| Serum 2 | 60 | 6.9 | 0.16 | 2.3% | 0.30 | 4.4% |
| Serum 3 | 60 | 11.3 | 0.19 | 1.7% | 0.38 | 3.4% |
Precision of Uric Acid Recoveries in mg/dr
Mixed serum and plasma speciments collected from adult patients were assayed for uric acid using the ATAC 8000 Random Access Chemistry System and another commercially available method. Results were compared by least squares linear regression and the following statistics were obtained.
ATAC 8000 = - 0.11 mg/dL + 0.987 x Competitive Reagent syx = 0.29 mg/dL n=120 range = 1.8 - 18.8 mg/dL
The detection limit of 0.2 mg/dL is documented the repetitive assay of a diluted serum pool. The observed standard deviation of a 30 replicate within run precision study was 0.1 mg/dL. Consequently, the detection limit is reported as twice the round-off error of the assay.
The 14 day on board reagent stablity claim is documented through the assay of serum controls over the claimed periods. In all cases, the observed change in control recoveries was less than 0.3 mg/dL.
The 3 day calibration stability claim is documented through the assay of serum controls over the claimed periods. In all cases, the total imprecision of wic acid recoveries over the test periods are less than 0.3 mg/dL or 5%.
Wynn Stocking
Manager of Regulatory Affairs July 11, 2003
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Image /page/1/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a circular seal with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES • USA" arranged around the perimeter. Inside the circle is a stylized image of three human profiles facing right, with flowing lines suggesting movement or progress.
JUL 15 2003
Food and Drug Administration 2098 Gaither Road Rockville MD 20850
Mr. Wynn Stocking Manager, Regulatory Affairs Elan Diagnostics 1075 W. Lambert Road - Building D Brea. CA 92821
Re: k031044
> Trade/Device Name: ATAC PAK Uric Acid Reagent Regulation Number: 21 CFR 862.1150 Regulation Name: Calibrator Regulatory Class: Class II Product Code: KNK: JIX Dated: March 31, 2003 Received: April 30, 2003
Dear Mr. Stocking:
We have reviewed vour Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food. Drug, and Cosmetic Act (Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. The general controls provisions of the Act include requirements for annual registration. Iisting of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to such additional controls. Existing major regulations affecting your device can be found in Title 21, Code of Federal Regulations (CFR), Parts 800 to 895. In addition, FDA may publish further announcements concerning your device in the Federal Register.
Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Parts 801 and 809); and good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820).
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### Page 2 -
This letter will allow you to begin marketing your device as described in your Section 510(k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification for your device and thus, permits your device to proceed to the market.
If you desire specific information about the application of labeling requirements to your device. or questions on the promotion and advertising of your device, please contact the Office of In Vitro Diagnostic Device Evaluation and Safety at (301) 594-3084. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). You may obtain other general information on your responsibilities under the Act from the Division of Small Manufacturers, International and Consumer Assistance at its toll-free number (800) 638-2041 or (301) 443-6597 or at its Internet address http://www.fda.gov/cdrh/dsma/dsmamain.html.
Sincerely vours.
Steven Putman
Steven I. Gutman, M.D., M.B.A. Director Office of In Vitro Diagnostic Device Evaluation and Safety Center for Devices and Radiological Health
Enclosure
ﺎﺕ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟ �
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# Kosioitt
510(k) Number (if known):
Device Name:
ATAC PAK Uric Acid Reagent
Indications for Use:
The ATAC PAK Uric Acid Reagent Kit, the ATAC Calibrator and the ATAC 8000 Random Access Chemistry System are intended for use as a system for the quantitative determination of uric acid in serum and plasma. Unc acid results are for the diagnosis and treatment of numerous renal and metabolic disorders, including renal failure, gour, leukemia, psoriasis, starvation or other wasting conditions, and of patients receiving cytotoxic drugs.
This reagent is intended to be used by trained personnel in a professional setting and is not intended for home use.
Division Sign-Off
Office of In Vitro Diagnostic Device
Evaluation and Safety
510(k) K031014
Division Sign-Off
Office of In Vitro Diagnostic Device
Evaluation and Safety
510(k)
#### (PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Prescription Use
(Per 21 CFR 801.109)
OR
Over-The-Counter Use
(Optional Format 1-2-96)
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.
