TUTTNAUER EHS SERIES TABLE-TOP AUTOCLAVE, MODEL 2540
Applicant
Tuttnauer U.S.A Co, Ltd.
Product Code
FLE · General Hospital
Decision Date
Jul 25, 2002
Decision
SESE
Submission Type
Abbreviated
Regulation
21 CFR 880.6880
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
The Tuttnauer 2540 EHS Series Table-top Autoclave is intended to provide sterilization of medical and dental instruments (wrapped and unwrapped) including complex lumened devices such as dental handpieces, porous, hollow loads and to sterilize liquids for non-clinical applications. Cycle parameters are as follows: [Cycle table data omitted for brevity as per instructions to concatenate]
Device Story
Table-top steam sterilizer; provides onboard steam generation. Inputs: medical/dental instruments (wrapped/unwrapped), lumened devices, porous/hollow loads, liquids. Operation: steam introduced directly into chamber; microprocessor controls cycle time, temperature, and pressure. Output: sterilized instruments/liquids. Used in clinical/non-clinical settings; operated by healthcare staff. Monitors include temp/pressure gauges, digital display, and printer. Benefits: eliminates wait time for water boiling; provides validated sterilization cycles for various load configurations.
Clinical Evidence
Bench testing only. Validation studies conducted in accordance with ANSI/AAMI ST55 demonstrated successful sterilization for all tested cycles, including the new 4-minute cycle for wrapped, non-lumened instruments.
Technological Characteristics
Steam sterilizer; components include pressure vessel with steam jacket, heating elements, dual-chamber water reservoir, water pump, and vacuum pump. Microprocessor-controlled cycle parameters (time, temp, pressure). Digital display and printer for monitoring. Connectivity: standalone. Sterilization: steam.
Indications for Use
Indicated for sterilization of medical and dental instruments (wrapped and unwrapped), including complex lumened devices (e.g., dental handpieces), porous, and hollow loads; also indicated for sterilization of liquids for non-clinical applications.
Regulatory Classification
Identification
A steam sterilizer (autoclave) is a device that is intended for use by a health care provider to sterilize medical products by means of pressurized steam.
{0}------------------------------------------------
JUL 2 5 2002
K021504
#### 510(k) Summary
| Submitter: | Tuttnauer USA Co. Ltd.<br>25 Power Drive<br>Hauppauge, NY 11788 |
|----------------------|-----------------------------------------------------------------|
| | |
| | Phone: 800-624-5836<br>Fax: 516-737-0720 |
| Contact Name: | Robert R. Basile |
| Date Prepared: | May 9, 2000 |
| Common Name: | Electronic pre-vacuum autoclave, table-top steam sterilizer |
| Trade Name: | Tuttnauer 2540 EHS Series Table-Top Autoclave |
| Classification Name: | Steam Sterilizer<br>Class II Device - 21 C.F.R. § 880.6880 |
#### Substantial Equivalence:
The Tuttnauer 2540 EHS Table-Top Autoclave is substantially equivalent to the following currently marketed device:
| Company | Product Name | 510(k) Clearance Number |
|------------------------|------------------------------|-------------------------|
| Tuttnauer USA Co. Ltd. | 2540 EHS Table-Top Autoclave | K003470 |
#### General Description:
The Tuttnauer 2540 EHS Table-top Autoclave is a steam sterilizer that provides an onboard steam generation capability. It is designed for sterilization of medical and dental instruments (wrapped and unwrapped), including complex lumened devices (such as dental handpieces), porous, hollow loads and to sterilize liquids for non-clinical applications. The sterilization medium is steam, which is directly introduced into the sterilization chamber. This eliminates the need to wait for water introduced into the chamber to boil and reach sterilization parameters.
#### Intended Use:
The Tuttnauer 2540 EHS Series Table-top Autoclave is intended to provide sterilization of medical and dental instruments (wrapped and unwrapped) including complex lumened devices such as dental handpieces, porous, hollow loads and to sterilize liquids for non-clinical applications. Cycle parameters are as follows:
{1}------------------------------------------------
| Cycle | Ste. Temp & Range<br>(°F) | Press. &<br>Range (Kpa) | Time<br>(min) | Vacuum<br>(kPa.) | Dry Time<br>(min) | Load<br>Configuration |
|--------------------------------------------------|---------------------------|-------------------------|---------------|------------------|-------------------|--------------------------------------------------------------------------------------------------------------------------------|
| 1. Unwrapped<br>273 | 273 (273-279) | 305 (305 - 330) | 3-1/2 | 20 | --- | Single,<br>unwrapped<br>instrument in<br>center of lowest<br>tray |
| 2. Wrapped 273<br>(complex/<br>lumened) | 273 (273-279) | 305 (305 - 330) | 8 | 25 | 20 | 4 wrapped trays<br>arranged so that<br>no instruments<br>touching.<br>Approximately<br>80% of area<br>occupied. |
| 3. Wrapped 250<br>(for instruments<br>onliquida) | 250 (250-256) | 205 (205 - 225) | 30 | 25 | 20 | Instruments<br>4 wrapped trays<br>arranged so that<br>no instruments<br>touching.<br>Approximately<br>80% of area<br>occupied. |
| 4. Wrapped 273<br>(non-lumened) | 273 (273-279) | 305 (305 - 330) | 4 | 25 | 20 | 4 wrapped trays<br>arranged so that<br>no instruments<br>touching.<br>Approximately<br>80% of area<br>occupied. |
| 5. Bowie-Dick | 273 (273-279) | 305 (305 - 330) | 3-1/2 | 20 | 2 | B-D pack in<br>otherwise empty<br>chamber |
| 6. Liquids | 250 (250-256) | 205 (205-225) | 30 | -- | -- | 6 - 250 ml.<br>Containers<br>made of heat<br>proof glass,<br>each filled up to<br>2/3 capacity. |
Dental and medical instruments were placed within self-sealing, disposable pouches. The pouches were placed upright in an instrument rack.
{2}------------------------------------------------
### Technological Characteristics:
The Tuttnauer EHS Series Electronic Table-top Autoclave is a steam sterilizer that includes as its main components: a pressure vessel with steam jacket, heating elements, a dualchamber water reservoir, a water pump and a vacuum pump. The device is identical to the predicate device, with the exception of the proposed modification to the labeling that would authorize sterilization of wrapped, non-lumened devices at 273° for four (4) minutes. The following table contains a comparison of the characteristics of the device and its predicate.
| Characteristic | 2540 EHS (w/new<br>cycle) | 2540 EHS K003470 |
|------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Labeling/Intended<br>Use | Auto Steam<br>Autoclave | Auto Steam<br>Autoclave |
| Process Parameters | Sterilization cycles<br>defined by time, temp.<br>and pressure.<br>Wrapped, non-<br>lumened medical<br>instruments sterilized<br>at 273-279°F for four<br>(4) minutes. Complex<br>lumened devices<br>sterilized at 273-<br>279°F for eight (8)<br>minutes. | Sterilization cycles<br>defined by time, temp.<br>and pressure. All<br>wrapped medical<br>instruments, including<br>complex lumened<br>devices, sterilized at<br>273-279°F for eight<br>(8) minutes. |
| Process Monitors | Temp. and pressure<br>gauges, digital display<br>screen, and printer | Temp. and pressure<br>gauges, digital display<br>screen, and printer |
| Pre-Vacuum | Yes | Yes |
| On-Board Steam<br>Generation | Yes | Yes |
| Control | Cycle time, temp.,<br>pressure, and user<br>interface controlled by<br>microprocessor | Cycle time, temp.,<br>pressure, and user<br>interface controlled by<br>microprocessor |
| Program Comparison | Wrapped, unwrapped,<br>and dry | Wrapped, unwrapped,<br>liquids, and dry |
| Process Equivalent<br>Times | Sterilization times of<br>3-1/2, 4, 8, 30 minutes<br>depending upon<br>program selected | Sterilization times of<br>3-1/2, 8, 30 minutes<br>depending upon<br>program selected |
{3}------------------------------------------------
#### Non-Clinical Testing:
Tuttnauer conducted validation studies in accordance with ANSI/AAMI ST55. Successful sterilization was accomplished in all tests performed .
### Conclusion:
The Tuttnauer 2540 EHS Series Table-Top Autoclave is substantially equivalent to its predicate device, and can safely and effectively sterilize wrapped, non-lumened medical instruments at 273-279°F for four (4) minutes.
{4}------------------------------------------------
## Indications for Use Statement
510(k) Number: KO21504
Device Name: Tuttnauer EHS Series Table-Top Autoclave
Indications For Use: The 2540 EHS Table-Top Autoclave is intended to provide sterilization of medical and dental instruments (wrapped and unwrapped), including complex lumened devices such as dental handpieces, porous, hollow loads, and to sterilize liquids for nonclinical applications. Cycle parameters are as follows:
| Cycle | Ste. Temp & Range (°F) | Press. & Range (Kpa) | Time (min) | Vacuum (kPa.) | Dry Time (min) | Load Configuration |
|-----------------------------------|------------------------|----------------------|------------|---------------|----------------|--------------------------------------------------------------------------------------------------|
| 1. Unwrapped 273 | 273 (273-279) | 305 (305 - 330) | 3-1/2 | 20 | -- | Single, unwrapped instrument in center of lowest tray |
| 2. Wrapped 273 (complex/ lumened) | 273 (273-279) | 305 (305 - 330) | 8 | 25 | 20 | 4 wrapped trays arranged so that no instruments touching.<br>Approximately 80% of area occupied. |
| 3. Wrapped 250 | 250 (250-256) | 205 (205 - 225) | 30 | 25 | 20 | 4 wrapped trays arranged so that no instruments touching.<br>Approximately 80% of area occupied. |
| 4. Wrapped 273 (non-lumened) | 273 (273-279) | 305 (305 - 330) | 4 | 25 | 20 | 4 wrapped trays arranged so that no instruments touching.<br>Approximately 80% of area occupied. |
| 5. Bowie-Dick | 273 (273-279) | 305 (305 - 330) | 3-1/2 | 20 | 2 | B-D pack in otherwise empty chamber |
| 6. Liquids | 250 (250-256) | 205 (205-225) | 30 | -- | -- | 6 - 250 ml.<br>Containers made of heat proof glass, each filled up to 2/3 capacity |
Dental and medical instruments were placed within self-sealing, disposable pouches. The pouches were placed upright in an instrument rack.
{5}------------------------------------------------
(PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED)
…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… Concurrence of CDRH, Office of Device Evaluation (ODE)
Prescription Use _____________________________________________________________________________________________________________________________________________________________
Over -The-Counter Use ________________________________________________________________________________________________________________________________________________________ OR
(Per 21 C.F.R. § 801.109)
(Optional Format 1-2-96)
{6}------------------------------------------------
Image /page/6/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo is a circular emblem with the department's name encircling an inner graphic. The graphic features three stylized human profiles facing right, with three parallel lines above them, resembling a stylized bird in flight.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
## JUL 2 5 2002
Tuttnauer USA Company Limited C/O Mr. Todd H. Halpern Buchanan Ingersoll, P. C. 1776 K Street N.W., Suite 800 Washington, D.C. 20006-2365
Re: K021504
Trade/Device Name: Tuttnauer 2540 EHS Series Table-Top Autoclave Regulation Number: 880.6880 Regulation Name: Steam Sterilizer Regulatory Class: II Product Code: FLE Dated: May 9, 2002 Received: May 9, 2002
Dear Mr. Halpern:
We have reviewed your 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, listing 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 the Code of Federal Regulations, Title 21, Parts 800 to 898. 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.
{7}------------------------------------------------
Page 2 - Mr. Halpern
You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801); good manufacturing practice requirements as set forth in the quality systems (OS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
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 advice for your device on our labeling regulation (21 CFR Part 801 and additionally 21 CFR Part 809.10 for in vitro diagnostic devices), please contact the Office of Compliance at (301) 594-4618 . Additionally, for questions on the promotion and advertising of your device, please contact the Office of Compliance at (301) 594-4639. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). Other general information on your responsibilities under the Act may be obtained 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 yours,
Timothy Ulatowski
Timothy Ulatowski Director Division of Anesthesiology, General Hospital, Infection Control and Dental Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
{8}------------------------------------------------
### Indications for Use Statement
510(k) Number:
K02/504f
2540
Device Name:
Tuttnauer EHS Series Table-Top Autoclave
Indications For Use: The 2540 EHS Table-Top Autoclave is intended to provide sterilization of medical and dental instruments (wrapped and unwrapped), including complex lumened devices such as dental handpieces, porous, hollow loads, and to sterilize liquids for nonclinical applications. Cycle parameters are as follows:
| Cycle | Ste. Temp & Range | Press. & | Time | Vacuum | Dry Time | Load |
|-----------------------------------------|-------------------|-----------------|-------|--------|----------|--------------------------------------------------------------------------------------------------------------------------------|
| | (°F) | Range (Kpa) | (min) | (kPa.) | (min) | Configuration |
| 1. Unwrapped<br>273 | 273 (273-279) | 305 (305 - 330) | 3-1/2 | 20 | -- | Single,<br>unwrapped<br>instrument in<br>center of lowest<br>tray |
| 2. Wrapped 273<br>(complex/<br>lumened) | 273 (273-279) | 305 (305 - 330) | 8 | 25 | 20 | 4 wrapped trays<br>arranged so that<br>no instruments<br>touching.<br>Approximately<br>80% of area<br>occupied. |
| 3. Wrapped 250 | 250 (250-256) | 205 (205 - 225) | 30 | 25 | 20 | Instruments<br>4 wrapped trays<br>arranged so that<br>no instruments<br>touching.<br>Approximately<br>80% of area<br>occupied. |
| 4. Wrapped 273<br>(non-lumened) | 273 (273-279) | 305 (305 - 330) | 4 | 25 | 20 | 4 wrapped trays<br>arranged so that<br>no instruments<br>touching.<br>Approximately<br>80% of area<br>occupied. |
| 5. Bowie-Dick | 273 (273-279) | 305 (305 - 330) | 3-1/2 | 20 | 2 | B-D pack in<br>otherwise empty<br>chamber |
| 6. Liquids | 250 (250-256) | 205 (205-225) | 30 | -- | -- | 6 - 250 ml.<br>Containers<br>made of heat<br>proof glass,<br>each filled up to<br>2/3 capacity. |
Dental and medical instruments were placed within self-sealing, disposable pouches. The pouches were placed upright in an instrument rack.
{9}------------------------------------------------
# (PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED)
…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… Concurrence of CDRH, Office of Device Evaluation (ODE)
Prescription Use _____________________________________________________________________________________________________________________________________________________________
OR Over -The-Counter Use ________________________________________________________________________________________________________________________________________________________
(Per 21 C.F.R. § 801.109)
(Optional Format 1-2-96)
\$\underset{\text{Division Clerk's Office}}{Passed to Clin}\$
(Division Sign-Off) Division of Dental, Infection Control, and General Hospital Devices 510(k) Number KO3 1504
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.