The Pajunk Plexalong Sets are intended for delivery of continuous conduction anesthesia of peripheral nerves and plexus for up to 72 hours. Continuous delivery for up to 72 hours is accomplished using the Polyamide indwelling catheter. An electrical stimulus may be applied to the conduction needle via a cable and connectors to assist the physician pinpoint the area of application.
Device Story
Plexalong sets are single-use, sterile, non-pyrogenic, latex-free kits for continuous peripheral nerve and plexus anesthesia. Components include a conduction needle (facet, Sprotte, or Tuohy tip), stylet, polyamide indwelling catheter, and catheter adapter. Stylet prevents tissue clogging during insertion; stylet material is polycarbonate. Physician uses nerve stimulus connector to apply electrical current to needle tip for anatomical localization. Device used in clinical settings by physicians. Output is localized anesthesia delivery via indwelling catheter for up to 72 hours. Benefits include sustained pain management through continuous infusion.
Clinical Evidence
Bench testing only. No clinical data provided. Testing verified conformance to recognized consensus standards including DIN 13090/ISO 594 (Luer fittings), DIN 13097 (cannula), DIN 17442/ISO 9626 (steel), and various sterilization/packaging standards (DIN EN 550, 556, 868).
Technological Characteristics
Single-use conduction anesthesia kit. Materials: Polyamide (catheter), Polycarbonate (stylet), Stainless steel (cannula per DIN 17440/ISO 9626). Components: needle, stylet, catheter, adapter. Connectivity: electrical nerve stimulus connector. Sterilization: ETO (per DIN EN 550). Packaging: Polypropylene containers. Standards: ISO 594 (Luer), ISO 9626 (cannula), EN ISO 14971 (risk management).
Indications for Use
Indicated for delivery of continuous conduction anesthesia of peripheral nerves and plexus for up to 72 hours. Not intended for RF ablation or any other type of ablation procedure.
Regulatory Classification
Identification
An anesthesia conduction needle is a device used to inject local anesthetics into a patient to provide regional anesthesia.
{0}------------------------------------------------
DEC 2 1 2004
K0429i79
# 510(k) Summary of Safety and Effectiveness
#### Submitter Information:
PAJUNK GmbH Karl Hall Straße 1 D78187 Geisingen Germany
#### USA Contact:
Mr. Burk A. Brandt CE Consultancy, Inc. 5010 NW Crescent Valley Dr. Corvallis, OR 97330 - USA
Phone: (541) 752-3953 Fax: (541) 752-3972
### Device Name:
Trade Name: Plexalong Sets Common Name: Anesthesia Conduction Kit Classification Name: Anesthesia Conduction Kit (Reference, 21CFR, 868.5140, April 1, 2003), Anesthesia Conduction Needle (Reference, 21CFR, 868.5140, April 1, 2003)
#### Predicate Devices:
Plexalong sets consist of a Paiunk Unipolar needle (conduction cannula with nerve stimulus connector and tubing), stylet, and an open end catheter and a catheter adapter. The Plexalong sets have been cleared under K013041 and the Unipolar needles under 510(k) number K000722 (facet and Sprotte tip conduction cannula and tubing). Unipolar needles with a Tuohy tip were cleared for market under 510(k) number K023218.
The packaging materials used to package the Pajunk Plexalong sets, and needles have not changed. The contract sterilizer, other than a company name change (was Griffith Micro Science, now Sterigenics) and sterilizing process is the same.
510(k) Summary
046
{1}------------------------------------------------
### Device Description:
The Pajunk Plexalong sets are single use, sterile, non-pvrogenic and latex free conduction anesthesia sets intended for delivery of continuous conduction anesthesia of peripheral nerves and plexus for up to 72 hours. The Plexalong sets consist of a single use sterile, non-pyrogenic conduction needle with tubing, stilett, a catheter and catheter adapter. The stylet is used to stop tissue from clogaing the needle (during insertion) by blocking the opening at the tip of the needle. Pajunk changed the stilett material from a surgical stainless steel to polycarbonate. The Unipolar needles used in the Plexalong sets are available in three tip configurations. A Unipolar needle with a facet tip, Sprotte tip or Unipolar needle with a Tuohy tip. Only Plexalong sets with the Tuohy needles are affected by the stilett material change. To assist the physician pinpoint the area of application, an electrical stimulus can be applied to the tip of the conduction needle via a nerve stimulus connector.
### Intended Use:
The Pajunk Plexalong Sets are intended for delivery of continuous conduction anesthesia of peripheral nerves and plexus for up to 72 hours. Continuous delivery for up to 72 hours is accomplished using the Polyamide indwelling catheter. An electrical stimulus may be applied to the conduction needle via a cable and connectors to assist the physician pinpoint the area of application.
## Technology Characteristics:
The Pajunk conduction needles, including the physical dimensions. connector, tubing, metal and plastics, have been cleared under 510(k) numbers K000722, K013041. K023218. and K033018. The material used to manufacture the Pajunk catheter and catheter adapter are identical to the materials used to manufacture the catheter and catheter adapter of the predicate devices described earlier in this 510(k) Summary of Safety and Effectiveness. The Plexalong Sets are supplied in polypropylene containers that are sealed to assure sterility.
{2}------------------------------------------------
# Summary of Performance Testing
The Pajunk Plexalong Sets were designed to conform to the applicable sections of the following recognized consensus standards. The testing included verifying conformance to these standards.
:
| Standard | Issue Date | Title |
|--------------------------------|------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| DIN 13090/ISO 594 | 08.1984 | Luer fittings w/wo locking feature |
| DIN 13097 Part 1 | 01.1980 | Medical injection cannula |
| DIN 13097 Part 3 | 11.1979 | Medical cannula |
| DIN 17442/ISO 9626 | 10.1977 | Steel for medical instruments |
| DIN EN 550 | 07.1993 | Sterilization of med. Prod.; Validation & routine controls<br>for sterilization with ETO |
| DIN EN 556 | 01.1995 | Sterilization of medical products, requirements for<br>medical products that are labeled "sterile" |
| DIN EN 724 | 12.1994 | Guidance on the application of EN29001 and EN46001<br>for non-active medical products |
| PrEN 868-1 | 10.1996 | Packaging materials for the sterilization of packaged<br>goods. Part 1: general requirements for the validation<br>of the packaging of sterilized end-packaged products |
| DIN EN 868-2 | 03.1993 | Packaging materials for the sterilization of packaged<br>goods. Part 2: sterilization packaging, requirements<br>and tests. |
| DIN EN 980 | 08.1996 | Graphic symbols for marking medical products |
| DIN EN 1441 | 08.1994 | Risk analysis for medical products |
| EN ISO 14971 | 2000 | Risk Management |
| DIN EN 1707 | 01.1997 | 6% Luer cone connections for injection cannula and<br>particular medical equipment |
| DIN EN/ISO 9626 and<br>A1:2001 | 06.1995 | Cannula tube of non-rusting steel (SS) for the<br>manufacture of medical products |
| BS 6196 | 1889 | Sterile epidural catheters and introducer needles for<br>single use |
| DIN EN 30993-1 | 12.1994 | Biological evaluation of medical products - instructions<br>for selection of tests |
| DIN EN 46001 | 12.1993 | Particular requirements for medical products |
| DIN 17440 | 09.1996 | Stainless Steels |
| BS 4843 | | Single entry IV cannula |
# Conclusion:
The PAJUNK Plexalong Sets are as safe and effective as the predicate devices when used according to the instructions in the directions for use supplied with the devices.
:
{3}------------------------------------------------
Image /page/3/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" around the perimeter. Inside the circle is an abstract symbol resembling an eagle or bird in flight, composed of three stylized, curved lines.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
DEC 21 2004
PAJUNK GmbH C/O Mr. Burk A. Brandt CE Consultancy, Incorporated 5010 NW Crescent Valley Drive Corvallis, Oregon 97330
Re: K042979
Trade/Device Name: Pajunk Plexalong Sets Regulation Number: 21 CFR 868.5150 Regulation Name: Anesthesia Conduction Needle Regulatory Class: II Product Code: BSP Dated: December 4, 2004 Received: December 7, 2004
Dear Mr. Brandt:
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.
{4}------------------------------------------------
#### Page 2 - Mr. Brandt
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 Part 801); good manufacturing practice requirements as set forth in the quality systems (QS) 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), please contact the Office of Compliance at (240) 276-0120. 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 yours.
Quts
Chiu Lin. Ph.D. Director Division of Anesthesiology, General Hospital, Infection Control and Dental Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
{5}------------------------------------------------
### INDICATIONS FOR USE
510(k) Number: Køy2977 7 -----------------------------------------------------------------------------------------------------------------------------------------------------
Device Name: Pajunk Plexalong Sets
#### Indications for use:
The Pajunk Plexalong Sets are intended for delivery of continuous conduction anesthesia of peripheral nerves and plexus for up to 72 hours. Continuous delivery for up to 72 hours is accomplished using the Polvamide indwelling catheter. An electrical stimulus may be applied to the conduction needle via a cable and connectors to assist the physician pinpoint the area of application.
#### Warning:
The Pajunk GmbH needles and puncture sets are not intended for RF ablation or any other type of ablation procedure
(Please do not write below this line - continue on another page if needed)
Concurrence of CDRH, Office of Device Evaluation
| Prescription Use | xx |
|----------------------|----|
| (Per 21 CFR 801.109) | |
| OR Over-The-Counter | |
|---------------------|--|
|---------------------|--|
(Division Sign-Off)
Division of Anesthesiology, General Hospital,
Infection Control, Dental Devices
510(k) Number ________________________________________________________________________________________________________________________________________________________________
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.