The MEDICON Spinal Spreading Systems are used to spread soft tissue and maintain surgical access in spine surgery and may only be used by surgeons with proper training and adequate experience in spine surgery.
Device Story
MEDICON Spinal Spreading Systems are reusable manual surgical instruments designed to spread soft tissue and maintain access during spine surgery. The system comprises various spreader models, including expandable frame-type retractors, ring-handle retractors, vertebral spreaders, and tubular retractors. These devices are used in clinical settings (OR) by trained spine surgeons. The instruments function mechanically to hold wound edges open or provide access for minimally invasive procedures. Components include blades, hooks, handles, and depth gauges. The system supports diverse approaches, including cervical, inter-laminar, trans-laminar, extra-foraminal, and dorsolateral. The device provides stable, self-retaining surgical access, which facilitates surgical visualization and procedural efficiency, potentially reducing operative time and improving patient outcomes by maintaining clear access to the surgical site.
Clinical Evidence
No clinical studies were performed. Substantial equivalence is supported by bench testing, including biocompatibility, cleaning validation (AAMI TIR30:2011), steam sterilization validation (ISO 17665-1:2006), and mechanical strength testing of blades and blade supports.
Indicated for use in spine surgery to spread soft tissue and maintain surgical access. For use by surgeons with proper training and experience in spine surgery.
Regulatory Classification
Identification
A self-retaining retractor for neurosurgery is a self-locking device used to hold the edges of a wound open during neurosurgery.
Predicate Devices
Fetzer Medical Self-Retaining Retractors (K161004)
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Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
March 24, 2017
MEDICON eG % J.D. Webb Official Correspondent The OrthoMedix Group, Inc. 1001 Oakwood Blvd Round Rock, Texas 78681
Re: K161680
Trade/Device Name: MEDICON Spinal Spreading Systems Regulation Number: 21 CFR 882.4800 Regulation Name: Self-Retaining Retractor for Neurosurgery Regulatory Class: Class II Product Code: GZT Dated: February 21, 2017 Received: February 24, 2017
Dear Mr. Webb:
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. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you, however, that device labeling must be truthful and not misleading.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to 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. 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); medical device reporting (reporting of medical devicerelated adverse events) (21 CFR 803); good manufacturing practice requirements as set forth in
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Page 2 - J.D. Webb
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.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Division of Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to
http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm for the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance.
You may obtain other general information on your responsibilities under the Act from the Division of Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm.
Sincerely.
# Michael J. Hoffmann -S
for Carlos L. Peña, PhD, MS Director Division of Neurological and Physical Medicine Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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#### Indications for Use
510(k) Number (if known) K161680
Device Name MEDICON Spinal Spreading Systems
Indications for Use (Describe)
The MEDICON Spinal Spreading Systems are used to spread soft tissue and maintain surgical access in spine surgery and may only be used by surgeons with proper training and adequate experience in spine surgery.
| Type of Use (Select one or both, as applicable) | |
|-------------------------------------------------|--|
|-------------------------------------------------|--|
X | Prescription Use (Part 21 CFR 801 Subpart D)
| | Over-The-Counter Use (21 CFR 801 Subpart C)
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#### 1. Submitter Information
| Submitter: | Joachim Schmid<br>MEDICON eG<br>Gänsäcker 15<br>78532 Tuttlingen<br>GERMANY<br>(49) 7462 2009-0 Tele<br>email: sales@medicon.de |
|------------------------------------|----------------------------------------------------------------------------------------------------------------------------------|
| Contact Person: | J.D. Webb<br>1001 Oakwood Blvd<br>Round Rock, TX 78681<br>512-388-0199 Tele<br>512-692-3699 Fax<br>e-mail: jdwebb@orthomedix.net |
| Date Prepared: | February 17, 2017 |
| Device Trade Name: | Medicon Spinal Spreading Systems |
| Common / Usual Name: | Self-Retaining Retractors |
| Classification Name: | Self-Retaining retractor for neurosurgery |
| Code of Federal Regulations (CFR): | 21 CFR 882.4800 |
| Regulatory Class: | II |
| Product Code: | GZT |
## 2. Predicate Device:
| Trade name: | Fetzer Medical Self-Retaining<br>Retractors | Versatrac™ Lumbar Retractor<br>System | Cervical Self-Retaining Retractor |
|-------------------|---------------------------------------------|---------------------------------------|-----------------------------------|
| 510(k) No.: | K161004 | K964402 | K935529 |
| 510(k) submitter: | Fetzer Medical GmbH & Co. KG | I V. Mueller | Koros Surgical Instruments, Corp |
### 3. Device Description:
| Device Description: | The MEDICON Spinal Spreading System is made up of multiple reusable manual spreader systems. The spreaders include components for all approaches in spine surgery, including those specifically for cervical spine surgery, as well as inter-laminar, trans-laminar, extra-foraminal and dorsolateral approaches. The multiple components support classic and minimally invasive procedures. The components are made from a radiolucent x-ray compatible material, from titanium, some from stainless steel, and some from anodized aluminum.<br>The spreader models (accessories) include: | |
|---------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------|
| | Spreader | Accessories |
| | Spread-iT Retractor Set I & Set II | titanium hooks, blades & depth gauge |
| | retraCT system set | PEEK blades, wrench & screwdriver |
| | Cervicalino System | Bay blades, handle |
| | Piccolino counter retractor | spreading sleeves, trocar sleeves, dilator set & handles |
| | Caspar laminectomy spreader | blades & hooks |
| | Hauser French retractor | blades & speculums |
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| Spinal retractor | blades |
|-------------------------------------|-----------------|
| Scoville laminectomy retractor | blades |
| Haverfield Scoville lamin retractor | blades & handle |
| Haverfield Scoville | |
| Inge lamina spreader | hooks & blades |
| Williams retractor | |
| Cervical tissue retractor | |
| Cloward lamina spreader | |
| Cloward cervical spreader | |
| Markham Meyerding retractor | |
#### 4. Indications for Use
The MEDICON Spinal Spreading Systems are used to spread soft tissue and maintain surgical access in spine surgery and may only be used by surgeons with proper training and adequate experience in spine surgery.
#### 5. Comparison of technological Characteristics to predicate device
| | New Device | Predicate 1 - Fetzer<br>Medical (K161004) | Predicate 2 - V. Mueller<br>(K964402) | Predicate 3 - T. Koros<br>(K935529) |
|-----------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------|-----------------------------------------|--------------------------------------|
| Trade name: | Medicon Spinal Spreading<br>Systems | Fetzer Medical Self-Retaining<br>Retractors | Versatrac™ Lumbar Retrac-<br>tor System | Cervical Self-Retaining<br>Retractor |
| Indications for<br>use: | The MEDICON Spinal<br>Spreading Systems are<br>used to spread soft tissue<br>and maintain surgical<br>access in spine surgery<br>and may only be used by<br>surgeons with proper<br>training and adequate<br>experience in spine<br>surgery. | Fetzer Medical Self-<br>Retaining Retractors are<br>intended to hold the edges<br>of a wound open during<br>spinal surgery. | Same | Same |
| Design | | | | |
| Expandable<br>Frame type<br>retractors: | The expandable frame type<br>retractors consist of an<br>expandable toothed rack,<br>two rigid or hinges blade<br>support arm, blade<br>supports and different<br>blade styles and types<br>blades can be attached.<br>Blades are exchangeable<br>and can be snap-loaded<br>from the side or from the<br>top or slide on the arm | Same | Same | Same |
| Expandable<br>Ring handle<br>type retractors: | The expandable ringhandle<br>type retractors consist of two<br>ring handles, a catch, a joint.<br>two shanks and fixed or<br>exchangeable blades/hooks.<br>The exchangeable blades can<br>be snap-loaded from the side<br>or from the top. | Same | Same | Same |
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## 510(k) Summary
| Vertebral<br>Spreaders: | Vertebral spreaders consist of<br>two conjoined shanks and<br>have a catch. The working<br>end has a flat design with<br>teeth or serrations at the<br>outer side. These spreaders<br>have ring-handles or shank<br>handles. | Same | Same | N/A |
|-------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------|------|------|
| Tubular<br>Retractor: | Tube retractors are used for<br>minimal invasive access and<br>are available in various<br>lengths and diameters. The<br>tube can be fixed to a holding<br>arm or held with manual<br>handles. | Same | Same | N/A |
| Materials: | Stainless steel (ASTM F899) | Same | Same | Same |
| | Titanium alloy, Ti-6Al-4V<br>(ASTM F136) | Same | Same | Same |
| | CP titanium (ASTM F67) | Same | Same | Same |
| | Aluminum 6082 (EN 473-3) | Same | Same | Same |
| | PEEK CA/CF 30 | N/A | N/A | N/A |
| | Polyphenylsulfone (ASTM<br>D6394) (only for<br>accessories) | N/A | N/A | N/A |
| | Polypropylene (ASTM D4101)<br>(only for accessories) | N/A | N/A | N/A |
| | Silicone (only for<br>accessories) | N/A | N/A | N/A |
#### 6. Testing
The following performance data were provided in support of the substantial equivalence determination:
| | Test Method Summary | Results |
|-----------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------|
| Non-clinical<br>Test<br>Summary: | Biocompatibility testing | Acceptable results |
| | Cleaning validation of worst case components (AAMI TIR30:2011) | No visible soil was seen on the test articles. |
| | Steam Sterilization Validation of worst case components (ISO 17665-1: 2006) | Each component met the acceptance criteria. |
| | Test to determine the strength of blade supports | Blade supports met acceptance criteria |
| | Test to determine the strength of blades | Blades met acceptance criteria |
| | Engineering analysis to determine strength testing worst case | Worst case was determined |
| Clinical Test<br>Summary: | No clinical studies were performed | |
| Conclusions:<br>Non-clinical<br>and Clinical: | Medicon considers the Spinal Spreading Systems to be equivalent to the<br>predicate devices listed above. This conclusion is based upon the devices'<br>similarities in principles of operation, technology, materials and indications for<br>use | |
#### 7. Substantial Equivalence
Substantial equivalence for the Medicon self-retaining retractors is based on similarities in intended use, design (function, dimensions and operational principles), materials, labeling and clearance letter.
#### 8. Conclusion
The minor differences between the Medicon Spinal Spreading Systems and the predicate devices of safety and effectiveness. Non-clinical testing demonstrates that the Medicon Systems do comply to relevant standards and they are equivalent to the predicate devices. Based on the comparison of technological characteristics and nonclinical testing the subject device is substantially equivalent to the predicate.
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.