K133506 · Noras Mri Products GmbH · MOS · Aug 6, 2014 · Radiology
Device Facts
Record ID
K133506
Device Name
NORAS OR HEAD HOLDER FLEXIBILITY
Applicant
Noras Mri Products GmbH
Product Code
MOS · Radiology
Decision Date
Aug 6, 2014
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 892.1000
Device Class
Class 2
Indications for Use
For Siemens: The NORAS OR Head Holder Flexibility and the NORAS OR Head Coils 1.57 / 3.0T are used for intra-operative MR imaging during open-skull neurosurgery. The NORAS OR Head Holder is used for safely securing the patient's head during the intervention. The NORAS OR Head Holder Flexibility together with the NORAS OR Head Coil 1.5T / 3.0T are suitable for use with the MR system MAGNETOM Aera / Skyra and the Combi-Dockable-Table together with Trumpf OR Tables TrueSystem 7500 (EU/US Version) and as well as together with Maquet OR Tables Magnus (EU/US Version) and Alpha Maquet Plus (EU/US Version). For Philips: The NORAS OR Head Holder Flexibility and the NORAS OR Head Coils 1.5T / 3.0T are used for intra-operative MR imaging during open-skull neurosurgery. The NORAS OR Head Holder is used for safely securing the patient's head during the intervention. The NORAS OR Head Holder Flexibility together with the NORAS OR Head Coil 1.5T / 3.0T are suitable for Philips MR system Ingenia 1.5T/3T in combination with Maguet Transfer Board together with Maquet OR table.
Device Story
Device functions as combined head holder for neurosurgical stabilization and MR receiving coil for intra-operative imaging. Head frame allows adjustment for varying head sizes; swiveling and rotating capabilities provide access to intervention area. Used in OR environment during open-skull neurosurgery; operated by surgical staff. Integrates with specific MR systems (Siemens MAGNETOM Aera/Skyra, Philips Ingenia) and compatible OR tables (Trumpf, Maquet). Provides stable patient positioning while enabling high-quality MR imaging during procedures. Benefits include improved surgical access and real-time intra-operative imaging guidance.
Clinical Evidence
Bench testing only. Device performance and safety parameters evaluated against FDA-recognized NEMA standards and IEC 60601-2-33:2002. Mechanical components, including the Z-joint, tested for compliance with IEC 60601-1 3rd edition (clause 9.8).
Technological Characteristics
Mechanical head holder with integrated MR receiving coil. Features adjustable head frame with swiveling/rotating Z-joint. Materials and design conform to IEC 60601-1 (3rd ed) and IEC 60601-2-33:2002. Compatible with 1.5T and 3.0T MR systems. Non-electronic mechanical adjustment mechanism.
Indications for Use
Indicated for patients undergoing open-skull neurosurgery requiring intra-operative MR imaging and head stabilization.
Regulatory Classification
Identification
A magnetic resonance diagnostic device is intended for general diagnostic use to present images which reflect the spatial distribution and/or magnetic resonance spectra which reflect frequency and distribution of nuclei exhibiting nuclear magnetic resonance. Other physical parameters derived from the images and/or spectra may also be produced. The device includes hydrogen-1 (proton) imaging, sodium-23 imaging, hydrogen-1 spectroscopy, phosphorus-31 spectroscopy, and chemical shift imaging (preserving simultaneous frequency and spatial information).
Special Controls
*Classification.* Class II (special controls). A magnetic resonance imaging disposable kit intended for use with a magnetic resonance diagnostic device only is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 892.9.
{0}------------------------------------------------
Image /page/0/Picture/1 description: The image shows the seal of the Department of Health & Human Services - USA. The seal is circular, with the words "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the perimeter. In the center of the seal is an abstract symbol that appears to represent three human profiles in a row.
Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
August 6, 2014
NORAS MRI Products GmbH % Mr. Zahed Sedighiani Quality and Regulatory Management Leibnizstrasse 4 Hoechberg D-97204 GERMANY
Re: K133506
Trade/Device Name: NORAS OR Head Holder "Flexibility" Regulation Number: 21 CFR 892.1000 Regulation Name: Magnetic resonance diagnostic device Regulatory Class: II Product Code: MOS, HBL Dated: June 25, 2014 Received: June 27, 2014
Dear Mr. Sedighiani:
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 device-related adverse events) (21 CFR 803); 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.
{1}------------------------------------------------
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/Resourcesfor You/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 yours.
Michael D. O'Hara
for
Janine M. Morris Director Division of Radiological Health Office of In Vitro Diagnostics and Radiological Health Center for Devices and Radiological Health
Enclosure
{2}------------------------------------------------
DEPARTMENT OF HEALTH AND HUMAN SERVICES Food and Drug Administration
## Indications for Use
Form Approved: OMB No. 0910-0120 Expiration Date: January 31, 2017 See PRA Statement on last page.
## 510(k) Number (if known) K133506
### Device Name
NORAS OR Head Holder Flexibility 114464
## Indications for Use (Describe)
For Siemens:
The NORAS OR Head Holder Flexibility and the NORAS OR Head Coils 1.57 / 3.0T are used for intra-operative MR imaging during open-skull neurosurgery.
The NORAS OR Head Holder is used for safely securing the patient's head during the intervention.
The NORAS OR Head Holder Flexibility together with the NORAS OR Head Coil 1.5T / 3.0T are suitable for use with the MR system MAGNETOM Aera / Skyra and the Combi-Dockable-Table together with Trumpf OR Tables TrueSystem 7500 (EU/US Version) and as well as together with Maquet OR Tables Magnus (EU/US Version) and Alpha Maquet Plus (EU/US Version).
For Philips:
The NORAS OR Head Holder Flexibility and the NORAS OR Head Coils 1.5T / 3.0T are used for intra-operative MR imaging during open-skull neurosurgery.
The NORAS OR Head Holder is used for safely securing the patient's head during the intervention.
The NORAS OR Head Holder Flexibility together with the NORAS OR Head Coil 1.5T / 3.0T are suitable for Philips MR system Ingenia 1.5T/3T in combination with Maguet Transfer Board together with Maquet OR table.
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)
## PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON A SEPARATE PAGE IF NEEDED.
FOR FDA USE ONLY
Concurrence of Center for Devices and Radiological Health (CDRH) (Signature)
Michael D'Hara
FORM FDA 3881 (1/14)
SC Publishing Services (301) 443-6740
{3}------------------------------------------------
This section applies only to requirements of the Paperwork Reduction Act of 1995.
## *DO NOT SEND YOUR COMPLETED FORM TO THE PRA STAFF EMAIL ADDRESS BELOW.*
The burden time for this collection of information is estimated to average 79 hours per response, including the time to review instructions, search existing data sources, gather and maintain the data needed and complete and review the collection of information. Send comments regarding this burden estimate or any other aspect of this information collection, including suggestions for reducing this burden, to:
> Department of Health and Human Services Food and Drug Administration Office of Chief Information Officer Paperwork Reduction Act (PRA) Staff PRAStaff@fda.hhs.gov
"An agency may not conduct or sponsor, and a person is not required to respond to, a collection of information unless it displays a currently valid OMB number."
{4}------------------------------------------------
003_Summary.docx
Image /page/4/Picture/1 description: The image shows the logo for NORAS MRI products. The word "NORAS" is in bold, blue letters, with a horizontal line underneath. To the right of the word "NORAS" is a graphic of a heartbeat line, and the words "MRI products" are stacked on top of each other to the right of the heartbeat line.
# 510(k) Summary
NORAS OR Head Holder Flexibility
Date of Summary Preparation: March 28, 2014
This summary of 510(k) safety and effectiveness information is being submitted in accordance with the requirements of 21 CFR § 807.92.
- 1. General Information
Importer/Distributor Name and Address NORAS MRI products GmbH Leibnizstr.4 97204 Hoechberg / Germany
ERN: 3004929307 Owner/Operator Number: 9071737
Manufacturing Site Name and Address NORAS MRI products GmbH Leibnizstr.4 97204 Hoechberg / Germany
ERN: 3004929307 Owner/Operator Number: 9071737
003 Summary.docx
{5}------------------------------------------------
Image /page/5/Picture/1 description: The image shows the logo for NORAS. The logo is in blue and white. The word "NORAS" is in large, bold letters, and to the right of it is a heartbeat line with the words "MRI products" below it.
#### 2. Contact Person
Zahed Sedighiani MSc. Medical Engineering Quality Assurance & International Licensing NORAS MRI products GmbH Leibnizstr.4 97204 Hoechberg Germany Tel: (+49) 931 / 29927-17 Fax: (+49) 931 / 29927-20 zahed.sedighiani@noras.de
#### Device Name and Classification 3.
| Trade Name: | NORAS OR Head Holder Flexibility |
|-----------------------|--------------------------------------|
| Common Name: | NORAS OR Head Holder Flexibility |
| Classification Name: | Magnetic Resonance Diagnostic Device |
| Classification Panel: | Radiology |
| CFR Number: | 21 CFR § 892.1000 |
| Device Class: | II |
| Product Code: | MOS, HBL |
{6}------------------------------------------------
#### Device Description 4.
The NORAS OR Head Holder and the NORAS OR Head Coil 1.5T / 3.0T combine the functions of a head holder for neurosurgical interventions and an MR receiving coil for intra-operative surgery.
The NORAS OR Head Holder without the NORAS OR Head Coil 1.5T / 3.0T can be used for stabilizing the patient's head. It can also be used in combination with the body coil.
The Head Frame of the NORAS OR Head Holder allows adjustment to heads varying in size. For optimal access to the area of intervention, the Head Frame can be swiveled and rotated.
Image /page/6/Picture/6 description: The image shows a complex mechanical device, possibly a prototype or a component of a larger machine. It features a combination of curved pipes, flat plates, and cylindrical elements, all connected in an intricate arrangement. The device appears to be made of metal, with a light-colored finish. The background is a plain, light gray, which helps to isolate the device and highlight its details.
Image /page/6/Picture/7 description: The image shows a complex mechanical apparatus, possibly a component of a larger machine or a specialized tool. It features a series of interconnected metal frames, gears, and adjustable parts, suggesting a high degree of precision and functionality. The device is mounted on a base, allowing for stability and controlled movement. The overall design indicates it may be used for manufacturing, scientific research, or engineering applications.
Image /page/6/Picture/8 description: The image shows a medical device, possibly an MRI machine or a component of one. The top part of the image shows a person lying on a table, positioned within a large, circular device. The bottom part of the image shows a close-up of a similar circular device, which appears to be a coil or part of the imaging system, mounted on a platform.
{7}------------------------------------------------
Image /page/7/Picture/1 description: The image shows the logo for NORAS MRI products. The logo is in blue and white. The word "NORAS" is in large, bold letters. To the right of the word "NORAS" is a line that resembles a heart rate monitor. The words "MRI products" are stacked on top of each other to the right of the line.
#### 5. Indications for Use
# For Siemens:
The NORAS OR Head Holder Flexibility and the NORAS OR Head Coils 1.5T / 3.0T are used for intra-operative MR imaging during open-skull neurosurgery.
The NORAS OR Head Holder is used for safely securing the patient's head during the intervention.
The NORAS OR Head Holder Flexibility together with the NORAS OR Head Coil 1.5T / 3.0T are suitable for use with the MR system MAGNETOM Aera / Skyra and the Combi-Dockable-Table together with Trumpf OR Tables TrueSystem 7500 (EU/US Version) and as well as together with Maquet OR Tables Magnus (EU/US Version) and Alpha Maquet Plus (EU/US Version).
# For Philips:
The NORAS OR Head Holder Flexibility and the NORAS OR Head Coils 1.5T / 3.0T are used for intra-operative MR imaging during open-skull neurosurgery.
The NORAS OR Head Holder is used for safely securing the patient's head during the intervention.
The NORAS OR Head Holder Flexibility together with the NORAS OR Head Coil 1.5T / 3.0T are suitable for Philips MR system Ingenia 1.5T/3T in combination with Maquet Transfer Board together with Maquet OR table.
#### 6. Substantial Equivalence
NORAS MRI products GmbH believes that, within the meaning of the Safe Medical Devices Act of 1990, the NORAS OR Head Holder Flexibility is substantially equivalent to the following OR Head Holder:
| Predicate<br>Device Name<br>and<br>Manufacturer | 510(k)<br>Number | Clearance<br>Date | Product<br>Code | Comparable<br>Properties |
|-------------------------------------------------|------------------|-------------------|-----------------|-----------------------------------|
| NORAS OR Head<br>Holder | K071179 | April 27-2007 | MOS, HBL | Fixation of the<br>patient's head |
{8}------------------------------------------------
Image /page/8/Picture/1 description: The image shows the logo for NORAS MRI products. The logo features the word "NORAS" in bold, blue letters, with a horizontal line extending from the right side of the word. The line then forms a heartbeat-like waveform, with the words "MRI products" stacked vertically to the right of the waveform. The logo is set against a white background, with a blue shape on the left side.
## Summary of Technological Characteristics of the Principal Device as 7. Compared with the predicate Device
In comparison to the existing OR head holders, the OR Head Holder Flexibility PN: 114464 includes only some minor mechanical changes which contribute to more flexibility in patient positioning. According to our internal evaluations as well the external tests done by VDE the new components such as Z-joint meet the requirements of IEC 60601-1 3.ed (clause 9.8) and do not adversely affect the safety of the design.
#### 8. General Safety and Effectiveness Concerns
The NORAS OR Head Holder Flexibility combined with the NORAS OR Head Coil 1.5T / 3T will conform to the FDA recognized NEMA Standards for the measurement of performance and safety parameters and the IEC standards for safety issues with the Magnetic Resonance Imaging Devices, IEC 60601-2-33:2002. This will assure that the performance of this device can be considered safe and effective when used with the currently available Siemens MAGNETOM Aera/Skyra 1.5T/3T as well as Philips Ingenia 1.5T/3T systems.
#### Conclusion as to Substantial Equivalence 9.
NORAS MRI products GmbH believes that, within the definition of the Safe Medical Devices Act of 1990, the NORAS OR Head Holder Flexibility is substantially equivalent to the predicate device listed above.
Zahed Sedighiani Quality and Requlatory Affairs Manager June 25, 2014
{9}------------------------------------------------
Predicate graph will load when search results are available.
Embedding visualization will load when search results are available.
PDF viewer will load when search results are available.
Loading panels...
Select an item from Submissions
Click any panel, subpart, regulation, product code, or device to see details here.
Section Matches
Results will appear here.
Product Code Matches
Results will appear here.
Special Control Matches
Results will appear here.
Loading collections...
Loading
My Alerts
You will receive email notifications based on the filters and frequency you set for each alert.
Sort by:
Create Alert
Search Filters
Agent Token
Create a read-only bearer token for Claude, ChatGPT, or other agents that can call HTTP APIs.
Copy this now. It will not be shown again.
Connected apps
Apps you authorized through browser sign-in. Disconnecting revokes their access immediately.
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.