K181731 · Mri Interventions, Inc. · GWG · Nov 20, 2018 · Neurology
Device Facts
Record ID
K181731
Device Name
MR Compatible Aspiration Kit
Applicant
Mri Interventions, Inc.
Product Code
GWG · Neurology
Decision Date
Nov 20, 2018
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 882.1480
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
The MR Compatible Aspiration System is used for controlled aspiration of blood, cystic components of tumors, abscess, colloid cysts, and cerebrospinal fluid using a manual syringe during surgery of the Ventricle System or Cerebrum.
Device Story
MR Compatible Aspiration Kit (MCA Kit) is an accessory to the ClearPoint System used for image-guided neurosurgery. Device consists of a guide, sheath, stylet, depth stops, and cannula. Operated manually by a physician using a syringe to create vacuum pressure (up to 29 inHg) for aspiration of blood, cystic tumor components, abscesses, colloid cysts, or cerebrospinal fluid from the brain. Designed for MR compatibility using non-metallic materials. Output is the physical removal of target tissue or fluid. Benefits include controlled, image-guided aspiration during neurosurgical procedures.
Clinical Evidence
Bench testing only. Accuracy testing demonstrated mean error <1.0mm and mean angular error <1°. Compatibility testing verified integration with the ClearPoint SmartFrame XG under tensile, torque, and lateral loading. Flow and leak testing confirmed the ability to aspirate 10cc of simulated materials (blood, cysts, abscesses) at 29.0 inHg without collapse or leakage.
Indicated for patients undergoing surgery of the Ventricle System or Cerebrum requiring controlled aspiration of blood, cystic tumor components, abscesses, colloid cysts, or cerebrospinal fluid.
Regulatory Classification
Identification
A neurological endoscope is an instrument with a light source used to view the inside of the ventricles of the brain.
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November 20, 2018
MRI Interventions, Inc. % John Smith Partner Hogan Lovells US LLP 555 Thirteenth St. NW Washington, District of Columbia 20004
Re: K181731
Trade/Device Name: MR Compatible Aspiration Kit Regulation Number: 21 CFR 882.1480 Regulation Name: Neurological Endoscope Regulatory Class: Class II Product Code: GWG Dated: October 24, 2018 Received: October 24, 2018
Dear John Smith:
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 mav, therefore, market the device, subject to the general controls provisions of the Act. Although this letter refers to your product as a device, please be avare that some cleared products may instead be combination products. The 510(k) Premarket Notification Database located at https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfpmn/pmn.cfm identifies combination product submissions. 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
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requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801); medical device reporting of medical device-related adverse events) (21 CFR 803) for devices or postmarketing safety reporting (21 CFR 4, Subpart B) for combination products (see https://www.fda.gov/CombinationProducts/GuidanceRegulatoryInformation/ucm597488.html; good manufacturing practice requirements as set forth in the quality systems (OS) regulation (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
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 comprehensive regulatory information about mediation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/MedicalDevices/DeviceRegulationandGuidance/) and CDRH Learn (http://www.fda.gov/Training/CDRHLearn). Additionally, you may contact the Division of Industry and Consumer Education (DICE) to ask a question about a specific regulatory topic. See the DICE website (http://www.fda.gov/DICE) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
Sincerely.
For
John Marler -S
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) K181731
Device Name MR Compatible Aspiration System
Indications for Use (Describe)
The MR Compatible Aspiration System is used for controlled aspiration of blood, cystic components of tumors, abscess, colloid cysts, and cerebrospinal fluid using a manual syringe during surgery of the Ventricle System or Cerebrum.
Type of Use (Select one or both, as applicable)
| <div style="display:flex; align-items:center;"> <input checked="true" type="checkbox"/> <span>Transaction Not in 31 CFR 501.615(a) or (b)</span> </div> | <div style="display:flex; align-items:center;"> <input type="checkbox"/> <span>Service Transaction Not in 31 CFR 501.615(c)</span> </div> |
|---------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------|
|---------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------|
|× | Prescription Use (Part 21 CFR 801 Subpart D)
| | Over-The-Counter Use (21 CFR 801 Subpart C)
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#### 510(k) SUMMARY MRI Interventions, Inc.'s MR Compatible Aspiration Kit
#### Submitter's Name, Address, Telephone Number, Contact Person and Date Prepared
Hogan Lovells, US LLP 555 Thirteenth Street, NW Washington, DC 20004 Phone: 202-637-5600 Fax: 202-637-5910 Contact Person: John J. Smith, M.D., J.D.
Date Prepared: November 20, 2018
#### Name of Device and Name/Address of Sponsor
MR Compatible Aspiration Kit ("MCA Kit")
MRI Interventions, Inc. 5 Musick Irvine, CA 92618
Common or Usual Name:
Neurological Endoscope
Classification 21 C.F.R. § 882.1480
Product Code GWG
Predicate Device Penumbra Apollo System (K152699)
#### Intended Use / Indications for Use
The MR Compatible Aspiration System is used for controlled aspiration of blood, cystic components of tumors, abscess, colloid cysts, and cerebrospinal fluid using a manual syringe during surgery of the Ventricle System or Cerebrum.
#### Device Description
The MCA Kit is an accessory to the cleared ClearPoint System (K171257). The MCA Kit consists of a MCA device guide, guide sheath, stylet, depth stops, cannula (with attached tube) and adapter. The MCA Kit is designed to aid a physician in the removal of specific tissue or fluid types from the brain during image guided surgery. It is MR safe, as all materials are non-metallic. The MCA Kit is comprised of single use only, sterile-packaged disposable components that are packaged together.
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| Kit<br>Configuration | Guide Size<br>(Diameter) | Sheath<br>(Outer) | Cannula Size<br>(Outer Diameter) | Cannula Length<br>(Approximate) | Maximum Target<br>(mm) | Depth | |
|----------------------|--------------------------|-------------------|----------------------------------|---------------------------------|------------------------|-------|--|
| 15 Fr – Long | 15 Fr | 12 Fr | 12 Fr | 12.2" / 31 cm | 120 | | |
| 17 Fr – Long | 17 Fr | 14 Fr | 14 Fr | 12.2" / 31 cm | 120 | | |
| 19 Fr – Long | 19 Fr | 16 Fr | 16 Fr | 12.2" / 31 cm | 120 | | |
| 15 Fr – Short | 15 Fr | 12 Fr | 12 Fr | 9.4" / 24 cm | 70 | | |
| 17 Fr – Short | 17 Fr | 17 Fr | 14 Fr | 14 Fr | 9.4" / 24 cm | 70 | |
| 19 Fr – Short | 19 Fr | 19 Fr | 16 Fr | 16 Fr | 9.4" / 24 cm | 70 | |
The MCA Kit is available in the following configurations:
## Performance Data
Bench testing was performed to verify the MCA Kit's compatibility with the ClearPoint System, accuracy, and substantial equivalence to the predicate aspiration device.
| Test | Test Method Summary | Results | |
|---------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------|
| Accuracy<br>Testing | The company used the same ground<br>truth procedure and test methods that<br>were used in the accuracy testing<br>provided in support of K142505 and<br>K171257 for the ClearPoint System.<br>The test set-up utilized only the scalp<br>mount bases and SmartFrame XG,<br>since the MCA Kit must be used with<br>the SmartFrame XG to allow device<br>guide insertion, and the scalp mount<br>base is the most likely configuration to<br>be used clinically. Placements were<br>performed using the 12 Fr x 30 cm and<br>16 Fr x 30 cm MCA Kits, which<br>represent the smallest and largest OD<br>sizes; accordingly, the test results<br>support the performance of all sizes of<br>the MCA kit. Target depth was 125<br>mm from the base-mounting surface<br>for all placements. | Results from the company's bench<br>accuracy tests demonstrated that the<br>mean error was below 1.0mm, with the<br>highest standard deviation being<br>0.75mm in the X direction and highest<br>99% upper confidence limit of 1.48mm<br>in the X direction. The mean angular<br>error was below 1°, with a standard<br>deviation of 0.34° and 99% upper<br>confidence limit of 0.72°. These values<br>are below the 2mm and 2° accuracy<br>limits for a stereotaxic device intended<br>for general neurological use. | |
| | MCA-Kit Device<br>Guide–<br>SmartFrame<br>XG<br>Compatibility | Performance testing was completed to<br>verify that the device guide and<br>SmartFrame XG are compatible per<br>pre-defined acceptance criteria.<br>Testing included insertion and<br>retention of the Device Guide and<br>Adapter to the SmartFrame under<br>tensile and torque loading, stability of<br>the Guide Sheath-Stylet and Guide<br>Sheath-Cannula under lateral loading<br>when inserted in the SmartFrame, and<br>accuracy with the SmartFrame. | All acceptance criteria were met to<br>demonstrate that the MCA Kit<br>components are compatible with the<br>cleared ClearPoint System SmartFrame<br>XG. |
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| Flow and Leak<br>Testing | Testing was conducted to confirm that<br>the device could aspirate at least 10cc<br>of various materials simulating blood,<br>clotted blood, cystic components of<br>tumors, abcesses, colloid cysts, and<br>cerebrospinal fluid without leaking or<br>collapsing and at an acceptable flow<br>rate. | The tests demonstrated that the MCA<br>Kit functions as intended and is<br>substantially equivalent to the legally<br>marketed predicate |
|--------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Aspiration Test | Testing was performed to confirm the<br>device remains operable for a limited<br>period of time at 29.0 inHg for the MCA<br>Kit Cannulas Twelve Fr. and 16 Fr.<br>Cannulas that have undergone worst-<br>case conditioning were used for this<br>test. Plugged cannulas were<br>evaluated under high vacuum<br>generated by a pump to create worst-<br>case conditions. The change in device<br>inner diameter (I.D.) was measured to<br>confirm that the device's integrity was<br>maintained during the aspiration. The<br>device was also verified to remain<br>undamaged after exposure to the<br>conditions. | All Cannulas tested were able to<br>withstand collapsing, leaking, or failing<br>in any other manner when experiencing<br>a minimum aspiration pressure of 29.0 inHg. The measured change in the<br>Rigid section I.D. of the Cannulas was<br>0.0% for the 12 Fr., and 0.8% for the 16<br>Fr. The flexible Tubing had a measured<br>change in I.D. of 1.3% for the 12 Fr. and<br>2.9% for the 16 Fr. Cannulas. The<br>device can operate for a limited period<br>of time at an aspiration pressure of 29.0 inHg without failing. |
The MCA Kit complies with the following recognized consensus standards:
- . ANSI/AAMI/ISO 11137-2: Sterilization of Health Care Products – Radiation – Establishing the sterilization dose - Method VDmax
- ISO 10993-1: Biological evaluation of medical devices Part 1: Evaluation and testing within . a risk management process
- ASTM F2096-11: Standard Test Method for Detecting Gross Leaks in Packaging by Internal ● Pressurization (Bubble Test)
- ASTM D4196-16: Standard Test Method for Confirming the Sterility of Membrane Filters ●
- . ASTM F1980-16: Standard Guide for Accelerated Aging of Sterile Barrier Systems for Medical Devices
# Substantial Equivalence
The Apollo System and MR Compatible Aspiration Kit have substantially similar intended use and indications for use. The table below presents a comparison of the technological characteristics of the MR Compatible Aspiration Kit and those of the predicate device.
| | Apollo System<br>K152699 | MR Compatible Aspiration Kit |
|---------------------------------|---------------------------------------------------------------|-------------------------------------------------------------------------------|
| Wand<br>(Cannula)<br>O.D / I.D. | 1 size:<br>Body = .083" / .069"<br>Distal Tip = .072" / .059" | 3 sizes:<br>12F = .158" / .138"<br>14F = .183" / .163"<br>16F = .208" / .190" |
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| | Apollo System<br>K152699 | MR Compatible Aspiration Kit |
|---------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------|
| Usable Length | 27.2 cm | Maximum insertion length is 12.5cm due to height of SmartFrame |
| Basic<br>Operating<br>Principle | AC power is converted from the generator into vibrational energy to the distal tip of the wand, which removes tissue and/or fluids through and aspiration lumen | Manual actuation of the syringe plunger provides vacuum to the distal tip of the cannula which removes tissue and/or fluids through the aspiration lumen |
| Aspiration | 0–29 in.HG | 0–29 in.HG |
| Disposable<br>Components | Wand Collection Canister, filter and pump-canister tubing Irrigation Tubing | Cannula w/ tubing Stylet Guide Sheath Depth Stop SmartFrame Adapter and Device Guide |
| Power<br>Requirements | 100">–115V (60Hz),<br>100V (50Hz) | N/A<br>Manual Control |
| Navigation | Image Guidance | Image Guidance |
## Conclusion
The MCA Kit and Apollo System have substantially similar intended use and indications for use, as well as similar technological characteristics. The minor technological differences in the MCA Kit compared to the Apollo System do not raise new questions of safety or effectiveness. The MCA Kit's accuracy, compatibility with the ClearPoint System SmartFrame XG, flow, leak, and aspiration testing further confirm that the device performs as intended and is substantially equivalent to the legally marketed predicate.
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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
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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.