The hekaDrill system is intended for use in surgical procedures involving incision / cutting, removal, drilling, and sawing of soft and hard tissue and bone. The specifically intended for use in neurologic and general surgical procedures.
Device Story
The hekaDrill System is a surgical power tool platform comprising electric and pneumatic handpieces, a power console, footswitches, attachments, and cutting tools. It is used by surgeons in operating rooms for neurologic and general surgical procedures involving bone and soft tissue. The system transforms electrical or pneumatic energy into mechanical rotation to drive interchangeable cutting tools. The surgeon operates the device via a footswitch to control speed and power, enabling precise tissue removal or incision. The system provides the surgeon with tactile and visual feedback during operation, facilitating controlled bone and tissue manipulation. The device benefits patients by providing a reliable, versatile tool for complex surgical access and resection, reducing the need for multiple specialized instruments.
Clinical Evidence
Bench testing only. Performance validation compared cutting performance (vibration, noise, control) against predicate devices, showing equivalent or superior results. Electrical safety and electromagnetic compatibility testing confirmed conformance to IEC 60601-1:2005 and IEC 60601-1-2:2014. Biocompatibility testing (L929 MEM Elution, Kligman Maximization, Intracutaneous Injection, Systemic Toxicity, Pyrogenicity, and Indirect Hemolysis) confirmed the device is non-cytotoxic, non-sensitizing, non-irritant, non-toxic, non-pyrogenic, and non-hemolytic.
Technological Characteristics
System includes electric and pneumatic handpieces, power console, footswitches, and attachments. Energy sources: electric and pneumatic. Connectivity: wired connection cables. Sterilization: reusable components (handpieces, attachments, console) are non-sterile; single-use components (cutting tools, irrigation kits) are sterile. Electrical safety: IEC 60601-1:2005. Electromagnetic compatibility: IEC 60601-1-2:2014. Materials passed ISO 10993 biocompatibility testing.
Indications for Use
Indicated for patients undergoing neurologic and general surgical procedures requiring incision, cutting, removal, drilling, or sawing of soft tissue, hard tissue, and bone.
Regulatory Classification
Identification
An electric cranial drill motor is an electrically operated power source used with removable rotating surgical cutting tools or drill bits on a patient's skull.
Predicate Devices
Midas Rex Legend EHS Electric Drill System (K081475)
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June 3, 2021
Zethon Ltd Faith Green Quality and Regulatory Engineer 2 Halton Brook Business Park Aylesbury, Buckinghamshire HP22 5WF United Kingdom
Re: K193630
Trade/Device Name: hekaDrill Regulation Number: 21 CFR 882.4360 Regulation Name: Electric cranial drill motor Regulatory Class: Class II Product Code: HBC, HBB, HBE, HSZ, GEY
Dear Faith Green:
The Food and Drug Administration (FDA) is sending this letter to notify you of an administrative change related to your previous substantial equivalence (SE) determination letter dated April 9, 2021. Specifically. FDA is updating this SE Letter to remove the ERL product code, since the device was not reviewed for ENT indications, as an administrative correction. Also, the GEY product code was added.
Please note that the 510(k) submission was not re-reviewed. For questions regarding this letter please contact Adam Pierce, OHT5: Office of Neurological and Physical Medicine Devices, adam.pierce@fda.hhs.gov, (240) 402-6128.
Sincerely,
# Adam D. Pierce -S 2021.06.03 11:40:47 -04'00'
Adam D. Pierce, Ph.D. Assistant Director DHT5A: Division of Neurosurgical, Neurointerventional and Neurodiagnostic Devices OHT5: Office of Neurological and Physical Medicine Devices Office of Product Evaluation and Quality Center for Devices and Radiological Health
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Image /page/1/Picture/0 description: The image contains the logo of the U.S. Food and Drug Administration (FDA). On the left is the Department of Health & Human Services USA logo. To the right of that is the FDA logo, which is a blue square with the letters "FDA" in white. To the right of the blue square is the text "U.S. FOOD & DRUG ADMINISTRATION" in blue.
April 9, 2021
Zethon Ltd Faith Green Quality and Regulatory Engineer 2 Halton Brook Business Park Aylesbury, HP22 5WF United Kingdom
# Re: K193630
Trade/Device Name: hekaDrill System Regulation Number: 21 CFR 882.4360 Regulation Name: Electric Cranial Drill Motor Regulatory Class: Class II Product Code: HBC, HBB, HBE, HSZ, ERL Dated: March 9, 2021 Received: March 12, 2021
# Dear Faith Green:
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. Although this letter refers to your product as a device, please be aware that some cleared products may instead be combination products. The 510(k) Premarket Notification Database located at https://www.accessdata.fda.gov/scripts/cdrl/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 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
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devices or postmarketing safety reporting (21 CFR 4. Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safety-reportingcombination-products); good manufacturing practice requirements as set forth in the quality systems (QS) 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 https://www.fda.gov/medical-device-safety/medical-device-reportingmdr-how-report-medical-device-problems.
For comprehensive regulatory information about mediation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/medicaldevices/device-advice-comprehensive-regulatory-assistance) and CDRH Learn (https://www.fda.gov/training-and-continuing-education/cdrh-learn). 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 (https://www.fda.gov/medical-device-advice-comprehensive-regulatoryassistance/contact-us-division-industry-and-consumer-education-dice) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
Sincerely.
# Adam D. Pierce -S 2021.04.09 15:22:46 -04'00'
Adam D. Pierce. Ph.D. Assistant Director DHT5A: Division of Neurosurgical, Neurointerventional and Neurodiagnostic Devices OHT5: Office of Neurological and Physical Medicine Devices Office of Product Evaluation and Quality Center for Devices and Radiological Health
Enclosure
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## DEPARTMENT OF HEALTH AND HUMAN SERVICES Food and Drug Administration
## Indications for Use
510(k) Number (if known) K193630
Device Name hekaDrill System
## Indications for Use (Describe)
The hekaDrill system is intended for use in surgical procedures involving incision / cutting, removal, drilling, and sawing of soft and hard tissue and bone. The specifically intended for use in neurologic and general surgical procedures.
Type of Use (Select one or both, as applicable)
> Prescription Use (Part 21 CFR 801 Subpart D)
Over-The-Counter Use (21 CFR 801 Subpart C)
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# Traditional 510(k) Submission
## 510(k) Summary
## 10 March, 2021
- I. Company: Zethon Ltd 2 Halton Brook Business Park Weston Road Aston Clinton Buckinghamshire HP22 5WF United Kingdom
- Contact: Faith Green Quality and Regulatory Engineer Telephone Number: (+44) 01296634090 Email: faith.green@zethon.com
#### II. Proprietary Trade Name: hekaDrill
- III. Common Name: High Speed System
- IV. Classification Name: Motor, Drill, Electric (21 CFR 882.4360) Motor, Drill, Pneumatic (21 CFR 882.4370) Motor, Surgical Instrument, AC-Powered (21 CFR 878.4820) Drills, Burs, Trephines & Accessories (21 CFR 882.4310)
#### V. Classification: Class II
- VI. Product Code: HBC, HBB, HBE, HSZ, GEY
## VII. Product Description:
The hekaDrill System consists of electric and pneumatic drill handpieces, a power console, footswitches, attachments, connection cables, irrigation tube kits, cutting tools, and system accessories. The handpieces, attachments, and system accessories are provided non-sterile and are reusable. The console and footswitches are reusable and are not intended to be sterilised. The cutting tools and irrigation tube kits are provided sterile and are single use.
## VIII. Indications for Use:
The hekaDrill system is intended for use in surgical procedures involving incision / cutting, removal, drilling, and sawing of soft and hard tissue and bone. The system is specifically intended for use in Neurologic and general surgical procedures.
## IX. Identification of Legally Marketed Devices (Predicate Devices)
- · Midas Rex Legend EHS Electric Drill System (K081475)
- · Midas Rex MR8 Drill System (K163565)
- Midas Rex MR7 Pneumatic High Speed System (K090112) .
- Midas Rex Legend System (K020069) .
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#### X. Comparison of the Technological Characteristics
The Midas Rex Drill Systems that are currently available on the market consist of both pneumatic and electric handpieces, consoles, footpedals, attachments, cutting tools and system accessories. The predicate device is similar to the system under review in that air or electric energy is used to supply power to the handpiece which then operates interchangeable cutting tools that are supported by interchangeable attachments. Both systems have the same indications for use and both use similar materials. A full comparison of the two devices demonstrated that any of the differences between the devices do not have an impact on safety and effectiveness or its ability to perform its intended use.
#### XI. Discussion of the Performance Testing
The following testing has been performed on the hekaDrill system in order to demonstrate the functionality of the device. A summary of this testing is as follows:
| Test performed | Description of testing | Conclusion |
|---------------------------------------------|----------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------|
| General Performance | | |
| Performance<br>Validation | Cutting performance was compared to<br>predicate drill system in terms of<br>vibration, noise, control and<br>performance. | Cutting performance was equivalent or<br>better to that of predicate device |
| Electrical Performance | | |
| Electrical Safety | Electric powered instruments<br>evaluated for electrical safety | Instruments conform to IEC 60601-<br>1:2005 for electrical safety. |
| Electromagnetic<br>Compatibility | Electric powered instruments<br>evaluated for electromagnetic<br>compatibility | Instruments conform to IEC 60601-1-<br>2:2014 for electromagnetic<br>compatibility. |
| Biocompatibility | | |
| Cytotoxicity - L929<br>MEM Elution | There was no biological reactivity<br>(Grade 0) of the cells exposed to the<br>test article extract. | Non-cytotoxic |
| Sensitization –<br>Kligman<br>Maximization | The extracts of the test article, elicited<br>no reaction at the challenge (0%<br>sensitization) | Non-sensitizer |
| Irritation –<br>Intracutaneous<br>Injection | The test article sites did not show a<br>significantly greater biological<br>reaction than the control article. | Non-irritant |
| Systemic Toxicity | The test article did not induce a<br>significantly greater biological<br>reaction than the control extracts. | Non-toxic |
| Pyrogenicity | The test article did not induce a<br>Pyrogenic response. | Non-pyrogenic |
| Indirect Hemolysis | The test article led to a hemolysis<br>index above the negative control of<br>0.14% | Non-hemolytic |
#### XII. Conclusions
The hekaDrill system is substantially equivalent to the predicate devices, as shown through comparisons and testing.
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.