GYRUS ENT COGENT 2/G2 SYSTEM (GENERATOR,ACCESSORIES SOMNOPLASTY ELECTRODES AND PLASMACISION ELECTRODES)
K021777 · Gyrus Ent LLC · GEI · Aug 26, 2002 · General, Plastic Surgery
Device Facts
Record ID
K021777
Device Name
GYRUS ENT COGENT 2/G2 SYSTEM (GENERATOR,ACCESSORIES SOMNOPLASTY ELECTRODES AND PLASMACISION ELECTRODES)
Applicant
Gyrus Ent LLC
Product Code
GEI · General, Plastic Surgery
Decision Date
Aug 26, 2002
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 878.4400
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
The PlasmaKinetic Generator section of the GII RF Workstation is indicated for ablation of coagulation of soft tissue and hemostasis of blood vessels in otorhinolaryngology (Head and Neck) surgery including: Adenoidectomy; Cysts; Head, Neck, Oral, and Sinus Surgery; Mastoidectomy; Myringotomy with effective Hemorrhage Control; Nasal Airway Obstruction by Reduction of Hypertrophic Nasal Turbinates; Nasopharyngeal / Laryngeal indications including Tracheal Procedures, Laryngeal Polypectomy, and Laryngeal Lesion Debulking; Neck Mass; Papilloma Keloids; Submucosal Palatal Shrinkage; Tonsillectomy; Traditional Uvulopalatoplasty (RAUP); Tumors; Tissue in the Uvula/Soft Palate for the Treatment of Snoring. The Gyrus ENT Somnoplasty TCRF Generator section of the GII RF Workstation with the Temperature Controlled Radio-frequency (Somnoplasty®) Electrodes is indicated for coagulation of soft tissue including: The coagulation of enlarged tonsils in patients 13 years of age and older; the reduction of the incidence of airway obstructions, e.g., base of tongue, soft palate, etc., in patients suffering from UARS or OSAS; tissue coagulation in the inferior turbinates; and tissue coagulation in the uvula/soft palate which may reduce the severity of snoring in some individuals. The system is intended for use by qualified medical personnel trained in the use of electrosurgical equipment and familiar with potential complications that may arise during or following Head and Neck surgery.
Device Story
G II Radio-frequency Workstation combines two previously cleared generators: Somnoplasty TCRF Generator and PlasmaKinetic Generator. Device operates in monopolar and bipolar modes. Monopolar mode provides temperature-controlled RF energy for tissue coagulation; features controls for max temperature/energy and readouts for total energy, impedance, dual-thermocouple temperature, and time. Bipolar mode uses PlasmaCision/bipolar instruments for ablation, resection, and hemostasis; features controls for output waveform and power. Used in ENT surgical settings by qualified medical personnel. System includes workstation, electrodes, bipolar instruments, footswitch, and cables. Output allows surgeons to perform precise tissue reduction and hemostasis, benefiting patients by treating snoring, airway obstructions, and various ENT pathologies.
Clinical Evidence
Bench testing only. Performance testing validated the device against predicate devices, demonstrating similar performance characteristics.
Technological Characteristics
Electrosurgical generator with monopolar and bipolar modes. Monopolar mode: temperature-controlled RF, dual-thermocouple sensing. Bipolar mode: PlasmaCision/bipolar RF energy. Connectivity: front panel connectors for active/dispersive electrodes and dual bipolar instruments; rear panel footswitch connection. Form factor: workstation console.
Indications for Use
Indicated for ENT soft tissue ablation, resection, coagulation, and hemostasis in patients requiring head/neck/oral/sinus surgery, adenoidectomy, tonsillectomy, or snoring/airway obstruction treatment. Tonsil coagulation indicated for patients 13+. Contraindicated for patients with heart pacemakers or electronic implants, or when electrosurgery is contrary to patient interest.
Regulatory Classification
Identification
An electrosurgical cutting and coagulation device and accessories is a device intended to remove tissue and control bleeding by use of high-frequency electrical current.
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R.O.A.T.Y.
510(k) Summary of Safety and Effectiveness
# G II Radio-frequency Workstation & Accessories
| Submitted by: | Gyrus ENT<br>2925 Appling Rd.<br>Bartlett, TN 38133 |
|------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Contact Person: | Jeffrey W. Cobb |
| | Vice President, Regulatory/Clinical Affairs & Quality |
| Telephone: | 901-373-2673 |
| Facsimile: | 901-373-0242 |
| Date Summary Prepared: | August 19, 2002 |
| Name of the Device: | G II Radio-frequency Workstations |
| Common/Usual Name: | Electrosurgical Generator and Accessories |
| Classification Name: | Electrosurgical Cutting & Coagulation Device and<br>Accessories (per 21 CFR 878.4400) |
| Predicate Devices: | - Gyrus ENT Somnoplasty Generator (K020067)<br>- Gyrus Medical Inc PlasmaKinetic Generator<br>(K003060)<br>- Arthrocare Sinus Electrosurgery Generator (K973478)<br>- Arthrocare ENTec Plasma Wands (K014290)<br>- ENTec EVac Plasma Wands (K011279)<br>- Gyrus ENT (Smith & Nephew) Hemostatix Scalpel<br>(K002021)<br>- Gyrus ENT TCRF Somnoplasty Electrodes<br>(K982717), (K973618), (K971450), & (K020778) |
## Description:
The Gyrus ENT G II RF Workstation is a combination of two previously cleared radio-frequency generators:
- 1. The Gyrus ENT Somnoplasty Temperature-Controlled Radio-frequency Generator -K020067, and
- 2. The Gyrus Medical Inc. (formerly Everest Medical Corporation) PlasmaKinetic™ Generator - K003060.
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## Somnoplasty TCRF Generator Section of the GII RF Workstation
Statement of Intended Use: The Gyrus ENT Somnoplasty Generator section of the G II Radiofrequency Workstation is indicated for coagulation of soft tissue including:
| | Indication | Predicate Device 510(k) |
|----|--------------------------------------------------------------------------------------------------------------------------------------------|-------------------------|
| 1. | The coagulation of enlarged tonsils in patients 13 years of age and older | K020778 |
| 2. | The reduction of the incidence of airway obstructions, e.g., base of tongue, soft<br>palate, etc., in patients suffering from UARS or OSAS | K982717<br>K971450 |
| 3. | Tissue coagulation in the inferior turbinates | K973618 |
| 4. | Tissue coagulation in the uvula/soft palate which may reduce the severity of<br>snoring in some individuals | K982717<br>K971450 |
## PlasmaKinetic Generator Section of the GII RF Workstation
The PlasmaKinetic Generator section of the GII RF Workstation uses those bipolar and PlasmaCision instruments described in our original submission (K021777) dated May 29, 2002, and subsequent correspondence related to K021777 dated July 10, 2002, and July 19, 2002.
As stated in the original submission, K021777, the PlasmaKinetic Generator section of the GII RF Workstation is substantially equivalent to the ArthroCare ENTec Plasma Wand cleared under 510(k) Nos. K014290, K013463, K011279, K000228, and K973478. Testing was presented in our July 19, 2002, supplement to K021777 that demonstrated the The PlasmaKinetic Generator section of the GII RF Workstation performed similarly to the ArthroCare ENTec Plasma Wand.
Statement of Intended Use: The PlasmaKinetic Generator section of the GII RF Workstation is indicated for ablation, resection and coagulation of soft tissue and hemostasis of blood vessels in otorhinolaryngology (ENT) surgery including:
| | Indication | Predicate Device 510(k) |
|-----|--------------------------------------------------------------------------------------------------------------------------------|-------------------------|
| 1. | Adenoidectomy | K014290 |
| 2. | Cysts | K014290 |
| 3. | Head, Neck, Oral, and Sinus Surgery | K014290 |
| 4. | Mastoidectomy | K014290 |
| 5. | Myringotomy with effective Hemorrhage Control | K014290 |
| 6. | Nasal Airway Obstruction by Reduction of Hypertrophic Nasal Turbinates | K014290 |
| 7. | Nasopharyngeal / Laryngeal indications including Tracheal Procedures,<br>Laryngeal Polypectomy, and Laryngeal Lesion Debulking | K014290 |
| 8. | Neck Mass | K014290 |
| 9. | Papilloma Keloids | K014290 |
| 10. | Submucosal Palatal Shrinkage | K014290 |
| 11. | Tonsillectomy | K014290 |
| 12. | Traditional Uvulopalatoplasty (RAUP) | K014290 |
| 13. | Tumors | K014290 |
| 14. | Tissue in the Uvula/Soft Palate for the Treatment of Snoring | K014290 |
This device is intended for use by qualified medical personnel trained in the use of electrosurgery.
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## The Gyrus ENT G II Radio-frequency Workstation has two modes of operation:
- The monopolar mode has controls for maximum temperature and energy delivered. The unit ﮯ has readouts for total energy delivered, impedance, temperature for two thermocouples and time of energy delivery.
- -The bipolar mode has controls for output waveform type and power. The unit has readouts for set power and waveform.
Connectors on the front panel include the monopolar connector for active electrode and dispersive electrode and separate dual bipolar connectors for PlasmaCision electrodes and bipolar instruments. The foot pedal is connected on the back panel. Accessories included with the G II Radiofrequency Workstation include the PlasmaCision electrodes, bipolar instruments, connector cable, footswitch and a power cable.
### Comparison to Predicate Devices:
The Gyrus ENT G II Radio-frequency Workstation has been carefully compared to legally marketed devices with respect to intended use and technological characteristics. In addition, performance testing has been done to validate the performance of the device. The comparison and validation results presented show that the device is substantially equivalent to predicate devices and is safe and effective in its intended use.
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Image /page/3/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a circular border with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES • USA" arranged around it. Inside the circle is an abstract symbol resembling an eagle or a stylized human profile, composed of three curved lines.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
AUG 2 6 2002
Gyrus ENT Jeffrey W. Cobb Vice-President, Regulatory/Clinical Affairs & Quality 2925 Appling Road Bartlett, Tennessee 38133
Re: K021777
Trade/Device Name: Gyrus G II Radio-frequency Workstation & Accessories Regulation Number: 878.4400 Regulation Name: Electrosurgical cutting & coagulation device and accessories Regulatory Class: Class II Product Code: GEI Dated: May 29, 2002 Received: May 30, 2002
Dear Mr. Cobb:
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. Iisting of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to such additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.
Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
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Page 2 – Mr. Jeffrey W. Cobb
This letter will allow you to begin marketing your device as described in your Section 510(k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification for your device and thus, permits your device to proceed to the market.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801 and additionally 21 CFR Part 809.10 for in vitro diagnostic devices), please contact the Office of Compliance at (301) 594-4659. Additionally, for questions on the promotion and advertising of your device, please contact the Office of Compliance at (301) 594-4639. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 807.97). Other general information on your responsibilities under the Act may be obtained from the Division of Small Manufacturers, International and Consumer Assistance at its toll-free number (800) 638-2041 or (301) 443-6597 or at its Internet address http://www.fda.gov/cdrh/dsma/dsmamain.html
Sincerely yours,
Celia M. Witten, Ph.D., M.D.
Director Division of General, Restorative and Neurological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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# Exhibit A
## Indications for Use
### 510(k) Number (if known):
K021777
Device Name:
G II Radio-frequency Workstation & Accessories
### Indications For Use:
The PlasmaKinetic Generator section of the GII RF Workstation is indicated for ablation of coagulation of soft tissue and hemostasis of blood vessels in otorhinolaryngology (Head and Neck) surgery including:
· Adenoidectomy
- Cysts
- · Head, Neck, Oral, and Sinus Surgery
- · Mastoidectomy
- · Myringotomy with effective Hemorrhage Control
- · Nasal Airway Obstruction by Reduction of Hypertrophic Nasal Turbinates
- · Nasopharyngeal / Laryngeal indications including Tracheal Procedures, Laryngeal Polypectomy, and Laryngeal Lesion Debulking
- · Neck Mass
- Papilloma Keloids
- · Submucosal Palatal Shrinkage
- · Tonsillectomy
- · Traditional Uvulopalatoplasty (RAUP)
- Tumors
- · Tissue in the Uvula/Soft Palate for the Treatment of Snoring
The Gyrus ENT Somnoplasty TCRF Generator section of the GII RF Workstation with the Temperature Controlled Radio-frequency (Somnoplasty®) Electrodes is indicated for coagulation of soft tissue including:
The coagulation of enlarged tonsils in patients 13 years of age and older; the reduction of the incidence of airway obstructions, e.g., base of tongue, soft palate, etc., in patients suffering from UARS or OSAS; tissue coagulation in the inferior turbinates; and tissue coagulation in the uvula/soft palate which may reduce the severity of snoring in some individuals.
The system is intended for use by qualified medical personnel trained in the use of electrosurgical equipment and familiar with potential complications that may arise during or following Head and Neck surgery.
#### Contraindications for Use:
There are no known absolute contraindications to the use of radio-frequency surgery. The use of the GNT G II Radio-frequency Workstation is contraindicated when, in the physician, electrosurgical procedures would be contrary to the best interests of the patient. The use of the system is also contraindicated for patients with heart pacemakers or other electronic device implants.
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
| Prescription Use X<br>(Per 21 CFR 801.109) | OR | Over-The-Counter Use<br>(Optional Format 1-2-96) |
|--------------------------------------------|----|--------------------------------------------------|
|--------------------------------------------|----|--------------------------------------------------|
Concurrence of CDRH, Office of Device Evaluation (ODE)
(Division Sign-Off)
Division of General, Restorative and Neurological Devices
| 510(k) Number | K021777 |
|---------------|---------|
|---------------|---------|
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.