K981916 · Valleylab, Inc. · GEI · Aug 28, 1998 · General, Plastic Surgery
Device Facts
Record ID
K981916
Device Name
LIGASURE VESSEL SEALING SYSTEM
Applicant
Valleylab, Inc.
Product Code
GEI · General, Plastic Surgery
Decision Date
Aug 28, 1998
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 878.4400
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
The LigaSure™ Vessel Sealing System includes a bipolar electrosurgical generator and dedicated bipolar electrosurgical instruments intended for use in general, laparoscopic and gynecologic procedures where ligation of vessels is desired. The system creates a vessel ligation (seal) by the application of bipolar electrosurgical RF energy (coagulation) to vessels interposed between the jaws of the device. The generator can also be used with standard bipolar devices where bipolar cutting or coagulation is desired. The indications for use include general, (including urologic, thoracic, plastic and reconstructive), laparoscopic and gynecological procedures where ligation of vessels is performed including such procedures as bowel resections, hysterectomies (both vaginal and abdominal), laparoscopic cholesystectomies, laparoscopically assisted vaginal hysterectomies, gall bladder procedures, Nissen fundoplication, adhesiolysis, oophorectomy, etc. The devices can be used on vessels up to 7 mm. and bundles as large as will fit in the jaws of the instruments.
Device Story
System comprises bipolar electrosurgical generator and dedicated open/laparoscopic instruments; inputs vessel tissue or vascular bundles between instrument jaws; applies bipolar RF energy to achieve coagulation/desiccation; creates vessel ligation as alternative to mechanical clips, staples, or sutures. Used in OR by surgeons; generator also supports standard bipolar devices for cutting/coagulation. Benefits include effective vessel sealing up to 7 mm; reduces reliance on mechanical ligation.
Clinical Evidence
Bench testing and preclinical laboratory studies (acute and chronic) performed to verify design specifications and functional performance. No human clinical trial data reported.
Technological Characteristics
Isolated, microprocessor-based bipolar electrosurgical generator. Features three bipolar modes: standard, macro, and vessel sealing. Instruments include reusable forceps with snap-in disposable electrodes (open) and 5 mm diameter sterile single-use laparoscopic devices. Energy source: bipolar RF. Connectivity: accepts standard bipolar devices.
Indications for Use
Indicated for vessel ligation in general, laparoscopic, and gynecologic procedures (urologic, thoracic, plastic/reconstructive, bowel resection, hysterectomy, cholecystectomy, Nissen fundoplication, adhesiolysis, oophorectomy). Suitable for vessels up to 7 mm and tissue bundles fitting within instrument jaws.
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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AUG 28 1998
## SUMMARY OF SAFETY AND EFFECTIVENESS INFORMATION VALLEYLAB LIGASURE™ VESSEL SEALING SYSTEM
#### Submitter Information I.
K981916
Valleylab Inc a division of United States Surgical Corporation 5920 Longbow Drive Boulder, Colorado 80301 Contact: Charles M. Copperberg Telephone No. : 303-530-6343
Date Summary Prepared: 08/27/98
#### II. Name of Device
Proprietary Name: LigaSure™ Vessel Sealing System including the LigaSure™ Vessel Sealing Generator and LigaSure™ Open and Laparoscopic Instruments
Common or Usual Name: Bipolar Electrosurgical Generator with bipolar electrosurgical open and laparoscopic instruments
Classification Name: CFR 878.4400, Electrosurgical Cutting and Coagulation Device and Accessories and 21 CFR 884.4120 Gynecologic Electrocautery and Accessories
#### ш. Predicate Devices
The LigaSure™ Vessel Sealing Generator is a bipolar generator which is substantially equivalent to the following Valleylab electrosurgical generators: Force FX (K944602), Force 300 (K953195) and NS2000 (K946177).
The LigaSure™ Open and Laparoscopic Instruments are substantially equivalent to the Cabot Seitzinger Tripolar Forceps, the Cabot Bipolar Cutting Forceps (K932293 and K946109) and the Storz Bipolar Forceps (K96009). All of these devices perform the coagulation of tissue via bipolar RF energy applied through the electrodes of the devices.
#### IV. Device Description
The LigaSure™ Vessel Sealing Generator is an isolated, microprocessor based, bipolar only electrosurgical generator which incorporates three bipolar modes; standard, macro and vessel sealing. The generator will accept standard bipolar devices. In addition, the generator will also accept dedicated LigaSure™ Open and Laparoscopic Instruments for use in vessel sealing.
The LigaSure™ Open instruments are reusable forceps type devices with "snap-in" single use, disposable electrodes which are placed in the jaws of the devices. The LigaSure™ laparoscopic
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instrument is a sterile, single use device for use in grasping and vessel sealing in laparoscopic procedures. The device outer diameter is 5 mm and the working length is approximately 32 cms.
The system creates vessel ligation by the application of bipolar electrosurgical RF energy (coagulation/desiccation) to vessel tissue or vascular bundles interposed between the electrodes of the device.
#### V. Intended Use
The LigaSure™ Vessel Sealing System is intended for use in general, laparoscopic, and gynecologic procedures where ligation of vessels is desired and as an alternative to mechanical claming (clips or staples) or suturing. The generator can also be used with standard bipolar devices where bipolar cutting or coagulation is desired.
Indications for use for this type of ligation include general, laparoscopic and gynecological procedures such as urological, thoracic, plastic and reconstructive, bowel resections, hysterectomies (LAVH and abdominal) cholesystectomics, gall bladder procedures, Nissen fundoplication, adhesiolysis, oophorectomies, etc. The devices can be used on vessels up to 7 mm. and bundles as large as will fit in the jaws of the instruments.
#### VI. Summary of Technological Characteristics
The LigaSure™ Vessel Sealing generator and instruments have the same basic technological characteristics as the predicate devices noted above. The LigaSure™ generator provides bipolar RF energy to bipolar devices for coagulation/desiccation of vessels.
#### VII. Performance Data
Preclinical laboratory (acute and chronic studies) and performance testing were performed to ensure the devices functioned as intended and met design specification. Sufficient data was obtained to show the LigaSure™ Vessel Sealing system was equivalent to or better than the predicate devices and meet safety and effectiveness criteria.
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Image /page/2/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a circular seal with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES • USA" around the perimeter. Inside the circle is a stylized symbol featuring three human profiles merging into a wing-like shape.
Public Health Service
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
AUG 28 1998
Mr. Charles Copperberg Senior Regulatory Affairs Associate ValleyLab.Inc. 5920 Longbow Drive Boulder, Colorado 80301
Re: K981916
Trade Name: Ligasure Vessel Sealing System Regulatory Class: II Product Code: GEI Dated: May 29, 1998 Received: June 1, 1998
Dear Mr. Cooperberg:
We have reviewed your Section 510(k) notification of intent to market the device referenced above and we 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). 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.
If your device is classified (see above) into either class II (Special Controls) or class III (Premarket Approval), 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 895. A substantially equivalent determination assumes compliance with the Current Good Manufacturing Practice requirements, as set forth in the Quality System Regulation (QS) for Medical Devices: General regulation (21 CFR Part 820) and that, through periodic QS inspections, the Food and Drug Administration (FDA) will verify such assumptions. Failure to comply with the GMP regulation may result in regulatory action. In addition, FDA may publish further announcements concerning your device in the Federal Register. Please note: this response to your premarket notification submission does not affect any obligation you might have under sections 531 through 542 of the Act for devices under the Electronic Product Radiation Control provisions, or other Federal laws or regulations.
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### Page 2 - Mr. Charles Copperberg
This letter will allow you to begin marketing your device as described in your 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 809.10 for in vitro diagnostic devices), please contact the Office of Compliance at (301) 594-4595. 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 807.97). Other general information on your responsibilities under the Act may be obtained from the Division of Small Manufacturers 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 and Restorative Devices Office of Device Evaluation Center for Devices and Radiological Health
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Page 1 of 1
#### 510(k) Number (if known): K981916
Device Name:
# Valleylab LigaSure™ Vessel Sealing System
Indications For Use:
The LigaSure™ Vessel Sealing System includes a bipolar electrosurgical generator and dedicated bipolar electrosurgical instruments intended for use in general, laparoscopic and gynecologic procedures where ligation of vessels is desired. The system creates a vessel ligation (seal) by the application of bipolar electrosurgical RF energy (coagulation) to vessels interposed between the jaws of the device.
The generator can also be used with standard bipolar devices where bipolar cutting or coagulation is desired.
The indications for use include general, (including urologic, thoracic, plastic and reconstructive), laparoscopic and gynecological procedures where ligation of vessels is performed including such procedures as bowel resections, hysterectomies (both vaginal and abdominal), laparoscopic cholesystectomies, laparoscopically assisted vaginal hysterectomies, gall bladder procedures, Nissen fundoplication, adhesiolysis, oophorectomy, etc. The devices can be used on vessels up to 7 mm. and bundles as large as will fit in the jaws of the instruments.
(PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
| Prescription Use (Per 2.1 CFR 801.109) | <div style="display:inline-block; vertical-align:top;">X</div> | OR | Over-The-Counter Use |
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(Division Sign-Off)
Division of General Restorative Devices
| 510(k) Number | K981916 Page 21 of 21 |
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: 上一
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.