ABSORBABLE SURGICAL GUT SUTURE, PLAIN AND CHRONIC AND SOFTCAT ABSORBABLE SURGICAL GUT SUTURE, PLAIN AND CHRONIC
K991223 · Aesculap, Inc. · GAL · Apr 30, 1999 · General, Plastic Surgery
Device Facts
Record ID
K991223
Device Name
ABSORBABLE SURGICAL GUT SUTURE, PLAIN AND CHRONIC AND SOFTCAT ABSORBABLE SURGICAL GUT SUTURE, PLAIN AND CHRONIC
Applicant
Aesculap, Inc.
Product Code
GAL · General, Plastic Surgery
Decision Date
Apr 30, 1999
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 878.4830
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
AESCULAP® Absorbable Surgical Gut Sutures and Softcat® Absorbable Surgical Gut Sutures are indicated for use in all types of gencral soft tissue approximation and/or ligation, including ophthalmic procedures, but not for use in cardiovascular or neural tissue.
Device Story
Absorbable, flexible suture thread; manufactured from bovine serosa or ovine submucosa. Available in plain or chromicized forms; Softcat® variants treated with glycerol to enhance handling and prevent spruing. Supplied sterile with or without needles. Used by surgeons for soft tissue approximation and ligation. Operates as a mechanical support for tissue healing; chromic treatment and cross-linking increase resistance to in vivo degradation, prolonging tensile strength. Clinical benefit includes secure tissue approximation during healing process.
Clinical Evidence
No clinical data. Substantial equivalence demonstrated via non-clinical testing, including U.S.P. physical property conformance, in vitro and in vivo biosafety studies, animal implant studies (tensile strength and mass loss rates), and shelf life/sterilization validation.
Technological Characteristics
Absorbable suture thread; bovine serosa or ovine submucosa. Plain or chromicized (cross-linked). Softcat® treated with glycerol. Sizes 6-0 to 4. Conforms to U.S.P. XXIII monographs <871> (needle attachment) and <881> (tensile strength). Sterile.
Indications for Use
Indicated for general soft tissue approximation and/or ligation, including ophthalmic procedures. Contraindicated for cardiovascular or neural tissue. Prescription use only.
Regulatory Classification
Identification
An absorbable surgical gut suture, both plain and chromic, is an absorbable, sterile, flexible thread prepared from either the serosal connective tissue layer of beef (bovine) or the submucosal fibrous tissue of sheep (ovine) intestine, and is intended for use in soft tissue approximation.
Special Controls
*Classification.* Class II (special controls). The special control for this device is FDA's “Class II Special Controls Guidance Document: Surgical Sutures; Guidance for Industry and FDA.” See § 878.1(e) for the availability of this guidance document.
Predicate Devices
Plain and Chromic Absorbable Surgical Suture (Davis & Geck)
Plain and Chromic Absorbable Surgical Suture (Ethicon, Inc.)
SOFTGUT® Plain and Chromic Absorbable Surgical Suture (Davis & Geck)
SURGIGUT® Plain and Chromic Absorbable Surgical Gut Suture (U.S. Surgical Corporation)
Submission Summary (Full Text)
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4/30/95
AESCULAP®
K991223
## VII. 510(k) Summary
In accordance with the Safe Medical Devices Act (SMDA) of 1990 and Title 21 of the Code of Federal Regulations Part 807 (21 CFR §807), and in particular §807.92, the following summary of safety and effectiveness information is provided:
## A . Submitted By
AESCULAP® 1000 Gateway Boulevard South San Francisco, California 94080-7030 Telephone: (415) 876-7000 Contact: Victoria Mackinnon, Director of Regulatory Affairs & Quality Assurance Date Prepared: April 6, 1999
# B . Device Name
| Trade or Proprietary Name: | Absorbable Surgical Gut Suture, plain and<br>chromic; Softcat® Absorbable Surgical Gut<br>Suture, plain and chromic |
|----------------------------|---------------------------------------------------------------------------------------------------------------------|
| Common or Usual Name: | Absorbable Surgical Gut Suture, plain and<br>chromic |
| Classification Name: | Absorbable Surgical Gut Suture |
## C. Predicate Devices
The subject device is substantially equivalent to the following predicate devices:
- Plain and Chromic Absorbable Surgical Suture (Davis & Geck)) .
- Plain and Chromic Absorbable Surgical Suture (Ethicon, Inc.) .
- . SOFTGUT® Plain and Chromic Absorbable Surgical Suture (Davis & Geck)
- SURGIGUT® Plain and Chromic Absorbable Surgical Gut Suture (U.S. . Surgical Corporation)
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#### D. Device Description
The subject device is an absorbable, flexible suture thread, available in both plain and chromicized forms, which is supplied sterile. It is manufactured from the serosal connective tissue layer of bovine intestine or the submucosal layer of ovine intestine. It is indicated for general soft tissue approximation and/or ligation, including ophthalmic tissues, but not including cardiovascular or neural tissues. It is undyed, and is available with and without needles attached. In the Softcar® form, both plain and chromic sutures are treated with glycerol.
## E. Intended Use
AESCULAP® Absorbable Surgical Gut Sutures and Softcar® Absorbable Surgical Gut Sutures are indicated for use in all types of gencral soft tissue approximation and/or ligation, including ophthalmic procedures, but not for use in cardiovascular or neural tissue.
### F. Comparison to Predicate Devices
The subject Absorbable Surgical Gut Suture is composed of processed strands of bovine serosa or ovine submucosa, materials equivalent, if not identical, to those comprising the predicate sutures. The subject device is offered both plain, and chromicized to prolona its in vivo strength retention. In addition, the Softcar® plain and chromic forms of the subject device have been treated with a glycerol solution to enhance handling properties, in the same fashion as the predicate Davis & Geck SOFTGUT® suture.
The subject device has the same design as do the Ethicon and Davis & Geck predicate devices, being a sterile, flexible thread available in sizes 6-0 (1 Metric) through 4 (8 Metric), being offered with or without one of a selection of standard needles attached, and conforming in all respects to the requirements of the Official Monograph for Absorbable Surgical Suture in U.S.P. XXIII, including <& 1> Sutures -- Diameter, <871> Sutures -- Needle Attachment, and <881> Tensile Strength. .
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As is also the case with the predicate devices, the sutures are offered either plain, or treated with a chromic salt and cross-linked to increase resistance to degradation in vivo, thereby prolonging tensile strength retention. Both plain and chromic sutures are offered in traditional packaging containing an alcohol solution to prevent spruing caused by drying during storage.
Alternatively, as is the case with the predicate Davis & Geck SOFTGUT® sutures, Softcat® plain and chromic sutures are treated with a glycerol solution before packaging to prevent spruing and to preserve handling properties.
Physical properties of the subject device are substantially equivalent to those of the Ethicon and Davis & Geck predicate devices, including fiber diameter, knot pull tensile strength, straight pull tensile strength, flexibility, knot security, and needle attachment strength, among others.
The subject device is manufactured in a manner typical of the industry, and equivalent to that used to produce predicate devices, wherein bovine serosa or ovine submucosa are harvested from healthy animals, cut into long strips which are cleaned mechanically and chemically to remove non-collagenous materials, twisted together to form monfilament-like strands, dried, polished to uniform diameter, cut to length, and attached to needles to make finished sutures. A series of chromicizing and cross-linking baths are added to the process to make chromic sutures, and both plain and chromic sutures are either packaged in an alcohol solution to prevent fiber drying during storage, or treated with a glycerol solution to condition the fibers before packaging. Given that the subject device is made from the same materials, and in essentially the same fashion, as the Ethicon and Davis & Geck predicate devices, the subject device can be expected to have the same or equivalent chemical characteristics, physical properties, biocompatibility, and in vivo performance properties as do the predicate devices.
The subject device is packaged and sterilized in the same or equivalent manner, and has the same or equivalent labeling claims as do the predicate devices, including indications, contraindications, warnings, cautions and precautions.
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# G . Summary of Non-Clinical Tests
Non-clinical testing conducted on the subject device to demonstrate its substantial cquivalence to predicate devices included testing of physical properties to prove conformance to the requirements of U.S.P., in vitro and in vivo biosafety studies, implant studies in animals to demonstrate rates of tensile strength and mass loss, and shelf life and sterilization validation studies.
# H . Summary of Clinical Tests
(Not applicable)
# I. Conclusions of Non-Clinical and Clinical Tests
The results of all testing demonstrated the substantial equivalence, if not superiority, of the subject device to one or more predicate devices.
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Image /page/4/Picture/1 description: The image shows the logo for the U.S. Department of Health and Human Services. The logo consists of a circular seal with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the perimeter. Inside the circle is a stylized image of three birds in flight, depicted with curved lines to suggest movement and freedom.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
APR 3 0 1999
AESCULAP c/o Mr. Steve Reitzler, RAC 13221 Maricotte Place San Diego, California 92130
Re: K991223
Trade Name: Absorbable Surgical Gut Suture, and SOFTCAT® Absorbable Surgical Suture
Regulatory Class: II Product Code: GAL Dated: April 6, 1999 Received: April 12, 1999
Dear Mr. Reitzler:
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 devices that were regulated as transitional devices and that have been reclassified into class II. Notice of this reclassification was published in the Federal Register on Monday, December 11, 1989 (Vol. 54, No. 236, Pages 50737 and 50738). A copy of this Federal Register can be obtained by calling the Division of Small Manufacturers Assistance (DSMA) at (800) 638-2041 or (301) 443-6597. You may, therefore, market the device subject to the general controls provisions of the Federal Food, Drug, and Cosmetic Act (Act) and the following limitations:
- The Absorbable Surgical Gut Suture and SOFTCAT® Absorbable Surgical Suture is 1. indicated for use in general soft tissue approximation and/or ligation, including use in ophthalmic procedures, but not for use in cardiovascular and neurological procedures.
- 2. This device may not be manufactured from any material other than serosal connective tissue layer of beef (bovine) or the submucosal fibrous tissue of sheep (ovine) intestine. In addition, you must maintain documentation at your premises regarding vendor certification for raw or semiprocessed source material, all manufacturing and quality control release procedures, and validation of sterilization procedures used in the manufacturing of the Absorbable Surgical Gut Suture and SOFTCAT® Absorbable Surgical Suture. Any deviation of the polymer composition or processing as described in this 510(k) notification must be submitted to FDA in a new premarket notification at least 90 days prior to implementation of the proposed change(s).
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Page 2 - Mr. Steve Reitzler
The sale, distribution and use of this device are restricted to prescription use in accordance with 21 CFR 801.109.
The general controls provisions of the Act include requirements for registration, listing of The general controls provisions of the Act include requirements of regioned in the problem in the adulteration.
Existing major regulations affecting your device can be found in the Code of Federal
. Existing major regulations arrecting your avversion and Drug Administration
Regulations, Title 21, Parts 800 to 895. In addition, the Federal Regis Regulations, Title 21, Parts 800 to 893, 111 addition, more ance in the Federal Register.
(FDA) may publish further announcements concerning your device in the Federal any (FDA) may publish further announcements contribution submission does not affect any Please note: this response to your premarker nontrol for Health and Safety Act of 1968, or other Federal Laws or Regulations.
This letter will allow you to begin marketing your device as described in your 510(k)
. In the may and on the collected as a few interceiple on wour dcyice to This letter will allow you to begin malicoling of substantial equivalence of your device to a
premarket notification. The FDA finding of substition for vour device and thus, premarket notification. The FDA finding of substantial equiration of 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)
Carties of the same and since in the income includes contract the Office of If you desire specific advice for your ucvace on on our accessions of the Office of
and additionally 809.10 for in vitro 41 love of excellence the promotion and and additionally 809.10 for in Milly diagnolic de rocs), product on the promotion and Compliance at (301) 594-4392. Aduntonally, NY (405.70mpliance at (301) 594-4595.
advertising of your device, please contact the Office by Compliance to premarket advertising of your device, piease contact the oranding by reference to premarket.
Also, please note the regulation entitled, "Misbranding on your responsibility Also, please note the regulation entitled, "Misoration on your responsibilities under the
notification" (21 CFR 807.97). Other general information on your responsibilities u notification" (21 CFR 807.97). Outler gench internations veers Assistance at its toll-free
Act may be obtained from the Division of Small Manufacturers Act may be obtained none 1701) 443-6597 or at its internet address "http://www.fda.gov/cdrh/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
Enclosure
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#### Draft Labeling v.
# A . Indications for Use
510(k) Number (if known): k991223
Device Name: AESCULAP® Absorbable Surgical Gut Suture
Indications for Use:
Absorbable Surgical Gut Suture is indicated for use in general soft rissue approximation and/or ligation , including use in ophthalmic nssac upproximation and in cardiovascular or neural tissues.
Concurrence of CDRH, Office of Device Evaluation (ODE)
| (Division Sign Off) | |
|-----------------------------------------|---------|
| Division of General Restorative Devices | |
| 510(k) Number | K991223 |
| Prescription Use<br>(Per 21 CFR 801.109) | OR | Over-The-Counter Use ______ |
|------------------------------------------|----|-----------------------------|
|------------------------------------------|----|-----------------------------|
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.