DISPOSABLE CIRCULAR STAPLER, DISPOSABLE CIRCULAR STAPLER MODEL KYGW-25.5, KYGW-28.5
K100723 · Changzhou Kangdi Medical Stapler Co., Ltd. · GDW · Apr 30, 2010 · General, Plastic Surgery
Device Facts
Record ID
K100723
Device Name
DISPOSABLE CIRCULAR STAPLER, DISPOSABLE CIRCULAR STAPLER MODEL KYGW-25.5, KYGW-28.5
Applicant
Changzhou Kangdi Medical Stapler Co., Ltd.
Product Code
GDW · General, Plastic Surgery
Decision Date
Apr 30, 2010
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 878.4750
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
The Disposable Circular Stapler has application throughout the alimentary tract for end-to-end, end-to-side and side-to-side anastomoses.
Device Story
Disposable circular stapler; manually operated surgical instrument. Preloaded with two staggered rows of titanium staples; includes circular knife blade. Operation: trigger handle squeeze deploys staples and cuts excess tissue to create circular anastomosis. Used in clinical settings for alimentary tract procedures. Benefits: facilitates tissue joining and resection during surgery.
Clinical Evidence
Bench testing only. Biocompatibility testing (cytotoxicity, sensitization, irritation, acute systemic toxicity) performed. Performance testing included tensile seal strength, package verification, vacuum leak, impermeability fusion, agar contact-attack, and accelerated aging tests. Results demonstrate device meets performance standards for implanted titanium and package integrity.
Technological Characteristics
Materials: ISO 5832-2 unalloyed titanium staples, stainless steel knife, polymeric components. Manual operation; no internal power or software. Dimensions: 25.5mm and 28.5mm models. Sterilization: Irradiation. Packaging: Blister tray with Tyvek lid.
Indications for Use
Indicated for patients requiring end-to-end, end-to-side, or side-to-side anastomoses throughout the alimentary tract.
Regulatory Classification
Identification
An implantable staple is a staple-like device intended to connect internal tissues to aid healing. It is not absorbable.
Predicate Devices
Endopath ILS Endoscopic Circular Stapler 25mm, 29mm (K920752)
Submission Summary (Full Text)
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K100723 Page 1/6
## 510(k) Summary
This summary of 510(k) safety and effectiveness information is being submitted in accordance with requirements of 21 CFR Part 807.92.
Date: October 17, 2009
APR 3 0 2010
1. Company and Correspondent making the submission:
Name - Changzhou Kangdi Medical Stapler Co., Ltd.
Address - No.16, Kunlun Road, Xinbei Zone,
Changzhou Jiangsu, China 213022
Telephone — +86-519-85162780
Fax - +86-519-85139853
Contact - Fleming Jiang, Quality Manager
Email - jiangmingfang@kanghui-china.com
2. Device :
Trade/proprietary name: Disposable Circular stapler
Common Name
Classification Name : Staple, implantable
Predicate Devices:
| Manufacturer | Device Name | 510(k) Number |
|--------------------------------|-----------------------------------------------------------|---------------|
| Ethicon Endo-<br>Surgery, Inc. | Endopath ILS Endoscopic<br>Circular Stapler<br>25mm, 29mm | K920752 |
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- 3. Classifications Names & Citations :
21CFR 878.4750, GDW, Implantable Staple
- 4. Description :
- 4.1 General
The disposable circular stapler is preloaded with two staggered rows of titanium staples in both inner and outer circles. After the deploying of the instrument, the circular knife blade inside the instrument can cut off excess tissue automatically to create a circular anastomosis. The instrument is fired by squeezing the trigger handle firmly as far as it will go. The size of the anastomosis site is determined by the diameter of the selected circular knife blade.
- 5. Indication for use :
The Disposable Circular Stapler has application throughout the alimentary tract for end-to-end, end-to-side and side-to-side anastomoses.
- 6. Comparison with predicate device: Please see next page for the comparison table.
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| Features & Description | Changzhou Kangdi Medical Stapler Co., Ltd Disposable Circular Stapler (DCS) 25.5mm, 28.5mm | Predicate |
|-----------------------------|--------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------|
| Name | Changzhou Kangdi Medical Stapler Co., Ltd Disposable Circular Stapler KYGW-25.5, KYGW-28.5 | Ethicon Endo-Surgery, Inc. Endopath ILS Endoscopic Circular Stapler 25mm, 29mm |
| Manufacturer of Record | Changzhou Kangdi Medical Stapler Co., Ltd | Ethicon Endo-Surgery, Inc. |
| Contract Manufacturer | Changzhou Kangdi Medical Stapler Co., Ltd | Ethicon Endo-Surgery, Inc |
| 510(k) Clearance Numbers | Subject of this Notification | K920752 |
| Intended use | Applications throughout the alimentary Tract for end-to-end, end-to-side and Side-to-side anastomoses. | Applications throughout the alimentary Tract for end-to-end, end-to-side and Side-to-side anastomoses. |
| Contraindications | Same, refer to labeling | Same, refer to labeling |
| FDA Class (System) | Class II | Class II |
| Sizes | 25.5mm, 28.5mm Circular Staplers | 25mm, 29mm Circular Staplers |
| Staple Shape | B-Shaped | B-Shaped |
| Features & Description | Changzhou Kangdi Medical Stapler Co.,Ltd<br>Disposable Circular Stapler<br>25.5mm, 28.5mm | Predicate<br>Ethicon Endo-Surgery, Inc.<br>Endopath ILS Endoscopic Circular Stapler<br>25mm, 29mm |
| Closed Staple Height | 1.5mm-2.0mm | 1.0mm-2.5mm |
| Staple Material | ISO 5832-2: Implants for surgery - Metallic<br>materials - Part 2: Unalloyed Titanium | ISO 5832-2: Implants for surgery - Metallic<br>materials - Part 2: Unalloyed Titanium |
| Knife Material | Stainless steel | Stainless steel |
| Stapler Material | Polymeric materials, surgical grade stainless steels<br>and lubricants | Polymeric materials, surgical grade stainless<br>steels, adhesives, and lubricants |
| Cutting Mechanism | Circular Knife | Circular Knife |
| DCS Internal Power | None | None |
| Power | Manually powered | Manually powered |
| Energy to bend Staple | 17.5 N | Similar |
| Software containing | No | No |
| Digital Information | None | None |
| How Supplied | Sterile-Single Patient Use | Sterile-Single Patient Use |
| Features & Description | Changzhou Kangdi Medical Stapler Co.,Ltd<br>Disposable Circular Stapler<br>25.5mm, 28.5mm | Predicate<br>Ethicon Endo-Surgery, Inc.<br>Endopath ILS Endoscopic Circular Stapler<br>25mm, 29mm |
| Safety Mechanism | Contains indicators for appropriate<br>Range for desired closed staple height,<br>but can be deployed out of range | Contains indicators for appropriate<br>Range for desired closed staple height,<br>but can be deployed out of range |
| Staples per Clip | 20 for 25.5; 24 for 28.5 | 20 for 25mm; 24 for 29mm |
| Energy to Remove | 2.8-4.3 N | Same |
| Accuracy of B bend per clip | 100% | 100% |
| Insertion Mechanism | Rigid | Rigid |
| Method of Sterilization | Irradiation | Irradiation |
| Packaging | Blister Tray with Tyvek Lid | Blister Tray with Tyvek Lid |
.
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- 7. Performance Testing Section:
In order to establish substantial equivalence to the identified predicate device's) we performed the following tests: for biocompatibility we performed cytotoxicity, sensitization, irritation and acute systemic toxicity testing and the results of the testing provided evidence that the device was biocompatible. For assessment of device performance characteristics we assured that the device met all performance standards for implanted titanium and for package integrity and shelf life assessments following sterilization we assessed the results of the Tensile Seal Strength Test, Package Verification Test, Vacuum Leak Test, Impermeability Fusion Test, Agar Contact-Attack Test and Accelerated Aging Testing. The results of all of these tests provided evidence that the subject device was substantially equivalent to the predicate device.
### 8. Conclusions:
In accordance with the Federal Food, Drug and Cosmetic Act, 21 CFR Part 807 and based on the information provided in this premarket notification Changzhou Kangdi Medical Stapler Co., Ltd. concludes that , models KYGW-25.5 and KYGW-28.5 is substantially equivalent to predicate devices as described herein.
- 9. Changzhou Kangdi Medical Stapler Co., Ltd. will update and include in a summary any other information deemed seasonably necessary by the FDA.
END
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Image /page/6/Picture/0 description: The image shows the logo for the Department of Health & Human Services USA. 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 an eagle with its wings spread, symbolizing the department's mission to protect the health of all Americans.
#### DEPARTMENT OF HEALTH & HUMAN SERVICES
Food and Drug Administration 10903 New Hampshire Avenue Document Control Room -WO66-G609 Silver Spring, MD 20993-0002
Changzhou Kangdi Medical Stapler Co., Ltd. % International Regulatory Consultants, LLC Mr. Charlie Mack 77325 Joyce Way Echo, Oregon, 97826
APR 30 2010
Re: K100723
Trade/Device Name: Disposable Circular Stapler Regulation Number: 21 CFR 878.4750 Regulation Name: Implantable staple Regulatory Class: II Product Code: GDW Dated: March 7, 2010 Received: March 15, 2010
Dear Mr. Mack:
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, 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 (reporting of medical device-related adverse events) (21 CFR 803); good manufacturing practice requirements as set
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Page 2 - Mr. Charlie Mack
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.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please go to http://www.fda.gov/AboutFDA/CentersOffices/CDRH/CDRHOffices/ucm115809.htm for the Center for Devices and Radiological Health's (CDRH's) Office of Compliance. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to
http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm for the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance.
You may obtain other general information on your responsibilities under the Act from the Division of Small Manufacturers, International and Consumer Assistance at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address http://www.fda.gov/MedicalDevices/Resourcesfor You/Industry/default.htm.
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm.
Sincerely yours,
Mark N. Melkerson
Mark N. Melkerson Director Division of Surgical, Orthopedic and Restorative Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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#### Indications for Use
# Indications for Use
510(k) Number (if known):
Device Name: Disposable Circular Stapler, Models KYGW-25..5 and KYGW-28.5
Indications for Use:
The Disposable Circular Stapler has application throughout the alimentary tract for endto-end, end-to-side and side-to-side anastomoses.
Prescription Use イ AND/OR (Part 21 CFR 801 Subpart D)
Over-The-Counter Use (21 CFR 801 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE OF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Daniel Krane for MXM
(Division Sign-Off)
Division
Division of Surgical, Orthopedic, and Restorative Devices
510(k) Number K100773
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.