AFFINITY - Variable Angle Distal Radius System is indicated for the fixation of simple and complex intra-articular and extra-articular fractures, and for osteotomies of the distal radius in adults. The device is indicated for fixation of Fractures AO types A2, A3, B1, B3, C1, C2, C3.
Device Story
System consists of titanium plates and screws for internal fixation of distal radius fractures and osteotomies. Plates are provided in various configurations (extra-articular, L-plates, T-plates, straight styloid plates) and used with variable angle drilling guides to achieve optimal screw angulation. Intended for use by surgeons in clinical settings. Device is end-user sterilized via steam. Provides mechanical stabilization of bone fragments to facilitate healing.
Clinical Evidence
Bench testing only. Mechanical testing performed per ASTM F384-17 (static/fatigue bend) and ASTM F543-17 (torsion, driving torque, axial pullout). Biocompatibility testing conducted per ISO 10993-5 (cytotoxicity) and ISO 10993-18 (chemical characterization). Sterilization validated per ISO 17665-1 and ISO 11737-2 to SAL 10^-6.
Indicated for adults with simple/complex intra-articular and extra-articular distal radius fractures (AO types A2, A3, B1, B3, C1, C2, C3) and osteotomies.
Regulatory Classification
Identification
Single/multiple component metallic bone fixation appliances and accessories are devices intended to be implanted consisting of one or more metallic components and their metallic fasteners. The devices contain a plate, a nail/plate combination, or a blade/plate combination that are made of alloys, such as cobalt-chromium-molybdenum, stainless steel, and titanium, that are intended to be held in position with fasteners, such as screws and nails, or bolts, nuts, and washers. These devices are used for fixation of fractures of the proximal or distal end of long bones, such as intracapsular, intertrochanteric, intercervical, supracondylar, or condylar fractures of the femur; for fusion of a joint; or for surgical procedures that involve cutting a bone. The devices may be implanted or attached through the skin so that a pulling force (traction) may be applied to the skeletal system.
Predicate Devices
VariAx Distal Radius Plating System, VariAx 2 System (K162841)
Reference Devices
Distal Volar Radius Anatomical plate system (K050932)
Submission Summary (Full Text)
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September 16, 2019
Image /page/0/Picture/1 description: The image shows the logo of the U.S. Food and Drug Administration (FDA). On the left is the Department of Health & Human Services logo. To the right of that is the FDA logo, which is a blue square with the letters "FDA" in white. To the right of the blue square is the text "U.S. FOOD & DRUG ADMINISTRATION" in blue.
Industrias Medicas Sampedro S.A.S Liliana Zuluaga-Idarraga Technical Director Carrera 47 No. 100 Sur 40 La Estrella, 055468 CO
Re: K191641
Trade/Device Name: AFFINITY - Variable Angle Distal Radius System, AFFINITY - Variable Angle Distal Radius Plates, AFFINITY - Variable Angle Distal Radius Screws Regulation Number: 21 CFR 888.3030 Regulation Name: Single/Multiple Component Metallic Bone Fixation Appliances And Accessories Regulatory Class: Class II Product Code: HRS, HWC Dated: June 14, 2019 Received: June 19, 2019
Dear Liliana Zuluaga-Idarraga:
We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. Although this letter refers to your product as a device, please be aware that some cleared products may instead be combination products. The 510(k) Premarket Notification Database located at https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfpmn/pmn.cfm identifies combination product submissions. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you, however, that device labeling must be truthful and not misleading.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.
Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal
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statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801); medical device reporting of medical device-related adverse events) (21 CFR 803) for devices or postmarketing safety reporting (21 CFR 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safety-reportingcombination-products); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to https://www.fda.gov/medical-device-safety/medical-device-reportingmdr-how-report-medical-device-problems.
For comprehensive regulatory information about medical devices and radiation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/medicaldevices/device-advice-comprehensive-regulatory-assistance) and CDRH Learn (https://www.fda.gov/training-and-continuing-education/cdrh-learn). Additionally, you may contact the Division of Industry and Consumer Education (DICE) to ask a question about a specific regulatory topic. See the DICE website (https://www.fda.gov/medical-device-advice-comprehensive-regulatoryassistance/contact-us-division-industry-and-consumer-education-dice) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
Sincerely,
Shumaya Ali. MPH Assistant Director DHT6C: Division of Restorative, Repair and Trauma Devices OHT6: Office of Orthopedic Devices Office of Product Evaluation and Quality Center for Devices and Radiological Health
Enclosure
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# Indications for Use
510(k) Number (if known) K191641
Device Name
AFFINITY - Variable Angle Distal Radius System
Indications for Use (Describe)
AFFINITY - Variable Angle Distal Radius System is indicated for the fixation of simple and complex intra- articular and extra-articular fractures, and for osteotomies of the distal radius in adults.
The device is indicated for fixation of Fractures AO types A2, A3, B1, B3, C1, C2, C3.
| Type of Use (Select one or both, as applicable) | |
|--------------------------------------------------------------------------|--|
| <div> <span>☑ Prescription Use (Part 21 CFR 801 Subpart D)</span> </div> | |
| <div> <span>☐ Over-The-Counter Use (21 CFR 801 Subpart C)</span> </div> | |
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#### 510(k) Summary
The following section is included as required by the Safe Medical Devices Act (SMDA) of 1990 and 21CFR 807.92.
### Submission date
Date of the Traditional 510(k) submission is 28th August 2019.
# Submitter information
| Company name | Industrias Médicas Sampedro S.A.S |
|-----------------------------------|-----------------------------------|
| Establishment registration number | N/A |
| Street Address | Carrera 47 No. 100 Sur 40 |
| City | La Estrella |
| Zip code | 055468 |
| Country | Colombia |
| Phone number | +5743223375 |
| Fax number | +574 338 3013 |
| Principal contact person | Liliana Zuluaga-Idárraga |
| Contact title | Technical Director |
| Contact e-mail address | liliana.zuluaga@imsampedro.com |
| Additional contact person | Daniela Villa-Moreno |
| Contact title | Regulatory Affairs Coordinator |
| Contact e-mail address | daniela.villa@imsampedro.com |
# Submission information
| Trade name | AFFINITY - Variable Angle Distal Radius System |
|------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Common or Usual name | Plate, Fixation, Bone<br>Screw, Fixation, Bone |
| Classification name | 21 CFR 888.3030; Single/multiple component metallic bone<br>fixation appliances and accessories<br>21 CFR 888.3040; Smooth or threaded metallic bone fixation<br>fastener |
| Product code (classification regulation) | HRS<br>HWC |
| Classification Panel | Orthopedic |
| Device class | Class II |
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### Predicate device
The predicate device to which substantial equivalence is claimed to:
| Trade or proprietary or model name | VariAx Distal Radius Plating System, VariAx 2 System |
|------------------------------------|------------------------------------------------------|
| 510(k) number | K162841 |
| Decision date | 02/21/2017 |
| Product code | HRS |
| | HWC |
| Manufacturer | Stryker GmbH |
| Review Panel | Orthopedic |
#### Reference device
Trade or proprietary or model name 510(k) number Decision date Product code Manufacturer Review Panel
Distal Volar Radius Anatomical plate system K050932 04/26/2005 LXT Hand Innovations, Inc Orthopedic
## Device Description
The AFFINITY - Variable Angle Distal Radius System is contains a set of titanium plates and screws that are intended to be end-user sterilized. The AFFINITY - Variable Angle Distal Radius System plates are provided in different configurations and are intended to be used in combination with the variable angle drilling guide and the Styloid hole variable angle drill guide to provide the necessary angulation for optimal screw positioning. The system includes Extra-articular plates (intermediate, wide, and narrow), Distal dorso-ulnar and dorso-radial L-plates, Distal ulnar T-plates, and straight Radius styloid plates.
# Indications for Use
AFFINITY - Variable Angle Distal Radius System is indicated for the fixation of simple and complex intraarticular and extra-articular fractures, and for osteotomies of the distal radius in adults.
The device is indicated for fixation of Fractures AO types A2, A3, B1, B3, C1, C2, C3.
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| Characteristic | Subject device: | Predicate device: | Reference device: Distal Vola |
|----------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------|
| | AFFINITY - Variable Angle<br>Distal Radius System (Plates<br>and Screws) | VariAx Distal Radius Plating<br>System, VariAx 2 System<br>(K162841) | Radius Anatomical plate<br>system (K050932) |
| Product code | HRS, HWC | HRS, HWC | LXT |
| Classification | Class II. 21 CFR 888.3030;<br>Single/multiple<br>component metallic bone<br>fixation appliances and<br>accessories<br>21 CFR 888.3040; Smooth<br>or threaded metallic bone<br>fixation fastener | Class II. 21 CFR 888.3030;<br>Single/multiple component<br>metallic bone fixation<br>appliances and accessories<br>21 CFR 888.3040; Smooth or<br>threaded metallic bone<br>fixation fastener | Class II. 21 CFR 888.3030;<br>Single/multiple<br>component metallic bone<br>fixation appliances and<br>accessories |
| Intended Use | Fixation of simple and complex<br>intra-articular and extra-<br>articular fractures, and for<br>osteotomies of the distal<br>radius in adults. Fractures AO<br>types A2, A3, B1, B3, C1, C2,<br>C3. | VariAx Distal Radius Plating<br>System is intended for internal<br>fixation of small bone fracture,<br>primarily including distal<br>radius fractures. The VariAx 2<br>System is intended for internal<br>fixation. | Distal Volar Radius Anatomical<br>plate system is intended for<br>the fixation of fractures and<br>osteotomies involving the<br>distal radius. |
| Fixation method | Screw | Screw | Screw |
| Material(s) | Plates: biocompatible<br>commercially pure<br>titanium grade 4 (ASTM F67)<br>Screws: biocompatible<br>titanium alloy (Ti6Al4V) (ASTM<br>F136) | Plates: commercially pure<br>titanium grade 2 (ASTM F67)<br>Screws: titanium alloy (ASTM<br>F136) | Plates and Screws:<br>titanium alloy (ASTM F136) |
| Manufacturing | Industrias Médicas Sampedro | Stryker Trauma GmbH | HAND INNOVATIONS, INC |
| Sterilization | Steam Sterilization | Steam Sterilization | Steam Sterilization |
| Patient-specific | NO | NO | NO |
| Patient-specific<br>accessories? | NO | NO | NO |
Comparison to the predicate and reference devices
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# Non-clinical Testing
The following non-clinical testing was conducted as a basis for the determination of substantial equivalence:
| Name | Test method | Conclusion |
|-----------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------|
| Mechanical testing of the plates | ASTM F384-17 (Standard Specifications and Test Methods for Metallic Angled Orthopedic Fracture Fixation Devices)<br><br>Annex 1 Static Bend Testing<br>Annex 2 Fatigue Bend Testing | Substantial equivalence |
| Mechanical testing of the screws | ASTM F543-17 (Standard Specification and Test Methods for Metallic Medical Bone Screws)<br><br>Annex 1 Torsional Properties<br>Annex 2 Driving Torque<br>Annex 3 Axial Pullout | Substantial equivalence |
| Biocompatibility test overview | | |
| Test / assessment description | Test report conclusion | |
| Cytotoxicity:<br>ISO 10993-5: Tests for in-vitro cytotoxicity | no cytotoxic effect | |
| Chemical characterization:<br>ISO 10993-18: Biological Evaluation of Medical Devices - Part 18: Chemical Characterization of Materials. | chemical characterization as per the report | |
| Film-forming contaminations: XPS investigation | appropriate surface cleanliness | |
| Detection and Quantification of Bacterial Endotoxins | no risk of bacterial pyrogenicity | |
| Sterilization test overview | | |
| Test / assessment description | Test report conclusion | |
| Validating steam sterilization method according to ISO 11737-2:2009, ISO 17665-1:2006, ISO 14161:2009. | The results of the validating steam sterilization method show that the implants, accessories, and models can be sterilized to a SAL of 10-6 using the recommended steam sterilization instructions | |
# Conclusion
The non-clinical tests and technological comparisons demonstrate that the subject device is substantially equivalent to the predicate.
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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.
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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?
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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.
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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.
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Reading rule for every project: how many summaries do you read in full?
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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.
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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.
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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.