510(k) · Cleared
Cleared40-42mm BiPolar Head and 22mm Femoral Head
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Signature Orthopaedics Pty, Ltd. · KWY Prosthesis, Hip, Hemi-, Femoral, Metal/Polymer, Cemented Or Uncemented
Cleared on Jan 29, 2018 after a 452-day review. The summary cites 2 numbers, none of which could be confirmed as its predicate (see the table below). 1 later device descends from it.
- Decided
- Jan 29, 2018
- Review
- 452 days
- Class
- Class II
- Product code
- KWY
- Recalls
- None
- Predicates
- 2
1 later device descends from it, 1 citing it directly.
- This deviceK163081 40-42mm BiPolar Head and 22mm Femoral HeadSignature Orthopaedics Pty, Ltd. · 2018
- Descendant · cites it directly · 0 of its ownK191708 Origin Stem, Evolve Stem, Aria Hip Stem, Remedy Stem, CoCr Femoral…Signature Orthopaedics Pty, Ltd. · 2020
Most influential descendants
Showing 1 of 1 · See all- K191708Origin Stem, Evolve Stem, Aria Hip Stem, Remedy Stem, CoCr Femoral HeadSignature Orthopaedics Pty, Ltd. · 2020 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| 0 (this device) | K163081 | 40-42mm BiPolar Head and 22mm Femoral Head | Signature Orthopaedics Pty, Ltd. | 2018 | — |
| +1 | K191708 | Origin Stem, Evolve Stem, Aria Hip Stem, Remedy Stem, CoCr Femoral Head | Signature Orthopaedics Pty, Ltd. | 2020 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2020 | 1 | 0 |
Sources: FDA 510(k) database (decision fields), the FDA summary (predicates and indications), FDA recall and enforcement reports, and MAUDE; processed by 510(k) Report. Verify on FDA.gov · Methodology and accuracy.
Planning a device in KWY? A 510(k) Report weighs predicate choices, recall history and review times for a new device like this one.
Top candidate predicates for a new KWY device
- #1 K253357 b-ONE® Bipolar Headscore 11.2 · 1 generation · no Class I recall
- #2 Held for the reportin the report
- #3 Held for the reportin the report
What was it cleared against? (2)
Devices the submitter claimed this one is substantially equivalent to (*), and reference devices cited for a specific test or feature (†), as written in the FDA summary; numbers the summary cites that cannot be its predicate are marked – and kept off the family tree.
| Type | Number | Device | Decided |
|---|---|---|---|
| Kept off the family tree | K100002 | Signature Orthopaedics Bipolar Head Not matched in our reading of the summary (scans can blur digits), so it is kept off the family tree | |
| Kept off the family tree | K121210 | Signature Orthopaedics Femoral Head Not matched in our reading of the summary (scans can blur digits), so it is kept off the family tree | |
| † | K081673 | Dyn-Alif Anterolateral Intervertebral Body Fusion Device | 2008 |
| † | K071073 | Solar 8000 and Transport Pro with Patient Data Module | 2007 |
| † | K060605 | Signature Orthopaedics Bipolar Head |
What descends from it? (1)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K191708 | Origin Stem, Evolve Stem, Aria Hip Stem, Remedy Stem, CoCr Femoral Head | 2020 | 0 |
Has anything in its family been recalled? (0 Class I)
No FDA recall names this device.
No ancestor or descendant has a Class I recall.
What does this lineage say?
- Of its descendants, K191708 (Signature Orthopaedics Pty, Ltd., 2020) has gone furthest, with 0 descendants of its own.
How does its category compare?
All KWY devicesKWY Prosthesis, Hip, Hemi-, Femoral, Metal/Polymer, Cemented Or Uncemented: FDA decisions, review times, recalls and adverse event reports over 20 years. 2018, this device’s year, is highlighted.
FDA decisions per year · KWY
1in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · KWY
126in 2019
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · KWY
2in 2025
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · KWY
180in 2025
MAUDE reports naming product code KWY, not matched to any one device; reports are not rates.
View these four charts as a table
| Year | Decisions | Median 510(k) review, days | Recalls (Class I) | MAUDE reports |
|---|---|---|---|---|
| 2007 | 0 | — | 25 | 370 |
| 2008 | 3 | 123 | 0 | 900 |
| 2009 | 1 | — | 24 | 961 |
| 2010 | 4 | 187 | 1 | 688 |
| 2011 | 1 | — | 0 | 758 |
| 2012 | 1 | — | 1 | 978 |
| 2013 | 2 | — | 2 | 1,148 |
| 2014 | 1 | — | 0 | 1,055 |
| 2015 | 1 | — | 0 | 1,213 |
| 2016 | 1 | — | 3 | 877 |
| 2017 | 1 | — | 2 | 826 |
| 2018 | 3 | 219 | 1 | 1,380 |
| 2019 | 5 | 126 | 1 | 1,530 |
| 2020 | 1 | — | 0 | 1,259 |
| 2021 | 0 | — | 0 | 276 |
| 2022 | 2 | — | 0 | 208 |
| 2023 | 2 | — | 0 | 178 |
| 2024 | 0 | — | 1 | 209 |
| 2025 | 1 | — | 2 | 180 |
| 2026 | 1 | — | 0 | — |
What is it indicated for?
Signature Orthopaedics’ Evolve UniPolar Head and BiPolar Head are intended for hemihip arthroplasty only, where the natural acetabulum does not require replacement. The Evolve UniPolar Head and BiPolar Head are indicated for bone fractures or pathologies involving only the femoral head/neck and/or proximal femur, such as:
• Acute femoral head or neck fracture
• Fracture dislocation of the hip
• Avascular necrosis of the femoral head
• Non-union of femoral neck fractures
• Certain high subcapital and femoral neck fractures in the elderly
• Degenerative arthritis involving only the femoral head
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K163081 · printed Nov 6, 2026
Cite this page
510(k) Report. “K163081: 40-42mm BiPolar Head and 22mm Femoral Head.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K163081
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Record history
- FDA decision record loaded May 2, 2026
- Summary read Oct 13, 2026 (extraction version 9eaa42aa01ed)
- Lineage and recalls computed Nov 3, 2026
- Page last updated Nov 3, 2026