510(k) · Cleared
ClearedHoffman LRF System
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Stryker GmbH · KTT Appliance, Fixation, Nail/Blade/Plate Combination, Multiple Component
Cleared on Nov 15, 2016 as substantially equivalent to K153377 (Stryker GmbH, 2016) after a 144-day review. Its family tree reaches back 6 generations to 2000. 12 later devices descend from it.
- Decided
- Nov 15, 2016
- Review
- 144 days
- Class
- Class II
- Product code
- KTT
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 6 generations to K994143 (2000). 9 ancestors in all. 12 later devices descend from it, 2 citing it directly.
- Root · 6 generations backK994143 Smith & Nephew External Fixation System [Unilateral (Linear) &…Smith & Nephew, Inc. · 2000 · Recalled
- 5 generations backK031181 External Fixation SystemsSmith & Nephew, Inc. · 2003
- 4 generations backK113327 Hoffmann LRF (Limb Reconstruction Frame) SystemStryker Corp. · 2012 · Recalled
- 3 generations backK130334 Hoffmann LRF (Limb Reconstruction Frame System)Stryker Trauma AG · 2013
- 2 generations backK140961 Hoffmann LRF (Limb Reconstruction Frame) SystemStryker Trauma AG · 2014
- 1 generation backK153377 Hoffmann LRF (Limb Reconstruction Frame) SystemStryker GmbH · 2016 · Recalled
- This deviceK161753 Hoffman LRF SystemStryker GmbH · 2016
- Descendant · cites it directly · 11 of its ownK163656 Hoffmann LRF SystemStryker GmbH · 2017 · Recalled
- Descendant · 2 generations on · 10 of its ownK182968 Hoffmann LRF SystemStryker GmbH · 2019
- Descendant · 3 generations on · 8 of its ownK203568 Hoffmann LRF SystemStryker GmbH · 2021
- Descendant · 4 generations on · 5 of its ownK212895 Paragon 28 External Ring Fixation SystemParagon 28, Inc. · 2021
- Descendant · 5 generations on · 3 of its ownK232838 Monkey RingsTM External Fixation SystemParagon 28, Inc. · 2023
Showing 5 of 12 descendants. See all descendants
Descendants cleared per year
Most influential descendants
Showing 5 of 12 · See all- K163656Hoffmann LRF SystemStryker GmbH · 2017 · cites it directly11descendants
- K182968Hoffmann LRF SystemStryker GmbH · 2019 · 2 generations on10descendants
- K203568Hoffmann LRF SystemStryker GmbH · 2021 · 3 generations on8descendants
- K212895Paragon 28 External Ring Fixation SystemParagon 28, Inc. · 2021 · 4 generations on5descendants
- K232838Monkey RingsTM External Fixation SystemParagon 28, Inc. · 2023 · 5 generations on3descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −6 | K994143 | Smith & Nephew External Fixation System [Unilateral (Linear) & Multilateral… | Smith & Nephew, Inc. | 2000 | 19 |
| −5 | K031181 | External Fixation Systems | Smith & Nephew, Inc. | 2003 | — |
| −4 | K113327 | Hoffmann LRF (Limb Reconstruction Frame) System | Stryker Corp. | 2012 | 3 |
| −3 | K130334 | Hoffmann LRF (Limb Reconstruction Frame System) | Stryker Trauma AG | 2013 | — |
| −2 | K140961 | Hoffmann LRF (Limb Reconstruction Frame) System | Stryker Trauma AG | 2014 | — |
| −1 | K153377 | Hoffmann LRF (Limb Reconstruction Frame) System | Stryker GmbH | 2016 | 2 |
| 0 (this device) | K161753 | Hoffman LRF System | Stryker GmbH | 2016 | — |
| +1 | K163656 | Hoffmann LRF System | Stryker GmbH | 2017 | 5 |
| +2 | K182968 | Hoffmann LRF System | Stryker GmbH | 2019 | — |
| +3 | K203568 | Hoffmann LRF System | Stryker GmbH | 2021 | — |
| +4 | K212895 | Paragon 28 External Ring Fixation System | Paragon 28, Inc. | 2021 | — |
| +5 | K232838 | Monkey RingsTM External Fixation System | Paragon 28, Inc. | 2023 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2000 | 1 | 0 |
| 2004 | 1 | 0 |
| 2013 | 1 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2017 | 1 | 0 |
| 2019 | 1 | 0 |
| 2020 | 1 | 0 |
| 2021 | 2 | 0 |
| 2023 | 2 | 0 |
| 2025 | 4 | 0 |
| 2026 | 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 KTT? 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 KTT device
- #1 K242861 TrueLok Elevatescore 21.3 · 14 generations · no Class I recall
- #2 Held for the reportin the report
- #3 Held for the reportin the report
What was it cleared against? (1)
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.
| Type | Number | Device | Decided |
|---|---|---|---|
| * | K153377 | Hoffmann LRF (Limb Reconstruction Frame) SystemSummary page 4…accessories (21 CFR § 888.3030) Regulatory Class: Class II Product Code: KTT Primary Predicate: Hoffmann LRF System, K153377 Device Description: The Hoffmann LRF System is a modular, ring-based, external fixation system designed to address certain orth… | 2016 |
What descends from it? (12)
See all 122 later devices cite it directly; ranked here by how many devices descend from each in turn.
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?
- The line of descent spans 16 years and passes through 4 companies; a new generation was cleared every 1.5 years on median.
- 4 of the 9 ancestors have a recall of any class.
- Of its descendants, K163656 (Stryker GmbH, 2017) has gone furthest, with 11 descendants of its own.
How does its category compare?
All KTT devicesKTT Appliance, Fixation, Nail/Blade/Plate Combination, Multiple Component: FDA decisions, review times, recalls and adverse event reports over 20 years. 2016, this device’s year, is highlighted.
FDA decisions per year · KTT
10in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · KTT
88in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · KTT
2in 2021
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · KTT
673in 2025
MAUDE reports naming product code KTT, 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 | 9 | 55 | 2 | 45 |
| 2008 | 11 | 73 | 1 | 66 |
| 2009 | 11 | 94 | 2 | 45 |
| 2010 | 12 | 148 | 1 | 121 |
| 2011 | 10 | 157 | 0 | 196 |
| 2012 | 9 | 140 | 4 | 527 |
| 2013 | 7 | 87 | 7 | 898 |
| 2014 | 14 | 129 | 0 | 445 |
| 2015 | 12 | 60 | 0 | 401 |
| 2016 | 10 | 142 | 0 | 400 |
| 2017 | 11 | 184 | 1 | 485 |
| 2018 | 6 | 149 | 14 | 597 |
| 2019 | 8 | 110 | 3 | 800 |
| 2020 | 9 | 200 | 0 | 942 |
| 2021 | 10 | 83 | 2 | 961 |
| 2022 | 3 | 25 | 0 | 627 |
| 2023 | 7 | 29 | 0 | 554 |
| 2024 | 5 | 90 | 0 | 523 |
| 2025 | 10 | 88 | 0 | 673 |
| 2026 | 5 | 68 | 11 | — |
What is it indicated for?
The Stryker Hoffmann LRF System is indicated in pediatric patients and adults for the treatment and fixation of: • Open and Closed Fractures • Post-traumatic joint contracture which has resulted in loss of range of motion • Fractures and disease which generally may result in joint contractures or loss of range of motion and fractures requiring distraction • Pseudoarthrosis or non-union of long bones • Limb lengthening by epiphyseal, diaphyseal, or…
Read the full statement (146 words)
The Stryker Hoffmann LRF System is indicated in pediatric patients and adults for the treatment and fixation of:
• Open and Closed Fractures
• Post-traumatic joint contracture which has resulted in loss of range of motion
• Fractures and disease which generally may result in joint contractures or loss of range of motion and fractures requiring distraction
• Pseudoarthrosis or non-union of long bones
• Limb lengthening by epiphyseal, diaphyseal, or metaphyseal distraction
• Correction of bony or soft tissue deformity
• Correction of segmental bony or soft tissue defects
• Joint arthrodesis
• Management of comminuted intra-articular fractures of the distal radius
• Bone transport
The Hoffmann LRF System is indicated in adults for:
• Osteotomy
• Revision procedure where other treatments or devices have been unsuccessful
• Bone reconstruction procedures
• Fusions and replantations of the foot
• Charcot foot reconstruction
• Lisfranc dislocations
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K161753 · printed Nov 6, 2026
Cite this page
510(k) Report. “K161753: Hoffman LRF System.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K161753
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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