510(k) · Cleared
Recalled · Class II · 2017Ust-5550-R; Ust-5536-R; L43K
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Hitachi Aloka Medical America, Inc. · ITX Transducer, Ultrasonic, Diagnostic
Cleared on Aug 17, 2016 as substantially equivalent to K111227 (Aloka Co., Ltd., 2011) and 1 other predicate after a 383-day review. Its family tree reaches back 16 generations to 1995. It has been recalled once.
- Decided
- Aug 17, 2016
- Review
- 383 days
- Class
- Class II
- Product code
- ITX
- Recalls
- 1
- Predicates
- 2
Its longest line of descent runs back 16 generations to K935595 (1995). 98 ancestors in all, the oldest K891689 (1989). No later device cites it as a predicate yet.
- Root · 16 generations backK935595 Acuson Model 3001Acuson Corp. · 1995
- 12 generations between
- 3 generations backK121138 Acuson S3000 Diagnostic Ultrasound SystemSiemens Medical Solution · 2012
- 2 generations backK130881 Acuson S2000 and S3000Siemens Medical Solutions USA, Inc. · 2013
- 1 generation backK142368 Noblus Diagnostic Ultrasound ScannerHitachi Aloka Medical, Ltd. · 2015 · Recalled
- This deviceK152126 Ust-5550-R; Ust-5536-R; L43KHitachi Aloka Medical America, Inc. · 2016
Show all 16 generations
- Root · 16 generations backK935595 Acuson Model 3001Acuson Corp. · 1995
- 15 generations backK973767 Harmonic Imaging with ContrastAcuson Corp. · 1997
- 14 generations backK022567 Sequoia Signature II Diagnostic Ultrasound SystemAcuson Corp. · 2002
- 13 generations backK032114 Sequoia 8.0 Diagnostic Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2003
- 12 generations backK041319 Sequoia Diagnostic Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2004
- 11 generations backK042770 Modification to Acuson CV70 Cardiovascular SystemSiemens Medical Solutions USA, Inc. · 2004 · Recalled
- 10 generations backK050240 Modification to Acuson CV70 Cardiovascular SystemSiemens Medical Solutions USA, Inc. · 2005 · Recalled
- 9 generations backK052894 Sonoline G60 S Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2005 · Recalled
- 8 generations backK063138 Modification to Acuson Antares Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2006
- 7 generations backK063803 Acuson Antares Diagnostic Ultrasound SystemSiemens Medical Solutions USA, Inc., Ultrasound DI · 2007 · Recalled
- 6 generations backK072786 Acuson S2000 Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2007
- 5 generations backK081148 Siemens Acuson 2000 Ultrasound System with Abvs TransducerSiemens Medical Solutions USA, Inc., Ultrasound DI · 2008 · Recalled
- 4 generations backK111674 AcusonSiemens Medical Solutions USA, Inc. · 2011 · Recalled
- 3 generations backK121138 Acuson S3000 Diagnostic Ultrasound SystemSiemens Medical Solution · 2012
- 2 generations backK130881 Acuson S2000 and S3000Siemens Medical Solutions USA, Inc. · 2013
- 1 generation backK142368 Noblus Diagnostic Ultrasound ScannerHitachi Aloka Medical, Ltd. · 2015 · Recalled
- This deviceK152126 Ust-5550-R; Ust-5536-R; L43KHitachi Aloka Medical America, Inc. · 2016
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −16 | K935595 | Acuson Model 3001 | Acuson Corp. | 1995 | — |
| −15 | K973767 | Harmonic Imaging with Contrast | Acuson Corp. | 1997 | — |
| −14 | K022567 | Sequoia Signature II Diagnostic Ultrasound System | Acuson Corp. | 2002 | — |
| −13 | K032114 | Sequoia 8.0 Diagnostic Ultrasound System | Siemens Medical Solutions USA, Inc. | 2003 | — |
| −12 | K041319 | Sequoia Diagnostic Ultrasound System | Siemens Medical Solutions USA, Inc. | 2004 | — |
| −11 | K042770 | Modification to Acuson CV70 Cardiovascular System | Siemens Medical Solutions USA, Inc. | 2004 | 1 |
| −10 | K050240 | Modification to Acuson CV70 Cardiovascular System | Siemens Medical Solutions USA, Inc. | 2005 | 1 |
| −9 | K052894 | Sonoline G60 S Ultrasound System | Siemens Medical Solutions USA, Inc. | 2005 | 1 |
| −8 | K063138 | Modification to Acuson Antares Ultrasound System | Siemens Medical Solutions USA, Inc. | 2006 | — |
| −7 | K063803 | Acuson Antares Diagnostic Ultrasound System | Siemens Medical Solutions USA, Inc., Ultrasound DI | 2007 | 9 |
| −6 | K072786 | Acuson S2000 Ultrasound System | Siemens Medical Solutions USA, Inc. | 2007 | — |
| −5 | K081148 | Siemens Acuson 2000 Ultrasound System with Abvs Transducer | Siemens Medical Solutions USA, Inc., Ultrasound DI | 2008 | 3 |
| −4 | K111674 | Acuson | Siemens Medical Solutions USA, Inc. | 2011 | 3 |
| −3 | K121138 | Acuson S3000 Diagnostic Ultrasound System | Siemens Medical Solution | 2012 | — |
| −2 | K130881 | Acuson S2000 and S3000 | Siemens Medical Solutions USA, Inc. | 2013 | — |
| −1 | K142368 | Noblus Diagnostic Ultrasound Scanner | Hitachi Aloka Medical, Ltd. | 2015 | 1 |
| 0 (this device) | K152126 | Ust-5550-R; Ust-5536-R; L43K | Hitachi Aloka Medical America, Inc. | 2016 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1989 | 1 | 0 |
| 1992 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 1 | 0 |
| 1999 | 7 | 0 |
| 2000 | 7 | 0 |
| 2001 | 4 | 0 |
| 2002 | 9 | 0 |
| 2003 | 6 | 0 |
| 2004 | 11 | 0 |
| 2005 | 5 | 0 |
| 2006 | 3 | 0 |
| 2007 | 2 | 0 |
| 2008 | 1 | 0 |
| 2009 | 2 | 0 |
| 2010 | 5 | 0 |
| 2011 | 2 | 0 |
| 2012 | 2 | 0 |
| 2013 | 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 ITX? 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 ITX device
- #1 K260114 Align® Cover and Pad Guidance Toolscore 13.6 · 6 generations · 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.
| Type | Number | Device | Decided |
|---|---|---|---|
| * | K111227 | Aloka SSD-3500 Diagnostic Ultrasound SystemSummary page 7…0-ITX 892.1570 Diagnostic Ultrasonic Transducer 3. Legally Marketed Predicate Device(s): UST-5536-7.5 Intraoperative Ultrasound Transducer [K111227]; EUP-O54J Intraoperative Ultrasound Transducer [K142368] 4. Device Description:… | 2011 |
| * | K142368 | Noblus Diagnostic Ultrasound ScannerSummary page 6…ac – Pediatric, TEE Peripheral Peripheral Vascular Vessel Other (spec.) N = new indication. P = previously cleared by FDA in K140443, K134016 & K142368 E = added under Appendix 1 - Specifications Combination of each operating mode includes: *1 Combination of each operating… | 2015 |
What descends from it?
No later submission names this one as a predicate yet.
Has anything in its family been recalled? (0 Class I)
Recalls of this device
| Date | Class | Recall | Root cause | Reason |
|---|---|---|---|---|
| Oct 20, 2017 | Class II | Z-0816-2018 | Mixed-up of materials/components | The ultrasound probe may not have adequate protection against electrical shock hazards. |
No ancestor or descendant has a Class I recall.
What does this lineage say?
- The line of descent spans 21 years and passes through 6 companies; a new generation was cleared every 12 months on median.
- 26 of the 98 ancestors have a recall of any class.
How does its category compare?
All ITX devicesITX Transducer, Ultrasonic, Diagnostic: FDA decisions, review times, recalls and adverse event reports over 20 years. 2016, this device’s year, is highlighted.
FDA decisions per year · ITX
4in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · ITX
126in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · ITX
2in 2025
Class I (10 since 2007) Class II/III not classified
Adverse event reports per year · ITX
571in 2025
MAUDE reports naming product code ITX, 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 | 10 | 26 | 0 | 16 |
| 2008 | 12 | 73 | 4 | 39 |
| 2009 | 17 | 28 | 4 | 23 |
| 2010 | 10 | 42 | 4 | 30 |
| 2011 | 10 | 16 | 1 | 34 |
| 2012 | 7 | 25 | 1 | 29 |
| 2013 | 3 | 105 | 0 | 38 |
| 2014 | 4 | 41 | 1 | 43 |
| 2015 | 1 | — | 5 | 183 |
| 2016 | 4 | 151 | 0 | 269 |
| 2017 | 6 | 110 | 1 | 412 |
| 2018 | 2 | — | 15 | 130 |
| 2019 | 1 | — | 0 | 119 |
| 2020 | 3 | 120 | 3 | 116 |
| 2021 | 3 | 139 | 10 (10) | 146 |
| 2022 | 2 | — | 6 | 87 |
| 2023 | 6 | 213 | 1 | 138 |
| 2024 | 3 | 81 | 1 | 988 |
| 2025 | 4 | 126 | 2 | 571 |
| 2026 | 6 | 158 | 0 | — |
What is it indicated for?
The UST-5550-R and UST-5536-R transducer is intended for use with the PROSOUND ALPHA 7 Diagnostic Ultrasound Systems by trained personnel (doctor, sonography, etc.) for the diagnostic ultrasound evaluation during robotic* and non-robotic** intra-operative and laparoscopic procedures. The L43K transducer is intended for use with the ARIETTA60, ARIETTA70 and NOBLUS Diagnostic Ultrasound Systems by trained personnel (doctor, sonography, etc.) for diagnostic…
Read the full statement (114 words)
The UST-5550-R and UST-5536-R transducer is intended for use with the PROSOUND ALPHA 7 Diagnostic Ultrasound Systems by trained personnel (doctor, sonography, etc.) for the diagnostic ultrasound evaluation during robotic* and non-robotic** intra-operative and laparoscopic procedures.
The L43K transducer is intended for use with the ARIETTA60, ARIETTA70 and NOBLUS Diagnostic Ultrasound Systems by trained personnel (doctor, sonography, etc.) for diagnostic ultrasound evaluation during robotic* and non-robotic** intra-operative and laparoscopic procedures.
This device is not indicated for Ophthalmic applications.
*For robotic use, these devices can only be used with the da Vinci™ Surgical System and da Vinci™ 8 mm ProGrasp Forceps.
**For non-robotic use, these devices can only be used with the Covidien SILS™ Clinch
Indications for use read by OCR from a scanned FDA summary, so letters may be misread. Check the PDF before quoting it.
https://510kreport.com/device/K152126 · printed Nov 6, 2026
Cite this page
510(k) Report. “K152126: Ust-5550-R; Ust-5536-R; L43K.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K152126
Report an extraction error
Are you the manufacturer?
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