510(k) · Cleared
ClearedACUSON Sequoia Diagnostic Ultrasound System
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Siemens Medical Solutions USA, Inc. · IYN System, Imaging, Pulsed Doppler, Ultrasonic
Cleared on Jun 14, 2022 as substantially equivalent to K211859 (Siemens Medical Solutions USA, Inc., 2021) and 1 other predicate after a 22-day review. Its family tree reaches back 29 generations to 1995. 6 later devices descend from it.
- Decided
- Jun 14, 2022
- Review
- 22 days
- Class
- Class II
- Product code
- IYN
- Recalls
- None
- Predicates
- 2
Its longest line of descent runs back 29 generations to K935595 (1995). 252 ancestors in all, the oldest K863700 (1987). 6 later devices descend from it, 1 citing it directly.
- Root · 29 generations backK935595 Acuson Model 3001Acuson Corp. · 1995
- 25 generations between
- 3 generations backK200707 ACUSON Sequoia Diagnostic Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2020
- 2 generations backK201462 ACUSON Sequoia Diagnostic Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2020 · Recalled
- 1 generation backK210743 ACUSON Redwood Diagnostic Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2021 · Recalled
- This deviceK221500 ACUSON Sequoia Diagnostic Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2022
- Descendant · cites it directly · 5 of its ownK223735 ACUSON Sequoia Diagnostic Ultrasound System, ACUSON Sequoia Select…Siemens Medical Solutions USA, Inc. · 2023
- Descendant · 2 generations on · 4 of its ownK232145 ACUSON Sequoia Diagnostic Ultrasound System, ACUSON Sequoia Select…Siemens Medical Solutions USA, Inc. · 2023
- Descendant · 3 generations on · 3 of its ownK240704 ACUSON Sequoia Diagnostic Ultrasound System, ACUSON Sequoia Select…Siemens Medical Solutions USA, Inc. · 2024
- Descendant · 4 generations on · 2 of its ownK242523 ACUSON Sequoia Diagnostic Ultrasound System; ACUSON Sequoia Select…Siemens Medical Solutions USA, Inc. · 2024
- Descendant · 5 generations on · 1 of its ownK251481 ACUSON Sequoia Diagnostic Ultrasound System; ACUSON Sequoia Select…Siemens Medical Solutions USA, Inc. · 2025
Show all 29 generations
- Root · 29 generations backK935595 Acuson Model 3001Acuson Corp. · 1995
- 28 generations backK973767 Harmonic Imaging with ContrastAcuson Corp. · 1997
- 27 generations backK022567 Sequoia Signature II Diagnostic Ultrasound SystemAcuson Corp. · 2002
- 26 generations backK032114 Sequoia 8.0 Diagnostic Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2003
- 25 generations backK041319 Sequoia Diagnostic Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2004
- 24 generations backK042770 Modification to Acuson CV70 Cardiovascular SystemSiemens Medical Solutions USA, Inc. · 2004 · Recalled
- 23 generations backK050240 Modification to Acuson CV70 Cardiovascular SystemSiemens Medical Solutions USA, Inc. · 2005 · Recalled
- 22 generations backK052894 Sonoline G60 S Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2005 · Recalled
- 21 generations backK063138 Modification to Acuson Antares Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2006
- 20 generations backK063803 Acuson Antares Diagnostic Ultrasound SystemSiemens Medical Solutions USA, Inc., Ultrasound DI · 2007 · Recalled
- 19 generations backK072786 Acuson S2000 Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2007
- 18 generations backK083095 Sonixtouch Ultrasound SystemUltrasonix Medical Corporation · 2008
- 17 generations backK092271 GE Logiq E9 BT2010 Diagnostic Ultrasound System, Model 5205000-3…GE Healthcare · 2009 · Recalled
- 16 generations backK110943 Logiq E9GE Healthcare · 2011 · Recalled
- 15 generations backK113690 GE Logiq I, Logiq E and Vivid EGE Healthcare · 2011 · Recalled
- 14 generations backK121699 Acuson X300 Diagnostic Ultrasound System Sonovista X300 Diagnostic…Siemens Medical Solutions USA, Inc. · 2012
- 13 generations backK123001 Acuson X700 Diagnstic Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2012 · Recalled
- 12 generations backK132804 Acuson S1000 / S2000 / S3000Siemens Medical Solutions USA, Inc. Ultrasound Gro · 2013 · Recalled
- 11 generations backK140959 Acuson S1000, S2000, S3000 Diagnostic Ultrasound SystemsSiemens Medical Solutions USA, Inc. · 2014
- 10 generations backK142876 ACUSON S1000/ S2000/ S3000 Diagnostic Ultrasound SystemsSiemens Medical Solutions USA, Inc. · 2014 · Recalled
- 9 generations backK152369 ACUSON S1000, S2000, S3000 Diagnostic Ultrasuond SystemSiemens Medical Solutions USA, Inc. Ultrasound Group · 2015
- 8 generations backK162243 ACUSON S1000 / S2000 / S3000 Diagnostic Ultrasound SystemSiemens Medi Cal Solutions, Inc. · 2016
- 7 generations backK163635 ACUSON S1000/S2000/S3000 Diagnostic Ultrasound SystemsSiemens Medical Solutions USA, Inc. Ultrasound Group · 2017 · Recalled
- 6 generations backK172162 ACUSON S3000 S2000 S1000 Diagnostic Ultrasound SystemsSiemens Healthcare · 2017
- 5 generations backK180067 ACUSON X800 Diagnostic Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2018
- 4 generations backK193257 ACUSON Sequoia Diagnostic Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2020 · Recalled
- 3 generations backK200707 ACUSON Sequoia Diagnostic Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2020
- 2 generations backK201462 ACUSON Sequoia Diagnostic Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2020 · Recalled
- 1 generation backK210743 ACUSON Redwood Diagnostic Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2021 · Recalled
- This deviceK221500 ACUSON Sequoia Diagnostic Ultrasound SystemSiemens Medical Solutions USA, Inc. · 2022
Showing 5 of 6 descendants. See all descendants
Descendants cleared per year
Most influential descendants
Showing 5 of 6 · See all- K223735ACUSON Sequoia Diagnostic Ultrasound System, ACUSON Sequoia Select Diagnostic Ultrasound…Siemens Medical Solutions USA, Inc. · 2023 · cites it directly5descendants
- K232145ACUSON Sequoia Diagnostic Ultrasound System, ACUSON Sequoia Select Diagnostic Ultrasound…Siemens Medical Solutions USA, Inc. · 2023 · 2 generations on4descendants
- K240704ACUSON Sequoia Diagnostic Ultrasound System, ACUSON Sequoia Select Diagnostic Ultrasound…Siemens Medical Solutions USA, Inc. · 2024 · 3 generations on3descendants
- K242523ACUSON Sequoia Diagnostic Ultrasound System; ACUSON Sequoia Select Diagnostic Ultrasound…Siemens Medical Solutions USA, Inc. · 2024 · 4 generations on2descendants
- K251481ACUSON Sequoia Diagnostic Ultrasound System; ACUSON Sequoia Select Diagnostic Ultrasound…Siemens Medical Solutions USA, Inc. · 2025 · 5 generations on1descendant
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −29 | K935595 | Acuson Model 3001 | Acuson Corp. | 1995 | — |
| −28 | K973767 | Harmonic Imaging with Contrast | Acuson Corp. | 1997 | — |
| −27 | K022567 | Sequoia Signature II Diagnostic Ultrasound System | Acuson Corp. | 2002 | — |
| −26 | K032114 | Sequoia 8.0 Diagnostic Ultrasound System | Siemens Medical Solutions USA, Inc. | 2003 | — |
| −25 | K041319 | Sequoia Diagnostic Ultrasound System | Siemens Medical Solutions USA, Inc. | 2004 | — |
| −24 | K042770 | Modification to Acuson CV70 Cardiovascular System | Siemens Medical Solutions USA, Inc. | 2004 | 1 |
| −23 | K050240 | Modification to Acuson CV70 Cardiovascular System | Siemens Medical Solutions USA, Inc. | 2005 | 1 |
| −22 | K052894 | Sonoline G60 S Ultrasound System | Siemens Medical Solutions USA, Inc. | 2005 | 1 |
| −21 | K063138 | Modification to Acuson Antares Ultrasound System | Siemens Medical Solutions USA, Inc. | 2006 | — |
| −20 | K063803 | Acuson Antares Diagnostic Ultrasound System | Siemens Medical Solutions USA, Inc., Ultrasound DI | 2007 | 9 |
| −19 | K072786 | Acuson S2000 Ultrasound System | Siemens Medical Solutions USA, Inc. | 2007 | — |
| −18 | K083095 | Sonixtouch Ultrasound System | Ultrasonix Medical Corporation | 2008 | — |
| −17 | K092271 | GE Logiq E9 BT2010 Diagnostic Ultrasound System, Model 5205000-3, 5205000-4 | GE Healthcare | 2009 | 1 |
| −16 | K110943 | Logiq E9 | GE Healthcare | 2011 | 2 |
| −15 | K113690 | GE Logiq I, Logiq E and Vivid E | GE Healthcare | 2011 | 1 |
| −14 | K121699 | Acuson X300 Diagnostic Ultrasound System Sonovista X300 Diagnostic Ultrasound… | Siemens Medical Solutions USA, Inc. | 2012 | — |
| −13 | K123001 | Acuson X700 Diagnstic Ultrasound System | Siemens Medical Solutions USA, Inc. | 2012 | 2 |
| −12 | K132804 | Acuson S1000 / S2000 / S3000 | Siemens Medical Solutions USA, Inc. Ultrasound Gro | 2013 | 3 |
| −11 | K140959 | Acuson S1000, S2000, S3000 Diagnostic Ultrasound Systems | Siemens Medical Solutions USA, Inc. | 2014 | — |
| −10 | K142876 | ACUSON S1000/ S2000/ S3000 Diagnostic Ultrasound Systems | Siemens Medical Solutions USA, Inc. | 2014 | 1 |
| −9 | K152369 | ACUSON S1000, S2000, S3000 Diagnostic Ultrasuond System | Siemens Medical Solutions USA, Inc. Ultrasound Group | 2015 | — |
| −8 | K162243 | ACUSON S1000 / S2000 / S3000 Diagnostic Ultrasound System | Siemens Medi Cal Solutions, Inc. | 2016 | — |
| −7 | K163635 | ACUSON S1000/S2000/S3000 Diagnostic Ultrasound Systems | Siemens Medical Solutions USA, Inc. Ultrasound Group | 2017 | 1 |
| −6 | K172162 | ACUSON S3000 S2000 S1000 Diagnostic Ultrasound Systems | Siemens Healthcare | 2017 | — |
| −5 | K180067 | ACUSON X800 Diagnostic Ultrasound System | Siemens Medical Solutions USA, Inc. | 2018 | — |
| −4 | K193257 | ACUSON Sequoia Diagnostic Ultrasound System | Siemens Medical Solutions USA, Inc. | 2020 | 1 |
| −3 | K200707 | ACUSON Sequoia Diagnostic Ultrasound System | Siemens Medical Solutions USA, Inc. | 2020 | — |
| −2 | K201462 | ACUSON Sequoia Diagnostic Ultrasound System | Siemens Medical Solutions USA, Inc. | 2020 | 1 |
| −1 | K210743 | ACUSON Redwood Diagnostic Ultrasound System | Siemens Medical Solutions USA, Inc. | 2021 | 3 |
| 0 (this device) | K221500 | ACUSON Sequoia Diagnostic Ultrasound System | Siemens Medical Solutions USA, Inc. | 2022 | — |
| +1 | K223735 | ACUSON Sequoia Diagnostic Ultrasound System, ACUSON Sequoia Select Diagnostic… | Siemens Medical Solutions USA, Inc. | 2023 | — |
| +2 | K232145 | ACUSON Sequoia Diagnostic Ultrasound System, ACUSON Sequoia Select Diagnostic… | Siemens Medical Solutions USA, Inc. | 2023 | — |
| +3 | K240704 | ACUSON Sequoia Diagnostic Ultrasound System, ACUSON Sequoia Select Diagnostic… | Siemens Medical Solutions USA, Inc. | 2024 | — |
| +4 | K242523 | ACUSON Sequoia Diagnostic Ultrasound System; ACUSON Sequoia Select Diagnostic… | Siemens Medical Solutions USA, Inc. | 2024 | — |
| +5 | K251481 | ACUSON Sequoia Diagnostic Ultrasound System; ACUSON Sequoia Select Diagnostic… | Siemens Medical Solutions USA, Inc. | 2025 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 5 | 0 |
| 1994 | 8 | 0 |
| 1995 | 7 | 0 |
| 1996 | 4 | 0 |
| 1997 | 7 | 0 |
| 1998 | 6 | 0 |
| 1999 | 8 | 0 |
| 2000 | 9 | 0 |
| 2001 | 11 | 0 |
| 2002 | 14 | 0 |
| 2003 | 16 | 0 |
| 2004 | 18 | 0 |
| 2005 | 14 | 0 |
| 2006 | 10 | 0 |
| 2007 | 12 | 0 |
| 2008 | 10 | 0 |
| 2009 | 11 | 0 |
| 2010 | 11 | 0 |
| 2011 | 3 | 0 |
| 2012 | 8 | 0 |
| 2013 | 7 | 0 |
| 2014 | 2 | 0 |
| 2015 | 2 | 0 |
| 2016 | 3 | 0 |
| 2017 | 2 | 0 |
| 2018 | 1 | 0 |
| 2019 | 2 | 0 |
| 2021 | 1 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2023 | 2 | 0 |
| 2024 | 2 | 0 |
| 2025 | 1 | 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 IYN? 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 IYN device
- #1 K240850 EPIQ Series Diagnostic Ultrasound Systems…score 32.1 · 24 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 |
|---|---|---|---|
| * | K211859 | ACUSON Sequoia Diagnostic Ultrasound SystemSummary page 5…multi-purpose diagnostic ultrasound system with accessories and proprietary software, and is substantially equivalent to the company’s own products, the ACUSON Sequoia (K211859) which is primary predicated device and the ACUSON Redwood(K210743). - Primary Predicate Device: ACUSON Sequoia (K211859)… | 2021 |
| * | K210743 | ACUSON Redwood Diagnostic Ultrasound SystemSummary page 5…oprietary software, and is substantially equivalent to the company’s own products, the ACUSON Sequoia (K211859) which is primary predicated device and the ACUSON Redwood(K210743). - Primary Predicate Device: ACUSON Sequoia (K211859) - Reference Device: ACUSON Redwood(K210743) ACUSON Sequo… | 2021 |
What descends from it? (6)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K223735 | ACUSON Sequoia Diagnostic Ultrasound System, ACUSON Sequoia Select Diagnostic Ultrasound… | 2023 | 5 |
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 27 years and passes through 9 companies; a new generation was cleared every 9 months on median.
- 71 of the 252 ancestors have a recall of any class.
- Of its descendants, K223735 (Siemens Medical Solutions USA, Inc., 2023) has gone furthest, with 5 descendants of its own.
How does its category compare?
All IYN devicesIYN System, Imaging, Pulsed Doppler, Ultrasonic: FDA decisions, review times, recalls and adverse event reports over 20 years. 2022, this device’s year, is highlighted.
FDA decisions per year · IYN
57in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · IYN
124in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · IYN
10in 2025
Class I (1 since 2007) Class II/III not classified
Adverse event reports per year · IYN
610in 2025
MAUDE reports naming product code IYN, 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 | 13 | 26 | 16 | 3 |
| 2008 | 25 | 18 | 12 | 2 |
| 2009 | 18 | 29 | 8 | 9 |
| 2010 | 29 | 67 | 10 | 17 |
| 2011 | 39 | 46 | 8 | 18 |
| 2012 | 43 | 37 | 3 | 20 |
| 2013 | 51 | 60 | 8 | 18 |
| 2014 | 56 | 39 | 2 | 48 |
| 2015 | 54 | 55 | 3 | 116 |
| 2016 | 60 | 56 | 2 | 145 |
| 2017 | 64 | 83 | 0 | 146 |
| 2018 | 59 | 85 | 7 | 85 |
| 2019 | 47 | 79 | 0 | 59 |
| 2020 | 57 | 72 | 4 | 67 |
| 2021 | 46 | 105 | 8 | 213 |
| 2022 | 53 | 105 | 10 | 186 |
| 2023 | 44 | 115 | 4 | 229 |
| 2024 | 50 | 119 | 1 | 266 |
| 2025 | 57 | 124 | 10 | 610 |
| 2026 | 44 | 107 | 2 (1) | — |
What is it indicated for?
The ACUSON Sequoia ultrasound imaging system is intended to provide images of, or signals from, inside the body by an appropriately trained healthcare professional in a clinical setting for the following applications: Fetal, Abdominal, Pediatric, Neonatal Cephalic, Small Parts, OB/GYN (useful for visualization of the ovaries, follicles, uterus and other pelvic structures), Cardiac, Pelvic, Vascular, Adult Cephalic, Musculoskeletal and Peripheral Vascular…
Read the full statement (232 words)
The ACUSON Sequoia ultrasound imaging system is intended to provide images of, or signals from, inside the body by an appropriately trained healthcare professional in a clinical setting for the following applications: Fetal, Abdominal, Pediatric, Neonatal Cephalic, Small Parts, OB/GYN (useful for visualization of the ovaries, follicles, uterus and other pelvic structures), Cardiac, Pelvic, Vascular, Adult Cephalic, Musculoskeletal and Peripheral Vascular applications.
The system supports the Ultrasonically-Derived Fat Fraction (UDFF) measurement tool to report an index that can be useful as an aid to a physician managing adult patients with hepatic steatosis.
The system also provides the ability to measure anatomical structures for fetal, abdominal, pediatric, small organ, cardiac, transrectal, transvaginal, peripheral vessel, musculoskeletal and calculation packages that provide information to the clinician that may be used adjunctively with other medical data obtained by a physician for clinical diagnosis purposes.
Operating Modes
2D-mode
2D-mode
2D-mode with Harmonics Imaging
2D-mode with Harmonics Imaging for Contrast Agent Imaging
3D/4D Volume Imaging
Color flow Doppler
Color (velocity)
Power (energy)
Doppler
Pulsed Wave Doppler
Pulsed Wave Doppler Tissue Imaging
High Pulsed Repetition Frequency Pulsed Wave Doppler
Steerable Continuous Wave Doppler for imaging transducers
Continuous Wave Doppler for non-imaging transducers
M-mode
M-mode with Harmonics Imaging
Anatomical M-Mode
Elastography
Strain Imaging
Shear Wave Elastography
Combined Modes
2D-mode with color
2D-mode with Doppler
2D-mode with color and Doppler
2D-mode with M-mode
2D-mode with M-mode and Color
2D-mode with Elastography
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/K221500 · printed Nov 4, 2026
Cite this page
510(k) Report. “K221500: ACUSON Sequoia Diagnostic Ultrasound System.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 4, 2026. https://510kreport.com/device/K221500
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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