510(k) · Cleared
ClearedCBit Series Digital Color Doppler Ultrasound System
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
CHISON Medical Technologies Co., Ltd. · IYN System, Imaging, Pulsed Doppler, Ultrasonic
Cleared on Aug 17, 2018 as substantially equivalent to K170374 (Chison Medical Imaging Co., Ltd., 2017) after a 126-day review. Its family tree reaches back 23 generations to 1995. 3 later devices descend from it.
- Decided
- Aug 17, 2018
- Review
- 126 days
- Class
- Class II
- Product code
- IYN
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 23 generations to K935595 (1995). 199 ancestors in all, the oldest K852159 (1985). 3 later devices descend from it, 1 citing it directly.
- Root · 23 generations backK935595 Acuson Model 3001Acuson Corp. · 1995
- 19 generations between
- 3 generations backK132341 DC-8/ DC-8 Pro/ DC-8 CV/ DC-8 Exp/ DC-8S Diagnostic Ultrasound SystemsShenzhen Mindray Bio-Medical Electronics Co., Ltd. · 2013
- 2 generations backK150861 QBit Series Diagnostic Ultrasound SystemChison Medical Imaging Co., Ltd. · 2015
- 1 generation backK170374 SonoBook Series Diagnostic Ultrasound SystemChison Medical Imaging Co., Ltd. · 2017
- This deviceK180974 CBit Series Digital Color Doppler Ultrasound SystemCHISON Medical Technologies Co., Ltd. · 2018
- Descendant · cites it directly · 2 of its ownK200780 XBit Series Digital Color Doppler Ultrasound SystemCHISON Medical Technologies Co., Ltd. · 2020
- Descendant · 2 generations on · 1 of its ownK233697 SonoMax Series Digital Color Doppler Ultrasound SystemCHISON Medical Technologies Co., Ltd. · 2024
- Descendant · 3 generations on · 0 of its ownK253949 SonoPort Series Digital Color Doppler Ultrasound System (SonoPort 1…CHISON Medical Technologies Co., Ltd. · 2026
Show all 23 generations
- Root · 23 generations backK935595 Acuson Model 3001Acuson Corp. · 1995
- 22 generations backK973767 Harmonic Imaging with ContrastAcuson Corp. · 1997
- 21 generations backK022567 Sequoia Signature II Diagnostic Ultrasound SystemAcuson Corp. · 2002
- 20 generations backK032111 Acuson CV70 Cardiovascular SystemSiemens Medical Solutions USA, Inc. · 2003 · Recalled
- 19 generations backK040060 Sonoline G50 and G60 S Diagnostic Ultrasound SystemsSiemens Medical Solutions USA, Inc. · 2004
- 18 generations backK043078 Nemio Diagnostic Ultrasound System, Model Ssa-550AToshiba America Medical Systems, In.C · 2004 · Recalled
- 17 generations backK051500 Famio Diagnostic Ultrasound Systems, Model Ssa-530AToshiba America Medical Systems, In.C · 2005
- 16 generations backK053346 Modification to: DP-9900 Digital Ultrasonic Diagnostic Imaging…Shenzhen Mindray Bio-Medical Electronics Co., Ltd. · 2005
- 15 generations backK061189 DP-9900 Digital Ultrasonic Diagnostic Imaging SystemShenzhen Mindray Bio-Medical Electronics Co., Ltd. · 2006
- 14 generations backK063500 DC-6 Diagnostic Ultrasound SystemShenzhen Mindray Bio-Medical Electronics Co., Ltd. · 2006
- 13 generations backK072164 DC-6 Diagnostic Ultrasound SystemShenzhen Mindray Bio-Medical Electronics Co., Ltd. · 2007
- 12 generations backK080640 M5 Diagnostic Ultrasound SystemShenzhen Mindray Bio-Medical Electronics Co., Ltd. · 2008
- 11 generations backK081320 DC-3, DC-3T Diagnostic Ultrasound SystemShenzhen Mindray Bio-Medical Electronics Co., Ltd. · 2008
- 10 generations backK083505 DC-3/DC-3T Diagnostic Ultrasound SystemShenzhen Mindray Bio-Medical Electronics Co., Ltd. · 2008
- 9 generations backK091941 DC-3/DC-3T Diagnostic Ultrasound SystemShenzhen Mindray Bio-Medical Electronics Co., Ltd. · 2009
- 8 generations backK092691 DC-7 Diagnostic Ultrasound SystemShenzhen Mindray Bio-Medical Electronics Co., Ltd. · 2009
- 7 generations backK101041 DC-7 Diagnostic Ultrasound SystemShenzhen Mindray Bio-Medical Electronics Co., Ltd. · 2010
- 6 generations backK103583 DC-7 Diagnostic Ultrasound SystemShenzhen Mindray Bio-Medical Electronics Co., Ltd. · 2010
- 5 generations backK113647 DC-8/DC-8 Pro/DC-8 CV/DC-8 Exp/DC-8S Diagnostic Ultrasound SystemShenzhen Mindray Bio-Medical Electronics Co., Ltd. · 2011
- 4 generations backK121010 M7/M7T Diagnostic Ultrasound SystemShenzhen Mindray Bio-Medical Electronics Co., Ltd. · 2012
- 3 generations backK132341 DC-8/ DC-8 Pro/ DC-8 CV/ DC-8 Exp/ DC-8S Diagnostic Ultrasound SystemsShenzhen Mindray Bio-Medical Electronics Co., Ltd. · 2013
- 2 generations backK150861 QBit Series Diagnostic Ultrasound SystemChison Medical Imaging Co., Ltd. · 2015
- 1 generation backK170374 SonoBook Series Diagnostic Ultrasound SystemChison Medical Imaging Co., Ltd. · 2017
- This deviceK180974 CBit Series Digital Color Doppler Ultrasound SystemCHISON Medical Technologies Co., Ltd. · 2018
Most influential descendants
Showing 3 of 3 · See all- K200780XBit Series Digital Color Doppler Ultrasound SystemCHISON Medical Technologies Co., Ltd. · 2020 · cites it directly2descendants
- K233697SonoMax Series Digital Color Doppler Ultrasound SystemCHISON Medical Technologies Co., Ltd. · 2024 · 2 generations on1descendant
- K253949SonoPort Series Digital Color Doppler Ultrasound System (SonoPort 1, SonoPort 1 Exp…CHISON Medical Technologies Co., Ltd. · 2026 · 3 generations on0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −23 | K935595 | Acuson Model 3001 | Acuson Corp. | 1995 | — |
| −22 | K973767 | Harmonic Imaging with Contrast | Acuson Corp. | 1997 | — |
| −21 | K022567 | Sequoia Signature II Diagnostic Ultrasound System | Acuson Corp. | 2002 | — |
| −20 | K032111 | Acuson CV70 Cardiovascular System | Siemens Medical Solutions USA, Inc. | 2003 | 1 |
| −19 | K040060 | Sonoline G50 and G60 S Diagnostic Ultrasound Systems | Siemens Medical Solutions USA, Inc. | 2004 | — |
| −18 | K043078 | Nemio Diagnostic Ultrasound System, Model Ssa-550A | Toshiba America Medical Systems, In.C | 2004 | 1 |
| −17 | K051500 | Famio Diagnostic Ultrasound Systems, Model Ssa-530A | Toshiba America Medical Systems, In.C | 2005 | — |
| −16 | K053346 | Modification to: DP-9900 Digital Ultrasonic Diagnostic Imaging System, Model… | Shenzhen Mindray Bio-Medical Electronics Co., Ltd. | 2005 | — |
| −15 | K061189 | DP-9900 Digital Ultrasonic Diagnostic Imaging System | Shenzhen Mindray Bio-Medical Electronics Co., Ltd. | 2006 | — |
| −14 | K063500 | DC-6 Diagnostic Ultrasound System | Shenzhen Mindray Bio-Medical Electronics Co., Ltd. | 2006 | — |
| −13 | K072164 | DC-6 Diagnostic Ultrasound System | Shenzhen Mindray Bio-Medical Electronics Co., Ltd. | 2007 | — |
| −12 | K080640 | M5 Diagnostic Ultrasound System | Shenzhen Mindray Bio-Medical Electronics Co., Ltd. | 2008 | — |
| −11 | K081320 | DC-3, DC-3T Diagnostic Ultrasound System | Shenzhen Mindray Bio-Medical Electronics Co., Ltd. | 2008 | — |
| −10 | K083505 | DC-3/DC-3T Diagnostic Ultrasound System | Shenzhen Mindray Bio-Medical Electronics Co., Ltd. | 2008 | — |
| −9 | K091941 | DC-3/DC-3T Diagnostic Ultrasound System | Shenzhen Mindray Bio-Medical Electronics Co., Ltd. | 2009 | — |
| −8 | K092691 | DC-7 Diagnostic Ultrasound System | Shenzhen Mindray Bio-Medical Electronics Co., Ltd. | 2009 | — |
| −7 | K101041 | DC-7 Diagnostic Ultrasound System | Shenzhen Mindray Bio-Medical Electronics Co., Ltd. | 2010 | — |
| −6 | K103583 | DC-7 Diagnostic Ultrasound System | Shenzhen Mindray Bio-Medical Electronics Co., Ltd. | 2010 | — |
| −5 | K113647 | DC-8/DC-8 Pro/DC-8 CV/DC-8 Exp/DC-8S Diagnostic Ultrasound System | Shenzhen Mindray Bio-Medical Electronics Co., Ltd. | 2011 | — |
| −4 | K121010 | M7/M7T Diagnostic Ultrasound System | Shenzhen Mindray Bio-Medical Electronics Co., Ltd. | 2012 | — |
| −3 | K132341 | DC-8/ DC-8 Pro/ DC-8 CV/ DC-8 Exp/ DC-8S Diagnostic Ultrasound Systems | Shenzhen Mindray Bio-Medical Electronics Co., Ltd. | 2013 | — |
| −2 | K150861 | QBit Series Diagnostic Ultrasound System | Chison Medical Imaging Co., Ltd. | 2015 | — |
| −1 | K170374 | SonoBook Series Diagnostic Ultrasound System | Chison Medical Imaging Co., Ltd. | 2017 | — |
| 0 (this device) | K180974 | CBit Series Digital Color Doppler Ultrasound System | CHISON Medical Technologies Co., Ltd. | 2018 | — |
| +1 | K200780 | XBit Series Digital Color Doppler Ultrasound System | CHISON Medical Technologies Co., Ltd. | 2020 | — |
| +2 | K233697 | SonoMax Series Digital Color Doppler Ultrasound System | CHISON Medical Technologies Co., Ltd. | 2024 | — |
| +3 | K253949 | SonoPort Series Digital Color Doppler Ultrasound System (SonoPort 1, SonoPort… | CHISON Medical Technologies Co., Ltd. | 2026 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1985 | 1 | 0 |
| 1987 | 1 | 0 |
| 1989 | 1 | 0 |
| 1992 | 2 | 0 |
| 1994 | 7 | 0 |
| 1995 | 6 | 0 |
| 1996 | 3 | 0 |
| 1997 | 8 | 0 |
| 1998 | 3 | 0 |
| 1999 | 10 | 0 |
| 2000 | 9 | 0 |
| 2001 | 13 | 0 |
| 2002 | 11 | 0 |
| 2003 | 13 | 0 |
| 2004 | 17 | 0 |
| 2005 | 14 | 0 |
| 2006 | 13 | 0 |
| 2007 | 10 | 0 |
| 2008 | 9 | 0 |
| 2009 | 9 | 0 |
| 2010 | 8 | 0 |
| 2011 | 4 | 0 |
| 2012 | 4 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2020 | 1 | 0 |
| 2024 | 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 |
|---|---|---|---|
| * | K170374 | SonoBook Series Diagnostic Ultrasound SystemSummary page 35…Device Manufacturer Model 510(k)Number 1.Main predicate device CHISON SonoBook 9 K170374 2.Reference device CHISON QBit 9 K150861 4. Device Description: The CBit Series… | 2017 |
| * | — | CHISON SonoBook 9 Diagnostic Ultrasound System Named without a submission number | |
| † | K150861 | QBit Series Diagnostic Ultrasound System | 2015 |
What descends from it? (3)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K200780 | XBit Series Digital Color Doppler Ultrasound System | 2020 | 2 |
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 23 years and passes through 6 companies; a new generation was cleared every 7 months on median.
- 50 of the 199 ancestors have a recall of any class.
- Of its descendants, K200780 (CHISON Medical Technologies Co., Ltd., 2020) has gone furthest, with 2 descendants of its own.
- 1 other device also cites its predicate K170374.
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. 2018, 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 device is a general-purpose ultrasonic imaging instrument intended for use by a qualified clinician for evaluation of Fetal , Abdominal, Pediatric, Small Organ (breast, thyroid, testes), Neonatal Cephalic ,Adult Cephalic, Cardiac (adult , pediatric), Musculo -skeletal (Conventional, Superficial),Peripheral Vascular, Trans-esophageal, Trans-rectal,Trans-vaginal, OB/GYN and Urology.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K180974 · printed Nov 4, 2026
Cite this page
510(k) Report. “K180974: CBit Series Digital Color Doppler 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/K180974
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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