510(k) · Cleared
ClearedUltrasonic Doppler (Model YM-2T8)
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Shenzhen Imdk Medical Technology Co., Ltd. · KNG Monitor, Ultrasonic, Fetal
Cleared on Jul 19, 2018 as substantially equivalent to K153475 (Edan Instruments, Inc., 2016) after a 154-day review. Its family tree reaches back 7 generations to 1994. 2 later devices descend from it.
- Decided
- Jul 19, 2018
- Review
- 154 days
- Class
- Class II
- Product code
- KNG
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 7 generations to K930200 (1994). 11 ancestors in all. 2 later devices descend from it, 2 citing it directly.
- Root · 7 generations backK930200 Multi Dopplex II / Fetal Dopplex IIHuntleigh Healthcare, Inc. · 1994
- 6 generations backK991441 Cadence Doppler Ultrasound SystemMedasonics, Inc. · 1999
- 5 generations backK024197 Lifedop DopplerSummit Doppler Systems, Inc. · 2003 · Recalled
- 4 generations backK080087 Sonotrax Ultrasonic Fetal and Vascular Pocket Doppler, Models Lite…Edan Instruments, Inc. · 2008
- 3 generations backK092997 Ultrasonic Tabletop Doppler, Models SD5 and SD6Edan Instruments, Inc. · 2009
- 2 generations backK102138 Ultrasonic Tabletop Doppler; Ultrasonic Tabletop DopplerEdan Instruments, Inc. · 2010
- 1 generation backK153475 SD5 & SD6 Ultrasonic Tabletop DopplerEdan Instruments, Inc. · 2016
- This deviceK180419 Ultrasonic Doppler (Model YM-2T8)Shenzhen Imdk Medical Technology Co., Ltd. · 2018
- Descendant · cites it directly · 0 of its ownK182710 Fetal Doppler, Model FD88Shenzzhen Luckcome Technology Inc., Ltd. · 2019
- Descendant · cites it directly · 0 of its ownK182190 Fetal DopplerShenzhen AOJ Medical Technology Co., Ltd. · 2018
Most influential descendants
Showing 2 of 2 · See allView FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −7 | K930200 | Multi Dopplex II / Fetal Dopplex II | Huntleigh Healthcare, Inc. | 1994 | — |
| −6 | K991441 | Cadence Doppler Ultrasound System | Medasonics, Inc. | 1999 | — |
| −5 | K024197 | Lifedop Doppler | Summit Doppler Systems, Inc. | 2003 | 1 |
| −4 | K080087 | Sonotrax Ultrasonic Fetal and Vascular Pocket Doppler, Models Lite, Basic… | Edan Instruments, Inc. | 2008 | — |
| −3 | K092997 | Ultrasonic Tabletop Doppler, Models SD5 and SD6 | Edan Instruments, Inc. | 2009 | — |
| −2 | K102138 | Ultrasonic Tabletop Doppler; Ultrasonic Tabletop Doppler | Edan Instruments, Inc. | 2010 | — |
| −1 | K153475 | SD5 & SD6 Ultrasonic Tabletop Doppler | Edan Instruments, Inc. | 2016 | — |
| 0 (this device) | K180419 | Ultrasonic Doppler (Model YM-2T8) | Shenzhen Imdk Medical Technology Co., Ltd. | 2018 | — |
| +1 | K182710 | Fetal Doppler, Model FD88 | Shenzzhen Luckcome Technology Inc., Ltd. | 2019 | — |
| +1 | K182190 | Fetal Doppler | Shenzhen AOJ Medical Technology Co., Ltd. | 2018 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1994 | 1 | 0 |
| 2001 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 1 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2018 | 1 | 0 |
| 2019 | 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 KNG? 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 KNG device
- #1 K252669 Fetal Doppler U8-25, U9-25score 13.0 · 9 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 |
|---|---|---|---|
| * | K153475 | SD5 & SD6 Ultrasonic Tabletop DopplerSummary page 4…84.2660 Device Classification: Class II Product Code: KNG Review Panel: Obstetrics/Gynecology 3. Predicate Device 510(k) Number: K153475 Device Name: SD5 Ultrasonic Tabletop Doppler Manufacturer: Edan Instruments, Inc. The predicate device ha… | 2016 |
What descends from it? (2)
2 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 24 years and passes through 5 companies; a new generation was cleared every 3.0 years on median.
- 1 of the 11 ancestors has a recall of any class.
- Of its descendants, K182710 (Shenzzhen Luckcome Technology Inc., Ltd., 2019) has gone furthest, with 0 descendants of its own.
- 1 other device also cites its predicate K153475.
How does its category compare?
All KNG devicesKNG Monitor, Ultrasonic, Fetal: FDA decisions, review times, recalls and adverse event reports over 20 years. 2018, this device’s year, is highlighted.
FDA decisions per year · KNG
1in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · KNG
202in 2019
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · KNG
No recall names KNG since 2007.
Adverse event reports per year · KNG
1in 2025
MAUDE reports naming product code KNG, 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 | — | 0 | 0 |
| 2008 | 1 | — | 0 | 2 |
| 2009 | 3 | 181 | 0 | 0 |
| 2010 | 2 | — | 0 | 0 |
| 2011 | 5 | 57 | 0 | 0 |
| 2012 | 0 | — | 0 | 0 |
| 2013 | 0 | — | 0 | 1 |
| 2014 | 1 | — | 0 | 1 |
| 2015 | 1 | — | 0 | 0 |
| 2016 | 1 | — | 0 | 0 |
| 2017 | 0 | — | 0 | 3 |
| 2018 | 3 | 154 | 0 | 8 |
| 2019 | 3 | 202 | 0 | 1 |
| 2020 | 0 | — | 0 | 2 |
| 2021 | 1 | — | 0 | 1 |
| 2022 | 2 | — | 0 | 0 |
| 2023 | 0 | — | 0 | 2 |
| 2024 | 2 | — | 0 | 3 |
| 2025 | 1 | — | 0 | 1 |
| 2026 | 1 | — | 0 | — |
What is it indicated for?
The Ultrasonic Doppler uses continuous-wave Doppler to detect fetal heart beats, display fetal heart rate and play the fetal heart sound from early gestation thru delivery for singleton pregnancies. The Ultrasonic Doppler is intended for use by trained healthcare professionals only in a clinical setting.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K180419 · printed Nov 6, 2026
Cite this page
510(k) Report. “K180419: Ultrasonic Doppler (Model YM-2T8).” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K180419
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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