510(k) · Cleared
ClearedBT-350
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Bistos Co., Ltd. · HGM System, Monitoring, Perinatal
Cleared on May 13, 2011 as substantially equivalent to K994008 (Biosys Co., Ltd., 2000) after a 162-day review. Its family tree reaches back 2 generations to 1994.
- Decided
- May 13, 2011
- Review
- 162 days
- Class
- Class II
- Product code
- HGM
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 2 generations to K934959 (1994). No later device cites it as a predicate yet.
View FIG. 1 as a table
Line of descent and top descendants
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 HGM? 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 HGM device
- #1 K241882 Fetal & Maternal Monitor (F15A, F15A Air)score 19.5 · 33 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 |
|---|---|---|---|
| * | K994008 | Biosys Fetal Monitor, Model Ifm-500Summary page 1…ate Devices: Manufacturer :Biosys Co., Ltd. Device :IFM-500 Ultrasound Fetal Monitor 510(k) Number :K994008(Decision Date - Sep. 29. 2000) 4. Classifications Names & Citations: 21CFR 884.2740, HGM, System, Monitoring, Perinatal, C… | 2000 |
What descends from it?
No later submission names this one as a predicate yet.
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 17 years and passes through 3 companies; a new generation was cleared every 10.6 years on median.
- None of the 2 ancestors has a recall.
- 2 other devices also cite its predicate K994008.
How does its category compare?
All HGM devicesHGM System, Monitoring, Perinatal: FDA decisions, review times, recalls and adverse event reports over 20 years. 2011, this device’s year, is highlighted.
FDA decisions per year · HGM
4in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · HGM
269in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · HGM
5in 2019
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · HGM
99in 2025
MAUDE reports naming product code HGM, 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 | 3 | 56 | 0 | 35 |
| 2008 | 4 | 75 | 4 | 17 |
| 2009 | 4 | 66 | 6 | 42 |
| 2010 | 4 | 193 | 0 | 64 |
| 2011 | 13 | 141 | 0 | 83 |
| 2012 | 4 | 107 | 0 | 44 |
| 2013 | 2 | — | 1 | 16 |
| 2014 | 4 | 231 | 1 | 30 |
| 2015 | 5 | 169 | 0 | 44 |
| 2016 | 1 | — | 0 | 17 |
| 2017 | 3 | 138 | 0 | 27 |
| 2018 | 3 | 258 | 0 | 30 |
| 2019 | 0 | — | 5 | 41 |
| 2020 | 1 | — | 0 | 19 |
| 2021 | 0 | — | 0 | 71 |
| 2022 | 1 | — | 0 | 87 |
| 2023 | 2 | — | 0 | 69 |
| 2024 | 1 | — | 0 | 174 |
| 2025 | 4 | 269 | 0 | 99 |
| 2026 | 2 | — | 2 | — |
What is it indicated for?
The BT-350 is a Prenatal Monitoring System for non-invasively measuring and showing graphically maternal abdominal contractions and the fetal heart rate by means of display on a non-permanent graphical display and on a strip chart recorder. This data is intended to aid in assessing the well being of the fetus during the antepartum periods (Non-Stress Test). Therefore the BT-350 is not used in delivery room. This device is for use only by trained medical personnel located in hospitals, clinics, doctor's offices and in the patient's home.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K103545 · printed Nov 6, 2026
Cite this page
510(k) Report. “K103545: BT-350.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K103545
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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