510(k) · Cleared
ClearedInspectra STO2 Tissue Oxygenation Monitor, Model 650
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Hutchinson Technology, Inc. · MUD Oximeter, Tissue Saturation
Cleared on Apr 30, 2010 as substantially equivalent to K061619 (Hutchinson Technology, Inc., 2006) and 1 other predicate after a 29-day review. Its family tree reaches back 6 generations to 1998. 61 later devices descend from it.
- Decided
- Apr 30, 2010
- Review
- 29 days
- Class
- Class II
- Product code
- MUD
- Recalls
- None
- Predicates
- 2
Its longest line of descent runs back 6 generations to K963903 (1998). 61 later devices descend from it, 3 citing it directly.
- Root · 6 generations backK963903 Biospectrometer-NB Oximeter IiiiHutchinson Technology, Inc. · 1998
- 5 generations backK012759 Inspectra Tissue Spectrometer System (Inspectra), Model 325Hutchinson Technology, Inc. · 2002
- 4 generations backK023938 Modification to Inspectra Tissue Spectrometer System, Model 325Hutchinson Technology, Inc. · 2002
- 3 generations backK042020 Spectra Tissue Spectrometer System (Inspectra)Hutchinson Technology, Inc. · 2004
- 2 generations backK053618 Inspectra Tissue Spectrometer System, Model 325Hutchinson Technology, Inc. · 2006
- 1 generation backK061619 Inspectra STO2 Tissue Oxygenation MonitorHutchinson Technology, Inc. · 2006
- This deviceK100915 Inspectra STO2 Tissue Oxygenation Monitor, Model 650Hutchinson Technology, Inc. · 2010
- Descendant · cites it directly · 53 of its ownK094030 Fore-Sight Absolute Cerebral and Somatic Oximeter, MC 2000 Series…Cas Medical Systems, Inc. · 2010
- Descendant · 2 generations on · 47 of its ownK112820 Fore-Sight Absolute Tissue OximeterCas Medical Systems, Inc. · 2012
- Descendant · 3 generations on · 44 of its ownK133879 Fore-Sight Elite Absolute Tissue OximeterCas Medical Systems, Inc. · 2014
- Descendant · 2 generations on · 42 of its ownK113215 Model 7600 Regional Oximeter System with Equanox TechnologyNonin Medical, Inc. · 2012
- Descendant · 3 generations on · 37 of its ownK143675 FORE-SIGHT Elite Absolute Tissue OximeterCas Medical Systems, Inc. · 2015 · Recalled
Showing 5 of 61 descendants. See all descendants
Descendants cleared per year
Most influential descendants
Showing 5 of 61 · See all- K094030Fore-Sight Absolute Cerebral and Somatic Oximeter, MC 2000 Series, Models MC2000…Cas Medical Systems, Inc. · 2010 · cites it directly53descendants
- K112820Fore-Sight Absolute Tissue OximeterCas Medical Systems, Inc. · 2012 · 2 generations on47descendants
- K133879Fore-Sight Elite Absolute Tissue OximeterCas Medical Systems, Inc. · 2014 · 3 generations on44descendants
- K113215Model 7600 Regional Oximeter System with Equanox TechnologyNonin Medical, Inc. · 2012 · 2 generations on42descendants
- K143675FORE-SIGHT Elite Absolute Tissue OximeterCas Medical Systems, Inc. · 2015 · 3 generations on37descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −6 | K963903 | Biospectrometer-NB Oximeter Iiii | Hutchinson Technology, Inc. | 1998 | — |
| −5 | K012759 | Inspectra Tissue Spectrometer System (Inspectra), Model 325 | Hutchinson Technology, Inc. | 2002 | — |
| −4 | K023938 | Modification to Inspectra Tissue Spectrometer System, Model 325 | Hutchinson Technology, Inc. | 2002 | — |
| −3 | K042020 | Spectra Tissue Spectrometer System (Inspectra) | Hutchinson Technology, Inc. | 2004 | — |
| −2 | K053618 | Inspectra Tissue Spectrometer System, Model 325 | Hutchinson Technology, Inc. | 2006 | — |
| −1 | K061619 | Inspectra STO2 Tissue Oxygenation Monitor | Hutchinson Technology, Inc. | 2006 | — |
| 0 (this device) | K100915 | Inspectra STO2 Tissue Oxygenation Monitor, Model 650 | Hutchinson Technology, Inc. | 2010 | — |
| +1 | K094030 | Fore-Sight Absolute Cerebral and Somatic Oximeter, MC 2000 Series, Models… | Cas Medical Systems, Inc. | 2010 | — |
| +2 | K112820 | Fore-Sight Absolute Tissue Oximeter | Cas Medical Systems, Inc. | 2012 | — |
| +3 | K133879 | Fore-Sight Elite Absolute Tissue Oximeter | Cas Medical Systems, Inc. | 2014 | — |
| +2 | K113215 | Model 7600 Regional Oximeter System with Equanox Technology | Nonin Medical, Inc. | 2012 | — |
| +3 | K143675 | FORE-SIGHT Elite Absolute Tissue Oximeter | Cas Medical Systems, Inc. | 2015 | 1 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2010 | 1 | 0 |
| 2011 | 1 | 0 |
| 2012 | 4 | 0 |
| 2013 | 2 | 0 |
| 2014 | 4 | 0 |
| 2015 | 2 | 0 |
| 2016 | 2 | 0 |
| 2017 | 1 | 0 |
| 2018 | 1 | 0 |
| 2019 | 3 | 0 |
| 2020 | 3 | 0 |
| 2021 | 7 | 0 |
| 2022 | 6 | 0 |
| 2023 | 8 | 0 |
| 2024 | 7 | 0 |
| 2025 | 6 | 0 |
| 2026 | 3 | 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 MUD? 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 MUD device
- #1 K223651 Cerebral Adaptive Index (CAI) Algorithmscore 19.8 · 29 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 |
|---|---|---|---|
| * | K061619 | Inspectra STO2 Tissue Oxygenation MonitorSummary page 1…2700 Identification of Equivalent Hutchinson Technology, Inc. - InSpectrai'm StO 2 Tissue Devices Oxygenation Monitor, Model 650 (K061619) Hutchinson Technology,lInc. - nSpectram Tissue Spectrometer… | 2006 |
| * | K053618 | Inspectra Tissue Spectrometer System, Model 325Summary page 1…650 (K061619) Hutchinson Technology,lInc. - nSpectram Tissue Spectrometer System, Model 325 (K053618) 3. Device Descri),tion The InSpectraTM' StO 2 Tissue Oxygenation Monitor ('Model 650'), is a lightweight and transportable sy… | 2006 |
What descends from it? (61)
See all 613 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 12 years and passes through 1 company; a new generation was cleared every 1.8 years on median.
- None of the 6 ancestors has a recall.
- Of its descendants, K094030 (Cas Medical Systems, Inc., 2010) has gone furthest, with 53 descendants of its own.
- 1 other device also cites its predicate K061619.
How does its category compare?
All MUD devicesMUD Oximeter, Tissue Saturation: FDA decisions, review times, recalls and adverse event reports over 20 years. 2010, this device’s year, is highlighted.
FDA decisions per year · MUD
2in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · MUD
124in 2024
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · MUD
1in 2023
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · MUD
131in 2025
MAUDE reports naming product code MUD, 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 | 4 | 72 | 0 | 2 |
| 2009 | 4 | 96 | 1 | 7 |
| 2010 | 4 | 59 | 0 | 1 |
| 2011 | 2 | — | 0 | 2 |
| 2012 | 6 | 211 | 0 | 3 |
| 2013 | 2 | — | 0 | 8 |
| 2014 | 5 | 109 | 0 | 4 |
| 2015 | 3 | 107 | 0 | 0 |
| 2016 | 4 | 167 | 0 | 9 |
| 2017 | 3 | 249 | 0 | 24 |
| 2018 | 3 | 128 | 0 | 38 |
| 2019 | 7 | 88 | 0 | 107 |
| 2020 | 2 | — | 0 | 50 |
| 2021 | 2 | — | 0 | 27 |
| 2022 | 2 | — | 2 | 52 |
| 2023 | 2 | — | 1 | 73 |
| 2024 | 5 | 124 | 0 | 140 |
| 2025 | 2 | — | 0 | 131 |
| 2026 | 1 | — | 1 | — |
What is it indicated for?
Hutchinson Technology Incorporated's InSpectra StO2 Tissue Oxygenation Monitor is intended for use as a non-invasive monitoring system that measures an approximated value of percent hemoglobin oxygen saturation in tissue (StO2).
The InSpectra StO2 Tissue, Oxygenation Monitor is indicated for use in monitoring patients during circulatory or perfusion examinations of skeletal muscle or when there is a suspicion of compromised circulation.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K100915 · printed Nov 6, 2026
Cite this page
510(k) Report. “K100915: Inspectra STO2 Tissue Oxygenation Monitor, Model 650.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K100915
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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