510(k) · Cleared
ClearedInpectra STO2 Spot Check
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 Mar 2, 2011 as substantially equivalent to K100915 (Hutchinson Technology, Inc., 2010) after an 83-day review. Its family tree reaches back 7 generations to 1998. 5 later devices descend from it.
- Decided
- Mar 2, 2011
- Review
- 83 days
- Class
- Class II
- Product code
- MUD
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 7 generations to K963903 (1998). 5 later devices descend from it, 1 citing it directly.
- Root · 7 generations backK963903 Biospectrometer-NB Oximeter IiiiHutchinson Technology, Inc. · 1998
- 6 generations backK012759 Inspectra Tissue Spectrometer System (Inspectra), Model 325Hutchinson Technology, Inc. · 2002
- 5 generations backK023938 Modification to Inspectra Tissue Spectrometer System, Model 325Hutchinson Technology, Inc. · 2002
- 4 generations backK042020 Spectra Tissue Spectrometer System (Inspectra)Hutchinson Technology, Inc. · 2004
- 3 generations backK053618 Inspectra Tissue Spectrometer System, Model 325Hutchinson Technology, Inc. · 2006
- 2 generations backK061619 Inspectra STO2 Tissue Oxygenation MonitorHutchinson Technology, Inc. · 2006
- 1 generation backK100915 Inspectra STO2 Tissue Oxygenation Monitor, Model 650Hutchinson Technology, Inc. · 2010
- This deviceK103613 Inpectra STO2 Spot CheckHutchinson Technology, Inc. · 2011
- Descendant · cites it directly · 4 of its ownK113656 Careguide OximeterReflectance Medical, Inc. · 2012
- Descendant · 2 generations on · 3 of its ownK122645 Mobile Careguide 2100 OximeterReflectance Medical, Inc. · 2012
- Descendant · 2 generations on · 2 of its ownK130079 Multi-Parameter Mobile Careguide 3100 OximeterReflectance Medical, Inc. · 2013
- Descendant · 2 generations on · 1 of its ownK133923 Multi-Parameter Mobile Careguide 3100 Oximeter with TabletReflectance Medical, Inc. · 2014
- Descendant · 2 generations on · 0 of its ownK141496 Multi-Parameter Mobile Careguide 4100 OximeterReflectance Medical, Inc. · 2014
Most influential descendants
Showing 5 of 5 · See all- K113656Careguide OximeterReflectance Medical, Inc. · 2012 · cites it directly4descendants
- K122645Mobile Careguide 2100 OximeterReflectance Medical, Inc. · 2012 · 2 generations on3descendants
- K130079Multi-Parameter Mobile Careguide 3100 OximeterReflectance Medical, Inc. · 2013 · 2 generations on2descendants
- K133923Multi-Parameter Mobile Careguide 3100 Oximeter with TabletReflectance Medical, Inc. · 2014 · 2 generations on1descendant
- K141496Multi-Parameter Mobile Careguide 4100 OximeterReflectance Medical, Inc. · 2014 · 2 generations on0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −7 | K963903 | Biospectrometer-NB Oximeter Iiii | Hutchinson Technology, Inc. | 1998 | — |
| −6 | K012759 | Inspectra Tissue Spectrometer System (Inspectra), Model 325 | Hutchinson Technology, Inc. | 2002 | — |
| −5 | K023938 | Modification to Inspectra Tissue Spectrometer System, Model 325 | Hutchinson Technology, Inc. | 2002 | — |
| −4 | K042020 | Spectra Tissue Spectrometer System (Inspectra) | Hutchinson Technology, Inc. | 2004 | — |
| −3 | K053618 | Inspectra Tissue Spectrometer System, Model 325 | Hutchinson Technology, Inc. | 2006 | — |
| −2 | K061619 | Inspectra STO2 Tissue Oxygenation Monitor | Hutchinson Technology, Inc. | 2006 | — |
| −1 | K100915 | Inspectra STO2 Tissue Oxygenation Monitor, Model 650 | Hutchinson Technology, Inc. | 2010 | — |
| 0 (this device) | K103613 | Inpectra STO2 Spot Check | Hutchinson Technology, Inc. | 2011 | — |
| +1 | K113656 | Careguide Oximeter | Reflectance Medical, Inc. | 2012 | — |
| +2 | K122645 | Mobile Careguide 2100 Oximeter | Reflectance Medical, Inc. | 2012 | — |
| +2 | K130079 | Multi-Parameter Mobile Careguide 3100 Oximeter | Reflectance Medical, Inc. | 2013 | — |
| +2 | K133923 | Multi-Parameter Mobile Careguide 3100 Oximeter with Tablet | Reflectance Medical, Inc. | 2014 | — |
| +2 | K141496 | Multi-Parameter Mobile Careguide 4100 Oximeter | Reflectance Medical, Inc. | 2014 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2012 | 2 | 0 |
| 2013 | 1 | 0 |
| 2014 | 2 | 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? (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 |
|---|---|---|---|
| * | K100915 | Inspectra STO2 Tissue Oxygenation Monitor, Model 650Summary page 1…MUD Classification Panel: 74 (Cardiovascular) CFR Reference: 2ICFR§870.2700 3. Identification of Substantially Equivalent Device K 100915: Hutchinson Technology Inc., RioMeasurement Division - lnSpectraTm St0 2 Tissue Oxygenation Monitor System (Model 650 and acce… | 2010 |
What descends from it? (5)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K113656 | Careguide Oximeter | 2012 | 4 |
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 13 years and passes through 1 company; a new generation was cleared every 1.4 years on median.
- None of the 7 ancestors has a recall.
- Of its descendants, K113656 (Reflectance Medical, Inc., 2012) has gone furthest, with 4 descendants of its own.
- 2 other devices also cite its predicate K100915.
How does its category compare?
All MUD devicesMUD Oximeter, Tissue Saturation: FDA decisions, review times, recalls and adverse event reports over 20 years. 2011, 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 Spot Check is intended for use as a non-invasive monitoring system that measures an approximated value of percent hemoglobin oxygen saturation in thenar skeletal muscle tissue (StO₂).
The InSpectra StO₂ Spot Check is indicated for use in monitoring patients during circulatory or perfusion examinations or when there is a suspicion of compromised circulation of thenar skeletal muscle.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K103613 · printed Nov 6, 2026
Cite this page
510(k) Report. “K103613: Inpectra STO2 Spot Check.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K103613
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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