510(k) · Cleared
ClearedSpectra Tissue Spectrometer System (Inspectra)
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 Sep 15, 2004 as substantially equivalent to K012759 (Hutchinson Technology, Inc., 2002) and 1 other predicate after a 50-day review. Its family tree reaches back 3 generations to 1998. 76 later devices descend from it.
- Decided
- Sep 15, 2004
- Review
- 50 days
- Class
- Class II
- Product code
- MUD
- Recalls
- None
- Predicates
- 2
Its longest line of descent runs back 3 generations to K963903 (1998). 76 later devices descend from it, 2 citing it directly.
- Root · 3 generations backK963903 Biospectrometer-NB Oximeter IiiiHutchinson Technology, Inc. · 1998
- 2 generations backK012759 Inspectra Tissue Spectrometer System (Inspectra), Model 325Hutchinson Technology, Inc. · 2002
- 1 generation backK023938 Modification to Inspectra Tissue Spectrometer System, Model 325Hutchinson Technology, Inc. · 2002
- This deviceK042020 Spectra Tissue Spectrometer System (Inspectra)Hutchinson Technology, Inc. · 2004
- Descendant · cites it directly · 75 of its ownK053618 Inspectra Tissue Spectrometer System, Model 325Hutchinson Technology, Inc. · 2006
- Descendant · 2 generations on · 64 of its ownK061619 Inspectra STO2 Tissue Oxygenation MonitorHutchinson Technology, Inc. · 2006
- Descendant · 2 generations on · 61 of its ownK100915 Inspectra STO2 Tissue Oxygenation Monitor, Model 650Hutchinson Technology, Inc. · 2010
- Descendant · 3 generations on · 53 of its ownK094030 Fore-Sight Absolute Cerebral and Somatic Oximeter, MC 2000 Series…Cas Medical Systems, Inc. · 2010
- Descendant · 4 generations on · 47 of its ownK112820 Fore-Sight Absolute Tissue OximeterCas Medical Systems, Inc. · 2012
Showing 5 of 76 descendants. See all descendants
Descendants cleared per year
Most influential descendants
Showing 5 of 76 · See all- K053618Inspectra Tissue Spectrometer System, Model 325Hutchinson Technology, Inc. · 2006 · cites it directly75descendants
- K061619Inspectra STO2 Tissue Oxygenation MonitorHutchinson Technology, Inc. · 2006 · 2 generations on64descendants
- K100915Inspectra STO2 Tissue Oxygenation Monitor, Model 650Hutchinson Technology, Inc. · 2010 · 2 generations on61descendants
- K094030Fore-Sight Absolute Cerebral and Somatic Oximeter, MC 2000 Series, Models MC2000…Cas Medical Systems, Inc. · 2010 · 3 generations on53descendants
- K112820Fore-Sight Absolute Tissue OximeterCas Medical Systems, Inc. · 2012 · 4 generations on47descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −3 | K963903 | Biospectrometer-NB Oximeter Iiii | Hutchinson Technology, Inc. | 1998 | — |
| −2 | K012759 | Inspectra Tissue Spectrometer System (Inspectra), Model 325 | Hutchinson Technology, Inc. | 2002 | — |
| −1 | K023938 | Modification to Inspectra Tissue Spectrometer System, Model 325 | Hutchinson Technology, Inc. | 2002 | — |
| 0 (this device) | K042020 | Spectra Tissue Spectrometer System (Inspectra) | Hutchinson Technology, Inc. | 2004 | — |
| +1 | K053618 | Inspectra Tissue Spectrometer System, Model 325 | Hutchinson Technology, Inc. | 2006 | — |
| +2 | K061619 | Inspectra STO2 Tissue Oxygenation Monitor | Hutchinson Technology, Inc. | 2006 | — |
| +2 | K100915 | Inspectra STO2 Tissue Oxygenation Monitor, Model 650 | Hutchinson Technology, Inc. | 2010 | — |
| +3 | K094030 | Fore-Sight Absolute Cerebral and Somatic Oximeter, MC 2000 Series, Models… | Cas Medical Systems, Inc. | 2010 | — |
| +4 | K112820 | Fore-Sight Absolute Tissue Oximeter | Cas Medical Systems, Inc. | 2012 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2006 | 3 | 0 |
| 2008 | 2 | 0 |
| 2010 | 3 | 0 |
| 2011 | 1 | 0 |
| 2012 | 5 | 0 |
| 2013 | 2 | 0 |
| 2014 | 4 | 0 |
| 2015 | 2 | 0 |
| 2016 | 4 | 0 |
| 2017 | 2 | 0 |
| 2018 | 3 | 0 |
| 2019 | 3 | 0 |
| 2020 | 4 | 0 |
| 2021 | 7 | 0 |
| 2022 | 6 | 0 |
| 2023 | 8 | 0 |
| 2024 | 7 | 0 |
| 2025 | 6 | 0 |
| 2026 | 4 | 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 |
|---|---|---|---|
| * | K012759 | Inspectra Tissue Spectrometer System (Inspectra), Model 325Summary page 1…74 MUD Predicate Device: InSpectra TM Tissue Spectrometer System, Model 325 by Hutchinson Technology Inc. (K012759) and (K023938) Description: This premarket notification (510(K) Notification) is submitted to obtain… | 2002 |
| * | K023938 | Modification to Inspectra Tissue Spectrometer System, Model 325Summary page 1…74 MUD Predicate Device: InSpectra TM Tissue Spectrometer System, Model 325 by Hutchinson Technology Inc. (K012759) and (K023938) Description: This premarket notification (510(K) Notification) is submitted to obtain… | 2002 |
What descends from it? (76)
See all 762 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 6 years and passes through 1 company; a new generation was cleared every 1.8 years on median.
- None of the 3 ancestors has a recall.
- Of its descendants, K053618 (Hutchinson Technology, Inc., 2006) has gone furthest, with 75 descendants of its own.
- 4 other devices also cite its predicate K012759.
How does its category compare?
All MUD devicesMUD Oximeter, Tissue Saturation: FDA decisions, review times, recalls and adverse event reports over 20 years.
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 InSpectraTM Tissue Spectrometer System, Model 325, is a non-invasive monitoring system that measures an approximated value of percent hemoglobin oxygen saturation in tissue (PtO 2)
The InSpectra TM Tissue Spectrometer is indicated for use in monitoring patients during circulatory or perfusion examinations of skeletal muscle or when there is a suspicion of compromised circulation.
The InSpectra TM Tissue Spectrometer System is intended to noninvasively and continuously measure hemoglobin oxygen saturation: in the upper extremity, shoulder, or lower extremity.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K042020 · printed Nov 6, 2026
Cite this page
510(k) Report. “K042020: Spectra Tissue Spectrometer System (Inspectra).” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K042020
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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