Repeated sensor use for regional cerebral oxygenation measurements by near-infrared spectroscopy: A technical report

Paolo Ancon, Christopher T. Eyeington, Salvatore L. Cutuli, Neil J. Glassford, Glenn M. Eastwood, Rinaldo Bellomo

Research output: Contribution to journalComment / DebateResearchpeer-review

1 Citation (Scopus)


Objective: Near-infrared spectroscopy (NIRS) has been used in clinical practice to assess regional cerebral tissue oxygen saturation (StcO2). There is no evidence whether repeated use of the same sensor affects StcO2measurements. We aimed to assess whether there was a signifi cant systematic decrease or increase in StcO2when NIRS sensors were reused. Design: Participants were divided into three groups (A, B and C). StcO2was recorded over 5 minutes daily for 5 days in Groups A and B (“new-sensor” [NS] period; sensor age, 1-5 days) and in Groups A and C, with the sensor previously used for A (“extended-use” [EU] period; sensor age, 6-10 days). Setting: Single-centre, university hospital, intensive care unit. Participants: Healthy volunteers. Main outcome measures: StcO2change within and between study periods. Results: In 13 participants (9 male; median age, 30 years), the range of median StcO2values per day was 65-72%. In the NS period, there were no changes in right-sided StcO2,and left-sided StcO2showed no systematic or progressive patterns of increase or decrease when comparing Day 1 with subsequent days. There were no differences when comparing Day 1 with subsequent days (up to Day 10) in the EU period or between the NS and EU periods for left or right StcO2. Conclusions: Repeated use of NIRS sensors measured StcO2in different individuals for up to 10 days. There were no signifi cant, systematic, persistent or progressive changes in StcO2with extended use over time. Our fi ndings suggest that StcO2 does not change with sensor reuse for up to 10 days.

Original languageEnglish
Pages (from-to)164-167
Number of pages4
JournalCritical Care and Resuscitation
Issue number2
Publication statusPublished - 1 Jun 2018

Cite this