Influence of ambient light on cerebral oximeters

Zaouter, Cédrick; Arbeid, Erik

doi:10.1093/bja/aeq330

Cited by 15 publications

(14 citation statements)

References 2 publications

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“…The proportion of pre-hospital time with successful monitoring (>70%) was 71.4% (45 of 63) for all three sensors, with at least two sensors functional in 90.4% (57 of 63). The median (interquartile range) scene time was 19 (11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23) minutes in patients with NIRS monitoring compared to 18 (11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27) minutes without NIRS monitoring (P = .570). There was no difference in the median (interquartile range) total pre-hospital time between patients with or without monitoring sensors (72 [59-89] versus 72 [59-80] minutes; P = .605).…”

Section: Resultsmentioning

confidence: 98%

“…For time spent at the scene, there was no difference between the three patient groups (Table 1); patients with or without NIRS monitoring also had similar scene times (P = .570). In the sensitivity analysis, the median (IQR) scene time for those with sensors applied who met the inclusion criteria (n = 53) was 19 (13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23) with no difference between patients with and without NIRS monitoring (P = .867). For total pre-hospital time, there was no difference between the three patient groups (Table 1); patients with or without NIRS monitoring also had similar total pre-hospital time (P = .605).…”

Section: Re Sultsmentioning

confidence: 99%

“…[19][20][21] With extracranial contamination and ambient light in an operating theatre environment previously highlighted as potential issues, the demonstration that outdoor ambient light does not preclude monitoring is reassuring. 22,23 The goal of NIRS monitoring should be to provide information that responds accurately enough to evolving changes in physiology to allow clinicians to make meaningful changes to their care and produce better patient outcomes. This relies on a consistent monitoring signal.…”

Section: Feasibility Of Nirs Oximetry For Clinical Application In Tmentioning

confidence: 99%

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Near‐infrared spectroscopy monitoring in a pre‐hospital trauma patient cohort: An analysis of successful signal collection

Weatherall

Poynter²,

Garner³

et al. 2019

Acta Anaesthesiol Scand

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A primary aim of managing critically injured patients is the maintenance of perfusion to vital organs, particularly the brain.Discussion of traumatic brain injury (TBI) management frequently focuses on hospital care but the pre-hospital phase, even in urban areas of Australia, is often more than one hour. Delivery of nutrients to the brain is no less vital during this period than during the hospital admission to prevent the deleterious effects of secondary brain injury.TBI is a significant cause of morbidity and mortality with younger age groups most commonly affected. In TBI survivors, almost 50% have permanent deficits causing at least moderate disability. 1 Such disability can be present in up to 43% of patients up to 20 years after their injury. 1 With estimates that patients suffering TBI add $8.6 billion per year to the costs of health care in Australia, there is a clear rationale for pursuing optimal TBI management. 2

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Section: Resultsmentioning

confidence: 98%

Section: Re Sultsmentioning

confidence: 99%

Section: Feasibility Of Nirs Oximetry For Clinical Application In Tmentioning

confidence: 99%

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Near‐infrared spectroscopy monitoring in a pre‐hospital trauma patient cohort: An analysis of successful signal collection

Weatherall

Poynter²,

Garner³

et al. 2019

Acta Anaesthesiol Scand

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“…26 An advantage of tissue oximeters that give absolute values rather than monitoring relative change is that there is no need for baseline calibration. 27 NIRS manufacturers apply empirical calibration coefficients based upon clinical and optical phantom data. NIRS tissue oxygen saturation values are then related to the calibration reference as determined from the weighted venous and arterial oxygen saturations (75∕25 for INVOS and 70∕30 for FORE-SIGHT).…”

Section: Discussionmentioning

confidence: 99%

Comparison of cerebral tissue oxygenation values in full term and preterm newborns by the simultaneous use of two near-infrared spectroscopy devices: an absolute and a relative trending oximeter

et al. 2013

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The aim of this study is to compare a two-wavelength light emitting diode-based tissue oximeter (INVOS), which is designed to show trends in tissue oxygenation, with a four-wavelength laser-based oximeter (FORE-SIGHT), designed to deliver absolute values of tissue oxygenation. Simultaneous values of cerebral tissue oxygenation (StO2) are measured using both devices in 15 term and 15 preterm clinically stable newborns on the first and third day of life. Values are recorded simultaneously in two periods between which oximeter sensor positions are switched to the contralateral side. Agreement between StO2 values before and after the change of sensor position is analyzed. We find that mean cerebral StO2 values are similar between devices for term and preterm babies, but INVOS shows StO2 values spread over a wider range, with wider standard deviations than shown by the FORE-SIGHT. There is relatively good agreement with a bias up to 3.5% and limits of agreement up to 11.8%. Measurements from each side of the forehead show better repeatability for the FORE-SIGHT monitor. We conclude that performance of the two devices is probably acceptable for clinical purposes. Both performed sufficiently well, but the use of FORE-SIGHT may be associated with tighter range and better repeatability of data.

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“…Relative oximeters emit two (730 and 810 nm, INVOS) or three (730, 810, and 880 nm, NONIN) wavelengths of LED. Zouter and Arbeid [8] found that absolute oximetry was not influenced by ambient light but relative oximetry is. Based on personal out-of-hospital clinical experience absolute oximetry (FORE-SIGHT) is also influenced by ambient light and the sensors need to be covered.…”

Section: Near-infrared Spectroscopymentioning

confidence: 98%

Near-infrared spectroscopy during cardiopulmonary resuscitation and after restoration of spontaneous circulation

Wik

2016

Current Opinion in Critical Care

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Influence of ambient light on cerebral oximeters

Cited by 15 publications

References 2 publications

Near‐infrared spectroscopy monitoring in a pre‐hospital trauma patient cohort: An analysis of successful signal collection

Near‐infrared spectroscopy monitoring in a pre‐hospital trauma patient cohort: An analysis of successful signal collection

Comparison of cerebral tissue oxygenation values in full term and preterm newborns by the simultaneous use of two near-infrared spectroscopy devices: an absolute and a relative trending oximeter

Near-infrared spectroscopy during cardiopulmonary resuscitation and after restoration of spontaneous circulation

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