Measurement of regional cerebrovascular haemoglobin oxygen saturation in cats using optical spectroscopy

McCormick, Patrick W.; Stewart, Melville; Ray, Patricia; Lewis, Gary D.; Dujovny, Manuel; Ausman, James I.

doi:10.1080/01616412.1991.11739967

Cited by 42 publications

(8 citation statements)

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“…A disposable sensor was applied to the patient's forehead . Light emitted from the diodes is used to calculate the frontal cortical hemoglobin concentration; resulting values represent cerebral arteriovenous saturation (normal range 60% to 80%) …”

Section: Methodssupporting

confidence: 81%

“…14 Light emitted from the diodes is used to calculate the frontal cortical hemoglobin concentration; resulting values represent cerebral arteriovenous saturation (normal range 60% to 80%). 15 The near infrared spectroscopy device did not interfere with CPR efforts or post-arrest interventions and was not used by medical staff to alter management. The forehead sensor was placed as soon as possible after onset of resuscitation efforts (2 minutes or less in all patients), and monitoring was continued up to 48 hours post-arrest unless removed for clinical reasons or patient death.…”

Section: Study Interventionmentioning

confidence: 99%

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Cerebral Oximetry as a Real‐Time Monitoring Tool to Assess Quality of In‐Hospital Cardiopulmonary Resuscitation and Post Cardiac Arrest Care

Ibrahim

Trammell

Austin

et al. 2015

JAHA

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BackgroundRegional cerebral oxygen saturation (rSO2) as assessed by near infrared frontal cerebral spectroscopy decreases in circulatory arrest and increases with high-quality cardiopulmonary resuscitation. We hypothesized that higher rSO2 during cardiopulmonary resuscitation and after return of spontaneous circulation (ROSC) would predict survival to discharge and neurological recovery.Methods and ResultsThis prospective case series included patients experiencing in-hospital cardiac arrest. Cerebral oximetry was recorded continuously from initiation of resuscitation until ROSC and up to 48 hours post-arrest. Relationships between oximetry data during these time periods and outcomes of resuscitation survival and survival to discharge were analyzed. The cohort included 27 patients. Nineteen (70.3%) achieved ROSC, and 8 (29.6%) survived to discharge. Median arrest duration was 20.8 minutes (range =8 to 74). There was a significant difference in rSO2 between resuscitation survivors and resuscitation nonsurvivors at initiation of the resuscitative efforts (35% versus 17.5%, P =0.03) and during resuscitation (36% versus 15%, P =0.0008). No significant association was observed between rSO2 at ROSC or during the post-arrest period and survival to discharge. Among patients who survived to discharge, there was no association between cerebral performance category and rSO2 at ROSC, during resuscitation, or post-arrest.ConclusionsHigher rSO2 levels at initiation of resuscitation and during resuscitation are associated with resuscitation survival and may reflect high-quality cardiopulmonary resuscitation. However, in this small series, rSO2 was not predictive of good neurological outcome. Larger studies are needed to determine whether this monitoring modality can be used to improve clinical outcomes.

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Section: Methodssupporting

confidence: 81%

Section: Study Interventionmentioning

confidence: 99%

Cerebral Oximetry as a Real‐Time Monitoring Tool to Assess Quality of In‐Hospital Cardiopulmonary Resuscitation and Post Cardiac Arrest Care

Ibrahim

Trammell

Austin

et al. 2015

JAHA

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“…In their investigation they found a signi® cant correlation between rSO 2 and changes in the electroencephalograph due to hypoxaemia, as well as good correlation with jugular bulb samples. 2,3,8,11 In sharp contrast to this, Harris and Bailey pointed out that the rSO 2 does not re¯ect cerebral oxygenation, but¯ow in the external carotid artery. 5 A similar correlation was published by Germon et al 4 In their study, they measured the cerebral oxygenation under a stable systemic condition in healthy volunteers.…”

Section: Discussionmentioning

confidence: 90%

Patients with increased intracranial pressure cannot be monitored using near infrared spectroscopy

Muellner¹,

Schramm²,

Kwasny³

et al. 1998

British Journal of Neurosurgery

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The hypothesis of this study was that with near infrared spectroscopy a decrease of the regional cerebral saturation would be detectable in patients with increased intracranial pressure. For this purpose, two study groups were compared: (A) eight healthy volunteers and (B) eight heart beating organ donors with brain stem herniation. The regional cerebral saturation was measured according to the developer's suggestions. Mean arterial pressure and peripheral pulse oximetry were recorded. The statistical comparison, using the unpaired t-test, revealed no significant differences for the regional cerebral saturation (p = 0.97) or for the mean arterial pressure or peripheral pulse oximetry between the groups. In both of the studied situations, no differences in the regional cerebral situation were detectable, even though the patient situations were completely antagonistic. Therefore, it is reasonable to discourage the use of the INVOS 3100 Cerebral Oxymeter to monitor patients with increased intracranial pressure indirectly.

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“…Using specific algorithms, the hemoglobin saturation in the frontal cortex is calculated (8)(9)(10)(11). We conducted an observational study in a convenience sample of 34 adult patients (age > 21) who underwent in-hospital cardiac arrest resuscitation during a 1-year clinical evaluation period.…”

Section: Methodsmentioning

confidence: 99%

A Feasibility Study of Cerebral Oximetry During In-Hospital Mechanical and Manual Cardiopulmonary Resuscitation*

Parnia¹,

Nasir²,

Ahn³

et al. 2014

Critical Care Medicine

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Measurement of regional cerebrovascular haemoglobin oxygen saturation in cats using optical spectroscopy

Cited by 42 publications

References 0 publications

Cerebral Oximetry as a Real‐Time Monitoring Tool to Assess Quality of In‐Hospital Cardiopulmonary Resuscitation and Post Cardiac Arrest Care

Cerebral Oximetry as a Real‐Time Monitoring Tool to Assess Quality of In‐Hospital Cardiopulmonary Resuscitation and Post Cardiac Arrest Care

Patients with increased intracranial pressure cannot be monitored using near infrared spectroscopy

A Feasibility Study of Cerebral Oximetry During In-Hospital Mechanical and Manual Cardiopulmonary Resuscitation*

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