A comparison of the time constant of the cerebral arterial bed using invasive and non-invasive arterial blood pressure measurements

Uryga, Agnieszka; Kaczmarska, Katarzyna; Burzyńska, Małgorzata; Czosnyka, Marek; Kasprowicz, Magdalena

doi:10.1088/1361-6579/ab9bb6

Cited by 1 publication

(1 citation statement)

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“…For critically ill patients, IBP should be the preferred method for dCA assessment ( 22 ). However, some contraindications exist for IBP ( 25 ), such as local infections, coagulopathy, Raynaud syndrome, Buerger's disease or surgical considerations ( 26 ). Moreover, the main complication of IBP is the temporary occlusion of the artery, while serious ischemic damage leading to necrosis and the amputation of fingers or the whole hand is also observed on rare occasions ( 27 ).…”

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confidence: 99%

The consistency of invasive and non-invasive arterial blood pressure for the assessment of dynamic cerebral autoregulation in NICU patients

Zhang

Lu²,

Liu³

et al. 2022

Front. Neurol.

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BackgroundStudies of the clinical application of dynamic cerebral autoregulation show considerable variations, and differences in blood pressure devices may be one of the reasons for this variation. Few studies have examined the consistency of invasive and non-invasive arterial blood pressure for evaluating cerebral autoregulation. We attempted to investigate the agreement between invasive and non-invasive blood pressure methods in the assessment of dynamic cerebral autoregulation with transfer function analysis.MethodsContinuous cerebral blood flow velocity and continuous invasive and non-invasive arterial blood pressure were simultaneously recorded for 15 min. Transfer function analysis was applied to derive the phase shift, gain and coherence function at all frequency bands from the first 5, 10, and 15 min of the 15-min recordings. The consistency was assessed with Bland–Altman analysis and intraclass correlation coefficient.ResultsThe consistency of invasive and noninvasive blood pressure methods for the assessment of dynamic cerebral autoregulation was poor at 5 min, slightly improved at 10 min, and good at 15 min. The values of the phase shift at the low-frequency band measured by the non-invasive device were higher than those measured with invasive equipment. The coherence function values measured by the invasive technique were higher than the values derived from the non-invasive method.ConclusionBoth invasive and non-invasive arterial blood pressure methods have good agreement in evaluating dynamic cerebral autoregulation when the recording duration reaches 15 min. The phase shift values measured with non-invasive techniques are higher than those measured with invasive devices. We recommend selecting the most appropriate blood pressure device to measure cerebral autoregulation based on the disease, purpose, and design.

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