Noninvasive Prediction of Intracranial Pressure Curves Using Transcranial Doppler Ultrasonography and Blood Pressure Curves

Schmidt, Bernhard; Klingelhöfer, Jürgen; Schwarze, Jens; Sander, Dirk; Wittich, Ingo

doi:10.1161/01.str.28.12.2465

Cited by 109 publications

(67 citation statements)

References 26 publications

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“…A more complex method aimed at the non-invasive assessment of ICP has been introduced and tested by Schmidt et al 18 The method is based on the presumed linear transformation between arterial pressure and ICP waveforms. Coefficients of this transformation are derived from the database of real ABP and ICP recordings.…”

Section: Attempts To Measure Icp and Cpp Non-invasivelymentioning

confidence: 99%

Monitoring and interpretation of intracranial pressure

Czosnyka

Pickard²

2004

Journal of Neurology, Neurosurgery & Psychiatry

661

481

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Section: Attempts To Measure Icp and Cpp Non-invasivelymentioning

confidence: 99%

Monitoring and interpretation of intracranial pressure

Czosnyka

Pickard²

2004

Journal of Neurology, Neurosurgery & Psychiatry

661

481

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“…Using a mathematical model, Schmidt et al were able to predict ICP trends based on arterial blood pressure and CT computed tomography, ICP intracranial pressure flow velocity with a mean absolute difference of 4.0 ± 1.8 mmHg when compared to measured ICP. The above studies evaluated comatose or severely brain-injured patients with impaired cerebral autoregulation, where the PaCO 2 was held constant at 30-35 mmHg, limiting the generalizability of the findings [29]. Despite those limitations, in a series of 12 patients with severe head trauma, Goraj et al [30] were able to demonstrate a similar relationship between the RI and ICP trends, in patients with a PaCO 2 range of 20-34 mmHg.…”

Section: Transcranial Doppler Sonographymentioning

confidence: 99%

Non-invasive Methods of Estimating Intracranial Pressure

et al. 2011

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Non-invasive measurement of intracranial pressure can be invaluable in the management of critically ill patients. We performed a comprehensive review of the literature to evaluate the different methods of measuring intracranial pressure. Several methods have been employed to estimate intracranial pressure, including computed tomography, magnetic resonance imaging, transcranial Doppler sonography, near-infrared spectroscopy, and visual-evoked potentials. In addition, multiple techniques of measuring the optic nerve and the optic nerve sheath diameter have been studied. Ultrasound measurements of the optic nerve sheath diameter and Doppler flow are especially promising and may be useful in selected settings.

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“…Coupled with mathematical models, Schmidt et al [126] have presented algorithms to obtain non-invasive estimates of ICP from TCD recordings. In the same vein, the total power of the reflected Doppler signal has been used to derive estimates of absolute CBF and cerebral perfusion [6,40,118].…”

Section: Clinical Applications Of Tcdmentioning

confidence: 99%

Transcranial Doppler for evaluation of cerebral autoregulation

2009

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Transcranial Doppler ultrasound (TCD) can measure cerebral blood flow velocity in the main intracranial vessels non-invasively and with high accuracy. Combined with the availability of non-invasive devices for continuous measurement of arterial blood pressure, the relatively low cost, ease-of-use, and excellent temporal resolution of TCD have stimulated the development of new techniques to assess cerebral autoregulation in the laboratory or bedside using a dynamic approach, instead of the more classical 'static' method. Clinical applications have shown consistent results in certain conditions such as severe head injury and carotid artery disease. Studies in syncopal patients revealed a more complex pattern due to aetiological non-homogeneity and methodological limitations mainly due to inadequate sample-size. Different analytical models to quantify autoregulatory performance have also contributed to the diversity of results in the literature. The review concludes with specific recommendations for areas where further validation and research are needed to improve the reliability and usefulness of TCD in clinical practice.

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Noninvasive Prediction of Intracranial Pressure Curves Using Transcranial Doppler Ultrasonography and Blood Pressure Curves

Abstract: These results demonstrate that this method constitutes a promising step toward a noninvasive ICP prediction that may be clinically applicable under well-defined conditions.

Cited by 109 publications

References 26 publications

Monitoring and interpretation of intracranial pressure

Monitoring and interpretation of intracranial pressure

Non-invasive Methods of Estimating Intracranial Pressure

Transcranial Doppler for evaluation of cerebral autoregulation

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