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Your search keyword '"Czosnyka, M."' showing total 1,062 results
Start Over Author "Czosnyka, M." Publication Type Academic Journals
1,062 results on '"Czosnyka, M."'

2. Hybrid Method of Non-invasive Intracranial Pressure Measurement Using Autoencoder Neural Network Algorithm.

Author

BOHDANOWICZ, M., CARDIM, D., SCHMIDT, B., WADEHN, F., NAŁĘCZ, M., RUPNIEWSKI, M., KIM, D.-J., and CZOSNYKA, M.

Subjects
ARTIFICIAL neural networks, BIOMEDICAL signal processing, STANDARD deviations, AUTOENCODER, INTRACRANIAL pressure, CEREBRAL circulation
Abstract

Both short-term and long-term intracranial pressure (ICP) monitoring is indicated for a number of neurological pathologies. The clinical gold standard for ICP monitoring is invasive and involves inserting a pressure sensor into the brain tissue or cerebral spinal fluid space. Such sensors can only be used for a limited time due to the risk of infection and sensor degradation. Our aim was to develop a method for long-term non-invasive ICP monitoring after the removal of invasive ICP sensor. Arterial blood pressure (ABP) and cerebral blood flow velocity (FV) signals were used as inputs to an artificial autoencoder neural network. The network was trained with invasively measured ICP. Following the training phase, the network's outputs were used for estimating ICP based on ABP and FV only. The method was verified on clinical data from 98 traumatic brain injury patients. The proposed procedure managed to recover ICP using FV and ABP measurements. The median value of the Pearson correlation between the recovered and the reference ICP signals was 0.7, and the root mean square error was 3.9 mmHg with an interquartile range of less than 5 mmHg. An additional feature of our algorithm is that it not only outputs an ICP estimate, but also provides a confidence level. [ABSTRACT FROM AUTHOR]

Published
2024
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33. Asymmetry of critical closing pressure following head injury

Author

Kumar, A., Schmidt, E.A., Hiler, M., Smielewski, P., Pickard, J.D., and Czosnyka, M.

Subjects
Head injuries -- Patient outcomes, Head injuries -- Physiological aspects, Intracranial pressure -- Analysis, Health, Psychology and mental health
Published
2005

36. Cerebrovascular pressure reactivity is related to global cerebral oxygen metabolism after head injury. (Paper)

Author

Steiner, L.A., Coles, J.P., Czosnyka, M., Minhas, P.S., Fryer, T.D., Aigbirhio, F.I., Clark, J.C., Smielewski, P, Chatfield, D.A., Donovan, T., Pickard, J.D., and Menon, D.K.

Subjects
Oxygen -- Physiological transport, PET imaging -- Usage -- Physiological aspects, Head injuries -- Physiological aspects -- Usage, Cerebral circulation -- Physiological aspects -- Usage, Health, Psychology and mental health, Usage, Physiological aspects
Abstract

Background: After head injury, impaired cerebrovascular autoregulation has been associated with abnormally high or low cerebral blood flow. The physiological relevance of cerebral blood flow levels is difficult to assess [...]

Published
2003

38. Continuous monitoring of cerebrovascular autoregulation: a validation study. (Paper)

Author

Lang, E.W., Mehdorn, H.M., Dorsch, N.W.C., and Czosnyka, M.

Subjects
Brain -- Injuries, Patient monitoring -- Evaluation -- Measurement, Cerebral circulation -- Measurement, Health, Psychology and mental health, Evaluation, Measurement, Injuries
Abstract

Background: Continuous monitoring of dynamic cerebral autoregulation, using a moving correlation index of cerebral perfusion pressure and mean middle cerebral artery flow velocity, may be useful in patients with severe [...]

Published
2002

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