Search Results - "Placek, Michal M."

Compliance of the cerebrospinal space: comparison of three methods by Kazimierska, Agnieszka, Kasprowicz, Magdalena, Czosnyka, Marek, Placek, Michał M., Baledent, Olivier, Smielewski, Peter, Czosnyka, Zofia

“…Background Cerebrospinal compliance describes the ability of the cerebrospinal space to buffer changes in volume. Diminished compliance is associated with…”
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Applying time-frequency analysis to assess cerebral autoregulation during hypercapnia by Placek, Michał M, Wachel, Paweł, Iskander, D Robert, Smielewski, Peter, Uryga, Agnieszka, Mielczarek, Arkadiusz, Szczepański, Tomasz A, Kasprowicz, Magdalena

“…Classic methods for assessing cerebral autoregulation involve a transfer function analysis performed using the Fourier transform to quantify relationship…”
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The lower limit of reactivity as a potential individualised cerebral perfusion pressure target in traumatic brain injury: a CENTER-TBI high-resolution sub-study analysis by Beqiri, Erta, Zeiler, Frederick A, Ercole, Ari, Placek, Michal M, Tas, Jeanette, Donnelly, Joseph, Aries, Marcel J H, Hutchinson, Peter J, Menon, David, Stocchetti, Nino, Czosnyka, Marek, Smielewski, Peter

“…A previous retrospective single-centre study suggested that the percentage of time spent with cerebral perfusion pressure (CPP) below the individual lower…”
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Intracranial pulse pressure waveform analysis using the higher harmonics centroid by Zakrzewska, Agnieszka P., Placek, Michał M., Czosnyka, Marek, Kasprowicz, Magdalena, Lang, Erhard W.

“…Background The pulse waveform of intracranial pressure (ICP) is its distinctive feature almost always present in the clinical recordings. In most cases, it…”
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Can interhemispheric desynchronization of cerebral blood flow anticipate upcoming vasospasm in aneurysmal subarachnoid haemorrhage patients? by Placek, Michał M., Smielewski, Peter, Wachel, Paweł, Budohoski, Karol P., Czosnyka, Marek, Kasprowicz, Magdalena

“…•A non-invasive method for the cerebral blood flow asymmetry assessment is proposed.•The proposed method accounts for non-stationarity of analysed…”
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Studying Trends of Auto-Regulation in Severe Head Injury in Paediatrics (STARSHIP): protocol to study cerebral autoregulation in a prospective multicentre observational research database study by Agrawal, Shruti, Placek, Michal M, White, Deborah, Daubney, Esther, Cabeleira, Manuel, Smielewski, Peter, Czosnyka, Marek, Young, Adam, Watson, Suzanna, Maw, Anna, Hutchinson, Peter John

“…IntroductionStudying cerebral autoregulation, particularly PRx (Pressure Reactivity Index), is commonly employed in adult traumatic brain injury (TBI) and…”
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Using the entropy of the corneal pulse signal to distinguish healthy eyes from eyes affected by primary open-angle glaucoma by Danielewska, Monika E, Placek, Michał M, Kicińska, Aleksandra K, Rękas, Marek

“…The purpose of this study was to evaluate whether the complexity of the corneal pulse (CP) signal can be used to differentiate patients with primary open-angle…”
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Changes in spectral parameters of corneal pulse following canaloplasty by Danielewska, Monika E., Kicińska, Aleksandra K., Placek, Michał M., Lewczuk, Katarzyna, Rękas, Marek

“…Purpose To ascertain whether changes in the spectral content of the corneal pulse (CP) signal, measured in vivo in primary open-angle glaucoma (POAG) patients,…”
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Critical closing pressure during experimental intracranial hypertension: comparison of three calculation methods by Kaczmarska, Katarzyna, Uryga, Agnieszka, Placek, Michał M., Calviello, Leanne, Kasprowicz, Magdalena, Varsos, Georgios V., Czosnyka, Zofia, Koźniewska, Ewa, Sierzputowski, Tomasz, Koszewski, Waldemar, Czosnyka, Marek

“…Objectives: The critical closing pressure (CrCP) defines arterial blood pressure below which cerebral arteries collapse. It represents a clinically relevant…”
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Transmission of slow waves in Masimo O3 near infrared spectroscopy measures by Smith, Claudia A., Kazimierska, Agnieszka, Placek, Michał M., Beqiri, Erta, Karvandi, Elika, Czosnyka, Marek, Helmy, Adel, Smielewski, Peter

“…Cerebral autoregulation (CA) dysfunction is a key complication following brain injury. CA assessment using near-infrared spectroscopy (NIRS) offers a promising…”
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Change in Blood Flow Velocity Pulse Waveform during Plateau Waves of Intracranial Pressure by Sawicki, Karol, Placek, Michał M., Łysoń, Tomasz, Mariak, Zenon, Chrzanowski, Robert, Czosnyka, Marek

“…A reliable method for non-invasive detection of dangerous intracranial pressure (ICP) elevations is still unavailable. In this preliminary study, we…”
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Assessment of Baroreflex Sensitivity Using Time-Frequency Analysis during Postural Change and Hypercapnia by Burzyńska, Małgorzata, Wachel, Paweł, Uryga, Agnieszka, Placek, Michał M., Kazimierska, Agnieszka, Kasprowicz, Magdalena

“…Baroreflex is a mechanism of short-term neural control responsible for maintaining stable levels of arterial blood pressure (ABP) in an ABP-heart rate negative…”
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Exploration of uncertainty of PRx time trends by Beqiri, Erta, Placek, Michal M., Chu, Ka Hing, Donnelly, Joseph, Cucciolini, Giada, Motroni, Virginia, Smith, Claudia A., Czosnyka, Marek, Hutchinson, Peter, Smielewski, Peter

“…PRx can be used as surrogate measure of Cerebral Autoregulation (CA) in traumatic brain injury (TBI) patients. PRx can provide means for individualising…”
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Embracing uncertainty in cerebrospinal fluid dynamics: A Bayesian approach to analysing infusion studies by Chabros, Jeremi, Placek, Michal M., Chu, Ka Hing, Beqiri, Erta, Hutchinson, Peter J., Czosnyka, Zofia, Czosnyka, Marek, Joannides, Alexis, Smielewski, Peter

“…Cerebrospinal fluid (CSF) infusion test analysis allows recognizing and appropriately evaluating CSF dynamics in the context of normal pressure hydrocephalus…”
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Red solid line: Patterns of terminal loss of cerebrovascular reactivity at the bedside by Beqiri, Erta, Czosnyka, Marek, Placek, Michal M, Cucciolini, Giada, Motroni, Virginia, Smith, Claudia A, Hutchinson, Peter, Smielewski, Peter

“…Continuous monitoring of the pressure reactivity index (PRx) provides an estimation of dynamic cerebral autoregulation (CA) at the bedside in traumatic brain…”
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Phase shift between respiratory oscillations in cerebral blood flow velocity and arterial blood pressure by Uryga, Agnieszka, Placek, Michał M, Wachel, Paweł, Szczepański, Tomasz, Czosnyka, Marek, Kasprowicz, Magdalena

“…We aim to investigate whether phase shift between respiratory oscillations in cerebral blood flow velocity (CBFV) and arterial blood pressure (ABP) is…”
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Cerebral hemodynamic monitoring combined with infusion test in hydrocephalus by Czosnyka, Zofia, Lalou, Afroditi, Pelah, Adam I., Joanides, Alexis J., Smielewski, Peter, Placek, Michal M., Marek, Czosnyka

“…Disturbance in cerebrospinal fluid (CSF) circulation may overlap with abnormality of cerebral blood flow (CBF) in hydrocephalus. Transcranial Doppler (TCD)…”
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Association of transcranial Doppler blood flow velocity slow waves with delayed cerebral ischemia in patients suffering from subarachnoid hemorrhage: a retrospective study by Papaioannou, Vasilios E., Budohoski, Karol P., Placek, Michal M., Czosnyka, Zofia, Smielewski, Peter, Czosnyka, Marek

“…Background Cerebral vasospasm (VS) and delayed cerebral ischemia (DCI) constitute major complications following subarachnoid hemorrhage (SAH). A few studies…”
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Robotic Semi-Automated Transcranial Doppler Assessment of Cerebrovascular Autoregulation in Post-Concussion Syndrome: Methodological Considerations by Khan, Danyal Z., Placek, Michal M., Smielewski, Peter, Budohoski, Karol P., Anwar, Fahim, Hutchinson, Peter J.A., Bance, Manohar, Czosnyka, Marek, Helmy, Adel

“…Post-concussion syndrome (PCS) refers to a constellation of physical, cognitive, and emotional symptoms after traumatic brain injury (TBI). Despite its…”
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Relationship Between the Parameters of Corneal and Fundus Pulse Signals Acquired With a Combined Ultrasound and Laser Interferometry Technique by Danielewska, Monika E, Messner, Alina, Werkmeister, René M, Placek, Michał M, Aranha Dos Santos, Valentin, Rękas, Marek, Schmetterer, Leopold

“…To estimate the relationship between the characteristics of the corneal pulse (CP) signal and those of the fundus pulse (FP) signal measured with a combined…”
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