Active clinical trials for "Intracranial Hypertension"

The new Integra CereLink ICP monitor integrate the possibility of recording and displaying continuously the AUC (Pressure Time Dose, PTD) and other ICP derived variables and provide the possibility of evaluating the utility of this information at the bedside. It offers the opportunity to test in a standardized way the clinical value of the PTD computation in this setting. Therefore, this study aims to test clinically if PTD recorded continuously is associated to patients' outcome and to identify a threshold of PTD associated with the transition from good to negative outcomes.

Rheoencephalography (REG) shows promise as a method for noninvasive neuromonitoring, because it reflects cerebrovascular reactivity. This protocol will study clinical and technical conditions required to use REG. Additionally, our goal is to study noninvasive peripheral bioimpedance pulse waveforms in order to substitute invasive SAP. A previous study demonstrated that REG can be used to detect spreading depolarization (SD), the early sign of brain metabolic disturbance. SD can be measured invasively with DC EEG amplifiers only. Our goal is to create an automatic notification function for REG monitoring indicating change of clinical conditions.

The purpose of this project is to determine during moderate rise of intracranial pressure (ICP) in awake patient, the change in autonomic function and its influence on cerebral and systemic haemodynamics.

Following current standard-of-care, subjects data (brain pressure) will be recorded for 1 hour and include 10-minutes of data during which the subject recieves chest physiotherapy (CPT). The hypothesis is that CPT is not harmful to brain pressure.

Direct laryngoscopy and tracheal intubation are associated with increases in intraocular pressure (IOP), intracranial pressure (ICP), heart rate (HR), and blood pressure. The use of supraglottic airway devices (SADs) are known to be beneficial in overcoming the disadvantages of laryngoscopy and tracheal intubation, especially ocular and pressure stress responses. In recent years, it has been reported that ultrasonographic measurement of optic nerve sheath diameter (ONSD) can be used in the diagnosis of increased ICP. The aim of our study is to compare the effects of Proseal laryngeal mask airway (pLMA), Suprem laryngeal mask airway (sLMA) and I-gel on hemodynamic response and ONSD during insertion in adult patients.

Osmotherapy with mannitol has been a common practice in patients with raised ICP. Monitoring its effect on ICP can be performed invasively and non-invasively. Due to a validated correlation between invasive ICP monitoring and ONSD measurement, it can be a tool to monitor acute and long term effects of osmotherapy non-invasively on ICP. This study examines the acute changes in sonographically measured ONSD brought about by the administration of mannitol. This can correlate with the changes in ICP in such patients and can be utilized as a tool for decision making/ point-of-care utility.

Several recent studies point to the possibility of the new coronavirus (SARS-Cov2), which currently causes pandemic COVID-19, to infiltrate the central nervous system (CNS) and cause primary damage to neural tissues, increasing the morbidity and mortality of these patients. A pathophysiological hypothesis for insulting the CNS would be the impairment of cerebral compliance (CC), because elevation of intracranial pressure (ICP), but due to the invasive nature of the methods available for ICP evaluation, this hypothesis has so far not been verified. Recently, a noninvasive technique was developed to evaluate CC (B4C sensor), making it possible to analyse CC in patients outside the neurosurgical environment. Therefore, the main objective of this study was to assess the presence of CC impairment in patients with COVID-19, and observe potential influences of this syndrome on cerebral hemodynamics.

The aim of the study to investigate the effect of tourniquet application on optic nerve sheath diameter (ONSD) and cerebral oxygenation during lower extremity surgery.

Researchers have developed a probe that contains infrared light sources that can illuminate the deep brain tissue of the frontal lobe. Photodetectors in the probe detect the backscattered light, which is modulated by pulsation of the cerebral arteries. Changes in the extramural arterial pressure affect the morphology of the recorded optical pulse, so analysis of the acquired signal using an appropriate algorithm could enable the calculation of the intracranial pressure noninvasively (nICP), which would be displayed to clinicians continuously. This pilot study is the first evaluation of the device in patients in who the gold standard comparator of invasive ICP was available. The acquisition of pulsatile optical signals was performed for up to 48 hours in each of the 40 patients who were undergoing invasive ICP monitoring as part of their normal medical treatment. Features of the optical signals would be analysed offline. A machine vector support algorithm would be implemented, with the aim of estimating ICP noninvasively and compared to the gold standard of synchronously acquired invasive ICP data.

This study investigates the relationship between optic nerve sheath diameter and increased intracranial pressure and its effect on neurologic outcome in post-cardiopulmonary arrest patients.