Active clinical trials for "Intracranial Hypertension"

Measurement of the diameter of the sheath of the optic nerve in patients hospitalized in intensive care, with increased intracranial pressure (> 20mmHg) as a substitute measure for diagnosis and follow-up before and after different non-invasive strategies. Three groups were created in which, through strategies already proven and non-invasive (mannitol, hypertonic solution 7.5% NaCl, reverse trendelenburg) to decrease the intracranial pressure, the optic nerve diameter measurement was performed and simultaneously the investigators monitored intracranial pressure through an intraventricular catheter continuously to determine if both correspond

Patient undergoing laparoscopic radical prostatectomy in steep trendelenburg position are at risk to develop complication from brain edema. Ultrasound assessment of optical nerve sheath diameter is a simply, non-invasive method to estimate the increase of intracranial pressure. It is unknown how optical nerve sheath diameter changes after prolonged head down position.

The aim of the study is to evaluate accuracy and precision of non-invasive intracranial pressure measurement device (Vittamed 205) for selected patients compared with cerebrospinal fluid pressure measured during lumbar puncture

The motivation results from the fact, that an intra-abdominal pressure is correlated with cerebral perfusion, in a mechanism of reducing venous outflow. Moreover, elevated intra-abdominal pressure leads to increase in intracranial pressure and decrease of cerebral perfusion pressure. The main aim of the study was to investigate an influence of increase in intra-abdominal pressure on cerebral oxygenation measured with the use of non-invasive optical technique.

Elevated intracranial pressure (ICP) is a common and potentially life threatening condition arising from a variety of pathological conditions including traumatic brain injury (TBI), intracranial hemorrhage, subarachnoid hemorrhage and brain tumors. Monitoring the ICP is the most important aspect of the management of these patients. Recently, transorbital ultrasonography has gained popularity as a noninvasive bedside exam that has been shown to be useful in the diagnosis of raised ICP by evaluating the change in the optic nerve sheath diameter (ONSD). Transorbital ultrasonographic measurement of ONSD appears to be a noninvasive, relatively inexpensive bedside examination for the diagnosis of raised ICP. The investigators aimed to determine the changes in ONSD with acute controlled changes in ICP in healthy volunteers. The controlled changes in ICP will be produced by manipulating the PCO2 with the use of Respiract and jugular venous compression with the use of custom made neck collar.

The aim of this study is to determine whether we can predict the intracranial pressure using near infra-red spectroscopy

There is statistically significant correlation between invasive measures of intracranial pressure (ICP) and non-invasive, real-time, continuous physiologic waveform data algorithms to predict ICP. Furthermore, characteristics within this physiologic waveform data will allow modeling for trend prediction of derived ICP information. Specific aims: Develop models to estimate ICP and cerebral perfusion pressure (CPP) after traumatic brain injury in humans. Predict and anticipate changes in ICP for preemptive management purposes. Analyze characteristics of changes in ICP after treatment failure. Analyze data to predict/anticipate confounding physiologic factors that affect ICP and its treatment. Test the resulting models in real time.

The study is a prospective, multi-center, non-randomized, open label observational study. The objective of this study is to compare the accuracy of the EyeBOX to a clinical diagnosis of abnormal ICP as determined by an external ventriculostomy drain (EVD) or ventriculostomy catheter.

The purpose of this study is to evaluate the change of the optic nerve sheath diameter after deflation of pneumatic tourniquet.

Optic Nerve Ultrasound (ONUS) is a promising non-invasive tool for the detection of raised Intracranial Pressure (ICP). Variability in the optimal Optic Nerve Sheath Diameter (ONSD) threshold corresponding to elevated ICP in multiple studies limits the value of ONUS in clinical practice. The investigators goal is to develop and validate an automated image analysis algorithm for standardization of ONSD measurement from ultrasound videos. Patients with acute brain injury requiring invasive ICP monitoring will undergo bedside ONUS, with blinded ONSD measurement by an expert investigator. The image analysis algorithm will then be used to measure ONSD and accuracy determined compared to the "reference standard" expert measurement.