View clinical trials related to Intracranial Hypertension.
Filter by:Background: Although placement of an intra-cerebral catheter remains the gold standard method for measuring intracranial pressure (ICP), there are several limitations to the method. Objectives: The main objective of this study was to compare the correlation and the agreement of the wave morphology between the ICP (standard ICP monitoring) and a new nICP monitor in patients admitted with stroke. Our secondary objective was to estimate the accuracy of four non-invasive methods to assess intracranial hypertension. Methods: We prospectively collected data of adults admitted to an intensive care unit (ICU) with subarachnoid hemorrhage (SAH), intracerebral hemorrhage (ICH) or ischemic stroke (IS) in whom invasive ICP monitoring placed. Measures had been simultaneously collected from the following non-invasive indices: optic nerve sheath diameter (ONSD), pulsatility index (PI) using transcranial Doppler (TCD), a 5-point visual scale designed for Computed Tomography (CT) and two parameters (time-to-peak [TTP] and P2/P1 ratio) of a non-invasive ICP wave morphology monitor (Brain4care[B4c]). Intracranial hypertension was defined as an invasively measured ICP > 20 mmHg for at least five minutes.
Fluid challenge is frequently used in fluid management of critically ill patients. Assessing whether there is a preload reserve that can be used to increase the stroke volume by delivering a small amount of fluid in a short period of time. Optimization of fluid therapy is very important in intensive care patients. Inappropriate fluid therapy can cause significant morbidity and even mortality. Increased intracranial pressure is one of these important complications. In the present study, we planned to evaluate the effect of a fluid challenge on intracranial pressure by measuring the optic nerve sheath diameter (ONSD).
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.
Idiopathic intracranial hypertensionis a type of increased intracranial pressure. Diagnosis is made by lumbar puncture, which is an invasive technique. The relationship between ICP and optic nerve sheath diameters (ONSD) were examined in our study. Thus, it was investigated whether the optic nerve sheath diameter could be used in the diagnosis of IIH. In the present study, it was found that ONSD measurement by optic USG significantly reflects increased ICP and decreasing pressure via LP is rapidly reflects to ONSD measurement. And it is suggested that ONSD measurements by optic USG, a non-invasive method, can be used in the diagnosis and follow-up of IIH patients.
Bilateral transverse sinus stenosis (BTSS) is associated with intracranial hypertension (IH). However, not every BTSS patients presented with IH. The risk factors of IH in BTSS patients remained obscure. Vertebral venous collaterals (VVC) were often found in patients with bilateral transverse sinus stenosis (BTSS). The purpose of this study was to investigate the physiological role of VVC in BTSS patients.
Caudal anesthesia is a commonly used neuraxial anesthesia method for children. Injection of a certain volume of fluid into the epidural space for cauda anesthesia may push some cerebrospinal fluid towards the head, which may lead to mild increase of pressures inside the head. Such mild changes are compensated well by healthy individuals and no clinical sequel is seen, however at-risk populations may be affected. We aim to see how different amounts of fluid injected into the epidural space may change two clinical parameters affected by intracranial pressure to determine if a lower volume is safer than a higher one.
Resection surgery of brain tumors by craniotomy requires efficient brain relaxation intraoperatively in order to avoid injuries caused by the brain retractors (such as ischemic-reperfusion and cerebral oedema). The gold standard for the brain relaxation during a surgery is Mannitol 20%. Molar sodium lactate is now used to induce brain relaxation in patients with traumatic brain injury and intracranial hypertension due to its osmotic effect. Furthermore, the injection of sodium lactate may lead to better neuronal metabolism during cerebral aggression, and may participate to the reduction of cerebral oedema and secondary injuries. LSD is a pilot randomised trial which tries to assess the interest of intravenous administration of molar Sodium Lactate on the quality of brain relaxation in surgical resection of supratentorial brain tumors by craniotomy. The primary outcome measure is the quality of brain relaxation, evaluated by neurosurgeon at the opening of the dura, by a validated brain relaxation scale.
General anesthesia and regional anesthesia can be chosen in cesarean operations. Endotracheal intubation and mechanical ventilation are components of general anesthesia. Endotracheal intubation has been shown to cause increased intracranial pressure. There is not enough information about the effect of spinal anesthesia on intracranial pressure during cesarean operations. Increased intracranial pressure can cause neurological complications by disrupting brain perfusion. For this reason, the investigators think that the safe anesthesia method should be determined especially in pregnant patients who are at risk of increased intracranial pressure.
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.
Idiopathic Intracranial Hypertension (IIH) is a rare disease, primarily affecting overweight females of child-bearing age. Patients suffer from increased intracranial pressure (ICP), typically resulting in headaches, visual disturbances and bilateral papilledema, pulsatile tinnitus and cognitive deficits. The disease is difficult to diagnose, treat and monitor. The only current method of measuring the ICP in day-to-day clinical practice is by lumbar puncture. This procedure is invasive, and often painful for the patient. There is an unmet need of methods that can reliable measure or estimate ICP in a non-invasive manner. Ultrasound is one such potential method, and the aim of this study is to investigate the use of ocular ultrasound and transcranial doppler to measure or estimate ICP.