Neurocritical care
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Intracranial pressure (ICP) remains a pivotal physiological signal for managing brain injury and subarachnoid hemorrhage (SAH) patients in neurocritical care units. Given the vascular origin of the ICP, changes in ICP waveform morphology could be used to infer cerebrovascular changes. Clinical validation of this association in the setting of brain trauma, and SAH is challenging due to the multi-factorial influences on, and uncertainty of, the state of the cerebral vasculature. ⋯ Since the dilation/constriction of the cerebral vasculature resulted in detectable consistent changes in ICP MOCIAP metrics, by an extended monitoring practice of ICP that includes characterizing ICP pulse morphology, one can potentially detect cerebrovascular changes, continuously, for patients under neurocritical care.
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Drug interactions in the neurosciences intensive care unit (NICU) may involve antiepileptic drugs and warfarin. Most commonly used antiepileptic drugs are either potent hepatic enzyme inducers or inhibitors and they affect the metabolism of warfarin. Valproic acid also displaces warfarin from the protein binding sites resulting in significant INR changes but this type of drug interaction is less well known. ⋯ With both acidic drugs present, a loading dose of valproic acid may displace warfarin from the protein binding sites resulting in redistribution of warfarin in free active form and lead to a rapid increase in INR.
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Case Reports
Propofol Infusion syndrome during refractory status epilepticus in a young adult: successful ECMO resuscitation.
Propofol infusion syndrome (PRIS) is a rare but serious complication of propofol administration consisting of metabolic disorder with acidosis, often leading to fatal cardiovascular collapse. ⋯ Careful consideration should be given before prescribing propofol as first-line therapy for RSE, and this drug should be avoided altogether if high doses are required. Close biochemical monitoring is needed if propofol is used for more than a few hours, so that PRIS can be recognized promptly. Immediate discontinuation of propofol is essential, and early hemofiltration should be initiated. ECMO should be considered in cases of cardiocirculatory failure.
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Case Reports
Surgical treatment of space occupying edema and hemorrhage due to cerebral venous thrombosis during pregnancy.
During late pregnancy and the puerperium cerebral venous and sinus thrombosis (CVST) is a rare but important cause of stroke. Despite adequate anticoagulation some patients deteriorate, which may warrant the use of more aggressive treatment modalities. ⋯ While previous reports have demonstrated the feasibility of decompressive hemicraniectomy in selected patients with CVST and beginning herniation due to space occupying brain edema, venous infarction and congestional bleeding with mass effect, our rare case supports the notion that this procedure can also be life-saving in pregnant women.
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Randomized Controlled Trial Comparative Study
Randomized controlled trial comparing the effect of 8.4% sodium bicarbonate and 5% sodium chloride on raised intracranial pressure after traumatic brain injury.
Hypertonic sodium chloride solutions are routinely used to control raised intracranial pressure (ICP) after traumatic brain injury but have the potential to cause a hyperchloremic metabolic acidosis. Sodium bicarbonate 8.4% has previously been shown to reduce ICP and we have therefore conducted a randomized controlled trial to compare these two solutions. ⋯ An equiosmolar infusion of 8.4% sodium bicarbonate is as effective as 5% sodium chloride for reduction of raised ICP after traumatic brain injury when infused over 30 min.