Abstract:
:It has been suggested that N2O may alter the sensitivity of the brain to ischemia. To test this hypothesis. we examined the effects of N2O on the development of left-right hemispheric asymmetry in the electroencephalogram (EEG) during hemorrhagic hypotension in rats subjected to unilateral carotid occlusion. Rats were anesthetized with halothane/O2/air, and ventilated to normocarbia (PaCO2 approximately 40 mm Hg). Catheters were placed in the femoral artery and vein, and both common carotid arteries (CCA) were exposed. Bilateral fronto-occipital screws were then placed to record left and right hemispheric EEGs, which were processed by computer and stored on disc. Animals were then randomly assigned to one of three treatment groups (n = 8 each): group 1, 0.5 MAC (0.5%) halothane + 0.5 MAC (70%) N2O; group 2, 1 MAC (1.0%) halothane + 70% nitrogen; and group 3, 1 MAC halothane + 70% N2O. After stabilization, the left CCA were occluded. Animals with EEG changes at this point were discarded. Beginning 5 min later, venous blood withdrawal was started at a rate of 0.25 ml/min, while mean arterial blood pressure (MAP) and EEG were continuously recorded. After exsanguination was complete, EEG data (raw and processed) were re-examined by an individual who was unaware of the anesthetics administered to determine the MAP at which any evidence of EEG asymmetry appeared. There were no intergroup differences in weight, PaO2, PaCO2, pHa, blood glucose. hematocrit, or starting (prebleed) MAP. The earliest change in the EEG was typically a decrease in total amplitude over the hemisphere ipsilateral to the carotid occlusion. Adding 70% N2O to a 1 MAC halothane background (group 2 vs. group 3) had no effect on the MAP at which this EEG asymmetry appeared (54 +/- 13 vs. 53 +/- 10 mm Hg). However, this MAP was significantly higher in animals breathing 0.5 MAC halothane + 0.5 MAC N2O (group 1, 78 +/- 17 mm Hg, p = 0.0019 by ANOVA). We conclude that 70% N2O had no direct effects on the MAP at which EEG abnormalities appear (group 2 vs. 3), and that the observed differences are more closely related to the concentration of volatile agent. Whether these differences are related to anesthetic-induced differences in the brain's tolerance to reduced CBF or whether there are differences in cerebral blood flow (CBF) autoregulation are unknown.
journal_name
J Neurosurg Anesthesioljournal_title
Journal of neurosurgical anesthesiologyauthors
Zhou JG,Todd MM,Warner DS,Loftus CMdoi
10.1097/00008506-198906000-00004subject
Has Abstractpub_date
1989-06-01 00:00:00pages
103-9issue
2eissn
0898-4921issn
1537-1921pii
00008506-198906000-00004journal_volume
1pub_type
杂志文章abstract:BACKGROUND:Microdialysis is used to determine the concentrations of substances in the extracellular fluid of tissues. To date, it has not been used to measure rocuronium concentrations in human muscle. We determined the ability of microdialysis to recover rocuronium from muscle interstitial tissue for the purpose of as...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/ANA.0b013e3181c80a68
更新日期:2010-04-01 00:00:00
abstract::We report an unusual case of fatal intracranial hypertension following tracheostomy due to the obstruction of the internal jugular veins (left side: thrombosis after central venous cannulation, right side: hypoplastic vein) and their collaterals. Principal cerebral outflow through the internal jugular veins can be sub...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/00008506-200210000-00008
更新日期:2002-10-01 00:00:00
abstract:BACKGROUND:Remifentanil is an ultrashort-acting µ-opioid receptor agonist and is especially suitable for neuroanesthesia. We previously reported that general anesthesia with remifentanil for brain tumor resection was associated with lower postoperative mortality and shorter postoperative length of stay (LOS) when compa...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/ANA.0000000000000039
更新日期:2014-10-01 00:00:00
abstract::Patients receiving anticonvulsants such as phenytoin or carbamazepine may be resistant to neuromuscular blocking agents. The authors report the response to rapacuronium bromide (1.5 mg/kg) in two adult patients; one receiving phenytoin and the other receiving carbamazepine. In both patients, there was a delay in achie...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/00008506-200107000-00011
更新日期:2001-07-01 00:00:00
abstract::We present a retrospective review of the perioperative management and complications of 102 cases of acoustic neuroma operated on at an English teaching hospital over the last 9 years. Nine patients had a bulbar palsy postoperatively; five of those patients developed pulmonary complications. A bulbar palsy was more lik...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 临床试验,杂志文章
doi:10.1097/00008506-199707000-00011
更新日期:1997-07-01 00:00:00
abstract:BACKGROUND:Hemodynamic instability is commonly seen during carotid angioplasty and stenting. Although prophylactic treatment with anticholinergics is beneficial, selected use in high-risk patients is desirable. This study examines whether plaque characteristics on computed tomography angiography in addition to demograp...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/ANA.0000000000000689
更新日期:2020-05-05 00:00:00
abstract::Holoprosencephaly and single cerebral ventricle are uncommon congenital anomalies that are associated with a high rate of perinatal mortality. We describe a neonate who developed recurrent bradycardia along with delayed recovery following frontal craniotomy for the repair of a nasofrontal encephalocoele associated wit...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/00008506-200304000-00012
更新日期:2003-04-01 00:00:00
abstract::The effect of the calcium blocker nimodipine on the cerebral blood flow (CBF) and cerebral autoregulatory responses was examined in seven fentanyl/N2O/anesthetized pigs. CBF was measured continuously from the sagittal sinus by a venous outlet flow technique. Cerebral autoregulation tests were performed before, after 3...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/00008506-199404000-00007
更新日期:1994-04-01 00:00:00
abstract:BACKGROUND:Prone positioning and positive end-expiratory pressure can improve pulmonary gas exchange and respiratory mechanics. However, they may be associated with the development of intracranial hypertension. Intracranial pressure (ICP) can be noninvasively estimated from the sonographic measurement of the optic nerv...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/ANA.0000000000000295
更新日期:2017-07-01 00:00:00
abstract::This review assesses the extent to which sevoflurane fulfills the requirements of the ideal inhalational agent for use in neuroanesthetic practice. Sevoflurane's pharmacokinetic profile is outlined. Data from animal and human studies are used to discuss its effects on cerebral hemodynamics, central nervous system moni...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章,评审
doi:10.1097/00008506-200004000-00012
更新日期:2000-04-01 00:00:00
abstract::To reduce the incidence of neurological and neuropsychological dysfunction following hypothermic cardiopulmonary bypass (CPB), central nervous system (CNS) monitoring before, during, and after CPB seems to be necessary. Compared to the total scope of hemodynamic monitoring CNS monitoring, however, is mostly investigat...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章,评审
doi:10.1097/00008506-199510000-00018
更新日期:1995-10-01 00:00:00
abstract::Seizures are a common occurrence in the intensive care unit (ICU). The presentation of seizures is usually as focal or generalized motor convulsions, but other seizure types may occur. Etiologies of the seizures are typically secondary either to primary neurologic pathology or a consequence of critical illness and cli...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章,评审
doi:10.1097/00008506-200104000-00016
更新日期:2001-04-01 00:00:00
abstract::We describe a case of subarachnoid hemorrhage (SAH) complicated by acute respiratory distress syndrome (ARDS) and cerebral vasospasm. Inhaled nitric oxide (NO) was used to improve oxygenation, thereby facilitating cerebral aneurysm clipping. ...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/00008506-199904000-00009
更新日期:1999-04-01 00:00:00
abstract::Translocation of cerebrospinal fluid (CSF) between the intracranial and spinal subarachnoid space was blocked by ligating the cervical spinal core in eight cats under pentobarbital and nitrous oxide anesthesia, and the effects of cerebral venous congestion on the pressure-volume index (PVI), a measure relating the cha...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/00008506-199304000-00009
更新日期:1993-04-01 00:00:00
abstract:BACKGROUND:The sitting position has potential for serious complications such as cerebral ischemia and venous air embolism. This study investigated the effects of intermittent sequential compression device (SCD) on the changes in regional cerebral oxygen saturation (rSO2) during the sitting position. METHODS:Sixty-six ...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章,随机对照试验
doi:10.1097/ANA.0b013e3181e97a5e
更新日期:2011-01-01 00:00:00
abstract::Studies on cerebral blood flow during hypotension and high intracranial pressure are scarce. Accordingly, this study examines the effects of increased cerebrospinal fluid (CSF) pressure on the cerebral circulatory response to hemorrhage. Measurements of cerebral microcirculation with laser Doppler flowmetry was perfor...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/00008506-199801000-00011
更新日期:1998-01-01 00:00:00
abstract:STUDY DESIGN:A prospective, randomized study in a large general hospital setting. BACKGROUND:During spinal surgery, monitoring motor-evoked potentials (MEPs) is a means of assessing the intraoperative integrity of corticospinal pathways. However, MEPs are known to be sensitive to the effects of anesthetic agents. OBJ...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章,随机对照试验
doi:10.1097/01.ana.0000211007.94269.50
更新日期:2006-07-01 00:00:00
abstract::Motor evoked potentials (MEPs) after transcranial magnetic stimulation (TMS) have been examined in 12 monkeys under neuroleptanalgesia (NLA). Compound muscle action potentials were recorded from abductor policis brevis (APB) and gastroncnemius (GN) muscles contralateral to the stimulation site. After obtaining baselin...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/00008506-199106000-00006
更新日期:1991-06-01 00:00:00
abstract::Different anesthetic techniques have been suggested for craniotomy with intraoperative awakening. We describe an asleep-awake-asleep technique with propofol and remifentanil infusions, with pharmacokinetic simulation to predict the effect-site concentrations and to modulate the infusion rates of both drugs, and bispec...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/ANA.0b013e31805f66ad
更新日期:2007-07-01 00:00:00
abstract::Levels of jugular blood oxygen saturation (SjvO2) and lactate have been proposed as indicators of cerebral ischemia and prognosis. However, sensitivity and specificity of these markers remain unknown. We retrospectively analyzed records of a series of 43 comatose patients at risk for cerebral ischemia, mainly after he...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/00008506-200407000-00007
更新日期:2004-07-01 00:00:00
abstract::Cerebral air embolism occurred in a patient undergoing posterior fossa surgery performed in the sitting position for acoustic neuroma removal. The patient experienced two episodes of venous air embolism, as evidenced by precordial Doppler, end-tidal carbon dioxide reduction, and oxygen desaturation. In both cases, air...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/00008506-199601000-00008
更新日期:1996-01-01 00:00:00
abstract::Stereotactically guided procedures are performed for an ever extending range of conditions. They present a unique anesthetic challenge. In our institution, a standardized anesthetic protocol for total intravenous anesthesia (TIVA) augmented by electrophysiologic monitoring with BIS or AEP monitors was introduced. We c...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/01.ana.0000211030.72291.67
更新日期:2007-01-01 00:00:00
abstract::Obstructive hydrocephalus remains a problem, and improvements in fiberoptic technology have promoted interest in neuroendoscopic ventriculostomy (NTV) as an alternative to standard cerebrospinal fluid shunts. The present study assessed 210 pediatric NTVs performed between 1994 and 2004 in patients aged 2 months to 10 ...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:
更新日期:2005-01-01 00:00:00
abstract::The trigeminocardiac reflex is a well-described brainstem reflex that clinically manifests as bradycardia, hypotension, or apnea. This physiological phenomenon is extensively reported during open neurosurgical procedures, but very few data exist for trigeminocardiac reflex occurrence during neurointerventional procedu...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/ANA.0000000000000723
更新日期:2020-08-28 00:00:00
abstract::The effects of PaCO2 and mean arterial pressure (MAP) on succinylcholine-induced changes in cerebrospinal fluid (CSF) pressure were examined in 31 dogs anesthetized with halothane (0.7% end-expired) and nitrous oxide (66% inspired) in oxygen. Group 1 (n = 9) received succinylcholine (1.5 mg/kg i.v.) without control of...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/00008506-199003000-00002
更新日期:1990-03-01 00:00:00
abstract::Inflammatory response with cytokine release is reported to correlate with clinical outcome after aneurysmal subarachnoid hemorrhage (SAH). In selected cases, hypothermia and barbiturate coma are applied as means for neuroprotection after severe SAH. Hypothermia and high-dose barbiturate are reported to attenuate the i...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/ANA.0b013e31817996bf
更新日期:2008-07-01 00:00:00
abstract:BACKGROUND:Hyperosmolar solutions have been used in neurosurgery to modify brain bulk and prevent neurological deterioration. The purpose of the study was to compare the effects of equivolume, equiosmolar solutions of mannitol and hypertonic saline (HTS) on brain relaxation and postoperative complications in patients u...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章,随机对照试验
doi:10.1097/ANA.0000000000000091
更新日期:2015-01-01 00:00:00
abstract::The aim of this study was to determine the influence of acute and chronic ethanol treatment on neurological outcome following head trauma in rats. Eight-two Sprague-Dawley rats were divided into 10 groups. Four groups received sham head trauma (surgical incision of the scalp but no trauma) and were treated with (A) no...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/00008506-199704000-00003
更新日期:1997-04-01 00:00:00
abstract:BACKGROUND:Postoperative nausea and vomiting (PONV) is common after general anesthesia and are reported by approximately 20% to 25% of all patients and up to 39% of patients undergoing neurosurgical procedures. The most common standard prophylaxis is a single application of 4 mg of dexamethasone before initiating anest...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章
doi:10.1097/ANA.0000000000000007
更新日期:2014-07-01 00:00:00
abstract:BACKGROUND:Postoperative nausea and vomiting (PONV) are frequent and harmful complications after neurosurgery. Current pharmacy-based treatment is the standard of care; it, however, lacks efficiency. Invasive and noninvasive acupuncture at the P6 meridian point has been shown to be effective in the prevention of PONV. ...
journal_title:Journal of neurosurgical anesthesiology
pub_type: 杂志文章,随机对照试验
doi:10.1097/ANA.0b013e31825eb5ef
更新日期:2012-10-01 00:00:00