Abstract:
:Pressure volume index (PVI) and cerebrospinal fluid (CSF) outflow resistance (Ro) were estimated in spontaneously breathing anestheized cats by the bolus injection test under normal conditions and also under abnormal conditions produced by slow infusion of saline into the CSF space. Bolus injections were made separately into the lumbar subarachnoid space, cisterna magna, and lateral ventricle. The mean PVI values in the lumbar sac, cisterna magna, and lateral ventricle under normal conditions were 0.70, 0.71, and 0.64 ml, respectively; not significantly different from each other. Saline infusion lowered PVI significantly at every site; PVI values in the lumbar sac, cisterna magna, and lateral ventricle were 0.54, 0.52, and 0.53 ml, respectively; not significantly different from each other. Indirect values of PVI were calculated from the pressure responses observed at sites other than where the bolus had been injected. These indirect PVI values were always greater than PVI at the injection site under normal conditions, but differences between direct and indirect PVI values were abolished during saline loading of the CSF space. The Ro was estimated under normal conditions in the lumbar sac, cisterna magna, and lateral ventricle to be 81.6, 85.6, and 110.3 mm Hg/ml/min, respectively. The lateral ventricle Ro was significantly higher than at other places. These findings suggest that, when there is no blockage in the craniospinal axis, the pressure response to a bolus change in CSF volume is freely transmitted, direct measurements of PVI are independent of location, and indirect measurements are larger because of "buffering" in the CSF space. When PVI is lowered and buffering capacity is exhausted, these differences between direct and indirect PVI values disappear.
journal_name
J Neurosurgjournal_title
Journal of neurosurgeryauthors
Takizawa H,Gabra-Sanders T,Miller JDdoi
10.3171/jns.1986.64.2.0298subject
Has Abstractpub_date
1986-02-01 00:00:00pages
298-303issue
2eissn
0022-3085issn
1933-0693journal_volume
64pub_type
杂志文章abstract:OBJECT:Proper screening, management, and follow-up of Grade 1 and 2 blunt carotid artery injuries (BCIs) remains controversial. These low-grade BCIs were analyzed to define their natural history and establish a rational management plan based on lesion progression and cerebral infarction. METHODS:A retrospective review...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2015.1.JNS14642
更新日期:2015-05-01 00:00:00
abstract::The authors report a series of 100 consecutive patients with spinal metastases causing cord or cauda equine compression, who were treated with surgical decompression. Of these, 30% (all women) had breast cancer. The most common primary neoplasm in man was prostatic carcinoma. Pain was the earliest and most prominant s...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1978.49.6.0839
更新日期:1978-12-01 00:00:00
abstract:OBJECT:Diffusely infiltrating astrocytomas are the most common primary brain tumors. As a group, they demonstrate an inherent tendency toward malignant progression. Histological grading using the guidelines of the World Health Organization (WHO) remains the gold standard for predicting the biological behavior of these ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/JNS/2008/108/2/0330
更新日期:2008-02-01 00:00:00
abstract::The first reported instance of identical twins with moyamoya disease is presented. The involved portions of the main intracranial arteries were similar, but the formation of the moyamoya vessels was somewhat different. The cause fo obstructive changes in large intracranial arteries remains obscure, but the frequent fa...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1980.53.1.0109
更新日期:1980-07-01 00:00:00
abstract::A patient is reported whose hydrocephalus was controlled by diverting the ventricular cerebrospinal fluid directly into the urinary bladder. This drainage route may have a useful place in the management of the adult pressure-sensitive patient whose more conventional shunt requires frequent revision for repeated obstru...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1980.53.6.0858
更新日期:1980-12-01 00:00:00
abstract:OBJECT:Historically, destructive procedures for cancer pain were the main line of treatment therapy. However, the use of high-dose opioids has essentially replaced such procedures. Recognition of the limits of medical therapy to treat cancer pain effectively is growing, while conversely, in regions with limited access ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章,评审
doi:10.3171/2010.6.JNS10119
更新日期:2011-01-01 00:00:00
abstract::Three patients with severe postoperative hemiplegia and one with hemiplegia following a subarachnoid hemorrhage are presented. None had hematomas. All were treated with dopamine-induced hypertension, mannitol, and large quantities of intravascular fluids. All showed a remarkable degree of clinical improvement, presuma...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1978.49.4.0525
更新日期:1978-10-01 00:00:00
abstract::The sphenopalatine ganglion (SPG) has been assumed to be involved in the genesis of several types of facial pain, including Sluder's neuralgia, trigeminal neuralgia, persistent idiopathic facial pain, cluster headache, and atypical facial pain. The gold standard treatments for SPG-related pain are percutaneous procedu...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2016.1.JNS152272
更新日期:2017-02-01 00:00:00
abstract::The author, while a research illustrator at the Smithsonian Institution National Museum of Natural History, studied two ancient skulls from the Incan period in Peru, both with trephination. Her conclusions and illustrations of the skulls are included in this paper. ...
journal_title:Journal of neurosurgery
pub_type: 历史文章,杂志文章
doi:10.3171/jns.1992.76.3.0550
更新日期:1992-03-01 00:00:00
abstract::A retrospective series of 12,478 patients with breast cancer included 2467 patients with spinal metastases. Local treatment was not necessary in 688 patients. Neurological dificit did not develop in 1735 patients who underwent radiotherapy. Forty-four patients developed myelopathy due to spinal cord compression as dem...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1977.47.5.0653
更新日期:1977-11-01 00:00:00
abstract:OBJECT:Approximately 25% of patients exhibit cognitive dysfunction 24 hours after carotid endarterectomy (CEA). One of the purported mechanisms of early cognitive dysfunction (eCD) is hypoperfusion due to inadequate collateral circulation during cross-clamping of the carotid artery. The authors assessed whether poor co...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2014.5.JNS131736
更新日期:2014-09-01 00:00:00
abstract:OBJECT:Previous studies have shown a relationship between a patient's stage of diffuse axonal injury (DAI) and outcome. However, few studies have assessed whether a specific lesion or type of corpus callosum injury (CCI) influences outcome in patients with DAI. The authors investigated the effect of various DAIs and CC...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2011.6.JNS11513
更新日期:2011-11-01 00:00:00
abstract::Forty-one consecutive patients with supratentorial primary brain tumors (38 Grade III and IV astrocytomas, one giant-cell astrocytoma, and two cases with insufficient tissue for diagnosis) were randomly allocated within 2 weeks of surgery to one of three therapeutic groups. Group 1 (15 patients) received radiation the...
journal_title:Journal of neurosurgery
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.3171/jns.1976.45.2.0129
更新日期:1976-08-01 00:00:00
abstract:OBJECT:The aims of this study were to determine the following: whether there are sex differences in intracerebral hemorrhage (ICH) induced brain injury in rats, whether delayed administration of 17beta-estradiol can reduce ICH-induced brain damage, and whether these effects are estrogen receptor (ER)-dependent. METHOD...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.2005.103.1.0097
更新日期:2005-07-01 00:00:00
abstract:OBJECT:The authors investigated early changes in the cerebral arteries of rats that occur after subarachnoid hemorrhage (SAH). METHODS:Messenger RNA was investigated by performing microarray and quantitative real-time polymerase chain reaction (PCR) analyses, and protein expression was shown by performing immunohistoc...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.2006.105.3.438
更新日期:2006-09-01 00:00:00
abstract:OBJECT:The authors experienced an intriguing phenomenon in 2 adult patients with moyamoya disease. Mouth opening caused reversible occlusion of the donor superficial temporal artery (STA), and the patients exhibited transient cerebral ischemic symptoms. The aim of this study was to assess the incidence of such occlusio...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2014.10.JNS141805
更新日期:2015-09-01 00:00:00
abstract::The radiographic features and long-term clinical outcome in three patients who presented at birth with a cystic suboccipital mass in direct communication with the fourth ventricle are reviewed. The pathological findings in a fourth infant who died are also discussed. All surviving infants were treated with cyst excisi...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1984.61.2.0348
更新日期:1984-08-01 00:00:00
abstract::Bacteriological studies were performed on 45 craniocerebral missile wounds incurred in Vietnam within 2 to 4 hours of occurrence. All missiles had penetrated into the brain. Aerobic and anaerobic cultures were taken of the skin wound, brain, and indriven bone fragments. Forty-four of the skin wounds were contaminated,...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1971.34.2part1.0145
更新日期:1971-02-01 00:00:00
abstract:OBJECT:Cerebral vasospasm following subarachnoid hemorrhage (SAH) causes significant morbidity in a delayed fashion. The authors recently published a new scale that grades the maximum thickness of SAH on axial CT and is predictive of vasospasm incidence. In this study, the authors further investigate whether different ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章,随机对照试验
doi:10.3171/2013.10.JNS13419
更新日期:2014-02-01 00:00:00
abstract:OBJECTIVE:Intraoperative nerve action potential (NAP) recording is a useful tool for surgeons to guide decisions on surgical approaches during nerve repair surgeries. However, current methods remain technically challenging. In particular, stimulus artifacts that contaminate or mask the NAP and therefore impair the inte...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2019.5.JNS19146
更新日期:2019-08-16 00:00:00
abstract::OBJECTIVE Treatment with a BRAF mutation inhibitor might shrink otherwise refractory craniopharyngiomas and is a promising preoperative treatment to facilitate tumor resection. The aim of this study was to investigate the noninvasive diagnosis of BRAF-mutated craniopharyngiomas based on MRI characteristics. METHODS Fi...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2017.4.JNS163113
更新日期:2018-07-01 00:00:00
abstract::Corticosteroids are frequently used in the treatment of spinal trauma, although neither experimental nor clinical evidence to support their use is persuasive. Recently there have been claims that extremely high doses ("megadoses") of corticosteroids (equivalent to 15 to 30 mg/kg of methylprednisolone) improve neurolog...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1984.60.4.0712
更新日期:1984-04-01 00:00:00
abstract::Changes in the brain parenchyma and cerebrospinal fluid spaces were demonstrated in three cases of dural arteriovenous malformations by computerized tomography (CT). In various combinations, there were 1) vermiform or patchy enhancement after intravenous contrast infusion, 2) abnormal decreased density mainly in the w...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1980.53.5.0698
更新日期:1980-11-01 00:00:00
abstract:OBJECT:Microangiopathy associated with hypertension is a notable cause of cerebral small vessel disease (SVD), including deep intracerebral hemorrhage (ICH) and lacunar infarct. Dotlike low-intensity spots (dotlike hemosiderin spots: dotHSs) on T2*-weighted magnetic resonance (MR) images have been histologically diagno...
journal_title:Journal of neurosurgery
pub_type: 临床试验,杂志文章
doi:10.3171/jns.2004.101.6.0915
更新日期:2004-12-01 00:00:00
abstract::Acute subdural hematoma (SDH) complicates 20% of severe human head injuries and causes death or severe disability in 60% of these cases, due to brain swelling and high intracranial pressure. Although the mechanisms for these phenomena are unknown, previous studies have implicated excitatory amino acid-mediated mechani...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1996.85.4.0655
更新日期:1996-10-01 00:00:00
abstract::Acidophil stem-cell pituitary adenomas account for less than 5% of pituitary tumors. Only 15 cases have previously been reported, with a mean age of occurrence of 38.7 years. A case of this unusual tumor is reported in a prepubertal girl. Clinical symptoms included prominent behavioral disturbance with associated head...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1989.70.2.0266
更新日期:1989-02-01 00:00:00
abstract::The authors report on the case of a 6-year-old boy who underwent resection of a midline cerebellar tumor. The boy was able to speak fluently after the operation. Magnetic resonance (MR) imaging showed that the right dentate nucleus had been partially removed along with the tumor, but that the left dentate nucleus rema...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.2006.104.2.329
更新日期:2006-02-01 00:00:00
abstract::Spontaneous intracranial hypotension due to a cerebrospinal fluid (CSF) leak in the spine is an important cause of new, daily persistent headaches. Most patients respond well to conservative treatments including epidural blood patching. Limited options for effective treatment are available for patients in whom these t...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.2004.100.6.1098
更新日期:2004-06-01 00:00:00
abstract::OBJECTIVE The vascular lumen of an acutely occluded internal carotid artery (ICA) generally contains numerous thrombi. Therefore, carotid angiography on the affected side during revascularization therapy of acute ICA occlusion has a potential risk of causing distal embolization. In this study the authors propose the u...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2017.3.JNS162563
更新日期:2018-08-01 00:00:00
abstract:OBJECT:The prevalence of deformational, or positional, plagiocephaly has increased during the last decade. Treatments vary among centers, ranging from expectant management to orthotic helmet therapy to craniofacial remodeling. This management variability is partially due to a lack of objective methods with which to mea...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/ped.2004.100.5.0537
更新日期:2004-05-01 00:00:00