Abstract:
:Clinical studies with transcranial Doppler suggest that the pulsatility of the flow velocity (FV) waveform increases when the distal cerebrovascular resistance (CVR) increases. To clarify this relationship, the authors studied animal models in which the resistance may be decreased in a controlled manner by an increase in arterial CO2 tension, or by a decrease in cerebral perfusion pressure (CPP) in autoregulating animals. Twelve New Zealand white rabbits were anesthetized, paralyzed, and ventilated. Transcranial Doppler basilar artery FV, laser Doppler cortical blood flow, arterial pressure, intracranial pressure, and end-tidal CO2 concentration were measured continuously. Cerebrovascular resistance (CPP divided by laser Doppler cortical flux) and Gosling Pulsatility Index (PI, defined as an FV pulse amplitude divided by a timed average FV) were calculated as time-dependent variables for each animal. Four groups of animals undergoing controlled manipulations of CVR were analyzed. In Group I, arterial CO2 concentration was changed gradually from hypocapnia to hypercapnia. In Group II, gradual hemorrhagic hypotension was used to reduce CPP. In Group III, the short-acting ganglion blocking drug trimetaphan was injected intravenously to induce transient hypotension. Intracranial hypertension was produced by subarachnoid saline infusion in Group IV. During the hypercapnic challenge the correlation between the cortical resistance and Doppler flow pulsatility was positive (r = 0.77, p<0.001). In all three groups in which cerebral perfusion pressure was reduced a negative correlation between pulsatility index and cerebrovascular resistance was found (r = -0.84, p<0.001). The authors conclude that PI cannot be interpreted simply as an index of CVR in all circumstances.
journal_name
J Neurosurgjournal_title
Journal of neurosurgeryauthors
Czosnyka M,Richards HK,Whitehouse HE,Pickard JDdoi
10.3171/jns.1996.84.1.0079subject
Has Abstractpub_date
1996-01-01 00:00:00pages
79-84issue
1eissn
0022-3085issn
1933-0693journal_volume
84pub_type
杂志文章abstract::A 13-year-old girl was referred for evaluation of the deceleration in her rate of linear growth, an arrest in the progression of her pubertal maturation, and bifrontal headaches. Detailed endocrinological and radiological studies revealed the following abnormalities: partial growth hormone deficiency, prepubertal lute...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1983.58.6.0932
更新日期:1983-06-01 00:00:00
abstract:OBJECTIVE:Surgery for subdural hematoma (SDH) is a commonly performed neurosurgical procedure. This study identifies patient characteristics associated with adverse outcomes and prolonged length of stay (LOS) in patients who underwent surgical treatment for SDH. METHODS:All patients in the American College of Surgeons...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2015.2.JNS142721
更新日期:2016-03-01 00:00:00
abstract::Tandem internal carotid artery (ICA) origin occlusion and middle cerebral artery (MCA) thromboembolism is a life-threatening condition with poor neurological outcome. The authors report on a patient presenting with acute ischemic stroke from a tandem ICA and MCA occlusion with penumbra. Emergency MCA mechanical thromb...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2017.6.JNS162368
更新日期:2018-09-01 00:00:00
abstract::Susceptibility weighted imaging (SWI) is a relatively new imaging technique. Its high sensitivity to hemorrhagic components and ability to depict microvasculature by means of susceptibility effects within the veins allow for the accurate detection, grading, and monitoring of brain tumors. This imaging modality can als...
journal_title:Journal of neurosurgery
pub_type: 杂志文章,评审
doi:10.3171/2015.1.JNS142349
更新日期:2015-12-01 00:00:00
abstract:OBJECT:The prognostic significance of tumor grade and resection and the efficacy of prophylactic radiation remain controversial in the management of intracranial ependymoma. The outcomes in patients with intracranial ependymoma treated at the Kyoto University Hospital were reviewed retrospectively, and prognostic signi...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.2005.103.1.0031
更新日期:2005-07-01 00:00:00
abstract::The use of surgical treatment for depressed skull fractures that are located over major venous sinuses is a matter of controversy. However, if clinical and radiological findings of sinus obliteration and related intracranial hypertension are present, surgical decompression is indicated. The authors present the case of...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1998.88.3.0598
更新日期:1998-03-01 00:00:00
abstract:OBJECT:The reduction in the level of nitric oxide (NO) is a purported mechanism of delayed vasospasm after subarachnoid hemorrhage (SAH). Evidence in support of a causative role for NO includes the disappearance of nitric oxide synthase (NOS) from the adventitia of vessels in spasm, the destruction of NO by hemoglobin ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.2000.92.1.0121
更新日期:2000-01-01 00:00:00
abstract::The mortality rate, risk of rebleeding, relevant subjective and objective symptoms, and daily functional capacity after a verified subarachnoid hemorrhage (SAH) of unknown etiology were evaluated in 44 patients treated during a 5-year period (1978 to 1983). A vascular basis for the SAH had been excluded by bilateral c...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1984.61.6.1029
更新日期:1984-12-01 00:00:00
abstract:OBJECT:Inflammatory responses and oxygen free radicals have increasingly been implicated in the development of ischemic brain injury. In some cases, an attenuation of inflammation or free-radical injury can provide tissue protection. Diphosphoryl lipid A (DPL) is a detoxified derivative of a lipopolysaccharide (endotox...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.2000.92.3.0435
更新日期:2000-03-01 00:00:00
abstract::The surgical treatment of cerebrovascular malformations intrigued early neurosurgeons. Cushing defined vascular malformations as tumors arising from cerebral blood vessels. He successfully resected the first arteriovenous malformation 3 years after it had been irradiated. In the absence of angiography, the pathoanatom...
journal_title:Journal of neurosurgery
pub_type: 传,历史文章,杂志文章
doi:10.3171/jns.2004.101.3.0553
更新日期:2004-09-01 00:00:00
abstract:OBJECTIVE:It is well known that larger aneurysm size is a risk factor for poor outcome after surgical treatment of unruptured saccular intracranial aneurysms (USIAs). However, the authors have occasionally observed poor outcome in the surgical treatment of small USIAs and hypothesized that size ratio has a negative imp...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2018.4.JNS173221
更新日期:2018-09-21 00:00:00
abstract:OBJECT:Intrinsic disease processes of the brainstem (gliomas, neurodegenerative disease, and others) have remained difficult or impossible to treat effectively because of limited drug penetration across the blood-brainstem barrier with conventional delivery methods. The authors used convection-enhanced delivery (CED) o...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.2002.97.4.0905
更新日期:2002-10-01 00:00:00
abstract:OBJECT:Disturbance in anorectal function is a major factor restricting the activities of daily living in patients with spinal cord disorders. To detect changes in anorectal motilities due to a tethered spinal cord, anorectal functions were evaluated using a saline enema test and fecoflowmetry before and after patients ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/spi.2003.98.3.0251
更新日期:2003-04-01 00:00:00
abstract:OBJECTIVE:The endovascular treatment of complex bifurcation aneurysms possessing a neck that incorporates multiple side branches remains a surgical challenge. Double-stent-assisted coiling techniques, such as those with stents in an X and Y configuration, enable the endovascular treatment of wide-necked complex intracr...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2019.9.JNS191733
更新日期:2019-12-06 00:00:00
abstract::The authors report the case of a 6-year-old boy with cerebral sparganosis due to infection with a plerocercoid tapeworm larva of Spirometra mansoni. Magnetic resonance imaging revealed an area of irregular long T2 signal in the right frontal lobe. When compared with images obtained 2 years earlier, the lesion appeared...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/ped.2006.105.6.470
更新日期:2006-12-01 00:00:00
abstract::Spinal cord infarction in association with pneumococcal meningitis has not been previously recognized. The case is reported of a 5 1/2-year-old boy who had Streptococcus pneumoniae meningitis complicated by the sudden onset of flaccid paraplegia and loss of all sensory modalities below the level of T-2. At operation, ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1981.55.1.0121
更新日期:1981-07-01 00:00:00
abstract:OBJECT:Infiltrative tumor resection is based on regional (macroscopic) imaging identification of tumorous tissue and the attempt to delineate invasive tumor margins in macroscopically normal-appearing tissue, while preserving normal brain tissue. The authors tested miniaturized confocal fiberoptic endomicroscopy by usi...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2011.8.JNS11559
更新日期:2011-12-01 00:00:00
abstract::Schwannomas of the brain parenchyma are extremely rare, occurring mostly in children and young adults. Fewer than 50 cases have been reported in the English-language literature. Isolated temporal lobe epilepsy is a rare presentation of intracerebral schwannomas, with only 2 reported cases. The authors present the case...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2012.3.JNS111043
更新日期:2012-07-01 00:00:00
abstract:OBJECT:The goal of this study was to find which central nervous system (CNS) pathways are involved in volitional control over reinnervated biceps or pectoral muscles. METHODS:Intercostal nerves (ICNs) were coapted to the musculocutaneous nerve (MCN) or the medial pectoral nerve (MPN) in 23 patients with root avulsions...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1998.89.4.0568
更新日期:1998-10-01 00:00:00
abstract::OBJECTIVE In severe traumatic brain injury (TBI), the effects of decompressive craniectomy (DC) on brain tissue oxygen pressure (PbtO2) and outcome are unclear. The authors aimed to investigate whether changes in PbtO2 after DC could be used as an independent prognostic factor. METHODS The authors conducted a retrospe...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2017.1.JNS161840
更新日期:2018-05-01 00:00:00
abstract::Intravascular papillary endothelial hyperplasia (IPEH), commonly known as Masson's tumor, is a benign lesion that manifests as an excessive proliferation of endothelial cells within a vessel wall. IPEH is extremely rare in the brain, with only 36 intracranial cases previously described in the literature. It is commonl...
journal_title:Journal of neurosurgery
pub_type:
doi:10.3171/2019.8.JNS191767
更新日期:2019-11-01 00:00:00
abstract::The fibrinolytic activity in cerebrospinal fluid has been monitored by determination of levels of fibrin split products (FSP) in 23 patients with ruptured intracranial aneurysms. In 20 of these 23, FSP was found in the cerebrospinal fluid (CSF), with levels ranging from 10 to 80 micrograms/ml. Eleven of the 23 patient...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1980.52.4.0453
更新日期:1980-04-01 00:00:00
abstract::Prolonged coma following severe head injury is a serious condition because it implies a poor prognosis. In order to assess the magnitude of this phenomenon, the authors have reviewed 135 cases of posttraumatic unconsciousness lasting more than 2 weeks, from among the entire propulation of patients with severe head inj...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1980.52.5.0625
更新日期:1980-05-01 00:00:00
abstract:OBJECT:The formation of cerebral aneurysms involves complex processes and little is known about the mechanisms by which they originate, grow, and rupture. The purpose of this study was to identify early ultrastructural morphological changes that lead to the formation of experimental cerebral aneurysms. METHODS:Twenty ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.2005.102.3.0532
更新日期:2005-03-01 00:00:00
abstract::The authors demonstrate the use of cottonoid as a marker for ultrasound localization of a subcortical tumor. ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1984.60.2.0438
更新日期:1984-02-01 00:00:00
abstract:OBJECT:The difference in the hemodynamics of wall shear stress (WSS) and oscillatory shear index (OSI) between ruptured and unruptured aneurysms is not well understood. The authors investigated the hemodynamic similarities and dissimilarities in ruptured and thin-walled unruptured aneurysm blebs. METHODS:Magnetic reso...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2012.7.JNS111991
更新日期:2012-10-01 00:00:00
abstract:OBJECTIVE:This study aimed to assess longitudinal changes in the collateral channels originating from the lenticulostriate artery (LSA), posterior communicating artery (PCoA), and anterior and posterior choroidal arteries (AChA and PChA, respectively) during disease progression and/or aging. The impact of collateral ch...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2017.9.JNS172231
更新日期:2018-03-23 00:00:00
abstract::Nine patients with a peripheral nerve lesion (six intrinsic and three extrinsic) were evaluated with computerized tomography (CT). In all but one instance, the CT scans gave useful information regarding the anatomical location, size, and relationship of the lesion to surrounding structures. These cases illustrate the ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1983.59.1.0131
更新日期:1983-07-01 00:00:00
abstract::A model of transient hindbrain ischemia in Mongolian gerbils is described. The vertebrobasilar junction of gerbils was exposed by a transcervical approach through the space between the atlas and occipital bone. The origin of the basilar artery was occluded by a clip, and the local cerebral blood flow (CBF) was measure...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1984.60.5.1054
更新日期:1984-05-01 00:00:00
abstract::A patient with findings of bilateral cortical blindness and a unilateral carotid bruit is reported. A persistent trigeminal artery allowed emboli from a unilateral ulcerated internal carotid plaque to affect the visual cortex bilaterally. The angiographic findings and a brief discussion of this anomalous artery are pr...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1980.52.5.0709
更新日期:1980-05-01 00:00:00