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Biomedical subjects

A Primavera

Publications and source records attributed to A Primavera.

At least 19 recordsLinked to original sources
PubMed1992

Metallic fragment embolization to the middle cerebral artery.

A 25-year-old male was wounded accidentally in the neck by a metallic fragment, which penetrated his right carotid artery and migrated within the ipsilateral middle cerebral artery. Clinical and laboratory findings over a 16-month-period are reported. Problems arising from the presence of metallic emboli to the cerebral circulation are discussed on the basis of the pertinent literature.

Adult↗
PubMed1992

Microbiological considerations of the etiological agents of lower respiratory tract infections.

One hundred eight-four sputum specimens from the same number of patients with lower respiratory tract infections were examined to determine the bacterial count and the relationship between the microorganisms isolated and the presumptive pathology. The sputa were subdivided into three groups; "high probability", "low probability", and "contaminated sputa", following the criteria of the microscopic readings: sputum with more than 25 white cells and low numbers of squamous epithelial cells represents true lower respiratory tract infections (high probability); those with fewer than 25 white cells represent non-bacterial infections or non-infected sputa (low probability) while sputa with more than 25 squamous cells per field represent contaminated specimens (contaminated sputa). Statistical analysis was carried out to correlate these data. Haemophilus influenzae, Haemophilus parainfluenzae, Streptococcus pneumoniae, and Streptococcus pyogenes showed significant differences in the three groups considered.

Gram-Negative Bacteria↗
PubMed1992

Prognosis of transient global amnesia: a long-term follow-up study.

A long-term follow-up study was performed on patients with transient global amnesia (TGA) in order to evaluate the prognosis, the recurrence rate and the occurrence of stroke and dementia. 102 patients (57 women, 45 men; mean age 62.8 +/- 9.4 years) were prospectively included and followed up. The follow-up duration ranged between 12 and 241 months with an average value of 82.2 +/- 51.1 (mean +/- SD). The death rate showed no difference from that of sex- and age-matched subjects. TGA recurred in 19 cases (18.63%). Only 4 patients suffered subsequent stroke, and only 3 showed intellectual deterioration. TGA prognosis was shown to be better than that of RIA and lacunar patients.

Adult↗
PubMed1992

Quantitative electroencephalography in Parkinson's disease, dementia, depression and normal aging.

The relationship between depression and dementia in Parkinson's disease (PD) has rarely been explored. Using a quantitative EEG (qEEG) parameter, we studied four groups of subjects: PD, demented Alzheimer's type and major depressed patients and normal controls. The qEEG data were compared with those of the Mini-Mental State and the Hamilton Depression Scale. The qEEG pattern was different in the four groups of subjects. Moreover, there was a significant correlation between the qEEG data and the other variables, and, particularly, with the cognitive performances. Our findings demonstrate that the qEEG method of assessment may give valuable data for a better classification of dementia syndromes and for a distinction between dementia and pseudodementia.

Aged↗
PubMed1990

Thyrotoxic encephalopathy and recurrent seizures.

Epilepsy is a rare but possible manifestation of thyrotoxicosis. The patient reported here developed recurrent, generalized and focal seizures, as presenting symptoms of a thyrotoxic encephalopathy. Intercritic EEG records showed triphasic waves. Seizures and signs of encephalopathy disappeared and the EEG reverted to normal only after treatment of the thyroid hyperfunction. It is concluded that thyroid function should be evaluated in cases of otherwise unexplained encephalopathy with untreatable seizures and triphasic waves.

Adult↗
PubMed1990

Correlation between mini-mental state examination and quantitative electroencephalography in senile dementia of Alzheimer type.

The quantified electroencephalogram (qEEG) of patients with senile dementia of the Alzheimer type (SDAT) and normal elderly subjects was related to the Mini-Mental State (MMS) score. A statistically significant correlation was observed between MMS score and some qEEG parameters. This correlation indicates that the use of adequate spectral parameters of qEEG may provide information on the cognitive impairment of elderly subjects and may reduce the false-positive rate at a neuropsychological examination.

Aged↗
PubMed1990

Triphasic waves in Alzheimer's disease.

Clinical records and EEGs of 114 consecutive patients with clinical diagnosis of Alzheimer's disease have been reviewed. The EEGs of 15 patients (13%) contained triphasic waves. Triphasic waves were always atypical as they occurred singularly or in short bursts, and/or they had occipital predominance, and/or they were bilateral but asymmetrical. Triphasic waves, in all but one patient were recorded in a state of complete alertness. No statistically significant differences were found between the triphasic waves group and the other one, with respect to age, age at onset, illness duration, presence of seizures. Myoclonus was more frequent in patients with triphasic waves (p less than 0.01). Triphasic waves patients had a higher degree of dementia (p less than 0.01), both in cases with rapidly evolving disease and in subjects with relatively slow clinical course.

Aged↗
PubMed1989

In vivo ESR dosimetry in total body irradiation.

Total body irradiation (TBI) using high doses (about 10 Gy) with photons in the range between 1 and 10 MV combined with intensive chemotherapy has been used successfully in treatment of acute and chronic leukemia before bone marrow transplantation. One of the principal international guidelines in TBI is to use in vivo dosimetry in order to compare the prescribed dose with that absorbed. The use of in vivo dosimetry is also useful as a retrospective evaluation of any deviation from the prescribed dose greater than +/- 5% for relevant parts of the body, especially in the lung and in other organs at risk. In this paper, Electron Spin Resonance (ESR), using alanine dosimeters, is demonstrated to be a powerful tool for absorbed dose evaluation in TBI by detection of free radicals produced in alanine by ionizing radiation. In this study, we present the results obtained using ESR dosimetry in eleven patients undergoing TBI. The major advantages appear to be: 1. the ESR signal in alanine dosimetry is stable for years without fading: 2. the detection of the ESR signal does not destroy the information and so enables a retrospective judgment of the TBI plan adopted.

Alanine↗
PubMed1979

[Parenteral penicillin in rats: an experimental model of periodic EEG activity].

Parenteral G Penicillin has been administered to 10 rats and EEG pattern has been recorded. High voltage spikes appeared on one hemisphere, 12 to 25 minutes after injections. Gradually spike frequency and voltage increased till periodical EEG was observed on both hemispheres. Such activity was synchronous, symmetrical, stereotyped and often accompanied by myoclonias. This pattern lasted from 45 to 100 minutes. The authors underline the analogies with the Ouabain model of epilepsy and with periodical EEG patterns in man.

Animals↗
PubMed1979

Tendency to periodic recurrence of EEG changes in Lafora's disease. Case report.

A young male patient affected with Lafora's disease and concomitant mental deterioration, myoclonic jerks and epileptic seizures is reported. A cerebral biopsy showed round PAS-positive myoclonus bodies in nerve cells and neuropile. A tendency to periodic recurrence of paroxysmal activity in the EEG tracings, an unusual finding in Lafora's disease, is briefly discussed.

Adolescent↗
PubMedDate not supplied

Assessment of 99mTc-HM-PAO parameters with SPECT for improved evaluation of blood flow in cerebral lesions.

A method for investigating the linearity between blood flow and distribution of 99mTc-HM-PAO uptake in patients undergoing single photon emission computed tomography (SPECT) is presented. This method, based on particular elaboration techniques of sequential multiple acquisitions, provides a local index: cumulative transit time (CTT) related to all factors, other than blood flow, affecting 99mTc-HM-PAO uptake. Because a correct qualitative blood flow estimation is based on the uniformity of the above factors, the occurrence of a change of this index indicates a nonlinear relation between blood flow and 99mTc-HM-PAO uptake distributions. It was shown that although linearity between blood flow and 99mTc-HM-PAO uptake may be questionable, a qualitative assessment of blood flow was correct in 100% of ischemic patients. In nonischemic patients this percentage fell to 60%.

Blood Flow Velocity↗
PubMedDate not supplied

Functional circulation time images in the diagnosis of cerebral lesions by angio CT.

An application of angio CT as an adjunct to contrast enhancement evaluation of cerebral lesions is presented. We performed rapid sequential scanning following intravenous bolus injection of an iodinated contrast medium, analyzed the time contrast curves and generated a functional circulation time image. This was accomplished by calculating on a pixel-by-pixel basis the first mathematical moment of the monitored time-density curves about injection time which corresponds to regional arm brain circulation time (rABCT). This method increased the rate of detection of cerebral lesions by contrast enhancement from 30 to 90%.

Brain Diseases↗