Biomedical subjects

M V Lopez

Publications and source records attributed to M V Lopez.

6 recordsLinked to original sources

PubMed2006

Prevalence of oxygen desaturation and use of oxygen at home in adults at sea level and at moderate altitude.

The aim of this study was to determine the prevalence of oxygen desaturation in adults aged>or=40 yrs as altitude above sea level increases. A population-based, cross-sectional study with a multistage cluster sampling of 1,063 subjects from metropolitan Mexico City (Mexico; 2,240 m above sea level), 1,357 from Caracas (Venezuela; 950 m) and 943 from Montevideo (Uruguay; 35 m). The mean of six measurements of arterial oxygen saturation (SP,O2) was estimated using a pulse oximeter. Mean SP,O2 decreased with altitude. No subject from Montevideo had a mean SP,O2 88%. In conclusion, the prevalence of hypoxaemia was closely related to altitude. Priorities for oxygen prescription must be defined in moderate altitudes because it is unfeasible to provide it to all subjects fulfilling the criteria commonly used.

Altitude↗

PubMed1991

Sonographic aspects of pseudoxanthoma elasticum.

We describe a case of pseudo-xanthoma elasticum (PE) in a child with distinctive skin lesions without other symptoms. Renal ultrasonography showed a characteristic pattern of dotted increased echogenicity in the corticomedullary junction. Pancreas and spleen had similar echographic findings. We point out the importance of ultrasonography in the diagnosis of this rare disorder.

Child↗

PubMed1986

Severe stuttering associated with right hemisphere lesion.

Following a right hemisphere stroke, a right-handed, 50-year-old male experienced a permanent dysfluency characterized by phoneme and syllable reiterations and, to a lesser extent, word and phrase reiterations. The reiterations occurred in initial, medial, and final positions and for all sentence elements (e.g., subject nouns, object nouns, verbs, modifiers). There was a notable loss of verbal automatisms (poems, songs, etc.). The patient's symptoms conform to the acquired stuttering syndrome described by A. Helm, R. Butler, and D.F. Benson (1978, Neurology, 28, 1159-1165).

Cerebrovascular Disorders↗

PubMed1984

Transcortical motor aphasia: one or two aphasias?

The name "transcortical motor aphasia" has been used to refer to two different types of language alterations: damage in the left supplementary motor area and Luria's dynamic aphasia. It is proposed that they represent two types of language disturbances different enough to be considered two different forms of aphasia.

Aphasia↗

PubMedDate not supplied

Paroxysmal aphasias.

Forty cases of paroxysmal aphasia were found in a sample of 4,000 patients with epilepsy. Twenty-five had structural brain damage demonstrated by CT scan. Except for two cases, the epileptic focus was located in the left hemisphere. Two patients had a paroxysmal alexia associated with the aphasic disorder. Though preliminary, our data suggest a correlation of dysphasic components with posterior lesions and phonatory components with anterior lesions.

Adolescent↗

PubMedDate not supplied

[Not Available].

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Demography↗