Biomedical subjects

V Popa

Publications and source records attributed to V Popa.

93 records · Page 6Linked to original sources

PubMedDate not supplied

Ultrasonographic study of normal and pathological hemodynamics in the arterial vertebro-basilar system.

The velocimetric complexes of vertebral arteries were studied following up 4 parameters of the frequency spectrum: peak of systolic velocity-PSV; end systolic velocity-ESV; mean diastolic velocity MDV; end diastolic velocity EDV. According to this study, it seems that MDV related to PSV is more indicated than EDV to appreciate cerebrovascular resistance. The increase of MDV related to the systolic velocity is more constant and ample from segment V1 to segment V3, compared with the increase of EDV. Thus, to appreciate circulatory resistance at downgrade, instead of Pourcelot value, there can be used the relation MDV/PSV or their difference related to PSV because MDV follows the variations PSV more exactly than EDV.

Adult↗

PubMedDate not supplied

The influence of moderate hyperbaric environment on some nervous functions and on the sympatho-adrenal and adreno-cortical activity in man.

Thirteen healthy males were repeatedly studied during the exposure to a moderate hyperbaric environment of 4--6, 7 and 9 ATA, in a hyperbaric chamber and partly during immersion in sea water (3.5--4 ATA). The maximal duration of the exposure was 35 min and that of decompression 90 min. As compared to the dynamics of the change found in controls, under hyperbaric conditions a significant prolongation of the visual reaction time (especially during sea dives), and an impairment of the mental performance in an arithemetical calculation test were found. There occurs an increase of the excretion in urine of cortisol, epinephrine and vanillylmandelic acid, especially after immersion in sea.

Adrenal Cortex Hormones↗

PubMedDate not supplied

[Thoracic sympathectomy via the thoracoscopic approach. The operative technic].

The authors describe the technique of thoracic sympathectomy by thoracoscopic approach in the variant in which the sympathetic chain is divided between T4 and T5 sympathetic ganglion associated with the division of the gray and white rami communicantes of the T2-T3-T4 sympathetic ganglions. The article emphasizes the importance of the 2nd sympathetic ganglion in the regulation of the blood circulation of the arm and the advantages of the thoracoscopic approach for this type of intervention.

Adult↗