Minerva anestesiologica
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Minerva anestesiologica · Jun 2013
Randomized Controlled Trial Comparative StudyAcupuncture versus valproic acid in the prophylaxis of migraine without aura: a prospective controlled study.
The pharmacologic treatment of migraine still remains below the expectations. The aim of this study is to compare the effectiveness of traditional acupuncture and valproic acid in migraine prophylaxis. ⋯ Our data show a lower pain intensity and lower Rizatriptan intake at six-months follow-up with no adverse events in acupuncture patients compared to those treated with valproic acid.
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Given the low physical solubility of oxygen (O2) in plasma, little value is attached to hyperoxic ventilation (FiO2 1.0) as a modality for improving O2 transport and tissue oxygen supply when hypoxemia (i.e., O2 partial pressure (paO2) <60 mmHg) is absent. Because recent experimental and clinical data conflict with this notion, we used mathematical modeling to reevaluate efficacy of hyperoxic ventilation in improving tissue oxygenation in the absence of hypoxemia by specifying its theoretical efficacy in terms of hemoglobin (Hb) equivalents. ⋯ Hyperoxic ventilation establishes a highly available source of O2 that can be utilized effectively for tissue oxygenation. Although further experimental studies are required to quantify this theoretically calculated amount of utilizable O2, these results suggest that the tissue oxygenation efficacy of hyperoxic ventilation, even in absence of hypoxemia, is grossly underestimated in daily clinical practice.
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Minerva anestesiologica · Jun 2013
Improved ventilation-perfusion matching by abdominal insufflation (pneumoperitoneum) with CO2 but not with air.
Pneumoperitoneum (PP) by CO2-insufflation causes atelectasis however with maintained or even improved oxygenation. We studied the effect of abdominal insufflation by carbon dioxide (CO2) and air on gas exchange during PP. ⋯ CO2-PP enhanced the shift of blood flow towards better ventilated areas of the lung compared to Air-PP and SNP blunted the effects seen with CO2-PP. SNP may thus have blunted and CO2 potentiated vasoconstriction, by hypoxic pulmonary vasoconstriction or another mechanism.