Anesthesiology
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Randomized Controlled Trial
Aspiration Induced by Remifentanil: A Double-blind, Randomized, Crossover Study in Healthy Volunteers.
Sedation with TCI remifentanil targeting effect site concentration of 3 ng/mL resulted in detectable aspiration in almost 50% of the study participants after 1 hour.
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Randomized Controlled Trial
Intra- and Interrater Reliability of Ultrasound Assessment of Gastric Volume.
Gastric sonography can provide information about gastric content and volume that can help determine aspiration risk at the bedside. The primary objective of this study is to assess the intrarater and interrater reliability of a previously validated method of gastric volume assessment based on gastric antral area. The secondary objective is to evaluate the agreement between two different methods to measure gastric antral area. ⋯ Ultrasound assessment of gastric volume by clinical anesthesiologists is highly reproducible with high intrarater and interrater reliability. The free-tracing method to measure antral cross-sectional area is equivalent to the two-diameter method.
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Variability in labor pain has been associated with demographic, clinical, and psychological factors. Polymorphisms of the β2-adrenergic receptor gene (ADRB2) influence sensitivity to experimental pain in humans and are a risk factor for chronic pain. The authors hypothesized that polymorphisms in ADRB2 may influence labor pain. ⋯ ADRB2 genotype correlates with labor pain but explained less than 1% of the intersubject variance in the model.