Journal of anesthesia
-
Journal of anesthesia · Oct 2011
Fiberoptic-guided tracheal tube placement through the air-Q® Intubating Laryngeal Airway: a performance study in a manikin.
This study characterizes the performance and success rate for fiberoptic-guided tracheal tube placement through the air-Q(®) Intubating Laryngeal Airway (air-Q). ⋯ Fiberoptic-guided tracheal tube placement through the air-Q can be performed in a clinically acceptable period of time with high success by operators skilled in fiberoptic-guided intubation. Tracheal tube dislodgement during air-Q removal remains a potential risk that should be emphasized.
-
Journal of anesthesia · Oct 2011
Case ReportsA new modification for safer submental orotracheal intubation.
In patients in whom a tracheal tube cannot be inserted through the nostrils due to multiple facial trauma or hypoplasty of the nose, submental orotracheal intubation (SOI) is performed to avoid tracheostomy. We report a new modification for SOI to minimize the risk of apnea. A 20-year-old man was scheduled for sagittal split ramus osteotomy. ⋯ A second tube that had been confirmed, in advance, to snugly fit into the proximal end of the first tube was passed into the submental tunnel via a polypropylene cylinder and connected between the first tube and the breathing circuit. After careful withdrawal of the second tube through the submental tunnel, the first tube was directly connected to the breathing circuit after removal of the second tube. Although this technique requires additional time, apnea time is minimal even in patients in whom withdrawal of the tracheal tube through the submental tunnel takes time, because the second tube forms a link between the first tube and the breathing circuit, making it possible to ventilate the patient throughout the procedure.
-
Journal of anesthesia · Oct 2011
Effects of propofol and pentobarbital on calcium concentration in presynaptic boutons on a rat hippocampal neuron.
Numerous reports suggest that intravenously administered (IV) anesthetics affect postsynaptic events in the central nervous system. However, there is little evidence about how general anesthetics influence the presynaptic processes. The level of presynaptic calcium (Ca(2+)) concentration ([Ca(2+)](pre)) regulates neurotransmitter release. In this study, we investigated the effects of anesthetic propofol IV and the barbiturate pentobarbital on neurotransmitter release by measuring [Ca(2+)](pre) in the presynaptic nerve terminals (boutons) on a dissociated single hippocampal rat neuron. ⋯ Propofol and pentobarbital may affect neurotransmitter release from the excitatory presynaptic nerve terminals due to inhibition of increase in [Ca(2+)](pre).
-
Journal of anesthesia · Oct 2011
Letter Case ReportsPostdural puncture headache following acupuncture.