No abstract

No abstract

We compared the cardiovascular responses between nasal and oral intubation with a fiberoptic bronchoscope under the combination of neuroleptic analgesia (NLA) and topical anesthesia. The 16 patients studied were divided into 2 groups: the nasal intubation group (N group: 8 patients) and the oral intubation group (0 group: 8 patients). There were significant changes in systolic, diastolic and mean arterial pressures in the N group and in the pressure rate quotient in the o group. Diastolic arterial pressure and heart rate were significantly higher in the N group than in the 0 group before induction of general anesthesia. The rate pressure product (RPP) was significantly higher in the N group than in the 0 group at some points during the procedure. The individual RPP in both groups was relatively stable except for one patient in the N group, who had a marked increase in RPP during the procedure. We conclude that, under the combination of NLA and topical anesthesia, the cardiovascular responses to oral flberopt.ic, intubation are less severe than those to the nasal approach. The oral approach is recommended, especially in patients with coronary artery disease, taking into consideration of the cardiovascular responses to fiberoptic intubation. (Key words: cardiovascular responses, fiberoptic intubation, orotracheal intubation, nasotracheal intubation) (Shibata Y, Okamoto K, Matsumoto M, et al.: Cardiovascular resporses to fiberoptic intubation: a comparison of orotracheal and nasotracheal intubation.

Changes in evoked spinal cord potential (ESCP) and in local spinal cord blood flow (local SCBF) were measured simultaneously in eight dogs in the course of systemic cooling and rewarming using a water mattress. PaCO2 was maintained at 35-40 mm Hg (temperature-uncorrected values) by adjusting ventilatory volume every 1 degree C change of esophageal temperature under N2O (60%)-O2-isoflurane (1.15%) anesthesia. Local SCBF and arterial blood pressure decreased and ESCP latencies increased linearly with the decrease in body temperature to 23-24 degrees C. The conductive ESCPs (non-synaptic components) showed temporary augmentation in amplitude before eventual decrease under cooling. These showed a tendency to return to the precooling baselines after the initiation of rewarming. These results demonstrate that conductive ESCPs could be available for intraoperative monitoring of spinal function under hypothermia down to 23-24 degrees C.

No abstract