TY - JOUR AU - Rusk, Ronald AB - LETTERS TO THE EDITOR ANESTH ANALG 1991;72:561-7 analysis. Pulse oximetry and end-tidal carbon dioxide had been in the expected range. Our patient showed no clinical of hypovolemia during the perioperative course. evidence The vial and syringe were rechecked for correctness of dosage and content. The study by Gold et al. used nitrous oxide, oxygen, and isoflurane. Vecuronium was used if muscle relaxation was needed after intubation. Our patient was intubated, and anesthesia had been maintained for 10 min with isoflurane with a heart rate >95 beatsjmin over (220% of baseline) and a systolic blood pressure >140 mm Hg. The dose and techniques recommended by Gold et al. may be excessive when used for the treatment of intraop- erative tachycardia during maintenance of anesthesia in some patients, perhaps especially in the elderly. Personal Figure 1. Forty-eight-inch polypropylene ventilation hose ther- experience in 12 anesthetized patients (ages 23-79 yr) has mally insulated with orthopedic cast padding. demonstrated that a much lower initial dose, i.e., 0.15 mgikg (approximately 10 mg/70 kg) IV, is often ade- quate. If tachycardia persists, the same dose is repeated in ping a 48-in corrugated polypropylene ventilation hose 60 s. This technique allows rapid control and the conve- TI - Insulated Circuit Hose Improves Heated Humidifier Performance in Anesthesia Ventilation Circuits JF - Anesthesia & Analgesia DA - 1991-04-01 UR - https://www.deepdyve.com/lp/wolters-kluwer-health/insulated-circuit-hose-improves-heated-humidifier-performance-in-STw6F7pj4r SP - 566–567-566&ndash EP - ndash;567-566–567 VL - 72 IS - 4 DP - DeepDyve ER -