Articles: intubation.
-
Although the incidence of cuff induced tracheal damage has been considerably reduced by judicious use of tracheal tubes with large-volume, low-pressure cuffs, aspiration continues to be a major problem. A study was conducted to determine the maximum hydrostatic pressure that can be produced by a column of liquid above the tracheal cuff. ⋯ The maximum vertical and horizontal distance between the upper central incisor teeth and suprasternal notch was 9 cm and 21 cm respectively. The implication of these findings are discussed and it is suggested that a fixed intracuff pressure in the range of 2.5 to 3kPa should be used to obtain an optimal tracheal seal.
-
Anesthesia and analgesia · Oct 1984
Comparative StudyA suitable substitute for 4% cocaine before blind nasotracheal intubation: 3% lidocaine-0.25% phenylephrine nasal spray.
To assess the efficacy of potential substitutes for cocaine as a topical anesthetic before nasal intubation, the authors performed a double-blind study comparing the hemodynamic effects of blind nasotracheal intubation in 75 patients receiving one of three nasal sprays: 4% cocaine (C), a mixture of 3% lidocaine in 0.25% phenylephrine (L-P), and 0.25% phenylephrine alone (P). Three minutes after 0.5 ml of one of the solutions was sprayed into each nostril, anesthesia and paralysis were induced with thiopental (5 mg/kg) followed by succinylcholine (1 mg/kg); immediately after induction, mean arterial pressure (MAP) and heart rate (HR) were recorded. After blind nasotracheal intubation was accomplished, MAP and HR were recorded for 5 min while anesthesia was maintained with 70% N2O in O2. ⋯ Although mean HR decreased during the 5 min after intubation in all groups, this decrease was significantly greater (9.6 +/- 1.4 beats/min) in patients receiving L-P than in those receiving C (3.1 +/- 1.6 beats/min) or P (0.1 +/- 1.7 beats/min) (P less than 0.005). Changes in HR and MAP were similar in patients receiving C and P. There was no significant difference in the incidence or severity of epistaxis among the three groups.(ABSTRACT TRUNCATED AT 250 WORDS)
-
The results of early extubation after open heart surgery for congenital heart disease in 209 consecutive patients have been reviewed. No patient younger than 3 months of age, 52% of those between 3 and 12 months, and 88% of those older than 12 months had the tracheal tube removed in the operating theatre. Four patients required reintubation of the trachea, three because of respiratory difficulty and one because of cerebral oedema. ⋯ Twelve patients had PaO2 values less than 8.0 kPa after operation, despite adequate oxygen therapy. In four of these, this was related to persistent intracardiac shunting. It is concluded that early extubation after open heart surgery for congenital heart disease has minimal risk in carefully selected patients.