ISSN:
1438-8359
Keywords:
Apnea
;
Artificial respiration
;
Constant-flow ventilation
;
Respiratory arrest
;
Tracheal insufflation of oxygen
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract Tracheal insufflation of oxygen (TRIO) is a technique in which oxygen is introduced into the trachea at a constant flow rate via a catheter advanced to the level of the carina. We studied the effects of flow rates (0.5, 1.0, 1.5 and 2.0 l·kg−1·min−1) on arterial blood gases during TRIO in 6 apneic dogs. The constant flow was administered through the tip of a catheter (I.D. 2.0 mm) advanced to a site of 1 cm above the carina. After 30 min of TRIO, the mean PaCO 2 at the flow rates of 0.5, 1.0, 1.5 and 2.0 l·kg−1·min−1 were 88 ± 20, 76 ± 20, 64 ± 23 and 52 ± 18 mmHg, respectively. CO2 elimination increased as the flow rates increased from 0.5 to 2.0 l·kg−1·min−1. Based on the above study, we examined the effects of TRIO at a flow rate of 3 l·kg−1·min−1 in another 5 apneic dogs. TRIO, at a flow rate of 3 l·kg−1·min−1, was able to maintain normocarbia over 4 hr. The mean PaO 2 and PaCO 2 at 4.0 hr were 465 ± 77 and 41 ± 4 mmHg. Although the mechanism of pulmonary gas exchange during TRIO is unclear, our study is the first to document that normocarbia can be maintained by high-flow TRIO in apneic dots. (Urata K, Okamoto K and Morioka T.: Respiration by tracheal insufflation of oxygen (TRIO) at high flow rates in apneic dogs. J Anesth 5: 153–159, 1991)
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s0054010050153
