[Temperature variations of respiratory gases during episodes of anesthetic circuit disconnection in controlled ventilation].
Temperature variations of respiratory gases during episodes of disconnexion of the anesthetic circuit in controlled ventilation were measured with a temperature sensor located in the anesthetic circuit close to the endotracheal tube which was connected to a temperature monitor with alarm limits of 0.5 degrees C. We compared the activation times of the ventilator pressure alarm with those of the temperature. The activation time of the respirator alarm (8.9 +/- 1.6 sec) was significantly shorter (p less than 0.001) than that of the temperature monitor. This difference was more apparent when the anesthetic circuit was disconnected distantly from the sensor (10.5 +/- 1.8 sec for disconnexion between the tracheal tube and the sensor, and 36.8 +/- 12.2 sec when the disconnexion occurred at the entrance of the respiratory branch of the ventilator tubes). The maximal individual value for the activation time of the temperature alarm was 67 seconds. In all instances hemoglobin saturation (SpO2) during anesthetic circuit disconnexion was higher than 95%. In each group there was a positive and significant correlation between the temperature alarm time and the adjustment of the predetermined alarm level with respect to the basal temperature of the respiratory gases. Temperature monitorization of the respiratory gases did not offer additional advantages to the conventional monitorization of the respiratory circuit disconnexion.
Valero Castell
R
R
Servicio de Anestesiología, Reanimación y Terapéutica del Dolor, Hospital Clínic i Provincial, Barcelona.
Castillo Monsegur
J
J
Bogdanovich Díaz
A
A
Plaza Moral
A
A
D000328:Adult; D000776:Anesthesiology / Q000295:instrumentation*; D004868:Equipment Failure; D005260:Female; D005740:Gases; D006801:Humans; D008297:Male; D008875:Middle Aged; D016343:Monitoring, Intraoperative / Q000379:methods*; D012121:Respiration, Artificial; D013696:Temperature
D005740:Gases
Variaciones de la temperatura de los gases respiratorios durante los episodios de desconexión del circuito anestésico en la ventilación controlada.