The MRTX portable lightweight respirator (MRTX) provides noninvasive respiratory support using biphasic extrathoracic ventilation via a cuirass fitted around the patient's chest.The aim of the study is to evaluate the efficacy of the MRTX during dental treatment under deep sedation in comparison with the conventional treatment where children are only under monitor and only intervention is done when required.Twenty healthy children (ASA1) will wear the cuirass. PO2 saturation and ETCO2 will be recorded as a baseline. Half of the children will be ventilated (with similar values to those of physiologic respiration) and the other half will notThe study is blind, since the anesthesiologist and the dentist would not know if the cuirass of the child is connected to the MRTX or not: Group 1- 10 children with the cuirass will be connected to the MRTX and artificially ventilated at pressures of (-12/+5) at a rate of 20 per minute, and PO2 and ETCO2 will be recorded every 5 minutes. Group 2- 10 children with the cuirass will not be connected to the MRTX, but the machine will work at the same condition. Same records of PO2 and ETCO2 will be registered.
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scores of vital signs with capnograph and pulse oximeter will be recorded at baseline and every five minutes
Timeframe: one session