Pilot study of 10 preterm, who are going to be randomly placed to 3 phases : 2 hour of basal observation of respiratory rate, heart rate, saturation, NIPS and aEEG recording, 2 hours with a 20cycles/minute with "scare ventilator", and 2 hours of 40 cycles/minute with "scare ventilator"

With this pilot study the investigator's want to see if the "scare respirator" can modify the vital signs of the newborn (NB) and if there is a relationship according to the frequency per minute given by the scare respirator and the patient's respiratory rate.

The "scare respirator" has been used many times to prevent central apnea in the newborn. This involves using a mechanical ventilator, but instead of connecting it to the patient's trachea to inflate his lungs, the air flow is connected to a surgical glove that inflates and deflates, with the optimal respiratory rate that the patient should have. This will be placed on the back to stimulate it tactically giving the necessary impulse of inspiration so that the patient alone can acquire the movement.

The importance of the development of this study is that it has been seen that the "scare respirator" could avoid central apneas, but no studies have been done on the change in respiratory rate that occurs with the device or if it bothers the NB or alters its wakefulness sleep pattern.

It is intended to evaluate 10 premature infants, during 3 observation periods. Heart rate (HR), Respiratory rate (RR) and saturation, pain scale and aEEG sleep wake pattern will be evaluated; first a rest period between feeds as baseline, then with a scare respirator at 20 cycles per minute and finally at 40 cycles per minute. The differences of qualitative and quantitative variables will be assessed with ad-hoc statistical tests.

Inclusion Criteria:

• hospitalized healthy preterm babies,
• weighing more than 1500g at the time of the study

Exclusion Criteria:

• babies receiving any respiratory support
• carrier of any mayor malformation or genetic condition