[Effects of nasogastric intubation on respiratory resistance and work in newborn and premature infants].
The nasal resistance participates for almost 50 p. 100 in the resistance of airways (RVA) of the new-borns whose respiration is mainly nasal. The possibility of an oral respiration in case of partial or total occlusion of nasal way is almost null. In order to determinate the effects of a naso-gastric suction of the RVA 10 normal infants (3 prematures, 7 new-born babies) were studied by plethysmographia. The presence of the suction brought a systematic and significant increase of RVA (the coefficient of transformation = 1,318 +/- 0,21 p is less than 0,001). In the nine infants for whom the resistant work (WR) was estimated is increased proportionaly to the increase of RVA (deltaRVA) (coef. of transformation = 1,44 +/- 0,44, p is less than 0,001). However the proportional increase of WR is not systematic superior for 3 prematures and 1 new-born baby and similar in one case. These variations can be explained by various adjustments of the V. The increase of work imposed by the presence of a naso-gastric suction cannot be underestimated in particular for the prematures.
D000403:Airway Resistance; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D007440:Intubation; D007441:Intubation, Gastrointestinal; D009666:Nose; D014939:Work of Breathing
Effets d'une sonde nasogastrique sur la résistance et le travail ventilatoires du nouveau-né et du prématuré