American journal of diseases of children (1911)
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Comparative Study
Development and severity of palatal grooves in orally intubated newborns. Effect of 'soft' endotracheal tubes.
A prospective, blinded study of neonates orally intubated with either standard or "soft" endotracheal tubes included 57 infants in the standard "hard" tube group and 46 infants in the soft tube group. Infants were further divided by birth weights above and below 1,000 g. ⋯ Neither the incidence nor the severity of palatal groove formation was influenced by the use of the soft tube. However, in three cases the soft tube had to be abandoned due to technical difficulties with intubation.