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Foot Length and Optimum Orotracheal Tube Position in Neonatal Intubation

To optimise endotracheal tube placement in order to achieve successful ventilation, various nomograms are used to predict the optimum orotracheal length. Out of these, weight based nomogram is most widely used . Optimum orotracheal distance, which is the measurement from the lips to the midtrachea, being a linear measurement is likely to correlate with another linear measurement like foot length. This study was done to see if there is a correlation between foot length and optimum orotracheal length in newborns. In this prospective study, foot length and optimum orotracheal tube length was measured in 65 newborns requiring ventilation during their stay in the neonatal intensive care unit. On analysis a strong positive correlation was found between foot length and optimum orotracheal tube length with a correlation co efficient (R) = 0.845 . The regression equation can be presented as ET tube length =0.902 x FL+ 1.603. In clinical practice, many times taking foot length may be easier and faster than taking weight. Using footlength to predict lip to mid tracheal length and hence optimum orotracheal tube placement length may be a suitable alternative. Abbreviations ET endotracheal, FL foot length, NICU neonatal intensive care unit