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1. The present study conducted on paediatric patients shows that ultrasonography offers a better alternative than the frequently used age-based formula while selecting an appropriate sized uncuffed endotracheal tube which would provide optimal fit and ventilation. 2. Better prediction of endotracheal tube size is associated with limited number of laryngoscopies and tube changes which reduces the incidence of trauma to the upper airway. 3. Ultrasound assisted assessment of subglottic diameter is easy to learn and apply and they can be performed at the bedside whenever required. ...

This book consists of four chapters. The first chapter deals with the general introduction along with literature survey up to 2006 of Mn (III) complexes with oxygen and nitrogen donor atom ligands. 317 references have been cited in this chapter. The second chapter consists of the experimental details for the synthesis of the complexes containing -diketone (acetylacetone) and ethylenediamine, propylenediamine, hexamethylenediamine. The separation and purification procedures are also given in this chapter. In the third chapter the main results obtained during the present work are given and they...