The changes of endotracheal tube intracuff pressures after ear and head and neck surgery-related positions: a prospective observational study.

Introduction: The cuff of an endotracheal tube seals the airway to facilitate positive-pressure ventilation and reduce subglottic secretion aspiration. However, an increase or decrease in endotracheal tube intracuff pressure can lead to many morbidities.

Objective: The main purpose of this study is to investigate the effect of different head and neck positions on endotracheal tube intracuff pressure during ear and head and neck surgeries.

Correlated paramagnetism and interplay of magnetic and phononic degrees of freedom in 3d-5d coupled LaCuIrO.

Conventional paramagnetism-a state with finite magnetic moment per ion sans long range magnetic ordering, but with lowering temperature the moment each ion picks up a particular direction, breaking spin rotational symmetry, and results into long-range magnetic ordering. However, in systems with competing multiple degrees of freedom this conventional notion may easily break and results into short range correlation much above the global magnetic transition temperature. LaCuIrO with complex interplay of spins (s  =  1/2) on Cu site and pseudo-spin (j   =  1/2) on Ir site owing to strong spin-orbit coupling provides fertile ground to observe such correlated phenomena.

Orbiton-phonon coupling in Ir(5d ) double perovskite BaYIrO.

BaYIrO, a Mott insulator, with four valence electrons in Ir d-shell (5d ) is supposed to be non-magnetic, with J   =  0, within the atomic physics picture. However, recent suggestions of non-zero magnetism have raised some fundamental questions about its origin. We focus on the phonon dynamics, probed via Raman scattering, as a function of temperature and different incident photon energies, as an external perturbation.

A comparison of four different microleakage tests for assessment of leakage of root canal fillings.

Objective: The purpose of this study was to compare four different microleakage tests (dye leakage, electrochemical test, bacterial test and fluid filtration) for evaluation of the coronal seal of teeth obturated using Thermafil or lateral condensation techniques.

Study Design: One hundred forty-four extracted single-rooted teeth were selected and prepared. The specimens were divided into 8 experimental groups.