Hysteresis of the nasal airway pressure-flow relationship (PFR) is seen during hyperpnea, with lower nasal resistance during increasing inspiratory flow than during decreasing flow. We hypothesized that the nasal PFR hysteresis arose in the nasal vestibule airway because of progressive collapse during the inspiration. We measured the inspiratory transnasal and transvestibular PFR for one nasal ...

INTRODUCTION Use of submicrometer particles combined with condensational growth techniques has been proposed to reduce drug losses within components of high-flow nasal cannula therapy systems and to enhance the dose reaching the lower respiratory tract. These methods have been evaluated using continuous inhalation flow rather than realistic inhalation/exhalation breathing cycles. The goal of th...

Nasal filter efficiency for particles has been described by several authors as showing large individual variations, probably somehow related to airflow resistance. Twelve children, aged 5.5-11.5 yrs and 8 aged 12-15 yrs were compared to a group of ten adults. Deposition of polystyrene beads (1, 2.05, 2.8 microns mass median aerodynamic diameter (MMAD] was measured by comparing inhaled aerosols ...

BACKGROUND It is often assumed that horses with mild respiratory clinical signs, such as mucous nasal discharge and occasional coughing, have an increased risk of developing recurrent airway obstruction (RAO). HYPOTHESIS Compared to horses without any clinical signs of respiratory disease, those with occasional coughing, mucous nasal discharge, or both have an increased risk of developing sig...

The influence of mouth breathing on craniofacial development has previously been demonstrated. Recent investigations do indicate, however, that head posture also might be related to craniofacial morphology. The aim of the present study was to analyze the effect of a topical steroid spray (Budesonide) on nasal respiratory resistance and head posture in children with asthma and nasal obstruction....

METHODS: 60 patients who had non-melanocytic skin cancer on the only nasal tip were included in this study. There was no previous history of nasal surgery, allergic rhinitis, concha hypertrophy and other breathing problems in any patients. Six patients were treated with forehead flap, ten patients nasolabial island flap, twenty patients bilobe flap that based on inferior, 24 patients bilobe fla...

The change in airway resistance along the nasal passage can be determined by passing a pressure sensing cannula carefully along the passage and determining the pressure-flow relationships during quiet breathing (Bridger and Proctor, 1970). Using this technique, Haight and Cole (1983b) clearly demonstrated that the major site of nasal resistance lies at the anterior end of the inferior turbinate...

METHODS: 60 patients who had non-melanocytic skin cancer on the only nasal tip were included in this study. There was no previous history of nasal surgery, allergic rhinitis, concha hypertrophy and other breathing problems in any patients. Six patients were treated with forehead flap, ten patients nasolabial island flap, twenty patients bilobe flap that based on inferior, 24 patients bilobe fla...