ABSTRACT
The most important and complex phenomenon of respiratory function of the nose is related to different nasal anatomy. The differences in facial anatomic structure between different races may also be reflected in nasal resistance and airflow. Caucasians has different facial anatomic structure which is the reflection of intranasal resistance or consequence of airflow. The active anterior rhinomanometric [AAR] is recommended for objective assessment of nasal airway resistance [NAR] in inspiration and expiration which can be calculated via nasal airflow. This study designed to evaluate the resistance of the nasal airway in Iranian samples and comparing with the standard methods. An epidemiologic case series cross sectional study was designed for 100 Iranian adult volunteer without nasal breathing problems and with AAR inclusion criteria. All subjects had to undergo a primary assessment of relevant symptoms of nasal disease and nasal examination before undergoing AAR assessment. The mean values of total nasal airway resistance sere 0/38 +/- 0/17 pa/cm[2]/s in inspiration and 0/41 +/- 0/27 pa/cm[2]/s in expiration at 150 pas pressure point. Unilateral nasal resistance in right and left in inspiration were respectively 0.88 +/- 0.69 pa/cm[2]/s and 0.90 +/- 0.57 at 150 pa/cm[2]/s pas pressure point. Also unilateral nasal resistance in right and left in expiration were respectively 0.95 +/- 0.72 pa/cm[2]/s and 0.95 +/- 0.57 pa/cm[2]/s at 150 pas pressure point. The study concluded that nasal airway resistance had the same range as the standard in different races and also no correlation exist between nasal resistance and sex, age, height, weight and smoking. Our suggestion is more epidemiologic studies if there are any queries in Iranians' airway resistance in larger sample size and wider areas
ABSTRACT
Although many studies have shown a relation between chronic otitis media [COM] and sensorineural hearing loss [SNHL], there still remains controversies about the relatinoship. The purpose of this study was to determine whether COM is associated with SNL? 127 patents met the following critera: unilateral COM and no history of head trauma, meningitis, post traumatic typmpanic membrane perforaton, coustic trauma, ototoxic drugs, previous ear surgery and systemic diseass that can affect hearing of the patients. The avarage bone conduction [6C] threshold at 500, 1000, 2000, 4000HZ separately in COM ear and normal ear was compared using the t-test and MANOVA techniques. Average BC at 500, 1000, 2000, 4000Hz in normal ear was 10.6 +/- 7.19. And 18.82 +/- 11.55 in COM ear. The differences between BC threshold at 500, 1000, 2000, 4000 HZ and average BC threshold at 500, 1000, 2000, HZ in the COM ear were statistically and probably clinically significant pvalue<0.001] COM is associated with SNHL and has clinical importance