XXVIII. Congenital Osseous Obstruction of the Postnasal Orifices

Obstruction of trabecular orifices in primary open - angle glaucoma

The morphologic and structural changes undergone by the trabecular meshwork have frequently been related to the development of primary open-angle glaucoma, which consists of a sustained increase in intraocular pressure due to the accumulation of aqueous humour in the anterior chamber of the eye. The aqueous humour leaves the anterior chamber of the eye, passing through the trabecular orifices t...

Postnasal Voicing

Many of the world’s languages display a phonetic pattern whereby obstruents appear as voiced when following a nasal consonant. This article proposes a phonetic mechanism that favors postnasal voicing. The mechanism is based on two effects, which sometimes reinforce, and sometimes contradict each another. One effect is “nasal leak,” the leakage of air through a nearly closed velar port during th...

Congenital Obstruction of the Anus

Congenital Nasolacrimal Duct Obstruction

DOS Times Vol. 12, No. 10 April, 2007 Congenital nasolacrimal duct obstruction is the most common cause of epiphora in children. In the majority of cases, it is due to an obstruction at the lower end of the NLD. The Ophthalmologist should have the throrough understanding of the developmental anatomy, abnormalities of the nasolacrimal system and other congenital disorders for appropriate diagnos...

Congenital Neonatal Intestinal Obstruction

Intestinal obstructions among neonates are almost always congenital and pose a huge challenge for the neonatal as well as for the pediatric surgeons globally. The different physiological features from older children place all neonates in a unique group of population. Neonates with intestinal obstructions constitute major cause of surgical admissions in all pediatric hospitals. In a very superfi...