Hydrocephalus and Venous Hypertension

The role of raised venous pressure as an etio-logical factor in the development of hydro-cephalus has been highlighted in a number of clinical conditions [8], Achondroplasia and syndromic craniosynostosis (e.g. Crouzon and Cloverleaf skull) being the most commonly referred to. The mechanism is thought to be

Fig. 24.1. Loculation of the lateral ventricles following bacterial meningitis.

deformity at the skull base, resulting in narrowing of the jugular foramina and impairment of intracranial venous drainage [9]. The raised pressure within the cranial venous sinuses reduces the pressure gradient across the arachnoid villi and granulations impairing the absorption of CSF. In the infant with open sutures and immature myelination, progressive dilatation of the ventricles occurs in these circumstances. By contrast, once the sutures have fused and the cranium is less distensible, a picture more akin to pseudotumor cerebri results.

Hydrocephalus commonly accompanies vein of Galen aneurysms. Again, the mechanism is in part the result raised of venous pressure due to arteriovenous shunting. In this instance, shunting the ventricles may be both harmful and unnecessary, since once the primary anomaly has been treated, the hydrocephalus may come under control.

Cure Your Yeast Infection For Good

Cure Your Yeast Infection For Good

The term vaginitis is one that is applied to any inflammation or infection of the vagina, and there are many different conditions that are categorized together under this ‘broad’ heading, including bacterial vaginosis, trichomoniasis and non-infectious vaginitis.

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