Prevalence of and factors affecting pulmonary hypertension in hemodialysis patients.

Background: Pulmonary hypertension (PH) has been reported to be high among end-stage renal disease (ESRD) patients.

Objectives: The aim of this study was to investigate the role of arteriovenous fistula (AVF) flow in the pathogenesis of PH and the prevalence of PH in patients with chronic renal failure (CRF) and to suggest other possible etiologic factors.

Methods: The prevalence of PH was prospectively estimated by Doppler echocardiography in 116 ESRD patients on regular hemodialysis (HD).

Bilateral orbital emphysema and pneumocephalus as a result of accidental compressed air exposure.

Orbital emphysema is a rare condition in the absence of trauma or sinus disease. A 22-year-old man suffering from left orbital trauma due to sudden exposure to compressed air tube was admitted with severe pain in the left eye, swelling, and mild periorbital ecchymosis. Physical examination revealed a large conjunctival laceration in the left orbit.