Technical considerations for inhaled nitric oxide therapy: time response to nitric oxide dosing changes and formation of nitrogen dioxide.

Unlabelled: The aim of the present study was to analyse the time response to nitric oxide (NO) dosing changes as well as the formation of nitrogen dioxide (NO2) with different ventilation systems, respirator settings and application sites during NO inhalation. The inspired NO and NO2 concentrations were continuously measured using chemiluminiscence within a dummy ventilatory system equipped with two different respirator systems (Siemens Servo 900c and Bear BP 2001). NO was either introduced into the afferent limb of the ventilatory circuit close to the endotracheal tube (site A) or into the so-called low pressure port of the Servo 900c respirator, far away from the endotracheal tube (site B).

[Neurosecretoric nerve-cell choristoma in the anterior pituitary (author's transl)].

Report on a blastomatous dysgenesia (choristoma) with dystopic accumulation of neurosecretoric nerve-cells in the anterior lobe of hypophysis of a 65 years old woman without clinical symptoms.