Abstract: A method of administering a liquid pharmaceutical formulation, particularly a surfactant formulation, to at least one lung of a subject in need of such treatment is disclosed. The method is carried out while the subject has a breathing tube extending through the subject's mouth and larynx, and while ventilating at least one lung of the subject through the breathing tube. The method comprises simultaneously administering the liquid pharmaceutical formulation down the breathing tube and into at least one lung of the subject and ventilating at least one lung of the subject through the breathing tube. The method may be performed on premature infants to combat respiratory distress syndrome.

Abstract: The present invention is concerned with the use of a compound of formula (I) ##STR1## wherein --W-- is ##STR2## wherein Z is --V(CH.sub.2).sub.b CO.sub.2 H where b is 1 or 2 and V is oxygen when b is 1 or methylene when b is 2;X is hydrogen, cyano, or --C.tbd.CH; andthe dotted line represents an optional double bond;and physiologically functional derivatives thereof,in the treatment of congestive heart failure.

Abstract: A method of administering a liquid pharmaceutical formulation, particularly a surfactant formulation, to at least one lung of a subject in need of such treatment is disclosed. The method is carried out while the subject has a breathing tube extending through the subject's mouth and larynx, and while ventilating at least one lung of the subject through the breathing tube. The method comprises simultaneously administering the liquid pharmaceutical formulation down the breathing tube and into at least one lung of the subject and ventilating at least one lung of the subject through the breathing tube. The method may be performed on premature infants to combat respiratory distress syndrome.

Abstract: The present invention is concerned with methods for the prophylaxis, treatment and diagnosis of pulmonary hypertension which comprise the administrative of an effective amount of a compound of formula (I) ##STR1## wherein a is an integer of from 1 to 3; X and Y, which may be the same or different, are selected from --O-- and --CH.sub.2 --;R is --(CH.sub.2).sub.5 R.sup.1 wherein R.sup.1 is hydrogen or methyl, or R is cyclohexyl, orR is --CH(CH.sub.3)CH.sub.2 C.tbd.CCH.sub.3 ; andthe dotted line represents an optional double bond;or of a physiologically acceptable salt or acid derivative thereof.Medicaments and diagnostic aids for use in the methods of the invention are also within the scope of the invention.