Discusses the outlook for the use of the drug bosentan to treat pulmonary hypertension. Ineffectiveness of drugs that lower blood pressure in alleviating lung condition; Study of the effect of bosentan by Richard N. Channick and colleagues at the University of California, San Diego.D.C....
In subject area:Medicine and Dentistry Pulmonary overinflation is caused by excessive intrapulmonary pressure and over expansion of the lungs, which, in diving activities, results from the failure of expanding gases to exit the lungs. From:Bove and Davis' Diving Medicine (Fourth Edition),2004 ...
1 This occurs in lower limb flow as the iliac-caval veins transit through the abdomen with a positive pressure that varies 2 to 5 mm Hg with respiration. In obese patients, intra-abdominal pressure can be as high as 15 mm Hg.21 When external pressure is applied, the flow ...
Air enters the respiratory passageways when the pressure inside the lungs is lower than the ___. (a) arterial pressure (b) abdominal pressure (c) blood pressure (d) atmospheric pressure. Which of the following is true about...
of expiration, thus reducing the shunting of blood through the lungs and improving gas exchange. A PEEP higher than the critical closing pressure prevents alveolar collapse and can markedly improve the arterial Po2in patients with a lowered functional residual capacity, as in acute respiratory ...
These premature animals were somewhat unstable, and complete control of these variables was not attained as is shown in Table I. Immature fetuses were selected to study PEEP in abnormal lungs. An estimate of surface active material in the amniotic fluid and fetal lung liquid was made for each ...
Related to partial pressure:Partial Pressure of Oxygen in Arterial Blood,Dalton's law of partial pressure partial pressure n. The pressure that one component of a mixture of gases would exert if it were alone in a container. American Heritage® Dictionary of the English Language, Fifth Edition...
An Oxford University study has found that the lower-pressure environment experienced when flying increases blood pressure in the lungs. With an unknown but significant number of flights diverted each year for medical emergencies, the results could be used to improve health screening before flight as ...
are separated by a partition known as theinteratrial septum; the lower chambers, theventricles, are separated by theinterventricular septum. The atria receive blood from various parts of the body and pass it into the ventricles. The ventricles, in turn, pump blood to the lungs and to the rema...
Thus , to insure maximum removal of surfactant in our study, the procedure was repeated 20 times giving a total wash volume of 200 ml saline . At the end of the washings the effluent was clear and the pressure-volume curve showed poor stability. It was decided that lungs with volumes at...