Chest
-
Comparative Study
Corrected end-tidal P(CO(2)) accurately estimates Pa(CO(2)) at rest and during exercise in morbidly obese adults.
Obesity affects lung function and gas exchange and imposes mechanical ventilatory limitations during exercise that could disrupt the predictability of Pa(CO(2)) from end-tidal P(CO(2)) (P(ETCO(2))), an important clinical tool for assessing gas exchange efficiency during exercise testing. Pa(CO(2)) has been estimated during exercise with good accuracy in normal-weight individuals by using a correction equation developed by Jones and colleagues (P(JCO(2)) = 5.5 + 0.9 x P(ETCO(2)) – 2.1 x tidal volume). The purpose of this project was to determine the accuracy of Pa(CO(2)) estimations from P(ETCO(2)) and P(JCO(2)) values at rest and at submaximal and peak exercise in morbidly obese adults. ⋯ P(JCO(2)) provides a better estimate of Pa(CO(2)) than P(ETCO(2)) during submaximal exercise and at peak exercise, whereas at rest both yield reasonable estimates in morbidly obese individuals. Clinicians and physiologists can obtain accurate estimations of Pa(CO(2)) in morbidly obese individuals by using P(JCO(2)).
-
We report a case of recurrent hemoptysis due to an occult congenital fistula between the descending aorta and the left pulmonary vein in a 25-year-old female patient. The anomaly was confirmed by contrast-enhanced CT scan and angiography. ⋯ The patient was successfully managed by simple ligation of the fistula. To our knowledge, this is the first reported case of adult-onset hemoptysis caused by an occult congenital fistula between the descending aorta and a pulmonary vein.
-
The objective of this study was to assess the frequency of mediastinal lymphadenopathy in patients with idiopathic pulmonary arterial hypertension (IPAH) and describe the correlative clinical features. ⋯ MLAD without other identifiable causes is seen in approximately one in fi ve patients with IPAH and is associated with pleural effusion but not mPAP, RAP, or left ventricular function.