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Biomedical subjects

P Ravez

Publications and source records attributed to P Ravez.

30 records · Page 2Linked to original sources
PubMed1984

Respiratory and circulatory adaptation to isometric and dynamic exercise in chronic lung disease.

Changes at the beginning of isometric and dynamic low level exercise were studied in 23 patients with chronic lung disease. Ventilation, oxygen consumption and vascular pressures in systemic and pulmonary circulation were continuously monitored, and cardiac output was measured by thermodilution every minute. Circulatory changes took place suddenly at the beginning of isometric exercise and gradually during dynamic exercise. Ventilatory changes followed almost the same progressive pattern in both types of exercise. Ventilation increase in relation to oxygen uptake was slightly smaller during isometric exercise. Pulmonary artery pressure showed no further increase after the initial change, although ventilation was still rising.

Adaptation, Physiological↗
PubMed1980

Changes in regional and overall lung function after bronchography.

This investigation compares the effects of unilateral bronchography on classical pulmonary function parameters (spirometry, CO transfer, flow-volume curve, and arterial blood gases) and radioisotopic measurements by means of 99mTc-labeled microspheres and 81mKr. The regional changes of ventilation and perfusion were quantified by a radioisotopic index, which was established for each zone of interest: explored lung and unexplored lung. The quantitative study of regional perfusion and ventilation reveals significant reduction of ventilation for lung bases, but not for lung apices. The radioisotopic measurements show a reduction of perfusion parallel to the reduction of ventilation. There is no significant correlation between traditional pulmonary function parameters and isotopic indices. Radioisotopy proved a sensitive tool for investigation of unilateral alterations.

Adult↗
PubMed1980

[The diagnosis of upper airway obstruction by flow-volume loops (author's transl)].

The recognition of upper airway obstruction (UAO) is occurring more frequently, especially after prolonged intubation for artificial ventilation. The diagnosis of UAO may be inferred by the clinical signs or spirometry; however, these methods are not reliable. We present 4 cases of UAO to illustrate the role of the flow-volume loop in securing the correct diagnosis. These cases demonstrate the utility of the flow-volume loop as a simple technique in confirming the presence of UAO.

Aged↗
PubMedDate not supplied

[Pleural effusion revealing non-Hodgkin lymphoma. Diagnose performed by videothoracoscopy].

We report the case of a 67-year-old man with an history of pneumopathy with pleural effusion and weight loss. Exsudative lymphocytic pleural effusion was found. Thoracoscopy gave diagnosis of widespread diffuse large B-cell NHL. Talc pleurodesis and CHOP-Rituximab regimen were performed with a favorable clinical and radiological response. We discuss about lymphocytic pleural effusion, especially associated with NHL and primary pleural lymphoma.

Aged↗
PubMedDate not supplied

Left chylothorax complicating a translumbar aortography.

The authors report a case of left chylothorax after a translumbar aortography, successfully managed by conservative means. As far as they known 16 similar cases are described. They review the literature on this subject.

Aortography↗