Celina R. Ortiz

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Noninvasive rebreathing measurements of pulmonary tissue volume (Vt) and pulmonary capillary blood flow (Qc) theoretically and experimentally vary with the rebreathing maneuver. To determine the cause of these variations and identify ways to minimize them, we examined the consequences of varying the volume inspired (VI), rebreathing rate (f), volume(More)
The need for fiberoptic bronchoscopy in the patient with hemoptysis and a normal or nonlocalizing chest roentgenogram remains a subject of debate. Currently, diagnostic fiberoptic bronchoscopy is recommended as the investigative procedure of choice. To develop predictors that identify the patient in whom fiberoptic bronchoscopy is most likely to be(More)
Bronchoscopic examination to diagnose lung metastases has not been as rewarding as in primary lung cancer. Despite a lower expected yield, we believe the procedure has value in certain patients, ie, those with clinical findings of endobronchial disease. To determine better the value of bronchoscopy in this population, we retrospectively reviewed records of(More)
We reviewed our experience with 115 patients with pleural effusion in whom bronchogenic carcinoma was suspected who underwent fiberoptic bronchoscopy (FOB) to identify those for whom the procedure was useful. In 6 of 12 patients with hemoptysis, 8 of 12 with a mass or infiltrate, and 8 of 18 with atelectasis with negative fluid cytology and 3 of 7 with(More)
Brain compression with subdural air causes pulmonary hypertension and noncardiogenic pulmonary edema (A. B. Malik, J. Appl. Physiol.: Respirat. Environ. Exercise Physiol. 42: 335-343, 1977). To see whether air emboli to the lungs rather than brain compression caused these findings, anesthetized dogs received intravenous air infusions, subdural air(More)
Medical science has enabled the substitution and reinforcement of body organs and tissue through the evolution of better materials. Metallic implants have been utilized to aid in injury wound healing as bone replacements, endoprosthesis, and percutaneous devices. Of concern with metallic devices is the prolonged effects and service life of the implant. It(More)
Preventive measures against CAP are important yet underused. Cost-effective preventive measures against CAP include influenza and pneumococcal vaccines, especially in patients over the age of 65 and other high-risk groups. There are now two antiviral agents, amantadine and rimantadine, that can be used both for prophylaxis and for therapy of influenza A(More)
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