Preguntas

Apuntes

An investigator is studying the regulation of pulmonary lymphatic flow using an animal model. Catheters are implanted in the femoral vein , pulmonary artery , and main lymphatic vessel draining the lungs in anesthetized , intubated , mechanically ventilated animals. Drugs may be injected directly into the pulmonary artery catheter and inspired gas mixtures altered at the ventilator ; timed collection of lymph from the catheters is used to calculate lymphatic flow. Which of the following interventions will most likely increase the flow of pulmonary lymph in these animals? a) Administration of endothelin-1 into the pulmonary artery b) Administration of phenylephrine into the pulmonary artery c) Decreasing the inspired oxygen concentration from 21% to 10% d) Increasing the inspired carbon dioxide concentration from 0.3% to 3% e) Intravenous infusion of 0.9% saline for 5 minutes f) Intravenous infusion of 20% albumin solution (20 g/ 100 mL saline) for 5 minutes e) Intravenous infusion of 0.9% saline for 5 minutes Movement of fluid between capillaries and the lymphatic system is dependent on the hydrostatic and oncotic pressures of both capillary and intestitial compartaments. High capi...