PP induces a significant increase in PPV and SVV but does not alter their abilities to predict fluid responsiveness.

No abstract

Percutaneous central venous catheterization can provide reliable temporary hemodialysis access. The current study compared the hemodynamic performance of 28 coaxial catheters to 27 side by side catheters. A total of 675 dialysis sessions were evaluated to assess the flow characteristics of these two designs. The results demonstrated that the side by side catheter provided greater cumulative blood flow with more favorable venous and arterial pressures. Nevertheless, the coaxial catheter performed satisfactorily and met the minimum standards for these devices.

Using a specially designed mask and steady-state administration of the short-lived radioactive gas 81mKr, we measured the distribution of the ventilation-perfusion ratio (VA/Q) in the lungs of normal conscious standing greyhound dogs during tidal breathing. This model allows measurement of regional lung function unaffected by anesthesia and mechanical ventilation. An assessment of the distribution of VA/Q in the lungs of normal greyhound dogs revealed that topographically, ventilation and blood flow are well matched in the conscious dog.

No abstract