Pulmonary wedge pressure corresponds to which of the following: (DNB Jun-2008)
|A||Right ventricular pressure|
|B||Left ventricular pressure|
|C||Left atrial pressure|
|D||Right atrial pressure|
I. PULMONARY WEDGE PRESSUREIS the pressure measured in the pulmonary artery at its capillary end.
II. A catheter (SwanGaz catheter) is positioned in the pulmonary artery, and the distal portion of the catheter is isolated from pressure behind it in the artery by inflating a balloon .
III. This makes the catheter to float into a” WEDGED POSITION “, and allows sensing of transmission of pressures in front of the catheter (in the pulmonary capillary bed) by the transducer.
IV. Because there is no valve between this location and the left atrium, the measurement reflects LEFT ATRIAL PRESSURE Q