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The pulmonary capillary wedge pressure or PCWP (also called the pulmonary wedge pressure or PWP, or pulmonary artery occlusion pressure or PAOP) is the pressure measured by wedging a pulmonary catheter with an inflated balloon into a small pulmonary arterial branch.

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pulmonary artery catheter | Pulmonary wedge pressure; Pulmonary Artery Wedge Pressure; Pulmonary ...To assess gas exchange at the tissues you would sample blood from the PULMONARY ARTERY b/c you need to wait until after all the blood from all the capillary beds mixes together which is only complete in the pulmonary artery.

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PAWP is pulmonary artery wedge pressure.  It measures pressures generated by the left ventricle.  It is used to assess left ventricular function.  Normal PAWP is 8-12 mmHg.  PAWP is  increased in left ventricular failure and pericardial tamponade.  It is decreased in hypovolemia.  ~ PAWP reflects LVEDP under normal conditions, that is, when LVEDP (ventricular preload) is increased, PAWP is  increased also.

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Hemodynamics Cheat Sheet: Cardiac Output/Index, Mean Arterial Pressure (MAP), Pulmonary Arterial Diastolic Pressure (PAD), Pulmonary Arterial Mean Pressure (PAM), Pulmonary Arterial Systolic Pressure (PAS), Pulmonary Artery Wedge Pressure (PAWP), Pulmonary Vascular Resistance (PVR), Right Arterial Pressure (RAP), Stroke Volume/Index (SV/SVI), Systematic Vascular Resistance/Index (SVR/SVRI) | Hemodynamic Monitoring for Critical Care Nursing @iStudentNurse #NurseHacks::

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