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Duration - 3:55

Physiology Fundamentals: Mean Arterial Pressure

In this episode, Cardiovascular Nurse Practitioner Valerie Dziados, MSN, CRNP, ANP-C, AGACNP-C explains what mean arterial pressure (MAP) is, why it is an important piece of clinical information, what to expect in terms of treatment, and some easy methods of how to calculate MAP.

Duration - 6:24

Physiology Fundamentals: Third Spacing

In healthy patients, most fluids are confined in three spaces of the body: the intravascular space (in the blood vessels), the intracellular space (in the cells), or the interstitial spaces. The interstitial spaces are the small spaces between cells that are not contained within blood vessels. In normal situations, fluid moves between all three spaces to maintain fluid balance. Third-spacing occurs when too much fluid moves from the intravascular space into the interstitial or “third” space.

Reference:
Holcomb, S. (2009). Topics in Progressive Care: Third-Spacing: When Body Fluids Shifts. Nursing in Critical Care, 4(2). doi: 10.1097/01.NURSE.0000325345.22694.44