Hemodynamics — Flashcards

Flashcard 221: The Starling equation for fluid flow (Jv) is:

Answer: Kf [(Pc - Pi) - σ(πc - πi)]

Extra: Kf = Filtration coefficient (capillary permeability) Pc = Capillary hydrostatic pressure Pi = Interstitial hydrostatic pressure σ = Reflection coefficient (permeability to protein) πc = Capillary oncotic pressure πi = Interstitial oncotic pressure

Flashcard 222: Shear is lowest at the _____ of a blood vessel

Answer: center

Flashcard 223: How does hematocrit change with isosmotic diarrhea? _____

Answer: Increased

Flashcard 224: How does plasma protein concentration change with diarrhea? _____

Answer: Increased

Flashcard 225: TXA2 causes vaso-_____

Answer: constriction

Flashcard 226: _____ is a consequence of adjacent layers of blood traveling at different velocities within a blood vessel

Answer: Shear

Flashcard 227: What equation may be used to calculate the pulmonary vascular resistance (PVR)? PVR = _____

Answer: (Ppulm artery - PL atrium) / cardiac output

Flashcard 228: Any factor that causes increased _____ pressure will cause coronary sinus dilation

Answer: right atrial

Flashcard 229: In response to decreased afferent baroreceptor firing, there is _____ efferent sympathetic firing (baroreceptor reflex)

Answer: increased

Flashcard 230: How do PCWP and preload change during hypovolemic shock?_____

Answer: Severely decreased