University:
Camosun College
Course:
BIOL 252 | Pathophysiology for Nursing 1
Academic year:

2024
Views:

43

Pages:

1
Author:

Aysha A.

DBP will be lower Mean Arterial Pressure (MAP) MAP = Area under the curve DBP + 1 3 Pulse Pressure = MAP DBP+ 3 1 Pulse Pressure=MAP Example: 80 + 1 3 × 40 = 93 - 96 mmHg (Normal MAP) 80+ 3 1 ×40=93 - 96mmHg (Normal MAP) MAP represents tissue oxygenation pressure Essential MAP: ≥ 60 mmHg ≥60mmHg (hypotension) < 60 mmHg <60mmHg leads to shock Pattern of Flow Laminar Flow Flow layers are parallel, with the fastest flow at the center and slower flow near the vessel walls. Parabolic flow: Visualized as concentric layers with velocity increasing towards the center. Turbulent Flow Flow with multiple directions, causing whirlpools of blood. Reynolds number determines flow type. Reynolds Number ( R.No R.No) Reynolds No = Flow velocity × Radius of vessel × Density of blood Viscosity of blood Reynolds No= Viscosity of blood Flow velocity×Radius of vessel×Density of blood R.No ≈ 2000 R.No≈2000 < 2000 <2000 indicates laminar flow 2000 − 3000 2000−3000 indicates bifurcation (transition) between laminar and turbulent flow > 3000 >3000 indicates turbulent flow At N.R ≈ 1000 N.R≈1000, the flow is laminar At branching, R.No ≈ 2000 − 4000 R.No≈2000−4000, but it is turbulent flow.