Invasive Hemodynamics:

The use of invasive monitoring equipment to augment and verify hemodynamic assessments.

• Monitors must be considered an adjunct to patient evaluation and should never replace frequent bedside physical assessment.

Invasive Monitoring Devices

• Use of PA catheter and arterial line allows measurement of cardiac output and vascular pressures and blood flow for assessment of afterload and contractility

• Provides information not available through physical assessment

• Provides measurement of SvO2 of global oxygenation

Information from PA Catheter

• Directly measured

• CVP

• PA Pressure

• PAWP

• Cardiac Output

• SvO2

• Calculated from directly measured data

• stroke volume/index

• cardiac index

• SVR/PVR

• O2 delivery

Normal Hemodynamic Values

• SvO2: 60% to 75%

• Stroke Volume: 50ml to 100ml

• Stroke Index: 25ml to 45ml/beat/m²

• Cardiac Output: 4 to 8 L/min

• Cardiac Index: 2.5 to 4.0 L/min/m²

• CVP: 2 to 6 mm Hg

• PAP: 15-25/8-15mm Hg

• PAWP: 8 to 12 mm Hg

• SVR: 900 to 1300 dynes sec/cm5

Core Hemodynamic Variables

 

Variable	Assesses
stroke volume/index	pump performance
cardiac output index	blood flow
CVP/RA	filling pressure
PAWP	filling pressure
SvO2	tissue oxygenation

 

 

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