Final Flashcards
Normal CVP
2-6
Normal PAP
25/8 or 14
Normal PCWP
6-12
Normal CO
4-8
Normal SVR
1600
Normal PVR
200
Cardiac Output Standard Equation
HR x SV
Cardiac Output Fick Equation
VO2 / Ca-Cv x 10
SV Equation
CO/HR
Cardiac Index Equation
CO / BSA
PVR Equation
[(MPAP-PCWP) / CO] x 80
MPAP (MAP) Equation
Systolic + (Diastolic x 2) / 3
SVR Equation
[(MAP-CVP) / CO] x 80
Blood pressure moves from ______ to _________
high pressures to low pressures
Flow of Blood
r heart, lungs, l heart, systemic system
Why would CVP be low and how to fix
dehydration, hypovolemia or vasoconstriction. Fix with fluids or vasoconstriction drugs
Why would CVP be high and how do you fix it
fluid overload. fix with diuretic
CVP relates to the function of________________
right heart (RH Failure, Cor Pulmonale)
When PAP is high
may be due to blockage in lungs or left heart (pulmonary embolism, air embolism, pulmonary hypertension)
How to get PCWP reading
balloon must be inflated and wedged in the pulmonary artery
PCWP relates to the function of ___________
left heart (mitral valve stenosis, CHF, Pulmonary Edema, High PEEP
Increase in C(a-v)O2 means ___________ CO
decreased
Decreased C(a-v)O2 means ______________ CO
increased
How do you treat decreased Cardiac Output
cardiac inotropic and/or chronotropic medications
SVR relates to the function of
left heart
PVR relates to the function of
right heart
PCWP is usually the same or lower than ___________
PA diastolic pressure
If (PAd-PCWP) is greater than 5, this indiciates
increased PVR
PAP greater than 35/15 means
pulmonary hypertension
What is preload
the filling pressure of the ventricle at the end of ventricular disatole
How is Pre-load estimated
by measrung the end-diastolic pressures. CVP and PAWP readings
What is contractility
the force that the ventricle generates during each cardiac cycle.
How is Contractility estimated
by using ejection fraction
Normal Ejection Fraction
65%-75%
Ejection Fraction formula
SV/EDV
What is After-load
resistance heart must overcome for blood flow to occur (PVR and SVR)
Resistance=
pressure/flow
Increased Vascular Pressure means _______ heart work
increased (opposite for decrease)
What is CVP
the pressure of blood in the right atrium or vena cava. ALso called RVEDP
What is SVR
a measure of resistance to blood flow through the systemic system circulation (left heart)
What is PVR
a measure of pulmonary vascular resistance and increases with pulmonary vasoconstriction, as seen in hypoxemia and acidosis (right heart)
Bubbling in chest tubes water seal indiates
a leak or bronchopleural fistula
How long do you leave a chest tube in
48hours AFTER air leaks resolve
What is a chest tube
allows you to meaure rate of bleeding (fluid), improves ventilation, allow for lung re-expansion
When is ETCO2 measured
at the end of exhalation
Indications for ETCO2 measurment
evaluate V/Q ratio, determine position of ETT, monior integrity of artificial airway
What is the normal difference in PaCO2 and ETCO2
usually 3-5
A sudden drop in O2 means
the vent disconnecred or the adapter is clogged with secreations
What is PvO2
oxygen usage through the body
What is SvO2
percent of oxygen that is in blood when it returns to the right atrium
What are the risks associated with injuries to C3 and C%
Diaphragmatic Paralysis
Normal MAP
70-100
Normal PVO2
30-40
Normal SV02
65-75
If ETCO2 is increasing, what happens to PaCO2
it increases
Indications for chest tube
pneumothorax, hemothorax, pleural effusion
Goals of a chest tube
to drain air or fluid
what is the collection chamber
collects fluid from the patient. subdivided into columns to assess the amount drained. color anf consistency
what is the water seal chamber
one way valve allowing air to escape and no re-enter pleural space. filled to 2cm of fluid. Water rise during spontaneous exhalation and falls during inspiration (opposite when patient is on ventiltior)
What is the suction control chamber
regulater amount of vacuum applied to chest tube. filled to a depth of 20cm of fluid.
Indications for ETCO2
to identify proper placement of ETT, to assess effectiveness of compressions during CPR, to continuously monitor CO2, to trend CO2