hemodynamic monitoring seminar Flashcards
(29 cards)
what is hemodynamics
forces that enable the heart to circulate blood through the cardiovascular system
what is cardiac output
the amount blood your heart pumps out to your body per minute
what is stroke volume
the amount of blood ejected from the ventricle with each cardiac cycle (L/beat)
what is cardiac index
a measure that represents the hearts pumping ability relative to a person’s body size
what is preload
the amount of stretching that occurs in the hearts ventricles when they fill with blood before they contract
what is afterload
the amount of pressure the heart must exert to pumo blood out of the heart during ventricular contraction
what is contractility
the hearts ability to contract and pump blood out of the heart
types of hemodynamic monitoring systems
-CVP (central venous pressure)
-PAP (pulmonary artery pressure)
-PAWP(pulmonary artery wedge pressure)
what do hemodynamic monitoring systems include
-pressure transducer
-pressure tubing
-monitoring
-pressure bag and flush device
what is hemodynamic monitoring used to evalute?
-volume status (hyper/hypovolemia)
-cardiac function(SV and ejection fraction)
-integrity of the vascular system(shows immediate changes)
-physiologic response to therapies(meds)
what are arterial lines used for
-continuous information about changes in blood pressure
-sampling of arterial blood
insertion sites for arterial lines
-radial (most common)
-brachial
-femoral
can you administer fluids via arterial line
NO
what is mean arterial pressure
-the average pressure created during the cardiac cycle
-SBP + 2(DBP)/3
how to identify good capnography?
-bumps will align with rests between beats in the cardiac monitoring
-may need to zero line or reposition is waveform is off
what is a central venous catheter
inserted into a large vein to measure central venous pressure and draw mixed venous gases
-CAN BE USED FOR MED ADMIN
where is central venous catheter placed
internal jugular
subclavian
femoral
CVP capnography
-smaller peaks than art line d/t less pressure
-bumps align with beats on cardiac monitor
what is a pulmonary artery catheter
-inserted into a large vein then threaded through the right atria and ventricle into a branch of a pulmonary artery
what vein is a pulmonary artery catheter threaded through?
internal jugular
subclavian
what are pulmonary artery catheters used for?
-hemodynamic measurements
-blood sampling
-infusion of IV fluids
risk factors of a pulmonary artery catheter
-pneumothorax
-bleeding
-infection
-dissection
indications for a pulmonary artery catheter
-critical illness (cant get a pressure any other way)
-post CABG surgery
-heart failure
-trauma/injury i.e.burns d/t inc need for fluids & no skin for art lines
pulmonary artery catheter components
-syringe
-introducer with side port
-locking device
-markings
-connections to monitor
-catheter
-lumens (blue, white, yellow, red)
-thermistor
-balloon
