Exam 1: Hemodynamic Monitoring Flashcards
Four parameters that are continually evaluated during anesthesia:
Oxygenation
Ventilation
Circulation
Temperature
Two exceptions to constant-presence requirement:
Laboring moms
Pain mgmt
Minimal standard monitors (6):
BEPPOE: BP EKG Precordial stethoscope Pulse ox Oxygen analyzer ETCO2
Minimal information on monitor display:
BEVOH: BP EKG Ventilation status (ETCO2) O2 Saturation HR
Means of hemodynamic monitoring (6):
Stethoscope EKG BP (invasive and non) CVP PAP/PCWP TEE
Esophageal stethoscope distance of insertion:
28-30cm
Advantage of esophageal/precordial stethoscope:
Very sensitive monitor for bronchospasm/changes in pediatric patients
Purposes of EKG monitoring (5):
Detect arrythmias Monitor HR Detect ischemia Detect electrolyte changes Monitor pacemaker
Best EKG lead for rhythm detection:
II
Best EKG lead for ischemia detection:
V
3-lead leads:
I, II, III
5-lead leads:
I, II, III, aVR, aVL, aVF, V
Significant coronary artery not viewed in a 3-lead:
LAD
Reasons for EKG artifact:
Cautery/electrical equip Movement Hair Sweat Shivering
Gain standard: ____ signal produces _____ calibration pulse so that a _____ ST segment change can be accurately assessed
1mV; 10mm; 1mm
Two EKG filtering modes:
Monitor
Diagnostic
Filtering should be set to this mode:
Diagnostic
Five principle indicators of acute ischemia:
ST segment elevation or depression
T wave inversion or peaking
Q wave development
Leads to detect posterior/inferior wall ischemia (RCA):
II
III
AVF
Leads to detect lateral wall ischemia (circumflex):
I
AVL
V5-V6
Leads to detect anterior wall ischemia (LCA):
I
AVL
V1-V4
Leads to detect anterioseptal ischemia (LAD):
V1-V4
Changes in SBP correlate with:
Changes in myocardial O2 requirements
Changes in DBP correlate with:
Coronary perfusion pressure
MAP calculation:
SBP+2(DBP)/3
As pulse moves distally, it’s distorted this way:
Exaggerated SBP/wider pulse pressure
Rate of a-line upstroke correlates with:
Contractility
Rate of a-line downstroke correlates with:
SVR
Exaggerated change in a-line waveform with respiration indicates:
Hypovolemia
Area under the a-line curve equals:
MAP
Biggest a-line risk:
Hemorrhage/hematoma
Best site for CVC and why:
RIJ - straight shot to heart, best success rate
Better side for subclavian:
R
Lowest infection rate CVC site:
Subclavian
Highest infection rate CVC site:
Femoral
CVC placement confirmation in OR setting:
Aspiration of blood from all 3 ports
Contraindications to CVC:
R atrial tumor
Infection at site
Contralateral pneumothorax
The one non-technique based CVC risk:
Dysrhythmias
Normal mean RA/CVP pressure during spontaneous respiration:
1-7mmHg
Normal mean RA/CVP pressure during mechanical ventilation:
4-12mmHg
CVP “a” wave caused by:
Atrial contraction
CVP “c” wave caused by:
R ventricular contraction and bulging of tricuspid back into R atrium
CVP “x” descent caused by:
Ventricular contraction and relaxation of atrium
CVP “v” wave caused by:
Filling of atrium with blood from vena cava
CVP “y” descent caused by:
Tricuspid valve opening and ventricular filling
Dimensions of PAP catheter:
7-9 Fr
110 cm
Dimensions of CVC catheter:
7 Fr
20 cm
Only patients with demonstrated benefits to PAP monitoring:
Shock/sepsis pts
Biggest complications of PAP monitoring:
Arrythmias
PA rupture
Pressures in RA:
1-7 mmHg
Pressures in RV:
0-25mmHg
Pressures in PA:
10-25mmHg
Pressures in PAW:
8-12mmHg
Distance from RIJ to RA:
15-25cm
Distance from RIJ to RV:
25-35cm
Distance from RIJ to PA:
35-45cm
Distance from RIJ to PAW:
40-50cm
PAWP “a” wave represents:
Contraction of LA
Tallest wave
PAWP “c” wave represents:
Rapid rise in LV pressure during early systole that causes mitral valve to bulge backwards
(Shortest wave)
PAWP “v” wave represents:
Blood entering LA during late systole
Prominent PAWP “v” wave reflects:
Mitral valve insufficiency
Cardiac parameters observed via TEE (7):
Ventricular wall motion Valve structure/function EF estimation CO Flow characteristics Intracardiac air Intracardiac masses
Indications for TEE:
Unusual and unknown causes of acute hypotension
Major complication of TEE:
Esophageal trauma