Randon Questions Flashcards
What is the % mass, % of cardiac output and mL/min/100g that goes to the muscle group?
Muscle
50% Mass
20% CO
3 mL/min/100g
What is the % mass, % of cardiac output and mL/min/100g that goes to the vessel rich groups?
VRG
10% Mass
75% CO
75 mL/min/100g
What is the % mass, % of cardiac output and mL/min/100g that goes to the fat group?
Fat
20% Mass
6% CO
2 mL/min/100g
What is the formula for time constant?
time constant = flow/volume
What is normal cerebral blood flow?
50 mL/min/100g
What is the range for regional cerebral blood flow?
rCBF = 20-150 mL/min/100g
List 4 factors that allow for a fast induction.
low blood gas coefficient, low cardiac output, high ventilation, high inhaled concentration
Anything that increases sympathetic tone will require increased MAC. Give an example of something that increases sympathetic tone.
pain increases sympathetic tone
At what MAC does only 1% of ppl respond to surgical incision?
1.3 MAC - if you want to reasonably anesthetize a person, use 1.3 MAC
Why can you decrease the MAC of gas when using N2O with a volatile anesthetic?
N2O provides analgesia
Blood pressure depends on what 3 things?
Volume, Resistance, and Cardiac Output
Any volatile with the -CF2H group used with a dry absorber has the potential to produce what?
Carbon Monoxide
What is pulsus paradoxus?
In medicine, a pulsus paradoxus (PP), also paradoxic pulse or paradoxical pulse, is defined as an abnormally large decrease in systolic blood pressure and pulse wave amplitude during inspiration. The normal fall in pressure is less than 10 mmHg or 10 torr. When the drop is more than 10mm Hg, it is referred to as pulsus paradoxus.
Pulsus paradoxus has nothing to do with pulse rate or heart rate. The normal variation of blood pressure during breathing/respiration is a decline in blood pressure during inhalation and an increase during exhalation.
Pulsus paradoxus is a sign that is indicative of what conditions?
Pulsus paradoxus is a sign that is indicative of several conditions, including cardiac tamponade, pericarditis, chronic sleep apnea, croup, and obstructive lung disease (e.g. asthma, COPD).
