Section 3: General Principles of Anesthesia Flashcards
Define “MET:’
A MET is a Metabolic EquivalenT and is defined as the amount of oxygen
consumed while sitting at rest
MET are used to
evaluate functional capacity
and reserve.
1 MET equal
equal to 3.5 mL 02/kg/min
Metabolic equivalents (METs) range from
1 to I2 (in whole numbers).
MET for eating, working at a computer, or dressing.
One metabolic equivalent ( 1 MET) correlates
METs: walking down stairs, walking in your house, or cooking.
2 METS
MET for walking one or two blocks on level ground.
3 METs correlates
MET: Raking leaves or gardening is equivalent to
4 METs.
METs for climbing one flight of stairs, bicycling or dancing. Six metabolic equivalents ( 6 METs) is .
Five metabolic equivalents (5 METs}
METS playing golf or carrying golf clubs
6 METs
Playing singles tennis.
7 METs correlates to
Rapidly climbing stairs or slowly jogging is equivalent to
8 METS
Correlates with jumping rope slowly or
moderate cycling.
Nine metabolic equivalents (9 METs
Swimming quickly, running or jogging briskly.
10 METs
Cross country skiing or playing full court basketball.
11 METs
Running rapidly for moderate to long distances is equivalent to
12 METs
Define the physical status index "ASA PS class 6."
Declared brain-dead patient whose organs are being removed for donor purposes is defined as ASA PS class 6
How much dextrose is in a 1-liter bag of
DSW? What is the dextrose concentration
{mg/mL)?
A one-liter (I L) bag of DSW contains 50 grams of dextrose, a concentration
of 50 mg/ml
In addition to sodium {140 mEq/L) and
potassium (5 mEq/L), what three electrolytes does Normosol-R contain?
In addition to physiologic concentrations of sodium and potassium, Normosol-R contains magnesium (3 mEq/L), acetate (27 mEq/L) andgluconate (23 mEq/L).
List 4 reasons why dextrans are of limited
use nowadays.
Dextran toxicities include:
(I) Antithrombotic effects, particularly inhibition of platelet aggregation;
(2) interference with blood cross-matching-dextrans coat RBC membranes;
(3) anaphylactic and anaphylactoid reactions; and
(4) renal dysfunction resulting from osmotic nephrosis.
Dextrans are relatively ___but what limits their use?
inexpensive (dextrans are produced by bacteria), but their range of toxicities limits their use.
Which blood components are found in
packed red blood cells (PRBC)?
Packed red blood cells (PRBC) contains red blood cells in anticoagulated
plasma.
In PRBCs, Most plasma is removed
(by centrifugation) and is replaced by pre·
servative, most commonly citrate phosphate dextrose adenine-I (CPDA-1).
The addition of adenine to packed red blood cells (PRBC) stored in CPD
extends the storage time from 21 days to ____days.
The addition of adenine to citrate phosphate dextrose (CPD) solution
allows RBCs to resynthesize adenosine triphosphate (ATP}, which extends
the storage time from 21 to 35 days.