Miscellaneous monitors & equipment Flashcards
What is the BEST method of assessing a deep neuromuscular block?
a. sustained tetany
b. post-tetanic count
c. double burst stimulation
d. train-of-four
b. post-tetanic count
TOF delivers a series of
4 twitches at 2 Hz at 0.5 second intervals for 2 seconds
With TOF, the height
of the 4th twitch is compared to the height of the 1st twitch
Clinical recovery from neuromuscular blockade is achieved when the TOF ratio is
> 0.9 & a reversal agent is indicated when the TOF ratio <0.9
Tetanus delivers a
high frequency of stimulation
A common approach of tetany includes
a rapid sequence of 50 Hz stimuli for 5 seconds
Double burst stimulation delivers
2 short bursts of 50 Hz tetanus 0.75 seconds apart
_________ is easier to detect with DBS than it is with TOF
Fade
Post-tetanic potentiation occurs when the twitch response is
stronger after a tetanic stimulus than it was at baseline
To perform a post-tetanic count, a
50 Hz tetanic stimulus is delivered for 5 seconds followed by a series of single twitches
The best method of assessing deep neuromuscular blockade is
PTC
What percent of Nm receptors must be blocked to lose T1 (no twitches)?
90%
Fade occurs when the T4/T1 ratio is less than:
1.
Select the statement that BEST describes cerebral oximetry.
a. it is invasive
b. a >25% change from baseline suggests a reduction in cerebral oxygenation
c. it monitors arterial oxygen saturation in cerebral blood
d. it monitors global cerebral oxygenation
b. a >25% change from baseline suggests a reduction in cerebral oxygenation
Cerebral oximetry utilizes ________ to measure cerebral oxygenation
near-infrared spectroscopy (NIRS)
