Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Monitoring > Miscellaneous Monitors > Flashcards

Miscellaneous Monitors Flashcards

1
Q

What Hz and time interval is TOF at?

A

4 twitches at 2hz and 0.5 second intervals for 2 seconds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

When <50% of receptors are blocked, what will be seen on the TOF?

A

Normal TOF, 4 equal twitches.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

When <75% of receptors are blocked, what will be seen on the TOF?

A

100% T1
75% T4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

When are T4 twitches lost?

A

When 80% of receptors are blocked

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

When are T1 twitches lost?

A

> 90% of twitches blocked

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

When are T2 and T3 twitches lost?

A

When 20 and 10 % of twitchers are occupied

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is tetanus? How long? How many Hz?

A

Continuous for 5 seconds at 50Hz

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Is tetany more or less sensitive than TOF?

A

more sensitive at assessing recovery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How does tetany affect TOF?

A

Wont be accurate for up to 6 minutes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Is it easier to detect fade with DBS or TOF?

A

DBS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is DBS? How long? How many Hz?

A

2 short bursts of 50 Hz, 0.75 seconds apart

**very painful

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the best method of assessing a deep neuromuscular blockade ?

A

Post tetanic count

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What will be seen after 6-10 post tetanic twitches?

A

T1 will return shortly

*fewer twitches means return of T1 is further away

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Fade occurs when the T4/T1 ratio less than: ?

A

1.0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the advantage of a double-burst stimulation?

A

Easier to detect fade

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is post-tetanic potentiation? When is it most helpful?

A

Occurs when the twitch response is stronger after a tetanic stimulus than it was at baseline

When no twitches are seen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What does cerebral oximetry monitor?

A

Venous oxygen saturation

16
Q

Does cerebral oximetry monitor global or regional oxygenation?

A

Regional

17
Q

What is the ration of cerebral blood volume?

A

1 part arterial
3 part venous

18
Q

Can cerebral O2 monitor pulsatile blood flow?

A

No

19
Q

What percentage of a change signals a reduction in cerebral O2?

A

> 25%

20
Q

What can interfere with cerebral O2?

A

Scalp hypoxia can interfere and may falsely suggest brain ischemia

21
Q

How many light sensors in cerebral O2?

A

2

22
Q

What is the order from highest frequency to lowest frequency of EEG?

A

Highest
1. Beta
2. Alpha
3. Theta
4. Delta
Lowest

23
Q

Which brain waves have high frequency and low voltage? Associated with awake mental stimulation and light anesthesia?

A

Beta

24
Q

Which brain waves have the second high frequency? Associated with awake but restful sleep?

A

Alpha

25
Q

Which brain waves have the third highest frequency? Associated with general anesthesia and children during normal sleep

A

Theta

26
Q

Which brain waves are associated with general anesthesia, deep sleep, and brain injury?

A

Burst suppression

27
Q

What happens to beta waves on induction of general anesthesia?

A

They increase

**also increases with light anesthesia

28
Q

What two brain waves are associated with general anesthesia ?

A

Theta and Delta

29
Q

What MAC provides complete suppression?

A

1.5-2.0 MAC

30
Q

How does nitrous affect beta wave activity?

A

Increases it

31
Q

How does sevo affect EEG activity?

A

Can increase epileptiform

32
Q

How does etomidate affect EEG?

A

Can cause myoclonus but is not epileptiform

33
Q

How does ketamine affect EEG?

A

May increase high frequency cortical activity and the patient may be deeper than suggested

34
Q

What may hypothermia cause?

A

Burst suppression - especially during cardiopulmonary bypass

35
Q

What does unilateral burst suppression suggest ?

A

Cerebral ischemia

36
Q

What may new delta waves signal during anesthetic maintenance?

A

Brain is at risk for ischemia

37
Q

What may mimic cerebral ischemia?

A

deep aesthesia, hypothermia, hypocarbia

38
Q

When is EEG useful?

A

Carotid’s
Cerebral aneurysm
AV malformation
CPB
Deliberate hypotension
Barbiturate coma
Epilepsy
Coma and death

Monitoring (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions