Test Your Knowledge About Electrodes! Trivia Quiz
(17).jpg "Test Your Knowledge About Electrodes! Trivia Quiz - Quiz")
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- 1.The type of electrode most commonly used in an intensive care unit or operating room setting is ______.
- A.
Epidural electrode
- B.
Percutaneous electrode
- C.
Sub-dermal electrode
- D.
Kirsher electrode
- 2.It is most important that electrode impedances are balanced. Ideally, sub-dermal electrode impedances would be between what range?
- A.
5k-7k ohms
- B.
8k-11k ohms
- C.
5-7 ohms
- D.
12k-20k ohms
- 3.All of the following statements regarding sub-dermal electrodes are true except which one?
- A.
Convenient, faster set-up.
- B.
You or staff could get stuck.
- C.
Higher current density than other types of electrodes.
- D.
Require a conduction medium such as 10-20 paste.
- 4.Why must the skin/scalp be prepped before applying surface electrodes?
- A.
Quicker electrode application.
- B.
Reduce the amount of conduction medium required for sufficient contact.
- C.
Remove dead skin cells, oil, hair styling product residue.
- D.
Allow for greater patient comfort during electrode application.
- 5.What conduction medium is not permitted for use in the operating room?
- A.
10-20 paste
- B.
Elifix
- C.
Collodion
- D.
NuPrep
- 6.Epidural electrodes are made of platinum for what reason?
- A.
Minimize movement of the electrode.
- B.
Avoid neurotoxicity.
- C.
Low current density.
- D.
Decreased incidence of infection.
- 7.All of the following are true about epidural electrodes except _______.
- A.
Can be used as a recording electrode only.
- B.
Placed intraoperatively when surgeon creates a laminotomy.
- C.
Generally has 3 contacts allowing for recording directly from the spinal cord.
- D.
Used to record neurogenic motor evoked potentials.
- 8.When performing cortical grid mapping, looking for phase reversal, what does the absence of phase reversal indicate?
- A.
Suggests less than optimal impedance on the cortical grid.
- B.
Identifies close proximity of the pre-central gyrus.
- C.
Suggests that the recording contacts are not over the centraol sulcus or obstructed from a large tumor.
- D.
Suggests that the contralateral median stimulus intensity is insufficient.
- 9.Mixing electrodes made of various electrode metals is discouraged for all of the following reasons except ______.
- A.
Introduces the possibility of microcurrent leading to interference.
- B.
Creates possibility of unnecessary challenges during critical point of the case (ex. clipping an aneurysm)
- C.
Introduction of artifact.
- D.
Creates a lower averaged current density.
- 10.Which landmark of the International 10-20 System of Electrode Placement is sometimes challenging to locate due to anatomic variation in prominence?
- A.
Inion
- B.
Nasion
- C.
Vertex
- D.
Pre-auricular notch
- 11.When measuring a patient's head in accordance with the 10-20 International System of Electrode Placement, the measurements are taken in what unit of measurement?
- A.
Inches
- B.
Mm
- C.
Cm
- D.
Kg
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