Electrosurgery in GI Endoscopy Post Test

The following questions will be Multiple Choice and True/False. Please choose the word or phrase that best completes the following statements.

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RN Number or Last 4 of SSN

The first use of an electrosurgical unit in a United States (US) operating room is credited to:

a. William Bovie

b. Harvey Cushing

c. Both a and b

d. Neither a nor b

The force that pushes current along its path is called:

a. Voltage

b. Resistance

c. Power Density

d. Wattage

Hertz is a measure of:

a. Waveform

b. Resistance

c. Frequency

d. Impedance

Isolated ESU generators were developed to eliminate the incidence of:

a. Neutral electrode burns

b. Alternate site burns

c. Fires

d. a and b only

The thermal effect of electrosurgery depends on:

a. ESU setting

b. Waveform chosen for the output energy

c. Impedance of the tissue

d. All of the above

Bipolar electrosurgery requires a:

a. Generator

b. Active electrode

c. Neutral electrode

d. a and b only

Safety concerns associated with neutral electrodes and implanted electronic devices are minimized with the use of:

a. APC

b. Waterjet-assisted procedures

c. Bipolar electrosurgery

d. Monopolar electrosurgery

Which of the following tissues is least resistant to current flow?

a. Scar tissue

b. Mesentery, brain

c. Bowel

d. Muscle

Which of the following best describes a low-voltage waveform with a 100% duty cycle?

a. Cut

b. Coag

c. Blend

d. Cut and Coag

10.

Where is the best placement for the neutral electrode?

a. Boney prominences, scars/tattoos, or hairy surfaces.

b. Large muscle mass farthest from the endoscopic/surgical site.

c. Large muscle mass closest to the endoscopic/surgical site.

d. All of the above.

11.

For gastrointestinal (GI) endoscopy, the best position for the neutral electrode is on the:

a. Lower leg

b. Flank, over the kidney on the latissimus dorsi muscle

c. Abdomen

d. Upper arm

12.

The most common complication associated with the use of electrosurgery is:

a. Neutral electrode burns

b. Alternate Site burns

c. Fires

d. Interference with implanted cardiac pacemakers

13.

When performing APC:

a. Tissue should be dry

b. A neutral electrode is not necessary

c. Avoid direct contact with the tissue

d. Apply direct contact with the tissue

14.

For safety reasons, active electrodes should not be used:

a. In the presence of flammable agents or vapors

b. When using an open oxygen system with un-tented drapes

c. Until alcohol-based prep agents have fully dried

d. All of the above

15.

The purpose of the neutral electrode is to:

a. Remove current from the patient and send it back to the generator

b. Send current into the patient

c. Remove current from the generator and send it into the patient

d. None of the above

16.

Which of the following is used to elevate the submucosa prior to endoscopic resection of a GI lesion?

a. Argon Plasma Coagulation

b. Submucosal injection therapy (SIT) and submucosal fluid injection (SFC)

c. Blended cut/coag waveform

d. All of the above

17.

Which of the following statements about ESUs is true?

a. Do not activate the instrument until it is in close proximity to the tissue

b. Choose the highest power setting to achieve the desired surgical effect

c. Place the active electrode on the patient drape when not in use

d. Cut the dispersive electrode to fit the patient size

18.

Which of the following safety precautions apply to APC?

a. Argon gas should be purged from the line and electrode after moderate delays between activations and between uses

b. The neutral electrode should not be placed in direct contact with tissue

c. Patients should be monitored for gas emboli, specifically end-tidal carbon dioxide, during the procedure

d. a & c only

19.

General electrosurgery precautions include:

a. Do not use active electrodes in the presence of flammable agents

b. Place the active electrode in the safety holster when not in use

c. Use the correct active electrode size for the patient

d. All of the above

20.

APC is useful for all of the following applications as reported in clinical literature except:

a. Coagulating vascular malformations such as telangiectasias, arterio-venous malformations, and GAVE syndrome

b. Controlling ingrowth and overgrowth of esophageal stents

c. Polypectomy and papillotomy

d. Pallative ablation of esophageal tumors

21.

Argon gas that forms a bleb in the mucosal tissue is called emphysema.

a. True

b. False

1 out of 21

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