NEW
Font size
WorksheetsAblation Techniques Quiz
Total questions: 15
Worksheet time: 15mins
According to the document, which of the following is a key advantage of the percutaneous ablation approach?
It requires open surgical access.
General anesthesia is always necessary.
The patient can typically go home the same day.
It allows for direct visualization of the procedure.
The 'heat-sink' effect, as described in the document, is a phenomenon that leads to incomplete ablation. What is its primary cause?
Excessive tissue charring and gas formation.
The inability to use cooling techniques.
A break in the electrical circuit during the procedure.
Blood flow in large vessels carrying away thermal energy.
What is the primary mechanism of cell death during Cryoablation?
Heating of the tissue with radiofrequency energy.
Rapid cooling leading to ice formation and hypoxia from clotting.
The injection of absolute ethanol directly into the tumor.
The use of microwaves to burn the tumor from within.
Which of the following is listed as a contraindication for Radiofrequency Ablation (RFA) in the document?
Varicose veins.
Small lesions.
Chronic low back pain.
Lesions located close to a large vessel.
What is the key advantage of the Bipolar technique for RFA, as described in the document?
It requires the use of multiple probes simultaneously.
The current flows between the electrode and grounding pads.
It eliminates the need for grounding pads on the patient's skin.
It is best for treating medium to large lesions.
Which type of ablation probe is described as having multiple deployable electrodes that look like an umbrella or prongs?
LEEVEN probe.
COOL-TIP probe.
RITA probe.
Bipolar probe.
What is the primary function of the dispersive electrodes (ground pads) in a monopolar RFA setup?
To heat the surrounding tissue and destroy cancer cells.
To secure the patient to the operating table.
To prevent nerve or cardiac muscle damage.
To complete the electrical circuit and provide a return path for the RF energy.
According to the pathophysiology of tissue damage, what happens when tissue temperature exceeds 105∘C?
The patient experiences a slight fever for a few days.
The tissue undergoes rapid necrosis and cell death.
The probe automatically stops energy delivery due to tissue impedance.
Cells boil, releasing gas vapor and causing tissue charring.
What distinguishes the Microwave Ablation (MWA) technique from Radiofrequency Ablation (RFA), based on the provided text?
MWA uses lower frequencies than RFA.
MWA heats the tumor more slowly than RFA.
MWA delivers energy via a small antenna, creating an elliptical ablation zone.
MWA requires a grounding pad to complete the circuit.
Which of the following is listed as an advantage of RFA compared to surgery in the provided document?
It results in a longer recovery period for the patient.
It can be performed only with open surgical access.
It removes less normal tissue than surgery.
It has a higher risk of complications than surgery.
Percutaneous Ethanol Ablation (PEI) is described as using what substance to kill cancer cells?
Radiofrequency energy.
Microwaves.
Absolute ethanol.
Liquid argon gas.
According to the document, what is the critical temperature range for cell death during Cryoablation?
>−50∘C
50∘C to 100∘C
−19∘C to −40∘C
−10∘C to −15∘C
What is the frequency range of the alternating current used in Radiofrequency Ablation?
900-2450 MHz.
460-500 kHz.
10-900 MHz.
Less than 900 kHz.
Why is a precise control over temperature, power, and time required during RFA?
To ensure the patient can be discharged the same day.
To prevent excessive charring and gas formation that can break the electrical circuit.
To reduce the risk of a slight fever after the procedure.
To activate the 'roll-off phenomenon'.
According to the document, which of the following is a possible complication of RFA?
Anesthesia is not required.
Lack of discomfort or pain during the procedure.
Laparoscopic access is not possible.
Vascular injury.
