CRNFA Hemostasis and Tissue Management

Question 1

Which electrosurgical mode cuts tissue by delivering continuous current that rapidly heats intracellular water to cause cell vaporization?

Accepted Answer

Pure cut mode

Answer

Coagulation mode

Answer

Blend mode

Answer

Bipolar mode

Question 2

A ligating clip should be placed at what minimum distance from the planned transection point to ensure secure hemostasis?

Accepted Answer

2–3 mm

Answer

0.5 mm

Answer

1 mm

Answer

5 mm or more

Question 3

When using a harmonic scalpel (ultrasonic energy device), what is the primary mechanism of tissue sealing?

Accepted Answer

Mechanical vibration denaturing protein to form a coagulum

Answer

Electrical coagulation of proteins

Answer

Thermal conduction from the active blade only

Answer

Radiofrequency energy at 300 kHz

Question 4

Topical thrombin agents such as Thrombin-JMI work by activating which step in the coagulation cascade?

Accepted Answer

Converting fibrinogen directly to fibrin

Answer

Converting prothrombin to thrombin

Answer

Activating platelets via ADP pathway

Answer

Inhibiting fibrinolysis

Question 5

Bone wax is most appropriately used to control bleeding from which type of source?

Accepted Answer

Bleeding from cancellous bone surfaces (e.g., sternum or cranium)

Answer

Major arterial bleeding

Answer

Venous oozing from soft tissue

Answer

Capillary bleeding from skin edges

Question 6

Electrosurgical unit (ESU) current density is highest at which point in the circuit?

Accepted Answer

The active electrode tip

Answer

Dispersive (grounding) pad

Answer

The generator unit

Answer

Along the connecting cable