Certified Polysomnographic Technician (CPSGT) Practice Exam

When it comes to cleaning electrodes and leads used in polysomnography, the preferred choice is isopropyl alcohol. This substance effectively removes oils, dirt, and other contaminants from the skin and the surfaces of electrodes, which is essential for maintaining optimal signal quality during sleep studies.

Isopropyl alcohol has excellent antiseptic properties, which help reduce the likelihood of infection while also preventing interference with the electrical signals that the electrodes need to pick up. Its quick evaporation also prevents moisture from lingering, which could affect the integrity of the recordings.

While other cleaning agents might be effective at removing dirt or contamination, they could pose risks. For instance, bleach can corrode metal contacts and is not safe for skin contact. Soap and water, while cleaning, may leave residues that can interfere with the function of electrodes. Hydrogen peroxide, while an antiseptic, may not be as effective as isopropyl alcohol for this specific application due to its slower evaporation rate and potential for leaving moisture or residue behind.

Therefore, isopropyl alcohol stands out as the most suitable and effective cleaning agent for ensuring both cleanliness and functionality of electrodes and leads.