What organ is contained in the cranial cavity?

Choice A rationale:

Diastolic pressure represents the pressure in the arteries when the heart is at rest between contractions. It specifically measures the force of blood against the arterial walls when both the atria and ventricles are relaxed, allowing the heart to fill with blood. Diastolic pressure is the bottom number in a blood pressure reading (e.g., 120/80 mmHg), indicating the pressure in the arteries during the heart's resting phase. Elevated diastolic pressure is an important indicator of increased risk for cardiovascular diseases, such as hypertension.

Choice B rationale:

This statement describes systolic blood pressure, which measures the pressure in the arteries when the heart's ventricles contract and pump blood into the circulation. Systolic pressure is the top number in a blood pressure reading (e.g., 120/80 mmHg) and represents the highest pressure reached in the arteries during a cardiac cycle.

Choice C rationale:

This description is not accurate for either diastolic or systolic pressure. Both atria and ventricles do not contract simultaneously; they follow a specific sequence to ensure effective pumping of blood through the heart.

Choice D rationale:

This statement is incorrect as it does not align with the definitions of diastolic or systolic blood pressure. Diastolic pressure specifically measures the pressure in the arteries during the heart's resting phase, not when the ventricles relax. .

Choice D rationale:

When preparing to open a sterile pack, the nurse must touch only the inner surface of the inner wrapper to maintain sterility. This is a fundamental principle of aseptic technique. Sterile items should be handled with care to prevent contamination. By touching only the inner surface of the inner wrapper, the nurse ensures that the contents of the pack remain sterile and safe for use in medical procedures. Any contact with the outer surface or other non-sterile items can compromise the sterility of the contents.

Choice A rationale:

Placing the sterile pack on a clean surface is a good practice but does not ensure the maintenance of sterility. Sterile items should be placed on a sterile surface or field to prevent contamination. Placing the pack on a clean surface may still expose it to potential contaminants, compromising its sterility.

Choice B rationale:

Turning the pack so that the first flap faces the nurse's body is incorrect. The first flap should be opened away from the nurse to avoid the risk of contamination. By opening the flap away from the nurse, any potential contaminants in the air are less likely to come into contact with the sterile contents.

Choice C rationale:

Opening the right-side flap first is not a standard practice for opening a sterile pack. The choice of which side to open first may vary based on individual preference or the design of the packaging. The key factor is to maintain the sterility of the contents by handling the pack appropriately, as mentioned in choice D.