The nurse is educating a patient about the use of a cane due to weakness of the left leg.
Which statement by the patient would indicate teaching has been effective?

Choice A rationale:

The nurse mistakenly calling the patient's daughter "your wife" is a communication error but does not qualify as a sentinel event. Sentinel events are serious, largely preventable patient safety incidents that result in significant harm or death to the patient. Miscommunication, while important to address, does not fall under the category of a sentinel event.

Choice B rationale:

A surgical procedure performed on the wrong leg of a patient is a classic example of a sentinel event. Wrong-site surgery is a serious medical error that can lead to severe consequences for the patient. Proper protocols and procedures, such as time-outs and site marking, are in place to prevent such incidents, making this a sentinel event that requires immediate investigation and analysis to prevent recurrence.

Choice C rationale:

The surgical procedure being postponed by 30 minutes, while potentially inconvenient, does not constitute a sentinel event. Delays in surgical schedules are not uncommon due to various reasons such as emergencies or the complexity of preceding procedures. While delays should be minimized, they do not necessarily result in patient harm or death, making them different from sentinel events.

Choice D rationale:

The nurse failing to raise the bed to a working height during patient care is a safety concern but does not qualify as a sentinel event. It is important for nurses to adhere to proper body mechanics and safety protocols to prevent accidents and injuries. While this situation requires correction and education, it does not meet the criteria of a sentinel event.

Choice A rationale:

During inhalation, carbon dioxide levels are lower in the alveoli due to the exchange of gases. The higher concentration of carbon dioxide is found in the blood, which diffuses into the alveoli for elimination during exhalation.

Choice B rationale:

Alveoli do not collapse during the inhalation cycle. Surfactant, a substance produced by type II alveolar cells, reduces surface tension and prevents alveoli from collapsing, ensuring efficient gas exchange.

Choice C rationale:

Oxygen moves from the alveoli to the capillaries, while carbon dioxide moves from the capillaries to the alveoli. This exchange of gases occurs due to differences in partial pressures, facilitating the uptake of oxygen by red blood cells and the removal of carbon dioxide from the body.

Choice D rationale:

Exhaling carbon dioxide is a passive process that does not require significant effort. The respiratory muscles relax during exhalation, allowing the lungs to passively expel carbon dioxide from the body as a waste product of metabolism.