CRNI Parenteral Nutrition Administration 4

Question 1

A patient receiving PN develops sudden onset chest pain, hypotension, and cyanosis shortly after the infusion begins. The nurse should first suspect:

Accepted Answer

Air embolism

Answer

Air embolism is a life-threatening complication of PN that presents with sudden chest pain, hypotension, and cyanosis, requiring immediate intervention including placing the patient in left lateral Trendelenburg position.

Question 2

Which electrolyte abnormality is MOST associated with refeeding syndrome in a severely malnourished patient starting PN?

Accepted Answer

Hypophosphatemia

Answer

Hypophosphatemia is the hallmark of refeeding syndrome, occurring as insulin shifts phosphate intracellularly when carbohydrate metabolism resumes after prolonged starvation.

Question 3

When using a 1.2-micron in-line filter for PN administration, the nurse understands this filter is appropriate for:

Accepted Answer

Total nutrient admixtures (3-in-1)

Answer

A 1.2-micron filter is used for total nutrient admixtures (3-in-1) because it allows lipid particles to pass through while filtering particulates and some microorganisms.

Question 4

A CRNI is calculating the osmolarity of a peripheral PN solution. Which finding would indicate it is safe for peripheral administration?

Accepted Answer

900 mOsm/L

Answer

Peripheral PN should not exceed 900 mOsm/L to minimize the risk of phlebitis and vein damage.

Question 5

Which action is correct when a PN bag must be changed before it is completely infused?

Accepted Answer

Discard the remaining solution and hang the new bag

Answer

Partially infused PN bags should be discarded because PN is an ideal growth medium for microorganisms and must not be stored after being spiked.

CRNI Exam Practice Test

CRNI Exam Practice Test

CRNI Parenteral Nutrition Administration 4