What is the primary nursing responsibility when caring for a client who is experiencing an obstetric hemorrhage associated with uterine atony?
Correct Answer: B
Rationale: The correct answer is B: Performing fundal massage. Fundal massage helps to stimulate contractions of the uterus, which can help control bleeding in cases of uterine atony. This is a primary nursing responsibility to address the immediate cause of the hemorrhage. Establishing venous access (choice A) is important but not the primary responsibility in this situation. Preparing for surgical intervention (choice C) may be necessary if conservative measures fail, but it is not the initial step. Catheterizing the bladder (choice D) is not directly related to managing obstetric hemorrhage associated with uterine atony.