Final answer:
The indicator of a successful therapeutic response to a blood transfusion is an increase in hemoglobin levels, hence the correct answer is c. Hgb 14 g/dL.
Step-by-step explanation:
The question is asking for the indicator of a therapeutic response after a client has received a blood transfusion following a total hip arthroplasty. A therapeutic response after the transfusion of packed RBCs (red blood cells) is primarily indicated by an increase in the client's hemoglobin (Hgb) levels. Therefore, the correct answer is c. Hgb 14 g/dL, which shows the blood transfusion was effective in increasing the oxygen-carrying capacity of the blood. Hemoglobin levels are a direct measure of the number of red blood cells in the blood. An increase in hemoglobin post-transfusion indicates an increase in RBCs, thereby improving the patient's oxygenation status.