A nurse is caring for a client with a suspected upper gastrointestinal bleed. Which diagnostic test should the nurse anticipate to confirm the presence of blood in the stomach and differentiate the source of bleeding?

A) Incorrect. Swelling and bruising around the wound are common signs of external bleeding and do not directly indicate internal bleeding.

B) Correct. Cool and pale skin in the extremities may be indicative of vasoconstriction and reduced blood flow, which can occur in response to internal bleeding.

C) Incorrect. Blood oozing from the wound site is a typical sign of external bleeding and does not necessarily indicate internal bleeding.

D) Incorrect. Visible blood clot formation at the wound site is a normal part of the body's hemostatic response to control external bleeding and does not directly suggest internal bleeding.

A) Incorrect. While the respiratory rate is an important vital sign to monitor, it does not directly indicate the effectiveness of a blood transfusion.

B) Incorrect. Blood pressure is a critical vital sign, but it is not specific to assessing the effectiveness of a blood transfusion.

C) Incorrect. Urinary output is essential for assessing kidney function and fluid balance, but it does not directly reflect the impact of a blood transfusion.

D) Correct. Monitoring the hemoglobin level is crucial to determine if the blood transfusion has been effective in increasing the client's red blood cell count and improving oxygen-carrying capacity.