A nurse is teaching a newly licensed nurse about reducing the risk of needlestick injuries. Which of the following instructions should the nurse include?

A. This response addresses the timeframe for heparin to achieve therapeutic levels in the bloodstream, not its action on dissolving clots. Heparin works primarily by inhibiting the formation of new clots and preventing existing clots from enlarging or propagating, rather than directly dissolving existing clots.
B. This statement accurately describes the mechanism of action of heparin. Heparin is an anticoagulant that works by enhancing the activity of antithrombin III, which inhibits the clotting factors thrombin and factor Xa. This action prevents the formation of new clots and stabilizes existing clots, but it does not actively dissolve them.
C. While pharmacists are knowledgeable about medications, including their mechanisms of action, it is within the scope of nursing practice to provide information on how medications work to clients. The nurse should be prepared to explain the basic mechanism of heparin's action to the client in understandable terms.
D. This response is inaccurate regarding heparin's action. Heparin itself does not directly dissolve clots; it prevents further clot formation and allows the body's natural fibrinolytic (clot-dissolving) mechanisms to work on existing clots. Oral medications like warfarin or direct oral anticoagulants (DOACs) may be used after initial heparin therapy to continue anticoagulation, but they do not directly dissolve clots either.

A. Notifying the laboratory is not the first action to take in this situation. While it's important to inform the laboratory about suspected transfusion reactions for further investigation and documentation, immediate patient care takes precedence to ensure the client's safety.

B. This is the correct action to take first. Stopping the infusion of blood is crucial to prevent further administration of the potentially harmful blood product. Suspecting an acute hemolytic reaction (symptoms like chills, back pain, and hypotension) necessitates immediate cessation of the transfusion to minimize complications.
C. Obtaining a urine specimen may be indicated later to assess for hemolysis and kidney function, but it is not the first action to take. The priority is to stop the transfusion and assess the client's condition to manage the suspected transfusion reaction.
D. While it's important to notify the provider promptly, stopping the transfusion (option B) is the first critical action to take in response to suspected acute transfusion reactions. The provider will need to be informed for further orders and management, but immediate cessation of the transfusion is essential to prevent worsening of the client's condition.