A nurse is preparing a sterile field for a client who requires a sterile procedure. Which of the following actions should the nurse plan to take?

Choice A reason: Bleeding time assesses platelet function, not warfarin’s anticoagulant effect. Warfarin inhibits vitamin K-dependent clotting factors, unrelated to platelets. Monitoring bleeding time does not reflect therapeutic anticoagulation levels, making it irrelevant for adjusting warfarin doses to prevent thrombosis or bleeding.
Choice B reason: Factor VIII, deficient in hemophilia A, is not affected by warfarin, which targets vitamin K-dependent factors (II, VII, IX, X). Measuring Factor VIII does not indicate warfarin’s efficacy, as it is unrelated to the drug’s mechanism, making it unsuitable for dose monitoring.
Choice C reason: aPTT monitors heparin’s effect on the intrinsic clotting pathway, not warfarin’s action on vitamin K-dependent factors. Warfarin requires INR for therapeutic monitoring, as aPTT is insensitive to its effects, making it inappropriate for assessing warfarin’s anticoagulation range in patients.
Choice D reason: INR standardizes prothrombin time, measuring warfarin’s effect on vitamin K-dependent clotting factors. It ensures therapeutic anticoagulation (e.g., INR 2-3), preventing thrombosis or bleeding. INR is the gold standard for warfarin monitoring, guiding dose adjustments for safe and effective therapy.

Choice A reason: Frequent swallowing is a key indicator of post-tonsillectomy hemorrhage, as the child may swallow blood from bleeding in the surgical site. This subtle sign requires urgent assessment to prevent airway obstruction or significant blood loss, aligning with clinical priorities, making it the correct finding.
Choice B reason: Increased drowsiness may indicate pain medication effects or general recovery but is not specific to hemorrhage. While concerning, it is less urgent than frequent swallowing, which directly suggests bleeding, making this finding less indicative of hemorrhage in this context.
Choice C reason: Elevated pain is expected post-tonsillectomy due to surgical trauma and does not specifically indicate hemorrhage. Pain may persist regardless of bleeding, so this finding is less reliable than frequent swallowing for identifying potential hemorrhage, making it incorrect.
Choice D reason: Diminished breath sounds suggest respiratory complications like atelectasis or obstruction, not hemorrhage. Bleeding would more likely present with swallowing or visible blood. This finding is unrelated to tonsillectomy hemorrhage, making it an incorrect indicator for this complication.