A nurse is caring for a client who has a pulmonary embolism and is receiving therapy with unfractionated heparin. Which of the following laboratory results indicates that the therapy is effective?
PT 12 seconds.
aPTT 75 seconds.
INR 1.1.
Platelets 200,000/mm².
The Correct Answer is B
Choice A rationale:
A PT (Prothrombin Time) of 12 seconds is not indicative of the effectiveness of heparin therapy for a pulmonary embolism. PT measures the extrinsic pathway of the coagulation cascade, and it is more relevant to monitor in patients on warfarin therapy.
Choice B rationale:
The aPTT (Activated Partial Thromboplastin Time) of 75 seconds is the correct choice as it reflects the effectiveness of unfractionated heparin therapy. Heparin works by inhibiting clotting factors in the intrinsic pathway, and the aPTT is used to monitor heparin's anticoagulant effect. The normal range for aPTT is typically 25-35 seconds.
Choice C rationale:
An INR (International Normalized Ratio) of 1.1 is not the appropriate parameter to assess the effectiveness of heparin therapy. INR is primarily used to monitor the effectiveness of oral anticoagulants like warfarin, not heparin.
Choice D rationale:
The platelet count of 200,000/mm² is not a suitable parameter to evaluate the effectiveness of heparin therapy. Platelet count is important for assessing the risk of bleeding or clotting disorders but does not directly measure the impact of heparin on clotting factors.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale:
Completely irrigating one eye before irrigating the second eye is the correct action to take when a client receives a chemical splash on their face. This approach helps prevent the potential spread of the chemical from one eye to the other. Irrigation should be done immediately to flush out the chemical and minimize its harmful effects.
Choice B rationale:
Informing the client to blink their eyes rapidly during the irrigation process is not recommended. Blinking may exacerbate the dispersion of the chemical and could lead to further damage to the eyes. Instead, the client should keep their eyes open during irrigation.
Choice C rationale:
Delaying the irrigation process until the type of chemical in the eyes is identified is not appropriate. Time is critical in minimizing the impact of the chemical on the eyes. Immediate irrigation is essential, regardless of the type of chemical, to remove the substance from the eyes.
Choice D rationale:
Asking the client to count the number of fingers held up by the nurse before irrigating their eyes is not relevant in this situation. The priority is to initiate immediate irrigation to remove the chemical from the eyes. Assessing the client's visual acuity can be done later in the evaluation process after the eyes have been irrigated.
Correct Answer is C
Explanation
Choice A rationale:
Preparing an endotracheal tube for intubation is not the first action the nurse should take in this situation. Intubation is an invasive procedure and should be reserved for cases where other, less invasive methods of airway management have failed.
Choice B rationale:
Inserting a plastic oral airway may help maintain the airway in some situations, but it is not the first action to take when the client's airway is obstructing and their oxygen saturation is low.
Choice C rationale:
Providing oxygen using a manual resuscitation bag (bag-valve-mask device) is the correct first action. This allows the nurse to manually assist the client's breathing and deliver oxygen more effectively than just providing supplemental oxygen through a nasal cannula or face mask.
Choice D rationale:
Performing a head tilt with a chin-lift is a basic airway maneuver, but it may not be sufficient in this situation, especially if the airway is completely obstructed. Providing oxygen with a manual resuscitation bag takes precedence.
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