A nurse is reviewing laboratory data from a client who has pulmonary embolism and is receiving IV heparin. Which of the following findings should the nurse report to the provider?
Partial thromboplastin time (PTT) 55 seconds
Hematocrit 45%
White blood cell count 8,000/mm³
Platelets 74,000/mm³
The Correct Answer is D
A. Partial thromboplastin time (PTT) 55 seconds: This PTT value is within the therapeutic range for a client on heparin therapy.
B. Hematocrit 45%: This hematocrit value is within normal limits and is not concerning.
C. White blood cell count 8,000/mm³: A WBC count of 8,000/mm³ is within the normal range and does not require reporting.
D. Platelets 74,000/mm³: A low platelet count (thrombocytopenia) can indicate heparin-induced thrombocytopenia (HIT), a potentially serious complication of heparin therapy.
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Correct Answer is D
Explanation
A. Overweight. While weight can affect medication metabolism, it does not specifically increase risk with pseudoephedrine.
B. Migraine headaches. Migraine headaches are not contraindicated with pseudoephedrine, although some stimulants can increase headaches.
C. Eczema. Pseudoephedrine does not typically affect eczema.
D. Hypertension. Pseudoephedrine is a decongestant that can increase blood pressure, so it should be used with caution in clients with hypertension.
Correct Answer is B
Explanation
A. Creatine kinase-myocardial band (CK-MB) test: While CK-MB is also a marker of myocardial injury, it is less specific than troponin and can be elevated in other conditions, such as muscle injury.
B. Troponin T test. The Troponin T test is highly specific and sensitive for myocardial injury and is considered the gold standard for diagnosing a myocardial infarction. Troponin levels rise within hours of cardiac muscle injury and remain elevated for days, providing an early and reliable indicator of cardiac muscle damage.
C. Brain natriuretic peptide (BNP) test. BNP levels are used to assess heart failure and do not indicate acute cardiac muscle injury.
D. Creatine kinase (CK) test. CK measures overall muscle injury, not specific to cardiac muscle.