A nurse is reviewing laboratory results for a client who is taking warfarin. Which of the following laboratory tests determines if the dose of medication is within the recommended target range?

Bleeding time

Factor VIII

aPTT

INR

Answer and Explanation

The Correct Answer is D

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.

Nursing Test Bank

Quiz #1: RN Exams Pharmacology Exams Quiz #2: RN Exams Medical-Surgical Exams Quiz #3: RN Exams Fundamentals Exams Quiz #4: RN Exams Maternal-Newborn Exams Quiz #5: RN Exams Anatomy and Physiology Exams Quiz #6: RN Exams Obstetrics and Pediatrics Exams Quiz #7: RN Exams Fluid and Electrolytes Exams Quiz #8: RN Exams Community Health Exams Quiz #9: RN Exams Promoting Health across the lifespan Exams Quiz #10: RN Exams Multidimensional care Exams

Get 100+ Naxlex Exit Exams for $79 Try Naxlex NCLEX-RN (14 Day Free-Trial)

Naxlex Comprehensive Predictor Exams

Quiz #1: Naxlex RN Comprehensive online practice 2019 B with NGN Quiz #2: Naxlex RN Comprehensive Predictor 2023 Quiz #3: Naxlex RN Comprehensive Predictor 2023 Exit Exam A Quiz #4: Naxlex HESI Exit LPN Exam Quiz #5: Naxlex PN Comprehensive Predictor PN 2020 Quiz #6: Naxlex VATI PN Comprehensive Predictor 2020 Quiz #8: Naxlex PN Comprehensive Predictor 2023 - Exam 1 Quiz #10: Naxlex HESI PN Exit exam Quiz #11: Naxlex HESI PN EXIT Exam 2

Free Nursing Study Resources

Correct Answer is ["A","D","E"]

Explanation

Choice A reason: A quiet environment reduces sensory stimulation, which can elevate intracranial pressure (ICP) by increasing cerebral blood flow. Minimizing noise helps stabilize intracranial dynamics, preventing exacerbation of brain injury. This intervention supports neurological stability, critical in traumatic brain injury management to avoid secondary damage.
Choice B reason: Monitoring vital signs every 8 hours is inadequate for increased ICP, which requires frequent checks (e.g., every 1-2 hours). Changes in blood pressure or respiration signal worsening ICP, risking herniation. Infrequent monitoring delays detection of neurological deterioration, compromising timely intervention in brain injury.
Choice C reason: Coughing and deep breathing increase intrathoracic pressure, elevating ICP by impeding cerebral venous return. This is contraindicated in traumatic brain injury, as it risks worsening cerebral edema or causing herniation, potentially leading to severe neurological damage or fatal outcomes in affected clients.
Choice D reason: A 30-degree head-of-bed elevation promotes cerebral venous drainage, reducing ICP. This position optimizes cerebral perfusion pressure, minimizing venous congestion in traumatic brain injury. It is a critical intervention to prevent secondary brain injury, supporting neurological recovery by stabilizing intracranial dynamics effectively.
Choice E reason: Stool softeners prevent straining during bowel movements, which increases intrathoracic and intracranial pressure. In traumatic brain injury, straining risks exacerbating ICP, potentially causing herniation. This intervention ensures smoother bowel movements, maintaining ICP stability and supporting safe management of brain injury.

A. WBC count 1,300/mm³ B. Hemoglobin 16 g/dL C. Fasting blood glucose 124 mg/dL D. Platelet count 200,000/mm³

Correct Answer is A

Explanation

Choice A reason: A WBC count of 1,300/mm³ indicates severe leukopenia, a contraindication for clozapine due to its risk of agranulocytosis. Low white cells increase infection risk, requiring immediate discontinuation or monitoring per FDA guidelines, making this the critical finding to identify.
Choice B reason: Hemoglobin of 16 g/dL is within normal range (14-18 g/dL) and does not contraindicate clozapine use. Normal hemoglobin supports adequate oxygen transport, so this finding is unremarkable and incorrect for identifying a contraindication.
Choice C reason: Fasting blood glucose of 124 mg/dL indicates mild elevation but is not a contraindication for clozapine, which may worsen glucose control. Monitoring is needed, but this level does not preclude use, making it incorrect.
Choice D reason: Platelet count of 200,000/mm³ is normal (150,000-450,000/mm³) and does not contraindicate clozapine. Normal platelets ensure proper clotting, so this finding is not a concern for clozapine administration, making it incorrect.

View Question and Answer

Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.

Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today

A nurse is reviewing laboratory results for a client who is taking warfarin. Which of the following laboratory tests determines if the dose of medication is within the recommended target range?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse is caring for a client who has increased intracranial pressure following a traumatic brain injury. Which of the following actions should the nurse take? (Select all that apply)

Correct Answer is ["A","D","E"]

Explanation

A nurse is reviewing the medical record of a male client who has schizophrenia and is taking clozapine. Which of the following findings should the nurse identify as a contraindication to the administration of clozapine?

Correct Answer is A

Explanation

A nurse is providing teaching to the parents of a newborn about newborn genetic screening. Which of the following statements should the nurse include in the teaching?

A nurse is completing an admission assessment for a client who has narcissistic personality disorder. Which of the following findings should the nurse expect?

A nurse at a community health clinic is planning care for an adolescent who recently learned that she is pregnant and is concerned about her ability to afford and care for her baby. Which of the following actions should the nurse take?

A school nurse is teaching a parent about absence seizures. Which of the following information should the nurse include?

A nurse is providing teaching to a client who is postpartum and interested in information about contraception. Which of the following instructions should the nurse include?

A nurse is assessing a client who is postoperative following abdominal surgery. Which of the following findings should indicate to the nurse that the client is at risk for developing a surgical wound infection?

A nurse on a medical-surgical unit is performing medication reconciliation for a newly admitted client. Which of the following actions should the nurse take?

A nurse is caring for a client who has lung cancer and has a sealed radiation implant. Which of the following actions should the nurse take? (Select all that apply)