A nurse is caring for a client who is receiving heparin by continuous IV infusion for treatment of venous thrombosis. Which of the following laboratory values should the nurse monitor for in order to titrate the heparin dose?
Platelet function assay
aPTT
INR
Amylase
The Correct Answer is B
When caring for a client receiving heparin by continuous IV infusion for the treatment of venous thrombosis, the nurse should monitor the client's aPTT (Activated Partial Thromboplastin Time) to titrate the heparin dose.
Heparin is an anticoagulant medication used to prevent and treat blood clots. The aPTT is a coagulation test that measures the time it takes for the blood to clot when a specific activator is added. Monitoring the aPTT is a standard method for assessing the anticoagulant effect of heparin and ensuring that the client's blood remains within the desired therapeutic range.
The therapeutic range for aPTT while on heparin therapy varies depending on the indication and the client's condition but is generally maintained at a level that prolongs the clotting time enough to prevent and treat thrombosis while avoiding excessive bleeding risk.
Let's go through the other options:
A. Platelet function assay: While monitoring platelet function is essential for assessing overall hemostasis and platelet function, it is not specifically used for titrating heparin doses. Platelet function assays are more commonly used to assess the function of platelets in the context of platelet disorders or antiplatelet medication therapy.
C. INR (International Normalized Ratio): The INR is used to monitor the effect of vitamin K antagonist anticoagulants, such as warfarin, and is not the appropriate test for monitoring heparin therapy.
D. Amylase: Amylase is an enzyme produced by the pancreas and salivary glands and is not relevant for monitoring heparin therapy. Elevated amylase levels are typically associated with pancreatitis and not related to heparin treatment.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
When caring for a client receiving a continuous infusion of total parenteral nutrition (TPN), the nurse should implement the intervention of checking the client's blood glucose level regularly. TPN is a highly concentrated intravenous nutrition solution containing glucose, amino acids, lipids, vitamins, and minerals, and it is used to provide complete nutrition when the client cannot take oral nutrition.
Monitoring blood glucose levels regularly is essential because TPN is rich in glucose, which can significantly affect the client's blood sugar levels. Hyperglycemia (high blood sugar) is a potential complication of TPN infusion. Regular blood glucose monitoring allows the nurse to detect and address any changes in blood sugar levels promptly and to adjust the TPN infusion rate or administer insulin, if necessary, to maintain the client's blood sugar within the target range.
Let's go through the other options:
A. Change the TPN infusion tubing once every 3 days: While changing the TPN infusion tubing regularly is a good practice to maintain asepsis and prevent infection, it is not the priority intervention in this situation. Regularly checking the client's blood glucose level is more crucial to monitor the effects of TPN on blood sugar levels.
C. Insert the peripheral IV catheter for administration: Total parenteral nutrition is a hypertonic solution that can cause irritation and damage to peripheral veins. It is usually administered through a central venous catheter (CVC) placed in a large vein, such as the subclavian or jugular vein. Inserting a peripheral IV catheter for TPN administration is not recommended due to the risk of vein damage and thrombosis.
D. Monitor the client's weight every 3 days: Monitoring the client's weight is an important part of assessing their nutritional status and fluid balance. However, the priority intervention for a client receiving TPN is checking their blood glucose level regularly, as hyperglycemia is a common and significant concern in TPN administration.

Correct Answer is C
Explanation
A. Urinary retention: While urinary retention can be a side effect of meperidine and other opioids, it is not the priority assessment before administering the medication. Urinary retention is a concern but is not immediately life-threatening compared to other potential side effects of opioids, such as respiratory depression. Assessing urinary retention is important, but it is not the primary concern in this situation.
B. Vomiting: Vomiting can also be a side effect of opioids, including meperidine. While it is essential to assess for vomiting and its potential impact on the client's overall condition, it is not the priority assessment before administering the medication. Vomiting can be managed, and the nurse should address it as needed. However, the priority assessment is one that can affect the client's immediate safety and well-being, such as respiratory rate and potential respiratory depression.
C. Respiratory rate: This is the correct answer. The priority assessment before administering meperidine is the client's respiratory rate. Opioids can cause respiratory depression, leading to reduced breathing and inadequate ventilation. Monitoring the respiratory rate allows the nurse to detect any signs of respiratory distress or inadequate breathing, enabling them to intervene promptly to prevent serious complications.
D. Level of consciousness: While assessing the client's level of consciousness is essential for overall assessment and monitoring, it is not the priority assessment before administering meperidine. Respiratory depression due to opioid use can occur even when the client is conscious. However, if respiratory depression occurs, it can lead to a decrease in consciousness and potentially unconsciousness, making the assessment of respiratory rate more critical to prevent such complications.

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
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.
