A postoperative client is admitted to the intensive care unit (ICU) with an inflated pressure infuser containing a solution of heparin 2 units/ml attached to an intra-arterial (IA) cannula. Which finding indicates that the heparin infusion has achieved its therapeutic use?
Heparin is infused in less than four hours.
Systolic blood pressure greater than 120 mm Hg.
No knee pain upon forced dorsiflexion.
Intra-arterial cannula remains patent.
The Correct Answer is D
A. Heparin is infused in less than four hours. The heparinized solution used in an intra-arterial (IA) pressure infuser is not intended for systemic anticoagulation but rather to maintain catheter patency. The infusion rate is typically slow and continuous, and completing the infusion in less than four hours is not an indicator of effectiveness.
B. Systolic blood pressure greater than 120 mm Hg. Heparin in an IA pressure infuser does not directly affect blood pressure. Its purpose is to prevent clot formation within the catheter, ensuring uninterrupted arterial pressure monitoring. BP readings are monitored separately and are not an indicator of heparin’s therapeutic effect.
C. No knee pain upon forced dorsiflexion. This assessment is used to evaluate deep vein thrombosis (DVT) (Homan's sign), which is not related to arterial catheter function. The low-dose heparin in the pressure infuser does not provide systemic anticoagulation, making this finding irrelevant.
D. Intra-arterial cannula remains patent. The primary purpose of heparinized flush solutions in IA lines is to prevent clot formation within the catheter and maintain patency for continuous blood pressure monitoring or arterial blood sampling. A patent arterial line confirms that the heparin infusion is achieving its intended effect.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Degree of pain using a 10-point scale. Pain assessment is important, but it is not the priority in an emergency trauma situation. Clients involved in motor vehicle collisions (MVCs) without a helmet are at high risk for life-threatening injuries, including hemorrhage and shock. The nurse must first assess vital signs to determine hemodynamic stability.
B. Pulse and blood pressure. The primary concern in trauma patients is circulation and perfusion. Assessing pulse and blood pressure helps determine if the client is experiencing shock, hemorrhage, or traumatic brain injury (TBI)-related autonomic dysfunction. In trauma resuscitation, the ABCs (Airway, Breathing, Circulation) guide assessment priorities, making circulatory status the first concern after ensuring airway patency.
C. Balance and coordination. A neurological assessment for balance and coordination is not a priority in a critically injured trauma patient. Severe injuries, including intracranial hemorrhage, cervical spine trauma, or internal bleeding, must be ruled out before assessing fine motor function.
D. Bilateral pupillary reaction to light. Pupillary response is part of a neurological assessment and is crucial in identifying traumatic brain injury. However, vital signs must be assessed first to determine hemodynamic stability, as untreated shock or hemorrhage can lead to rapid deterioration or death.
Correct Answer is D
Explanation
A. Hyperglycemia. While elevated blood glucose can occur in acute pancreatitis due to pancreatic inflammation impairing insulin secretion, it is not an electrolyte imbalance. The question specifically asks about electrolyte-related manifestations.
B. Hypotension. Hypotension in acute pancreatitis is often due to fluid shifts (third-spacing) and systemic inflammation, rather than a direct electrolyte imbalance. Though dehydration and electrolyte losses can contribute to hypotension, this is not the most specific sign of an electrolyte disturbance.
C. Paralytic ileus and abdominal distention. Hypokalemia can lead to paralytic ileus, but ileus and distention are also caused by peritoneal irritation, inflammation, and impaired motility due to pancreatitis itself. While potassium imbalance could contribute, this is not the most direct electrolyte-related symptom.
D. Muscle twitching and digit numbness. Hypocalcemia is a common electrolyte imbalance in acute pancreatitis, caused by fatty acid breakdown binding calcium, leading to saponification. This results in neuromuscular excitability, causing muscle twitching, paresthesia (numbness/tingling), and positive Chvostek’s or Trousseau’s signs. These symptoms are clear indicators of an electrolyte disturbance related to pancreatitis.
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