The primary health care provider orders an intramuscular injection of phytonadione (AquaMEPHYTON) for the neonate.
The nurse explains to the parents this medication is used to prevent which of the following conditions?
Hypoglycemia.
Hyperbilirubinemia.
Hemorrhage.
Polycythemia.
The Correct Answer is C
Choice A rationale
Hypoglycemia, a condition of low blood glucose (normal range 40-60 mg/dL in neonates), is not prevented by phytonadione (vitamin K). This condition is primarily related to inadequate glucose stores or production, often seen in large or small for gestational age infants or those whose mothers had diabetes. Vitamin K is essential for coagulation factor synthesis, not glucose metabolism regulation.
Choice B rationale
Hyperbilirubinemia, characterized by elevated serum unconjugated bilirubin (jaundice), is not prevented by routine vitamin K administration. This condition results from increased breakdown of fetal red blood cells and the neonate's immature liver function being unable to adequately conjugate and excrete bilirubin. Vitamin K does not directly influence bilirubin processing or excretion pathways.
Choice C rationale
Phytonadione (vitamin K) is administered to neonates to prevent Vitamin K Deficiency Bleeding (VKDB), previously known as hemorrhagic disease of the newborn. Vitamin K is crucial for the liver's synthesis of coagulation factors II, VII, IX, and X. Neonates have low vitamin K stores and insufficient gut flora to produce it, making supplementation necessary to prevent life-threatening bleeding.
Choice D rationale
Polycythemia is an abnormally high concentration of red blood cells (hematocrit > 65.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
Inserting a padded tongue blade or any object into the mouth during a seizure is strictly contraindicated as it can cause injury, such as chipping teeth, lacerating gums, or triggering severe jaw clenching, potentially causing airway obstruction or aspiration, which outweighs the risk of the child biting their tongue.
Choice B rationale
Positioning a child in a sitting position during a generalized seizure is dangerous because it provides no support and increases the risk of head injury and aspiration. The child should instead be placed on the floor in a side-lying position, known as the recovery position, to facilitate drainage of oral secretions and maintain a patent airway.
Choice C rationale
Initiating rescue breathing is inappropriate as soon as seizure activity begins, because the child is often breathing but may have irregular or shallow respirations. Interventions should focus on safety and maintaining a patent airway by positioning. Rescue breathing is only indicated if the child stops breathing after the seizure, not during the ictal phase.
Choice D rationale
Moving objects out of the way is the most important immediate safety measure during a tonic-clonic seizure. This action protects the child from striking hard, sharp, or hot objects in the immediate vicinity during uncontrolled, involuntary movements, preventing trauma such as head injury or fracture.
Correct Answer is A
Explanation
Choice A rationale
Antiemetics are most effectively used by administering them proactively, before the chemotherapy agent is started, which is known as prophylactic use. This method allows the medication to achieve therapeutic serum levels and occupy receptors before the emetogenic chemicals stimulate the vomiting center in the brain, thus blocking the nausea pathway.
Choice B rationale
Waiting for nonpharmacologic methods to fail before using antiemetics is ineffective management. Chemotherapy-induced nausea and vomiting are best controlled with aggressive, scheduled pharmacologic intervention from the start, as it is far harder to stop vomiting once the emetic cycle has been established.
Choice C rationale
Starting antiemetics only when nausea begins is reactive and allows the patient to experience unnecessary distress and potential nutritional compromise. The goal in chemotherapy management is prevention; therefore, antiemetics must be started before the patient's exposure to the emetogenic stimuli.
Choice D rationale
Providing antiemetics as needed, or PRN, is a less effective strategy for chemotherapy-induced nausea and vomiting. The intensity of this type of emesis necessitates a scheduled regimen to consistently maintain therapeutic drug levels and prevent the overwhelming onset of nausea and vomiting, which can be difficult to manage once it starts.
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