What does the nurse interpret an intravenous drug incompatibility to mean prior to administering an intravenous push medication?
Diluting a drug will prevent incompatibility.
Give medication as directed by the health care provider regardless of incompatibility.
Mixing incompatible drugs will cause a chemical or physical reaction.
Receive a new order from the health care provider to give medication by another route.
The Correct Answer is C
Choice A rationale
Dilution can sometimes reduce the irritation of a drug on the vein wall, but it is not a universal solution for preventing chemical or physical incompatibilities between two different medications. If two drugs are chemically incompatible, mixing them in a syringe or intravenous line can still result in the formation of a precipitate or the degradation of the active ingredients, regardless of the amount of sterile water or saline added to the mixture.
Choice B rationale
Nurses have a professional and legal responsibility to ensure medication safety, which includes checking for drug-drug or drug-fluid incompatibilities. Administering medications that are known to be incompatible simply because they were ordered by a health care provider is a violation of safety protocols. Such an action could lead to therapeutic failure, the administration of toxic byproducts, or the injection of solid particles into the patient's bloodstream, causing severe harm.
Choice C rationale
Intravenous drug incompatibility refers to a reaction that occurs when two or more drugs are mixed, resulting in a physical or chemical change. Physical incompatibility often manifests as precipitation, cloudiness, or color changes, while chemical incompatibility involves a loss of potency or the creation of toxic compounds. These reactions can block intravenous lines or cause an embolism in the patient. Understanding this allows the nurse to use separate lines or flush thoroughly between medications.
Choice D rationale
While a nurse must address an incompatibility, the first step is usually to look for alternative administration methods, such as using a different IV site or flushing the line with a compatible fluid between doses. Requesting a completely different route of administration from the provider might eventually be necessary if no IV solution is possible, but it is not the definition of an incompatibility nor is it always the immediate or most appropriate clinical intervention required.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
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Correct Answer is B
Explanation
Choice B rationale
Pulseless ventricular tachycardia is a life-threatening cardiac arrest rhythm where the ventricles are contracting so rapidly that there is no effective cardiac output. The ACLS protocol dictates that the most critical intervention is immediate unsynchronized defibrillation. The goal is to deliver an electric shock that simultaneously depolarizes the entire myocardium, allowing the heart's natural pacemaker, the sinoatrial node, to regain control and establish a perfusing rhythm. Every minute delay in defibrillation significantly decreases the chance of survival.
Choice A rationale
Oral beta blockers are used for long-term management of hypertension, heart failure, and stable arrhythmias by blocking the effects of adrenaline on the heart. They have absolutely no role in the emergency treatment of pulseless ventricular tachycardia. In a cardiac arrest scenario, the patient cannot swallow, and the onset of action for oral meds is far too slow. Furthermore, beta blockers decrease heart rate and contractility, which would be counterproductive when trying to restore an active pulse.
Choice C rationale
Carotid sinus massage is a vagal maneuver used to slow down certain types of narrow-complex supraventricular tachycardias in stable patients. It works by stimulating the baroreceptors in the carotid artery to increase parasympathetic tone to the heart. This intervention is entirely ineffective for ventricular arrhythmias and is dangerous to attempt in a pulseless patient. It does nothing to address the rapid, disorganized ventricular firing and wastes precious time that should be spent on CPR and defibrillation.
Choice D rationale
Application of a cooling blanket is a component of targeted temperature management, or therapeutic hypothermia, which may be initiated after a patient has achieved return of spontaneous circulation following a cardiac arrest. The goal is to reduce metabolic demand and protect neurological function. However, it is never an initial intervention for the rhythm itself. The priority remains restoring a pulse through defibrillation and high-quality chest compressions before any post-resuscitation care like temperature management can be considered.
Correct Answer is D
Explanation
Choice D rationale
The change in the endotracheal tube position from 21-cm to 24-cm strongly suggests that the tube has migrated downward, likely entering the right mainstem bronchus. This results in the ventilation of only one lung, which explains the patient's anxiety and restlessness due to declining oxygenation. The first priority is to auscultate the lungs to check for bilateral breath sounds. Normal breath sounds are usually 12 to 20 breaths per minute, and oxygen saturation should be above 94 percent.
Choice A rationale
Notifying the healthcare provider is necessary when a change in the patient's condition or equipment occurs, but it is not the immediate first action. The nurse must first perform a rapid assessment to gather objective data regarding the patient's respiratory status and the impact of the tube displacement. Having information about the presence or absence of bilateral breath sounds and current oxygen saturation levels allows the nurse to provide a more effective and urgent report to the provider.
Choice B rationale
Bagging the patient with 100 percent oxygen is an intervention used for severe distress or suspected tube dislodgement. However, if the tube has simply moved into a mainstem bronchus, bagging through the displaced tube may not provide effective ventilation to both lungs and could potentially cause barotrauma to the ventilated side. The nurse must first assess the lung sounds to confirm the tube's position and the patient's actual ventilatory status before opting for manual bag-valve-mask ventilation.
Choice C rationale
While providing emotional support is important, the patient's anxiety is likely a physiological response to hypoxia caused by the tube's migration into the bronchus. Restlessness is a classic early sign of inadequate oxygenation. Focusing on psychological reassurance before addressing the potential airway compromise is unsafe. The nurse must prioritize physical assessment and corrective actions to ensure the airway is patent and both lungs are being ventilated to resolve the underlying cause of the patient's distress.
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