Question

The nurse observes air bubbles in the IV tubing during priming. Which action will the nurse take?

Answer 1

Correct Answers:

Re-prime the tubing until the air bubbles are removed.

Rationale :

🔷 The nurse should remove air bubbles from IV tubing before connecting or starting the infusion to prevent air from entering the vascular system.

🔷 Re-priming the tubing allows the IV solution to completely fill the line and push trapped air out safely.

🔷 Even though very tiny bubbles may not usually cause harm, visible air bubbles should not be ignored during priming.

🔷 Proper priming helps maintain safe IV therapy and reduces the risk of complications such as air embolism.

🔷 The nurse should inspect the tubing carefully before infusion begins.

Why the others are not best:

❌ Flush the tubing rapidly to force the air into the vein — Air should never be forced into the vein because this can place the patient at risk for an air embolism. Rapid flushing also increases the chance of unsafe IV administration.

❌ Lower the IV solution bag below the insertion site immediately — Lowering the bag does not remove air from the tubing. It may also interrupt flow or cause blood to back up into the tubing.

❌ Continue the infusion because small bubbles are expected — Visible air bubbles should be removed before infusion. Continuing without correction is unsafe nursing practice.

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Answer 2

Correct Answers:

To ensure no staff members are touching the patient or bed.

Rationale :

💎 The nurse announces “clear” before defibrillation to protect staff from accidental electrical shock.

💎 Defibrillation delivers a high-energy electrical current through the patient’s chest to stop the chaotic rhythm of ventricular fibrillation.

💎 Anyone touching the patient, bed, or equipment during shock delivery may become part of the electrical pathway.

💎 Calling “clear” gives all team members time to step away and visually confirm safety.

💎 The nurse should also quickly scan the area before delivering the shock.

Why the others are not best:

❌ To verify the cardiac rhythm one final time — Rhythm verification is important, but that is not the reason for saying “clear.” The word “clear” is specifically a safety warning before shock delivery.

❌ To confirm the synchronized mode is activated — Ventricular fibrillation requires unsynchronized defibrillation, not synchronized cardioversion. Synchronized mode is used for certain unstable rhythms with a pulse.

❌ To allow the patient to exhale before shock delivery — Patient exhalation is not the purpose of the “clear” command. The priority is staff safety during electrical shock delivery.

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Answer 3

Correct Answers

Pump rates are calculated in mL/hr [ correct ]
gtt/min calculations are rounded to whole numbers [ correct ]
Decimal drop rates are used for gravity infusions [ incorrect ]
Drop factor tubing is used in gtt/min calculations [ correct ]

Rationale :

Pump rates are calculated in mL/hr — Correct

🔷 Electronic infusion pumps deliver IV fluids based on the number of milliliters infused each hour.

🔷 The nurse calculates the total volume of solution and divides it by the number of hours prescribed to determine the pump setting.

🔷 IV pumps provide more accurate and controlled fluid administration than gravity infusions, especially for medications that require precise dosing.

🔷 Using mL/hr helps reduce medication and fluid administration errors.

🔷 Nurses must always verify the provider’s prescription, patient condition, and pump settings before starting the infusion.

gtt/min calculations are rounded to whole numbers — Correct

💎 Gravity infusions are regulated by manually counting the number of drops entering the drip chamber each minute.

💎 Since drops cannot be measured in fractions or decimals during manual counting, the final answer must be rounded to the nearest whole number.

💎 Accurate rounding helps maintain safe and consistent IV fluid administration.

💎 Nurses monitor the drip chamber closely because movement, tubing position, or patient activity can affect the flow rate.

💎 Correct calculation and monitoring are important to prevent fluid overload or inadequate infusion.

Decimal drop rates are used for gravity infusions — Incorrect

✨ Gravity infusion rates are not left as decimal numbers because nurses cannot accurately count partial drops.

✨ Any decimal obtained during calculation must be rounded to a whole number before adjusting the IV flow rate.

✨ Leaving a decimal value could lead to inaccurate fluid administration and inconsistent infusion rates.

✨ Manual gravity infusions depend on visual counting, making whole-number rates necessary for practical bedside use.

✨ Safe nursing practice requires using rounded whole numbers for all gtt/min gravity calculations.

Drop factor tubing is used in gtt/min calculations — Correct

🌿 The drop factor indicates how many drops equal 1 mL of IV fluid and is printed on the IV tubing package.

🌿 It is essential for calculating gravity infusion rates because different tubing types produce different drop sizes.

🌿 Macrodrip tubing delivers larger drops and is commonly used for routine fluid replacement, while microdrip tubing delivers smaller drops for more precise administration.

🌿 Without the correct drop factor, the nurse cannot accurately determine the proper gtt/min flow rate.

🌿 Correct use of drop factor tubing helps ensure safe and effective IV therapy administration.

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Answer 4

Correct Answers:

83 mL/hr

Rationale :

🔷 The nurse calculates the IV pump rate by dividing the total amount of fluid by the total number of hours prescribed. 🔷 Formula: 500 mL divided by 6 hr = 83.3 mL/hr 🔷 Infusion pumps are rounded to the nearest whole number, so the nurse will set the pump at 83 mL/hr. 🔷 Accurate IV calculations are important to prevent fluid overload, dehydration, or delayed therapy. 🔷 The nurse should always verify the provider’s order, IV solution, and pump settings before starting the infusion. ❌ 125 mL/hr — This rate is too fast and would infuse the fluid earlier than prescribed. ❌ 100 mL/hr — This is an incorrect calculation and would also infuse the solution too quickly. ❌ 63 mL/hr — This rate is too slow and would delay the ordered therapy.

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Answer 5

Correct Answers:

P wave

Rationale :

💎 The P wave represents atrial depolarization, which is the electrical stimulation that causes the atria to contract. 💎 Electrical impulses begin in the sinoatrial SA node and travel through the atria, producing the P wave on the ECG. 💎 A normal P wave shows that atrial electrical activity is occurring properly before ventricular contraction. 💎 Nurses assess the P wave for shape, rhythm, and presence during cardiac rhythm interpretation. 💎 Changes or absence of P waves may indicate atrial dysrhythmias or conduction abnormalities. ❌ T wave — The T wave represents ventricular repolarization, or ventricular recovery after contraction. ❌ QRS complex — The QRS complex represents ventricular depolarization and ventricular contraction. ❌ ST segment — The ST segment reflects the time between ventricular depolarization and repolarization and is evaluated for ischemia or injury.

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Answer 6

Correct Answers:

Irregular rhythm without distinct P waves.

Rationale :

🔷 Atrial fibrillation is identified by an irregular rhythm and the absence of clear, consistent P waves.

🔷 In atrial fibrillation, the atria do not contract in an organized way because electrical impulses fire rapidly and irregularly.

🔷 This causes the ventricular response to become irregularly irregular, which often leads to symptoms such as palpitations, shortness of breath, fatigue, or dizziness.

🔷 The nurse should recognize this rhythm because atrial fibrillation increases the risk for blood clot formation and stroke due to poor atrial emptying.

🔷 Assessment should include the patient’s heart rate, blood pressure, oxygenation, symptoms, and risk for decreased cardiac output.

❌ Chaotic rhythm without measurable heart rate — This describes ventricular fibrillation, not atrial fibrillation. Ventricular fibrillation is a life-threatening rhythm with no effective cardiac output.

❌ Regular rhythm with distinct P waves — This suggests a more organized rhythm such as normal sinus rhythm. Atrial fibrillation does not have distinct, consistent P waves.

❌ Wide QRS complexes with regular ventricular rhythm — This is more consistent with ventricular tachycardia or another ventricular rhythm. Atrial fibrillation is usually recognized by an irregular rhythm without distinct P waves.

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Answer 7

Correct Answers:

Immediate defibrillation

Rationale :

💎 Ventricular fibrillation is a medical emergency because the ventricles quiver instead of pumping blood effectively.

💎 The patient has no effective cardiac output, which means blood is not being circulated to the brain, heart, and vital organs.

💎 The priority treatment is immediate unsynchronized defibrillation to stop the chaotic electrical activity and allow the heart’s normal pacemaker to restart.

💎 Defibrillation should be performed as quickly as possible along with CPR and emergency resuscitation measures.

💎 Delayed defibrillation greatly decreases the chance of survival.

❌ Barium enema — This is a diagnostic test for the lower gastrointestinal tract. It has no role in treating ventricular fibrillation.

❌ Capsule endoscopy — This evaluates the small intestine using a swallowed camera capsule. It is unrelated to emergency cardiac rhythm treatment.

❌ Routine pacemaker check only — A routine pacemaker check is not appropriate for ventricular fibrillation. Ventricular fibrillation requires immediate emergency treatment, not routine monitoring.

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Answer 8

Correct Answers:

Antiarrythic medication

Rationale :

✨ A stable patient with ventricular tachycardia may have a pulse and adequate blood pressure, so treatment can include antiarrhythmic medication.

✨ Antiarrhythmic medications help slow or control abnormal ventricular electrical activity and may prevent the rhythm from worsening.

✨ The nurse should continue to assess for signs of instability, including hypotension, chest pain, altered mental status, severe shortness of breath, or loss of pulse.

✨ If the patient becomes unstable, treatment may progress to synchronized cardioversion or emergency resuscitation based on the patient’s condition.

✨ Ventricular tachycardia is serious because it can reduce cardiac output and may deteriorate into ventricular fibrillation.

❌ Fluid restriction only — Fluid restriction does not correct the abnormal ventricular rhythm. It may be used for certain conditions such as heart failure, but it is not the treatment for ventricular tachycardia.

❌ Colonoscopy — A colonoscopy evaluates the colon and is unrelated to cardiac rhythm management.

❌ Capsule endoscopy — Capsule endoscopy evaluates the gastrointestinal tract, not the heart. It does not treat ventricular tachycardia.

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Answer 9

Correct Answers:

Apply surgical masks to the nurse and patient before beginning care

Rationale :

🔷 PICC line dressing changes require measures that reduce the risk of introducing microorganisms into a central venous access site.

🔷 Applying surgical masks to both the nurse and patient helps prevent respiratory droplets from contaminating the sterile field or insertion site.

🔷 The mask should be applied before removing the old dressing because the site becomes exposed once the dressing is removed.

🔷 This is especially important because a PICC line tip terminates near the central circulation, where infection can become serious quickly.

🔷 The nurse should then perform hand hygiene, apply gloves, remove the old dressing carefully, assess the site, use sterile technique, cleanse as ordered, and apply a new sterile transparent dressing.

❌ Apply clean gloves to both hands before beginning the procedure — Clean gloves are used when removing the old dressing, but this option is less complete because the key safety action before exposing the PICC site is applying masks to prevent droplet contamination.

❌ Label the transparent dressing with date and initials first — The dressing is labeled after the new sterile dressing is applied. Labeling first does not protect the insertion site from contamination.

❌ Clean the insertion site with chlorhexidine before removing dressing — The insertion site cannot be properly cleaned while the old dressing is still covering it. Cleansing occurs after the old dressing is removed and the site is exposed.

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Answer 10

Correct Answers:

Atrial fibrillation

Rationale :

💎 Atrial fibrillation is characterized by an irregular rhythm, no identifiable P waves, and usually a narrow QRS complex if ventricular conduction is normal.

💎 The absence of clear P waves occurs because the atria are firing rapidly and chaotically instead of depolarizing from one organized impulse.

💎 A QRS interval less than 0.10 seconds indicates that ventricular conduction is still relatively narrow and not originating from a wide ventricular rhythm.

💎 Patients with atrial fibrillation may report palpitations, shortness of breath, dizziness, fatigue, or weakness due to decreased atrial contribution to ventricular filling.

💎 The nurse should monitor for decreased cardiac output and recognize that atrial fibrillation increases the risk for atrial clot formation and stroke.

❌ Sinus bradycardia — Sinus bradycardia has a regular rhythm with identifiable P waves before each QRS complex. The heart rate is slow, but the rhythm still originates from the SA node.

❌ Normal sinus rhythm — Normal sinus rhythm has a regular rhythm, consistent P waves, and a normal rate. The finding of no identifiable P waves does not match normal sinus rhythm.

❌ Ventricular tachycardia — Ventricular tachycardia usually has wide QRS complexes and originates from the ventricles. The question describes a narrow QRS interval, which supports atrial fibrillation instead.

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Prompts	correct	incorrect
Pump rates are calculated in mL/hr
gtt/min calculations are rounded to whole numbers
Decimal drop rates are used for gravity infusions
Drop factor tubing is used in gtt/min calculations

VNSG 2413 unit 3 exam

No.

1 :
The nurse observes air bubbles in the IV tubing during priming. Which action will the nurse take?

2 :
The nurse prepares to defibrillate a patient in ventricular fibrillation. Why does the nurse announce "clear" before delivering the shock?

3 :
The nurse calculates IV flow rates.

Correct Answers

4 :
The nurse prepares to infuse 500 mL of 0.9% NS over 6 hours by infusion pump. Which rate does the nurse set?

5 :
The nurse reviews the components of the cardiac cycle. Which ECG component represents atrial depolarization?

6 :
A nurse reviews telemetry findings for a patient who suddenly reports palpitations and shortness of breath. Which telemetry finding requires the nurse to identify atrial fibrillation?

7 :
The nurse reviews care for a patient with ventricular fibrillation. Which treatment does the nurse anticipate?

8 :
The nurse reviews the treatment plan for a stable patient with ventricular tachycardia. Which treatment does the nurse anticipate?

9 :
The nurse performs a PICC line dressing change. Which action does the nurse perform before removing the old dressing?

10 :
The nurse reviews an ECG strip with an irregular rhythm, no identifiable P waves, and a QRS interval less than 0.10 seconds. Which rhythm does the nurse identify?

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VNSG 2413 unit 3 exam

No.

1 : The nurse observes air bubbles in the IV tubing during priming. Which action will the nurse take?

2 : The nurse prepares to defibrillate a patient in ventricular fibrillation. Why does the nurse announce "clear" before delivering the shock?

3 : The nurse calculates IV flow rates.

Correct Answers

4 : The nurse prepares to infuse 500 mL of 0.9% NS over 6 hours by infusion pump. Which rate does the nurse set?

5 : The nurse reviews the components of the cardiac cycle. Which ECG component represents atrial depolarization?

6 : A nurse reviews telemetry findings for a patient who suddenly reports palpitations and shortness of breath. Which telemetry finding requires the nurse to identify atrial fibrillation?

7 : The nurse reviews care for a patient with ventricular fibrillation. Which treatment does the nurse anticipate?

8 : The nurse reviews the treatment plan for a stable patient with ventricular tachycardia. Which treatment does the nurse anticipate?

9 : The nurse performs a PICC line dressing change. Which action does the nurse perform before removing the old dressing?

10 : The nurse reviews an ECG strip with an irregular rhythm, no identifiable P waves, and a QRS interval less than 0.10 seconds. Which rhythm does the nurse identify?

1 :
The nurse observes air bubbles in the IV tubing during priming. Which action will the nurse take?

2 :
The nurse prepares to defibrillate a patient in ventricular fibrillation. Why does the nurse announce "clear" before delivering the shock?

3 :
The nurse calculates IV flow rates.

4 :
The nurse prepares to infuse 500 mL of 0.9% NS over 6 hours by infusion pump. Which rate does the nurse set?

5 :
The nurse reviews the components of the cardiac cycle. Which ECG component represents atrial depolarization?

6 :
A nurse reviews telemetry findings for a patient who suddenly reports palpitations and shortness of breath. Which telemetry finding requires the nurse to identify atrial fibrillation?

7 :
The nurse reviews care for a patient with ventricular fibrillation. Which treatment does the nurse anticipate?

8 :
The nurse reviews the treatment plan for a stable patient with ventricular tachycardia. Which treatment does the nurse anticipate?

9 :
The nurse performs a PICC line dressing change. Which action does the nurse perform before removing the old dressing?

10 :
The nurse reviews an ECG strip with an irregular rhythm, no identifiable P waves, and a QRS interval less than 0.10 seconds. Which rhythm does the nurse identify?