VATI Green Light Comprehensive 2026/2027 Study Guide | ACTUAL-Style
Virtual ATI Green Light Comprehensive Practice Questions & Answers,
ATI Virtual-ATI NCLEX-RN Comprehensive Exam Prep, Verified Answers,
Detailed Rationales, NCLEX Readiness, Comprehensive Predictor, Clinical
Judgment, Next Generation NCLEX (NGN), Management of Care, Safety &
Infection Control, Health Promotion & Maintenance, Psychosocial
Integrity, Pharmacology, Adult Medical-Surgical Nursing, Maternal-
Newborn Nursing, Pediatrics, Mental Health, Fundamentals, Leadership,
Community Health, Prioritization, Delegation, Dosage Calculation &
Complete VATI Green Light Review
Question 1: A nurse is caring for a client who has a new prescription for
lithium carbonate. Which of the following laboratory values should the
nurse monitor to evaluate therapeutic effectiveness?
A. Serum sodium level
B. Serum lithium level
C. Serum potassium level
D. Serum calcium level
CORRECT ANSWER: B. Serum lithium level
Rationale: Lithium has a narrow therapeutic index, typically 0.6 to 1.2
mEq/L. Serum lithium levels must be monitored regularly to ensure
therapeutic effectiveness and prevent toxicity. Sodium, potassium, and
calcium levels are not used to evaluate lithium therapy.
Question 2: A nurse is assessing a client who is 2 hours postoperative
following a thyroidectomy. Which of the following findings requires
immediate intervention?
A. Hoarse voice
B. Serum calcium 8.8 mg/dL
C. Difficulty swallowing
D. Stridor with respiratory distress
CORRECT ANSWER: D. Stridor with respiratory distress
Rationale: Stridor and respiratory distress after thyroidectomy indicate
airway obstruction from hematoma or laryngeal edema, a life-threatening
emergency. Hoarseness and difficulty swallowing are expected
postoperative findings. A calcium level of 8.8 mg/dL is within normal limits.
,Question 3: A nurse is preparing to administer digoxin to a client who
has heart failure. Which of the following findings should the nurse
identify as a contraindication to administering the medication?
A. Heart rate 58/min
B. Serum potassium 4.0 mEq/L
C. Blood pressure 110/70 mm Hg
D. Serum digoxin level 0.8 ng/mL
CORRECT ANSWER: A. Heart rate 58/min
Rationale: Digoxin slows the heart rate. The nurse should withhold digoxin if
the apical pulse is below 60/min in adults and notify the provider. A
potassium level of 4.0 mEq/L is normal. Blood pressure of 110/70 mm Hg is
acceptable. A digoxin level of 0.8 ng/mL is within the therapeutic range of
0.5 to 2.0 ng/mL.
Question 4: A nurse is caring for a client who has a prescription for
warfarin. Which of the following laboratory values should the nurse
monitor to evaluate the effectiveness of the medication?
A. aPTT
B. INR
C. Platelet count
D. Hemoglobin
CORRECT ANSWER: B. INR
Rationale: Warfarin therapy is monitored using the INR, with a therapeutic
range typically 2.0 to 3.0 for most indications. The aPTT is used to monitor
heparin therapy, not warfarin. Platelet count and hemoglobin do not reflect
warfarin's anticoagulant effect.
Question 5: A nurse is teaching a client who has a new prescription for
metformin. Which of the following instructions should the nurse
include?
A. Take the medication with food to reduce gastrointestinal upset
B. Expect to experience hypoglycemia while taking this medication
C. Discontinue the medication before any radiological procedure using
contrast
D. Increase alcohol intake to enhance the medication's effects
,CORRECT ANSWER: A. Take the medication with food to reduce
gastrointestinal upset
Rationale: Metformin commonly causes gastrointestinal adverse effects
such as nausea and diarrhea; taking it with food reduces these symptoms.
Metformin alone rarely causes hypoglycemia. It should be held before
procedures involving iodinated contrast due to the risk of acute kidney
injury and lactic acidosis, but the client should not discontinue it
independently. Alcohol should be avoided, not increased, due to the risk of
lactic acidosis.
Question 6: A nurse is assessing a client who is receiving furosemide.
Which of the following findings should the nurse report to the provider
immediately?
A. Urine output of 40 mL/hr
B. Serum potassium 3.0 mEq/L
C. Blood pressure 118/76 mm Hg
D. Weight loss of 0.5 kg since yesterday
CORRECT ANSWER: B. Serum potassium 3.0 mEq/L
Rationale: Furosemide is a loop diuretic that causes potassium loss. A
serum potassium of 3.0 mEq/L indicates hypokalemia, which can
precipitate cardiac dysrhythmias and requires immediate notification.
Urine output of 40 mL/hr is adequate. Blood pressure and weight loss are
acceptable findings.
Question 7: A nurse is preparing to administer intravenous potassium
chloride to a client who has hypokalemia. Which of the following
actions should the nurse take?
A. Administer the medication as an IV push
B. Dilute the medication and infuse via an IV pump
C. Administer the medication rapidly to correct the deficit
D. Add the medication to a bag of 0.9% sodium chloride for gravity infusion
CORRECT ANSWER: B. Dilute the medication and infuse via an IV pump
Rationale: IV potassium must always be diluted and infused using an
infusion pump at a controlled rate, typically not exceeding 10 to 20 mEq/hr.
IV push potassium is lethal. Rapid infusion can cause cardiac arrest.
Gravity infusion does not provide the precise rate control required.
, Question 8: A nurse is assessing a client who is receiving heparin via
continuous IV infusion. Which of the following laboratory values
indicates a therapeutic response to the medication?
A. aPTT of 45 seconds
B. aPTT of 70 seconds
C. INR of 2.5
D. Platelet count of 150,000/mm³
CORRECT ANSWER: B. aPTT of 70 seconds
Rationale: Therapeutic aPTT for heparin therapy is typically 1.5 to 2.5 times
the control value, usually around 60 to 80 seconds. An aPTT of 45 seconds
is subtherapeutic. INR monitors warfarin, not heparin. Platelet count
assesses for heparin-induced thrombocytopenia, not therapeutic effect.
Question 9: A nurse is caring for a client who has a new prescription for
phenytoin. Which of the following instructions should the nurse
include in the teaching?
A. "Take the medication with antacids to prevent stomach upset."
B. "Brush your teeth and gums gently to prevent bleeding."
C. "You may experience a harmless red discoloration of your urine."
D. "Increase your intake of dairy products while taking this medication."
CORRECT ANSWER: B. "Brush your teeth and gums gently to prevent
bleeding."
Rationale: Phenytoin can cause gingival hyperplasia and bleeding
tendencies. Clients should perform meticulous oral care with a soft
toothbrush. Antacids decrease phenytoin absorption. Reddish urine is
associated with rifampin, not phenytoin. Dairy products can interfere with
phenytoin absorption.
Question 10: A nurse is preparing to administer vancomycin IV to a
client. The nurse should plan to infuse the medication over which of the
following time frames?
A. 5 to 10 minutes
B. 15 to 20 minutes
C. 30 to 45 minutes
D. At least 60 minutes
Virtual ATI Green Light Comprehensive Practice Questions & Answers,
ATI Virtual-ATI NCLEX-RN Comprehensive Exam Prep, Verified Answers,
Detailed Rationales, NCLEX Readiness, Comprehensive Predictor, Clinical
Judgment, Next Generation NCLEX (NGN), Management of Care, Safety &
Infection Control, Health Promotion & Maintenance, Psychosocial
Integrity, Pharmacology, Adult Medical-Surgical Nursing, Maternal-
Newborn Nursing, Pediatrics, Mental Health, Fundamentals, Leadership,
Community Health, Prioritization, Delegation, Dosage Calculation &
Complete VATI Green Light Review
Question 1: A nurse is caring for a client who has a new prescription for
lithium carbonate. Which of the following laboratory values should the
nurse monitor to evaluate therapeutic effectiveness?
A. Serum sodium level
B. Serum lithium level
C. Serum potassium level
D. Serum calcium level
CORRECT ANSWER: B. Serum lithium level
Rationale: Lithium has a narrow therapeutic index, typically 0.6 to 1.2
mEq/L. Serum lithium levels must be monitored regularly to ensure
therapeutic effectiveness and prevent toxicity. Sodium, potassium, and
calcium levels are not used to evaluate lithium therapy.
Question 2: A nurse is assessing a client who is 2 hours postoperative
following a thyroidectomy. Which of the following findings requires
immediate intervention?
A. Hoarse voice
B. Serum calcium 8.8 mg/dL
C. Difficulty swallowing
D. Stridor with respiratory distress
CORRECT ANSWER: D. Stridor with respiratory distress
Rationale: Stridor and respiratory distress after thyroidectomy indicate
airway obstruction from hematoma or laryngeal edema, a life-threatening
emergency. Hoarseness and difficulty swallowing are expected
postoperative findings. A calcium level of 8.8 mg/dL is within normal limits.
,Question 3: A nurse is preparing to administer digoxin to a client who
has heart failure. Which of the following findings should the nurse
identify as a contraindication to administering the medication?
A. Heart rate 58/min
B. Serum potassium 4.0 mEq/L
C. Blood pressure 110/70 mm Hg
D. Serum digoxin level 0.8 ng/mL
CORRECT ANSWER: A. Heart rate 58/min
Rationale: Digoxin slows the heart rate. The nurse should withhold digoxin if
the apical pulse is below 60/min in adults and notify the provider. A
potassium level of 4.0 mEq/L is normal. Blood pressure of 110/70 mm Hg is
acceptable. A digoxin level of 0.8 ng/mL is within the therapeutic range of
0.5 to 2.0 ng/mL.
Question 4: A nurse is caring for a client who has a prescription for
warfarin. Which of the following laboratory values should the nurse
monitor to evaluate the effectiveness of the medication?
A. aPTT
B. INR
C. Platelet count
D. Hemoglobin
CORRECT ANSWER: B. INR
Rationale: Warfarin therapy is monitored using the INR, with a therapeutic
range typically 2.0 to 3.0 for most indications. The aPTT is used to monitor
heparin therapy, not warfarin. Platelet count and hemoglobin do not reflect
warfarin's anticoagulant effect.
Question 5: A nurse is teaching a client who has a new prescription for
metformin. Which of the following instructions should the nurse
include?
A. Take the medication with food to reduce gastrointestinal upset
B. Expect to experience hypoglycemia while taking this medication
C. Discontinue the medication before any radiological procedure using
contrast
D. Increase alcohol intake to enhance the medication's effects
,CORRECT ANSWER: A. Take the medication with food to reduce
gastrointestinal upset
Rationale: Metformin commonly causes gastrointestinal adverse effects
such as nausea and diarrhea; taking it with food reduces these symptoms.
Metformin alone rarely causes hypoglycemia. It should be held before
procedures involving iodinated contrast due to the risk of acute kidney
injury and lactic acidosis, but the client should not discontinue it
independently. Alcohol should be avoided, not increased, due to the risk of
lactic acidosis.
Question 6: A nurse is assessing a client who is receiving furosemide.
Which of the following findings should the nurse report to the provider
immediately?
A. Urine output of 40 mL/hr
B. Serum potassium 3.0 mEq/L
C. Blood pressure 118/76 mm Hg
D. Weight loss of 0.5 kg since yesterday
CORRECT ANSWER: B. Serum potassium 3.0 mEq/L
Rationale: Furosemide is a loop diuretic that causes potassium loss. A
serum potassium of 3.0 mEq/L indicates hypokalemia, which can
precipitate cardiac dysrhythmias and requires immediate notification.
Urine output of 40 mL/hr is adequate. Blood pressure and weight loss are
acceptable findings.
Question 7: A nurse is preparing to administer intravenous potassium
chloride to a client who has hypokalemia. Which of the following
actions should the nurse take?
A. Administer the medication as an IV push
B. Dilute the medication and infuse via an IV pump
C. Administer the medication rapidly to correct the deficit
D. Add the medication to a bag of 0.9% sodium chloride for gravity infusion
CORRECT ANSWER: B. Dilute the medication and infuse via an IV pump
Rationale: IV potassium must always be diluted and infused using an
infusion pump at a controlled rate, typically not exceeding 10 to 20 mEq/hr.
IV push potassium is lethal. Rapid infusion can cause cardiac arrest.
Gravity infusion does not provide the precise rate control required.
, Question 8: A nurse is assessing a client who is receiving heparin via
continuous IV infusion. Which of the following laboratory values
indicates a therapeutic response to the medication?
A. aPTT of 45 seconds
B. aPTT of 70 seconds
C. INR of 2.5
D. Platelet count of 150,000/mm³
CORRECT ANSWER: B. aPTT of 70 seconds
Rationale: Therapeutic aPTT for heparin therapy is typically 1.5 to 2.5 times
the control value, usually around 60 to 80 seconds. An aPTT of 45 seconds
is subtherapeutic. INR monitors warfarin, not heparin. Platelet count
assesses for heparin-induced thrombocytopenia, not therapeutic effect.
Question 9: A nurse is caring for a client who has a new prescription for
phenytoin. Which of the following instructions should the nurse
include in the teaching?
A. "Take the medication with antacids to prevent stomach upset."
B. "Brush your teeth and gums gently to prevent bleeding."
C. "You may experience a harmless red discoloration of your urine."
D. "Increase your intake of dairy products while taking this medication."
CORRECT ANSWER: B. "Brush your teeth and gums gently to prevent
bleeding."
Rationale: Phenytoin can cause gingival hyperplasia and bleeding
tendencies. Clients should perform meticulous oral care with a soft
toothbrush. Antacids decrease phenytoin absorption. Reddish urine is
associated with rifampin, not phenytoin. Dairy products can interfere with
phenytoin absorption.
Question 10: A nurse is preparing to administer vancomycin IV to a
client. The nurse should plan to infuse the medication over which of the
following time frames?
A. 5 to 10 minutes
B. 15 to 20 minutes
C. 30 to 45 minutes
D. At least 60 minutes
