GREEN LIGHT EXAM | Mastery-Level Study Set | Graded A+
EXAMINATION PARAMETERS:
● Total Questions: 180
● Total Time: 180 minutes (3 hours)
● Format: Three consecutive proctored-level sections, no breaks
● Passing Benchmark: >95% probability of NCLEX-RN first-attempt pass
● Target Performance: "Green Light" Readiness
SECTION 1: INTEGRATED CLINICAL JUDGMENT (Q1-60)
Time: 60 minutes | Focus: Rapid Recognition of Life-Threatening Conditions
Q1: A nurse is caring for a client 8 hours post-coronary artery bypass graft (CABG) x3.
The client is on a dobutamine drip at 5 mcg/kg/min. Trending Data over 2 hours:
Cardiac index decreased from 2.8 to 1.9 L/min/m²; mixed venous oxygen saturation
(SvO₂) dropped from 75% to 58%; pulmonary artery wedge pressure (PAWP) increased
from 12 to 22 mmHg; and the client reports increasing dyspnea. Which complication
should the nurse suspect first?
,A. Hypovolemic shock from post-operative bleeding
B. Cardiogenic shock with left ventricular failure [CORRECT]
C. Anaphylactic reaction to dobutamine
D. Pulmonary embolism
Correct Answer: B
Rationale:
● The "Green Light" Standard: To achieve a Green Light, the nurse must synthesize
hemodynamic parameters to distinguish between types of shock and identify low
cardiac output syndrome post-CABG.
● Pathophysiological Synthesis: Post-CABG + low cardiac index (<2.5), low SvO₂
(<60%), high PAWP (>18), and dyspnea = Cardiogenic shock/LV failure. The heart
cannot pump effectively (low CI), causing pulmonary congestion (high PAWP)
and tissue hypoxia (low SvO₂).
● Risk Anticipation: Early recognition prevents multi-organ failure, cardiac arrest,
and death. This requires immediate inotropic support escalation and possible
IABP.
● Temporal Reasoning: While bleeding (A) causes low CI, it would show LOW PAWP
(empty ventricle), not HIGH. Anaphylaxis (C) would show vasodilation and
bronchospasm. PE (D) would show increased pulmonary pressures but typically
normal/low PAWP unless right heart strain occurs.
● Evidence Citation: AHA/ACC Guidelines for Management of Heart Failure (2022);
Society of Thoracic Surgeons hemodynamic monitoring standards.
● Distractor Deconstruction: Choosing A represents failure to understand
Frank-Starling mechanism—bleeding causes low preload (low PAWP), while
pump failure causes high afterload (high PAWP).
Q2 (SATA - 6 options): A nurse is managing care for a client with diabetic ketoacidosis
(DKA) who has been on an insulin drip for 6 hours. Current findings: Blood glucose 180
,mg/dL; serum potassium 3.2 mEq/L; pH 7.28; anion gap 18; urine output 35 mL/hr.
Which actions should the nurse take at this time? Select all that apply.
A. Add dextrose to the IV fluids and continue the insulin drip [CORRECT]
B. Administer IV potassium replacement per protocol [CORRECT]
C. Continue frequent neurological assessments [CORRECT]
D. Stop the insulin drip immediately
E. Increase the insulin drip rate to achieve faster glucose normalization
F. Administer sodium bicarbonate IV push
Correct Answer: A, B, C
Rationale:
● The "Green Light" Standard: Green Light nurses demonstrate mastery of DKA
resolution phases, understanding that euglycemia does not equal resolved DKA.
● Pathophysiological Synthesis: BG 180 with pH 7.28 and anion gap 18 indicates
partially corrected DKA—glucose normalized but ketoacidosis persists. Insulin
must continue to close the anion gap. Hypokalemia (3.2) is critical—insulin drives
K⁺ intracellularly, risking lethal arrhythmias.
● Risk Anticipation: Stopping insulin (D) causes rebound DKA. Increasing insulin (E)
worsens hypokalemia and causes hypoglycemia. Bicarbonate (F) is
contraindicated unless pH <6.9 (causes paradoxical CSF acidosis and
hypokalemia).
● Temporal Reasoning: DKA management requires two-bag protocol (dextrose +
insulin) to prevent hypoglycemia while continuing anion gap closure. Potassium
replacement is urgent at <3.5.
● Evidence Citation: ADA Standards of Care in Diabetes 2024; Endocrine Society
DKA Guidelines.
● Distractor Deconstruction: D represents the "glucose fixation" error—novice
nurses focus on glucose rather than acid-base status. E represents "more is
better" thinking without considering electrolyte shifts.
, Q3 (Triple Threat Scenario): A 28-week pregnant client with Type 1 diabetes presents
with fever 101.8°F, chills, and uterine tenderness. Fetal heart rate is 170 bpm.
Laboratory findings: WBC 18,000; glucose 240 mg/dL; serum bicarbonate 16 mEq/L;
positive ketones in urine. The client's blood pressure is 88/52 mmHg. Which
complication should the nurse prioritize addressing first?
A. Septic shock with metabolic acidosis [CORRECT]
B. Diabetic ketoacidosis secondary to pregnancy
C. Chorioamnionitis with fetal tachycardia
D. Preterm labor
Correct Answer: A
Rationale:
● The "Green Light" Standard: The Green Light nurse triages the maternal-fetal dyad
in complex multi-system failure, prioritizing maternal hemodynamic stability as
the foundation for fetal survival.
● Pathophysiological Synthesis: Pregnancy + diabetes + infection + hypotension
(88/52), fever, acidosis (HCO₃ 16), and fetal tachycardia = Septic shock. The low
bicarbonate indicates metabolic acidosis from tissue hypoperfusion, not just
DKA (which would show anion gap calculation needed).
● Risk Anticipation: Maternal septic shock causes placental hypoperfusion → fetal
hypoxia → fetal demise. Immediate fluid resuscitation, antibiotics, and possible
delivery are required.
● Temporal Reasoning: While chorioamnionitis (C) is the likely source,
hemodynamic collapse (A) takes precedence over the infectious diagnosis. DKA
(B) is present but secondary to the septic trigger. Preterm labor (D) is a
consequence, not the priority.
● Evidence Citation: ACOG Practice Bulletin #211: Critical Care in Pregnancy;
Surviving Sepsis Campaign Maternal Guidelines.