NGN Case Study 1: Managing a Patient with Sepsis

Sepsis remains one of the leading causes of morbidity and mortality in hospitalized patients. The ability to rapidly recognize, analyze, and respond to sepsis is a critical nursing competency -- and a high-yield topic on the NCLEX. This NGN case study walks you through a complete patient scenario using the Clinical Judgment Measurement Model (CJMM), demonstrating the six cognitive skills you need to master for the Next Generation NCLEX.

As you work through this case, pay attention to how each step builds on the previous one. On the actual NCLEX, unfolding case studies present new information at each stage, requiring you to integrate data progressively rather than seeing the full picture at once.

Patient Presentation

Clinical Scenario

Patient: Margaret Chen, a 68-year-old female, presents to the emergency department via ambulance. She was found by her daughter at home, confused and lethargic. The daughter reports that Mrs. Chen has been complaining of urinary frequency, urgency, and burning for the past 3 days but refused to see a doctor. Today, she became increasingly disoriented and was unable to get out of bed.

Medical History: Type 2 diabetes mellitus (managed with metformin 1000 mg BID and glipizide 5 mg daily), hypertension (lisinopril 20 mg daily), osteoarthritis, recurrent UTIs (3 episodes in the past year). She has a known allergy to sulfonamide antibiotics (rash).

Social History: Lives alone in a single-story home. Independent with ADLs at baseline. Alert and oriented x4 at baseline. Daughter visits twice weekly.

Assessment Data

Vital Signs on Arrival

Temperature

102.8°F (39.3°C)

Heart Rate

118 bpm

Blood Pressure

88/56 mmHg

Respiratory Rate

26 breaths/min

SpO2

91% on room air

Laboratory Results

WBC	18,200/mcL (elevated)
Lactate	4.2 mmol/L (elevated)
Procalcitonin	8.5 ng/mL (elevated)
BUN	32 mg/dL (elevated)
Creatinine	1.8 mg/dL (elevated)
Platelet Count	98,000/mcL (low)
Blood Glucose	186 mg/dL (elevated)
Urinalysis	Positive nitrites, positive leukocyte esterase, many bacteria

Physical Assessment Findings

Oriented to person only; confused about place, time, and situation
Skin warm, flushed, and dry
Mucous membranes dry
Suprapubic tenderness on palpation
Bilateral costovertebral angle tenderness
Capillary refill 4 seconds
Urine output: 20 mL dark amber urine obtained via straight catheterization
Lung sounds: clear bilateral, but increased work of breathing

Step 1: Recognize Cues

CJMM Skill: Recognize Cues

The first step in clinical judgment is identifying relevant data that signals a clinical problem. For this patient, the critical cues include:

Fever (102.8°F): Indicates an active infectious process. In elderly patients, even a moderate fever can signify serious infection, as older adults often mount a blunted febrile response.
Tachycardia (118 bpm): The heart rate exceeds 90 bpm, meeting one of the SIRS criteria. This compensatory response reflects the body's attempt to maintain cardiac output in the face of vasodilation and potential hypovolemia.
Hypotension (88/56 mmHg): Significantly below normal, suggesting hemodynamic compromise. This is a hallmark of sepsis-induced distributive shock.
Tachypnea (26 breaths/min): Respiratory rate above 20 is another SIRS criterion. The body is attempting to compensate for metabolic acidosis through respiratory alkalosis.
Altered mental status: Confusion in a previously alert and oriented patient is a red flag for sepsis, particularly in elderly patients where altered sensorium may be the first sign.
Elevated WBC (18,200): Leukocytosis indicates the immune system is actively fighting infection.
Elevated lactate (4.2 mmol/L): A lactate above 2 mmol/L indicates tissue hypoperfusion. Above 4 mmol/L is associated with severe sepsis and increased mortality.
Positive urinalysis: Confirms the source of infection as the urinary tract.
Oliguria (20 mL): Decreased urine output reflects renal hypoperfusion, a sign of end-organ dysfunction.

On the NCLEX, a Recognize Cues item might present this data as a highlight question, asking you to select the findings from the clinical narrative that require immediate follow-up. The key is distinguishing between findings that are clinically significant (the cues listed above) and those that are expected or benign (such as osteoarthritis history or the specific medication doses for her chronic conditions).

Step 2: Analyze Cues

CJMM Skill: Analyze Cues

Now we interpret what the recognized cues mean together. Analysis involves connecting individual findings to form a clinical picture:

SIRS criteria met: Mrs. Chen meets all four Systemic Inflammatory Response Syndrome criteria -- temperature above 38°C, heart rate above 90 bpm, respiratory rate above 20, and WBC above 12,000. While SIRS alone is not diagnostic, meeting all four criteria in the presence of a confirmed infection is highly significant.
Sepsis confirmed: SIRS criteria plus a confirmed source of infection (UTI) equals sepsis. The elevated procalcitonin (8.5 ng/mL) further supports a bacterial infectious etiology.
Evidence of organ dysfunction: The elevated creatinine (1.8 mg/dL), oliguria, thrombocytopenia (platelets 98,000), and altered mental status indicate that sepsis is progressing to severe sepsis with multi-organ dysfunction.
Septic shock likely: Hypotension (MAP approximately 67 mmHg) with elevated lactate (4.2 mmol/L) suggests septic shock -- the body's compensatory mechanisms are failing.
Risk factor analysis: Mrs. Chen's age (68), diabetes (impaired immune function), history of recurrent UTIs, and living alone (delayed treatment-seeking) all compound her risk for rapid sepsis progression.

Step 3: Prioritize Hypotheses

CJMM Skill: Prioritize Hypotheses

Ranking possible explanations from most to least likely -- and most to least urgent:

Sepsis / Septic Shock secondary to UTI (HIGHEST PRIORITY): The combination of confirmed urinary infection, SIRS criteria, hypotension, elevated lactate, and end-organ dysfunction strongly supports this as the primary diagnosis. This is life-threatening and requires immediate intervention.
Urosepsis with pyelonephritis: Bilateral CVA tenderness suggests the infection has ascended from the lower urinary tract to the kidneys. This is consistent with the severity of the presentation and does not change the immediate management priorities but informs antibiotic selection.
Acute kidney injury: Elevated BUN and creatinine with oliguria indicate AKI, likely pre-renal from sepsis-induced hypoperfusion. This is a complication of sepsis rather than a separate diagnosis.
Dehydration contributing to altered mental status: While dehydration (dry mucous membranes, poor capillary refill) contributes to the clinical picture, it is secondary to the sepsis-driven hemodynamic instability.
Diabetic emergency (less likely): Blood glucose of 186 mg/dL is elevated but not in DKA or HHS range. Diabetes is a contributing risk factor rather than the primary problem.

Step 4: Generate Solutions

CJMM Skill: Generate Solutions

Based on the confirmed sepsis diagnosis, the nurse must identify evidence-based interventions. The Surviving Sepsis Campaign guidelines form the basis for the Sepsis Bundle:

Obtain blood cultures (x2 sets): Before administering antibiotics to avoid compromising culture results. Cultures from two different sites improve pathogen identification.
Administer broad-spectrum IV antibiotics: Within 1 hour of sepsis recognition. Given Mrs. Chen's sulfonamide allergy, consider alternatives such as ceftriaxone or a fluoroquinolone (noting renal function) plus coverage for resistant organisms.
IV fluid resuscitation: 30 mL/kg crystalloid (typically normal saline or lactated Ringer's) within the first 3 hours. For a 70 kg patient, this is approximately 2,100 mL.
Measure serum lactate: Already obtained (4.2 mmol/L). Re-measure in 2-4 hours to assess response to treatment. Lactate clearance is a key indicator of treatment effectiveness.
Vasopressor support: If hypotension persists after adequate fluid resuscitation, initiate norepinephrine to maintain MAP at or above 65 mmHg.
Insert indwelling urinary catheter: For strict intake and output monitoring. Target urine output of 0.5 mL/kg/hour.
Continuous monitoring: Cardiac monitoring, pulse oximetry, frequent vital signs (every 15 minutes initially), and hourly urine output measurement.
Blood glucose management: Monitor blood glucose every 1-2 hours. Target range 140-180 mg/dL per ICU protocols. Hold metformin due to risk of lactic acidosis with renal dysfunction.

Step 5: Take Action

CJMM Skill: Take Action

Implementing the Sepsis Bundle in the correct sequence is critical. Here is the prioritized action sequence:

Ensure airway patency and apply supplemental oxygen -- SpO2 of 91% requires immediate intervention. Apply high-flow nasal cannula or non-rebreather mask targeting SpO2 above 94%.
Establish large-bore IV access (two sites) -- 18-gauge or larger for rapid fluid administration and medication delivery.
Draw blood cultures from two separate sites -- Must be obtained before antibiotics but should not delay antibiotic administration beyond 1 hour.
Initiate IV fluid resuscitation -- Begin 30 mL/kg crystalloid bolus. Run wide open initially while monitoring for signs of fluid overload.
Administer IV antibiotics -- Within 1 hour of sepsis recognition. Verify allergy (sulfonamide) and renal dose adjustment. Administer ceftriaxone 2g IV as ordered.
Insert indwelling urinary catheter -- For strict I&O monitoring and ongoing urine culture.
Initiate continuous cardiac monitoring -- Telemetry for dysrhythmia detection and hemodynamic trending.
Notify provider of findings and interventions -- Use SBAR format. Communicate the sepsis diagnosis, current vital signs, interventions initiated, and request for ICU transfer.
Hold home medications -- Discontinue metformin (lactic acidosis risk with AKI) and lisinopril (hypotension). Continue to monitor blood glucose.
Document thoroughly -- Time of sepsis recognition, all interventions with times, vital sign trends, and provider notifications.

Common Mistake: Delaying Antibiotics for Cultures

While blood cultures should ideally be drawn before antibiotics, do not delay antibiotic administration beyond 1 hour to obtain cultures. In septic shock, every hour of delayed antibiotics increases mortality by approximately 7.6%. If cultures cannot be obtained quickly, start antibiotics and draw cultures as soon as possible afterward. On the NCLEX, the correct priority is always life-preserving interventions first.

Step 6: Evaluate Outcomes

CJMM Skill: Evaluate Outcomes

After implementing the Sepsis Bundle, reassess the patient to determine treatment effectiveness:

Vital signs at 1 hour post-intervention: Are heart rate and blood pressure trending toward normal? Is SpO2 improving on supplemental oxygen? A MAP above 65 mmHg indicates adequate perfusion is being restored.
Urine output monitoring: Is urine output increasing above 0.5 mL/kg/hour? Improved output indicates restored renal perfusion. Color should lighten from dark amber.
Mental status reassessment: Is the patient becoming more oriented? Improvement in mental status is one of the earliest signs that cerebral perfusion is improving.
Repeat lactate at 2-4 hours: A 10% or greater decrease in lactate indicates positive response to treatment. Failure to clear lactate suggests ongoing tissue hypoperfusion and may require vasopressor escalation.
Fluid balance assessment: Monitor for signs of fluid overload (crackles, jugular venous distention, peripheral edema) while ensuring adequate resuscitation. This balance is critical in elderly patients and those with cardiac history.
Reassess need for vasopressors: If hypotension persists after 30 mL/kg of crystalloid, vasopressor initiation is indicated. Norepinephrine is the first-line agent for septic shock.

NCLEX Testing Strategies for Sepsis Cases

Key Points for Exam Success

Know SIRS criteria cold: Temperature above 38°C or below 36°C, HR above 90, RR above 20, WBC above 12,000 or below 4,000. You will need to recognize these quickly.
Lactate is your severity marker: Above 2 mmol/L indicates tissue hypoperfusion. Above 4 mmol/L indicates severe sepsis. Lactate clearance tracks treatment response.
Time-sensitive interventions: Blood cultures and antibiotics within 1 hour. Fluid bolus within 3 hours. These are the Sepsis Bundle targets.
Allergies matter in antibiotic selection: The NCLEX frequently tests your ability to consider allergies when choosing appropriate antibiotics. Always verify allergy status before administration.
Elderly patients present atypically: Confusion may be the first and primary sign of sepsis in older adults, even before fever develops. Do not dismiss altered mental status as "normal aging."
Hold nephrotoxic and hypotension-causing medications: In acute illness, review the medication list for drugs that should be held (metformin with AKI, ACE inhibitors with hypotension).

Common Mistakes on Sepsis Questions

Focusing on the UTI symptoms (urgency, frequency) while missing the systemic signs of sepsis.
Choosing oral antibiotics instead of IV -- in sepsis, IV administration ensures rapid therapeutic levels.
Prioritizing diagnostic tests (CT scan, additional labs) over life-saving interventions (fluids, antibiotics).
Forgetting to check allergies before selecting antibiotic therapy.
Not holding metformin in the setting of acute kidney injury and lactic acidosis.
Choosing norepinephrine before completing the fluid bolus -- vasopressors are second-line after adequate fluid resuscitation.

Practice Sepsis Case Studies with Adaptive Feedback

Our NGN case studies walk you through real clinical scenarios with CJMM-mapped questions. Get detailed scoring and rationale for every step of your clinical judgment.

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