Sepsis & Septic Shock — NCLEX Nursing Lesson Anatomy & Physiology · RN Track · Medical-Surgical Body Systems · Hematologic / Immune System · Sepsis & Septic Shock Condition Lesson · NCLEX-PN / NCLEX-RN

When the body's response to infection turns against itself—why every minute counts, why the Hour-1 bundle saves lives, and why a rising lactate is a warning you can't ignore.

In this lesson

Lesson Objectives
Why This Matters
Disease Overview
The Sepsis Continuum
Pathophysiology
Risk Factors
Signs & Symptoms
Nursing Assessment
Diagnostic Tests
Laboratory Tests
Medications
Nursing Interventions
Complications
Patient Education
Clinical Judgment
Clinical Connections
NCLEX High-Yield
Memory Aids
Case Study
Practice Questions
Key Takeaways
References

Lesson Objectives

Differentiate infection → sepsis → septic shock along the continuum and recognize each early.
Explain the pathophysiology of sepsis as distributive shock (massive vasodilation and capillary leak) and why organs fail.
Prioritize the Surviving Sepsis "Hour-1" bundle—cultures before antibiotics, broad-spectrum antibiotics, lactate, fluids, and vasopressors—and justify each step.
Interpret key markers (lactate, MAP, WBC) and titrate care to goals (MAP ≥65, normalizing lactate/urine output).
Use the NCSBN Clinical Judgment model and answer NGN-style sepsis items.

Why This Matters

Prevalence: sepsis affects more than 1.7 million U.S. adults each year and is a leading cause of hospital death—and of readmission. It can arise from any infection (lung, urinary, abdominal, skin, bloodstream) in any setting.

Patient safety: sepsis is a time-critical emergency—like stroke and MI, "time is tissue." Mortality rises with every hour treatment is delayed. Early recognition and the rapid bundle are among the highest-impact things a nurse can do.

NCLEX importance: heavily tested on early recognition (subtle changes—confusion, tachypnea, low-grade fever, mild hypotension), the Hour-1 bundle order (cultures before antibiotics!), lactate as a perfusion marker, fluid resuscitation (30 mL/kg), norepinephrine as first-line vasopressor, and MODS/DIC complications. It integrates infection, perfusion, and shock concepts.

Why nurses encounter it constantly: nurses are the early-warning system—trending vitals and mental status, drawing cultures/lactate, starting antibiotics and fluids on time, and titrating vasopressors. Nurse vigilance directly changes survival.

Connecting to prior lessons From assessment, recall the signs of poor perfusion: altered mental status, tachycardia, tachypnea, hypotension, cool or warm skin, and low urine output. Sepsis is infection + a dysregulated body response that causes exactly this. From the immune lessons, recall that infection normally triggers a controlled response—sepsis is that response gone system-wide and harmful.

Disease Overview

Stage	Definition & meaning
Infection	Pathogens invade tissue and trigger a local immune response.
Sepsis	Life-threatening organ dysfunction caused by a dysregulated response to infection. The response becomes body-wide, injuring the patient's own organs. (Screen with qSOFA: altered mentation, RR ≥22, SBP ≤100.)
Septic shock	Sepsis with persistent hypotension requiring vasopressors to keep MAP ≥65 and a lactate >2 mmol/L despite adequate fluids—a subset with much higher mortality.
MODS	Multiple organ dysfunction syndrome—the end stage as organ after organ fails.

Sepsis is a form of distributive shock: the problem isn't the volume of blood or the pump—it's that the blood vessels dilate massively and leak, so blood is poorly distributed and tissues don't get oxygen even when the tank is "full."

Analogy — the leaky, over-relaxed hose network

Normally your circulation is a firm network of hoses at good pressure. In sepsis, chemical alarms make every hose relax wide open and spring leaks all at once. Even with the same amount of water (blood), pressure collapses and the water leaks into the yard (tissues) instead of reaching the sprinkler heads (organs). That's why the fixes are to add water fast (fluids), then tighten the hoses (vasopressors), and stop the source (antibiotics)—and why the skin can feel warm and flushed early even as organs starve.

The Sepsis Continuum & the Hour-1 Bundle

Infection → Sepsis → Septic Shock (catch it early) Increasing severity & mortality — every hour of delay costs lives INFECTION • Source: lungs, urine, abdomen, skin, blood • Fever/chills, ↑WBC • Localized signs SEPSIS • Organ dysfunction begins • Altered mental status • RR ≥22, SBP ≤100 (qSOFA) • ↑Lactate, ↓urine SEPTIC SHOCK • Hypotension despite fluids • Needs vasopressors (MAP ≥65) • Lactate >2 mmol/L • Organ failure → MODS

The earlier you catch it, the more lives are saved. Subtle cues—new confusion, fast breathing, a rising lactate—often appear before obvious hypotension.

The Surviving Sepsis "Hour-1" Bundle — start within the first hour 1 Measure lactate — marker of tissue hypoxia; remeasure if >2 to track response 2 Obtain blood cultures BEFORE antibiotics — so the pathogen isn't masked 3 Give broad-spectrum antibiotics — right after cultures; every hour of delay ↑ mortality 4 Rapid IV crystalloid 30 mL/kg for hypotension or lactate ≥4 — refill the leaky vessels 5 Vasopressors (norepinephrine 1st-line) if MAP <65 after fluids — tighten the vessels

Memorize the order and the "why." The classic NCLEX trap is giving antibiotics before drawing cultures—always culture first, then antibiotics.

Pathophysiology

Normal physiology: when infection occurs, the immune system mounts a controlled, local inflammatory response to kill pathogens while maintaining stable blood pressure and organ perfusion. ↓ What goes wrong: the response becomes dysregulated and body-wide. A flood of inflammatory mediators causes massive vasodilation, increased capillary permeability (leak), and microvascular clotting. This is distributive shock. ↓ How symptoms appear: vasodilation + leak → relative hypovolemia and hypotension; tissues can't extract oxygen → anaerobic metabolism → rising lactate; the body compensates with tachycardia and tachypnea; the brain is under-perfused → confusion; kidneys → low urine output. Early "warm shock" = warm, flushed, bounding pulses; later "cold shock" = cold, mottled, weak pulses as compensation fails. ↓ How it progresses: sustained hypoperfusion and microclots injure organ after organ → acute kidney injury, ARDS, liver dysfunction, DIC, and ultimately MODS and death. Rapid source control, antibiotics, fluids, and pressors interrupt the spiral. NCLEX Clinical Pearl — why lactate is your warning light When cells can't get enough oxygen, they switch to anaerobic metabolism, producing lactic acid. So a rising or high lactate (>2, and especially ≥4 mmol/L) means tissues are starving—an early, sensitive marker of severity and a target for treatment. A falling lactate after resuscitation means perfusion is improving.

Risk Factors

Non-modifiable	Modifiable	Preventable / reducible
Extremes of age (very young & older adults) Chronic illness (diabetes, cancer, liver/kidney disease) Immunodeficiency (HIV, asplenia)	Immunosuppressive drugs/chemo/steroids Indwelling devices (central lines, catheters, tubes) Malnutrition; poorly controlled diabetes Untreated or partially treated infections	Hand hygiene, vaccination, and infection prevention Timely treatment of infections Catheter/line care and early removal Early recognition & sepsis screening

High-risk populations: older adults, infants, immunocompromised patients (chemo, steroids, HIV, transplant), those with chronic disease or invasive devices, post-op and hospitalized patients, and anyone with a recent or untreated infection. In older adults, new confusion may be the first and only sign.

Signs & Symptoms

Category	Findings & WHY they occur
Early findings	Fever or hypothermia, chills, tachycardia, tachypnea, new confusion/restlessness, and warm/flushed skin ("warm shock")—the inflammatory response and early vasodilation with compensation. New confusion (especially in older adults) is a key early cue.
Late findings	Hypotension, cold/clammy/mottled skin ("cold shock"), weak pulses, decreased urine output, and worsening confusion/lethargy—compensation fails and perfusion collapses.
Expected findings	Signs of the source infection (cough/sputum, dysuria, wound drainage) plus systemic response (fever, ↑HR/RR, ↑WBC, ↑lactate).
Unexpected / worsening	Persistent hypotension despite fluids, rising lactate, falling urine output, and new organ dysfunction—progression to septic shock/MODS.
Emergency findings	Septic shock (hypotension needing vasopressors, lactate >2), respiratory failure/ARDS, DIC (bleeding + clotting), and MODS—life-threatening; escalate immediately.

Why "warm shock" can fool you Unlike other shocks (which cause cold, clammy skin from vasoconstriction), early septic shock causes vasoDILATION—so the skin may be warm, flushed, and pulses bounding even though the patient is critically ill. Don't be reassured by warm skin: check mental status, BP/MAP, lactate, and urine output. As it worsens, the patient turns cold and mottled ("cold shock").

Nursing Assessment

Subjective: source symptoms (cough, dysuria, wound pain, abdominal pain), fever/chills, malaise, confusion (often reported by family), and risk factors (recent infection, devices, immunosuppression).

Objective: full vital signs including temperature, HR, RR, BP/MAP, and SpO₂; mental status; skin (warm/flushed vs. cold/mottled); capillary refill; urine output; and the infection source. Trend everything—sepsis is recognized in the changes.

Priority / focused finding	Why it matters / action
Mental status change	Often the earliest sign of poor cerebral perfusion—screen and escalate.
MAP <65 / hypotension	Inadequate organ perfusion—fluids, then vasopressors.
Lactate (rising/high)	Tissue hypoperfusion severity—guides resuscitation; retrend.
Urine output <0.5 mL/kg/hr	Renal hypoperfusion/AKI—monitor hourly with a catheter.
RR ≥22, SpO₂ falling	Compensation/respiratory failure—oxygen, monitor for ARDS.

Red flags — notify / act now (activate sepsis protocol) New confusion, fever with rigors, RR ≥22, SBP ≤100/MAP <65, rising lactate, low urine output, or mottled skin. Suspected sepsis is a rapid-response/protocol trigger—don't wait for the patient to "look bad"; start the Hour-1 bundle.

Diagnostic Tests

Test	Purpose / why ordered	Findings, prep & nursing considerations
Blood cultures (×2, before antibiotics)	Identify the organism to target therapy	Draw BEFORE the first antibiotic dose (don't delay antibiotics long to do so). Use aseptic technique; label sites/times.
Cultures of suspected source (urine, sputum, wound, CSF)	Locate/confirm the infection source	Collect per site; supports source control.
Imaging (chest X-ray, CT, ultrasound)	Find the source (pneumonia, abscess, etc.)	Supports source control (drainage/removal). Contrast precautions where used.
Vital signs/qSOFA & sepsis screen	Detect organ dysfunction early	Altered mentation, RR ≥22, SBP ≤100 flags high risk—triggers workup.
ECG/hemodynamic monitoring	Assess perfusion/response in severe cases	Guides fluids/pressors in the ICU.

Patient teaching — during workup Explain that blood cultures and labs help find and target the infection and that antibiotics and fluids will be started quickly because early treatment saves organs. Reassure the anxious patient/family while acting fast.

Laboratory Tests

Lab	Normal range	Significance & trend
Serum lactate	<2 mmol/L	>2 = hypoperfusion; ≥4 = severe. Central to diagnosis and resuscitation—re-measure to confirm it is falling with treatment (a rising lactate is ominous).
WBC	5,000–10,000/µL	High (infection) or low (overwhelming sepsis); bands ("left shift") suggest acute infection.
Blood cultures	No growth	Positive identifies the organism → narrow antibiotics. Draw before antibiotics.
Procalcitonin / CRP	Low	Rise with bacterial infection; can help guide/deescalate antibiotics.
Creatinine / BUN, liver enzymes, bilirubin	Cr 0.6–1.2 mg/dL	Rising = organ dysfunction (kidney/liver)—part of defining sepsis/MODS.
Platelets, PT/INR, aPTT, fibrinogen, D-dimer	Platelets 150–400k; INR ~1	DIC: falling platelets/fibrinogen, rising PT/INR and D-dimer—bleeding and clotting at once.
ABG	pH 7.35–7.45	Metabolic acidosis (from lactate) ± respiratory compensation; hypoxemia in ARDS.

NCLEX pearl — lactate and MAP are your goals Treatment aims to restore perfusion: target MAP ≥65 mmHg and a normalizing lactate, with urine output ≥0.5 mL/kg/hr. A falling lactate and improving urine/MAP mean the plan is working; a rising lactate means escalate.

Medications

Antimicrobials (treat the cause)

Class / examples	Mechanism, use & key nursing/NCLEX points
Broad-spectrum antibiotics (e.g., piperacillin-tazobactam, vancomycin, cefepime, carbapenems)	Kill the likely pathogens immediately, then de-escalate when cultures return. Give within the first hour, AFTER cultures. Monitor for allergies; check renal function and drug levels (e.g., vancomycin trough); watch for superinfection (C. difficile).
Antifungals/antivirals (if indicated)	For fungal/viral sources in specific patients.	Used when the source warrants.

Hemodynamic support

Drug	Why given & nursing
IV crystalloids — normal saline or lactated Ringer's	First-line for hypotension/high lactate: 30 mL/kg rapidly to refill the dilated, leaky vasculature. Reassess perfusion/fluid tolerance (lungs) frequently.
Norepinephrine (Levophed) — first-line vasopressor	Vasoconstricts to raise MAP when fluids alone don't reach MAP ≥65. Give via central line when possible (extravasation causes tissue necrosis); titrate to MAP; continuous BP monitoring. Vasopressin may be added; epinephrine is an alternative.
Corticosteroids — hydrocortisone	Considered in refractory septic shock (still hypotensive on fluids + pressors) to support vascular tone. Monitor glucose/infection.
Insulin (as needed)	Control stress hyperglycemia to a moderate target—avoid hypoglycemia.
VTE & stress-ulcer prophylaxis	Prevent clots and GI bleeding in critically ill patients.

Safety — vasopressors & the antibiotic timing rule Norepinephrine is a high-alert drug: give through a central line if possible, monitor BP/MAP continuously, titrate carefully, and watch the site for extravasation (necrosis). Always draw cultures before starting antibiotics—but do not delay antibiotics unduly to obtain them. Verify allergies and check renal dosing/levels. NCLEX testing points Order: cultures → antibiotics (within 1 hr) → 30 mL/kg fluids → norepinephrine if MAP <65. Norepinephrine is first-line pressor (central line). Target MAP ≥65, normalizing lactate, urine ≥0.5 mL/kg/hr. Hydrocortisone for refractory shock.

Nursing Interventions

Priority	Intervention & WHY
Airway/Breathing	Give oxygen and monitor SpO₂/respiratory status; support ventilation for respiratory failure/ARDS—sepsis increases oxygen demand and can flood the lungs.
Circulation (core priority)	Establish large-bore IV access, give rapid crystalloids (30 mL/kg), then titrate norepinephrine to MAP ≥65; monitor BP/MAP, lactate, and urine output—restore perfusion.
Treat the source (time-critical)	Draw cultures, then give antibiotics within the first hour, and support source control (drain abscess, remove infected line/catheter)—kill the cause and stop the trigger.
Monitor & trend	Frequent VS, mental status, hourly urine output, lactate, and organ labs—early detection of deterioration or improvement.
Safety	Infection prevention (hand hygiene, line/catheter care), high-alert drug safety (pressors), glucose control, and VTE/stress-ulcer prophylaxis.
Comfort	Temperature management, positioning, reassurance, and family support—critical illness is frightening.
Patient/family education	Explain the plan and the urgency; after recovery, teach infection prevention and recognizing early warning signs.
Interdisciplinary	Rapid response/intensivist, infectious disease, pharmacy, respiratory therapy, and the sepsis team—bundle care depends on the whole team.

Why fluids first, then pressors In distributive shock the vessels are dilated and leaky, so there's a relative volume deficit—fluids refill the tank first. Only when adequate fluid hasn't restored MAP do you add norepinephrine to tighten the vessels. Giving pressors into an empty tank squeezes vessels without enough volume to circulate—so the sequence matters.

Potential Complications

Complication	Early signs	Nursing response
Septic shock	Hypotension unresponsive to fluids, rising lactate, mottling	Emergency: vasopressors to MAP ≥65, continue bundle, ICU, monitor perfusion.
ARDS / respiratory failure	Worsening dyspnea, hypoxemia, bilateral infiltrates	Oxygen, prepare for mechanical ventilation, lung-protective care.
Acute kidney injury	Falling urine output, rising creatinine	Optimize perfusion/fluids, monitor labs, possible dialysis.
DIC	Bleeding + clotting, ↓platelets/fibrinogen, ↑D-dimer/PT	Monitor labs, transfuse products as ordered, treat underlying sepsis.
MODS	Sequential organ failures	Aggressive support of each system; often ICU/end-of-life discussions.
Metabolic acidosis	Low pH, high lactate, compensatory tachypnea	Restore perfusion (treats the cause), monitor ABGs.

Patient Education

Disease process: explain that sepsis is the body's extreme, harmful response to an infection that can injure organs, and that fast treatment saves lives. Prevention (before and after): practice hand hygiene, keep up with recommended vaccines (e.g., influenza, pneumococcal), care for wounds and manage chronic conditions (especially diabetes), and treat infections early—don't ignore worsening symptoms. Device/line care: keep catheters/lines clean and have them removed as soon as possible. Medication adherence: finish prescribed antibiotic courses and take chronic-disease medications as directed. Recovery (post-sepsis): teach that weakness, fatigue, and "brain fog" (post-sepsis syndrome) are common and improve with time and rehab; encourage gradual activity, nutrition, and follow-up. Follow-up: keep appointments and complete labs. Warning signs / when to seek emergency care (teach the acronym below): signs of a serious infection—new confusion, extreme fatigue/feeling "the worst ever," fast breathing or breathlessness, fever/shivering or feeling very cold, clammy or mottled skin, and little/no urine—seek emergency care and say, "I am worried about sepsis."

Clinical Judgment (NCSBN Model)

Recognize cues: an older adult admitted with a UTI becomes newly confused; vitals: T 38.9 °C, HR 116, RR 26, BP 92/54 (MAP 67), SpO₂ 93%, skin warm and flushed, urine output decreasing. Lactate 3.4.
Analyze cues: infection (UTI) + organ dysfunction (new confusion, tachypnea, borderline BP, ↓urine) + high lactate = sepsis with early ("warm") shock physiology—at risk of progressing to septic shock.
Prioritize hypotheses: sepsis with hypoperfusion—perfusion and source control are the priority; time-critical.
Generate solutions: activate the sepsis protocol/rapid response: measure lactate, draw blood cultures, give broad-spectrum antibiotics within 1 hour, start 30 mL/kg IV crystalloid, oxygen, large-bore access, hourly urine output, and prepare norepinephrine if MAP stays <65 after fluids.
Take action: cultures then antibiotics, rapid fluids, oxygen, continuous monitoring, and escalate to the team.
Evaluate outcomes: is the MAP ≥65, lactate falling, urine output improving, mental status clearing? If not, escalate (vasopressors, ICU). Then teach prevention and recognize post-sepsis recovery needs.

Clinical Connections — types of shock (commonly confused)

	Septic (distributive)	Hypovolemic	Cardiogenic	Anaphylactic (distributive)
Cause	Infection → vasodilation/leak	Blood/fluid loss	Pump failure (MI/HF)	Allergic vasodilation
Skin	Early warm/flushed; later cold/mottled	Cold, clammy, pale	Cold, clammy	Warm/flushed + hives/swelling
Key clue	Fever, ↑lactate, source of infection	Low volume, dry, bleeding	Pulmonary edema, ↓EF	Airway swelling after allergen
Treatment	Cultures→antibiotics, fluids, norepinephrine	Replace volume/blood; stop loss	Improve pump; careful fluids	IM epinephrine + airway
Priority nursing	Perfusion + source control + bundle	Volume + control bleeding	Support cardiac output	Airway first

Also distinguish sepsis (dysregulated response to infection) from a simple/local infection (no organ dysfunction) and from SIRS without infection (e.g., pancreatitis, trauma). The differentiator is infection + organ dysfunction.

NCLEX High-Yield Review

What the NCLEX Wants You to Know

Cultures BEFORE antibiotics — then antibiotics within 1 hour The #1 tested order.
Fluids first (30 mL/kg), then norepinephrine for MAP <65
Lactate = perfusion marker; goal is falling lactate
New confusion may be the earliest sign (esp. older adults)
Early "warm shock" — warm skin doesn't mean stable

Frequently tested findings: new confusion, tachypnea, fever/hypothermia, warm-then-cold skin, hypotension/MAP <65, high lactate, low urine output. Common distractors: giving antibiotics before cultures, starting vasopressors before fluids, being reassured by warm skin, and delaying the bundle to "watch." Priority interventions: the Hour-1 bundle—lactate, cultures, antibiotics, fluids, pressors—plus oxygen and monitoring. Expected vs unexpected: fever/↑WBC/↑HR/RR are expected in infection; new organ dysfunction, persistent hypotension, and rising lactate are emergencies. Patient teaching: infection prevention, vaccines, early treatment, and post-sepsis recovery. Safety: high-alert vasopressors (central line, extravasation), antibiotic allergies/renal dosing, and infection control. Delegation: RN assesses, interprets labs, gives antibiotics/pressors, and titrates; UAP can obtain vitals, measure I&O, and report—not assess or medicate. Frequently tested meds: broad-spectrum antibiotics, crystalloids, norepinephrine, vasopressin, hydrocortisone. Critical labs: lactate, WBC, cultures, creatinine, platelets/coags. Most common mistakes: antibiotic-before-culture, pressor-before-fluid, and missing subtle early sepsis.

Memory Aids

Hour-1 bundle "Culture, Fluids, Antibiotics, Lactate, Pressors": think "Cultures First, Antibiotics Late? No—Fast." Order: lactate + cultures → antibiotics → fluids → pressors.
Always: "Culture before you cover" — draw cultures before giving antibiotics.
qSOFA (quick screen): Confusion, RR ≥22, SBP ≤100 ("Can't think, breathing fast, pressure low").
Warm vs. cold shock: "Sepsis starts WARM (dilated), then goes COLD (crashing)."
Goals "65-2-0.5": MAP ≥65, lactate falling toward <2, urine ≥0.5 mL/kg/hr.
Norepinephrine = "Number one" pressor for septic shock (via central line).
Sepsis warning "TIME": Temperature change, Infection, Mental decline, Extremely ill/short of breath.

Case Study — from admission to discharge

Admission. Mr. Osei, 72, is admitted from home with a productive cough and fever. Overnight he becomes confused and restless. Vitals: T 39.1 °C, HR 118, RR 28, BP 88/50 (MAP 63), SpO₂ 90%; skin warm and flushed; urine output low. Lactate is 4.2; WBC 19,000 with bands.

Step 1–2: Recognize & analyze cues

Cues: pneumonia (source) + new confusion, tachypnea, hypotension (MAP 63), hypoxia, low urine, lactate 4.2 = sepsis progressing to septic shock (distributive; early "warm" skin). Time-critical.

Step 3–4: Prioritize & plan

Priority: restore perfusion and treat the source now. Plan (Hour-1 bundle): measure lactate, draw blood cultures, give broad-spectrum antibiotics within 1 hr, start 30 mL/kg IV crystalloid, oxygen, large-bore IV access, hourly urine output, and prepare norepinephrine if MAP stays <65 after fluids.

Step 5: Take action

The nurse activates the sepsis protocol/rapid response, draws cultures and lactate, ensures antibiotics are hung promptly, gives rapid fluids while watching lung sounds/oxygenation, applies oxygen, and monitors MAP, mentation, and urine. MAP remains 60 after fluids, so norepinephrine is titrated to MAP ≥65 via central access.

Step 6: Evaluate & discharge

MAP reaches 70, lactate falls to 1.8, urine output improves, and confusion clears. Cultures allow antibiotic de-escalation. Discharge teaching: complete the antibiotic course, hand hygiene and vaccines (flu/pneumococcal), treat infections early, expect some post-sepsis fatigue/weakness with gradual recovery, keep follow-up, and seek emergency care for warning signs (confusion, fever/chills, fast breathing, low urine)—"I'm worried about sepsis."

NCLEX Practice Questions

Answer choices are numbered; the correct answer is given as a number.

1. A client with suspected sepsis is prescribed blood cultures and IV antibiotics. Which action should the nurse take first?

Administer the antibiotic immediately, then draw cultures
Give a dose of acetaminophen for the fever
Wait for the culture results before giving anything
Obtain the blood cultures, then start the antibiotic

Rationale

Answer: 4. Draw cultures before antibiotics so the organism isn't masked—then give antibiotics promptly (within the hour). Giving antibiotics first (1) can invalidate cultures, antipyretics (2) don't address perfusion, and waiting for results (3) dangerously delays treatment.

2. A nurse is monitoring a client in septic shock. Which finding indicates that treatment is improving perfusion?

A serum lactate that decreases from 4.2 to 1.8 mmol/L
A mean arterial pressure (MAP) of 55 mmHg
Urine output of 10 mL over 2 hours
Increasing confusion and mottled skin

Rationale

Answer: 1. A falling lactate shows tissues are getting oxygen again—perfusion is improving. A MAP of 55 (2), very low urine output (3), and worsening confusion/mottling (4) all indicate ongoing or worsening hypoperfusion.

3. A client with septic shock remains hypotensive with a MAP of 58 mmHg after receiving 30 mL/kg of IV crystalloid. Which order should the nurse anticipate?

Administer a diuretic to increase urine output
Restrict all IV fluids
Begin a norepinephrine infusion titrated to MAP ≥65
Give an antipyretic and recheck in one hour

Rationale

Answer: 3. When fluids don't restore a MAP ≥65, norepinephrine (first-line vasopressor) is titrated to raise MAP. A diuretic (1) and fluid restriction (2) worsen hypoperfusion, and an antipyretic with waiting (4) delays needed treatment.

4. An older adult admitted with a urinary tract infection becomes newly confused with a temperature of 38.9 °C, RR 26, and BP 94/56. What should the nurse recognize?

This is an expected part of aging
These findings suggest sepsis and require immediate action
The client is simply dehydrated and needs oral fluids
The confusion is unrelated to the infection

Rationale

Answer: 2. Infection + new confusion, tachypnea, and borderline hypotension = sepsis; new confusion is often the earliest sign in older adults. It is not normal aging (1), not simply dehydration (3), and is directly related to the infection (4).

5. The nurse is preparing to administer norepinephrine to a client in septic shock. Which nursing consideration is most important?

Give it as a rapid IV push
Mix it in the same line as antibiotics
Withhold it until the client is normotensive
Administer it through a central line and continuously monitor blood pressure/MAP

Rationale

Answer: 4. Norepinephrine is a high-alert vasopressor—give via a central line when possible (extravasation causes necrosis) and titrate to MAP with continuous BP monitoring. It is not pushed (1), not casually co-administered (2), and is given precisely because the client is hypotensive (3).

6. SATA. Which findings indicate a client's infection is progressing to sepsis? Select all that apply.

New-onset confusion
Respiratory rate of 26/min
A serum lactate of 3.5 mmol/L
Blood pressure 90/52 with decreasing urine output
A localized wound with no systemic symptoms

Rationale

Answers: 1, 2, 3, 4. Confusion, tachypnea, elevated lactate, and hypotension with low urine output reflect organ dysfunction—sepsis. A localized wound without systemic signs (5) is infection alone, not sepsis.

7. SATA. Which interventions are part of the initial sepsis bundle? Select all that apply.

Measure serum lactate
Obtain blood cultures before antibiotics
Administer broad-spectrum antibiotics within the first hour
Give 30 mL/kg IV crystalloid for hypotension or lactate ≥4
Delay antibiotics until sensitivities return

Rationale

Answers: 1, 2, 3, 4. Lactate, cultures-before-antibiotics, early broad-spectrum antibiotics, and rapid crystalloids are core bundle elements. Delaying antibiotics for sensitivities (5) increases mortality—give empiric antibiotics now.

8. Priority. A nurse is caring for four clients. Which client should the nurse assess first?

A client with a stable wound infection awaiting a dressing change
A client with pneumonia who is newly confused with a BP of 86/48 and RR 28
A client with a UTI requesting more oral fluids
A client with cellulitis whose redness is improving

Rationale

Answer: 2. New confusion with hypotension and tachypnea in a client with pneumonia indicates sepsis/septic shock—a time-critical emergency and the priority. The others are stable.

9. Delegation. Which task can the RN appropriately delegate to unlicensed assistive personnel (UAP) for a client being treated for sepsis?

Obtaining frequent vital signs and measuring hourly urine output, then reporting them
Titrating the norepinephrine infusion
Interpreting the client's lactate trend
Administering the IV antibiotic

Rationale

Answer: 1. Obtaining vital signs and measuring/ reporting I&O are within UAP scope and support monitoring. Titrating vasopressors (2), interpreting labs (3), and giving IV medications (4) require the licensed nurse.

10. NGN Case Study. A 68-year-old post-op client (bowel surgery) develops T 39.2 °C, HR 122, RR 30, BP 84/48 (MAP 60), SpO₂ 89%, new confusion, and mottled skin. Lactate is 5.1; urine output has dropped. The nurse suspects an abdominal source.

a) What is happening and which cues support it?
b) What are the priority nursing actions?

Model answer

a) What's happening: sepsis progressing to septic shock from a likely abdominal source. Supporting cues: fever, tachycardia/tachypnea, hypotension (MAP 60), hypoxia, new confusion, mottled skin (now "cold shock"), lactate 5.1, and falling urine output = organ hypoperfusion.

b) Priority actions: 1) activate the sepsis protocol/rapid response. 2) Hour-1 bundle: measure lactate, draw blood cultures, then give broad-spectrum antibiotics within 1 hour, start 30 mL/kg IV crystalloid, apply oxygen, and ensure large-bore access. 3) If MAP stays <65 after fluids → norepinephrine titrated to MAP ≥65 (central line). 4) Support source control (imaging/surgical evaluation for the abdominal source), monitor hourly urine, mentation, and lactate. Evaluate: MAP ≥65, falling lactate, improving urine/mentation; escalate to ICU if not improving.

Key Takeaways

Sepsis = infection + a dysregulated, body-wide response causing organ dysfunction; septic shock = hypotension needing vasopressors (MAP ≥65) with lactate >2. It is distributive shock (vasodilation + leak).
It's a time-critical emergency—catch it early; new confusion, tachypnea, and rising lactate often precede obvious hypotension.
Hour-1 bundle order: lactate → blood cultures → antibiotics (within 1 hr) → 30 mL/kg fluids → norepinephrine if MAP <65. Always cultures before antibiotics.
Fluids first, then pressors; norepinephrine is first-line (central line, titrate to MAP ≥65).
Goals: MAP ≥65, falling lactate, urine ≥0.5 mL/kg/hr. Watch for ARDS, AKI, DIC, and MODS.
Early septic shock can be warm and flushed—don't be fooled; trend mental status, MAP, lactate, and urine.
Prevent with hand hygiene, vaccines, early infection treatment, and line/catheter care; teach post-sepsis recovery and warning signs.

References

Hinkle, J. L., Cheever, K. H., & Overbaugh, K. J. (2022). Brunner & Suddarth's textbook of medical-surgical nursing (15th ed.). Wolters Kluwer/Lippincott.
Ignatavicius, D. D., Workman, M. L., Rebar, C. R., & Heimgartner, N. M. (2021). Medical-surgical nursing: Concepts for interprofessional collaborative care (10th ed.). Elsevier.
Silvestri, L. A., & Silvestri, A. E. (2023). Saunders comprehensive review for the NCLEX-RN examination (9th ed.). Elsevier.
Assessment Technologies Institute. (2023). ATI RN adult medical-surgical nursing review module (12th ed.). ATI Nursing Education.
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Centers for Disease Control and Prevention. (2024). Sepsis. U.S. Department of Health and Human Services. https://www.cdc.gov/sepsis

Sepsis & Septic Shock

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Welcome & Getting Started

Launch RN Simulator

Wellness Center

Nursing Foundations

Fundamentals & Safety

Pharmacology

Dosage Calculations

Leadership, Management & Delegation

Medical-Surgical Body Systems

Neurological System

Sensory System

Endocrine System

Respiratory System

Cardiovascular System

Hematologic/Immune/Lymphatic System

Gastrointestinal (GI) System

Renal & Genitourinary

Reproductive System

Musculoskeletal System

Integumentary System

Specialty Areas

Maternity

Infectious Diseases

Pediatrics

Mental Health

NCLEX Success Center

Clinical Judgment Practice

Prioritization Practice

Delegation Practice

Lab Values

Final Review