Scenario:

A 72-year-old patient with a history of diabetes and COPD presents with sepsis secondary to pneumonia. The patient was fluid resuscitated with 30 mL/kg of IV crystalloid, but remains hypotensive with a MAP of 55 despite aggressive fluids.

❓ Decision Point: Why might this patient still be hypotensive?

• What factors contribute to persistent hypotension in septic shock?

• How does sepsis affect vascular tone?

• When should vasopressors be initiated?

➡ Answer: Sepsis leads to vasodilation and capillary leak, making fluid resuscitation alone sometimes insufficient. If a MAP < 65 persists despite fluids, vasopressors are indicated.

❓ Decision Point: What medication do you expect to be ordered?

A. Phenylephrine
B. Dopamine
C. Norepinephrine
D. Epinephrine

➡ Correct Answer: C - Norepinephrine (Levophed)
🩺 Why? Norepinephrine is the first-line vasopressor for septic shock because it primarily stimulates alpha receptors, causing vasoconstriction, with mild beta-1 effects to support cardiac output.

❓ Decision Point: What if you don’t have a central line? What now?

• Can norepinephrine be given peripherally?

• Why are central lines preferred for vasopressors?

• What risks should you be aware of?

➡ Answer: Yes, norepinephrine can be started through a large-bore peripheral IV in emergencies while preparing for central line placement.
🛑 Why are central lines preferred?

• Reduces risk of extravasation & tissue necrosis

• Allows for higher concentrations and multiple infusions

• Facilitates accurate hemodynamic monitoring

If using a peripheral IV, monitor the site closely and consider phentolamine if extravasation occurs.

❓ Decision Point: Your patient’s MAP is now 60, but you are titrating norepinephrine past halfway on the protocol. What now?

• Should you keep increasing norepinephrine?

• When should you add a second vasopressor?

➡ Answer: Yes, continue titrating norepinephrine while requesting a second vasopressor.

🩺 Why ask for a second vasopressor?

• Higher doses of norepinephrine alone can cause excessive vasoconstriction, leading to ischemic complications

• Adding a second pressor helps reduce norepinephrine requirements

💊 Which vasopressor should you add and why?
➡ Answer: Vasopressin (ADH)

• Non-catecholamine vasopressor (works differently than norepinephrine)

• Helps restore vascular tone in catecholamine-resistant shock

• No direct effect on heart rate (good in tachycardic patients)

At this point, also ask for:
✅ A central line – to safely continue vasopressors
✅ An arterial line – for accurate BP monitoring

Fast Forward: The Patient Now Requires Multiple Pressors

• Norepinephrine

• Vasopressin

• Epinephrine

• Phenylephrine

• Central & arterial lines are placed

• Antibiotics, fluids, and supportive care (electrolytes, glucose, etc.) are ongoing

• MAP remains borderline at 60

❓ Final Decision Point: What else can be done?

• What other interventions might help maintain BP?

➡ Answer:
1️⃣ Stress-dose steroids (Hydrocortisone 50mg IV Q6H)

• Helps in adrenal insufficiency from sepsis

• Reduces refractory vasodilatory shock

• Improves vascular responsiveness to catecholamines

2️⃣ Sodium Bicarbonate (HCO3) – If Metabolic Acidosis Present

• Sepsis often leads to lactic acidosis

• Severe acidosis (pH < 7.2) can cause vasopressor resistance

• Correcting acidosis can improve vasopressor effectiveness

💡 Key Takeaways:

✅ Norepinephrine is the first-line vasopressor for septic shock
✅ If still hypotensive despite fluids, start a vasopressor early
✅ If norepinephrine needs to be titrated too high, add a second agent
✅ Vasopressin is often the best second-line agent in septic shock
✅ Get a central line ASAP for safe vasopressor administration
✅ Consider stress-dose steroids and bicarb in refractory cases