Vasoconstrictor effects of adrenaline in human septic shock

Area of Science:

• Critical Care Medicine
• Pharmacology
• Infectious Diseases

Background:

• Septic shock is a life-threatening condition characterized by dangerously low blood pressure and organ dysfunction.
• Managing septic shock requires careful titration of vasoactive medications to restore hemodynamic stability.

Purpose of the Study:

• To investigate the efficacy and safety of adrenaline as a vasoconstrictor in patients with septic shock.
• To determine optimal dosing strategies and potential adverse effects of adrenaline in this context.

Main Methods:

• An open prospective study involving ten patients with eleven episodes of septic shock.
• Adrenaline was administered when systemic vascular resistance dropped below 600 dyn.s.cm⁻⁵, titrated to a maximum of 800 dyn.s.cm⁻⁵.
• Patients received concurrent supportive therapies including antibiotics, ventilation, and nutritional support, with specific hemodynamic targets maintained.

Main Results:

• Adrenaline administration successfully increased systemic vascular resistance in patients with septic shock.
• No significant deterioration in cardiac index or increase in pulse rate was observed.
• No renal damage was demonstrated, and the mortality rate directly attributed to septic shock was low (one patient).
• Five patients were discharged from the hospital, with other deaths attributed to non-septic causes.

Conclusions:

• Adrenaline can be safely used as a vasoconstrictor in septic shock when initial doses are high and carefully titrated.
• This approach provides a therapeutic window for eradicating the underlying sepsis.
• Adrenaline offers a viable option for hemodynamic support in severe septic shock.