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How did Joseph Lister use carbolic acid to reduce infections after surgery?
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history of medicine
Edward Jenner vaccinating his child against smallpox; colored engraving.
Joseph Lister revolutionized surgery by introducing antiseptic techniques to prevent infection in surgical wounds. Influenced by Louis Pasteur’s germ theory, Lister postulated that microorganisms were responsible for sepsis and sought to create a chemical barrier to prevent them from entering operation sites.12
He utilized carbolic acid as an effective antiseptic agent to achieve this goal. His methods included:12
- Sterilizing instruments: Soaking surgical tools in carbolic acid solutions to ensure they were free of contaminants.13
- Wound treatment: Cleaning wounds directly with the solution to prevent the growth of bacteria.1
- Environmental disinfection: Using the acid to disinfect the air and the operating room environment to protect the patient.1
By interposing this antiseptic barrier between the wound and the surgeon's hands, instruments, and the surrounding air, Lister dramatically reduced surgical mortality rates. His fundamental principle—that bacteria must never gain entry into a surgical wound—remains the cornerstone of modern surgery.12