Researchers reviewed existing studies to understand how different anesthesia methods used during cancer surgery might affect a patient's immune system and cancer recurrence. The review looked at research involving cancer patients and compared two main approaches: total intravenous anesthesia (using a drug called propofol) with regional pain blocks, versus anesthesia using inhaled gases and strong opioid pain medications.
The review found that the intravenous propofol and regional anesthesia approach was linked to better preservation of important immune cells, like natural killer cells and T-lymphocytes, which help fight cancer. In contrast, high doses of opioid painkillers, especially morphine, were associated with a reduction in these immune cells. Some studies also suggested regional anesthesia might be linked to a lower risk of cancer coming back.
It is very important to understand that this is a review of other studies, not new proof. The findings show associations or links, not that one type of anesthesia causes better outcomes. The review did not provide detailed information on long-term survival. Patients should discuss their anesthesia plan with their surgical team, but this review does not provide a definitive answer on the best choice for everyone.