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The Effect of Minimal Flow Anesthesia on Oxidative and Neuroendocrine Stress Response
Sponsor: Bezmialem Vakif University
Summary
Patients under general anesthesia who are unconscious and have stopped spontaneous breathing are actively ventilated with anesthesia machines, ensuring the anesthesia gas reaches the lungs and then the bloodstream. Not all the gas reaching the lungs during respiration is used; a small portion is absorbed by the body, and most of it is expelled during exhalation. After eliminating the carbon dioxide in the expired gas, it is more suitable to re-breathe the remaining gas. The portion taken by the patient needs to be provided for the next breath, and this added gas is called "fresh gas flow." Today, low flow anesthesia is defined when the fresh gas flow rate is 0.5-1 L/min, minimal flow anesthesia when it is 0.25-0.5 L/min, and metabolic flow anesthesia when it is 0.25 L/min. Our study will evaluate the effects of minimal flow anesthesia, which is widely used today due to its advantages, on oxidative stress and neuroendocrine stress response
Key Details
Gender
All
Age Range
18 Years - 65 Years
Study Type
INTERVENTIONAL
Enrollment
2
Start Date
2024-06-30
Completion Date
2024-12
Last Updated
2024-09-25
Healthy Volunteers
No
Interventions
The minimal flow anesthesia with sevoflurane group
In the minimal flow group, anesthesia will be maintained with minimal fresh gas flow (0.3-0.5 L/min). The effect of minimal flow anesthesia on oxidative and neuroendocrine stress response will be evaluated by the levels of: IL-6 (proinflammatory cytokine), ACTH (adrenocorticotropic hormone), Cortisol, TAS/TOS (total antioxidant/oxidant status) measured from blood samples. Blood samples will be taken from the antecubital area before the surgery begins, thus eliminating the need for repeated invasive procedures. Blood samples will be taken from the patients just before the surgery begins, at the end of the surgery, and at the 6th and 18th hours after the surgery.
The high flow anesthesia with sevoflurane group
Maintenance of anesthesia in the high flow group will be provided with a high fresh gas flow (4 L/min). The effect of high flow anesthesia on oxidative and neuroendocrine stress response will be evaluated by the levels of: IL-6 (proinflammatory cytokine), ACTH (adrenocorticotropic hormone), Cortisol, TAS/TOS (total antioxidant/oxidant status) measured from blood samples. Blood samples will be taken from the antecubital area before the surgery begins, thus eliminating the need for repeated invasive procedures. Blood samples will be taken from the patients just before the surgery begins, at the end of the surgery, and at the 6th and 18th hours after the surgery.
Locations (1)
Bezmialem Vakif University
Istanbul, Fatih, Turkey (Türkiye)