The primary aim of this work is to assess the impact of exposure to isoflurane or sevoflurane as an inhalation anesthetic on the oxidative stress and inflammatory conditions in patients undergoing elective moderate invasive surgery (laparoscopic cholecystectomy).

Oxidative stress is defined as "an imbalance between oxidants and antioxidants in favour of the oxidants, leading to a disruption of redox signalling and control and/or molecular damage.

Isoflurane, which has been utilized since the 1980s, has a particularly low metabolism rate and solubility, leading to reduced induction of anesthesia during surgery and shortened recovery time after surgery.

Sevoflurane began to be used a decade later and has a lower blood-gas partition coefficient than the other anesthetics, leading to rapid induction of anesthesia and fast awakening after anesthesia.

Inclusion Criteria:

• Age from 20 to 60 years.
• Both sexes.
• American Society of Anesthesiologists (ASA) Physical Status I-II.
• Undergoing elective laparoscopic cholecystectomy under general anesthesia.

Exclusion Criteria:

• Refusal of participation in the study by patients.
• Diabetes (type I or II), endocrine system, and immune system diseases.
• Chronic infection and sepsis.
• Cardiac condition as classified bythe New York Heart Association (NYHA) > class II.
• Hepatic disease: INR > 1.5, and/or albumin < 2.5 g/dL.
• Renal disease: glomerular filtration rate (GFR) < 85 ml/min.
• Mental and neurological disorders.

The data will be available upon a reasonable request from the corresponding author after the end of study for one year.

After the end of study for one year.

The data will be available upon a reasonable request from the corresponding author.