Aim of the work :

Evaluation of the role of Remote Ischemic Preconditioning (RIP) on liver function in patients undergoing on-pump cardiac surgery.

Inclusion Criteria:

1. Being candidate for on-pump cardiac surgery.
2. Willing to participate in the study
3. Ages eligible for the study: 18 to 70 years.
4. Gender eligible for the study : both

Exclusion Criteria:

1. Patient refusal.
2. Known cause of possible liver function disturbances that includes right heart failure, acute inflammation of gallbladder or any other complication of gallstone disease.
3. Active viral and non viral hepatitis.
4. Pregnant women.
5. History of peripheral nerve disease or peripheral vascular disease of the extremities