The association between patient positions including supine,prone, trendelenburg,reverse trendelenburg,45 degrees back up sitting position, 45 degrees legs lifted supine position and perfusion index.

Participants are taken to the recovery room and they will wait 15 minutes until measurements. After monitoring the perfusion index using the right ring finger, first the participant will be taken to supine position. The perfusion index value will be obtained after three minutes of measurement. Second, the position will change to 45 degrees back up sitting position and the measurement will be repeated. Then the participant will be taken to Trendelenburg position, reverse Trendelenburg position, prone, 45 degrees legs lifted supine position respectively, and same measurement will perform.

Inclusion Criteria:

• American society of anesthesiologists score of 1

Exclusion Criteria:

• any kind of disease

Volunteers American society of anesthesiologists score of 1