Study aim: Determining the effect of acupressure on intestinal function in patients undergoing coronary artery bypas surgery Design: The present study is a three-group randomized controlled clinical trial. Eligible patients will be randomly assigned to three groups of 30: acupressure, sham, and control. Settings and conduct: In the cardiac intensive care unit of Semnan Heart Center, In the intervention group, one minute of thumb pressure will be applied vertically, then 5 seconds of rest and then one minute of rotational movement. Due to the fact that the interventions are performed simultaneously, in total, each time, a maximum of 3 minutes of intervention will be applied to the patient. The intervention will be performed from 48 hours after the operation to 96 hours after the operation. Participants/Inclusion and exclusion criteria: Inclusion criteria: People undergoing CABG surgery. No chronic constipation according to RomeIV criteria Lack of known neurological and mental illnesses under treatment Absence of wounds, organ defects, allergies, and fractures in the areas of acupressure no gastrointestinal disorders No dependence or addiction to any drugs Lack of pulmonary drainage and discharge more than 200 ml per hour Exclusion criteria: Patients using combination therapies such as acupuncture, herbal remedies, hypnosis, or yoga Patients need laxatives other than magnesium hydroxide from 96 hours after surgery Patients undergoing emergency coronary artery bypass graft surgery. Intervention groups: Acupressure: This intervention will be performed by a member of the research team under the training of another member of the team with acupuncture. Control group: These patients are given nutritional training and heart disease routines. Sham: Normal nursing nutrition and care is provided and the procedure will be exactly the same as the test group; Main outcome variables: Intestinal function