We present a case of a patient with Marfan syndrome and thoracic aortic aneurysm who was surgically intervened by left thoracotomy. An individualized care plan was prepared upon arrival at the inpatient unit after surgery. His health needs were observed and analyzed, establishing nursing diagnoses, outcome criteria and interventions. Potential complications: pain, risk of infection, dyspnea. Nursing diagnosis: impaired mobility, anxiety, willingness to improve the management of therapeutic regimen.