The objective of this clinical trial is to determine the effectiveness of pain reduction between an experimental treatment and the usual one when removing thoracic drains in post cardiac surgery patients, in a Cardiovascular Critical Patient Unit, in Temuco, between the years 2024- 2026. Its safety will also be analyzed. The main questions to be answered are:

- What is the effectiveness of non-pharmacological therapies in reducing pain in the removal of chest drains in post-operated patient of cardiac surgery, in Cardiovascular Critical Patient Unit, Temuco, between the years 2024- 2026?

Participants:

• Two non-pharmacological therapies will be applied, to one group aromatherapy with lavender essential oils, which were previously submitted to oil property analysis. And another group with local cold therapy, there will also be a control group with the usual pharmacological therapy.
• All the groups will receive the usual pharmacological treatment, the non pharmacological therapies will only be of support, in no case they will replace the usual medical therapy.

Controlled clinical trial, randomized, single-blind, with a sample of 100 postoperative cardiac surgery patients who meet inclusion and exclusion criteria. The sample will be obtained by two nurses with more than 8 years of experience in cardiac intensive care and specializations, of these patients all will receive the usual pharmacological therapy, will be divided into three groups: 25 patients (local cold); 25 patients (aromatherapy); 50 patients (with usual pharmacological therapy, indicated by medical team, without adding TNF). Data will be collected through a form. The database will be exported to STATA CORP18 software, where they will be analyzed. The ethical requirements of Ezequiel Emanuel will be considered.

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Inclusion Criteria:

• Postoperative cardiac surgery patient with indication of the cardiac surgeon to remove chest drains within the first 24 hours postoperatively.
• Patient who follows orders and with vigil state of consciousness, temporally and spatially oriented.
• Usual analgesic treatment indicated by physician: paracetamol 1 g every 8 hours; or Metamizole 1 g every 8 hours; Ketoprofen every 8 hours, or pregabalin 75 mg every 24 hours, last administration at 07:00 am.
• INR < 2.5; Platelets > 50,000.

Exclusion Criteria:

• Patient with psychomotor agitation
• Dependence on psychotropic drugs, alcohol, or with abstinence syndrome.
• Patient in postoperative course with cardiogenic shock, with need for 2 or more vasoactive drugs (VAD).
• Older than 80 years old.
• Maintained with continuous infusion pump (CIB) of analgesia.
• Refractory pain, with second line management: Lidocaine patches, Buprenorphine patches, Patient controlled analgesia pump.
• Administration of anticoagulant at 07:00 am.

Under no circumstances will personal information of the enrolled subjects be shared, data such as:

• Ages.
• Pain assessment.
• Gender.
• Type of surgery.
• Number of drains.

Beginning 3 months and ending 3 years after the publication of results