Introduction:

Posterior pain in thoracoscopy has an 80% incidence. These procedures are done under general anesthesia or sedoanalgesia. The buprenorphin in dosage of 4 μg/kg it’s the foundation for post-operatory pain treatment, nevertheless, smaller dosage can be sufficient. The objective of this study is to demonstrate that a dosage of buprenorphin from 1-3 μg/kg provides suitable analgesia with less side effects during post-operatory in patients who underwent thoracoscopic surgery.

Material and methods:

We conducted a double-blind, prospective, transversal study, in 48 patients which underwent a thoracoscopy divided in 3 groups: A (1 μg/kg), B (2 μg/kg), and C (3 μg/kg) treated with buprenorphin. We studied side effects, pain intensity (NVE), and sedative effect (RASS) from 0 to 120 minutes postanesthesia.

Results:

Dosage from 1 to 3 μg/kg did not generate side effects. The analgesia effect is higher with 2 μg/kg (p = 0.019) and 3 μg/kg (p = 0.045). Dosage of 1 and 2 μg/kg have lower sedative effect.

Conclusion:

The multimodal analgesia was diminished by 200% inmidiate postsurgical pain. Dosage from 2-3 μg/kg of buprenorphine are effective for pain control with less side effects and a superficial sedative effect during post-operatory.

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