Monocentric, randomized, controlled, single-blind study who's aim is to demonstrate the efficacy of the association of paravertebral block and serratus plane block with paravertebral block alone

Inclusion Criteria:

• Patient aged 18 to 75 years;
• Programmed for unilateral videothoracoscopy for anatomical resection (segmentectomy, lobectomy);
• Subject affiliated to a social security scheme;
• Subject having signed an informed consent

Exclusion Criteria:

• Chronic treatment with opiates;
• Contraindication to administration of morphine;
• Allergy to local anesthetics or contraindications to the use of ropivacaine;
• Contraindication to the realization of paravertebral blocks and serratus;
• Pregnancy, breastfeeding;
• Severe obesity (BMI > 40 kg/m²);
• Renal impairment (GFR < 30 mL/min) or known severe hepatic impairment;
• Difficulties of comprehension preventing the collection of consent and the realization of the study;