Continuous Ultrasound Guided Erector Spinae Plane Block vs Thoracic Paravertebral Block

Continuous Ultrasound Guided Erector Spinae Plane Block vs Thoracic Paravertebral Block for Postoperative Analgesia in Patients Undergoing Thoractomy

in this study the investigators will investigate and compare the analgesic efficacy of two techniques (continuous TPVB and continuous ESPB) in relieving thoracotomy pain

General Anesthesia will be induced with Fentanyl (1-2 μg/kg), Propofol (2-3 mg/kg), and Atracurium (0.5-0.8 mg/kg). Pressure controlled Volume guarantee Ventilation mode will be used to maintain O2 Saturation Above 98% and End tidal co2 Around 30-35 mmHg. Anesthesia will be maintained with Isoflurane 1.2 Minimum Alveolar Concentration inhalation after induction Group A: Patients will receive Loading dose of 20 ml 0.25% bupivacaine then continuous infusion U/S-Guided TPVB of 5 ml/h of 0.125% bupivacaine started through the catheter before the surgical procedure intraoperative and Group B: Patients will receive Loading dose of 20 ml 0.25% bupivacaine then continuous U/S-Guided ESPB of 5 ml/h of 0.125% bupivacaine started through the catheter before the surgical procedure intraoperative.

Inclusion Criteria:

- Eligible 40 patients will be older than 21 years old with American society of anesthesia physical status I& II scheduled for elective thoracotomy

Exclusion Criteria:

• Patients who are:
• Uncooperative.
• Having allergy to any of the study drugs.
• Known abuse of alcohol or medication.
• Having Local infection at the site of injection or systemic infection.
• Pregnancy.
• With coagulation disorders or on anticoagulation therapy