Ultrasound Guided Thoracic ESPB for Post Mastectomy Pain Control, Comparing 2 Dosing Regimens of Lidocaine With Different Drug Volumes

Ultrasound Guided Thoracic Erector Spine Plane Block for Post Mastectomy Pain Control, Effect of Volume With Constant Drug Mass, a Randomized Controlled Trial

The investigators compare 2 different drug regimens using 2 different volumes of lidocaine with the same drug content (i.e. different concentrations) as regards efficacy of post operative analgesia following mastectomy surgery

Inclusion Criteria:

• ASA 2 & 3 for elective breast cancer surgery

Exclusion Criteria:

• ASA > 3
• BMI > 35 kg/m2
• Contraindications to LA (coagulopathy and local infection)
• Allergy to the drug
• Cardiac, hepatic and renal patients