Ultrasound-Guided Mid-Point Transverse Process to Pleura Block Versus Thoracic Paravertebral Block for Pain Management in Patients With Multiple Rib Fractures (A Prospective Randomized Double- Blinded, Non-inferiority Trial )

"TPVB and MTPB was performed at a spinal level midway between the uppermost and the lowest fractured rib, with the patient in a sitting position, and under complete aseptic conditions, a linear ultrasound probe (GE Healthcare-Logiq F6) will be placed oblique parasagittally 3 cm lateral to spinous process used to identify the transverse process, pleura, superior costotransverse ligament, and the paravertebral space at the target vertebral level.~After skin and subcutaneous tissue infiltration with 2-3 mL of 2% lignocaine, an 18-gauge Touhy needle was inserted under ultrasound guidance until the needle tip reaches :~* the midpoint between the transverse process and the pleura (group M).~* the paravertebral space (group P). A bolus dose (0.3mL/kg) of plain bupivacaine 0.5% plus 8 mg of dexamethasone was injected after negative aspiration to blood and air."