Ultrasound- Guided Continuous Serratus Anterior Plane Block Versus Ultrasound- Guided Continuous Thoracic Paravertebral Block in Multiple Traumatic Rib Fractures.

A bolus dose of 0.25% bupivacaine (0.3 ml/kg) will be injected slowly over 3-5 minutes. At 30 minutes after injection of the loading dose, the dermatomal loss of sensation to pinprick was tested. Patients who reported pain to pinprick will be considered to have a failed block and were excluded from the study. The block will be maintained by continuous infusion of bupivacaine 0.25% at a rate of 0.1 ml/kg/h via a syringe pump. The infusion will be continued for 4 days.

A bolus of 30 ml of 0.25% bupivacaine will be injected slowly over 3-5 minutes between latissmus dorsi muscle and serratus anterior muscle (Figure 15). Then a catheter was inserted through the Tuohy needle and advanced 3cm into the space and secured in place. At 30 minutes after injection of a loading dose, the dermatomal loss of sensation to pinprick will be tested. Patients who reported pain to pinprick will be considered to have a failed block and were excluded from the study. The block will be maintained by continuous infusion of bupivacaine 0.25% at a rate of 0.1 ml/kg/h via a syringe pump. The infusion was continued for 4 days.