Pain associated with rib movement cause inability to cough and breathe deeply that leads to reduction in the tidal volume and predisposes to significant atelectasis, sputum retention, pneumonia and a reduction in functional residual capacity .These factors in turn lead to decreased lung compliance, ventilation perfusion mismatch, hypoxemia and respiratory distress. Therefore, effective pain relief remains the cornerstone of management to prevent serious respiratory complications .

Thoracic paravertebral block and other regional techniques like intrapleural block and intercostal nerve blocks have variable success and high potential for local anaesthetic toxicity. Serratus anterior plane block is relatively novel technique that is less invasive, easier to perform and improve pulmonary function that reduces the incidence of pneumonia, number of ventilator days, and mortality, especially those sustaining five or more rib fractures

Inclusion Criteria:Patients aging from 20 to 70 years old.

• ASA physical status status I-II -- Patients suffering from blunt chest trauma with unilateral multiple rib fractures.

Exclusion Criteria:• Spinal cord injury.

• Epidural or spinal cord haematoma.
• Thoracic vertebral body fracture.
• Spinal injury awaiting assessment.
• Coagulopathy (platelets <50×109 litre-1, INR>1.5).
• Local infection or sepsis.
• Allergy to local anaesthetic.
• Inability to position patient due to associated injuries.
• Severe traumatic brain injury.
• Unstable lumbar or cervical spinal fractures.
• Hypotension.
• Hypovolaemia

adult malesandfemales

Patients aging from 20 to 70 years old. - ASA physical status status I-II

-- Patients suffering from blunt chest trauma with unilateral multiple rib fractures.