Background: Rib fractures are present in 10% of all trauma patients and 30% of patients with significant chest trauma. Pain from rib fractures results in decreased respiratory effort which can lead to atelectasis and potentially pneumonia and death. Pain control is therefore of utmost importance in preventing the complications of rib fractures by improving respiratory function. Erector spinae plane blocks (ESPB) have been effectively used in elective surgery with subjective and objective improvements in pain.
Materials and methods: We sought to evaluate subjective pain and objective evaluation of respiratory effort by way of incentive spirometry levels after administration of an ESPB for patients with rib fractures. Our trauma service applied ESPB over 2 years in patients with rib fractures. Ultrasound guidance was used to administer 50cc of a long-acting local anesthetic at the transverse process underneath the erector spinae muscle group. Evaluation of pain scores and incentive spirometry levels were measured prior to and after the ESPB.
Results: In total, we obtained data from 45 patients. Mean pre-pain scores were 7.93 with post-pain scores of 4.47 (p < 0.001). Mean pre-block incentive spirometry volumes were 1160 cc with post-block IS of 1495cc (p 0.035). There were no associated complications.
Discussion: ESPBs are safe and significantly reduce pain scores and increased incentive spirometry volumes after administration. They are easy to perform and can be done by the trauma service, including trainees. ESPB has the potential to reduce pulmonary complications of rib fractures, as well as subjectively improving pain experienced by our trauma patients. Based on our results, we recommend this block as an adjunct to multimodal analgesia for patients with rib fractures.
Keywords: acute care surgery; trauma.