Ultrasound Screening After Cardiac Surgery Shows Vocal Fold Impairment and Predicts Aspiration

Vocal fold motion impairment (VFMI) is a known consequence after high-risk cardiac surgery. We implemented a universal laryngeal ultrasound (LUS) screening protocol for VFMI after the Norwood and aortic arch surgery. We hypothesized that LUS would accurately identify VFMI and predict postoperative aspiration.

We implemented a screening algorithm with LUS for patients undergoing high-risk cardiac surgery at a tertiary care pediatric hospital. Positively screened patients underwent flexible nasolaryngoscopy (FNL). Patients with an abnormal FNL underwent a video-fluoroscopic swallow study (VFSS). Patient demographics, length of stay, and swallowing outcomes were assessed. Two-tailed chi square and Wilcoxon rank sum tests were used to assess for differences.

Sixty-seven patients underwent either Norwood or arch reconstruction over a 16-month period and underwent universal LUS. The average birth weight was 3.24 kg (SD 0.57). Of the 67 patients, VFMI was identified by LUS and 100% confirmed on FNL in 58.21% (n = 39/67) of patients. Aspiration and penetration on VFSS were higher in the group with VFMI as compared with those without VFMI (53.8% vs. 21.4%, p = 0.008). There was no difference in length of stay between patients who did not have a diagnosis of VFMI and those found to have VFMI (41.0 days vs 45.3 days p = 0.73).

Universal LUS screening for patients following high-risk cardiac surgery may lead to earlier identification of postoperative VFMI and aspiration. Recognition of VFMI through this universal screening program could lead to earlier interventions and possibly improved swallowing outcomes.

3 Laryngoscope, 134:1939-1944, 2024.