Abstract
Objectives: To investigate the prevalence of left vocal cord paralysis (LVCP) after neonatal patent ductus arteriosus (PDA) surgery in young adults born extremely preterm (EP i.e. <28 weeks of gestation) or at extremely low birthweight (ELBW i.e. <1000 g) and to compare lung function and exercise capacity between the subject with or without LVCP.
Methods: All subjects in a nationwide cohort of young adults born EP/ELBW during 99-00 who had a history of neonatal PDA surgery were invited to undergo examination with laryngoscopy, vocal cord stroboscopy, spirometry and continuous laryngoscopy during maximal treadmill exercise.
Results: Thirty (63%) of 48 eligible subjects were examined at mean (standard deviation (SD)) age 19.4 (0.8) years. Mean birthweight was 792 (178) g and median (range) gestational age was 26 (23-29) weeks. Sixteen (53%) participants were diagnosed with LVCP, including two with additional laryngeal pathology, three (10%) had other laryngeal pathology, and 11 (37%) had a normal larynx.
Mean (95% confidence interval (CI)) z-score for forced expiratory volume in 1 second was -1.8 (-2.5 to -1.0) in the group with LVCP and -1.5 (-2.6 to -0.4) in the group with normal larynx. Mean (95% CI) peak oxygen consumption (%predicted) was 80 (68 to 92) % in the group with isolated LVCP and 79 (75 to 84.0) % in the group with normal larynx.
Conclusions: LVCP was common in young adult exposed to neonatal PDA surgery as EP/ELBW infants. Aerobic capacity and lung function were reduced in both groups, but seemingly not influenced by LVCP.
Footnotes
Cite this article as: European Respiratory Journal 2020; 56: Suppl. 64, 4793.
This abstract was presented at the 2020 ERS International Congress, in session “Respiratory viruses in the "pre COVID-19" era”.
This is an ERS International Congress abstract. No full-text version is available. Further material to accompany this abstract may be available at www.ers-education.org (ERS member access only).
- Copyright ©the authors 2020