Predictors of long-term respiratory insufficiency of exomphalos major.

INTRODUCTION

Exomphalos major (EM) is associated with significant morbidity and even mortality with an important risk of long-term pulmonary disease.

AIM

To assess the outcomes of exomphalos in a single tertiary pediatric unit and to identify prognostic factors for patients with respiratory insufficiency who still require ventilatory assistance at six months.

MATERIAL AND METHODS

All infants admitted to our institution over a 10-year period (2005 to 2015) with exomphalos were retrospectively reviewed. EM was defined when the abdominal wall defect measured >= 5 cm and/or contained liver within the sac. Data were collected on patient demographics, prenatal course and imaging, birth information, immediate and long-term outcomes. Those with long-term respiratory insufficiency were identified as the primary outcome and reviewed to assess prognostic factors. A p value of ≤0.05 was regarded as significant. Data are quoted as median(range).

RESULTS

A total of 46 infants were diagnosed with exomphalos during the study period, with most (n = 30, 65%) defined as exomphalos major. Respiratory complications occurred in 16 (35%) with 8 (50%) of these requiring long-term (≥6 months) mechanical ventilation and 5 (31%) required a tracheostomy. On univariate analysis, resuscitation at birth (p = 0.0004), birth weight <3000 g (p = 0.008), use of nitric oxide (p = 0.004), high frequency oscillatory ventilation (HFOV) (p = 0.001), pulmonary hypoplasia (p<0.0001) and pulmonary hypertension (PHTN) (p = 0.02) were significantly associated with respiratory insufficiency. The strongest predictive model for ventilation support at six months was resuscitation at birth in combination with PH (OR = 1.57). Five infants (11%) died at 5(1-122) days.

CONCLUSIONS

In patients with EM, the presence of pulmonary hypertension along with resuscitation at birth are the most important prognostic factors for long-term respiratory insufficiency. Acknowledgement of these factors allows for better parental counselling regarding respiratory outcomes.