| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated | 
| Study population are: Children who develop an atelectasis during mechanical ventilation. An atelectasis is a collapsed part of the lung that is often caused by mucus plugs.
 
 |  | 
| MedDRA Classification | 
| E.1.3 | Condition being studied is a rare disease | No | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial | 
| To evaluate the efficacy of inhaled rhDNase in addition to conventional treatment in children with an atelectasis during mechanical ventilation. 
 |  | 
| E.2.2 | Secondary objectives of the trial | 
| Change from baseline in Chest radiograph-score at 24 hours, and change in: ventilatory settings; saturation; blood-gas values and DNA content in tracheal aspirates; duration of mechanical ventilation. |  | 
| E.2.3 | Trial contains a sub-study | Information not present in EudraCT | 
| E.3 | Principal inclusion criteria | 
| 1. Age 0-18 years 2. Mechanical ventilation
 3. Presence of an atelectasis on a chest radiograph (CXR)
 4. First dose of study medication can be administered within 12 hours after an atelectasis has been diagnosed.
 
 |  | 
| E.4 | Principal exclusion criteria | 
| 1. Children with neuromuscular disorders and impaired ability to cough; cardiomyopathy; or cystic fibrosis. 2. Post-gestational age < 32 weeks
 3. Mechanical ventilation during muscle paralysis
 4. Atelectasis due to a bronchoscopically diagnosed:
 - foreign body aspiration
 - tracheal or bronchial compression by lymph nodes or vessels
 5. RhDNase treatment in the previous 48 hours.
 6. Clinical condition or ventilator settings that are not compatible with nebulizing medication (according to the responsible physician)
 7. Presence of a pneumothorax
 
 |  | 
| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| Change from baseline in Chest radiograph-score at 48 hours. |  | 
| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis | No | 
| E.6.2 | Prophylaxis | No | 
| E.6.3 | Therapy | No | 
| E.6.4 | Safety | No | 
| E.6.5 | Efficacy | Yes | 
| E.6.6 | Pharmacokinetic | No | 
| E.6.7 | Pharmacodynamic | No | 
| E.6.8 | Bioequivalence | No | 
| E.6.9 | Dose response | No | 
| E.6.10 | Pharmacogenetic | Information not present in EudraCT | 
| E.6.11 | Pharmacogenomic | No | 
| E.6.12 | Pharmacoeconomic | No | 
| E.6.13 | Others | No | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) | No | 
| E.7.1.1 | First administration to humans | No | 
| E.7.1.2 | Bioequivalence study | No | 
| E.7.1.3 | Other | No | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) | No | 
| E.7.3 | Therapeutic confirmatory (Phase III) | Yes | 
| E.7.4 | Therapeutic use (Phase IV) | No | 
| E.8 Design of the trial | 
| E.8.1 | Controlled | Yes | 
| E.8.1.1 | Randomised | Yes | 
| E.8.1.2 | Open | No | 
| E.8.1.3 | Single blind | No | 
| E.8.1.4 | Double blind | Yes | 
| E.8.1.5 | Parallel group | Yes | 
| E.8.1.6 | Cross over | No | 
| E.8.1.7 | Other | No | 
| E.8.2 | Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) | No | 
| E.8.2.2 | Placebo | Yes | 
| E.8.2.3 | Other | No | 
| E.8.3 | The trial involves single site in the Member State concerned | Yes | 
| E.8.4 | The trial involves multiple sites in the Member State concerned | No | 
| E.8.5 | The trial involves multiple Member States | No | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA | No | 
| E.8.6.2 | Trial being conducted completely outside of the EEA | Information not present in EudraCT | 
| E.8.7 | Trial has a data monitoring committee | Information not present in EudraCT | 
| E.8.8 | Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial | 
| For the individual subject the trial is ended after 4 doses of study medication have been given or earlier in the case a patient is extubated earlier. The trial ends when all planned patients have finished the study.
 |  | 
| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 1 | 
| E.8.9.1 | In the Member State concerned months | 3 | 
| E.8.9.1 | In the Member State concerned days |  | 
| E.8.9.2 | In all countries concerned by the trial years | 1 | 
| E.8.9.2 | In all countries concerned by the trial months | 3 |