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Population Pharmacokinetics and Dosage Individualization of Paracetamol and Ibuprofen in Children With PDA

The investigator's purpose is to study the population pharmacokinetics of paracatamol and ibuprofen in neonates with patent ductus arteriosus (PDA) and assess the feasibility of dosage individualization.

Amplatzer Piccolo Occluder Japan Post-marketing Database Surveillance

The purpose of this post-marketing clinical use database surveillance is to observe the frequency, type, and degree of adverse device effects and adverse events in order to assure the safety of the medical device, and to collect safety and efficacy information for evaluating the results of its clinical use.