New health technologies are constantly developing. However, their impacts on health and implications for health systems are not always clear. Faced with this situation, in the last 45 years, Health Technology Assessment (HTA) has taken an important role in the decision-making process related to the implementation of technologies in healthcare systems. According to the Core Model® EUnetHTA, a "full HTA" should cover nine domains: health problems and current use of technology, description and technical characteristics, safety, clinical effectiveness, costs and economic evaluation, ethical analysis, organizational aspects, patients and social aspects, legal aspects. In all domains of a HTA, the approach is evidence-based and uses epidemiological data, systematic reviews to gather the best level of proofs regarding clinical efficacy and safety of interventions and comparators and organizational and economic models. One exception is the ethical analysis, that uses value-based approach. Although in Neonatal Intensive Care Units (NICUs) there are highly advanced technological environments, HTA has not yet been widely used in this field for determining the "value" of the diagnostic and therapeutic procedures. An example of diagnostic tool used in NICUs is the near-infrared spectroscopy (NIRS), a noninvasive device that enables real-time monitoring of the condition of peripheral tissues in critically ill newborns. The availability of this diagnostic tool could improve the choice of the most appropriate treatment to the clinical situation of the newborn. The expected benefit of NIRS motivates the need of a full HTA.    Conclusion: HTA is still little used in Neonatal Critical Care, but it may be the appropriate tool to determine the "value" of technologies used in this field. The implementation of clinical trials and HTA may help in an evidence-based evaluation of new technologies for the neonatal critical care. This could facilitate the rapid introduction of the best health technologies into clinical practice. What is Known: • Health Technology Assessment (HTA) has taken an important role in the decision-making process related to the implementation of technologies in healthcare systems • The centrality of ethics in HTA has been known. In fact, ethics is everywhere in HTA, and value judgments permeate all levels of HTA What is New: • HTA is still little used in Neonatal Critical Care, but it may be the appropriate tool to determine the "value" of technologies used in this field • The implementation of clinical trials and HTA may help in an evidence-based evaluation of new technologies for the neonatal critical care and in introduction of the best and ethically acceptable health technologies into clinical practice.