Transillumination at the neonatal intensive care unit Forgotten possibilities of a classical method? Müller-Hansen I*, Stihler A+ *Dept. for Neonatology at the Children's Hospital, Universitätsklinikum Tübingen + Company Stihler Electronic, Stuttgart

Background The method of transillumination (TI) or diaphanoscopy in the field of paediatrics was first mentioned for the diagnostics of the hydrocephalus in the sixties of the last century. In the following decades, this method was applied for the quick identification of pneumothorax and pneumoperitoneum and for the diagnosing a hydrocele in the neonatal period. In 1975, Kuhn and others described the advantages of the TI for exploring veins for the first time. Then, evaluations followed in the connection with arterial punctures. The devices which were like pocket torches (otoscopes, etc.) were supplemented by cold-light sources with fibre-optical light cables. In the last time, the light emitting diodes (LED) have been added.

Results For the first time, we are presenting the new device ASTODIA (company Stihler Electronic, Stuttgart; www.stihlerelectronic.de) which we have developed on the basis of our experience. It includes two selectable, dimmable, high-performance light-emitting diodes of different colours (red and yellow). Furthermore, it is small, easy to transport, rechargeable, can be sterilized well, and, if it is sterile packaged, it will be suitable also for procedures like the application of central catheters. Cutaneous heat measurements under TI and clinical handling did not give any indications for thermal stress because, in case the high light intensity has been selected, a safety circuit limits the time for the selected level and reduces it. Criterions: Assessment: Angled optics yes Luminous power +++ (red or yellow) Dimmability yes Dimensions LxBxH (cm) small 6,8 x 1,6 x 1,0 Desinfekcion +++ Engergy source Battery

Conclusion Due to the improved application of the new device in connection with an appropriate training, the TI could be used as routine method at neonatal intensive care units much more often than before. Especially in case of difficult vessel conditions with small premature babies it would be a contribution to careful treatment.