ANALYSIS OF NOISE IN A NEONATAL INTENSIVE -CARE UNIT

Background. - Noise constitutes a significant problem in Neonatal Inte nsive Care Units (NICU) because of its potential deleterious effects o n the newborn patients and staff The aim of this study was to evaluate the degree of noise in the NICU of Hospital S Joao, Oporto, in order to identify its origin and possibility of reducing it. Material and me thods. - Measurements of noise were made for 24 hours, between 13 and 14 June 1994, in five different locations inside the NICU, using a slo w time constant sonometer. Results. - The surrounding noise level chan ged between 61 and 67 dB (A), with spikes over 100 dB (A). Conclusion. - Our results were similar to those previously reported in the litera ture. The following measures to reduce the level of noise were taken: 1) reduction of alarm sounds to minimal safe level; 2) replacement of doors; 3) instructions to visitors and staff.