SciELO - Scientific Electronic Library Online

vol.43 issue1Chronic Peritoneal Dialysis in Paedriatrics: the Chilean ExperienceClinical significance of coagulase-negative staphylococci isolated from neonates author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Revista de la Sociedad Boliviana de Pediatría

On-line version ISSN 1024-0675


SAFFER, Moacyr  and  MIURA, Maurício S.. Tympanostomy tubes and water. Rev. bol. ped. [online]. 2004, vol.43, n.1, pp. 40-41. ISSN 1024-0675.

Objective: an in vitro study was conducted to set the necessary pressure in fluids that could break resistance and cross the opening of a tympanostomy tube. Methods: a water column model was created and graduated in centimeters from base to top. We adapted three sorts of ventilation tubes. In each model, fluids were tested (tap water, seawater, river water, soapy water and eardrops). The column was filled with fluid until a threshold was reached, flowing through the tube opening. The threshold was registered and represented the pressure in cmH 2 O. Results: the results show that pressure is necessary so that a fluid can cross the opening of a ventilation tube. Conclusion: in spite of limitations of our in vitro study, the literature suggests that no ear protection is needed during shower, since there is neither direct flow of water nor pressure in the ear. Bathing with soapy water is potentially dangerous due to the reduction in surface tension. The direct relation of pressure and surface tension through the opening of tympanostomy tubes indicates the need to decrease pressure when diving and to avoid strong head movements in the water.

Keywords : water; ventilation tubes; otorrhea.

        · abstract in Portuguese     · text in Portuguese


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License