dc.creatorFERRARI, C. B.
dc.creatorAndrade, Marco Aurélio Brizzotti
dc.creatorAdamowski, Julio Cezar
dc.creatorGuirro, Rinaldo Roberto de Jesus
dc.date.accessioned2012-10-19T01:43:25Z
dc.date.accessioned2018-07-04T14:50:12Z
dc.date.available2012-10-19T01:43:25Z
dc.date.available2018-07-04T14:50:12Z
dc.date.created2012-10-19T01:43:25Z
dc.date.issued2010
dc.identifierUltrasonics, v.50, n.7, p.704-709, 2010
dc.identifier0041-624X
dc.identifierhttp://producao.usp.br/handle/BDPI/18325
dc.identifier10.1016/j.ultras.2010.02.006
dc.identifierhttp://dx.doi.org/10.1016/j.ultras.2010.02.006
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1615120
dc.description.abstractThe therapeutic ultrasound (US) is one of the resources mostly used by physiotherapists; however the use of uncalibrated equipments results in inefficient or even harmful therapies to the patient. In this direction, the objective of this study was to evaluate the performance and the procedures of utilization and maintenance of US in use in clinics and Physical-therapy offices. A questionnaire with questions related to the procedures applied in service during the use of therapeutic ultrasound was applied to physiotherapists. The performance of 31 equipments of 6 different brands and 13 different models was evaluated according to the IEC 61689 norm. The parameters measured were: acoustic power; effective radiating area (AER); non-uniformity ratio of the beam (RBN); maximum effective intensity; acoustic frequency of operation, modulation factor and wave form on pulsate mode. As for the questionnaires, it was evident that the professionals are not concerned about the calibration of the equipment. The results demonstrated that only 32.3% of the equipments were in accordance with the norms for the variables power and effective radiation area. The frequency analysis indicated that 20% of the 3 MHz transducers and 12.5% of the 1 MHz contemplated the norms. In the pulsate mode, 12.7% presented relation rest/duration inside allowed limits. A great variation of the ultrasonic field was observed on the obtained images, which presented beams not centered, sometimes with bifurcation of its apex. The results allow concluding that, although used in therapeutic sessions with the population, none of the equipments presents all the analyzed variables inside technical norms. (C) 2010 Elsevier B. V. All rights reserved.
dc.languageeng
dc.publisherELSEVIER SCIENCE BV
dc.relationUltrasonics
dc.rightsCopyright ELSEVIER SCIENCE BV
dc.rightsrestrictedAccess
dc.subjectUltrasound
dc.subjectAcoustic power
dc.subjectEffective radiating area
dc.subjectGauging
dc.titleEvaluation of therapeutic ultrasound equipments performance
dc.typeArtículos de revistas


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