Lack of maintenance of shortwave diathermy equipment has a negative impact on power output.
Although shortwave diathermy has been widely used by physiotherapists, there are a few studies assessing the performance of the equipment in use. The aim of the present study was to evaluate the procedures adopted by physiotherapists as users of shortwave diathermy continuous (CSWD), as well as to measure the power output and frequency of CSWD equipment. [Subjects and Methods] Twenty-three physical therapists were interviewed and 23 CSWD equipment were evaluated. Admeasurement was carried out by using a standard phantom to simulate the electrode-skin distance, which ranged from 0.5 to 3.0 cm. Data analysis was performed by using descriptive statistics, ANOVA, and a post-hoc Tukey's test or Pearson's correlation coefficient. [Results] The questionnaires showed that 48% of the interviewees use the correct electrode-skin distance, 70% use a single electrical outlet, and 35% use a grounded electrical outlet, and that 48% of the physiotherapy tables and 61% of the plinths were made of wood. However, only 13% of the interviewees perform yearly preventive maintenance. The highest power (95.56 W) was achieved at electrode-skin distances ranging from 1.0 to 1.5 cm, with distances of 2.5 cm and 3.0 cm being null in four and eight equipment, respectively. There was a negative correlation between power output and electrode-skin distance as well as between power output and purchase date. [Conclusion] The physiotherapists involved in this study had inadequate knowledge about the correct use of CSWD equipment, which may adversely affect its performance and patient safety.
Laboratory of Physiotherapeutic Resources, Department of Biomechanics, Medicine and Rehabilitation of the Locomotor System, Laboratory of Physiotherapeutic Resources, Ribeirão Preto Medical School of University of the São Paulo, Brazil ; Post-Graduation Program in Rehabilitation and Functional Performance, Ribeirão Preto Medical School of the University of São Paulo, Brazil.
Rinaldo Roberto de Jesus
RR
Guirro
Laboratory of Physiotherapeutic Resources, Department of Biomechanics, Medicine and Rehabilitation of the Locomotor System, Laboratory of Physiotherapeutic Resources, Ribeirão Preto Medical School of University of the São Paulo, Brazil ; Post-Graduation Program in Rehabilitation and Functional Performance, Ribeirão Preto Medical School of the University of São Paulo, Brazil.
Elaine Caldeira de Oliveira
EC
Guirro
Post-Graduation Program in Rehabilitation and Functional Performance, Ribeirão Preto Medical School of the University of São Paulo, Brazil.
Natanael Teixeira
NT
Alves de Sousa
Diathermy; Measured; Physical therapy modalities