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Assessment of Temperature by Infrared Thermography and Blood Conduction Velocity by Doppler After Applying Shortwave Diathermy and Microwave - Correlations With Cardiovascular and Hemodynamic Parameters

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01872117
Recruitment Status : Completed
First Posted : June 7, 2013
Last Update Posted : July 21, 2017
Information provided by (Responsible Party):
Rinaldo Roberto de Jesus Guirro, University of Sao Paulo

Brief Summary:
The deep heat therapies are increasingly frequent in daily physical therapist for the treatment of musculoskeletal diseases. The use of such procedures is justified by their analgesic, anti-inflammatory, antiespasmolíticos and hiperemiantes. However, studies on the cardiovascular effects of these therapies are still incipient. Therefore, this study has as objectives: map the skin temperature changes in the lower limbs in different areas and positions after applying shortwave diathermy and microwave; assess hemodynamic and autonomic cardiovascular parameters, and investigate the occurrence of changes in conduction velocity superficial blood resulting from the application of these thermal features. The study will be conducted on 40 female volunteers between 18 and 30 years, university, healthy, that fit the inclusion and exclusion criteria of the study. The analysis by infrared thermography will be held in a room with temperature maintained at 23 ± 1°C and humidity average 50%. The volunteers will stay in prone position, with the legs bare, resting for 20 min to stabilize skin temperature with temperature of the room. After this period will be held applying diathermy of shortwave or microwave for 20 minutes at moderate heat on the lower limb regions of the hamstrings and triceps surae in extension and flexion to 180° to 90°. The records beat to beat blood pressure and heart rate to autonomic and cardiovascular hemodynamic evaluation will be performed by means of equipment Finometer (Finapress Medical Systems, Inc.) and electrocardiogram (ADInstruments, Inc.), respectively, before and after application of diathermy. On the other hand, the images will be processed using FLIR ThermoScan and blood flow data will be collected through the Doppler ultrasound. The results will be processed and analyzed using descriptive statistics, submitted to a linear regression model with mixed effects (random effects and fixed), with p≤0.05.

Condition or disease Intervention/treatment Phase
Healthy Individuals Other: Shortwave therapy Other: Microwave therapy Not Applicable

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 40 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Triple (Participant, Investigator, Outcomes Assessor)
Primary Purpose: Other
Official Title: Assessment of Temperature by Infrared Thermography and Blood Conduction Velocity by Doppler After Applying Shortwave Diathermy and Microwave - Correlations With Cardiovascular and Hemodynamic Parameters
Actual Study Start Date : May 2013
Actual Primary Completion Date : September 2014
Actual Study Completion Date : May 2015

Arm Intervention/treatment
Experimental: Applications of shortwave diathermy Other: Shortwave therapy
Will be conducted in four stages, on different days: i) lower limb in extension and application of 180° for 20 min, ii) Lower limb knee flexion of 90° and application for 20 min; iii) lower limb extension in 180° without application iv) lower limb knee flexion of 90° without application.

Experimental: Applications of microwave diathermy Other: Microwave therapy
Will be held in two stages, on different days: i) lower limb in extension with angle of 180° and application for 20 min, ii) lower limb in extension of 180° without application.

Primary Outcome Measures :
  1. Cutaneous temperature changes after short wave diathermy and microwave [ Time Frame: 2 years ]
    The skin temperature data will be acquired by a digital infrared thermographer at a distance of 1,5 m litter. 3 thermographic images will be collected over the application of diathermy at times 0, 10 and 20 min. For this, after the initial 10 min, the electrodes will be quickly removed from contact with the skin surface, so it can also be observed at room temperature under the electrode. Completed the 20 min of application will be also evaluated the temperature effect on residual time 10 and 20 min after application, where the individual remained at rest in the same position.

Secondary Outcome Measures :
  1. Change in conduction velocity blood [ Time Frame: 2 years ]
    Data from the femoral artery blood flow will be collected through the Doppler Portable Ultrasound wave continues. Data will be collected after 20 minutes of acclimatization, immediately after application of shortwave diathermy and immediately after the 20 minutes of time resudual application.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 30 Years   (Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Age group aged between 18 and 30 years
  • No previous disease-order circulatory or nervous and did not have metal implants in areas to be studied,
  • Are not menstruating or even a week before, due to the change of blood flow in these periods

Exclusion Criteria:

  • Individuals who are using antipyretic medications
  • With a history of pain, injury or surgery on joints studied

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01872117

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University of Sao Paulo
Ribeirao Preto, Sao Paulo, Brazil, 14049-900
Sponsors and Collaborators
University of Sao Paulo

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Responsible Party: Rinaldo Roberto de Jesus Guirro, ph.D Professor, University of Sao Paulo Identifier: NCT01872117    
Other Study ID Numbers: U1111-1143-3596
First Posted: June 7, 2013    Key Record Dates
Last Update Posted: July 21, 2017
Last Verified: July 2017