Pain Clinical Trial
Official title:
Effect of Lidocaine Phonophoresis on Sensory Blockade: Pulsed or Continuous Mode of Therapeutic Ultrasound?
The optimisation of drug absorption through skin is of great value in modern
therapy.Phonophoresis is the use of therapeutic ultrasound to increase percutaneous drug
absorption. However,few studies have compared pulsed and continuous modes of therapeutic
ultrasound.This study compared these two modes by investigating the effect of lidocaine
phonophoresis on sensory blockade.
Ninety-three healthy volunteers, assigned at random to one of three ultrasound
groups:pulsed(ultrasound+lidocaine),continuous(ultrasound+lidocaine)and control(sham
ultrasound+lidocaine).
Lidocaine was administered transdermally using a transducer.Two point discrimination, touch
and maximum pain thresholds were assessed before and after the intervention in each group.
Pulsed ultrasound with topical lidocaine gel induced greater anaesthetic effect compared
with continuous ultrasound with topical lidocaine gel and lidocaine application alone. The
mechanical properties of pulsed ultrasound appear to be responsible for greater drug
penetration.
Lidocaine is a common local anaesthetic drug that is used topically to relieve pain,itching and burning, and also for minor surgery.However,its application via this conductive method,has been confined to surface anaesthesia because it seems that it is not possible to have a deep transmission with local drug massage, without injection or systematic administration.On the other hand,the injection of lidocaine can lead to tissue injury and pain,and its use is not advised in children. Phonophoresis is one of the common procedures for reducing these problems. Therefore, the main aim of this study was to compare the two modes of therapeutic ultrasound by assessing the effect of lidocaine gel phonophoresis on percutaneous absorption and sensory blockade. ;
Allocation: Randomized, Intervention Model: Single Group Assignment, Masking: Double Blind (Subject, Outcomes Assessor), Primary Purpose: Basic Science
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