title: Objectivation of cerebral effects with a new continuous electrical auricular stimulation technique for pain management.
abstract: OBJECTIVE
  The electrical point stimulation system (P-STIM) reflects a new, miniaturized system for pain therapy through ear acupuncture. For this reason, ultrathin needles were applied at the ear. The needles stimulate the acupuncture areas at the ear using electrical impulses, which come from a little generator applied behind the acupunctured ear.
  
  
  METHODS
  This study describes continuous, non-invasive measurements of near infrared spectroscopy (NIRS) and multidirectional transcranial Doppler sonography in two healthy females (aged 23 and 27 years) during stimulation with P-STIM, for the first time.
  
  
  RESULTS
  The results of the pilot measurements have shown that electrical point stimulation using the new electrical stimulation system on eye acupuncture points is able to modulate the mean blood flow velocity (vm) of the supratrochlear artery. These effects were present using a stimulation frequency of 100 Hz. A lower increase in vm was found in the middle cerebral artery. In addition, stimulus induced, quantifiable and reproducible alterations of the regional cerebral NIRS parameters were be detected.
  
  
  CONCLUSIONS
  For the first time, P-Stim allows intermittent ear acupuncture stimulation for up to several days in combination with complete mobility for the patient.
authors.affiliation: Department of Vascular Surgery, Medical University of Vienna, Austria. j.szeles.akh@aon.at
authors.forename: J Constantin
authors.initials: JC
authors.lastname: Széles
authors.forename: Gerhard
authors.initials: G
authors.lastname: Litscher
mesh_terms: D015669:Acupuncture Points; D020831:Acupuncture, Ear; D000328:Adult; D001783:Blood Flow Velocity / Q000528:radiation effects; D002536:Cerebral Arteries / Q000503:physiopathology / Q000528:radiation effects; D002560:Cerebrovascular Circulation / Q000528:radiation effects*; D004558:Electric Stimulation; D005260:Female; D006801:Humans; D059408:Pain Management; D015203:Reproducibility of Results; D019265:Spectroscopy, Near-Infrared / Q000379:methods; D016896:Treatment Outcome; D017585:Ultrasonography, Doppler, Transcranial / Q000379:methods