title: PainVision Apparatus Is Effective for Assessing Low Back Pain.
abstract: METHODS
  Case series.
  
  
  OBJECTIVE
  To determine the utility of "PainVision" apparatus for the assessment of low back pain.
  
  
  BACKGROUND
  A newly developed device, the PainVision PS-2100 (Nipro, Osaka, Japan), has been used to assess the perception of pain in a quantitative manner. In the current study, we aimed to evaluate the efficacy of PainVision for the assessment of low back pain.
  
  
  METHODS
  We assessed 89 patients with low back pain. The numeric rating scale (NRS) score, McGill Pain Questionnaire (MPQ) score and the degree of pain calculated by PainVision were measured twice at 4-week intervals in each patient. An electrode was patched on the forearm surface of the patients and the degree of pain was automatically calculated (degree of pain=100×[current producing pain comparable with low back pain-current at perception threshold/current at perception threshold]). Correlations between NRS and MPQ scores and the degree of pain were determined using Spearman's rank correlation test.
  
  
  RESULTS
  There was a strong correlation between the NRS and MPQ scores at each time point (rs =0.60, p<0.0001). The degree of pain also showed a moderate correlation with NRS and MPQ scores at each time point (rs =0.40, p<0.03). The change in the degree of pain over 4 weeks showed a moderate correlation with changes in the NRS and MPQ scores (rs =0.40, p<0.01).
  
  
  CONCLUSIONS
  PainVision as self-reported questionnaires is a useful tool to assess low back pain.
authors.affiliation: Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Japan.
authors.forename: Seiji
authors.initials: S
authors.lastname: Ohtori
authors.affiliation: Department of Orthopedic Surgery, Faculty of Medicine, University of Tokyo, Tokyo, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kawaguchi
authors.affiliation: Department of Orthopedic Surgery, Sapporo Medical University School of Medicine, Sapporo, Japan.
authors.forename: Tsuneo
authors.initials: T
authors.lastname: Takebayashi
authors.affiliation: Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Japan.
authors.forename: Sumihisa
authors.initials: S
authors.lastname: Orita
authors.affiliation: Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Japan.
authors.forename: Gen
authors.initials: G
authors.lastname: Inoue
authors.affiliation: Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Japan.
authors.forename: Kazuyo
authors.initials: K
authors.lastname: Yamauchi
authors.affiliation: Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Japan.
authors.forename: Yasuchika
authors.initials: Y
authors.lastname: Aoki
authors.affiliation: Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Japan.
authors.forename: Junichi
authors.initials: J
authors.lastname: Nakamura
authors.affiliation: Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Japan.
authors.forename: Tetsuhiro
authors.initials: T
authors.lastname: Ishikawa
authors.affiliation: Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Japan.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Miyagi
authors.affiliation: Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Japan.
authors.forename: Hiroto
authors.initials: H
authors.lastname: Kamoda
authors.affiliation: Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Japan.
authors.forename: Miyako
authors.initials: M
authors.lastname: Suzuki
authors.affiliation: Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Japan.
authors.forename: Gou
authors.initials: G
authors.lastname: Kubota
authors.affiliation: Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Sakuma
authors.affiliation: Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Japan.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Oikawa
authors.affiliation: Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Japan.
authors.forename: Kazuhide
authors.initials: K
authors.lastname: Inage
authors.affiliation: Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Sainoh
authors.affiliation: Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Japan.
authors.forename: Jun
authors.initials: J
authors.lastname: Sato
authors.affiliation: Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Japan.
authors.forename: Kazuhisa
authors.initials: K
authors.lastname: Takahashi
authors.affiliation: Department of Orthopedic Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan.
authors.forename: Shinichi
authors.initials: S
authors.lastname: Konno
keywords: Assessment; Low back pain; PainVision; Tool