title: Randomized trial of trigger point injection for renal colic.
abstract: BACKGROUND
  Many drugs have been utilized for the treatment of renal colic, but to date no drugs that relieve pain quickly and completely have been developed. Thus, we conducted a prospective trial to evaluate the effects of trigger point injection on renal colic. In this study, we used a local injection of lidocaine to the trigger point of patients experiencing renal colic, and evaluated the efficacy in patients using the visual analog scale.
  
  
  METHODS
  Sixty patients with renal colic were enrolled in this study and divided into two groups by a simple randomization: (i) the butylscopolamine group (n = 30, intravenous injection of butylscopolamine bromide and sulpyrine); and (ii) the lidocaine group (n = 30, local anesthesia to the trigger point with lidocaine).
  
  
  RESULTS
  Renal colic had disappeared completely at the end of the trigger point injection in 15/30 patients and the average time required to produce a 50% improvement in symptoms was 9 min in all patients in the group. In the lidocaine group, only one patient needed an additional anodyne treatment after 60 min and none of the 29 patients whose pain disappeared within 60 min needed further anodyne treatment within 24 h. These results were all significantly superior to those of the conventional treatment. No side-effects and complications were observed.
  
  
  CONCLUSIONS
  Trigger point injection, in our experience, is an easy, safe and effective method for the amelioration of renal colic. It was significantly superior to the combination of intravenous butylscopolamine and sulpyrine.
authors.affiliation: Department of Urology, Kaizuka City Hospital, Osaka, Japan. iguchi@skyblue.ocn.ne.jp
authors.forename: Masanori
authors.initials: M
authors.lastname: Iguchi
authors.forename: Yoshinari
authors.initials: Y
authors.lastname: Katoh
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Koike
authors.forename: Taiji
authors.initials: T
authors.lastname: Hayashi
authors.forename: Masato
authors.initials: M
authors.lastname: Nakamura
mesh_terms: D000328:Adult; D000779:Anesthetics, Local / Q000008:administration & dosage*; D002086:Butylscopolammonium Bromide / Q000008:administration & dosage*; D003085:Colic / Q000188:drug therapy* / Q000209:etiology; D005260:Female; D006801:Humans; D015552:Injections, Intralesional; D007674:Kidney Diseases / Q000150:complications*; D008012:Lidocaine / Q000008:administration & dosage*; D008297:Male; D009209:Myofascial Pain Syndromes / Q000188:drug therapy*; D011446:Prospective Studies
chemical_list: D000779:Anesthetics, Local; D002086:Butylscopolammonium Bromide; D008012:Lidocaine