title: [Sciatic nerve block. Description of a new posterior approach in the gluteal area].
abstract: OBJECTIVE
  To describe and assess the clinical usefulness of a new posterior approach for sciatic nerve block to the gluteal zone.
  
  
  METHODS
  This prospective descriptive study of 40 adults undergoing lower limb surgery measured the difficulty, efficacy and success of the described sciatic nerve block.
  
  
  METHODS
  the patient was placed in Sim's position for a posterior approach. A line was then drawn from the upper part of the iliac spine to the sacral hiatus. From the midpoint of that line, a second line of equal length, perpendicular to the first and medial, was then drawn. The end of that line was the point of puncture. The needle was inserted perpendicular to all planes. Mepivacaine 1.5% (0.3 ml/kg) was injected.
  
  
  RESULTS
  The sciatic nerve was located upon the first attempt in 90% of the patients within 21.86 +/- 12.62 s. The block failed in 2.5%. Time taken to establish the block was 19.17 +/- 9.62 m. One transitory, mild complication occurred. No vascular puncture occurred.
  
  
  CONCLUSIONS
  We describe a new approach for sciatic nerve block using only two points of osseous reference identified by palpation. The level of efficacy and safety is high.
authors.affiliation: Servicio de Anestesiología, Reanimación y Terapéutica del Dolor, Fundación Sanitaria d'Igualada, Barcelona. mcasals@fsi.scs.es
authors.forename: M
authors.initials: M
authors.lastname: Casals Merchán
authors.forename: F
authors.initials: F
authors.lastname: Eshan
authors.forename: F
authors.initials: F
authors.lastname: Martínez Mañas
authors.forename: V
authors.initials: V
authors.lastname: Murga Marquínez
authors.forename: A
authors.initials: A
authors.lastname: Alonso Gómez
authors.forename: A
authors.initials: A
authors.lastname: Frascari Messina
authors.forename: J M
authors.initials: JM
authors.lastname: Soto Ejarque
authors.forename: F
authors.initials: F
authors.lastname: Vidal Prat
authors.forename: J M
authors.initials: JM
authors.lastname: Bausili Pons
mesh_terms: D002081:Buttocks; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009407:Nerve Block / Q000379:methods*; D011446:Prospective Studies; D012584:Sciatic Nerve