title: Comparison of sonographically guided intra-articular injections at 3 different sites of the knee.
abstract: OBJECTIVE
  Sonographically guided injections show more accuracy than blind injections, but there are no reports comparing sonographically guided intra-articular injection approaches. This study examined the accuracy of sonographically guided intra-articular injections at 3 different sites of the knee using medial, midlateral, and superolateral portals.
  
  
  METHODS
  Sonographically guided intra-articular injections and radiology evaluations were performed on 126 knees with osteoarthritis (Kellgren-Lawrence grade 2 or 3). Six milliliters of mixed material containing 1% lidocaine (1 mL), 20 mg of triamcinolone (1 mL), and a nonionic contrast agent (4 mL) was injected into the intra-articular space of the knee through the medial, midlateral, and superolateral portals. After the sonographically guided intra-articular injection into the knee joint, a radiographic image was taken to determine whether the injected material had reached the intra-articular space or infiltrated into the soft tissue.
  
  
  RESULTS
  Sonographically guided intra-articular injections in the midlateral portal (95%; P < .05) and superolateral portal (100%; P < .05) showed significantly higher accuracy than injections in the medial portal (75%).
  
  
  CONCLUSIONS
  Sonographically guided intra-articular injections in the midlateral or superolateral portal may increase the accuracy of knee joint injections.
authors: Department of Physical Medicine and Rehabilitation, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea.
authors: Yongbum
authors: Y
authors: Park
authors: Sang Chul
authors: SC
authors: Lee
authors: Hee-Seung
authors: HS
authors: Nam
authors: Jihae
authors: J
authors: Lee
authors: Sang Hyun
authors: SH
authors: Nam
mesh_terms: D000305:Adrenal Cortex Hormones / Q000008:administration & dosage*; D000368:Aged; D000893:Anti-Inflammatory Agents / Q000008:administration & dosage; D005260:Female; D006801:Humans; D007270:Injections, Intra-Articular / Q000379:methods*; D007719:Knee Joint / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000000981:diagnostic imaging* / Q000188:drug therapy*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D016896:Treatment Outcome; D018084:Ultrasonography, Interventional / Q000379:methods*
chemical_list: D000305:Adrenal Cortex Hormones; D000893:Anti-Inflammatory Agents