Reliability of common knee injection sites with low-volume injections.
This study's purpose was to evaluate the reliability of knee injection sites with low-volume (2-3 cc) injection typical of viscosupplementation. This was a prospective study of 131 knees randomly assigned to 3 injection groups before to knee arthroscopy: SM-superomedial, superolateral, and lateral joint line (LJL). Needles were inserted to the hub, and aspiration was attempted before injection with 3 cc diluted methylene blue (MB). Injections then were graded at the time of arthroscopy as good, fair, or poor, depending on the intra-articular staining of MB. We conclude that a lateral joint line injection site may not be reliable for routine injections of low volumes into knees, because it results in good intra- articular delivery less than half of the time, with a high incidence of soft-tissue infiltration.
Wind
William M
WM
Department of Orthopaedic Surgery, Sports Medicine Institute, State University of New York at Buffalo, 14214, USA.
Smolinski
Robert J
RJ
D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D001182:Arthroscopy; D005260:Female; D006801:Humans; D007270:Injections, Intra-Articular / Q000592:standards*; D007719:Knee Joint; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D018709:Statistics, Nonparametric