The Basic And Clinical Research Of Hyperpronation Treatment Radial Head Subluxation

Objective: according to anatomic research the infant elbow joint andclinical observation of hyperpronation and supination treatment radialhead subluxation, to explore the best reduction method of radial headsubluxation.Methods: Basic: thought choice of six human cadacer specimens, total 12embalmed cadsver's elbows.the radial head and neck, annular ligamentwere observed and measured. All of statistic was treated with SPSS13.0.Clinical: this study involved of children younger than 6years ofage with a clinical the first diagnosis of radial head subluxationpatients were randomized to undergo reduction by one of the two methodsabout supination and hyperpronation, followed every 5 minutes for checkof elbow function, the initial procedure was repeated if baselinefunctioning did not return 15 minutes after the initial reduction attempt.failure of that technique 30 minutes after the initial reduction attemptresulted in a cross-over to the alternate method of reduction. thealternate procedure was repeated if baseline functioning did notattempted. if the patient failed toth techniques, radiaography of theelbow was perforemed. at the same time, we will let patient' s familymembers used the modifle objective pain score to evaluated pain in thereduction processed.Results: Basic: the sagittal and transverse diameter of the radial headwere large than the diameters of the radial neck. ratio about 1.26±0.021 and 1.25±0. 016. the superior and inferior lengths of the annular ligamentwere approximately similar, ratio about 1.01±0.10.Clinical: a total of 76 patients were enrolled in the study.Demographic characteristics of each groph were similar. 39 of 39 patientsrandomized to hyperpronation were reduced successfully (100％) versus 29of 37 patients randomized to supination (78.4％).in the grouphyperpronation the assessment of pain about 4.17±1.35. in the groupsupination the assessment of pain about 7.05±1.60.Conclusions: in the reduction of radial head subluxations, thehyperpronation technique was successful more often than supination. sowe think the hyperpronation is best reduction method.