Comparative study on the determinations of glomerular filtration rate by Gates method using single and double detector
Shao Ming-zh · China Medical Equipment · 2013
Objective:Glomerular filtration rate(GFR) is determined by the geometric mean method based on Gates method using dual detector with body thickness instead of kidney depth estimation for using single detector,which can eliminate the error of kidney depth estimation theoretically.The feasibility and accuracy of the geometric mean method were investigated by experiments in this study.Methods:Seventy six cases Community Health residents were selected as the research object.The GFRs(GFRdt,GFRPOST and GFRGM) were determined with two- sample method,Gates method using the post single detector and geometric mean method using double detectors respectively.The accuracy of GFRPOST and GFRGM was analysed and compared using GFRdt as the reference.Results:①Paired t test showed no significant differences between GFRPOST,GFRGM and GFRdt.②Both GFRdt and GFRPOST changed with GFRdt in linear trend.The correlation coefficients were 0.802 and 0.722 for GFRdt and GFRPOST.③The differences between GFRPOST,GFRGM and GFRdt were-0.5±12.0,3.0±13.9.Conclusion:The accuracy of the geometric mean method using double detectors is poorer than that of Gates method using the post single detector,which fails to eliminate the error of kidney depth estimation.