Document Detail


Longer Tc-99m-Mebrofenin Labeling-to-Administration Time Results in Scintigraphic Underestimation of Liver Function.
MedLine Citation:
PMID:  22064076     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
OBJECTIVE: : Tc-99m-mebrofenin clearance rate is used to estimate hepatocellular function. This investigation studied effect of labeling-to-administration (LTA) time of Tc-99m-mebrofenin and its liver clearance rate.
METHODS: : A total of 15 patients, age 46 ± 13 (range, 19-69) years, referred for routine gallbladder ejection fraction testing, were retrospectively studied. All had tests associated to normal liver, and no medical history of liver diseases was observed. Tc-99m-mebrofenin scintigraphic liver clearance (MSLC) rate was determined by the standard technique based on liver uptake rate. The radiopharmaceutical was prepared at an off-site central radiopharmacy. Linear regression was used to assess relationship of LTA time and MSLC.
RESULTS: : The LTA was 7.6 ± 2.0 (range, 4-12) hours. The labeling efficiency was 99.0% ± 1.33%. The MSLC rate was 11.9%/min ± 2.7%/min (range, 6.4-18.3). There was an inverse relationship of LTA and MSLC, expressed in the following equation: y = -0. 97x + 19.25 (R = 0.5076, P = 0.0028). The negative correlation with LTA remained when MSLC was corrected for body surface area (R = 0.4241, P = 0.0085).
CONCLUSION: : There is a significant underestimation of MSLC with increasing LTA time. If liver function assessment is the purpose of a hepatobiliary study, Tc-99m-mebrofenin should be administered as close to the time of radiopharmaceutical preparation as possible, preferably within 1 hour.
Authors:
Mark Tulchinsky; Thomas W Allen
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Clinical nuclear medicine     Volume:  36     ISSN:  1536-0229     ISO Abbreviation:  Clin Nucl Med     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-11-08     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7611109     Medline TA:  Clin Nucl Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1079-85     Citation Subset:  IM    
Affiliation:
From the Section of Nuclear Medicine, Department of Radiology, Milton S. Hershey Medical Center, Pennsylvania State University, Hershey, PA.
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