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2015 ; 16
(ä): 188
Nephropedia Template TP
gab.com Text
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English Wikipedia
Comparison of single CT scan assessment of bone mineral density, vascular
calcification and fat mass with standard clinical measurements in renal
transplant subjects: the ABC HeART study
#MMPMID26558994
Kinsella S
; Murphy K
; Breen M
; O'Neill S
; McLaughlin P
; Coyle J
; Bogue C
; O'Neill F
; Moore N
; McGarrigle A
; Molloy MG
; Maher MM
; Eustace JA
BMC Nephrol
2015[Nov]; 16
(ä): 188
PMID26558994
show ga
BACKGROUND: Despite limitations of routine methods, Clinical Practice Guidelines
support the assessment of bone mineral density (BMD) and vascular calcification
in renal transplant recipients. Changes in fat mass also occur
post-transplantation, although they are traditionally difficult to measure
accurately. We report the feasibility, convenience and accuracy of measuring the
above 3 parameters using a novel CT protocol. METHODS: We conducted a
cross-sectional study of 64 first renal allograft recipients (eGFR > 30
ml/min/1.73 m(2)). Quantitative CT (QCT) BMD analysis was conducted using CT
lumbar spine (GE Medical Systems Lightspeed VCT & Mindways QCT Pro Bone Mineral
Densitometry System Version 4.2.3) to calculate spinal volumetric BMD and
compared with standard DXA calculated areal BMD at the spine, hip and distal
forearm. Abdominal aortic calcification was assessed by semi-quantitative Aortic
Calcification Index (ACI) method and compared with lateral lumbar x-ray Kappuila
score and pulse wave velocity (PWV). Visceral and subcutaneous adipose tissue
volume (Osirix 16 Ver 3.7.1) was compared with BMI. RESULTS: Participants were 61
% male, had a mean age of 47 years, median ESKD duration of 5.4 years and a mean
eGFR of 54 ml/min. iDXA median T-score at proximal femur was -1.2 and at lumbar
spine was -0.2. Median QCT Trabecular T-score at lumbar spine was -1.2. The
percent of subjects with a T-score of < 2.5 by site and method was DXA Proximal
Femur: 7 %, DXA distal radius: 17 %, DXA spine: 9 %, QCT (American College of
Radiology cutoffs): 9 %. CT derived ACI correlated with PWV (r = 0.29, p = 0.02),
pulse wave pressure (r = 0.51, p < 0.001), QCT Trabecular (-0.31, p = 0.01) and
cortical volumetric BMD and history of cardiovascular events (Mann-Whitney U, p =
0.02). Both visceral and subcutaneous adipose tissue correlated with BMI (r =
0.63 & 0.64, p < 0.001). CONCLUSIONS: Single CT scan triple assessment of BMD,
vascular calcification and body composition is an efficient, accurate and
convenient method of risk factor monitoring post renal transplantation.