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Combination of pancreas volume and HbA1c level predicts islet yield in patients undergoing total pancreatectomy and islet autotransplantation
Author(s) -
Nanno Yoshihide,
Wilhelm Joshua J.,
Heller David,
Schat Robben,
Freeman Martin L.,
Trikudanathan Guru,
Kirchner Varvara A.,
Pruett Timothy L.,
Beilman Gregory J.,
Hering Bernhard J.,
Bellin Melena D.
Publication year - 2020
Publication title -
clinical transplantation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.918
H-Index - 76
eISSN - 1399-0012
pISSN - 0902-0063
DOI - 10.1111/ctr.14008
Subject(s) - medicine , islet , pancreas , autotransplantation , pancreatectomy , urology , diabetes mellitus , endocrinology , gastroenterology , transplantation
Islet yield is an important predictor of acceptable glucose control after total pancreatectomy with islet autotransplantation (TP‐IAT). We assessed if pancreas volume calculated with preoperative MRI could assess islet yield and postoperative outcomes. We reviewed dynamic MRI studies from 154 adult TP‐IAT patients (2009‐2016), and associations between calculated volumes and digest islet equivalents (IEQs) were tested. In multivariate regression analysis, pancreas volume ( P < .001) and preoperative HbA1c levels ( P = .009) were independently associated with digest IEQs. The IEQ prediction formula was calculated according to each preoperative HbA1c level, (a) pancreas volume × 5800 for HbA1c ≥ 6.5, (b) pancreas volume × 10 000 for HbA1c ≥5.7/<6.5 and (iii) pancreas volume × 11 400 for HbA1c < 5.7. The formula was internally validated with 28 TP‐IAT patients between 2017 and 2018 ( r 2 = .657 and r 2 = .710 when restricted to 24 patients without prior pancreatectomy). An estimated IEQs/Body Weight (kg) ≥3700 predicted HbA1c ≤6.5 and insulin independence at 1 year after TP‐IAT with 77% and 88% sensitivity and 55% and 43% specificity, respectively. The combination of pancreas volume and preoperative HbA1c levels may be useful to estimate islet yield. Estimated IEQs were reasonably sensitive to predict acceptable glucose control at 1 year.