Estimation of donor usability for islet isolation with the modified Ricordi method.
BACKGROUND
The quality of donor pancreata is important for successful islet isolation. However, in some countries like Japan, the number of donor pancreata is low. Therefore, marginal donor pancreata have been used with less restrictive donor criteria. In order to use marginal donor pancreata, we established the modified Ricordi method. According to the United Network for Organ Sharing (UNOS) in 2005, more than 6000 pancreata were not clinically usable in the United States. In this study, we reevaluated donor usability based on the Japanese islet donor criteria.


METHODS
We reviewed donor charts with well-documented cases in Texas from 2005 to 2006. We counted the number of pancreata for pancreas transplantation or islet transplantation. If not used clinically, the reason was also reviewed. Donors were reevaluated based on the Japanese islet donor criteria.


RESULTS
We reviewed 236 donor charts, including 29 pancreata used for whole pancreas transplantations and 13 for islet isolation; therefore, 194 pancreata were not used. Among the 194 cases, we were able to identify the reasons that the pancreata were not used in 186 cases. When we applied the Japanese acceptance criteria, an additional 82 of 186 cases (44%) seemed suitable for islet isolations.


CONCLUSIONS
With the modified Ricordi method, more than 2500 donor pancreata might be used for islet isolation in the United States when the Japanese criteria are applied.
Matsumoto
S
S
Baylor All Saints Medical Center/Baylor Research Institute, Fort Worth, Texas 76104, USA. shinichi41@mac.com
Noguchi
H
H
Hatanaka
N
N
Kobayashi
N
N
Jackson
A
A
Naziruddin
B
B
Levy
M F
MF
D000328:Adult; D000368:Aged; D002470:Cell Survival; D003922:Diabetes Mellitus, Type 1 / Q000601:surgery; D006801:Humans; D007515:Islets of Langerhans / Q000166:cytology*; D016381:Islets of Langerhans Transplantation; D007564:Japan; D007902:Length of Stay; D008875:Middle Aged; D009926:Organ Preservation; D016035:Pancreas Transplantation; D010183:Pancreatic Ducts; D018579:Patient Selection; D012189:Retrospective Studies; D014019:Tissue Donors