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Determination of peritoneal glucose kinetics in rats: implications for the peritoneal implantation of closed-loop insulin delivery systems.

Abstract：

:Peritoneal glucose kinetics were evaluated in the anaesthetized rat, to assess whether the peritoneal cavity would be a suitable site for the implantation of membrane-protected islets of Langerhans (bioartificial pancreas) or the glucose sensor of an artificial B cell. Glucose was measured in peritoneal fluid samples aspirated by needle puncture. Basal peritoneal and blood glucose concentrations were identical in 16 h fasted (n = 4) and non fasted (n = 3) animals. After 10 min of an i.v. glucose infusion (n = 15) the increment in peritoneal glucose concentration was 63 +/- 3% of the increment in blood glucose concentration and both values were significantly correlated (r = 0.92; p less than 0.001). After 10 min of glucose clamping (12.6 +/- 0.8 mmol/l), the increment in peritoneal glucose concentration was 69 +/- 3% (n = 5; p less than 0.05) of the increment in blood glucose concentration. In three additional experiments it was 93 +/- 3% of the increment in blood glucose concentration (NS), after 30 min of glucose clamping (8.0 +/- 0.5 mmol/l). Peritoneal glucose concentration monitored by a glucose sensor: (a) followed blood glucose sluggishly during a glucose clamp (n = 5), confirming the data shown above, (b) followed blood glucose with a 5 min delay and reached the same plateau after the intravenous injection of 1U insulin (n = 3; NS). We conclude that peritoneal glucose reflects blood glucose at basal state and during variations of glycaemia, nevertheless, presenting heterogeneous kinetics. These kinetics might be appropriate for a bioartificial pancreas but not for an in vivo calibration procedure, of a peritoneally implanted glucose sensor.

journal_name

Diabetologia

journal_title

Diabetologia

authors

Velho G,Froguel P,Reach G

doi

10.1007/BF00277254

subject

Has Abstract

pub_date

1989-06-01 00:00:00

pages

331-6

issue

6

eissn

0012-186X

issn

1432-0428

journal_volume

32

pub_type

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