Systemic intravenous infusion of bovine hemoglobin significantly reduces microcirculatory dysfunction in experimentally induced pancreatitis in the rat.
OBJECTIVE
To evaluate the effectiveness of bovine hemoglobin on pancreatic microcirculation and outcome in experimental acute rodent pancreatitis.


BACKGROUND
Stasis of the pancreatic microcirculation initiates and aggravates acute pancreatitis. Hydroxyethyl-starch (HES) has been shown to improve pancreatic microcirculation. Similarly, bovine hemoglobin might improve rheology due to its colloid effect, but additionally supplies oxygen to oxygen depleted pancreatic tissue.


METHODS
In Wistar rats, severe acute pancreatitis was induced by administration of glucodeoxycholic acid i.d. and cerulein i.v. Pancreatic microcirculation was continuously monitored by fluorescence microscopy. Fifteen minutes after the initiation of acute pancreatitis, animals received either 0.8 mL bovine hemoglobin (Oxyglobin), HES, or 2.4 mL 0.9% NaCl i.v. at random. After 6 hours, animals were killed and histopathological damage of the pancreas was assessed using a validated histology score (0-16).


RESULTS
In comparison to controls, pancreatic microcirculation improved significantly in the HBOC group (mean difference of capillary density 31.4%; standard error 5.6%; P < 0.001; 95% confidence interval for difference 17.5-45.3). HES was not as effective as HBOC substitution. The histology score revealed less tissue damage in the HBOC group [6.25 vs. 9.25 (3-8.5 vs. 8-10.75, P < 0.001)] in comparison to controls and also in comparison to the HES group [6.25 vs. 8 (3-8.5 vs. 6.5-10.25, P < 0.006)].


CONCLUSIONS
In severe acute pancreatitis, single i.v. injection of bovine hemoglobin improves pancreatic microcirculation and reduces tissue damage.
Strate
Tim
T
Department of General Surgery, University Hospital Eppendorf, Martinistrasse 52, D-20246 Hamburg, Germany.
Mann
Oliver
O
Kleinhans
Helge
H
Schneider
Claus
C
Knoefel
Wolfram T
WT
Yekebas
Emre
E
Standl
Thomas
T
Bloechle
Christian
C
Izbicki
Jakob R
JR
D000208:Acute Disease; D000818:Animals; D001802:Blood Substitutes / Q000008:administration & dosage*; D005260:Female; D006400:Hematocrit; D006454:Hemoglobins / Q000008:administration & dosage*; D007262:Infusions, Intravenous; D007962:Leukocytes / Q000502:physiology; D008833:Microcirculation; D008856:Microscopy, Fluorescence; D010179:Pancreas / Q000098:blood supply* / Q000473:pathology; D010195:Pancreatitis / Q000503:physiopathology*; D011897:Random Allocation; D051381:Rats; D017208:Rats, Wistar; D013450:Sulfones / Q000008:administration & dosage*
D001802:Blood Substitutes; D006454:Hemoglobins; D013450:Sulfones; C081606:bovine hemoglobin-divinyl sulfone