Key result
Acetylcholine attenuated norepinephrine-induced pressure responses in canine tibia by 62%, an effect abolished by inhibiting prostaglandin and EDRF synthesis (p<0.0001).
Why the study?
Does acetylcholine infusion modify norepinephrine-induced perfusion pressure responses in canine tibia?
Population
Canine tibia perfused through the nutrient artery at a constant flow rate
Comparison
Acetylcholine infusion, with or without… vs Control conditions
Design
Preclinical
Authors
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Supports endothelial regulation of canine bone perfusion; leaves open translation to human orthopedic ischemia or healing.
Does acetylcholine infusion modify norepinephrine-induced perfusion pressure responses in canine tibia?
p-value: p=<0.0001
Intraosseous endothelial cells can regulate long bone blood flow by secreting vasodilator prostaglandins and EDRF.
Davis et al. (1992) studied this question. Acetylcholine infusion vs. Control conditions was evaluated on Increases in perfusion pressure caused by norepinephrine (p=<0.0001). Acetylcholine attenuated norepinephrine-induced pressure responses in canine tibia by 62%, an effect abolished by inhibiting prostaglandin and EDRF synthesis (p<0.0001).
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