Corticosteroid therapy in regional small bowel ischaemia

Area of Science:

• Gastroenterology
• Pharmacology
• Surgical Research

Background:

• Pharmacological doses of corticosteroids are known to be effective in treating shock from severe intestinal ischemia.
• The impact of high-dose corticosteroids on mucosal microcirculation in regional small bowel ischemia requires further investigation.

Purpose of the Study:

• To analyze the effect of high-dose corticosteroids on mucosal exchange circulation in regional small bowel ischemia.
• To evaluate the efficacy and potential adverse effects of hydrocortisone in varying degrees of intestinal ischemia.

Main Methods:

• Animal models of moderate and severe regional small bowel ischemia were established.
• Animals were treated with hydrocortisone (100 mg/kg) at different time points and durations.
• Mucosal exchange circulation was assessed in the ischemic intestinal segments.

Main Results:

• No improvement in mucosal exchange circulation was observed in animals with moderate ischemia treated with 100 mg/kg hydrocortisone.
• Higher corticosteroid doses led to impaired mucosal circulation.
• Treatment with 100 mg/kg hydrocortisone for 3 days impaired mucosal circulation at 7 days post-ischemia.
• The same hydrocortisone regimen significantly increased mortality in rats with severe intestinal ischemia.

Conclusions:

• High-dose corticosteroid therapy may impair mucosal circulation and increase mortality in regional small bowel ischemia.
• A potential "steal syndrome" induced by corticosteroids, favoring healthy over ischemic tissue, is proposed as a mechanism.
• The use of pharmacological doses of corticosteroids in regional intestinal ischemia warrants careful consideration due to potential detrimental effects.