| 摘要 |
Background: Given an equal pressure throughout the colon, the greatest tension
will occur in the portion of the colon with the largest radius. But in reality, some colons, even with small diameters, perforated. Aim: To find whether there is a correlation between the diameter and the pressure and tension of the
colon.Method: from May 1991 to Apr. 1996, 30 patients with acute obstruction of
colon caused by carcinomas had measurements of the diameter of cecum, and the
pressure of colon. Patients who had frank perforation, peritonitis, and poor
general condition were excluded. Result: The cecum were at least 7 cm in
diameter, and the pressures ranged from 2 to 26 mmHg. It was found that the
increase in diameter of the colon was not necessarily associated with the increase in pressure and tension. This may be due to faster obstruction, incompetence of the ileocecal valve, and presence of paralytic ileus in some patients. Conclusion: The pressure or tension of the colon does not vary directly with its diameter; perforation of the colon is independent of the diameter but dependent on the tension. |
