To reduce the injection velocity of contrast agent in the case of abdominal wall hernia following abdominal malignant tumor surgery, and to improve the success rate of examination without affecting the image quality.

A total of 73 patients with abdominal wall hernia following abdominal malignant tumor surgery who underwent enhanced abdominal CT in Beijing Chaoyang hospital from January 2018 to December 2019 were retrospectively included. They were divided into group A (n=32, with contrast agent injection velocity 3.0 ml/s) and group B (n=41, with contrast agent injection velocity 2.5 ml/s) according to the velocity of contrast agent injection. All patients received GE HD750 64-slice spiral CT (GE Discovery CT750HD Gem CT) for enhanced abdominal CT in supine position.

There was no statistical difference in image quality between group A and group B in subjective and objective evaluation. There was no statistical difference in the incidence of adverse reactions between group A and group B.

In patients with abdominal wall hernia following abdominal malignancy tumor surgery, enhanced abdominal CT with contrast injection velocity of 2.5 ml/s will not affect the image quality, can evaluate the primary lesion and, at the same time, the assessment of the situation of the hernial sac, while the incidence of adverse reactions did not have significant difference. However it can reduce the requirement of vascular conditions, and improve the success rate of examination.