Methods Dissection of the ophthalmic artery on dog, and retrogradecatheterization was done.
方法用犬做了眼动脉解剖，并做了眼动脉逆行插管注药实验。
2
When a urethral injury is suspected, a retrograde urethrogram should be completed before catheterization is performed.
当怀疑有尿道损伤，在行导尿术之前，应先行逆行尿道造影。
3
Methods: 90 renal colic patients received catheterization of ureter. They received KUB and retrograde pyelography at the same time. If calculus was found, They get ESWL immediately.