Methods: Access recirculation was assayed by both urea test (UT) and GIT in 82 hemodialysis patients, and 17 patients were also examined by Doppler ultrosonics method.

• 方法:对82例维持性血透患者的血管通路采用尿素法(UT)和GIT两种方法进行再循环率测定,进行自身对照。