| Objectives:To compare the diagnostic value of high pressure injection constant speed with hand-pushing injection in hysterosalpingography in a prospective study.Materials and Methods:In a prospective trial,200 women who had been infertile for more than 1 year and were scheduled to undergo HSG, from the First Aff liated Hosptial of Guangzhou University Traditional Chinese Medcine and Central hospital of guang zhou Pan Yu, were assigned to one of two groups:those receiving high-pressure syringe (n=100), those receiving hand-pushing(n=100). Trial and control group in patients with unilateral oviduct 8 cases. Differences in clinical information among the two groups in age,pregnancies,disease course were not statistically significant (P> 0.05). Experimental group inject contrast material by high-pressure syringe, seting the minimum security pressure 100PSI (1PSI= 6.895kpa), injection rate of 0.4ml/S. Press status key, record the injection pressure and the actual amount of injected drugs. The control group by hand, injected 8ml for the first time, may increase the injection pressure by adding to the contrast agent 5-8ml, until patients unable to tolerate and the image display satisfactory. Two experienced radiologist diagnose the images, till achieving reunification. Inputing the data into a database, sorting data with X2test, two sample t-test comparison.Results:Experimental group 3 patients fail to intubation, n= 97,186 fallopian tubes. In the control group, n= 100,192 tubals. Test group and control group were 3.09%(3/97),1%(1/100) for uterine malformation rate, respectively; intrauterine adhesion rate was 11.34%(11/97),4%(4/100), no statistically significant between groups (P> 0.05). Two groups showed pathological tubal were 53.61%(52/97),46%(46/100). In the test group unilateral proximal or remote tubal occlusion hysterosalping-pressure, there were no statistically significant between the two groups (P> 0.05). There,were no statistically significant in bilateral proximal or remote blocking (P> 0.05). There were statistically significant in tubal patency.respectively 72.04%,62.50%(P <0.05); contrast material reflux were 17.52%(17/97),5%(5/100), there were statistically significant between the two groups (P<0.05). Proximal obstruction between two groups were 17.20%,11.98%respectively, there were no statistically significant between the two groups (P> 0.05). Remote blocking between two groups were 8.60%,12.50%respectively, there were statistically significant between the two groups (P<0.05). On average exposure time, the test group 9.19±3.07s, control group 13.05±4.12s, there were statistically significant between the two groups (P<0.05). The average total injection between the two groups was not statistically significant (P> 0.05).Conclusions:HSG applying constant pressure injection, the injection can maintain constant contrast agent, to quantify the uterine tubal perfusion pressure and help standardize operations, can improve the tubal patency rate, lower rate of distal tubal occlusion, and significantly reduced by in patients and doctors exposure time. This method is superior to traditional hand injection methods in diagnosis and treatment singnifcance, suitable for general promotion of clinical. Constant pressure injection method is relatively high rate of venous reflux, suggesting that this method and hysterosalpingography certain related venous reflux. The assessment of uterine tubal perfusion pressure of test group is not related with tubal obstruction location and morphological. Based on mean perfusion pressure of 97 patients in the experimental group, assuming that 99kpa is the best value high-pressure injection pressure.
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