Methods
intraoperative bleeding
INTRAOPERATIVE BLEEDING, GESTATIONAL HYPERTENSION, COMPLICATIONS
A total of 94 women with gestational hypertension and risk of intraoperative bleeding undergoing cesarean section were identified and randomized into the subcutaneous nitroglycerin group and control group. The primary outcome was the success rate of left radial artery cannulation within 3 min after subcutaneous injecting (T2). The puncture time, number of attempts, the overall complications, and ultrasonographic measurements including radial artery diameter, cross-sectional area and depth were also recorded before subcutaneous injection (T1), 3 min after subcutaneous injection (T2) and immediately after radial artery cannulation (T3).