Abstract: ObjectiveTo explore the application of ultrasound to observe the thrombogenesis in the lower limb veins of cervical cancer patients after postoperative radiotherapy. MethodsA total of 94 cervical cancer patients diagnosed with thrombosis in the lower limbs after postoperative radiotherapy were selected as an experiment group, who were then divided into an acute thrombus group, a subacute thrombus group and a chronic thrombus group, according to the formation time of thrombus. Meanwhile, another 154 cervical cancer patients without thrombosis in the lower limbs after postoperative radiotherapy were enrolled as a control group. Both groups were compared for the internal diameter of the lower limb veins, intra-luminal echo signal and blood flow. ResultsThe acute thrombus group had a notably wider internal diameter in the diseased lower limb veins than the control group (P<0.05).No or low intra-luminal echo signal was found. According to color Doppler, no obvious blood flow signal or blood-flow filling defects were found. The subgroup thrombus group had a narrower internal diameter in the diseased lower limb veins, which however was not statistical different from those of the acute thrombus group. Low intra-luminal echo signal was strengthened, and blood flow was observed to various degrees. The chronic thrombus group showed remarkably decreases in the internal diameter of the diseased lower limb veins compared with the acute thrombus group (P<0.05), with obviously strengthened intra-luminal echo signal and orbital blood flow. ConclusionsUltrasound is useful to diagnose the thrombosis in the lower limbs of cervical cancer patients after postoperative radiotherapy, which can determine the location and type of thrombi, measure the internal diameter of diseased vessels and observe blood flow.