The blood stream begins to back again up. This will increase pressure inside the large vein, referred to as the portal vein, that carries blood towards the liver. This is called portal hypertension. 使用射频或激光能量的导管手术。该手术是较大静脉曲张最常使用的治疗方法。医疗护理专业人员将一根称为导管的细管放入扩张的静脉。然后用射频或激光能量加热导管末端。拔出导管时，高温会使静脉塌陷、闭... https://www.sgvascularctr.com/varicose-vein-treatment-in-singapore-comprehensive-advice-for-optimal-results/