PTCD will be operated under the X-ray PTC guide for the patient whose duct was not easily seen to decide its position.

• 对于超声显示导管不佳或位置不易确定,肝外胆道显示较差者,再在X线透视下作胆管造影术(PTC)行PTCD。结果:超声引导经皮经肝穿刺胆管1次性成功率达81。