病人,男,12岁。将一缝衣针放入尿道12h来诊。查体:尿道耻骨下曲处可触及一硬质长条样物,长约4cm,有触痛,与尿道方向一致。镜下血尿。X线片提示尿道内金属异物。用的卡因粘膜麻醉,尿道内注入4ml石蜡油,用一直径3mm前端圆钝的吸引器缓慢插入尿道,在手的导引下,将异物谨慎置入吸引器头腔内,取出一长 Patient, male, 12 years old. Will be a needle into the urethra 12h to diagnosis. Examination: urethral pubic subdural touches a hard strip samples, about 4cm, tenderness, consistent with the direction of the urethra. Microscopic hematuria. X-ray tips urinary tract metal foreign body. Use of caffeine mucosal anesthesia, urethral injection of 4ml of paraffin oil, with a diameter of 3mm front obtuse suction slowly inserted into the urethra, under the guidance of the hand, the foreign body cautiously into the suction head cavity, remove a long