Ismail Hanan, Mansour Diana, Singh Madan
Central Family Planning Clinic, Norfolk and Norwich University Hospital, Norwich, UK.
J Fam Plann Reprod Health Care. 2006 Jul;32(3):157-9. doi: 10.1783/147118906777888413.
To determine whether or not migration of the Implanon rod does occur if correctly positioned and, if indeed migration does occur, to measure the degree of such migration.
A prospective study of 100 women who requested and had Implanon rods inserted by one fully trained health care professional holding the Faculty of Family Planning and Reproductive Health Care Letter of Competence in Subdermal Contraceptive Implant Techniques. Measurements were made from the insertion site to the distal end of the rods at 3 and 12 months post-insertion.
Of the 100 women studied, 95 were seen for follow-up at 3 months. There was no migration of Implanon in 58 (61%) patients. Of the remaining 37 (39%) patients where migration had occurred, 34 showed migration caudally and only three demonstrated cranial migration. With regard to the degree of migration, all but one case showed this to be less than 2 cm either cranially or caudally. At 1-year follow-up 87 patients were seen. No migration was noted in 39 (45%) patients. In the remaining 48 (55%) patients where migration had occurred, 44 showed migration caudally and only four demonstrated cranial migration, which in one case was over 2 cm. With regard to the degree of migration, all but one case showed this to be less than 2 cm either cranially or caudally. The measurement in the single case showing migration over 2 cm at 3 months remained the same at the 1-year follow-up.
These results show that up to 1 year after insertion of Implanon significant migration of the rod does not occur. The degree of migration noted in all cases except one was less than 2 cm. Where migration was noted, in the majority of cases this occurred caudally towards the insertion site. There were no cases of deep migration.
确定正确放置的依伴侬（Implanon）皮下埋植剂杆是否会发生移位，若确实发生移位，则测量其移位程度。
对100名要求并由一名持有计划生育与生殖健康护理学院皮下避孕埋植技术能力证书的经过充分培训的医护人员植入依伴侬皮下埋植剂杆的女性进行前瞻性研究。在植入后3个月和12个月时，测量从植入部位到埋植剂杆远端的距离。
在研究的100名女性中，95名在3个月时接受了随访。58名（61%）患者的依伴侬皮下埋植剂杆未发生移位。在其余37名（39%）发生移位的患者中，34名表现为向尾侧移位，仅3名表现为向头侧移位。关于移位程度，除1例之外，所有病例的移位在头侧或尾侧均小于2厘米。在1年随访时，87名患者接受了检查。39名（45%）患者未发现移位。在其余48名（55%）发生移位的患者中，44名表现为向尾侧移位，仅4名表现为向头侧移位，其中1例超过2厘米。关于移位程度，除1例之外，所有病例的移位在头侧或尾侧均小于2厘米。在3个月时显示移位超过2厘米的唯一病例，在1年随访时测量结果保持不变。
这些结果表明，依伴侬皮下埋植剂杆在植入后长达1年不会发生明显移位。除1例之外，所有病例的移位程度均小于2厘米。在发现有移位的病例中，大多数情况是向尾侧朝植入部位移位。没有深移位的病例。
