Johnson Travis Z, Annis Trevor, Kennedy Anne, Kobes Patrick, Mills Megan
Radiology, University of Utah School of Medicine, Salt Lake City, USA.
Radiology, University of Utah Hospital, Salt Lake City, USA.
Cureus. 2019 Jan 7;11(1):e3835. doi: 10.7759/cureus.3835.
Implantable forms of birth control have been used as a means for convenient and effective medication delivery. Nexplanon® (Merck Sharp & Dohme B.V., Haarlem, the Netherlands) is an implantable birth control device placed in the subcutaneous tissue of the upper medial arm during an in-office procedure. The location of the device is usually confirmed by palpation during a physical exam. In cases where the device is non-palpable, imaging may aid in localization. Implantable birth control devices have a characteristic radiologic appearance, and the location of the device can be confirmed by utilizing ultrasound and/or radiography. Occasionally, sonographic and radiographic studies may have equivocal results necessitating advanced imaging with computed tomography (CT) and/or magnetic resonance imaging (MRI). Subcutaneous location of the device is essential for efficacy and safety. An intramuscular position of the device is inappropriate and may lead to insufficient medication delivery and/or injury to the deep soft tissues. This case reviews the imaging features of a Nexplanon device which had been inappropriately placed into the muscle.
可植入式避孕方式已被用作一种方便且有效的药物递送手段。依伴依（Nexplanon®，默克雪兰诺有限公司，荷兰哈勒姆）是一种可植入式避孕装置，在门诊手术期间放置于上臂内侧的皮下组织中。该装置的位置通常在体格检查时通过触诊来确认。在该装置无法触诊到的情况下，影像学检查可能有助于定位。可植入式避孕装置具有特征性的放射学表现，通过超声和/或X线摄影可确认该装置的位置。偶尔，超声和X线摄影检查结果可能不明确，需要进行计算机断层扫描（CT）和/或磁共振成像（MRI）等高级影像学检查。该装置的皮下位置对于疗效和安全性至关重要。该装置处于肌肉内的位置不合适，可能会导致药物递送不足和/或深部软组织损伤。本病例回顾了一枚被不恰当地植入肌肉的依伴依装置的影像学特征。
