Minimally-invasive fully ultrasound-guided removal of nonpalpable single-rod contraceptive implant: Case report and technical description

Minimally invasive removal of deep contraceptive implants under continuous ultrasound guidance is effective, quick, and safe

Objectives

The aim of this study was to assess the feasibility, performance, and complications of a non-surgical, minimally-invasive procedure of deep contraceptive implant removal under continuous ultrasound guidance.

Methods

The ultrasound-guided procedure consisted of local anesthesia using lidocaine chlorhydrate 1% (10 mg/mL) with a 21-G needle, followed by hydrodissection using NaCl 0.9% (9 mg/mL) and implant extraction using a Hartmann grasping microforceps. The parameters studied were the implant localization, success and complication rates, pain throughout the intervention, volumes of lidocaïne and NaCl used, duration of the procedure, and size of the incision. Between November 2019 and January 2021, 45 patients were referred to the musculoskeletal radiology department for ultrasound-guided removal of a deep contraceptive implant and were all retrospectively included.

Results

All implants were successfully removed en bloc (100%). The mean incision size was 2.7 ± 0.5 mm. The mean duration of the extraction procedure was 7.7 ± 6.3 min. There were no major complications (infection, nerve, or vessel damage). As a minor complication, 21 patients (46.7%) reported a benign superficial skin ecchymosis at the puncture site, spontaneously regressing in less than 1 week. The procedure was very well-tolerated, with low pain rating throughout (1.0 ± 1.5/10 during implant extraction).

Conclusions

Minimally invasive removal of deep contraceptive implants under continuous ultrasound guidance alone is feasible, effective, and safe. In the present cohort, all implants were successfully removed, whatever the location, with short procedural time, small incision size, low pain levels, and no significant complications. This procedure could become a gold standard in this indication.

Key Points

• Minimally invasive removal of deep contraceptive implants under continuous ultrasound guidance alone is feasible, which led to a success rate of 100% whatever the location (even close to neurovascular structures), with only a small skin incision (2.7 ± 0.5 mm).

• The procedure was safe, quick, without any major complications, and very well tolerated in terms of pain.

• This minimally invasive ultrasound-guided procedure could become the future gold standard for the removal of deep contraceptive implants, as an alternative to surgical extraction, even for implants in difficult locations such as subfascial ones or those close to neurovascular structures.

Supplementary Information

The online version contains supplementary material available at 10.1007/s00330-021-08263-4.

Locating Hormone-Releasing Contraceptive Implants Using Near-Infrared Light

BACKGROUND

Long-term hormone-releasing contraceptive (etonogestrel) implants are highly effective in preventing pregnancy. In a minority of patients, implants cannot be located by palpation, increasing the risk of complications related to removal. Ultrasonography can be used to locate migrated or deeply inserted implants, but this requires expertise. Thus, alternative methods to locate contraceptive implants are needed.

METHOD

Near-infrared light is sometimes used to facilitate venipuncture and has been described as a technique to locate implanted glucose sensors. Herein, I describe using near-infrared light to locate contraceptive implants. The near-infrared light was positioned perpendicularly and held 33 cm away from the arm. As soon as it is powered up, a reflection of the contraceptive implant is noticeable on the skin. The location of the implant is then marked before the removal procedure.

EXPERIENCE

This method allowed the easy location of nonpalpable etonogestrel implants in five women.

CONCLUSION

Near-infrared light was successful in locating nonpalpable etonogestrel implants. This novel method can be used as an alternative to ultrasonography.

Subfascial-located contraceptive devices requiring surgical removal

Background

Subdermal etonogestrel implants are highly effective contraceptive methods. Despite standardization of insertion technique by the manufacturer, some implants are inadvertently placed too deeply within or below the plane of the biceps brachii fascia. Placement of these implants in a deep tissue plane results in more difficult removal, which is not always possible in the office setting. In rare cases, surgical removal by an upper extremity surgeon is warranted.

Case presentation

Here we present 6 cases of etonogestrel implants located in a subfascial plane requiring removal by an upper extremity surgeon. Implants were all localized with plain radiography and ultrasound prior to surgical removal. All cases had implants located in the subfascial plane and one was identified intramuscularly. The average age was 28 years (19–33) and BMI was 24.0 kg/m^2 (19.1–36.5), with the most common reason for removal being irregular bleeding. The majority of cases (5/6) were performed under monitored anesthesia care with local anesthetic and one case utilized regional anesthesia. All implants were surgically removed without complication.

Conclusions

Insertion of etonogestrel contraceptive implants deep to the biceps brachii fascia is a rare, but dangerous complication. Removal of these implants is not always successful in the office setting and referral to an upper extremity surgeon is necessary to avoid damage to delicate neurovascular structures for safe removal.