Transvaginal drain placement requested for pelvic abscess.Tvsono guided needle approach with sheathed needle performed.Difficult access due to height aka cranial level of collection and posterior anatomic location.First attempt with needle access failed as sheath popped out of the collection.Needle reinserted into sheath and access reattempted.Failure to gain access prompted exchange for the sheathed needle for a hard 18g trocar needle which was used to gain access and wire access allowed placement of transvaginal pelvic drain.Drain fell out on the inpatient floor the next day prompting of the pt and foreign body believed to be plastic piece of needle sheath identified.
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