Management of Live Insects in the External Auditory Canal: A Wilderness Perspective.

Abstract

A live insect within the external auditory canal is an unpleasant possibility during wilderness recreation. To our knowledge, no study has attempted to quantify the risk of this event occurring in the wilderness. However, such events anecdotally seem to occur with some regularity in a variety of climates. Most cases are benign, but a small subset of patients can develop complications including infection, hearing loss, and vestibular complaints related to the foreign body. In the emergency department or clinic, removal of the insect is a simple procedure in most circumstances; however, the material and expertise required for backcountry removal of the insect are often limited. With this consideration in mind, we offer a conservative approach to backcountry insect removal based on a selective review of the published literature on this topic. Where published data are lacking, we make recommendations based on anecdotal experience of the authors dealing with this condition in austere environments and in the emergency department. We recommend insect removal only if the patient is acutely symptomatic and the insect is visualized and graspable with the instrument used for removal. In any other circumstance, intervention should be deferred until definitive care is reached because of risks of complications associated with removal, including infection, bleeding, and tympanic membrane damage.