Ear Foreign Body Removal

Anatomy and Physiology

The EAC is a funnel that transfers sound waves into the ear and is essential for hearing. The middle ear, which includes the tympanic membrane and the ossicles, helps bridge the impedance mismatch between air and the fluid-filled cochlea.

The EAC and the outer layer of the tympanic membrane develop from the 1st branchial cleft. The medial 2/3 of the EAC consists of bony tissue covered with stratified squamous epithelial skin, while the outer 1/3 comprises cartilage. The skin lining the cartilaginous portion of the EAC contains hairs and modified sweat glands that secrete cerumen.

The EAC is primarily innervated by cranial nerves V3 (mandibular branch of the trigeminal) and X (vagus), with a small branch known as the Arnold nerve playing a key role. This nerve can trigger coughing or gagging in some patients during procedures involving the EAC. Cranial nerves VII (facial) and IX (glossopharyngeal) also contribute to the EAC's innervation but to a lesser extent. Lesions at the skull base that affect the facial nerve, such as acoustic neuroma, may lead to hypesthesia (numbness) in parts of the EAC, a phenomenon known as the Hitzelberger sign.[11]

The EAC is nearly straight in young children and reaches approximately 2.5 cm in length around age 9, which is near the adult length. The EAC takes on a gentle sigmoid shape in adults. The cartilaginous portion angles posteriorly and superiorly, while the bony portion courses anteroinferiorly. This curvature pulls the helix posteriorly and straightens the EAC superiorly, which improves the visibility of the tympanic membrane in adults. Defects in the cartilaginous canal are known as the fissures of Santorini, which are susceptible to infection or malignancy.[12]

An important consideration when managing foreign bodies in the ear is that the EAC has 2 natural narrowings. The narrowest part of the EAC occurs at the junction of the bony and cartilaginous sections, known as the isthmus, which significantly influences both the removal of ear foreign bodies and the feasibility and ease of middle ear surgery.[13] The 2nd narrowing is lateral to the tympanic annulus, the fibrocartilaginous structure encircling the pars tensa.[14]

An anatomical feature of the EAC is a rare potential blind spot in the tympanic sulcus, created by the oblique slope of the tympanic membrane as it approaches the bulge of the temporomandibular joint. This region, known as the Fissures of Huschke (foramen tympanicum), represents a potential developmental defect in the anteroinferior bony EAC.[15] This anatomical variation is clinically significant when evaluating patients with transient otorrhea, particularly in the absence of a foreign body or other ear pathology.

The EAC functions as a sound resonator, with its length primarily determining the resonant frequency, while its curvature has minimal effect on auditory perception. Physical obstruction of the EAC by cerumen, fluid, or foreign bodies can impair hearing and disrupt sound localization.

Indications

Ear foreign bodies may present with symptoms that patients do not always describe fully, including ear pain, drainage, tinnitus, dizziness, or hearing loss. Prompt removal is indicated when history or clinical suspicion suggests a foreign body, particularly when the object is visualized in the EAC. The initial removal attempt should utilize optimal equipment and lighting, with consideration for patient cooperation or safe sedation or restraint as needed.[16] In many cases, a low threshold for otolaryngology consultation is recommended to maximize removal success while minimizing complications.

Contraindications

Otolaryngologists have no specific contraindications to removing foreign bodies from the ear, though limitations may arise based on the preferred setting, available equipment, and the need for sedation. Removing foreign bodies from the ear and evaluating any resulting damage are essential for appropriate treatment. Meanwhile, nonotolaryngologists have relative contraindications that include the following:

• The foreign body is ungraspable, tightly wedged, or adjacent to the tympanic membrane.
• The foreign body is sharp.
• Previous removal attempts were unsuccessful.[17]
• The patient is uncooperative.
• Equipment or lighting is insufficient for safe removal.
• The foreign body is composed of a spongy material that may swell when hydrated, making irrigation contraindicated.
• The tympanic membrane is perforated.
• Ear canal trauma is evident.
• Excessive bleeding occurs.
• Pus or abnormal drainage is observed.
• The foreign body is made of organic material.
• The foreign object warranting removal is a battery.
• A tumor or mass, such as cholesteatoma, is suspected.

Patients with these conditions should be referred to an otolaryngologist and treated with more appropriate equipment. Prompt recognition of these limitations is critical to achieve effective removal while preventing iatrogenic injury or infection.

Equipment

Various methods exist for removing foreign bodies from the EAC. The type, shape, and location of the object, as well as the patient's level of cooperation, determine which equipment is most appropriate to use. Common instruments frequently employed include an otoscope with a removable lens, nasal speculum, alligator forceps, cup forceps, right-angle hooks, Schuknecht foreign body suction tips, curved Rosen picks, and balloon catheters, such as those of the Fogarty type (see Image. Alligator Forceps). Binocular microscopy significantly enhances the use of precise and sharper instruments and is the preferred method among otolaryngologists.

Irrigation is a common option. This step may be performed by attaching an angiocatheter to a 20- to 30-mL syringe. Alternatively, a butterfly catheter may be modified by cutting off the needle and then attaching the remaining tubing to the syringe, which can also be effective. Great caution must be exercised with blind irrigation, as tympanic membrane perforation may be undetected initially. Some experts recommend against irrigating the EAC unless the tympanic membrane is completely visualized and its integrity is confirmed.

Suction is a viable and frequently used technique, typically performed with a Frazier tip under binocular microscopy. Irrigation may help by moistening the foreign material, allowing the suction tip to seal around the object and increase the extraction force. The combination of surgical loupes providing a minimum of 2.5-fold magnification with a headlight may serve as an adequate alternative.

Cyanoacrylate (superglue) or tissue adhesive may also be employed for extraction. The technique involves applying the adhesive to the blunt end of a cotton-tipped applicator, contacting the foreign body, and subsequently removing both the applicator and the object from the EAC.[18] Successful use of this method requires precise technique, adequate visualization, and patient cooperation.

In one study, 1st-pass success varied significantly among extraction approaches, ranging from 78.3% using forceps (alligator, bayonet, mosquito, or straight), the most commonly employed instrument, to 16.5% with a Katz extractor and 19.1% with cyanoacrylate applied via a cotton-tipped applicator. Saline irrigation, the 2nd most frequently employed technique, achieved a 65.2% 1st-pass success rate.

When otolaryngology consultation is required for difficult EAC foreign body removal, management decisions may depend on the need for sedation. These procedures are typically performed in an operating room equipped with specialized instruments, including a surgical microscope for otomicroscopy.

Personnel

Clinicians may remove foreign bodies from the EAC independently in cooperative patients. Depending on patient cooperation, 1 or more assistants may be required to maintain proper positioning and immobility during the procedure, a consideration particularly relevant in pediatric patients.[19] Local anesthesia is rarely used due to the complexity of EAC innervation. Procedural personnel may include an otolaryngologist, an anesthesiologist, nurses, and operating room staff if sedation is necessary. Referral to an audiologist and a speech-language pathologist may be warranted in cases of foreign body-related ear trauma.

Preparation

A thorough head and neck examination, including both ears and nares, must be performed to ensure that all foreign bodies are identified. The examining clinician should consider the possibility that an underlying illness may have prompted the patient to insert a foreign object into the ear to relieve discomfort, such as from pain or pruritus.[20] A foreign body is unlikely to be present if the patient experiences throat pain that may be referred to the ear.

Examination of the EAC should include identification of the foreign body, assessment for preexisting or iatrogenic tympanic membrane perforations and ear canal abrasions, and evaluation of hearing using tuning fork tests or, when available, formal audiometry. Preparation for removal should consider the type and characteristics of the foreign body, the patient’s level of cooperation, and appropriate positioning, whether sitting or lying down. In pediatric patients, positioning on a parent’s lap with the parent stabilizing the child’s head may facilitate safe extraction. During the final assessment, clinicians should determine whether otolaryngology consultation is warranted and whether general anesthesia may be required.[21][22]

Technique or Treatment

The physician should decide how many attempts will be made before starting the procedure, typically limited to 1 or 2. If more than 1 attempt is planned, the physician should determine which technique will be used for the subsequent attempt. Further attempts should not be pursued if the procedure remains unsuccessful after 1 or 2 tries, and the patient should be referred to an otolaryngologist. The opposite ear and nose must be checked for any foreign bodies, especially in pediatrics. A 2020 study found that 75% of foreign bodies in the EAC may be removed in outpatient settings or emergency departments, while 23% required removal in an operating room under general anesthesia.[23]

Specific Techniques

Various techniques are used for the removal of foreign bodies from the ear, each suited to different types of objects and patient needs. Each method also requires careful consideration of the patient's comfort and safety.

Manual instrumentation

Forceps, curettes, and angle hooks may be employed to manually extract foreign objects from the EAC, typically in conjunction with the operating head of an otoscope. However, these instruments may also be utilized with the diagnostic head. Binocular microscopy is the preferred option, although it may not be available in all settings. Otologic endoscopes may also be very helpful when used by trained professionals.

To visualize the object in the EAC, the pinna—the outer part of the ear—should be pulled back. If forceps are used, the foreign body should be grasped carefully and removed. Both curettes and right-angle hooks should be gently maneuvered behind the foreign object. Once positioned, the tool should be rotated so that the end is behind the object, allowing it to be scooped out effectively. In the case of a button battery or another metallic object, the use of a telescoping rod with a magnet tip—similar to the tools used by mechanics to retrieve dropped screws—can facilitate the removal of the foreign object from the EAC.[24]

Contact with the skin of the EAC must be minimized when using instruments, especially near the tympanic membrane, as this skin is highly sensitive, like the tympanic membrane itself. Utilizing an otologic speculum enhances visibility and lighting. The speculum is typically held with the nondominant hand, while the dominant hand operates the primary instrument.

Irrigation

This procedure may be performed using either an angiocatheter or a piece of tubing from a butterfly catheter. First, water should be warmed to body temperature. Then, the pinna should be gently retracted, and warm water should be squirted upward into the EAC, directing it behind the foreign body. This step should help wash the object out of the canal. Water that is too hot or too cold can cause nystagmus, vertigo, nausea, and vomiting due to vestibular stimulation.

Suction

The procedure should be carried out using a suction-tipped catheter equipped with a thumb-controlled release valve, such as a Frazier or Schuknecht foreign body suction tip. Under direct visualization, the suction tip should be pressed against the foreign body. The thumb hole should be occluded to create suction, and the object should be carefully removed, ensuring that suction is maintained until the foreign body is completely extracted from the EAC.

Cyanoacrylate application

A small amount of cyanoacrylate or skin glue is applied to the cotton end of a cotton-tipped applicator. A bit of cotton should be removed to reduce the tip size, which will enhance visibility before the adhesive is applied and the applicator is inserted into the EAC. Once the glue becomes tacky, the applicator should be carefully inserted into the EAC, with the sticky end placed against the foreign body while ensuring clear visualization. The applicator should be held in place until the glue dries. Once the object is firmly attached to the applicator, both the object and the applicator should be removed together. The skin of the ear canal should be avoided while inserting the cotton-tipped applicator to avoid glue adhering to the ear canal instead of the foreign body, resulting in further injury and swelling.

Arthropod removal

The initial step is to kill the arthropod, commonly a cockroach or a tick. This action helps the patient feel more comfortable and facilitates the removal of the animal. Research shows that mineral oil is the most effective agent for this purpose, followed by lidocaine, as both substances may be instilled into the EAC.[25] Once the arthropod is neutralized, it may be removed using any of the methods mentioned above. In practice, lidocaine is advantageous because it anesthetizes the EAC, allowing the patient to remain comfortable even if the animal struggles and scratches the sensitive skin.

Extraction of expanding superabsorbent beads

Superabsorbent polymer beads are pediatric toys that begin as small, hard, 1- to 2-mm spheres and can expand to 9 to 10 mm upon water absorption. When lodged in the EAC, these beads may exert pressure on the canal walls, compromising local blood flow. Delayed identification can result in soft tissue erosion and granulation tissue formation, which complicates visualization. These beads are typically radiolucent, limiting detection on plain radiography or computed tomography.

Manufacturer guidance recommends seeking immediate medical evaluation and, in some cases, applying alcohol with a cotton ball to reduce bead size. However, this measure carries a risk of middle ear toxicity if the tympanic membrane is perforated. Management includes maintaining dry ear precautions, avoiding otic drops to prevent further swelling or injury, and arranging urgent referral or transfer to otolaryngology if the foreign body cannot be safely extracted.[26]

Complications

The most frequent complications associated with EAC foreign bodies and their removal include skin excoriations and lacerations. Additional potential complications include bleeding, infection, retained foreign body fragments, tympanic membrane perforation, and, rarely, traumatic ossicular dislocations.[27][28]

Both preremoval and postremoval findings should be documented to identify any preexisting injuries. The EAC epithelium typically heals rapidly if kept clean and dry. Topical antibiotic and steroid therapy may be indicated for lacerations or bleeding. Prophylactic antibiotics, steroid eardrops, and routine otolaryngology follow-up are unnecessary in most cases of successful foreign body removal.[29]

Otolaryngology consultation is recommended when foreign body extraction from the EAC is unsuccessful, the clinician is uncomfortable performing the procedure, or the patient develops delayed symptoms such as pain, erythema, fever, or otorrhea. Not all complications are immediately apparent following foreign body retrieval.

Clinical Significance

Physicians involved in acute patient care will likely encounter patients with foreign bodies in the EAC at some point during their careers. Therefore, acknowledging the limitations of both clinician expertise and available equipment is essential. The type and location of the object within the EAC, as well as the patient's ability to cooperate, are crucial factors in deciding whether a removal attempt should be made. If the initial assessment suggests that removal is not feasible, the patient must be referred to a specialty clinic or a facility where sedation may be provided. Any complications that arise generally tend to be minor and easily managed.

Enhancing Healthcare Team Outcomes

Effective management of foreign bodies in the ear requires a collaborative healthcare team focused on delivering patient-centered care, improving outcomes, ensuring safety, and optimizing performance. This team includes physicians, physician assistants, nurses, nurse practitioners, urgent care and emergency room staff, operating room personnel, audiologists, and speech therapists. Each professional plays a vital role in this cooperative approach.

Healthcare providers must have the necessary clinical competencies and expertise to diagnose, evaluate, and treat this condition effectively. The required skills include proper patient positioning, the use of appropriate equipment, and recognition of potential complications. A strategic approach that incorporates evidence-based guidelines and individualized care plans tailored to each patient’s unique situation is essential.

Effective communication among team members is crucial. Physicians and nurses must swiftly identify potential ear trauma caused by foreign bodies that could result in hearing loss or vestibular dysfunction. Clear and open communication facilitates rapid diagnosis and treatment decisions, particularly concerning the need for otolaryngology, anesthesia involvement, and patient sedation in complex cases. Ensuring the availability of the proper equipment and adequate clinical training will help prevent errors and support a coordinated response.

Roles within the team are well-defined. Clinicians provide clinical expertise to diagnose and treat adverse events promptly, tailoring interventions to the patient’s specific needs. Nursing staff closely monitor patient and family anxiety, reporting any concerns immediately, including the need for patient restraint or sedation. Effective communication and collaboration within the team are fundamental to ensuring a swift and comprehensive response that minimizes patient harm and optimizes healing if ear trauma has occurred. This coordinated effort ensures that patient safety remains the top priority in the management of foreign bodies in the ear.