Otolaryngologic Procedures
Pharynx and Larynx
Anatomy
The larynx in adults is located in the anterior part of the neck at the level of the C3-C6 vertebrae. It connects the inferior portion of the pharynx (hypopharynx) with the trachea. The larynx extends vertically from the tip of the epiglottis to the inferior border of the cricoid cartilage. It consists of nine cartilages. The larynx is innervated by branches of the vagus nerve, the superior laryngeal nerve, and the recurrent laryngeal nerve. The relevant anatomy is depicted in Figure 63-1.
Figure 63-1 A, Anatomy of the oropharynx. B, Sagittal section of the neck. (Netter illustration from www.netterimages.com. © Elsevier, Inc. All rights reserved.)
Indications and Contraindications
Laryngoscopy is indicated for the evaluation of patients with complaints of dysphagia or odynophagia. More specifically, it should be performed in patients complaining of dysphagia, hoarseness, FB ingestion or sensation in the throat, and angioedema and in patients who require assessment of their airway status. In general, laryngoscopy can be used to evaluate a problem and to exclude airway compromise, as well as to diagnose several other diseases such as gastroesophageal reflux, cancer, and allergy.1
Equipment
The equipment required depends on the type of laryngoscopic procedure performed. For flexible laryngoscopy you will need a standard flexible nasopharyngolaryngoscope, a light source, gloves, a nasal speculum, surgical lubricant, antifogging solution, decongestant spray, anesthetic spray, and a wall suction setup with a Frazier suction tip catheter (Fig. 63-2, plate 1). Many choices of decongestant are available; however, 0.05% oxymetazoline (Afrin) or 0.1% to 1% phenylephrine is commonly used. Lidocaine (4%) is typically used as the anesthetic. A 5% cocaine solution serves as both an anesthetic and decongestant. If nasal spray formulations are not available, medication-soaked cotton pledgets, an atomizer bottle, or a syringe atomizer (Mucosal Atomization Device, MAD Nasal, Wolf Torry Medical, Inc.) may be used.
Figure 63-2 Flexible laryngoscopy.
Procedure
Attach the nasopharyngolaryngoscope to its light source and the suction tubing to its port (if available). Ensure that both are functioning properly before beginning. Before inserting the scope, adjust the eyepiece to your visual acuity; it is helpful to check the focus on newsprint or a small object. Review the scope’s directional controls. Examine both nares and choose the more patent one to enter. Anesthetize and vasoconstrict the naris (see Fig. 63-2, plate 2). Because this procedure is irritating, allow enough time for these medications to become effective. You may also anesthetize the pharynx to minimize gagging (see Fig. 63-2, plate 3). Warm the end of the scope in warm water to help prevent fogging. Place the patient in the seated position with the head placed against a head rest in the sniffing position. Insert the tip of the lubricated scope just inside the naris. (Some authors recommend a series of soft nasal trumpets to gradually dilate the nasal cavity and allow easier passage of the scope.) Movement of the scope against the inside of the nasal passage may be irritating to the patient. Minimize this sensation by resting your fourth and fifth fingers on the bridge of the patient’s nose while stabilizing and guiding the scope between your thumb and index finger (see Fig. 63-2, plate 4).
While looking through the eyepiece, slowly advance the endoscope past the middle turbinate into the nasopharynx or through the lumen of a nasal trumpet. To clear fogging or mucus off the lens, ask the patient to swallow, wipe the lens against the pharyngeal mucosa, or use the suction. Once the scope is in the nasopharynx, direct the tip inferiorly by using the thumb control near the eyepiece. Use the thumb control to accomplish up and down movements of the scope. Rotate the scope about its axis and then apply thumb control to provide lateral movement and visualization. At this point the base of the tongue and the tonsils will come into view. Slide the scope farther caudad to bring the larynx into focus. Once again, systematically view the patient’s anatomy and function during both respiration and phonation (see Fig. 63-2, plate 6).
If the nasopharyngeal scope will not pass through either naris, pass it through the oropharynx. Properly anesthetize the oropharynx and avoid contacting the posterior portion of the tongue to prevent gagging. A plastic bite block can be used. Alternatively, cut a 10-mL syringe (without the plunger) in half and ask the patient to hold it in the mouth between the incisors (see Fig. 63-2, plate 5). Pass the fragile endoscope through this tube into the oropharynx to prevent accidental biting of the scope.
Mirror Laryngoscopy
Establish rapport with the patient by explaining how the examination will be performed. Have the patient sit erect in the “sniffing position” with the feet flat on the floor and leaning slightly forward. Attach your head lamp and adjust the beam of light (Fig. 63-3). Warm the mirror with warm water to prevent fogging, but check the temperature of the mirror with your hand before placing it into the oropharynx so that the patient is not burned. Alternatively, apply an antifogging solution to the mirrored side. Wrap the patient’s tongue with gauze to prevent it from slipping or being injured by the lower incisors and then grasp it with the nondominant hand (Fig. 63-4). Apply gentle traction on the tongue with your thumb and index finger and lift the patient’s upper lip with your middle finger. Slide the mirror into the oropharynx with the glass surface parallel to the tongue but not touching it. Place the back of the mirror against the uvula and soft palate and smoothly lift until the larynx is visualized. Although this should not induce gagging, try to make only slight changes in the mirror’s position to inspect the appropriate structures.
Once the patient is anesthetized, repeat the steps described earlier and position the mirror against the soft palate. Rotate the angle of the mirror and systematically inspect the base of the tongue, valleculae, epiglottis, piriform recess, arytenoids, false and true vocal cords, and if possible, the superior aspect of the trachea (see Fig. 63-2, plate 6). Observe for masses, evidence of infection, asymmetry, or FBs. Further evaluate the anterior structure of the larynx and function of the vocal cords by having the patient say “eeee” in a high-pitched voice. This should move the epiglottis away from blocking the view of the larynx and bring the true cords together at the midline (Fig. 63-5).
Tonsil: PTA
Anatomy
Understanding the relative anatomy before attempting to treat PTA is important (Fig. 63-6). The palatine tonsils are located between the anterior and posterior pillars of the throat, bound in a capsule, and covered by mucosa. The lateral wall of the tonsil is defined by the superior pharyngeal constrictor muscle. Of great importance is the internal carotid artery, which lies approximately 2.5 cm posterolateral to the tonsil.
The abscess is defined as a collection of pus between the tonsillar capsule, the superior constrictor muscle, and the palatopharyngeus muscle (Fig. 63-7). The abscess is not within the tonsil itself. PTA is believed to arise from spread of infection from the tonsil or from the mucous glands of Weber located in the superior tonsillar pole. The abscess is most commonly initiated from the upper pole of the tonsil. However, it can also spread from the middle or inferior poles.
Pathophysiology and Clinical Findings
PTAs can occur in patients with inadequately treated tonsillitis and in those with recurrent tonsillitis, but in some patients it arises de novo. There are no data proving that antibiotics, even the correct ones in proper doses, invariably prevent the progression of tonsillitis to abscess formation. The abscess is generally unilateral, and bilateral involvement is rare.2
The differential diagnosis for this acute process includes unilateral tonsillitis, peritonsillar cellulitis, retropharyngeal abscess, infectious mononucleosis, epiglottitis, herpes simplex tonsillitis, retromolar abscess, neoplasm, FB, and internal carotid artery aneurysm. Chronic conditions include leukemia, carcinoma, and tumor in the parapharyngeal space. Differentiation of PTA from peritonsillar cellulitis may be difficult, especially in the early stages of an abscess. The history and time course of the two disease processes are quite similar. Trismus and uvular deviation are uncommon with peritonsillar cellulitis.3
Indications and Contraindications
To diagnose PTA, in addition to visualization, place a gloved index finger into the mouth to feel for hardness or fluctuance in the peritonsillar region (Fig. 63-8).
Intraoral sonography may augment diagnostic accuracy and direct localization for drainage (Fig. 63-9; see Chapter 37). It is performed with an intracavitary probe. Blaivis and coworkers2 found that ED ultrasound was effective in diagnosing and aiding drainage in five cases of PTA. Ultrasound excluded the diagnosis in one. If there is still a question regarding the diagnosis or actual location of the abscess, computed tomography (CT) may be helpful but is not regularly performed and is not standard before a drainage procedure in straightforward cases.
Equipment
The equipment required depends on the technique that is going to be used to drain the PTA. For needle aspiration, you will need a light source, tongue blade, injectable (1% lidocaine with 1 : 100,000 epinephrine) or topical (Cetacaine spray or 4% lidocaine) anesthetic, 3- to 5-mL syringe with a long 25-gauge needle for injection of anesthetic, and a standard or long 18- to 20-gauge needle (spinal needle) on a 10-mL syringe for aspiration (see Review Box 63-1). Long needles and small syringes will not obscure the operator’s view of the anatomy. It is also helpful to have wall suction with a Frazier or Yankauer suction tip device available.
For either procedure, the patient should be given intravenous pain medication and may require mild sedation or even procedural sedation. One should administer parenteral narcotic analgesia, mild sedation, or both, before attempting aspiration. Fentanyl, 1 to 3 µg/kg administered intravenously a few minutes before the procedure, is often ideal. Midazolam may be used judiciously, but the patient should not be overly sedated. The combination of midazolam, ketamine, and glycopyrrolate is reported to be safe and effective for outpatient peritonsillar drainage in children.4
Procedure
Needle aspiration is relatively simple, can be performed by emergency clinicians, does not require special equipment, and is relatively inexpensive. Other benefits of needle aspiration over incision and drainage include decreased pain and trauma. Many believe that this should be the initial surgical drainage procedure for adults and children. The recurrence rate after aspiration is 10%,3 and its cure rate is 93% to 95%.5 Approximately 4% to 10% of patients require repeated aspiration.3,5,6 One drawback is that needle aspiration may miss the PTA and therefore allow misdiagnosis as peritonsillar cellulitis. For this reason, some authors propose admission of patients with negative aspirations and the presumed diagnosis of peritonsillar cellulitis for intravenous antibiotics and observation to prevent further morbidity. Although most studies involved hospitalization and intravenous antibiotics, selected outpatient treatment with oral antibiotics has also been successful and is usually the option chosen unless the patient appears to be in a septic state.6
The incision and drainage procedure is commonly done on an outpatient basis under local anesthesia. It is usually performed after pus is obtained by needle aspiration, but occasionally it is the primary procedure. It seems most logical to first attempt aspiration and follow with incision and drainage only if additional pus is suspected or other extenuating circumstances are present. The success rare for incision and drainage is high with a recurrence rate similar to or lower than that with aspiration alone.5
Treatment guidelines based on a review of the literature3,5–7 suggest that patients with PTA should initially be treated by needle aspiration. Incision and drainage and immediate tonsillectomy should be reserved for treatment failures or recurrences. These procedures can be performed in conjunction with hospital admission and administration of intravenous antibiotics or as outpatient treatment with oral antibiotics. One evidence-based review analyzed 42 articles, 5 of which were clinical studies on surgical technique.5 All three techniques were found to be effective in treating PTA, and the recurrence rate was low (grade C recommendation). The approach depends on the patient’s clinical status and medical history. Decisions about the treatment of PTA in the ED are often made by the emergency clinician, but as local protocols dictate, consultation with an otolaryngologist is also appropriate.
Needle Aspiration
Have the patient sit upright with a support behind the head. This is best done as a two-person procedure. Ask an assistant to retract the cheek laterally to maximize visibility. A head lamp provides optimal lighting; a double–tongue blade setup aids in visualization of the operative area (see Fig. 63-3). If required, administer a parenteral narcotic analgesic, a mild sedative, or both before attempting aspiration.
Use manual palpation to locate the fluctuant area of the abscess. Anesthetize the area topically or with local infiltration. Infiltration should be done with 2 to 3 mL of 1% lidocaine with epinephrine via a 25- to 27-gauge needle. Use a 3- to 5-mL syringe with a long needle to be able to visualize the area to be injected (Fig. 63-10, step 1). A large syringe can block the operator’s view. Displacing the tongue with a finger rather than a tongue blade may provide a better view. Infiltrate the lidocaine intramucosally for the best results, but be careful to not increase the size of the abscess by direct injection into the abscess cavity. The area should blanch. With proper local infiltration, the patient will not feel the penetration of the aspirating needle. If the trismus is so pronounced that it prevents adequate anesthesia, it will probably be too difficult to aspirate or incise the abscess properly.
Novel techniques to assist in the drainage procedure have recently been described. Afarian and Lin described the use of a laryngoscope with a curved blade (Fig. 63-11A and B).8 The blade is inserted into the patient’s mouth as far posteriorly as the patient can tolerate. The blade shines light from inside the mouth onto the posterior aspect of the pharynx. In addition, the laryngoscope provides better exposure of the area because the handle is below the patient’s mouth and the holding hand does not obscure the view. Moreover, the curved blade sweeps the tongue out of the way and the weight of the handle will help overcome trismus. Braude and Shalit described a similar process involving the use of a disassembled disposable vaginal speculum with a fiberoptic light (see Fig 63-11C).9 One advantage of both techniques is that an assistant can hold either light source without getting in the way of the operator. Finally, Chang and Hamilton reported that performing the procedure with the patient in the Trendelenburg position and the operator seated behind the patient’s head provides comparable success rates and patient comfort.10
For aspiration, attach a long 18- to 20-gauge needle to a 10-mL syringe. Fashion a needle guard by cutting off the distal 1 cm of the plastic needle cover, replace the cover on the needle, and securely attach this guard to the needle and syringe with tape to prevent inadvertent displacement (see Fig. 63-10, step 2). Ensure that the needle protrudes only 1 cm beyond the cover to limit the depth of needle penetration and lessen the risk of entering any major vascular structures. If pus is not obtained at a 1-cm depth, deeper penetration is discouraged. Insert the needle into the most fluctuant (or prominent) area as previously determined, which is most commonly the superior pole of the tonsil (see Fig. 63-10, step 3). Importantly, advance the syringe and needle in the sagittal plane only; do not angle to the side toward the carotid artery. Do not aspirate the tonsil itself because the abscess develops in the peritonsillar space surrounding the tonsil. Continually aspirate while advancing the needle in the sagittal plane and do not direct it laterally, where it could injure the carotid artery. If the aspirate is positive for pus, remove as much purulent material as possible. If the aspirate is negative, attempt aspiration again in the middle pole of the peritonsillar space, approximately 1 cm caudal to the first aspiration. If still negative, perform a third and final attempt at the inferior pole (see Fig. 63-10, step 4). Up to 30% of abscesses will be missed if only the superior pole is aspirated. It must be stressed that a negative aspirate does not rule out a PTA.
Usually, 2 to 6 mL of pus is obtained. It is unusual to recover more than 8 to 10 mL (Fig. 63-10, step 5). Although culture is recommended, the results rarely alter subsequent therapy. When significant amounts of pus are aspirated, the patient usually feels immediate improvement in pain and dysphagia. After the needle is removed, some bleeding will be noted (see Fig. 63-10, step 6). Slight oozing may occur for a few hours, especially if warm water rinses are used. Drainage of pus may continue and is often sensed as a foul taste by the patient. Significant additional drainage of pus may be an indication for repeated aspiration, incision and drainage, or hospital admission.
Recently, a new device, the Reciprocating Procedure Device (RPD; AVANCA Medical Devices, Inc.), has been developed that allows one-handed aspiration of the abscess (Fig. 63-12).11 The RPD consists of two syringe barrels and plungers. The plungers are linked by a pulley system in opposing fashion, which results in a set of reciprocating plungers. When one plunger is pressed with the thumb, the syringe injects; when the accessory plunger is depressed, the syringe aspirates. The RPD allows stable finger positioning and finer control of the needle and syringe. To use the RPD, attach a needle to the RPD. Press the injection plunger with the thumb while advancing the RPD simultaneously in the oral cavity until the needle penetrates the abscess. Once the mucosal surface has been penetrated, depress the aspiration plunger to provide a vacuum for aspiration without moving the needle tip. Studies have shown that the RPD allows enhanced needle control, safer and more accurate aspiration procedures, and decreased complications by 35% to 60%.12–14
Incision and Drainage
To incise a PTA, anesthetize the area as described earlier. Prepare a No. 11 or 15 scalpel blade by taping over all but the distal 0.5 cm of the blade to prevent deeper penetration (Fig. 63-13, step 1). Incise the area of maximal fluctuance or the area where a preceding aspiration (if one was performed) located pus. Do not incise the tonsil itself; instead, incise the peritonsillar area where pus accumulates. Incise the mucosa in an area 0.5 cm long in a posterior-to-anterior direction. A stab incision with a No. 11 blade usually suffices (see Fig. 63-13, step 2). Warn the patient that the pus will flow posteriorly and must be expectorated. Expect bleeding because this is a vascular area. Suction the incised area with a No. 9 or 10 Frazier suction tip or a tonsil suction tip to aid in removal of the purulent material. Place a closed Kelly clamp into the opening and gently open it to break up the loculations (see Fig. 63-13, step 3). Allow the patient to rinse and gargle with a saline or dilute peroxide-saline solution. Packing is not used in the drainage of this abscess. After aspiration or incision, it is prudent to observe the patient for about an hour to watch for complications (e.g., bleeding) and to ensure that the patient is able to tolerate oral fluids. Most patients can be discharged with 24-hour follow-up. Toxic patients, those with excessive volumes of aspirate, those with persistent bleeding, and those unable to take oral antibiotics are candidates for admission or more prolonged observation. Frequent rinses with warm saline are quite helpful in relieving postaspiration symptoms.
Complications of Surgical Drainage
Needle aspiration is an accepted, safe, and effective technique for treatment of PTA in the ED. There is an approximate 10% failure rate and need for subsequent drainage.3,5,6 Complications can include aspiration of pus or blood and hemorrhage. If the patient has cellulitis, the aspiration will be of no help, but it will not worsen morbidity. Failure to obtain pus should prompt high-dose antibiotics and follow-up in 24 hours. Many clinicians will opt for admission in such instances. Though often feared, injury to the carotid artery has not been reported as a complication of needle aspiration of PTA. Catastrophic hemorrhage may result from the extremely rare and largely theoretical aspiration of a pseudoaneurysm mimicking a PTA or similarly rare necrosis of the carotid artery. In addition, incisions that are too large or too small may lead to poor healing or an inability to completely evacuate the abscess, respectively.
Ear
The ear consists of three sections, the outer, middle, and inner ear. The outer ear includes the pinna (auricle), the external auditory canal (EAC), and the tympanic membrane (TM) (Fig. 63-14A). For the purpose of this chapter, only the parts of the external ear will be discussed. The pinna is flesh-covered cartilage and serves both hearing and cosmetic functions. The EAC extends from the head to the external auditory meatus in the skull and measures approximately 2.5 cm in adults. It is relatively short and straight in early infancy but begins to take on its adult S shape and overall anterocaudal orientation at 2 years of age. Initially, the EAC is almost entirely cartilaginous, but by adulthood its medial two thirds is composed of bony support with an overlying thin, stratified squamous epithelium. The lateral third has a less sensitive, thicker hairy epithelium that produces cerumen and retains its cartilage as support. The arterial supply to the EAC originates from the external carotid artery via the posterior auricular, maxillary, and superficial temporal branches. The mandibular branch of the fifth cranial nerve (V3) and the vagus nerve innervate the ear.
Anesthesia of the External Ear
Indications for local anesthesia of the auricle include closure of extensive lacerations or performance of other painful procedures such as incision and drainage of hematomas (Fig. 63-15). Four nerve branches supply the external ear; knowledge of their anatomy is required to understand the location for injection of anesthetic (see Fig. 63-14B). The great auricular nerve (branch of the cervical plexus) innervates most of the posteromedial, posterolateral, and inferior aspect of the auricle. A few branches of the lesser occipital nerve may contribute to this area. The auricular branch of the vagus supplies the concha and most of the area around the auditory meatus. The auriculotemporal nerve (from the mandibular branch of the trigeminal nerve) supplies the anterosuperior and anteromedial aspects of the auricle.
Figure 63-15 Closure of extensive lacerations of the ear such as this require a nerve block of the auricle.
Procedure: Fill a 10-mL syringe with either 1% lidocaine or 0.25% bupivacaine. Mix with epinephrine if a regional block is planned in an area without evidence of traumatized vascularity. Attach the syringe to a 25- or 27-gauge needle (5 to 7 cm in length). One of several methods may be used to induce partial or complete anesthesia, depending on the area of concern. To anesthetize the nerve branches of the great auricular and lesser occipital nerve branches, inject between 3 and 4 mL of anesthetic into the posterior sulcus (Fig. 63-16, plate 1). Insert the needle behind the inferior pole of the auricle and gradually aspirate and inject toward the superior pole along the crescent-shaped contour of the posterior aspect of the auricle. Anesthetize the auriculotemporal nerve anteriorly by placing 3 to 4 mL of anesthetic just superior and anterior to the cartilaginous tragus. Provide anesthesia to the auricular branch of the vagus nerve and the more central areas of the auricle by using the technique shown in Figure 63-16, plates 3 and 4.
Figure 63-16 Anesthesia of the ear.
Another and possibly more effective option is the regional block shown in Figure 63-16, plate 2. Insert the needle subcutaneously approximately 1 cm above the superior pole of the auricle and direct it to a point just anterior to the tragus. Be sure to inject the skin of the scalp while avoiding the auricular cartilage. Aspirate and then slowly withdraw the needle while injecting anesthetic until the needle is almost to the puncture site. Redirect the needle posteriorly and repeat the process while aiming at the skin just behind the midauricular area. Remove the needle and perform the same procedure, but insert the needle just inferior to the insertion of the ear lobule and anesthetize it in a superior direction. Again, block the auricular branch of the vagus as described in Figure 63-16, plates 3 and 4, if additional anesthesia of the concha is required.
EAC and TM
Procedure: Local anesthesia is achieved with a 25- or 27-gauge needle (3 to 5 cm in length) attached to a syringe containing 1% lidocaine with epinephrine. A 1 : 10 mixture of 8.4% sodium bicarbonate to lidocaine helps reduce pain during injection in this sensitive area. Place a speculum just inside the auditory meatus, inject 0.3 to 0.5 mL of the anesthetic into subcutaneous tissue, and stop after a small bulge is raised in the skin. Inject all four quadrants in this manner by moving the speculum after each injection (see Fig. 63-16, plate 3). If additional anesthesia is necessary, give two more small injections. Inject the same amount slightly farther into the canal, once along the anterior wall and again at the posterior wall at the bone-cartilage junction.
Another similar technique involves depositing the anesthetic just lateral, or exterior, to the external auditory meatus. Using the same size of needle and type of anesthetic solution as just described, inject approximately 0.5 to 1.0 mL into each of five points around the auditory meatus and tragus (see Fig. 63-16, plate 4).
Examination
Several methods can be used to examine the EAC and TM. In all methods, grasp the superior aspect of the pinna and pull cephalad and posterior to straighten the slightly tortuous EAC. Examination is most commonly done with a fiberoptic otoscope (Fig. 63-17). Place a plastic or metal speculum into the auditory meatus for examination and use a head lamp or head mirror/light bulb as a light source. After inspection, the operating hand can be used to pass instruments into the EAC and to maneuver them more easily. Although this technique provides excellent illumination, the use of magnifying loupes can improve visualization during procedures. The ideal setup for removal of cerumen or an FB consists of an operating microscope and a speculum. This provides binocular vision and frees the examiner’s hands for instrumentation. Unfortunately, this equipment is seldom found outside the otolaryngology clinic setting. If using a standard otoscope, stabilize the hand holding the otoscope against the temporal part of the patient’s skull to prevent inadvertent injury to the canal if the patient moves unexpectedly.
Removal of Impacted Cerumen
Excretions from the ceruminous or apocrine and sebaceous glands together with cells exfoliated from the EAC combine to form cerumen. One study found that cerumen is composed of lipids, complex proteins, and simple sugars.15 Cerumen repels water, has documented antimicrobial activity, and forms a protective barrier against infection. Cerumen often becomes impacted, which results in complaints of a “blocked” ear, impaired hearing, or dizziness.
Indications and Contraindications
There are few if any true contraindications to removal of impacted cerumen. Cerumen is usually impacted for prolonged periods, and vigorous attempts to remove it may precipitate otitis externa. It is reasonable to instill antiseptics (Vol Sol and others) or antibiotic eardrops for a few days after removal of the cerumen to prevent otitis externa. Neomycin-containing eardrops are best avoided because of precipitation of a contact dermatitis (Fig. 63-18A). Caution should be used in removing impacted cerumen in diabetic patients. Diabetics commonly experience otitis externa after seemingly minor manipulation of the ear canal (see Fig. 63-18B).
Contraindications to irrigation include the following16:
l. Patient aversion to or a history of injury from previous syringe irrigation
l. History of middle ear disease
l. Known or suspected perforated TM
l. FBs, especially sharp objects and vegetable matter
l. Known inner ear disturbance, especially if the patient has severe vertigo
l. History of radiation therapy encompassing the external or middle ear, base of the skull, or mastoid
Procedure
Removal of cerumen can be accomplished by irrigation, manual extraction, or a combination of both. Generally, the procedures used to remove cerumen are safe; however, otologic injury has occurred after this “minor” procedure and has even resulted in litigation.17
Irrigation is an effective approach for removal of cerumen and has the advantage of being painless and simple to perform. It is usually most successful after the instillation of a ceruminolytic (see later). Because the patient does not have to remain completely still, it is ideal for the pediatric population. It is estimated that 150,000 ears are irrigated in the United States each week.17 Though usually more time-consuming and messy than manual extraction, irrigation is an appropriate initial method to attempt and can be performed by technicians with guidance from the clinician.
A recent evidence-based review concluded that the current evidence suggests little difference in the efficacy of water-based and oil-based preparations for removing cerumen.18 Non–water-, non–oil-based preparations appear to be most effective in clearing cerumen and improving syringing, but further research is needed.18 Whichever of the following techniques are used, some tips for successful removal of cerumen include proper lighting, attention to patient comfort, and abrupt cessation when the patient’s comfort level is breached.
Ceruminolytics: These products may soften hardened or impacted cerumen. They are used as adjuncts to other procedures—simply instilling ceruminolytics into the canal will not remove enough cerumen to aid the emergency clinician. If irrigation fails, continued outpatient use of ceruminolytics is often prescribed, usually combined with home irrigation via a bulb syringe or a repeated visit in a few days. Although many products are available as ceruminolytics, a 5% or 10% solution of sodium bicarbonate disintegrates cerumen much more quickly and efficiently than do commercially prepared ceruminolytics and other products.19 Cerumenex, Cerumol, Auralgan, Buro-Sol, alcohol, and oils were all tested and took more than 18 hours to disintegrate cerumen versus approximately 90 minutes for the sodium bicarbonate solutions.19 Hydrogen peroxide is another commonly used ceruminolytic, but its use has not been systematically studied. One study found that the liquid preparation of the stool softener docusate sodium (Colace) was much more effective than Cerumenex as a ceruminolytic.20 An evidence-based review of agents found that docusate sodium administered 15 minutes before irrigation was most effective in facilitating removal of cerumen. Triethanolamine (Cerumenex) and olive oil were the next most effective treatments.21
Place the patient in the supine position with the affected ear up, instill the solution, and wait at least 15 to 30 minutes before attempts at removal (Fig. 63-19, step 1). Repeat the instillation between attempts at manual extraction or irrigation.
Irrigation (Ear Syringing): After a ceruminolytic has been instilled and left in the canal for 15 to 30 minutes, irrigation of the canal is often effective in flushing out impacted cerumen. Ask the patient to sit upright and hold an emesis or ear irrigation basin flush tightly against the skin just below the earlobe. Insert the irrigation tip into the EAC only as far as the cartilage-bone junction, and direct the stream of water superiorly to wash the impacted cerumen away from the TM (see Fig. 63-19, step 2). Warm the water to body temperature to prevent caloric stimulation. Multiple attempts may be necessary, and intermittent attempts at manual removal of loosened cerumen may help hasten the process. During the irrigation, ask an assistant to apply traction to the pinna to straighten the canal for more efficient irrigation. Patients usually feel some discomfort with forceful irrigation, but not severe pain.
