Foreign Body in ENT and its Management

A "foreign body" is any material or object that is unnaturally placed in a particular anatomical region.  Foreign bodies can be life-threatening, particularly in the tracheobronchial tree or respiratory tract; their locations can range from benign, like a bead in the ear, to dangerous, like the larynx. The other foreign objects in the digestive tract, nose, or ears, on the other hand, are benign and do not pose a serious risk, but they still need to be removed because they may result in unfavorable symptoms and long-term issues. 

Foreign bodies can be categorized as organic or inorganic depending on their type. Children are more likely to have foreign bodies because they frequently pick up objects from their environment and put them in their mouths, ears, or noses. Children who repeatedly insert foreign bodies may experience mental health issues. Delays in the appearance of foreign bodies in the aerodigestive tract can be caused by neurological diseases; children with attention deficit or hyperactivity disorder may be more likely to self-insert foreign bodies.

Ear Foreign Bodies

Children who are left-handed often place foreign objects in their left ear, whereas those who are right-handed typically place them in their right. The ear in which the foreign body is entered can be used to determine the handedness of the kid since a child who is right-handed can easily and conveniently insert the foreign body in their right ear, while a child who is left-handed can do the same. A right-handed child placing a foreign body in their left ear is less usual. It's possible that it was placed in the ear by another playschool student.  

Certain foreign objects stay inert and don't give the patient any symptoms. We refer to these alien objects as inert foreign entities. Foreign objects that are inert can be recognized as kdelays in removing some material have serious repercussions. For instance, button batteries can emit alkaline material and cause alkaline tissue necrosis if they are removed within a certain time frame, such as 24 to 48 hours. This can cause the foreign body to spread and harm the surrounding area. 

Foreign bodies may be located in the isthmus, the bony section of the canal, or the cartilaginous component of the canal. The external auditory canal's narrowest section, the isthmus, is located 6 mm lateral to the tympanic membrane. If the foreign body is pushed in rather than removed out of the isthmus, impaction of the foreign body may result.  The Isthmus is the narrowest part of the ear, making it difficult to remove foreign objects from it and perhaps causing tympanic membrane perforation in the process.    

To remove foreign bodies from the isthmus, use a magnifying device, such as an endoscope or microscope, to see the gap between the object and the tympanic membrane. The foreign body should be removed by inserting the device between the spaces.  A lot of foreign objects can protrude from the ear, mainly when they are in the bony and lateral sections of the canal. When it is inside the isthmus, it has a lower chance of being extruded.

As a result, inert foreign objects like beads, pencil lead, tiny pieces of rubber, or thermocol balls can be removed later, but foreign objects that can create problems, like button batteries, live insects, or any corrosive material, should be removed as soon as possible. Foreign objects with the potential to cause corrosion should be eliminated right away.

Also Read: EPISTAXIS- Anatomy, Classification and Management

Management Of Ear Foreign Bodies

Aural foreign bodies are removed using a range of approaches. The type, size, shape, hygroscopic or non-hygroscopic, living or nonliving, position, smooth or hard, and graspable or non-graspable of a foreign body dictates the technique utilized. Additionally, the patient's participation is required. For example, it might be challenging to remove foreign bodies from an awake youngster since they won't participate and won't move about much, which could cause trauma or injury to the canal during the removal process. In certain situations, general anesthesia or sedation is preferable to local anesthetic. However, older kids or young adults who have a foreign body may cooperate under local anesthetic.

Syringing, irrigation, wax hook, and microsuction are the methods available for removing the foreign body; hygroscopic foreign bodies should only be removed by syringing; if a hygroscopic foreign body is syred, it will swell and clog the canal, making removal of the foreign body more challenging.  Any foreign body found in the external auditory canal can be removed using the wax hook; however, there must be sufficient room

For foreign objects that are unable to hold or that move away under pressure or suction, microsuction is utilized. The child's participation is crucial, and for safe removal, up to 30% need general anesthetic.  If the patient is uncooperative or the incorrect technique is applied, it has been reported that up to 47% of children experience difficulties after having a foreign body removed, including lacerations and perforations in the tympanic membrane.

In most cases, a cut heals on its own. Topical antibiotic ointments or drops can be applied. For healing, however, it is preferable to keep the ear dry. Following healing, a scab forms, which eventually peels off, and the patient heals. If there is a perforation in the tympanic membrane, it should mend over the course of four to six weeks. In the event that healing is absent, myringoplasty ought to be done. The outcome of the perforation is a flap in the tympanic membrane. Under local anesthetic, the flap above the perforation should be replaced.  

 As long as the tympanic membrane is intact, irrigation ought to be a safe method. It should not be done if the patient has a history of vasovagal attacks, has a hygroscopic foreign body in their body, or has a tympanic membrane perforation. When irrigation water is used for foreign bodies, it should be at body temperature, or 38°C. A calorie response may result from using water that is either hot or too cold for the patient, which could lead to collapse, vertigo, or vasovagal syncope. 

Round wall fistulae, ossicular dislocation, and tympanic membrane rupture are among the complications associated with syringes. By pointing the syringe's nozzle toward the posterior canal wall, you can create water pressure behind the foreign object and force it out. On the other hand, the tympanic membrane may puncture if the nozzle is positioned in its direction. Increased velocity causes disruption of the ossicular skin and may result in a fistula at the round window

Irrigation may not always be able to remove an organic foreign body. For instance, swelling occurs when a dried pea is hygroscopic, which causes total blockage, further difficulty in removal, and discomfort since pressure is applied to the skin of the canal wall.  

A living insect in the ear's external auditory canal has the potential to migrate and lacerate tissue. Therefore, it is necessary to use oil drops to immobilize or asphyxiate the live insect or local anesthetics like 4% lignocaine or 4% xylocaine to paralyze it. The live bug becomes motionless as a result, making its removal from the ear simple.

Nasal Foreign Bodies

Any youngster who exhibits unilateral nasal discharge that smells bad and unilateral excoriation of the nasal rim has to have a nasal foreign body taken into consideration.Two to four years old is the most prevalent age at which foreign bodies in the nose occur. 

Four days are needed at the very least before a nasal foreign body is discharged. The mother will take the child to the doctor right away if she witnesses the child placing anything in the nose; otherwise, the foreign body may not cause nasal discharge right away. The foreign body typically causes an inflammatory response around it and produces nasal discharge over the course of three to four days. The mother complains to the doctor about obstruction, discharge from her nose, and difficulty breathing from that side. These signs and symptoms

However, an instant nasal discharge might result from a button battery in the nose. A foreign body granulation that forms after extended indwelling may lead to the production of rhinoliths. Rhinoliths form when a foreign body is in the nose for an extended length of time due to the deposition of calcium and magnesium crystals around the object. 

A rhinolith is the accumulation of calcium or magnesium surrounding a focal object, such as blood clots, mucus, or foreign things. Rhinoliths are radio-opaque, meaning they can be seen in the nose, and are made up of carbonates, magnesium phosphate, and calcium salts. An enduring nasal foreign body may even cause the inferior turbinate to hypoplasia. 

The rhinolith, which appears as a stone-like mass in the nasal cavity in the first picture, is removed in the second picture. Long-term rhinolithic compression has resulted in a compressed, tiny, and hypoplastic inferior turbinate.

Management Of Nasal Foreign Bodies

Hooks, suction, catheters, and forceps are the tools used to remove foreign objects from the nose.  The standard procedure for extracting a foreign body from the nose involves sliding a hook—better yet, a Bent Jobson Horne probe—over, behind, and front of the foreign object. In the event that the opposite approach—that is, one carried out from the front—is employed, the foreign body may be pushed posteriorly and may descend into the oropharynx, the larynx, or the hypopharynx. Because foreign objects can enter the aerodigestive tract through the larynx, they can be fatal.  

Asphyxia is possible if the foreign body moves posteriorly. This generally happens when untrained individuals, including doctors or the child's mother, remove the foreign body. The mother's kiss is another method for getting rid of nasal bodies. It involves blowing into the child's mouth from mouth to mouth while keeping their unaffected nostrils closed. This creates positive pressure in the retronasal area, which forces the foreign body out.

A catheter can be utilized when there is less space between the foreign body and the nasal architecture and it is difficult to implant the tool. Hollow foreign bodies may not respond well to this method. When a hollow foreign body, like a thermocol ball, is removed via a catheter, it may explode into fragments. Balloon catheters or Fogarty catheters may be utilized in these situations.When inserted intranasally behind the foreign body, balloon catheters are flat. After that, it is partly inflated and extracted from the nose, pushing the foreign body in front of it without breaking apart or collapsing.

Because the nasal valve is the smallest part of the nose, it can occasionally be challenging to remove a large foreign item through the anterior nostril. In these cases, the patient who has been anesthetized may be able to push the object into their pharynx. To prevent the foreign body from entering the respiratory system, the patient needs to be intubated or put under anesthesia. 

Normally, a foreign object that falls into the laryngopharynx is swallowed or coughed out. The foreign body can occasionally inadvertently enter the airway tract when the patient is talking or leaping during eating, but if the patient is cognizant, awake, and alive, the cough reflex will prevent it from doing so.

It used to be claimed that "one should never see the sun rise or set on a foreign body that has been inhaled or consumed. This means that the foreign body should be removed from the patient as soon as possible, ideally within 12 hours."However, it is currently thought to be safe to leave nasal foreign bodies in children with neurological normalcy so that they can be surgically removed during regular business hours if necessary.

Inhaled Foreign Bodies

Children under the age of three account for the majority of foreign bodies breathed into the laryngotracheal junction. Boys are more likely than girls to have them. For kids under three years old, the foreign body is usually organic (like food), while for kids over five years old, it's more likely to be inorganic. A further factor contributing to the high rate of foreign body aspiration may be the tendency of young children to put items in their mouths.

Normal or neurologically stable children are often able to clear their airway, but this ability is less well developed in younger and neurologically unstable patients, and there is a high chance of aspiration. • Foreign bodies in the tracheobronchial system seem to cause more complications than in other anatomical sites.

Heimilch released a study on a technique for removing foreign objects from the larynx in 1975. Holding the patient from the back, compression is applied to the xiphi sternum, creating a positive pressure that pushes the foreign body out of the body. Compression is used in conjunction with back blows to remove the foreign body from the larynx.This tactic might be in charge of decreasing foreign body aspiration-related deaths among children under the age of fifteen.

Every patient who has a laryngeal foreign body should try this maneuver. The process could have serious side effects, but the risk of not doing anything is higher. There is a history of laryngeal foreign things at the dinner table, including the youngster jumping, talking, choking, coughing, turning blue, and not speaking or changing voice. In these situations, Heimlich's technique ought to be carried out.

In youngsters younger than two years old, this motion is challenging to execute. The youngster should be placed in the prone position, facing downward on the palm, and should return strikes with their palm on their thigh. By doing this, the foreign object in the larynx will be removed. If the kid is experiencing respiratory distress during feeding, look for an oropharyngeal foreign body in their mouth; if one is found, use a finger sweep technique to remove it. In the event that the foreign body is not apparent, Heimlich's maneuver should be used to remove any potential laryngeal foreign bodies.

Choking, coughing, hoarseness, shortness of breath, wheezing, increased work of breathing, cyanosis, asphyxiation, and mortality are among the symptoms and indicators of inhaling a foreign body. 

Asphyxia and death may result if a foreign body, such as a coin that totally blocks the airway, is lying above the voice cords.

Because they have the potential to completely restrict a patient's airway, laryngeal foreign bodies pose a greater risk to patients than tracheal or bronchial foreign bodies. Unlike laryngeal foreign bodies, which rarely cause hoarseness, bronchial foreign bodies do not cause acute stridor or respiratory distress in the patient; also, if one bronchus is obstructed, the other bronchus is available.  

Mishaps frequently take place when the child is eating. If the youngster coughs up an object following a choking incident without exhibiting any symptoms, more testing is necessary. To ensure that the occult foreign body or asymptomatic foreign body is not overlooked, a low threshold is necessary. The longer the foreign body is placed, the higher the risk of long-term issues; The patient heals fully if the foreign body is removed in less than one month.

Only thirty percent of patients make a full recovery if the foreign body remains for longer than three months. The remaining patients either had bronchiectasis or a persistent cough and wheeze.  The trachea, larynx, lung, and bronchus (the right side more often than the left) are the airways where the foreign body has been found.

Bronchioles are the most frequent site of foreign bodies in the respiratory system. Because the right bronchus is shorter, straighter, and aligned with the trachea, it is more frequently affected than the left bronchus. The trachea is the second most frequent site of foreign substances. The lungs are the fourth place, and the larynx is the third.The right side of the lungs' ventilatory system is affected by a foreign body in the right bronchus. The patient doesn't experience any immediate difficulties as a result.  

Foreign body in larynx

Foreign bodies lodged in the larynx, particularly in the vocal cords, can result in laryngospasm, an instantaneous airway obstruction that poses a serious risk to life. Hemlich's maneuver is the immediate management procedure for laryngeal foreign bodies.  A foreign body causing partial obstruction in the larynx can cause respiratory distress, change in voice, and aphonia. If the foreign body is causing complete obstruction, it can cause stridor and, if not removed immediately, can lead to the patient's death.  

Foreign body in Trachea

If the foreign body is in the trachea, it descends toward the carina during inspiration. The air current from the bronchus pushes the foreign body upward during expiration. The alien object is constantly moving and shifting positions. It is not stationary. The precise location of the foreign body should be known if bronchoscopy is being conducted, but the location should be determined prior to the procedure by palpatory thump, etc.

An X-ray can be used to determine the precise location of a movable foreign body during inspiration and expiration. X-rays taken during inspiration and expiration will display the foreign body in two distinct locations.

Foreign body in Bronchus

If a foreign body completely blocks the bronchus, no air can enter, there is no ventilation, and the lung collapses or develops atelectasis due to the decreased lung volume. There will be partial airflow into and out of the lungs if the foreign body is causing a partial blockage of the bronchus. The airways have narrowed, which compromises ventilation. Consequently, the patients start to wheeze.  

Foreign bodies can occasionally result in ball valve-like structures that function as valves by allowing air to enter only during inspiration and to exit only during expiration. The lung becomes hyperinflated as a result. Emphysema eventually develops and causes pneumothorax.

The foreign body may have the function of a reverse valve, allowing air to escape during expiration but blocking it during inspiration. Consequently, the lung collapses or develops atelectasis, and the residual volume of air decreases. The effects of the foreign body in the bronchus are variable from atelectasis, pneumothorax or collapse of the lung depending upon the behavior of the foreign body in the airway.

Partial airway blockage causes voice problems like hoarseness, stridor, dyspnea, prolonged atypical croup, or even odynophagia, which can lead to misdiagnosis and delay in identifying the laryngeal foreign body. Complete airway blockage causes hypoxia or laryngospasm and death by asphyxiation. Laryngeal foreign bodies are relatively uncommon.

The foreign body obstructing the glottis inside the larynx has a spheroid or flat shape. Sharp metallic objects, such safety pins, can pierce the tracheal wall or vocal cord, making surgery difficult. Unless a foreign body is radiolucent, radiography is required for every foreign body existing within the body. Pneumothorax, mediastinal shift pneumonia, hyperinflation, and atelectasis are further radiographic findings.

Computed tomography virtual bronchoscopy is highly sensitive to identify a foreign body within the airway, but this requires general anesthesia as most would consider a rigid bronchoscopy because the patient's condition may change suddenly while anesthetized. • In asymptomatic patients, CT bronchoscopy may be a reasonable option, but it cannot replace endoscopy. Traditionally, there is hyperinflation of the lung on the side of the foreign body due to the ball-valve effect.

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• This is an x-ray of a patient where a foreign body is not visible, but indirect signs are noticeable. 

Management Of Inhaled Foreign Bodies

It is preferable to remove the foreign body from the airway as soon as possible because waiting too long could cause it to cling to the respiratory wall and become more challenging to remove. With a high success rate, flexible bronchoscopy with an endotracheal tube or laryngeal mask is used to identify and remove foreign substances.

Nevertheless, flexible endoscopes pose a serious obstruction and are unable to ventilate the patient. The anesthetist and surgeon require the same area to work on a foreign body in the airway. This is where the surgeon removes the foreign body and the anesthetist ventilates. The difficulty lies in the fact that the saturation will drop if the anesthetist is unable to ventilate, and the surgeon will be unable to remove the foreign body if the anesthetist is able to breathe.Modern anesthesia methods like jet ventilation, hyperventilation, and rigid bronchoscopes—which come with a ventilation port that allows the anesthetist to ventilate alongside the bronchoscope—have made this obstacle obsolete.

It is recommended to perform a direct laryngotracheobronchoscopy or micro laryngotracheobronchoscopy (MLTB) as soon as possible to identify and remove the foreign body.

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When should you perform endoscopy and removal of foreign body?

Since endoscopy can be fatal and cause a number of complications, it is best to remove foreign bodies from the airway as quickly as possible. Compared to other foreign bodies, laryngeal foreign entities are considered an emergency. If granulation is present with an inherent risk of bleeding, topical adrenaline is highly helpful in clearing the area immediately surrounding the foreign body.  

As soon as the foreign body is successfully removed, a second inspection is required to make sure no further pieces are left behind.

The usual use of steroids is to lessen the effects of edema brought on by airway instrumentation.

Complications of foreign body removal

Even in the event that foreign body removal by MLTB is effective, delayed pneumothorax may develop afterward. • Complications of MLTB include tracheal laceration, pneumonia, hemorrhage into the airway, and cardiac arrest owing to hypoxia. In situations when the patient is too unstable or if tracheal foreign body removal is not feasible without total airway obstruction and a high risk of cardiac arrest, extracorporeal membrane oxygenation (ECMO) is a helpful treatment to sustain oxygenation.  

A tracheal fissure, or opening in the trachea as a tracheostomy incision for tracheal foreign bodies, thoracotomy for bronchial sites, laryngofissure in case of laryngeal foreign bodies, and regional lobe removal or segmental resection of the lung in case of lung foreign bodies, is an alternative strategy in situations where it may not be possible to remove a foreign body using endoscopy.  

Ingested Foreign Bodies

Ingested foreign bodies are typically disregarded since, if consumed, they will eventually pass through peristaltic motions and be expelled through the stools.Complications may arise, though, if certain foreign objects are held in the stomach and become clogged in the intestines. 

Removing the foreign body is a safer option than treating any associated consequences. Drooling, pain, dysphagia, and odynophagia are among the symptoms. 

Small and blunt foreign bodies may pass the cricopharyngeal sphincter unhindered, but foreign bodies like chicken and fish bones may become lodged in the tonsil, tongue base, cricopharyngeus, or pharyngeal wall. The most frequently consumed item is likely the coin, accounting for 70% of all cases.

Management Of Ingested Foreign Bodies

Food bolus impaction in youngsters should be taken more seriously as it may indicate eosinophilic esophagitis. If a child has a food bolus, the surgeon should take three lower esophageal biopsies for histology, making sure to ask particularly for an eosinophil evaluation. 

Metallic foreign bodies can be found using radiography or a metal detector. Flexible nasendoscopy can either identify the foreign body in the pharynx or show saliva accumulating in the pyriform fossae, indicating a hold-up of a foreign body in the esophagus.

If not removed, foreign things, such as small fish bones, may migrate into the soft tissue of the posterior pharyngeal wall and eventually cause infection and neck abscesses. Foreign bodies may absorb without removal but usually require surgical removal. Since complications are decreased, early intervention is preferable. Perforation, mediastinal infection or abscess, retropharyngeal abscess, and esophageal stenosis are among the consequences. If intervention is postponed for more than 24 hours, therapeutic endoscopy may take longer to complete.

• This picture shows a foreign body in the digestive tract. 

This picture shows a button battery in the respiratory tract. 

This picture shows a coin that impacted the upper esophageal sphincter. It is better to take both an anteroposterior and lateral view of a coin because the Anteroposterior view confirms the presence of the coin, and the lateral view confirms its position in the respiratory or digestive column.

Special Considerations

Magnets and button batteries should be removed since they can be harmful in a number of ways, including creating an electrical circuit between the battery terminals. Alkaline leakage from the battery, particularly in salty environments o Pressure necrosis if the battery is pressured at a specific location. The emission of poisonous substances that might harm the entire body, like mercury.

Because acids, like caustic, have no color or smell and can produce corrosive injuries that can be fatal, they are more common in younger children. Tissue liquefaction and necrosis might result in harm when exposed to strong alkalis. In addition, thrombosis of the supplying veins causes decreased blood flow, which impedes healing. A considerable percentage of elderly adults and teenagers who attempt suicide use corrosives. Corrosive foreign body ingestion in younger children can happen by accident, but in later teens and adults, it can be the result of a mental health problem. Not every foreign body is life-threatening.  Ideally, take action quickly.

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