Ludwig Angina: A Silent Threat

What Is Ludwig Angina?

Ludwig angina is a rare but severe infection that affects the soft tissues in the neck and under the mouth. It has the name of a German doctor who first mentioned it many years ago. The term "angina" refers to choking sensations.

The three areas under the floor of the mouth that are affected by this infection include the sublingual, submandibular, and submental (or tongue, jaw, and chin region). It typically occurs when the lower back teeth are infected. But occasionally, an infection in these areas predisposes an individual to have ‘Ludwig angina’.

Ludwig angina is problematic because it can rapidly worsen and spread to other body areas. It may obstruct the airway, infect the lungs, or even harm vital blood vessels. Therefore, it is crucial to identify this infection and get the treatment immediately. The doctors often recommend antibiotic therapy and occasionally surgery to ensure it does not worsen and pose a life-threatening hazard.

What Is the Etiology of Ludwig Angina?

• Ludwig angina is primarily brought on by infections in the lower back teeth, particularly the second and third molars. Usually, abscesses (collection of pus) surrounding those teeth are the cause of these infections.

• Upper respiratory infections are the most frequent cause of Ludwig angina in children however, it can also occur for unknown reasons.

• Less frequent causes of Ludwig angina include getting an oral piercing, jaw fractures, forced or traumatic intubation, bone infections, abscesses around the tonsils or throat, infections of the salivary glands, ear infections, or infected lumps in the neck.

• Ludwig angina is more likely to occur in those with poor oral hygiene, decayed teeth present, or recent dental work done. Ludwig angina typically affects healthy individuals, although several conditions, such as diabetes, poor nutrition, alcoholism, or a compromised immune system (due to organ transplantation), may enhance the risk.

What Is the Pathophysiology of Ludwig Angina?

It is crucial to understand how infections travel throughout the body. Ludwig angina typically begins on the floor of the mouth and swiftly descends to the region under the jaw.

• The lower portion of the mouth has two spaces: one above and one below a muscle termed the mylohyoid muscle.

• The area under the jaw can readily become infected by infections that travel from the teeth's roots below this muscle. If left untreated, the infection can spread within 30 minutes, enlarge the tongue, obstruct the airway, and expand the vocal cords and other airway tissues.

• The infection can also travel outside the lymphatic system through the layers of tissue to the region around the neck, causing the neck to swell significantly, and is often referred to as a ‘bull neck’.

The bacteria that cause this infection are typically a combination of several kinds that are found in the mouth, including some that do not require oxygen to survive. Staphylococcus, Streptococcus, Peptostreptococcus, Fusobacterium, Bacteroides, and Actinomyces are some examples of typical bacteria.

A person with diabetes or other medical problems may be more susceptible to many severe infections brought on by the drug-resistant bacterium Methicillin-resistant Staphylococcus aureus (MRSA) or the Klebsiella pneumoniae bacteria.

What Are the Symptoms of Ludwig Angina?

The symptoms of Ludwig angina are as follows:

• Toothache.

• Jaw pain.

• Difficulty speaking.

• Fever or chills.

• Neck pain, swelling, or redness.

• Swollen cheeks and jaw.

• Swollen tongue that may stick out.

• Pain or tenderness under the tongue.

How Is Ludwig Angina Diagnosed?

Ludwig angina is not typically or solely detected by scans or tests, but rather by examining the patient physically and checking their symptoms. Waiting for scans might be risky in such cases as the doctors will have to make a decision based on their clinical assessments whether the patient with a compromised airway needs to be intubated or not.

• After airway management, the neck CT (computed tomography) with contrast is a specialized scan that is utilized to determine the severity of the infection and whether any pus-filled pockets exist.

• The CT scan suggests Ludwig angina with the presence of muscle edema, soft tissue gas, enlarged muscles, changes in fat, and thicker tissues.

• Ultrasonography or a brief ultrasound at the bedside can also assist in examining the airway and checking for Ludwig angina.

• Ludwig angina cannot be diagnosed by blood tests or cultures, but these tests can determine whether the infection has spread through the blood or not.

• Ludwig angina, however, is challenging to diagnose when samples are taken with a swab or needle straight from the diseased area.

What Is the Management of Ludwig Angina?

The management of Ludwig angina includes the following:

• Airway Management:

  • Making ensuring the patient can breathe is the foremost priority when treating Ludwig angina because the main risk is airway obstruction, which can be fatal. The patient requires additional oxygen if their oxygen levels are low. Therefore, securing the airway is essential because neck swelling can make it difficult to employ a mask to assist the patient in breathing.
  • Therefore, doctors should be prepared to execute a surgical procedure to build an emergency airway if necessary, but inserting a flexible tube from the nose into the windpipe is the preferred method for securing the airway. Therefore, It is recommended to intubate the patient while they are awake and, if possible, the patient should be seated upright for intubation.

  • Also, blind Intubation where doctors try to insert the tube blindly without having a clear view of the larynx should be avoided in Ludwig angina cases. It might lead to complications like bleeding, ruptured abscesses, swelling that becomes worse, and laryngospasm. Additionally, the devices that extend above the vocal cords should not be used since the swelling could cause them to move out of position.

• Intravenous Antibiotics: The next step is to administer potent antibiotics intravenously (IV) after the airway has been secured. These medicines ought to be effective against a variety of bacteria, including those that can thrive without oxygen. Common antibiotics for Ludwig angina include Ampicillin-Sulbactam or Clindamycin, although in some cases, particularly for people with compromised immune systems, alternative antibiotics may be required. Antibiotics to treat a particular bacteria known as MRSA (Methicillin-resistant Staphylococcus aureus) may also be required in some cases.

• Intravenous Steroids and Nebulized Adrenaline: In addition to reducing swelling and infection, steroids administered intravenously and Adrenaline inhaled through a nebulizer can improve the effectiveness of antibiotics. According to some findings, steroid use may lessen the necessity of sophisticated airway care. For this purpose, Dexamethasone is the most widely used steroid, however, it depends on the doctor’s decision, depending on the circumstances if they want to opt for steroid therapy. However, the use of steroids still needs more studies to become a standard of care depending on the circumstances. Adrenaline nebulized may also aid in respiratory problems.

• Surgical Drainage: In rare circumstances, breathing might be improved by early surgery to relieve pressure in the neck region. Repositioning the tongue and relieving neck tension to increase the space available in the throat is the main of this surgical drainage method. Usually under the jawline, numerous cuts may occasionally be required. The treatment can assist shorten hospital stays and prevent the need for prolonged intubation. Moreover, this surgical method is advised when an abscess is detected on imaging, when there are symptoms of fluid accumulation during examination, or when antibiotics alone are insufficient, this operation is advised. It is typically regarded as safe.

What Are the Complications of Ludwig Angina?

If left untreated, Ludwig angina can lead to severe complications, such as:

• Noisy breathing (stridor).

• Confusion (delirium).

• Trouble swallowing, which causes drooling.

• Extreme tiredness.

Conclusion:

Ludwig angina is caused by a bacterial infection that develops from dental problems. To avoid this unusual type of cellulitis, regular oral hygiene including thorough brushing and flossing is crucial. When a person has a toothache, an oral injury, or feels facial swelling, it is important to call the doctor right away. If one experiences breathing or swallowing issues, they must contact the doctor right away. Fortunately, the prognosis of this condition is excellent and the patient fully recovers with a combination of antibiotics and surgery to drain the abscess. However, it is important to realize that Ludwig angina can be fatal if not promptly treated.