Epiglottitis

Epiglottitis is the inflammation of the epiglottis—the flap at the base of the tongue that prevents food entering the trachea (windpipe).

[7] Symptoms are usually rapid in onset and include trouble swallowing which can result in drooling, changes to the voice, fever, and an increased breathing rate.

[1] Epiglottitis was historically mostly caused by infection by H. influenzae type b (commonly referred to as "Hib").

[5] Epiglottitis is associated with fever, throat pain, difficulty in swallowing, drooling, hoarseness of voice, and stridor.

The child often appears acutely ill, anxious, and will have very quiet shallow breathing often keeping the head held forward and insisting on sitting up in bed, commonly called the "tripod position.

"[11] The early symptoms are usually insidious but rapidly progressive, and swelling of the throat may lead to cyanosis and asphyxiation.

[1] H. influenzae type B contains a capsule which helps it avoid being destroyed by macrophages and also contains surface proteins that allow it to stick to the lining of the upper respiratory tract.

There have been many cases of epiglottitis reported in immunocompromised patients, including those undergoing cancer treatment and those who are HIV positive.

[20] If epiglottitis is suspected, attempts to visualize the epiglottis using a tongue depressor are discouraged for this reason; therefore, diagnosis is made on basis of indirect fiberoptic laryngoscopy carried out in a controlled environment like an operating room.

[22] If there is visual or radiologic evidence that the infection has caused tissue destruction, the disease is called "necrotizing epiglottitis" (NE).

[23] The feared complication of NE is the bacteria spreading to the surrounding neck muscles and causing cervical necrotizing fasciitis which is a surgical emergency.

[26] Currently, the CDC recommends that children receive a two or three-dose primary series with an additional booster dose.

[27] The countries of the world who have included the Hib vaccine in their immunization schedules typically begin the series at the age of two or three months with subsequent doses administered at four or eight week intervals.

[28] Routine vaccination in these nations has led to a dramatic decrease in the incidence of invasive diseases caused by H. influenzae type b such as epiglottitis, meningitis and pneumonia.

[13] Emergent tracheal intubation with general anesthesia (inhalational induction to preserve spontaneous ventilation) in the operating theater is standard.

[13] The optimal technique is controversial and likely determined by contextual factors such as the severity of epiglottitis and the clinical location (ie emergency department or intensive care or the operating room).

[29] If S. aureus is suspected to be causing the disease, then the treatment should include ceftaroline or clindamycin as these would provide coverage against antibiotic resistant strains of that bacteria (MRSA).

[23] If the tissue damage continues to spread and necrotizing fasciitis of the neck is suspected, patients are taken to the operating room for emergency debridement.

[30] Between 1998 and 2006, there were an average of 36 deaths per year in the United States attributed to epiglottitis, giving a case-fatality rate of 0.89% during that time period.

[31] Patients who recover from necrotizing epiglottitis often regain their ability to swallow foods and liquids despite the tissue damage.

[37] The treatments given to Washington, such as severe bloodletting, an enema, vinegar, sage, molasses, butter, blistering his throat with Spanish fly, requiring him to swallow mercurous chloride and antimony potassium tartrate, and applying wheat poultices to various parts of the body, are no longer used.

Drawing (left image) and CT scan (right image) of the normal pharynx as a cross-section viewed from the side (sagittal view), including the normal epiglottis (orange arrow), opening to the esophagus (yellow arrow), and opening to the trachea (blue arrow). An infected epiglottis becomes swollen and causes issues with swallowing, speaking, and breathing due to its proximity to the esophagus and trachea. Other labeled structures include the tongue (pink arrow) and vertebral bodies of the cervical spine (grey arrow)