EVALI

EVALI (e-cigarette or vaping product use-associated lung injury) is a severe lung illness caused by using e-cigarettes or vaping products. It primarily affects the lungs but can also cause digestive and general body symptoms. This condition can be serious, sometimes requiring hospitalization, and its long-term effects are still being studied.

What is EVALI?

EVALI, which stands for e-cigarette or vaping product use-associated lung injury, is a serious lung condition directly linked to using e-cigarettes or vaping products. This illness can cause significant damage to your lungs, leading to breathing difficulties and other symptoms that often require medical attention and sometimes hospitalization.

EVALI is a type of acute lung injury that develops in people who use e-cigarettes or "vape." The condition was first identified in 2019, leading to a nationwide outbreak of severe lung illnesses. It is crucial to understand that EVALI is not an infection but an inflammatory response in the lungs caused by inhaling certain substances found in vaping products. (MedlinePlus, Mayo Clinic) The symptoms of EVALI can range from mild to severe and often worsen over several days or weeks. While most people recover with treatment, some cases can be life-threatening. Medical professionals continue to learn more about EVALI, including its exact mechanisms and potential long-term health impacts. (MedlinePlus, Mayo Clinic, Cochrane Library)

Symptoms

EVALI symptoms can affect your breathing, digestive system, and overall body, often developing gradually over days or weeks. Common signs include shortness of breath, cough, chest pain, nausea, vomiting, diarrhea, fever, chills, and unexplained weight loss. These symptoms can vary in severity and may worsen over time.

The symptoms of EVALI are typically grouped into three main categories: respiratory, gastrointestinal, and general body symptoms. Respiratory symptoms are the most common and include shortness of breath (dyspnea), a persistent cough, and chest pain. You might find it harder to breathe, especially during physical activity. (MedlinePlus, Mayo Clinic) Gastrointestinal (GI) symptoms can include nausea, vomiting, diarrhea, and abdominal (belly) pain. These digestive issues can sometimes be prominent, even before severe breathing problems appear. It's important to note that not everyone experiences all these symptoms, and their severity can differ greatly from person to person. (MedlinePlus, Mayo Clinic) General body symptoms often accompany EVALI, such as fever, chills, and unexplained weight loss. Some people may also experience a rapid heart rate (tachycardia). These symptoms can make you feel generally unwell and fatigued. Because these symptoms can mimic other illnesses, a history of vaping is a key factor in diagnosis. (MedlinePlus, Mayo Clinic)

Causes & risk factors

EVALI is caused by inhaling harmful substances found in e-cigarette or vaping products, particularly those containing tetrahydrocannabinol (THC) and vitamin E acetate. Vitamin E acetate, a thickening agent, is strongly linked to lung damage. Using unregulated or modified vaping products significantly increases your risk of developing this serious lung injury.

The primary cause of EVALI is the use of e-cigarette or vaping products. While the exact mechanism of lung injury is still being studied, strong evidence points to certain ingredients within these products. Specifically, tetrahydrocannabinol (THC), the psychoactive component of cannabis, and vitamin E acetate are strongly implicated. (MedlinePlus, Mayo Clinic) Vitamin E acetate is a chemical often used as a thickening agent in vaping liquids, especially in illicit THC-containing products. When inhaled, this substance can interfere with the normal function of your lungs, leading to inflammation and damage. It coats the lung's surface, disrupting the exchange of oxygen and carbon dioxide. (Mayo Clinic) Risk factors for EVALI include using vaping products that contain THC, particularly those obtained from informal sources like friends, family, or illicit dealers. Modifying vaping devices or using liquids not intended for vaping can also increase your risk. It is important to avoid all e-cigarette and vaping products, especially those from unregulated sources, to prevent EVALI. (MedlinePlus, Mayo Clinic)

How it's diagnosed

Diagnosing EVALI involves a thorough review of your vaping history, a physical exam, and various tests to rule out other conditions. Doctors will typically use chest imaging, such as X-rays or CT scans, to look for lung damage and may perform blood tests or a bronchoalveolar lavage (BAL) to identify specific substances and exclude infections.

When you see a doctor with symptoms suggestive of EVALI, the first step is often a detailed discussion about your e-cigarette or vaping product use history. This information is crucial because EVALI is a diagnosis of exclusion, meaning doctors must first rule out other potential causes for your symptoms, such as infections like pneumonia or influenza. (MedlinePlus, Mayo Clinic) Doctors will perform a physical examination and typically order chest imaging. A chest X-ray or a computed tomography (CT) scan of your lungs can reveal patterns of lung damage, such as "ground-glass opacities," which are characteristic of EVALI. These images help doctors visualize the inflammation and fluid buildup in your lungs. (MedlinePlus, Mayo Clinic) Further diagnostic tests may include blood tests to check for signs of inflammation or infection. In some cases, a bronchoalveolar lavage (BAL) might be performed. During a BAL, a small tube is inserted into your lungs to collect fluid, which can then be analyzed for signs of inflammation, infection, and the presence of substances like vitamin E acetate. (Mayo Clinic)

Treatment options

Treatment for EVALI primarily focuses on supportive care to help your body recover and manage symptoms. This often includes oxygen therapy to assist breathing, intravenous (IV) fluids for hydration, and sometimes corticosteroids to reduce lung inflammation. In severe cases, hospitalization and ventilator support may be necessary to ensure adequate oxygenation.

Most people diagnosed with EVALI require hospitalization due to the severity of their lung injury. The cornerstone of treatment is supportive care, which aims to help your body heal while managing your symptoms. This often involves providing supplemental oxygen to ensure your lungs can deliver enough oxygen to your bloodstream, especially if you are experiencing shortness of breath. (MedlinePlus, Mayo Clinic) Intravenous (IV) fluids are also commonly administered to maintain hydration and support overall body function. For many patients, corticosteroids, such as prednisone, are prescribed. These powerful anti-inflammatory medications help to reduce the swelling and inflammation in your lungs, which is a key component of EVALI. (Mayo Clinic) In situations where an infection cannot be immediately ruled out, doctors may also administer antibiotics until test results confirm that an infection is not the cause of your lung illness. For very severe cases of EVALI, where breathing becomes extremely difficult, you might need a ventilator (breathing machine) to help you breathe while your lungs recover. (Mayo Clinic)

Recovery & outlook

Most people with EVALI recover with appropriate medical treatment, but the recovery process can vary depending on the severity of the illness. While many improve, some individuals experience severe lung damage requiring intensive care. The long-term health effects of EVALI are still unknown, emphasizing the importance of ongoing medical follow-up after recovery.

The outlook for EVALI is generally positive for most individuals, with the majority recovering after receiving medical treatment. However, the path to recovery can differ significantly. Some people may experience a relatively quick improvement, while others might face a longer recovery period, especially if their illness was severe. (MedlinePlus, Mayo Clinic) In severe cases, EVALI can lead to significant lung damage, requiring prolonged hospitalization, including stays in an intensive care unit (ICU) and support from a mechanical ventilator. Tragically, some cases of EVALI have resulted in death. This highlights the serious nature of the condition and the importance of prompt medical attention. (MedlinePlus, Mayo Clinic) A critical aspect of EVALI is the uncertainty surrounding its long-term effects. Because EVALI is a relatively new condition, medical professionals are still studying whether it causes lasting lung damage or increases the risk of other health problems in the future. Therefore, ongoing monitoring and follow-up with your doctor are important after recovering from EVALI. (MedlinePlus, Mayo Clinic, Cochrane Library)

When to see a doctor

You should see a doctor immediately if you use e-cigarettes or vape and develop any respiratory symptoms like shortness of breath, cough, or chest pain. Also seek prompt medical attention if you experience digestive issues such as nausea, vomiting, diarrhea, or abdominal pain, or general symptoms like fever, chills, or unexplained weight loss.

It is crucial to seek medical attention if you use e-cigarettes or vaping products and begin to experience any concerning symptoms. Do not delay, as EVALI can worsen rapidly. Pay close attention to any changes in your breathing, such as new or worsening shortness of breath, a persistent cough, or pain in your chest. (Mayo Clinic) Beyond respiratory symptoms, be aware of gastrointestinal issues. If you develop nausea, vomiting, diarrhea, or abdominal pain, especially in combination with vaping, these could be signs of EVALI. General symptoms like fever, chills, or unexplained weight loss also warrant a visit to your doctor. (Mayo Clinic) For severe symptoms, such as extreme difficulty breathing, severe chest pain, or a rapid heart rate, seek emergency medical care immediately. Always be honest with your healthcare provider about your vaping history, as this information is vital for an accurate diagnosis and appropriate treatment. (Mayo Clinic)

Frequently asked questions

Can EVALI be prevented?

Yes, EVALI can be prevented by not using e-cigarette or vaping products. It is especially important to avoid products containing THC and those from informal or unregulated sources. (MedlinePlus, Mayo Clinic)

Is EVALI contagious?

No, EVALI is not contagious. It is a lung injury caused by inhaling specific substances from vaping products, not an infection that can spread from person to person. (MedlinePlus, Mayo Clinic)

Are all vaping products dangerous?

All e-cigarette and vaping products carry potential health risks. However, products containing THC, especially those with vitamin E acetate, and those from unregulated sources are most strongly linked to EVALI. (MedlinePlus, Mayo Clinic)

How long does it take to recover from EVALI?

Recovery time for EVALI varies. Many people improve within days or weeks with treatment, but severe cases may require longer hospitalization and recovery periods. Long-term effects are still being studied. (MedlinePlus, Mayo Clinic)

What is vitamin E acetate and why is it harmful?

Vitamin E acetate is a chemical used as a thickening agent in some vaping liquids, particularly those with THC. When inhaled, it can coat the lungs, interfering with normal lung function and causing inflammation and damage. (Mayo Clinic)

Can children or teenagers get EVALI?

Yes, children and teenagers who use e-cigarettes or vaping products are at risk for EVALI, just like adults. Vaping is particularly prevalent among young people, making them vulnerable to this condition. (MedlinePlus, Mayo Clinic)

Sources

• MedlinePlus — EVALI
• Mayo Clinic — EVALI
• Cochrane Library — EVALI