Overview of the role and clinical application of breath testing

Breath test is a non-invasive, safe medical testing method that assists in diagnosing diseases or assessing physiological functions by analyzing specific components in the breath exhaled by the subject. Its core applications includeHelicobacter pylori infection testing,Lactose intolerance screening,Liver function assessmentandSmall Intestinal Bacterial Overgrowth (SIBO) DiagnosisWait. Among them, the urea breath test (UBT) for Helicobacter pylori is the most commonly used clinical test, while other types such as hydrogen breath tests are used to evaluate metabolic abnormalities or digestive function. This type of test has become an important alternative to invasive examinations due to its simplicity of operation and high accuracy.

Helicobacter pylori detection: the “gold standard” for accurate diagnosis

A urea breath test (UBT) is performed by having the patient take a¹³C or¹⁴C-labeled urea capsules detect Helicobacter pylori infection by detecting the labeled carbon dioxide content in exhaled breath. Its sensitivity and specificity exceed 95% and is listed asThe preferred method for non-invasive diagnosis. Compared with gastroscopy biopsy, UBT does not require anesthesia and is more suitable for special groups such as children and pregnant women. Commonly used products in China includeHuagen Anbang's¹³C-urea breath test reagentandShenzhen CNNC Haideway¹⁴C testing equipment.

Lactose Intolerance and SIBO: Application of the Hydrogen Breath Test

The hydrogen breath test monitors changes in hydrogen concentration in exhaled breath to determine the body's ability to decompose lactose or whether small intestinal bacteria are overproliferating. In patients with lactose intolerance, due to the lack of lactase, undecomposed lactose ferments in the intestines to produce hydrogen, and the breath hydrogen value is significantly increased. Similarly, SIBO patients have abnormal hydrogen or methane levels after ingesting glucose due to an imbalance in their intestinal flora. This type of test needs to be performed on an empty stomach, and the results are affected by factors such as diet and antibiotics, and must be comprehensively judged based on symptoms. Related equipment such asBreathTracker by QuintronWidely used in Europe and America.

Liver function assessment and emerging research areas

Some breath tests can also indirectly assess liver function, such as¹³The C-methacetin test reflects liver cell activity by detecting the breath concentration of liver metabolites. In addition, the scientific research field is exploring the potential of breath testing in diseases such as lung cancer (detection of volatile organic compounds VOCs) and diabetes (acetone concentration). Although these applications are not yet widespread, their non-invasive advantages provide new directions for early screening in the future.

Summary: Clinical Value and Limitations of Breath Testing

Due to its safety and convenience, breath test has become an important tool for the diagnosis of digestive system diseases, especially suitable for screening for Helicobacter pylori and functional diseases. However, the results may be affected by medication and individual differences, and operating specifications must be strictly followed. As technology advances, the application scope of breath testing is expected to further expand, providing more non-invasive solutions for precision medicine.

Quote sources:
1. World Gastroenterology Organization (WGO) "Diagnostic Guidelines for Helicobacter pylori"
2. "Expert Consensus on the Clinical Application of Breath Test" by the Gastroenterology Branch of the Chinese Medical Association
3. Product information reference: Huagen Anbang official website, CNNC Haideway official information