NCT04948047

Breath Combined With CT for Diagnoses of Pulmonary Nodules

Assessment of the Efficacy of Breath Test Combined With Computed Tomography for Diagnoses of Pulmonary Nodules.

• Status: Unknown
• Phase: —
• Study type: Observational
• Enrollment: 900 (estimated)
• Sponsor: Peking University People's Hospital · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: —

Summary

Pulmonary nodules diagnosis using breath test of volatile organic compound (VOC) is in its infancy. The accuracy of VOC analysis in diagnosing malignant pulmonary nodules varies cross the published studies. The diagnosis accuracy of VOC alone is generally poor. We speculate that the accuracy of diagnosing malignant pulmonary nodules will be improved by combining breath test with chest computed tomography (CT). This study aims to establish a predictive model of malignant pulmonary nodule using bio-markers from exhaled breath and image-markers from chest CT with retrospective data from multi centers. The sensitivity, specificity and accuracy of the model will be validated prospectively.

Detailed description

Endogenous volatile organic compounds (VOCs) can be derived from many different metabolic pathways. VOCs can be transported to the alveoli through the blood circulation and expelled by exhalation. Changes in VOCs production, clearance, and alterations in lung air-blood exchange functions can lead to aberrant VOCs profiles in the exhaled breath. Testing exhaled breath has the advantages of being completely non-invasive and easy to collect, and has been considered as a perfect approach for disease diagnoses and therapeutic monitoring. Many clinical studies have found that VOCs in exhaled breath are closely related to disease status. Specific VOCs alterations have been identified in many tumors, especially lung cancer. Pulmonary nodules diagnosis using breath test of volatile organic compound (VOC) is in its infancy. The accuracy of VOC analysis in diagnosing malignant pulmonary nodules varies cross the published studies. The diagnosis accuracy of VOC alone is generally poor. We speculate that the accuracy of diagnosing malignant pulmonary nodules will be improved by combining VOC analysis with chest computed tomography. In this study, we use a highly sensitive mass spectrometry to detect exhaled VOCs of patients with pulmonary nodules. The chest CT will be used for detecting the imaging characteristics of pulmonary nodules. The pathological diagnosis of pulmonary nodules after surgical resections is selected as golden standard. This study aims to establish a predictive model of malignant pulmonary nodule using bio-markers from breath test and image-markers from chest CT with retrospective data from multi centers. The sensitivity, specificity and accuracy of the model will be varied prospectively.

Conditions

• Non-small Cell Lung Cancer
• Pulmonary Nodule, Multiple

Interventions

Type	Name	Description
DIAGNOSTIC_TEST	Pathological examinations as the golden diagnosis criteria	Pathological diagnosis, as the golden standard for diagnosing pulmonary nodules, is achieved by two experienced pathologists and validated by the third senior pathologist.
DIAGNOSTIC_TEST	Breath test combined with computed tomography	Exhaled breath of each participant will be collected with Tedlar bags. The volatile organic compounds will be detected by a high-resolution high-pressure photon ionization time-of-flight mass spectrometry (HPPI-TOFMS). The Imaging markers of pulmonary nodules, including the size, three-dimensional shape, and appearance characteristics, are derived from the chest computed tomography within 2 weeks before surgery resection.

Timeline

• Start date: 2021-07-10
• Primary completion: 2022-10-30
• Completion: 2022-12-31
• First posted: 2021-07-01
• Last updated: 2022-04-20

Locations

1 site across 1 country: China