Gastric Cancer, Gastric Precancerous Lesion
Conditions
Brief summary
The purpose of the study is to evaluate the diagnostic performance of a Raman spectroscopy analysis device - Spectra IMDx for the detection of gastric cancer and precancerous lesions in vivo.
Detailed description
This is a prospective, single centre study to assess the diagnostic performance of Spectra IMDx system in detection of gastric cancer and precancerous lesions in subjects with suspected gastric intraepithelial neoplasia who are undergoing upper gastrointestinal endoscopic procedures. The Spectra IMDx system comprises a laser system, a spectrometer, a computer with an analysis algorithm installed, and other ancillary parts. The Spectra IMDx system also comprises a Raman probe that can be connected with the main system. The Raman probe is an assembly of optical fibres and optical components arranged for maximal transmission of light energy. When in use, the laser system will emit a 785nm near infra-red laser that will be transmitted through the Raman probe to the distal end. When the laser is interrogated upon a tissue surface, the light energy is absorbed and reflected. The reflected energy is then collected from the distal end of the Raman probe, transmitted back to the main system, and passed through the spectrometer. The collected signal is then processed to obtain the clean Raman signal, which is then parsed through the analysis algorithm to evaluate its risk for cancer (high/low). Feedback will then be generated on the GUI in real time.
Interventions
DEVICESpectra IMDx system
The Spectra IMDx system is intended to be used in conjunction with conventional white light endoscopy in upper gastrointestinal endoscopic procedure to identify patients with high risk of developing and/or having gastric cancer and it is intended for use on patients above and equal to the age of 18.
Sponsors
Zhongshan Hospital Xiamen University
Endofotonics Pte Ltd
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
DIAGNOSTIC
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* The subject is older than 18 years of age. * The subject is undergoing upper GI endoscopy for suspected intraepithelial neoplasia or gastric cancer lesions (less than 20mm) * The subject must have personally signed and dated the patient informed consent form indicating that he/she has been informed of all pertinent aspects of the study. * The subject must be willing and able to comply with all study procedures.
Exclusion criteria
* The subject has bleeding disorders, such as haemophilia, in whom biopsies are contraindicated. * The subject shows presence of active gastrointestinal bleeding or coagulopathy precluding biopsies. * The subject has rare gastric malignancies such as gastrointestinal stromal tumors (GISTs), lymphomas and neuroendocrine tumors （NETs）. * The subject is pregnant. * The subject with liver cirrhosis, impaired renal function, acute gastrointestinal (GI) bleeding, esophageal varices, jaundice, and GI post-surgery * The subject with severe co-morbid illness, such as end-stage renal failure (ESRF), congestive cardiac failure (CCF), severe osteoarthritis (OA) and rheumatoid arthritis (RA) requiring long term non-steroidal anti-inflammatory drug (NSAID) therapy * The subject has other severe acute or chronic medical or psychiatric condition or laboratory abnormality that may interfere with the interpretation of study results and in the judgment of the investigator would make the subject unsuitable for entry into the study * The subject on regular anti-coagulant prophylaxis such as warfarin must be able to undergo a five-day washout period before gastroscopy. The subject on aspirin, ticlopidine and clopidogrel must be able to undergo a one-week washout period before gastroscopy. The subject's physician or study co-investigator will exercise their clinical judgement to ensure subject's safety. * The subject is unwilling or unable to provide signed informed consent.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Sensitivity of Spectra IMDx system | During the procedure | To assess the sensitivity of Spectra IMDx system for the detection of gastric cancer and precancerous lesions in vivo in the presence of using histological diagnosis as the gold standard. Diagnostic measurements will be assessed in this trial. Using the histopathological diagnosis as the gold standard, true positives (TPs), true negatives (TNs), false positives (FPs) and false negatives (FNs) can be obtained for both Spectra IMDx (IMDx) system. Sensitivity = TP/(TP + FN). |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Specificity of Spectra IMDx system | During the procedure | To assess the specificity and accuracy of Spectra IMDx system for the detection of gastric cancer and precancerous lesions in vivo in the presence of using histological diagnosis as the gold standard. Specificity = TN/(TN + FP). |
| Accuracy of Spectra IMDx system | During the procedure | To assess the accuracy of Spectra IMDx system for the detection of gastric cancer and precancerous lesions in vivo in the presence of using histological diagnosis as the gold standard. Accuracy = (TP + TN)/(TP + TN + FP + FN). |
Countries
China
Contacts
Primary ContactYing Wei, MD, PhD
Outcome results
None listed