In this study, methylene blue (MB) was used as vital nerve staining agent. During gastroenteroscopy, mucosal nerve staining was achieved by endoscopic submucosal injection of MB solution. To observe the staining of nerve fibers, neurons and glial cells in mucosa and submucosa, as well as the morphological changes, density differences and function of mucosal nerve tissues in different gastrointestinal lesions, in order to explore the role of endoscopic vital nerve staining in the diagnosis of gastrointestinal lesions.
This study is a prospective experimental study. The baseline data of the patients were recorded objectively: sex, age, vital signs, body weight, some laboratory examination results (blood routine, liver function, blood coagulation function and electrolytes, etc.) and related medical history (comorbidities, treatment history and life history). Mucosal nerve staining was achieved by endoscopic submucosal injection of methylene blue (MB) solution. The following features were identified and then compared between normal, adenoma and neoplastic mucosa on magnifying endoscopy images in vivo: nerve morphology (straight or irregular), nerve diameter, branching patterns and nerve density. Immunohistochemistry was used to further confirm the presence and to study the morphology of neural structures (PGP9.5 and GFAP staining) and neural attribute (VIP, nNOS, TH, ChAT and SOM staining) on tumor, adenoma and normal mucosal sections.The aim of this study was to explore the role of MB based topical submucosal chromoendoscopy in the identification of neural architecture and special morphology in normal gastrointestinal mucosa, adenomas and malignant lesions during routine endoscopy.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
100
Take a methylene blue injection (2ml:20mg), add 18ml distilled water and mix well. Add NaS2O3.5H2O800mg to the methylene blue solution 10ml, add 4 drops of dilute hydrochloric acid, heat the water bath until the dark blue fades, the solution is milky and turbid, adjust the PH to about 3.5. Put the prepared solution into a glass bottle with a rubber stopper, which is wrapped in tin foil, sealed and protected from light, and stored in a refrigerator at-20 ℃. It can be used after high-pressure sterilization before operation. Sodium thiosulfate-Methylene blue (DMB) staining solution was used as nerve staining agent. During gastroenteroscopy, DMB staining solution was locally sprayed on the surface of gastrointestinal lesion mucosa or injected into the lesion mucosa.
The First Medical Center of Chinese PLA General Hospital
Beijing, Beijing Municipality, China
RECRUITINGMorphological characteristics of mucosal nerves in different gastrointestinal lesions
Mucosal nerve staining was achieved by endoscopic submucosal injection of MB solution. The following features were identified and then compared between normal, adenoma and neoplastic mucosa on magnifying endoscopy images in vivo: nerve morphology (straight or irregular), nerve diameter, branching patterns and nerve density.
Time frame: Immediately after operation
Expression levels of PGP9.5, GFAP, VIP, nNOS, TH, ChAT and SOM of different gastrointestinal lesions
Immunohistochemistry was used to further confirm the presence and to study the morphology of neural structures (PGP9.5 and GFAP staining) and neural attribute (VIP, nNOS, TH, ChAT and SOM staining) on tumor, adenoma and normal mucosal sections.
Time frame: 1 to 3 days after operation
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.