Chemical preparations for medical use except in the ophthalmologic field, namely, transparent gels for ensuring visual field in endoscopic examination and treatment when diagnosing and treating organs of the digestive, respiratory, urogenital, and endocrine systems as well as the spleen, the heart, great vessels, and hollow and multilayered walled organs studied in splanchnology; chemical preparations for medical purposes for use in the field of endoscopic examination and treatment when diagn...