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一般概念胃镜检查中,染色法可被用以将某些染料通过口服、胃镜下喷洒,静脉或动脉注射使胃粘膜染色,然后再作胃镜检查观察其着色图象,以利于诊断早期胃癌,特别是直径6～10mm的小胃癌和直径小于5mm的微小胃癌和不典型胃癌,并与萎缩性胃炎,肠腺化生以及良性溃疡作鉴别。染色原理对比原理:一些染料不能使胃粘膜着色,而是沉积于胃小凹内,与桔红色胃粘膜形成明显的对比,从而在胃镜下可看清胃粘膜的微细凹凸变化,这就是对比原理(图1)。所用的染料即对比染色剂,有靛胭脂和伊文思蓝。应用这一类染料进行染色,称为对比染色。吸收原理:与对比原理相反,胃粘膜
In the general concept of gastroscopy, the staining method can be used to dye certain dyes by oral, endoscopic spray, intravenous or arterial injection to stain the gastric mucosa, and then to perform gastroscopy to observe the colored images to facilitate the diagnosis of early gastric cancer. It is a small gastric cancer with a diameter of 6-10mm, a tiny gastric cancer with a diameter of less than 5mm, and an atypical gastric cancer, and is differentiated from atrophic gastritis, intestinal metaplasia, and benign ulcers. Principle of staining principles of contrast: some dyes can not make gastric mucosal coloration, but deposited in the gastric pit, and the orange gastric mucosa formed a clear contrast, so that in the gastroscope can see the subtle changes in the gastric mucosa, which is the principle of contrast (figure 1). The dyes used, the contrast dyes, were rouge and Evans blue. Dyeing with this type of dye is called contrast dyeing. Absorption principle: contrary to the principle of contrast, gastric mucosa