A STUDY ON THE TENTATIVE MODEL OF FGS WITH SCALE(FGS-BLG)

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The endoscopic approach to the digestive tract has been remarkable in recent years. However, too much subjective interpretation appears to be present in the today's endoscopy. Attention has been recently focus-ed on giving objectivity to the subjective nature of this method. Observation under constant intragastric pressure and measurement in the stomach represent such attempt. As one of the latter attempts, Machida Endoscope Company tentatively produced a fibergastro-scope (FGS-BLG). We had an opportunity to use this fiberscope and got the fairly satisfactory result on intragastric measurement. The structure of FGS-BLG is almost identical with FGS-BL, except that BLG has a fiber bundle for scale besides the image fiber bundle. In the apical portion, there is a window for the scale fiber bundle beside the object lens window and the light entered from here is observed as a blight line above the picture. The length of this line changes according to the lens to object distance so that it always indicates 1 cm on the surface of the object with adjustment of f ocuing. Measuring with this scope in the effective range of the scale, the lens to object distance is limited to approximately 2-5 cm. Because the light coming into thescale fiber bundlse is over the capacity of this fiberbundle when the distance is less than 1 cm, and it is possible for the error to become too great for comparative measurement of the object at a distance of more than 6 cm. Moreover, the size of the object to measure is also limited when the lens to object distance is limited, which is below 3-4 cm. Various attempts have been made in intragastric measurement, but all of them were slightly complica ted. With this fiberscope, intragastric measurement is very easy.

A STUDY ON THE TENTATIVE MODEL OF FGS WITH SCALE(FGS-BLG)

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