走査型電子顕微鏡による蝸牛血管の立体的観察 : 特に蝸牛軸血管を中心として

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The vascular anatomy of the cochlea had been well investigated since the end of the 18th century on account of its morphological interest. Regarding details of the modiolar vessels, however, only a few literature can be seen though its outline was clarified already.In recent years, scanning electron microscopy has been applied to medical and biological investigations with fruitful results. With a scanning electron microscope the author observed stereographically the cast of the modiolar vessels of guinea pigs reproduced by a corrosion casting technique. It seemed much more useful than the conventional contrast medium injection method in observing fine, complicated and three-dimensional distribution of the blood vessels as in the modiolus.First, u kind of resin (methacrylic methyl ester) was injected into the blood vessels of live guinea pigs. After taking the temporal bone out of the animal, it was decalcified and macerated completely. Then a cast of the cochlear vessels was taken and observed with a scanning electron microscope. A pair of photos differing in the view angle by 7- were taken simultaneously, and observed with a stereoviewer.The results obtained were as follows:1. The arteria cochleae propria taking a various serpentine or winding course runs spirally around the modiolus up to the apex, where it divides into several terminal branches, namely, the radiating arterioles.2. The primary branches of the a. cochleae propria run along the main stem, soon divide into several secondary branches, which further ramify, form spring coils and radiate to the wall of the scala vestibuli or spiral lamina. The radiating arterioles that are ramified from a secondary branch never trespass in those of the neighboring secondary branch.3. Most of the cochlear venous blood is drained to the vena spiralis posterior, but a part of the venous blood from the modiolus is drained to the v. auditiva interna. 4. Half of the specimens show a well developed venous branch which shunts venous blood of the apical turn to the v. spiralis posterior of the third turn.5. The a. cochleae propria and its main branches, especially at the basal and the second turns, give off many small twigs which form capillary mesh around the modiolus. 6. The ganglion spirale reveals a characteristic capillary network.7. A mass of capillaries supplied from tiny twigs of the a. cochleae communis and drained to the v. auditiva interna, are seen in the meatus acusticus internus.
社団法人日本耳鼻咽喉科学会の論文

走査型電子顕微鏡による蝸牛血管の立体的観察 : 特に蝸牛軸血管を中心として

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