an urban-type settlement in Kel’badzhar Raion, Azerbaijan SSR; balneological health resort.
Istisu is located in the Lesser Caucasus at an altitude of 2, 200–2, 400 m, in the gorge of the Terter River (Kura basin), 166 km southwest of the railroad station of Barda, with which it is linked by motor road. Summers are moderately warm (average July temperature of 16°-18°C), winters are rather mild (average January temperature of — 6°C), and precipitation amounts to about 600 mm a year. The therapeutic agent is hot carbonated mineral water close in composition to that of Karlovy Vary in Czechoslovakia and Dzhermuk in the Armenian SSR:
The water of the mineral springs is used for drinking therapy and baths and is bottled. Treatment is available for patients with digestive disorders and metabolic disturbances, as well as attendant diseases of the locomotive organs and nervous system and gynecological ailments. Istisu water yields a salt which is used to combat chronic constipation, liver and gallbladder complaints, and gastritis conditions involving abnormal secretion ofgastric juice. Facilities include sanatoriums, a bathhouse, and drinking installations.