Balloon catheter and balloon catheter system

A balloon catheter (15) is provided with a balloon (25), a catheter shaft (28), a heating unit (39), and an electrode temperature sensor (45). The catheter shaft (28) has an outer tube shaft (30) connected to the proximal end (25b) of the balloon (25), and an inner tube shaft (35) extending into the balloon (25) and connected to the distal end (25a) of the balloon (25). And the inner cylinder shaft (35) penetrates through the outer cylinder shaft (30). A gap between the inner cylinder shaft (35) and the outer cylinder shaft (30) constitutes a liquid delivery passage (LP) communicating with the inner space of the balloon (25). The heating unit (39) includes a plurality of heating electrodes (40). A plurality of heating electrodes (40) are distributed on the outer peripheral surface of the inner cylinder shaft (35) in the balloon (25). The electrode temperature sensor (40) is provided within the balloon (25) and acquires information relating to the temperature of the heating electrode (40). 球囊导管(15)具备球囊(25)、导管轴