Abstract: An interventional ablation device (1) is proposed to comprise an ablation needle (3) with an elongated body (5) and a handle (7). Adjacent to an ablation element (9) provided on the body (5), at least one or preferably two or more sensors (11-21) are provided, preferably at both of opposing sides of the ablation element (9). The ablation device (1) is adapted for detecting physiological information of tissue (27, 29, 31) surrounding an ablation site (33) based on measurement values provided by the sensors. E.g., optical sensors may be used to measure a reflectance spectrum indicating whether the adjacent tissue is healthy tissue (31), tumorous tissue (27) or ablated tissue (29). Using such information, an ablation process may be controlled.