The invention relates to a device (1) so as to be used in the treatment of renal calculus smaller than 20 mm, comprising at least one control arm so as to enable the operator who performs the renal calculus lithotripsy operation to manage said operation (1.1), at least one laser probe so as to apply lithotripsy for renal calculus (1.6), at least one flexible telescope (1.5) so as to monitor the region instantly where lithotripsy is performed, at least one first operation channel (1.3) in which flexible telescope (1.5) is located, at least one second operation channel (1.4) in which laser probe (1.6) is located and at least one lock system (1.7) that fixes said flexible telescope (1.5) and laser probe (1.6).
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