A surgical device and a method for using the surgical device are disclosed. In an embodiment the device for applying a substance (X) in a hollow space of a body cavity such as a hollow organ, in particular a therapeutic pneumoperitoneum, includes a trocar system with a trocar sleeve, the trocar system having a gas connection to which an insufflation gas-supply line can be connected and a nozzle system, which in its interior forms a lumen with a proximal end and a distal end, wherein the nozzle system has a needle nozzle fixed at the distal end of the lumen, and wherein the nozzle system is guided by the trocar sleeve.
