If it is a 2D sketch, save as the sketch to DWG/ DXF and import the same into Space claim/ Design modeler of Ansys. If it is a 3D sketch save it as a Creo part and import the same in Space claim/ Design modeler.
save it as a dwg/dxf from http://support.ptc.com/help/creo/creo_pma/usascii/index.html#page/data_exchange/interface/About_Exporting_Drawings_to_DXF_or_DWG_Files.html