An apparatus facilitating intranasal treatment of a patient's sphenopalatine/pterygopalatine recess, the apparatus comprising, in combination: a sheath hub having an exterior surface opposing an interior surface, wherein the interior surface defines a catheter hub receiving space; a catheter hub slideably received within the catheter hub receiving space, wherein the catheter hub is positionable along a longitudinal axis of the sheath hub; a sheath coupled to the sheath hub and a catheter coupled to the catheter hub and received within the sheath, wherein the catheter includes an insertion end and a coupling end, the insertion end having an intrinsic curvature with respect to a longitudinal axis of the catheter, wherein the catheter hub is positionable between an inserted position and an extended position and the sheath straightens the intrinsic curvature of the catheter, when the catheter hub is positioned in the extended position, an arresting element on one of the catheter hub and the sheath hub; and an engagement element on the other of the catheter hub and the sheath hub, wherein the arresting element continuously engages the engagement element when the catheter hub is repositioned along the longitudinal axis of the sheath hub and wherein engagement between the arresting element and the engagement element prevents rotation of the sheath hub with respect to the catheter hub, characterized in that the catheter hub comprises a manipulation portion, an insertion portion and a coupling portion, wherein the manipulation portion has an increased diameter with respect to the insertion portion and is positioned between the coupling portion and the insertion portion, wherein the insertion portion begins at a stopping surface of the catheter hub and extends to a treatment delivery end, and wherein the stopping surface of the catheter hub contacts the sheath hub to arrest further insertion of the catheter hub within the catheter hub receiving space when the insertion portion of the catheter hub is fully inserted into the catheter hub receiving space. a sheath hub having an exterior surface opposing an interior surface, wherein the interior surface defines a catheter hub receiving space; a catheter hub slideably received within the catheter hub receiving space, wherein the catheter hub is positionable along a longitudinal axis of the sheath hub; a sheath coupled to the sheath hub and a catheter coupled to the catheter hub and received within the sheath, wherein the catheter includes an insertion end and a coupling end, the insertion end having an intrinsic curvature with respect to a longitudinal axis of the catheter, wherein the catheter hub is positionable between an inserted position and an extended position and the sheath straightens the intrinsic curvature of the catheter, when the catheter hub is positioned in the extended position, an arresting element on one of the catheter hub and the sheath hub; and an engagement element on the other of the catheter hub and the sheath hub, wherein the arresting element continuously engages the engagement element when the catheter hub is repositioned along the longitudinal axis of the sheath hub and wherein engagement between the arresting element and the engagement element prevents rotation of the sheath hub with respect to the catheter hub, characterized in that the catheter hub comprises a manipulation portion, an insertion portion and a coupling portion, wherein the manipulation portion has an increased diameter with respect to the insertion portion and is positioned between the coupling portion and the insertion portion, wherein the insertion portion begins at a stopping surface of the catheter hub and extends to a treatment delivery end, and wherein the stopping surface of the catheter hub contacts the sheath hub to arrest further insertion of the catheter hub within the catheter hub receiving space when the insertion portion of the catheter hub is fully inserted into the catheter hub receiving space.