Cystoscopy, with removal of ureteric stent and ureteric catheterisation, unilateral: (a) guided by fluoroscopic imaging of the upper urinary tract; and (b) including either or both of the following: (i) ureteric dilatation; (ii) insertion of ureteric stent of ureter or of renal pelvis; other than a service associated with a service to which item 36818, 36821, 36830 or 36833 applies (H) (Anaes.) (Assist.)