A catheter 10 comprising a pair of electrodes 12a,12b spaced apart between the catheters proximal and distal ends. The catheter further comprises a catheter guide comprising a first positioning indicator 14a distal to the electrodes for indicating if the catheter needs inserting further into a patient and a second positioning indicator 14b proximate the first indicator for indicating correct positioning of the catheter. The first indicator may comprise a first marker or a band extending around the circumference of the catheter and having a first visual characteristic. The second indicator may comprise a second marker extending around the catheter circumference and having a second visual characteristic, different to the first. The catheter guide may further comprise a third positioning indicator 14c proximate the second indicator for indicating if the catheter has been inserted too far into the patient. The catheter guide may be located on the catheter surface. The catheter guide may be used as a visual positioning aid. The catheter may treat dysphagia. The indicators may be luminescent or fluorescent or may be reactive or reflective in the presence of white, coloured or ultraviolet light. The indicators may be formed from an ink, a film or a coating.
