maximum tolerated current level at a frequency of 5 hz and a pulse width of 200 ps for a period of 10 minutes once per day for three consecutive days in the event that the ng tube becomes irredeemably blocked the clip may be disengaged and the ng tube removed completely whilst keeping the sleeve in place a new ng tube may then be inserted until the nex figure is lined up in the printed window of the sleeve and ph testing and x ray carried out to confirm presence of the distal end in the stomach once the therapeutic electrical stimulation treatment regime is complete it may be desirable to remove the sleeve without removal of the ng tube this is achieved as follows the nex number on the surface of the ng tube visible through the printed window of the sleeve is noted the clip securing the sleeve to the ng tube is disengaged and holding the sleeve to prevent its movement additional ng tube is inserted through the sleeve into the patient until a figure equal to nex 20 cm appears in the printed window of the sleeve the clip is then reengaged both sleeve and ng are then slowly removed until the distal end of sleeve emerges from the nostril and the original nex number is visible at the entrance to the nostril this ensures that the distal end of.