Always speak with your airline regarding the medical equipment you want to bring aboard at least 48 hours in advance of your flight.
If using suction equipment remember to take spare tubing, yankeurs, canister, lid and rubber depending on the type used. You may want to label the container or bag that houses the suction equipment, with your mobile number or email address. Ensure the battery is fully charged and that you have spares should the journey take longer than anticipated.
Take a the car charger if you have one so the unit can be charged in the car when travelling if necessary. Remember to take a voltage adapter so you can charge the unit in your accommodation.