nurseCommunicator© is available in a stand alone version. from the Apple App Store. Click here to see. This means that there is no requirement to be connected to a nurses' server. Rather than messages being sent, they are displayed to a caregiver who is in the patient room. This helps those who cannot speak or cannot speak the language communicate their needs to caregivers.
Using Apple's excellent accessability technology, "VoiceOver", this also means that those whose vision is imparied may also use this system to communicate with care givers.
This will go some way to reducing the enormous fear that blind and vision impaired people must feel when intubated for any reason.