A device to secure a tube inserted into a patient is provided. For example one set may comprise adjectives, another participles, another nouns. Adsorption takes place whether the engine is running or not. The digital control logic receives digital physiologic data sampled at different rates, assembles the data into physiologic data packets, time-stamps at least some of the packets, and periodically stores the packets in a digital memory. A corresponding method of generating syndromes from readback data is provided.