Section 4 presents the measurement results obtained in order to validate the performance of the ECG device, as well as to perform a radioplanning analysis of the optimal location within the operational environment of the HOLTIN system. Finally, Section 5 lists the conclusions of the work.2.?Description of the HOLTIN Service’s ArchitectureThe HOLTIN platform consists of a wearable ECG device, a smartphone (data Gateway), a server (data management center) and a set of connecting monitoring clients. The platform shows highly innovative features such as multisystem wireless connectivity, wearable technology and health data management. Besides this technological platform, the service includes a functional model with a detailed description of system operation according to healthcare professional requirements.
The elements of the HOLTIN platform are the following (see Figure 1):Wearable ECG recorder. This device is placed on patient’s chest through several disposable wet electrodes avoiding the uncomfortable connection leads used in convetional AECG systems (Figure 2). It performs the ECG waveform (lead II) acquisition, detection of outstanding arrhythmias and its transmission to a Smartphone device via Bluetooth? v2.1 + EDR wireless technology. The ECG recorder has been designed in a small form factor, very low power consumption and high ergonomics in order to improve the patient comfort level.Figure 2.Image of the HOLTIN wearable ECG recorder (a) placed on a patient chest (b) detail of the device.Smartphone. This gateway device is implemented in a commercial Smartphone with customized service software based on Android 4.
0 OS. It receives the acquired ECG data and transmits it to the data management center. This transmission is perfomed via 3G mobile telecomunications technology and a propietary application-level protocol based on commands. The Smartphone also performs tasks related to functional operation of HOLTIN service: mainly ECG recorder association, malfunction warnings, and operation messages.Management center. This system receives the patients’ ECG data and stores it in a database together with demographic information. In this way, healthcare professionals diagnose the patients using online personalized tools.Figure 1.Overview of the HOLTIN platform.It is worthwhile to pay attention to several features of the system.
On one hand, the use of a wearable acquisition device provides the patient Carfilzomib with high comfort and mobility levels. On other hand, the use of a short-range wireless technology for communication between ECG recorder and Smartphone device increases the overall functionality in terms of mobility and battery lifetime. In this sense, Bluetooth? technology provides the whole technical features (frequency hopping spread spectrum, low power consumption, authentication and data encryption, flow control, etc.