SYSTEM

1 . A system comprising:

a first module comprising a first sensor, capable of performing biometric sensing at a first location on a patient; and

a second module comprising a second sensor, capable of performing biometric sensing at a second location on the patient,

wherein the first module comprises a transmitter for transmitting first sensor data, the first sensor data comprising sensing information obtained by the first sensor.

2 . The system of claim 1 , comprising:

a third module comprising a receiver, the third module being configured to receive the first sensor data and to combine the first sensor data with other sensor data.

3 . The system of claim 2 , wherein the third module is the second module, and wherein the other sensor data comprises sensing information obtained by the second sensor.

4 . The system of claim 3 wherein the first module comprises a receiver for receiving a signal from the second module.

5 . The system of claim 2 , wherein the third module is a mobile telephone.

6 . The system of claim 5 , wherein the first module comprises a receiver for receiving a signal from the third module.

7 . The system of claim 5 , wherein the other sensor data comprises sensing information obtained by the second sensor.

8 . The system of claim 1 , wherein the transmitter is a wireless transmitter.

9 . The system of claim 8 , wherein the transmitter is a Bluetooth transmitter.

10 . The system of claim 8 , wherein the transmitter is a WiFi transmitter.

11 . The system of claim 8 , wherein the transmitter is a near-field communication transmitter.

12 . The system of claim 1 , wherein the first sensor and/or the second sensor is capable of performing biometric sensing of a type selected from the group consisting of blood sugar measurements, blood glucose measurements, core body temperature measurements, hydration level measurements, blood pressure measurements, heart rate and heart rate variability, SpO2, and combinations thereof.

13 . The system of claim 1 , wherein the first module does not include a receiver.

14 . The system of claim 1 , wherein the first sensor and the second sensor are configured to perform redundant measurements.

15 . The system of claim 1 , wherein the first and second modules are located within a wearable device.

16 . The system of claim 15 , wherein the wearable device includes a wristband, and the first and second modules are located at different circumferential positions around the wristband.

17 . The system of claim 15 , further including an indicator module, configured to provide feedback to a user as to the position of the wearable device on the user.

18 . The system of claim 15 , further including an adjustment mechanism to vary a dimension of the wearable medical device.

19 . The system of claim 15 , wherein the wearable medical device is a wristband, including, or being connectable to, a watch module configured to display the time, the wristband being arranged such that the watch module is or would be disposed on a dorsal portion of a wristband and the first and second modules are disposed on a radial or ulnar portion of the wristband.

20 . The system of claim 1 , wherein the first sensor and the second sensor are configured to perform biometric sensing of a same type on different locations of the patient.

21 . The system of claim 20 , wherein one or both of the first module and the second module is configured to derive a biomarker value from sensor data from both the first sensor and the second sensor.

22 . The system of claim 20 , wherein one or both of the first module and the second module is configured to receive sensor data from both the first sensor and the second sensor, and to derive a biomarker value from the sensor data from only one first and second sensor.