Systems and methods of secure communication of data from medical devices
Disclosed systems and methods include electronic devices attached to a patient or object that transmit data to other devices over a secure communication channel. The devices can track and/or monitor object(s) and/or patient(s) and transmit the tracked and/or monitored data to other electronic devices. Such data can include monitored patient physiological parameter(s) received and/or sensed by the device, for example. A master of the two devices transmits a communication signal to another device that, in response, initiates a secure wireless communication channel, causes one or more modules on the device to be powered, and, when powered, transmits the tracked and/or sensed physiological data over the secure wireless communication channel to the master device. Some example master devices transmit the communication signal with an instruction to the device to activate an onboard power source that later may be disconnected after the tracked and/or physiological data is transmitted.
1. A wearable device, comprising:
a first transceiver configured to:
receive, from an external device within a threshold distance of the wearable device,
a first signal inducing a current below a threshold current in the wearable device; and
based on the current induced by the first signal, receive, from the external device,
a second signal inducing a current at or above the threshold current in the wearable device;
a sensor configured to detect a physiological parameter of a patient;
a second transceiver configured to establish a secure communication channel with the external device and to transmit data indicating the physiological parameter to the external device over the secure communication channel;
an energy source configured to supply power to the sensor and to the second transceiver; and
a switch configured to connect the energy source to the sensor and to the second transceiver based on the first transceiver receiving the second signal, the physiological parameter being detected based on the energy source being connected to the sensor, the data indicating the physiological parameter being transmitted based on the energy source being connected to the second transceiver.
2. The wearable device of claim 1 , wherein the sensor is a temperature sensor, an electrocardiogram (ECG) sensor, a non-invasive blood pressure (NIBP) sensor, or a pulse oximetry sensor.
3. The wearable device of claim 1 , wherein the energy source comprises a battery or a capacitor.
4. The wearable device of claim 1 , wherein the switch comprises a metal-oxide semiconductor field-effect transistor (MOSFET).
5. The wearable device of claim 1 , wherein the switch comprises an electro-mechanical switch.
6. The wearable device of claim 1 , wherein the switch is configured to be actuated by a user.
7. The wearable device of claim 1 , wherein the first signal comprises a radio frequency (RF) signal.
8. The wearable device of claim 1 , wherein the first transceiver is further configured to receive a third signal, subsequent to the second signal, and
wherein the switch is further configured to disconnect the sensor and the second transceiver from the energy source based on the third signal.
9. The wearable device of claim 1 , wherein the second transceiver is further configured to establish the secure communication channel with the external device when the second transceiver is activated.
10. The wearable device of claim 9 , wherein the first transceiver is further configured to receive a pairing code that pairs the wearable device with the external device over the secure communication channel.
11. The wearable device of claim 1 , wherein the energy source comprises a capacitor configured to store energy from the current induced by the second signal.
12. The wearable device of claim 1 , wherein, based on the wearable device being activated, the second transceiver is configured to establish the secure communication channel by transmitting authentication or synchronization information to the external device.
13. The wearable device of claim 1 , wherein:
the first transceiver is configured to receive a third signal at an interval of time after the second signal, the interval of time being determined by the external device based on the wearable device being activated; and
based on the third signal, the second transceiver is configured to transmit second data indicating a second physiological parameter to the external device.
14. A system comprising:
an external device configured to transmit a first signal and a second signal; and
a wearable device comprising:
a first transceiver configured to:
receive, from the external device within a threshold distance of the wearable device, the first signal inducing a current below a threshold current in the wearable device; and
based on the current induced by the first signal, receive, from the external device, a second signal inducing a current at or above the threshold current in the wearable device;
a sensor configured to detect a physiological parameter of a patient;
a second transceiver configured to establish a secure communication channel with the external device and to transmit data indicating the physiological parameter to the external device over the secure communication channel;
an energy source configured to supply power to the sensor and to the second transceiver; and
a switch configured to connect the energy source to the sensor and to the second transceiver based on the first transceiver receiving the second signal, the physiological parameter being detected based on the energy source being connected to the sensor, the data indicating the physiological parameter being transmitted based on the energy source being connected to the second transceiver.
15. The system of claim 14 , wherein the wearable device is configured to establish the secure communication channel with the external device based on a pairing code received from the external device.
16. The system of claim 14 , wherein the sensor comprises a temperature sensor, an electrocardiogram (ECG) sensor, a non-invasive blood pressure (NIBP) sensor, or a pulse oximetry sensor.
17. The system of claim 14 , wherein the energy source comprises a capacitor configured to store energy from the current induced by the second signal.
18. The system of claim 14 , wherein, based on the wearable device being activated, the second transceiver is configured to establish the secure communication channel by transmitting authentication or synchronization information to the external device.
19. A method comprising:
receiving, by a first transceiver of a wearable device and from an external device within a threshold distance of the wearable device, a first signal inducing a current below a threshold current in the wearable device; and
based on the current induced by the first signal, receiving, by the first transceiver and from the external device, a second signal inducing a current at or above the threshold current in the wearable device;
detecting, by a sensor of the wearable device, a physiological parameter of a patient;
establishing, by a second transceiver of the wearable device, a secure communication channel with the external device;
transmitting, by the second transceiver, data indicating the physiological parameter to the external device over the secure communication channel; and
connecting, by a switch, an energy source to the sensor and to the second transceiver based on the first transceiver receiving the second signal, the energy source supplying power to the sensor and the second transceiver based on the energy source being connected to the sensor and to the second transceiver, the physiolociical parameter being detected based on the energy source being connected to the sensor, the data indicating the physiolociical parameter being transmitted based on the energy source being connected to the second transceiver.
20. The method of claim 19 , further comprising:
disconnecting, by the switch, the energy source from the sensor and from the second transceiver.