Implants using ultrasonic backscatter for sensing physiological conditions
First Claim
1. A temperature-sensing system, comprising:
- (a) an implantable device, comprising;
a temperature sensor configured to detect an internal body temperature; and
an ultrasonic transducer with a length of 5 mm or less in the longest dimension, the ultrasonic transducer configured to receive ultrasonic waves that power the implantable device, receive a current modulated based on the temperature detected by the sensor, and emit a temperature-dependent ultrasonic backscatter based on the current received by the ultrasonic transducer; and
(b) an interrogator comprising one or more ultrasonic transducers configured to transmit the ultrasonic waves that power the implantable device, and receive the temperature-dependent ultrasonic backscatter from the implantable device.
1 Assignment
0 Petitions
Accused Products
Abstract
Described herein is an implantable device having a sensor configured to detect an amount of an analyte, a pH, a temperature, strain, or a pressure; and an ultrasonic transducer with a length of about 5 mm or less in the longest dimension, configured to receive current modulated based on the analyte amount, the pH, the temperature, or the pressure detected by the sensor, and emit an ultrasonic backscatter based on the received current. The implantable device can be implanted in a subject, such as an animal or a plant. Also described herein are systems including one or more implantable devices and an interrogator comprising one or more ultrasonic transducers configured to transmit ultrasonic waves to the one or more implantable devices or receive ultrasonic backscatter from the one or more implantable devices. Also described are methods of detecting an amount of an analyte, a pH, a temperature, a strain, or a pressure.
-
Citations
28 Claims
-
1. A temperature-sensing system, comprising:
-
(a) an implantable device, comprising; a temperature sensor configured to detect an internal body temperature; and an ultrasonic transducer with a length of 5 mm or less in the longest dimension, the ultrasonic transducer configured to receive ultrasonic waves that power the implantable device, receive a current modulated based on the temperature detected by the sensor, and emit a temperature-dependent ultrasonic backscatter based on the current received by the ultrasonic transducer; and (b) an interrogator comprising one or more ultrasonic transducers configured to transmit the ultrasonic waves that power the implantable device, and receive the temperature-dependent ultrasonic backscatter from the implantable device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A method of detecting a temperature, comprising:
-
powering one or more implantable devices implanted in a subject using ultrasonic waves emitted from an interrogator comprising one or more transducers, wherein the one or more implantable devices each comprise an ultrasonic transducer with a length of 5 mm or less in the longest dimension and a temperature sensor; converting energy from the ultrasonic waves into an electrical current; transmitting the electrical current to the temperature sensor; measuring the temperature using the temperature sensor; modulating the electrical current based on the measured temperature; transducing the modulated electrical current into an ultrasonic backscatter that encodes the measured temperature; emitting the ultrasonic backscatter to the interrogator; and receiving the ultrasonic backscatter. - View Dependent Claims (20, 21, 22, 23)
-
-
24. A method of detecting a temperature, comprising:
-
powering one or more implantable devices implanted in a subject using ultrasonic waves emitted from an interrogator comprising one or more transducers, wherein the one or more implantable devices each comprise an ultrasonic transducer with a length of 5 mm or less in the longest dimension and a temperature sensor; converting energy from the ultrasonic waves into an electrical current; measuring the temperature using the temperature sensor; modulating the electrical current based on the measured temperature; transducing the modulated electrical current into an ultrasonic backscatter that encodes the measured temperature; and emitting the ultrasonic backscatter to the interrogator; and receiving the ultrasonic backscatter. - View Dependent Claims (25, 26, 27, 28)
-
Specification