Journal: Science translational medicine

Article Title: Wireless sensors for continuous, multimodal measurements at the skin interface with lower limb prostheses

doi: 10.1126/scitranslmed.abc4327

Figure Lengend Snippet: (A) Schematic illustration of the overall system. (B) Illustration of wireless, battery-free multimodal sensors on a residual limb and near-field communication (NFC)/Bluetooth low energy (BLE) modules on the outer surface of a prosthetic socket. (C) Picture of NFC/BLE modules on a socket worn by a person with amputation. (D) Picture of an NFC/BLE module attached to a socket. (E) Optical image of a multimodal sensor highlighting its flexible and thin form factor. (F) Functional block diagram showing three parts of the system: wireless, battery-free multimodal sensors; NFC/BLE module; and portable electronic device with GUI. SPI, Serial Peripheral Interface.

Article Snippet: The host module on the prosthetic socket included an NFC reader (TRF79×0ATB, Texas Instruments) to provide wireless power transmission and data communication with the sensing device inside the socket, and a BLE system that transfers data obtained from the reader to a separate PC tablet with a custom GUI for data visualization and storage ( fig. S29A ).

Techniques: Battery, Functional Assay, Blocking Assay

Journal: Science translational medicine

Article Title: Wireless sensors for continuous, multimodal measurements at the skin interface with lower limb prostheses

doi: 10.1126/scitranslmed.abc4327

Figure Lengend Snippet: (A) Schematic illustrations of a non-amputee participant with three sensors on the right leg and NFC/BLE modules on the outside surface of a prosthesis simulator. (B) Pictures of a prosthesis simulator with attached NFC/BLE modules. (C) Representative pressure data collected while in a sitting position. (D) Representative pressure data collected while in a standing position. (E) Representative pressure data collected while walking on a treadmill (0.67 m/s). (F) Comparison of pressure data from the wireless sensor and from a wired pressure sensor array as a reference during leg flexing (90°). (G) Bland-Altman plot for pressure data from the wireless sensor and from the wired reference during leg flexing. (H) Temperature data from the wireless sensor and from a wired thermocouple as a reference collected while sitting, standing, and walking on a treadmill (0.67 m/s). All data were collected on two individuals, separately (n = 2).

Article Snippet: The host module on the prosthetic socket included an NFC reader (TRF79×0ATB, Texas Instruments) to provide wireless power transmission and data communication with the sensing device inside the socket, and a BLE system that transfers data obtained from the reader to a separate PC tablet with a custom GUI for data visualization and storage ( fig. S29A ).

Techniques: Comparison

Journal: Science translational medicine

Article Title: Wireless sensors for continuous, multimodal measurements at the skin interface with lower limb prostheses

doi: 10.1126/scitranslmed.abc4327

Figure Lengend Snippet: (A) Schematic illustrations of an individual with transfemoral amputation with three multimodal sensors on the residual limb and NFC/BLE modules on the prosthesis. (B) Pictures of the transfemoral residual limb with wireless sensors adhered to different locations. (C) Pictures of a prosthesis with attached NFC/BLE modules. (D) Pictures of the participant during three different activities. (E) Representative pressure data collected while in a sitting position. (F) Representative pressure data collected while in a standing position. (G) Representative pressure data collected while walking on a treadmill at a slow self-selected speed (0.39 m/s). (H) Representative pressure data collected while walking on a treadmill at a fast self-selected speed (0.88 m/s). (I) Temperature data collected throughout the testing protocol. All data were collected on a single participant (n = 1).

Article Snippet: The host module on the prosthetic socket included an NFC reader (TRF79×0ATB, Texas Instruments) to provide wireless power transmission and data communication with the sensing device inside the socket, and a BLE system that transfers data obtained from the reader to a separate PC tablet with a custom GUI for data visualization and storage ( fig. S29A ).

Techniques:

Journal: Science translational medicine

Article Title: Wireless sensors for continuous, multimodal measurements at the skin interface with lower limb prostheses

doi: 10.1126/scitranslmed.abc4327

Figure Lengend Snippet: (A) Schematic illustrations of an individual with transtibial amputation with three multimodal sensors on the residual limb and NFC/BLE modules on the prosthesis. (B) Pictures of the transtibial residual limb with wireless sensors adhered to different locations. (C) Picture of a prosthesis with attached NFC/BLE modules. (D) Pictures of the participant during three different activities. (E) Representative pressure data collected while in a sitting position. (F) Representative pressure data collected while in a standing position. (G) Representative pressure data collected while walking on a treadmill at a self-selected slow speed (0.31 m/s). (H) Representative pressure data collected while walking on a treadmill at a self-selected fast speed (0.81 m/s). (I) Temperature data collected throughout the testing protocol. All data were collected on a single participant (n = 1).

Article Snippet: The host module on the prosthetic socket included an NFC reader (TRF79×0ATB, Texas Instruments) to provide wireless power transmission and data communication with the sensing device inside the socket, and a BLE system that transfers data obtained from the reader to a separate PC tablet with a custom GUI for data visualization and storage ( fig. S29A ).

Techniques:

Journal: Bioengineering & Translational Medicine

Article Title: Wearable and battery‐free wound dressing system for wireless and early sepsis diagnosis

doi: 10.1002/btm2.10445

Figure Lengend Snippet: Schematic illustration of the wearable and battery‐free wound dressing system (WDS). (a) Explosive view of the components and assembly method of the WDS. (b–e) Photograph of near‐field communication (NFC)‐based flexible printed circuit board (b), the whole system exhibits great flexibility under bending (c). (d) The optical image of flexible printing circuit board (fPCB) with the integration of Eco‐flex encapsulation layer combined with wound exudate sensor using connector (e). (f) The mechanism of WDS applied on wound for simultaneous monitoring of temperature, pH value, and procalcitonin (PCT). The smart phone is used to wireless power supply, data processing, and transmission. (g) Block diagram and working principle of the wound dressing system. (h) The photograph of WDS applied on the twist, arm, chest, and knee.

Article Snippet: All components, including NFC receiver (ST25DV16K, STMicroelectronics), microcontroller (STM32L011F4, STMicroelectronics), potentiostat amplifier (AD8606, AD), and digital‐to‐analog converter (DAC8562, TI) are all soldered on fPCB using solder paste (CD‐LT 528, Conduction, China) at 138°C.

Techniques: Battery, Encapsulation, Transmission Assay, Blocking Assay