Piezo Capsule: Ultrasonic Way of Wireless Pressure Measurement
Heart failure (HF) rates elevate worldwide with the aging population. Miniaturized and wireless implants with real‐time data transfer capability can alleviate the surgical complexities of cardiac pressure monitoring. Despite recent developments of mm‐size implants with complex circuitries and self‐p...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2022-10-01
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| Series: | Advanced Intelligent Systems |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/aisy.202200125 |
| _version_ | 1811252044475924480 |
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| author | Senol Mutlu Amirreza Aghakhani Metin Sitti |
| author_facet | Senol Mutlu Amirreza Aghakhani Metin Sitti |
| author_sort | Senol Mutlu |
| collection | DOAJ |
| description | Heart failure (HF) rates elevate worldwide with the aging population. Miniaturized and wireless implants with real‐time data transfer capability can alleviate the surgical complexities of cardiac pressure monitoring. Despite recent developments of mm‐size implants with complex circuitries and self‐powering units, a simple, passive, and effective implant design for the real‐time pressure reading is missing. Here, the piezo capsule, a simple, cost‐effective, and miniaturized passive ultrasound pressure sensing system, is introduced. The capsule design consists of a 1 mm‐cube‐sized lead zirconate titanate (PZT) transducer and a T‐shaped mechanical pin. The impedance changes of an interrogating ultrasound probe, which is ultrasonically coupled to the receiver implant, correlate to the electrical/mechanical loading of the piezo capsule. The ultrasonic sensing properties of the proposed device are characterized across a hard‐solid medium (e.g., plexiglass) and soft tissue‐like media (e.g., polydimethylsiloxane (PDMS) and chicken breast tissue) and verified the impedance changes using finite element simulations. Last, dynamic wireless pressure readings of an artificial vessel for varying fluid flow pulse‐frequency and volumetric rate are demonstrated. The sensitivity of 0.375 Ω kPa−1 is achieved as the pressure changed from 14 to 86 kPa and pulse frequency from 0 to 100 bpm with a fixed flow rate of 8 mL min−1. |
| first_indexed | 2024-04-12T16:29:02Z |
| format | Article |
| id | doaj.art-23e09b6dab2f4ad3a3f4e730c2ee8e4c |
| institution | Directory Open Access Journal |
| issn | 2640-4567 |
| language | English |
| last_indexed | 2024-04-12T16:29:02Z |
| publishDate | 2022-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Intelligent Systems |
| spelling | doaj.art-23e09b6dab2f4ad3a3f4e730c2ee8e4c2022-12-22T03:25:14ZengWileyAdvanced Intelligent Systems2640-45672022-10-01410n/an/a10.1002/aisy.202200125Piezo Capsule: Ultrasonic Way of Wireless Pressure MeasurementSenol Mutlu0Amirreza Aghakhani1Metin Sitti2Physical Intelligence Department Max Planck Institute for Intelligent Systems Stuttgart 70569 GermanyPhysical Intelligence Department Max Planck Institute for Intelligent Systems Stuttgart 70569 GermanyPhysical Intelligence Department Max Planck Institute for Intelligent Systems Stuttgart 70569 GermanyHeart failure (HF) rates elevate worldwide with the aging population. Miniaturized and wireless implants with real‐time data transfer capability can alleviate the surgical complexities of cardiac pressure monitoring. Despite recent developments of mm‐size implants with complex circuitries and self‐powering units, a simple, passive, and effective implant design for the real‐time pressure reading is missing. Here, the piezo capsule, a simple, cost‐effective, and miniaturized passive ultrasound pressure sensing system, is introduced. The capsule design consists of a 1 mm‐cube‐sized lead zirconate titanate (PZT) transducer and a T‐shaped mechanical pin. The impedance changes of an interrogating ultrasound probe, which is ultrasonically coupled to the receiver implant, correlate to the electrical/mechanical loading of the piezo capsule. The ultrasonic sensing properties of the proposed device are characterized across a hard‐solid medium (e.g., plexiglass) and soft tissue‐like media (e.g., polydimethylsiloxane (PDMS) and chicken breast tissue) and verified the impedance changes using finite element simulations. Last, dynamic wireless pressure readings of an artificial vessel for varying fluid flow pulse‐frequency and volumetric rate are demonstrated. The sensitivity of 0.375 Ω kPa−1 is achieved as the pressure changed from 14 to 86 kPa and pulse frequency from 0 to 100 bpm with a fixed flow rate of 8 mL min−1.https://doi.org/10.1002/aisy.202200125piezoelectricultrasonic couplingultrasonic implantultrasound pressure sensorwireless pressure reading |
| spellingShingle | Senol Mutlu Amirreza Aghakhani Metin Sitti Piezo Capsule: Ultrasonic Way of Wireless Pressure Measurement Advanced Intelligent Systems piezoelectric ultrasonic coupling ultrasonic implant ultrasound pressure sensor wireless pressure reading |
| title | Piezo Capsule: Ultrasonic Way of Wireless Pressure Measurement |
| title_full | Piezo Capsule: Ultrasonic Way of Wireless Pressure Measurement |
| title_fullStr | Piezo Capsule: Ultrasonic Way of Wireless Pressure Measurement |
| title_full_unstemmed | Piezo Capsule: Ultrasonic Way of Wireless Pressure Measurement |
| title_short | Piezo Capsule: Ultrasonic Way of Wireless Pressure Measurement |
| title_sort | piezo capsule ultrasonic way of wireless pressure measurement |
| topic | piezoelectric ultrasonic coupling ultrasonic implant ultrasound pressure sensor wireless pressure reading |
| url | https://doi.org/10.1002/aisy.202200125 |
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