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Feasibility analysis of wireless power delivery to implanted sensors of XLIF patients Cover

Feasibility analysis of wireless power delivery to implanted sensors of XLIF patients

International Journal on Smart Sensing and Intelligent Systems
Volume 17 (2024): Issue 1 (January 2024)
By: Subhas C. Mukhopadhyay,  Isaac Senn,  Vivek Ramakrishna,  Boby George,  Gangadhara Prusty and  Ashish Diwan  
Open Access
|Sep 2024

Figures & Tables

Figure 1:

A. Cross-sectional view, B. Normal view. LIF surgery types and their relevant access points [1]. LIF, lumbar interbody fusion.
A. Cross-sectional view, B. Normal view. LIF surgery types and their relevant access points [1]. LIF, lumbar interbody fusion.

Figure 2:

Vertical, horizontal, planar, and angular misalignment [113].
Vertical, horizontal, planar, and angular misalignment [113].

Figure 3:

Piezoresistive sensor array.
Piezoresistive sensor array.

Figure 4:

High power transmitting coil and circuitry.
High power transmitting coil and circuitry.

Figure 5:

Implant standalone version (left) and screwed version (right) [96].
Implant standalone version (left) and screwed version (right) [96].

Figure 6:

Coil V1, V2, and V3 designs using standalone implant geometry.
Coil V1, V2, and V3 designs using standalone implant geometry.

Figure 7:

Vertical misalignment testing setup.
Vertical misalignment testing setup.

Figure 8:

Half-bridge receiver perfectly tuned for 0.4 mm standalone v3 coil.
Half-bridge receiver perfectly tuned for 0.4 mm standalone v3 coil.

Figure 9:

Receiver half-bridge distant dependent CC results through air.
Receiver half-bridge distant dependent CC results through air.

Figure 10:

X-ray of a natural spine [119], kyphosis [118], and lordosis [117].
X-ray of a natural spine [119], kyphosis [118], and lordosis [117].

Figure 11:

Receiver CC results at different distances and angles.
Receiver CC results at different distances and angles.

Figure 12:

Vertical misalignment testing setup using tissue substitutes.
Vertical misalignment testing setup using tissue substitutes.

Figure 13:

Receiver CC results at different distances through tissue.
Receiver CC results at different distances through tissue.

Figure 14:

Temperature sensor setup.
Temperature sensor setup.

Figure 15:

Receiver coil temperature as a function of time.
Receiver coil temperature as a function of time.

PTE and PDL losses due to angular misalignment_

Misalignment (°)Loss in PTE (%)Loss in PDL (%)
000
1524–3424–34
3056–5956–59
6074–8174–81
9095–9795–97

EFM8BB52 microcontroller component current requirements [94]_

ParameterSymbolTypUnit
Normal mode at 80 kHz using low-frequency oscillatorINORMAL612µA
ADC supply current at full speed with 12-bit conversionsIADC250µA
External voltage reference input currentIEXTVREF5µA
Current for VDD divider when VDD used as VREFIVDDRED16µA
DOI: https://doi.org/10.2478/ijssis-2024-0028 | Journal eISSN: 1178-5608
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Language: English
Submitted on: Jun 22, 2024
Published on: Sep 28, 2024
Published by: Professor Subhas Chandra Mukhopadhyay
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year
Keywords:
extreme lateral interbody fusion,
wireless power transfer,
implanted medical device,
polyether ether ketone,
specific absorption rate,
anterior lumbar interbody fusion,
computed tomography,
near field communication,
polydimethylsiloxane
Related subjects:
Engineering,
Introductions and overviews,
Engineering, other

© 2024 Subhas C. Mukhopadhyay, Isaac Senn, Vivek Ramakrishna, Boby George, Gangadhara Prusty, Ashish Diwan, published by Professor Subhas Chandra Mukhopadhyay
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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