Micro Leads cuff measurements
We collected and measured images of 200, 300, and 400 µm Micro-Leads Neuro cuffs (Somerville, MA) (Figure A and Table A).
Figure A. Micro-Leads cuff measurements taken for 200, 300, and 400 µm inner diameter cuffs. Inner diameter (ID) displacement is defined from the center of the circle of the outer diameter (OD) to the center of the semi-circle for the inner diameter.
Table A. Cuff measurements (units: micrometer) for 200, 300, and 400 µm inner diameter Micro-Leads cuffs.
Cross-Sectional Measurements | Longitudinal Measurements | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Cuff | # cuff measured | OD | ID | ID Displacement (x) | Peak (x) | Tangent (x) | Gap (y) | End Insulation | Contact Width | Contact Spacing |
200 μm | 6 bipolar | 1080 | 210 | 135 | 15 | 175 | 30 | 295 | 590 | 305 |
300 μm | 12 bipolar, 2 tripolar | 1190 | 265 | 130 | 30 | 255 | 40 | 415 | 680 | 390 |
400 μm | 4 bipolar | 1605 | 465 | 325 | 0 | 200 | 35 | 535 | 745 | 475 |
We also collected and measured images of 100 µm Micro-Leads cuffs, which had a different cross section from the larger diameter cuffs and are therefore reported separately (Figure B and Table B).
Figure B. Micro-Leads cuff measurements taken for 100 µm inner diameter cuffs. Inner diameter (ID) displacement is defined from the center of the circle of the outer diameter (OD) to the center of the semi-circle for the inner diameter.
Table B. Cuff measurements (units: micrometer) for 100 µm inner diameter Micro-Leads cuffs.
Cross-Sectional Measurements | Longitudinal Measurements | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Cuff | # cuff measured | OD | ID | Trapezoid Base | Tangent (x) | Gap (y) | ID Displacement (x) | End Insulation | Contact Width | Contact Spacing |
200 μm | 6 | 1060 | 125 | 200 | 85 | 30 | 210 | 180 | 320 | 150 |
For all “preset” cuff JSON files based on our Micro-Leads cuff measurements, we recessed the contacts by 50 µm. Though we were not able to directly measure the recess depth of the contacts, Micro-Leads informed us that the surface of the electrode metal could never be recessed by more than ~60-70 µm.