Details
| Original language | English |
|---|---|
| Pages (from-to) | 89-92 |
| Number of pages | 4 |
| Journal | Current Directions in Biomedical Engineering |
| Volume | 7 |
| Issue number | 2 |
| Publication status | Published - 1 Oct 2021 |
Abstract
As recently demonstrated, a passive Gough-Stewart platform (a.k.a. hexapod) can be used to create a personalized surgical template to achieve minimally invasive access to the cochlea. The legs of the hexapod are manually adjusted to the desired length, which must be read off an analog scale. Previous experiments have shown that manual length setting of the hexapod's legs is error-prone because of the imprecise readability of the analog scale. The objective of this study is to determine if integration of a linear encoder and digitally displaying the measured length help reduce the length setting error. Two experiments were conducted where users set the leg length manually. In both experiments, the users were asked to set the leg length to 20 nominal values using the whole setting range from 0 mm to 10 mm. In the first experiment, users had to rely only on the analog scale; in the second experiment, the electronic display additionally showed the user the actual leg length. Results show that the mean length setting error without using the digital display and only relying on the analog scale was (0.036 ± 0.020) mm (max: 0.107 mm) in contrast to (0.001 ± 0.000) mm (max: 0.002 mm) for the experiment with the integrated digital measurement system. The results support integration of digital length measurement systems as a promising tool to increase the accuracy of surgical template fabrication and thereby patients' safety. Future studies must be conducted to evaluate if integration of a linear encoder in each of the six legs is feasible.
Keywords
- accuracy setting, digital display, hexapod, length measurement, length setting error, linear encoder
ASJC Scopus subject areas
- Engineering(all)
- Biomedical Engineering
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In: Current Directions in Biomedical Engineering, Vol. 7, No. 2, 01.10.2021, p. 89-92.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Reducing the manual length setting error of a passive Gough-Stewart platform for surgical template fabrication using a digital measurement system
AU - Kilian, Julia
AU - Blum, Tobias
AU - Laves, Max Heinrich
AU - Ortmaier, Tobias
AU - Lenarz, Thomas
AU - Rau, Thomas S.
PY - 2021/10/1
Y1 - 2021/10/1
N2 - As recently demonstrated, a passive Gough-Stewart platform (a.k.a. hexapod) can be used to create a personalized surgical template to achieve minimally invasive access to the cochlea. The legs of the hexapod are manually adjusted to the desired length, which must be read off an analog scale. Previous experiments have shown that manual length setting of the hexapod's legs is error-prone because of the imprecise readability of the analog scale. The objective of this study is to determine if integration of a linear encoder and digitally displaying the measured length help reduce the length setting error. Two experiments were conducted where users set the leg length manually. In both experiments, the users were asked to set the leg length to 20 nominal values using the whole setting range from 0 mm to 10 mm. In the first experiment, users had to rely only on the analog scale; in the second experiment, the electronic display additionally showed the user the actual leg length. Results show that the mean length setting error without using the digital display and only relying on the analog scale was (0.036 ± 0.020) mm (max: 0.107 mm) in contrast to (0.001 ± 0.000) mm (max: 0.002 mm) for the experiment with the integrated digital measurement system. The results support integration of digital length measurement systems as a promising tool to increase the accuracy of surgical template fabrication and thereby patients' safety. Future studies must be conducted to evaluate if integration of a linear encoder in each of the six legs is feasible.
AB - As recently demonstrated, a passive Gough-Stewart platform (a.k.a. hexapod) can be used to create a personalized surgical template to achieve minimally invasive access to the cochlea. The legs of the hexapod are manually adjusted to the desired length, which must be read off an analog scale. Previous experiments have shown that manual length setting of the hexapod's legs is error-prone because of the imprecise readability of the analog scale. The objective of this study is to determine if integration of a linear encoder and digitally displaying the measured length help reduce the length setting error. Two experiments were conducted where users set the leg length manually. In both experiments, the users were asked to set the leg length to 20 nominal values using the whole setting range from 0 mm to 10 mm. In the first experiment, users had to rely only on the analog scale; in the second experiment, the electronic display additionally showed the user the actual leg length. Results show that the mean length setting error without using the digital display and only relying on the analog scale was (0.036 ± 0.020) mm (max: 0.107 mm) in contrast to (0.001 ± 0.000) mm (max: 0.002 mm) for the experiment with the integrated digital measurement system. The results support integration of digital length measurement systems as a promising tool to increase the accuracy of surgical template fabrication and thereby patients' safety. Future studies must be conducted to evaluate if integration of a linear encoder in each of the six legs is feasible.
KW - accuracy setting
KW - digital display
KW - hexapod
KW - length measurement
KW - length setting error
KW - linear encoder
UR - http://www.scopus.com/inward/record.url?scp=85121837701&partnerID=8YFLogxK
U2 - 10.1515/cdbme-2021-2023
DO - 10.1515/cdbme-2021-2023
M3 - Article
AN - SCOPUS:85121837701
VL - 7
SP - 89
EP - 92
JO - Current Directions in Biomedical Engineering
JF - Current Directions in Biomedical Engineering
IS - 2
ER -