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598 Comparison of optics and performance of a distal sensor high definition cystoscope, a distal sensor standard definition cystoscope and a fiberoptic cystoscope
598
Comparison of optics and performance of a distal sensor high definition cystoscope, a distal sensor standard definition cystoscope and a fiberoptic cystoscope Eur Urol Suppl 2013;12;e598
Lusch A., Greene P., Alipanah R., Perez-Lanzac De Lorca A., McDougall E.M., Landman J. University of California, Irvine, Dept. of Urology, Orange, United States of America INTRODUCTION & OBJECTIVES: We evaluated performance characteristics and optics of a new generation high definition distal sensor flexible cystoscope (HD-DS), a standard definition distal sensor cystoscope (SD-DS) and a standard fiberoptic cystoscope (FO). MATERIAL & METHODS: Three new cystoscopes (HD-DS, SD-DS and FO) were compared for active deflection, irrigation flow and optical characteristics. Each cystoscope was evaluated with an empty working channel and with various accessories. Optical characteristics (resolution, grayscale imaging, color representation, depth of field and image brightness) were measured using USAF/Edmund optics test targets and illumination meter. We digitally recorded a porcine cystoscopy in both clear and 2 different standardized blood fields, with subsequent video analysis by 8 expert urologists via questionnaire. RESULTS:
The HD-DS had a higher resolution than the SD-DS and the FO at both 20mm (6.35 vs. 4.00 vs. 2.24 lines/mm) and 10mm (14.3 vs. 7.13 vs. 4.00) evaluations, respectively (p<0.00005, p<0.00005) [Table 1]. Color representation, depth of field (p=0.00001, p<0.00005) was better in the HD-DS [Figure 1]. When compared to the FO, the HD-DS and SD-DS demonstrated superior deflection up and irrigant flow with and without accessory present in the working channel, whereas image brightness was superior in the FO (p<0.00005, p=0.00003, p<0.00005). Observers deemed the HD-DS
cystoscope superior in visualization in clear and bloody fields, for illumination, resolution, as well as for the overall performance.
Table 1:Optical results Figure 1:Resolution, color representation
CONCLUSIONS: In this initial laboratory experience, the new HD distal sensor cystoscope provided significantly improved visualization in clear and bloody field, resolution, color representation and depth of field compared to SD distal sensor and the fiberoptic cystoscope. Clinical correlation of these findings is pending.
Comparison of optics and performance of a distal sensor high definition cystoscope, a distal sensor standard definition cystoscope and a fiberoptic cystoscope Eur Urol Suppl 2013;12;e598
Lusch A., Greene P., Alipanah R., Perez-Lanzac De Lorca A., McDougall E.M., Landman J. University of California, Irvine, Dept. of Urology, Orange, United States of America INTRODUCTION & OBJECTIVES: We evaluated performance characteristics and optics of a new generation high definition distal sensor flexible cystoscope (HD-DS), a standard definition distal sensor cystoscope (SD-DS) and a standard fiberoptic cystoscope (FO). MATERIAL & METHODS: Three new cystoscopes (HD-DS, SD-DS and FO) were compared for active deflection, irrigation flow and optical characteristics. Each cystoscope was evaluated with an empty working channel and with various accessories. Optical characteristics (resolution, grayscale imaging, color representation, depth of field and image brightness) were measured using USAF/Edmund optics test targets and illumination meter. We digitally recorded a porcine cystoscopy in both clear and 2 different standardized blood fields, with subsequent video analysis by 8 expert urologists via questionnaire. RESULTS:
The HD-DS had a higher resolution than the SD-DS and the FO at both 20mm (6.35 vs. 4.00 vs. 2.24 lines/mm) and 10mm (14.3 vs. 7.13 vs. 4.00) evaluations, respectively (p<0.00005, p<0.00005) [Table 1]. Color representation, depth of field (p=0.00001, p<0.00005) was better in the HD-DS [Figure 1]. When compared to the FO, the HD-DS and SD-DS demonstrated superior deflection up and irrigant flow with and without accessory present in the working channel, whereas image brightness was superior in the FO (p<0.00005, p=0.00003, p<0.00005). Observers deemed the HD-DS
cystoscope superior in visualization in clear and bloody fields, for illumination, resolution, as well as for the overall performance.
Table 1:Optical results Figure 1:Resolution, color representation
CONCLUSIONS: In this initial laboratory experience, the new HD distal sensor cystoscope provided significantly improved visualization in clear and bloody field, resolution, color representation and depth of field compared to SD distal sensor and the fiberoptic cystoscope. Clinical correlation of these findings is pending.