Illumination matters Part II: advanced comparative analysis of flexible ureteroscopes in a kidney model by PEARLS.
World J Urol
; 42(1): 298, 2024 May 06.
Article
in En
| MEDLINE
| ID: mdl-38709327
ABSTRACT
PURPOSE:
The aim of the study was to evaluate illumination properties in an in-vitro kidney calyx model in saline. DESIGN ANDMETHODS:
We evaluated a series of contemporary flexible ureteroscopes including the Storz Flex-Xc and Flex-X2s, Olympus V3 and P7, Pusen 7.5F and 9.2F, as well as OTU WiScope using a 3D-printed closed pink kidney calyx model, submerged in saline. A spectrometer was used for illuminance and color temperature measurements at different openings located at center (direct light), 45° (direct and indirect light) and 90°(indirect light) to the axis of the scope.RESULTS:
Maximum illuminance was at the center opening for all scopes (range 284 to 12,058 lx at 50% brightness and 454 to 11,871 lx at 100% brightness settings). The scope with the highest center illuminance (Flex-Xc) was 26 times superior to the scope with the lowest illuminance (Pusen 7.5Fr) at 100% brightness setting. For each scope, there was a peripheral illuminance drop ranging from - 43 to - 92% at 50% brightness and - 43% to - 88% at 100% brightness settings, respectively (all p < 0.01). Highest drop was for the P7 and the Pusen 9.2F. All scopes had illuminance skew, except the V3. All scopes had a warm color temperature.CONCLUSION:
Illumination properties vary between ureteroscopes in an enclosed cavity in saline, and differs at center vs 45° and 90° positions within scopes. Peripheral illuminance drop can be as high as - 92%, which is undesirable. This may affect the choice of ureteroscope and light brightness settings used in surgery by urologists.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Lighting
/
Ureteroscopes
/
Equipment Design
/
Kidney
Limits:
Humans
Language:
En
Journal:
World J Urol
Year:
2024
Type:
Article
Affiliation country:
Switzerland