In:
BJU International, Wiley, Vol. 123, No. 1 ( 2019-01), p. 113-117
Abstract:
To evaluate the potential impact of alterations in ‘patient’ position on laser‐induced ureteric stone retropulsion in an in vitro model. Materials and Methods A ceramic (phantom) stone was placed in a water‐filled clear polymer tube and subjected to continuous laser energy until the stone had retropulsed a distance of 10 cm. The trial was stopped after 60 s if the stone had not reached 10 cm. The time and total energy needed to cause 10 cm of retropulsion were recorded at incline angles of 0°, 10°, 20°, and 40°; 10 trials at each angle were completed. The study was then repeated with pure calcium phosphate brushite stones. Results Retropulsion decreased with increasing incline angle of the saline‐filled clear polymer tube. At 0° of incline the phantom stone reached a distance of 10 cm after 7.4 s. At 10°, 20° and 40°, the phantom stone migrated a mean maximum distance of 3.1, 1.2 and 0.7 cm, respectively, and the trial was stopped after 60 s. For the calcium phosphate stone, at 0° and 10° of incline, the stone reached 10 cm after 6.9 and 42.8 s, respectively ( P 〈 0.05). At 20° and 40°, the calcium phosphate stone moved a mean maximum distance of 2.4 and 1 cm, and the trial was stopped after 60 s. Conclusion Alterations in the angle of inclination reduced stone retropulsion during ureteroscopic lithotripsy in an in vitro model to 〈 1 cm. Increasing the incline angle of a patient may effectively preclude retropulsion when performing laser lithotripsy of ureteric stones.
Type of Medium:
Online Resource
ISSN:
1464-4096
,
1464-410X
DOI:
10.1111/bju.2019.123.issue-1
Language:
English
Publisher:
Wiley
Publication Date:
2019
detail.hit.zdb_id:
2019983-1
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