In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 109, No. 5_Supplement ( 2001-05-01), p. 2481-2481
Abstract:
Large, rapid expansion of intraluminal bubbles has recently been demonstrated as a potential mechanism for the rupture of capillaries and small blood vessels in shock wave lithotripsy (SWL). To reduce vascular injury without compromising the fragmentation capability of a lithotripter, we developed a strategy to modify the ellipsoidal reflector of an HM-3 lithotripter so that following each spark discharge a weak compressive pulse is generated to superimpose onto the tensile component of a lithotripter shock wave. This modified waveform was found to significantly suppress bubble expansion; and the propensity of vascular injury, as assessed by the rupture of a cellulose vessel phantom, is reduced by an order of magnitude both at 20 and 24 kV. At 24 kV, stone fragmentation is reduced by about 30% using the modified reflector, which, however, is comparable to that produced by the standard reflector at 20 kV. These results suggest that the modified reflector may be used to produce sufficient stone comminution with much reduced potential for vascular injury in SWL. [Work supported by NIH.]
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
2001
detail.hit.zdb_id:
1461063-2
detail.hit.zdb_id:
219231-7
