title: Simulation of ventilatory-induced stone movement and its effect on stone fracture during extracorporeal shock wave lithotripsy.
abstract: Because ventilation influences renal movement, we investigated the effect of stone motion on the efficiency of extracorporeal shock-wave lithotripsy (ESWL). Comparisons of the rates of fragmentation of an experimental model of renal calculi were made between simulated high-frequency jet ventilation at 100 breaths/min. with four-mm. stone movement as measured from the fluoroscope screen, conventional mechanical ventilation at 10 breaths/min. with 32-mm. stone movement as measured from the fluoroscope screen, and a static control. Fragmentation did not differ significantly between high-frequency jet ventilation and no ventilation (static control), but was significantly greater with high-frequency jet ventilation than with conventional ventilation.
authors.affiliation: Department of Surgery, University of Florida College of Medicine, Gainesville.
authors.forename: J P
authors.initials: JP
authors.lastname: Whelan
authors.forename: N
authors.initials: N
authors.lastname: Gravenstein
authors.forename: J L
authors.initials: JL
authors.lastname: Welch
authors.forename: S
authors.initials: S
authors.lastname: Lampotang
authors.forename: R C
authors.initials: RC
authors.lastname: Newman
authors.forename: B
authors.initials: B
authors.lastname: Finlayson
mesh_terms: D006611:High-Frequency Jet Ventilation; D008096:Lithotripsy; D008961:Models, Structural; D009038:Motion; D055585:Physical Phenomena; D010825:Physics; D012121:Respiration, Artificial