Table 1.
Demographics, Stone Characteristics, and Shockwave Lithotripsy Session Details
| N=10 patients, 13 stones | |
|---|---|
| Mean age±SD (years) | 50±15 |
| (range) | (26–78 years) |
| Male (%) | 60% |
| Female (%) | 40% |
| Mean body mass index (kg/m2)±SD | 29±6 |
| (range) | (20–39) |
| Mean stone size±SD | 10.5±3.7 mm |
| (range) | 5–18 mm |
| Stone location (%) | |
| Renal pelvis | 6 (46%) |
| Upper pole | 1 (8%) |
| Lower pole | 5 (38%) |
| Ureter | 1 (8%) |
| SWL machine | |
| Healthtronics Lithotron | 5 (50%) |
| Focal area (mm2) | 50 mm2 |
| Dornier Compact Delta II | 5 (50%) |
| Focal area (mm2) | 47 mm2 |
| SWL treatment | |
| Mean shocks±SD | 2675±303 |
| (range) | (2100–3000) |
| Frequency | 1–2 Hz |
| Mean duration of delivery of shockwaves±SD | 35±6 minutes |
| Energy settings: | |
| Healthtronics Lithitron (kVp) | 14–26 |
| Dornier Compact Delta II | 1–5 |
| Mean respiratory rate±SD | 13±4 breaths/minute |
| (range) | (8–19/minute) |
| Mean respiratory stone motion±SD | 1.5±0.3 cm |
| US imaging | |
| Average duration of US video observation | 7.1 min |
| Proportion of SWL treatment evaluated by US monitoring | 20.4% |
| Accuracy of SWL treatment (%) | |
| Subject 1 | 38% |
| Subject 2 | 46% |
| Subject 3 | 40% |
| Subject 4 | 56% |
| Subject 5 | 65% |
| Subject 6 | 71% |
| Subject 7 | 58% |
| Subject 8 | 72% |
| Subject 9 | 65% |
| Subject 10 | 85% |
| Overall±SD | 60±15% |
SD=standard deviation; SWL=shockwave lithotripsy; US=ultrasound.