Newly designed solid coupling medium for reducing trapped air pockets during extracorporeal shock wave lithotripsy_ a phantom study
| Autor: | Wen-Chin Liou, Wen-Jeng Wu, Wei-Chuan Chen, Ching-Chia Li, Yusen Eason Lin, Chien-Sheng Wang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Shock wave
Urology Optical coupling Imaging phantom Coupling Lithotripsy Medicine Coupling (piping) Humans business.industry Phantoms Imaging Research Air Acoustic energy General Medicine Extracorporeal shock wave Trapped air Diseases of the genitourinary system. Urology Extracorporeal shock wave lithotripter Air pockets Reproductive Medicine RC870-923 business Disintegration Rate Gels Biomedical engineering |
| Zdroj: | BMC Urology BMC Urology, Vol 21, Iss 1, Pp 1-7 (2021) |
| ISSN: | 1471-2490 |
| Popis: | Introduction Air pockets between the lithotripter head and body surface are almost inevitably generated when applying a handful of gel onto the contact portion of the treatment head and that on the patient’s skin during coupling procedure. These air pockets can compromise the transmission of acoustic energy of shock wave and may significantly affect efficacy of stone disintegration. Comparing to conventional gel, this study aims to investigate efficacy of stone disintegration by using a proprietary isolation-coupling pad (“icPad”) as the coupling medium to reduce trapped air pockets during ESWL procedure. Method In this phantom study, Dornier lithotripter (Delta-2 RC, Dornier MedTech Europe GmbH Co., Germany) was used with a proprietary gel pads (icPad, Diameter = 150 mm, Thickness = 4 mm and 8 mm). The lithotripter was equipped with inline camera to observe the trapped air pockets between the contact surface of the lithotripter head. A testing and measuring device were used to observe experimental stone disintegration using icPad and semi-liquid gel. The conventional semi-liquid gel was used as control for result comparison. Results The stone disintegration rate of icPad 4 mm and 8 mm after 200 shocks of energy at level 2 were significantly higher than that of the semi-liquid gel (disintegration rate 92.3%, 85.0% vs. 45.5%, respectively, p Conclusion The advantages of icPad includes: (1) reduced the numbers of shock wave and increased stone disintegration rate due to icPad’s superior efficacy; (2) significantly reduce trapped air pockets in ESWL coupling. Due to the study limitation, more data are needed to confirm our observations before human trials. |
| Databáze: | OpenAIRE |
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