Publications by authors named "Jonathan Von Der Haar"
Background: In the past couple of years, there has been an outbreak of synthetic cannabinoid (SC) use in major cities in the United States. Patients can present with various symptoms affecting the central nervous and cardiovascular systems. The effects of endocannabinoid on contractility and Ca(2+) signaling have been shown through both cannabinoid receptors and a direct effect on ion channels.
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- Rigid intracorporeal lithotrites, like the Lithoclast Ultra Vario, are crucial for removing large kidney stones during percutaneous nephrolithotomy, featuring both an ultrasound probe and a pneumatic-ballistic probe.
- Testing revealed that extending the ballistic probe improves penetration speed for fixed stones, while retracting it enhances comminution speed for mobile stones.
- Overall, optimal operation involves extending the probe for stationary stones and retracting it for movable stones, balancing efficiency and effectiveness in different scenarios.
Previous in vitro studies of acoustic coupling in shock wave lithotripsy (SWL) have shown that air pockets trapped at the surface of the treatment head significantly reduce transmission of shock wave (SW) energy to the focal zone of the lithotripter, reducing the effectiveness of stone breakage. Since there are no reliable means to monitor the quality of coupling during SWL, we looked for a practical protocol to improve how coupling is achieved. In vitro studies were performed using a Dornier DoLi-50 lithotripter.
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