Measurements using a fiber-optic probe hydrophone, high-speed camera, and B-mode ultrasound showed attenuation of the trailing negative-pressure phase of a lithotripter shock pulse under conditions that favor generation of cavitation bubbles, such as in water with a high content of dissolved gas or at high pulse repetition rate where more cavitation nuclei persisted between pulses. This cavitation-mediated attenuation of the acoustic pulse was also observed to increase with increasing amplitude of source discharge potential, such that the negative-pressure phase of the pulse can remain fixed in amplitude even with increasing source discharge potential.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2743497 | PMC |
| http://dx.doi.org/10.1121/1.2127115 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Enteral Feeding in Patients With Open Abdomen and Negative Pressure Therapy: A Propensity Score Analysis.
J Abdom Wall Surg
December 2024
Anesthesiology and Critical Care Department, Pellegrin University Hospital, Bordeaux, France.
Introduction: In critically ill surgical patients treated with open abdomen and negative pressure therapy (OA/NPT), the association between nutritional support and clinical outcome is still controversial. The main objective of this study was to assess the effect of enteral nutritional support during the acute phase (i.e.
View Article and Find Full Text PDFExternal negative pressure transiently reduces intravenous pressure and augments the arteriovenous pressure gradient in the affected limb segment.
PLoS One
December 2024
Faculty of Medicine, University of Oslo, Oslo, Norway.
Recently intermittent negative pressure has emerged as a potential treatment in vascular disease and has similarities with established experimental interventions such as lower body negative pressure. The direct, local influences of either method upon intravascular pressure still require some clarification however, particularly in the immediate moments following onset. We investigated the acute intravascular pressure responses to intermittent cycles of negative pressure in the supine and sitting postures.
View Article and Find Full Text PDF[A case of successful treatment of a patient with necrotizing infection of the soft tissues of the upper limb, complicated by septic shock, NPWT system with instillation].
Khirurgiia (Mosk)
November 2024
Saint Petersburg I.I. Dzhanelidze Research Institute of Emergency Medicine, Saint Petersburg, Russia.
Article Synopsis
- * The clinical case highlights successful treatment of a patient with significant pre-existing health issues, using local negative pressure therapy (NPWT) early in the infection process.
- * After initial treatment, the NPWT system continued to be used to manage the wound and prepare it for closure effectively.
Wavelet Phase Coherence Analysis of Oxyhemoglobin and DeoxyHemoglobin Oscillations to Investigate the Relationship Between Cups of Cupping Therapy.
J Biophotonics
November 2024
Department of Health and Kinesiology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA.
Research has not demonstrated whether multiple cups of negative pressure cupping therapy would induce interactions of hemodynamic responses between different areas. A multichannel near-infrared spectroscopy (NIRS) was used to assess oxyhemoglobin and deoxyhemoglobin oscillations in response to cupping therapy. Wavelet transform and wavelet phase (WPC) coherence were used to quantify NIRS signals.
View Article and Find Full Text PDFContinuously tunable negative pressure for engineering high-symmetry nanocrystalline phases.
Proc Natl Acad Sci U S A
November 2024
Department of Chemical and Biological Engineering, Drexel University, Philadelphia, PA 19104.
In this work, the phenomenon of strain induced by a mismatch in thermal expansion coefficients between a thin film and its substrate is harnessed in a new context, replacing the canonical planar support with a three-dimensional (3-D), nanoconfining scaffold in which we embed a material of interest. In this manner, we demonstrate a general approach to exert a continuously tunable, triaxial, tensile strain, defying the Poisson ratio of the embedded material and achieving the exotic condition of "negative pressure." This approach is hypothetically generalizable to materials of low modulus and high thermal expansion coefficient, and we use it here to achieve negative pressure in perovskite-phase CsPbI embedded within the cylindrical pores of anodic aluminum oxide membranes.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!