OBJECTIVE To present the frequency resonance hypothesis, a possible mechanical mechanism by which treatment with non-thermal levels of ultrasound stimulates therapeutic effects. The review encompasses a 4-decade history but focuses on recent reports describing the effects of nonthermal therapeutic levels of ultrasound at the cellular and molecular levels. DATA SOURCES A search of MEDLINE from...

In spite of wide spread investigations performed,the biological effects of ultrasound waves,specially on DNA molecule has not been fully understood.since any alteration in DNA molecule can lead to chromosome abnormality,the study of clastogenic effects of ultrasound is important.in this study,the effect of 1MHz frequency continuous waves with the power of 0.5,1 and 1.5 watts on G human lymphocy...

introduction: low-level laser therapy (lllt) is thought to have analgesic and biomodulatory effects. our objective was to assess the pain-relieving effect of lllt and possible changes in joint stiffness and disability of patients with knee osteoarthritis (koa) and compare it to the more commonly used modality; therapeutic ultrasound(us). methods: 37 patients with mild or moderate koa were rando...

Diagnostic or therapeutic thoracentesis in patients with mechanical ventilation is typically performed with ultrasound guidance using a posterolateral approach. Recently, the use of endoscopic ultrasound (EUS) for detection and aspiration of pleural effusions and the feasibility of bedside EUS in critically ill patients has been described. We present a case of EUSguided therapeutic thoracentesi...

Background/introduction Publications in therapeutic ultrasound have been growing exponentially for the past four decades, n = 2 exp ((t-1970)/6), R2 = 0.965, and reached approximately 1440 papers in 2011. Adoption of new International Electrotechnical Commission standards by regulatory agencies such as the United States Food and Drug Administration will enable more rapid approval of devices and...

Endobronchial ultrasound (EBUS) has been introduced as an adjunct to diagnostic bronchoscopy as it allows evaluation of the submucosal and parabronchial structures. Its use in therapeutic bronchoscopy has not been assessed. A large observational study of the value of EBUS in therapeutic bronchoscopy is presented here. From January 1998-January 2001 all patients undergoing therapeutic bronchosco...