scholarly journals EFFECTS OF LOW FREQUENCY ULTRASOUND COMPARE WITH HIGH FREQUENCY ULTRASOUND IN KNEE OSTEOARTHRITIS

2012 ◽  
Vol 1 (1) ◽  
pp. 9-12
Author(s):  
Syeda Amool Sakeena Rizvi ◽  
Syed Abid Mehdi Kazmi ◽  
Sumaira Imran Farooqi ◽  
Jharna Devi
Keyword(s):  
High Frequency ◽  
Low Frequency ◽  
High Frequency Ultrasound ◽  
Multiple Treatment ◽  
Knee Oa ◽  
Significant Difference ◽  
Low Frequency Ultrasound ◽  
Group A ◽  
Group B ◽  
Frequency Ultrasound

OBJECTIVE To compare the effectiveness of low and high frequency ultrasound (US) technique for treatment of osteoarthritis (OA) of knee joint. It is a pre-post design was used with multiple treatment therapies (A and B). The study was conducted on the 310 patients. The patients were diagnosed knee OA by the orthopedic doctor and recommended to the Physiotherapy department of North and Clifton Campus of Ziauddin Hospital. In this study 310 patients were divided into two groups. Group A of 155 patients received low frequency US treatment of 0.01MHz frequency for 10 min and at the same time Group B of 155 patients received high frequency US treatment of 1MHz for about 3 min. Both the groups had 6 sessions in 3 weeks. There was a mean reduction in the pain and disability with difference of low frequency US and high frequency US pre score and post score treatments of both the groups is 1.2± 0.3 and 4.1± 1.0, there was statistically significant difference between the effects of low frequency US and high frequency US in pain management of knee O.A (P < 0.05). There was difference between the effectiveness of low frequency US

scholarly journals Ultrassom terapêutico para cicatrização de feridas: revisão sistemática

2017 ◽  
Vol 15 (3) ◽  
pp. 518-529
Author(s):  
Raciele Ivandra Guarda Korelo ◽  
Luiz Claudio Fernandes
Keyword(s):  
High Frequency ◽  
Low Frequency ◽  
High Frequency Ultrasound ◽  
Pulsed Ultrasound ◽  
Low Intensity Pulsed Ultrasound ◽  
Low Intensity ◽  
Low Frequency Ultrasound ◽  
Frequency Ultrasound

Introdução: o uso do ultrassom terapêutico (UST) para cicatrização de feridas ainda é discutido pela comunidade científica. Objetivo: determinar se o UST produz desfechos benéficos na cicatrização de feridas e quais tem sido os parâmetros utilizados para proporcionar melhor dose-resposta. Métodos: Foram pesquisadas as bases de dados PubMEd, SciELO e PEDro. Foram selecionados 19 ensaios clínicos, avaliados pelas escalas PEDro e JADAD. Resultados: dos 19 estudos, 8 relacionaram-se à aplicação do NCLFU (Noncontact Low Frequency Ultrasound) com evidência moderada para sua aplicação, 6 à aplicação do HFU (High Frequency Ultrasound) e 1 à aplicação de LIPUS (Low Intensity Pulsed Ultrasound), ambos com baixa evidência. Quanto a relação dose-resposta, não há concordância entre os estudos desta revisão. Conclusões: existe evidência moderada da NCLFU e limitada da HFU como recurso adjuvante para o tratamento de feridas, não sendo possível responder com clareza a melhor relação dose-resposta.

scholarly journals Applicability of High-Frequency Ultrasound to the Early Diagnosis of Diabetic Peripheral Neuropathy

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Xishun Ma ◽  
Tongxia Li ◽  
Lizhen Du ◽  
Gang Liu ◽  
Ting Sun ◽  
...  
Keyword(s):  
Blood Flow ◽  
Peripheral Neuropathy ◽  
Early Diagnosis ◽  
Conduction Velocity ◽  
Diabetic Peripheral Neuropathy ◽  
High Frequency ◽  
High Frequency Ultrasound ◽  
Group A ◽  
Group B ◽  
Frequency Ultrasound

This study investigated the applicability of high-frequency ultrasound (HFU) to the early diagnosis of diabetic peripheral neuropathy (DPN). Patients with type 2 diabetes ( N = 60 ) were divided into diabetic nonperipheral neuropathy and DPN groups (group A and group B, respectively; n = 30 each) based on electroneurophysiologic findings. Additionally, 30 nondiabetic patients were included as the healthy control group (group C). We calculated the cross-sectional area (CSA) of the median nerve (MN) of the right upper limb at 7 different sites (MN1–7) based on measured width ( W ) and thickness ( T ). Ultrasound imaging characteristics of the MN including internal echo, internal structure, boundary, epineurium, and blood flow were recorded. The 90 subjects (51 male and 39 female) had an average age of 56.09 ± 12.66 years. W , T , and CSA of the MN were increased in group A compared to group C (with significant differences at MN1, MN4, and MN7 ( P < 0.05 )) and in group B compared to group C (with significant differences at all 7 levels, especially MN6 and MN7 ( P < 0.05 )). Receiver operating characteristic curve analysis showed that CSA at the MN7 level had the highest diagnostic accuracy for DPN in group B, with a threshold value of 12.42 mm2. Ultrasound examination revealed that the MN had lost the internal sieve mesh structure and showed reduced echo, a partial blood flow signal, and thickened epineurium in patients with DPN; these findings were particularly obvious at MN6 and MN7, corresponding to the carpal tunnel. CSA was positively correlated with motor latency and F wave average latency and negatively correlated with motor conduction velocity, motor amplitude, and sensory conduction velocity in group B. Thus, HFU may be useful for the early diagnosis of DPN, which can improve clinical outcomes.

Minimal Invasive Treatment for Defective Restorations: Five-Year Results Using Sealants

2013 ◽  
Vol 38 (2) ◽  
pp. 125-133 ◽  
Author(s):  
J Martin ◽  
E Fernandez ◽  
J Estay ◽  
VV Gordan ◽  
IA Mjor ◽  
...  
Keyword(s):  
Low Frequency ◽  
Treated Group ◽  
Recall Rate ◽  
Marginal Adaptation ◽  
Invasive Treatment ◽  
Secondary Caries ◽  
Fissure Sealant ◽  
Significant Difference ◽  
Group A ◽  
Group B

SUMMARY Replacement of dental restorations has been the traditional treatment for restorations that are defective. In this five-year randomized clinical trial, restorations with localized marginal defects were treated with sealants. Thirty-two patients (mean age, 26.8 years) with 126 Class I and Class II restorations with defective margins (amalgam n=69 and resin-based composite n=57) were recruited. Treatment was seal with pit and fissure sealant on localized marginal defects (group A: n=43) and was compared with total restoration replacement (group B: n=40) and untreated restorations (group C: n=43) as negative and positive controls. Restorations were assessed by two examiners using the modified US Public Health Service criteria, observing five clinical parameters: marginal adaptation, roughness, marginal stain, teeth sensitivity, and secondary caries at baseline and at five years after treatment. At the five-year recall examination, 23 patients with 90 restorations (71.4% recall rate) were examined. A significant improvement was observed in the marginal adaptation of the restorations in group A compared with group B. None of the treated group showed trends to downgrade in any parameter. Tooth sensitivity and secondary caries showed a low frequency in all groups. No significant difference in marginal adaptation of the restorations was found between amalgam and resin-based composite restorations (p=0.191). This study demonstrated that marginal sealing of restorations is a minimally invasive treatment that may be used instead of the replacement of restorations with localized marginal defects.

scholarly journals Comparison Of Diacerein-Ginger With Diacerein Alone In Treating Knee Osteoarthritis

2019 ◽  
Vol 09 (04) ◽  
pp. 308-311
Author(s):  
Mehtab Munir ◽  
Shahid Mustafa Memon ◽  
Sajid Abbas Jaffri ◽  
Khalid Mustafa Memon
Keyword(s):  
Knee Osteoarthritis ◽  
P Value ◽  
Womac Pain ◽  
Test Results ◽  
Knee Oa ◽  
Significant Difference ◽  
Group A ◽  
Insignificant Difference ◽  
Group B ◽  
Pain At Rest

Objective: To compare clinical efficacy of diacerein-ginger with diacerein alone in treating knee osteoarthritis. Duration and place of study: It was a randomized clinical trial conducted from 21st September 2018 to 31stMarch 2019, in medical OPD of a private hospital in Karachi. Methodology: 60 diagnosed patients of knee osteoarthritis were included in this study. Male and female patients 50 years of age, fulfilling the inclusion criteria and after written informed consent experienced a wash-out period of 72 hours. These patients were systematically randomized into 2 groups each having 30 members. Group A received capsule Diacerein 50mg + capsule Ginger 550 mg twice daily and group B received capsule Diacerein 50mg twice daily, for 12 weeks. Parameters checked at 0, 6 and 12 weeks were: Western Ontario and McMaster Universities Osteoarthritis (WOMAC) index, pain at rest and movement (Visual Analogue Scale). Comparison of the two groups was done by independent t-test. Results: Among 60 patients; 20 (33.33 %) were males and 40 (66.66%) were females. 4 patients in group A and 4 in B, dropped out during the study. Comparison of group A with group B in WOMAC and pain (at rest and movement) scores showed insignificant difference at day 0 before prescription of the drugs. However comparison showed highly significant difference (P-value < 0.001) between the two groups in WOMAC, pain at rest and movement scores at the end of 6th and 12th weeks of intervention. Conclusion: Diacerein-Ginger is clinically more efficacious for management of knee OA than Diacerein alone

scholarly journals Photoacoustic and High-Frequency Ultrasound Imaging of Systemic Sclerosis Patients

2020 ◽  
Author(s):  
Brigit E. Kersten ◽  
Khalid Daoudi ◽  
Cornelia H van den Ende ◽  
Frank H van den Hoogen ◽  
Chris L. de Korte ◽  
...  
Keyword(s):  
Systemic Sclerosis ◽  
Oxygen Saturation ◽  
High Frequency ◽  
Skin Thickness ◽  
Healthy Individuals ◽  
High Frequency Ultrasound ◽  
The Third ◽  
Significant Difference ◽  
Primary Raynaud’S Phenomenon ◽  
Frequency Ultrasound

Abstract Introduction: Systemic sclerosis starts with an early phase characterized by Raynauds phenomenon, puffy fingers/hands, autoantibodies and a scleroderma nailfold­microscopic pattern. Alterations in the nailfoldmicroscopic pattern are not evident in all early SSc patients. Photoacoustics(PA) and high-frequency ultrasound (HFUS) could fulfill this need. The former can measure oxygen saturation while the latter can measure skin thickening. We hypothesize that photoacoustics and high-frequency ultrasound can distinguish (early) SSc patients from individuals with primary Raynaud's phenomenon (PRP) by measuring oxygenation of the fingertip and skin thickening.Methods: We compared measurements of the third finger in (early)SSc patients to healthy and PRP individuals. The level of oxygenation and skin thickness were compared between groups. Nailfoldcapillaroscopy was performed on all subjects.Results: Thirty-one adult subjects participated in this study: twelve patients with SSc, 5 patients with early SSc, 5 volunteers with PR and 9 healthy controls. We found a significant difference in oxygen saturation between (early) SSc patients (80.8% ± 8.1 and 77,9% ± 10.5 ) and individuals with PRP (93.9% ± 1.1). Measurements of skin thickening showed a significant difference in (early) SSc patients compared to individuals with PRP (0.48 ± 0.06 mm and 0.51 ±0.16 mm vs. 0.27 ± 0.01 mm). There was no significant difference between healthy and PRP individuals in oxygenation or skin thickening.Conclusion: Photoacoustic and high-frequency ultrasound can distinguish between (early)SSc, PRP and healthy individuals in both oxygenation and skin thickening.

Ultrasound effects on the assembly of casein micelles in reconstituted skim milk

2013 ◽  
Vol 81 (2) ◽  
pp. 146-155 ◽  
Author(s):  
Zheng Liu ◽  
Pablo Juliano ◽  
Roderick PW Williams ◽  
Julie Niere ◽  
Mary Ann Augustin
Keyword(s):  
High Frequency ◽  
Skim Milk ◽  
Low Frequency ◽  
Casein Micelle ◽  
Casein Micelles ◽  
Specific Energy Input ◽  
Bulk Milk ◽  
Altered Protein ◽  
Low Frequency Ultrasound ◽  
Frequency Ultrasound

Reconstituted skim milks (10 % w/w total solids, pH 6·7–8·0) were ultrasonicated (20, 400 or 1600 kHz at a specific energy input of 286 kJ/kg) at a bulk milk temperature of <30 °C. Application of ultrasound to milk at different pH altered the assembly of the casein micelle in milk, with greater effects at higher pH and lower frequency. Low frequency ultrasound caused greater disruption of casein micelles causing release of protein from the micellar to the serum phase than high frequency. The released protein re-associated to form aggregates of smaller size but with surface charge similar to the casein micelles in the original milk. Ultrasound may be used as a physical intervention to alter the size of the micelles and the partitioning of caseins between the micellar and serum phases in milk. The altered protein equilibria induced by ultrasound treatment may have potential for the development of milk with novel functionality.

A Complete Computational Model of Ultrasound Vibro-Acoustography

2006 ◽  
Author(s):  
Alison E. Malcolm ◽  
Fernando Reitich ◽  
Jiaqi Yang ◽  
Mostafa Fatemi ◽  
James F. Greenleaf
Keyword(s):  
High Resolution ◽  
Optimal Design ◽  
Computational Model ◽  
High Frequency ◽  
Imaging Modality ◽  
Low Frequency ◽  
High Frequency Ultrasound ◽  
Linear Interaction ◽  
Modeling Simulation ◽  
Frequency Ultrasound

Ultrasound vibro-acoustography is a novel medical imaging modality that combines the high resolution of high-frequency ultrasound with the speckle-free images obtained using low-frequency methods. This imaging modality relies on the non-linear interaction of two high frequency beams at slightly different frequencies. We describe the physics of ultrasound vibro-acoustography and outline a strategy for its modeling, simulation, and optimal design.

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