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Lin L, Ba Z, Tian H, Qin H, Chen X, Zhou X, Zhao S, Li L, Xue F, Li H, He L, Li X, Du J, Zhou Z, Zeng W. Ultrasound-responsive theranostic platform for the timely monitoring and efficient thrombolysis in thrombi of tPA resistance. Nat Commun 2024; 15:6610. [PMID: 39098904 PMCID: PMC11298549 DOI: 10.1038/s41467-024-50741-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 07/08/2024] [Indexed: 08/06/2024] Open
Abstract
There is no effective and noninvasive solution for thrombolysis because the mechanism by which certain thrombi become tissue plasminogen activator (tPA)-resistant remains obscure. Endovascular thrombectomy is the last option for these tPA-resistant thrombi, thus a new noninvasive strategy is urgently needed. Through an examination of thrombi retrieved from stroke patients, we found that neutrophil extracellular traps (NETs), ε-(γ-glutamyl) lysine isopeptide bonds and fibrin scaffolds jointly comprise the key chain in tPA resistance. A theranostic platform is designed to combine sonodynamic and mechanical thrombolysis under the guidance of ultrasonic imaging. Breakdown of the key chain leads to a recanalization rate of more than 90% in male rat tPA-resistant occlusion model. Vascular reconstruction is observed one month after recanalization, during which there was no thrombosis recurrence. The system also demonstrates noninvasive theranostic capabilities in managing pigs' long thrombi (>8 mm) and in revascularizing thrombosis-susceptible tissue-engineered vascular grafts, indicating its potential for clinical application. Overall, this noninvasive theranostic platform provides a new strategy for treating tPA-resistant thrombi.
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Affiliation(s)
- Lin Lin
- Department of Cell Biology, Third Military Medical University, Chongqing, China
- School of Medicine, Chongqing University, Chongqing, China
- Chongqing Institute of Advanced Pathology, Jinfeng Laboratory, Chongqing, China
| | - Zhaojing Ba
- Department of Cell Biology, Third Military Medical University, Chongqing, China
| | - Hao Tian
- Department of Cell Biology, Third Military Medical University, Chongqing, China
| | - Haoxiang Qin
- Department of Cell Biology, Third Military Medical University, Chongqing, China
| | - Xi Chen
- Department of Neurology, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Xin Zhou
- Department of Cell Biology, Third Military Medical University, Chongqing, China
| | - Shanlan Zhao
- Department of Cell Biology, Third Military Medical University, Chongqing, China
| | - Lang Li
- Department of Cell Biology, Third Military Medical University, Chongqing, China
| | - Fangchao Xue
- Department of Cell Biology, Third Military Medical University, Chongqing, China
| | - Hong Li
- Department of Anesthesiology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - Lang He
- Department of Cell Biology, Third Military Medical University, Chongqing, China
- Chongqing Institute of Advanced Pathology, Jinfeng Laboratory, Chongqing, China
| | - Xiaochen Li
- Department of Cell Biology, Third Military Medical University, Chongqing, China
| | - Jiahui Du
- Department of Cell Biology, Third Military Medical University, Chongqing, China
| | - Zhenhua Zhou
- Department of Neurology, Southwest Hospital, Third Military Medical University, Chongqing, China.
| | - Wen Zeng
- Department of Cell Biology, Third Military Medical University, Chongqing, China.
- Chongqing Institute of Advanced Pathology, Jinfeng Laboratory, Chongqing, China.
- State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Third Military Medical University, Chongqing, China.
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Song H, Chen R, Ren L, Zeng Y, Sun J, Tong S. Low intensity transcranial ultrasound stimulation induces hemodynamic responses through neurovascular coupling. iScience 2024; 27:110269. [PMID: 39055926 PMCID: PMC11269307 DOI: 10.1016/j.isci.2024.110269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Revised: 04/20/2024] [Accepted: 06/12/2024] [Indexed: 07/28/2024] Open
Abstract
Collective studies have demonstrated that transcranial ultrasound stimulation (TUS) can elicit activation in hemodynamics, implying its potential in treating cerebral or peripheral vessel-related malfunction. The theory for hemodynamic response to TUS is neurovascular coupling (NVC) following the ultrasound-induced cellular (de)polarization. However, it was not conclusive due to the co-existence of the pathway of direct ultrasound-vessel interactions. This study thus aims to investigate and provide direct evidence for NVC pathway in a rodent model of TUS by inhibiting neural activity with sodium valproate (VPA), a GABAergic agent. Twenty Sprague-Dawley rats were randomly assigned to VPA and Saline groups. Microelectrode and optical imaging were utilized to record local field potential and relative cerebral blood flow (rCBF) during baseline, before, and after TUS periods. We found the attenuated neural activity was associated with reduced rCBF responses. These results provided direct evidence for the presence of NVC pathway in hemodynamic modulation by TUS.
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Affiliation(s)
- Hang Song
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Ruoyu Chen
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Liyuan Ren
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Yinuo Zeng
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Junfeng Sun
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Shanbao Tong
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
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Morales-Hernandez AG, Martinez-Aguilar V, Chavez-Gonzalez TM, Mendez-Avila JC, Frias-Becerril JV, Morales-Hernandez LA, Cruz-Albarran IA. Short-Term Thermal Effect of Continuous Ultrasound from 3 MHz to 1 and 0.5 W/cm 2 Applied to Gastrocnemius Muscle. Diagnostics (Basel) 2023; 13:2644. [PMID: 37627903 PMCID: PMC10453025 DOI: 10.3390/diagnostics13162644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 08/05/2023] [Indexed: 08/27/2023] Open
Abstract
Continuous ultrasound is recognized for its thermal effect and use in the tissue repair process. However, there is controversy about its dosage and efficacy. This study used infrared thermography, a non-invasive technique, to measure the short-term thermal effect of 3 MHz continuous ultrasound vs. a placebo, referencing the intensity applied. It was a single-blind, randomized clinical trial of 60 healthy volunteers (19-24 years old) divided into three equal groups. Group 1:1 W/cm2 for 5 min; Group 2: 0.5 W/cm2 for 10 min; and Group 3: the placebo for 5 min. The temperature was recorded through five thermographic images per patient: pre- and post-application, 5, 10, and 15 min later. After statistical analysis, a more significant decrease in temperature (p<0.05 ) was observed in the placebo group compared with the remaining groups after the application of continuous ultrasound. Group 1 was the one that generated the highest significant thermal effect (p<0.001), with an increase of 3.05 °C at 15 min, compared with the other two groups. It is concluded that to generate a thermal effect in the muscle, intensities of ≥1 W/cm2 are required, since the dosage maintained a temperature increase for more than 5 min.
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Affiliation(s)
- Arely G. Morales-Hernandez
- Faculty of Nursing, Autonomous University of Queretaro, Queretaro 76010, Mexico
- Education, Movement and Health, Faculty of Nursing, Autonomous University of Queretaro, Queretaro 76010, Mexico
| | - Violeta Martinez-Aguilar
- Faculty of Nursing, Autonomous University of Queretaro, Campus Corregidora, Queretaro 76912, Mexico
| | | | - Julio C. Mendez-Avila
- Faculty of Nursing, Autonomous University of Queretaro, Queretaro 76010, Mexico
- Education, Movement and Health, Faculty of Nursing, Autonomous University of Queretaro, Queretaro 76010, Mexico
| | | | - Luis A. Morales-Hernandez
- Laboratory of Artificial Vision and Thermography/Mechatronics, Faculty of Engineering, Autonomous University of Queretaro, Campus San Juan del Rio, San Juan del Río 76807, Mexico
| | - Irving A. Cruz-Albarran
- Faculty of Nursing, Autonomous University of Queretaro, Queretaro 76010, Mexico
- Laboratory of Artificial Vision and Thermography/Mechatronics, Faculty of Engineering, Autonomous University of Queretaro, Campus San Juan del Rio, San Juan del Río 76807, Mexico
- Artificial Intelligence Systems Applied to Biomedical and Mechanical Models, Faculty of Engineering, Autonomus University of Queretaro, Campus San Juan del Rio, San Juan del Rio 76807, Mexico
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Signori LU, Rubin Neto LJ, Jaenisch RB, Puntel GO, Nunes GS, Paulitsch FS, Hauck M, Silva AMVD. Effects of therapeutic ultrasound on the endothelial function of patients with type 2 diabetes mellitus. Braz J Med Biol Res 2023; 56:e12576. [PMID: 37377306 DOI: 10.1590/1414-431x2023e12576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 05/01/2023] [Indexed: 06/29/2023] Open
Abstract
Type 2 diabetes mellitus (T2DM) is characterized by endothelial dysfunction that causes micro- and macrovascular complications. Low intensity therapeutic ultrasound (LITUS) may improve endothelial function, but its effects have not been investigated in these patients. The aim of our study was to compare the effects of pulsed (PUT) and continuous (CUT) waveforms of LITUS on the endothelium-dependent vasodilation of T2DM patients. The present randomized crossover trial had a sample of twenty-three patients (7 men) diagnosed with T2DM, 55.6 (±9.1) years old, with a body mass index of 28.6 (±3.3) kg/m2. All patients were randomized and submitted to different waveforms (Placebo, CUT, and PUT) of LITUS and the arterial endothelial function was evaluated. The LITUS of 1 MHz was applied in pulsed (PUT: 20% duty cycle, 0.08 W/cm2 SATA), continuous (CUT: 0.4 W/cm2 SPTA), and Placebo (equipment off) types of waves during 5 min on the brachial artery. Endothelial function was evaluated using the flow-mediated dilation (FMD) technique. PUT (mean difference 2.08%, 95% confidence interval 0.65 to 3.51) and CUT (mean difference 2.32%, 95% confidence interval 0.89 to 3.74) increased the %FMD compared to Placebo. In the effect size analysis, PUT (d=0.65) and CUT (d=0.65) waveforms presented moderate effects in the %FMD compared to Placebo. The vasodilator effect was similar in the different types of waves. Pulsed and continuous waveforms of LITUS of 1 MHz improved the arterial endothelial function in T2DM patients.
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Affiliation(s)
- L U Signori
- Programa de Pós-Graduação em Ciências do Movimento e Reabilitação, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
| | - L J Rubin Neto
- Programa de Pós-Graduação em Ciências do Movimento e Reabilitação, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
| | - R B Jaenisch
- Programa de Pós-Graduação em Ciências do Movimento e Reabilitação, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
| | - G O Puntel
- Programa de Pós-Graduação em Ciências do Movimento e Reabilitação, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
| | - G S Nunes
- Programa de Pós-Graduação em Ciências do Movimento e Reabilitação, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
| | - F S Paulitsch
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal do Rio Grande, Rio Grande, RS, Brasil
| | - M Hauck
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal do Rio Grande, Rio Grande, RS, Brasil
| | - A M V da Silva
- Programa de Pós-Graduação em Ciências do Movimento e Reabilitação, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
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Waters M, Miljkovic B, Rascon J, Gomez M, Gurovich AN. Effects of 1 MHz Therapeutic Ultrasound on Limb Blood Flow and Microvascular Reactivity: A Randomized Pilot Trial. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182111444. [PMID: 34769960 PMCID: PMC8583538 DOI: 10.3390/ijerph182111444] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 10/22/2021] [Accepted: 10/27/2021] [Indexed: 11/16/2022]
Abstract
A randomized, double-blind, placebo-controlled, cross-over study where continuous therapeutic ultrasound (CUS; at 0.4 W/cm2), pulsed therapeutic ultrasound (PUS; at 20% duty cycle, 0.08 W/cm2), both at 1 MHz, and placebo (equipment on, no energy provided) were randomized and applied over the forearm of the non-dominant arm for 5 min in 10 young, healthy individuals. Absolute and peak forearm blood flow (FBF) were measured via Venous Occlusion Plethysmography. FBF was measured before, halfway, and after (immediately and 5 min after) the therapeutic ultrasound (TUS) intervention. Post-ischemic peak FBF was measured 10 min before and 10 min after the TUS intervention. A two-way repeated measures ANOVA (group × time) was selected to assess differences in FBF before, during, and after TUS treatment, and for peak FBF before and after TUS treatment. FBF increased 5 min after TUS in CUS compared to placebo (2.96 ± 1.04 vs. 2.09 ± 0.63 mL/min/100 mL of tissue, p < 0.05). PUS resulted in the greatest increase in Peak FBF at 10 min after US (Δ = 3.96 ± 2.02 mL/min/100 mL of tissue, p = 0.06). CUS at 1 MHz was an effective treatment modality for increasing FBF up to 5 min after intervention, but PUS resulted in the greatest increase in peak FBF at 10 min after intervention.
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Affiliation(s)
- Megan Waters
- Doctor of Physical Therapy Program, College of Health Sciences, The University of Texas at El Paso, El Paso, TX 79968, USA; (M.W.); (B.M.); (J.R.)
| | - Branko Miljkovic
- Doctor of Physical Therapy Program, College of Health Sciences, The University of Texas at El Paso, El Paso, TX 79968, USA; (M.W.); (B.M.); (J.R.)
| | - Jozelyn Rascon
- Doctor of Physical Therapy Program, College of Health Sciences, The University of Texas at El Paso, El Paso, TX 79968, USA; (M.W.); (B.M.); (J.R.)
- Clinical Applied Physiology Laboratory, College of Health Sciences, The University of Texas at El Paso, El Paso, TX 79902, USA;
| | - Manuel Gomez
- Clinical Applied Physiology Laboratory, College of Health Sciences, The University of Texas at El Paso, El Paso, TX 79902, USA;
| | - Alvaro N. Gurovich
- Doctor of Physical Therapy Program, College of Health Sciences, The University of Texas at El Paso, El Paso, TX 79968, USA; (M.W.); (B.M.); (J.R.)
- Clinical Applied Physiology Laboratory, College of Health Sciences, The University of Texas at El Paso, El Paso, TX 79902, USA;
- Correspondence: ; Tel.: +1-915-747-7248; Fax: +1-915-747-8211
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Pal UM, Nayak A, Medisetti T, Gogoi G, Shekhar H, Prasad MSN, Vaidya JS, Pandya HJ. Hybrid Spectral-IRDx: Near-IR and Ultrasound Attenuation System for Differentiating Breast Cancer From Adjacent Normal Tissue. IEEE Trans Biomed Eng 2021; 68:3554-3563. [PMID: 33945469 DOI: 10.1109/tbme.2021.3077582] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE While performing surgical excision for breast cancer (lumpectomy), it is important to ensure a clear margin of normal tissue around the cancer to achieve complete resection. The current standard is histopathology; however, it is time-consuming and labour-intensive requiring skilled personnel. METHOD We describe a Hybrid Spectral-IRDx - a combination of the previously reported Spectral-IRDx tool with multimodal ultrasound and NIR spectroscopy techniques. We show how this portable, cost-effective, minimal-contact tool could provide rapid diagnosis of cancer using formalin-fixed (FF) and deparaffinized (DP) breast biopsy tissues. RESULTS Using this new tool, measurements were performed on cancerous/fibroadenoma and its adjacent normal tissues from the same patients (N = 14). The acoustic attenuation coefficient (α) and reduced scattering coefficient (µ's) (at 850, 940, and 1060 nm) for the cancerous/fibroadenoma tissues were reported to be higher compared to adjacent normal tissues, a basis of delineation. Comparing FF cancerous and adjacent normal tissue, the difference in µ's at 850 nm and 940 nm were statistically significant (p = 3.17e-2 and 7.94e-3 respectively). The difference in α between the cancerous and adjacent normal tissues for DP and FF tissues were also statistically significant (p = 2.85e-2 and 7.94e-3 respectively). Combining multimodal parameters α and µ's (at 940 nm) show highest statistical significance (p = 6.72e-4) between FF cancerous/fibroadenoma and adjacent normal tissues. CONCLUSION We show that Hybrid Spectral-IRDx can accurately delineate between cancerous and adjacent normal breast biopsy tissue. SIGNIFICANCE The results obtained establish the proof-of-principle and large-scale testing of this multimodal breast cancer diagnostic platform for core biopsy diagnosis.
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Xu M, Wang L, Wu S, Dong Y, Chen X, Wang S, Li X, Zou C. Review on experimental study and clinical application of low-intensity pulsed ultrasound in inflammation. Quant Imaging Med Surg 2021; 11:443-462. [PMID: 33392043 DOI: 10.21037/qims-20-680] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Low-intensity pulsed ultrasound (LIPUS), as physical therapy, is widely used in both research and clinical settings. It induces multiple bioeffects, such as alleviating pain, promoting tissue repair, and shortening disease duration. LIPUS can also mediate inflammation. This paper reviews the application of LIPUS in inflammation and discusses the underlying mechanism. In basic experiments, LIPUS can regulate inflammatory responses at the cellular level by affecting some signaling pathways. In a clinical trial, LIPUS has been shown to alleviate inflammatory responses efficiently. As a cheap, safe, and convenient physical method, LIPUS is promising as anti-inflammatory therapy.
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Affiliation(s)
- Maosheng Xu
- Department of Ultrasonography, The Second Affiliated Hospital, and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Liang Wang
- Department of Ultrasonography, The Second Affiliated Hospital, and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Senmin Wu
- Department of Ultrasonography, The Second Affiliated Hospital, and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Yanyan Dong
- Department of Ultrasonography, The Second Affiliated Hospital, and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xiu Chen
- Department of Ultrasonography, The Second Affiliated Hospital, and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Shijia Wang
- Department of Ultrasonography, The Second Affiliated Hospital, and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xiuyun Li
- Department of Ultrasonography, The Second Affiliated Hospital, and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Chunpeng Zou
- Department of Ultrasonography, The Second Affiliated Hospital, and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
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Petterson S, Plancher K, Klyve D, Draper D, Ortiz R. Low-Intensity Continuous Ultrasound for the Symptomatic Treatment of Upper Shoulder and Neck Pain: A Randomized, Double-Blind Placebo-Controlled Clinical Trial. J Pain Res 2020; 13:1277-1287. [PMID: 32606899 PMCID: PMC7287226 DOI: 10.2147/jpr.s247463] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 05/05/2020] [Indexed: 12/27/2022] Open
Abstract
Purpose Low-intensity continuous ultrasound (LICUS) is an emerging high-dosimetry ultrasound-based therapy for accelerated tissue healing and the treatment of myofascial pain. In this study, LICUS treatment is clinically evaluated for chronic upper neck and shoulder pain in a randomized, multi-site, double-blind, placebo-controlled study. Patients and Methods CONSORT guidelines were followed in conducting and reporting the clinical trial. Thirty-three participants with upper trapezius myofascial pain were randomized for treatment with active (n=25) or placebo (n=8) devices. Investigators and subjects were blinded to treatment groups. Participants self-reported pain daily, rating from 0–10 on the numeric rating scale. If pain rating was more significant than or equal to 3, the LICUS (3MHz, 0.132W/cm2, 1.3W, 4 hours) was self-applied for total energy dosimetry of 18,720 Joules per treatment. During the 4-week study, daily pain rating was recorded. If LICUS treatment was delivered, pain before, during, and after treatment were recorded as well as the global rate of change (GROC). Independent t-tests were used to assess change from baseline and differences between treatment groups. ClinicalTrials.gov: NCT02135094. Results There was a 100% completion rate for participants enrolled in the study and no significant differences between the groups regarding demographic variables or baseline outcome measures. Participants treated with active therapy observed a significant mean pain reduction from baseline of 2.61 points for active (p<0.001), compared to 1.58 points decrease from baseline for placebo (p=0.087), resulting in a 1.03 points significant decrease in the active group over placebo (p=0.003). The total GROC was significantly higher in the active group at 2.84 points compared to the placebo group at 0.46 points (p<0.001). Conclusion Low-intensity continuous ultrasound treatment significantly reduced pain in patients with upper trapezius myofascial pain of the neck and shoulder. LICUS treatment showed a clinically meaningful improvement in the GROC scores for patients. The results from this clinical trial indicate that the LICUS treatment of 18,720 Joules can effectively be used to treat clinical pain related to upper trapezius myofascial pain. Further research could investigate varying dosimetry to improve efficacy and/or reduce the dose.
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Affiliation(s)
| | - Kevin Plancher
- Plancher Orthopaedics & Sports Medicine, New York, NY 10128, USA
| | - Dominic Klyve
- Department of Mathematics, Central Washington University, Ellensburg, WI, USA
| | - David Draper
- Department of Exercise Sciences, Brigham Young University, Provo, UT, USA
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Hauck M, da Silva Paulitsch F, Cruz JM, Martins CN, Oliveira MR, Puntel GO, Vargas da Silva AM, Signori LU. Intensity-dependent effect of pulsed and continuous therapeutic ultrasound on endothelial function: a randomised crossover clinical trial. INTERNATIONAL JOURNAL OF THERAPY AND REHABILITATION 2019. [DOI: 10.12968/ijtr.2018.0049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Background/Aims The aim of this study was to evaluate the effects of different intensities and waveforms of therapeutic ultrasound on endothelial function in typically healthy participants. Methods A total of 15 participants were evaluated over 2 consecutive days. Different intensities of continuous and pulsed (20% duty cycle) 1-MHz ultrasound were applied to the brachial artery for 5 minutes each. Endothelial function was measured using flow-mediated dilation technique before and immediately after ultrasound was applied. Results Compared to baseline values, endothelium-dependent vasodilation increased with both continuous (2.8%) and pulsed (1.6%) ultrasound at an intensity of 0.4 W/cm2SPTA. At 1.2 W/cm2SPTA, endothelium-dependent vasodilation was 4.1% above baseline for pulsed and 5.3% above baseline for continuous waveforms. There was no additional increase in vasodilation at intensities above 1.2 W/cm2SPTA. The percentage of endothelium-dependent vasodilation was similar for the all of the different waveforms studied. Conclusions Both continuous and pulsed ultrasound waveforms promote endothelium-dependent vasodilation. There was a dose-dependent increase in vasodilation at intensities from 0.4 W/cm2SPTA to 1.2 W/cm2SPTA. Pulsed is more efficient than continuous ultrasound because it produces the same effect on endothelium-dependent vasodilation while employing 20% of the energy applied with continuous ultrasound.
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Affiliation(s)
- Melina Hauck
- Faculty of Medicine, Graduate Programme in Health Sciences, Federal University of Rio Grande, Rio Grande, Brazil
| | - Felipe da Silva Paulitsch
- Faculty of Medicine, Graduate Programme in Health Sciences, Federal University of Rio Grande, Rio Grande, Brazil
| | - Jeferson Mendez Cruz
- Faculty of Medicine, Graduate Programme in Health Sciences, Federal University of Rio Grande, Rio Grande, Brazil
| | - Cassio Noronha Martins
- Faculty of Medicine, Graduate Programme in Health Sciences, Federal University of Rio Grande, Rio Grande, Brazil
| | - Murilo Rezende Oliveira
- Physiotherapy and Rehabilitation Department, Postgraduate Programme in Functional Rehabilitation, Federal University of Santa Maria, Santa Maria, Brazil
| | - Gustavo Orione Puntel
- Physiotherapy and Rehabilitation Department, Postgraduate Programme in Functional Rehabilitation, Federal University of Santa Maria, Santa Maria, Brazil
| | - Antônio Marcos Vargas da Silva
- Physiotherapy and Rehabilitation Department, Postgraduate Programme in Functional Rehabilitation, Federal University of Santa Maria, Santa Maria, Brazil
| | - Luis Ulisses Signori
- Physiotherapy and Rehabilitation Department, Postgraduate Programme in Functional Rehabilitation, Federal University of Santa Maria, Santa Maria, Brazil
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Analysis of Cell Viability and Gene Expression After Continuous Ultrasound Therapy in L929 Fibroblast Cells. Am J Phys Med Rehabil 2019; 98:369-372. [DOI: 10.1097/phm.0000000000001103] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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