Ultrasound Therapy at 3 MHz: An In-Depth Analysis

Ultrasound therapy, as a non-invasive physical therapy, has been widely used in clinical treatment since the early 20th century. Its basic principle is to use sound waves with a frequency higher than 20kHz to produce therapeutic effects on human tissues through mechanical effects, thermal effects, and biophysical and chemical effects. In recent years, with the continuous advancement of technology, 3 MHz frequency ultrasound therapy has become a research hotspot due to its unique advantages, such as high-precision positioning, deep tissue penetration, and low side effects. This study aims to deeply explore the theoretical basis, application effects, and future research directions of 3 MHz ultrasound therapy.

Theoretical basis and conceptual framework

Ultrasound therapy relies on the propagation characteristics of ultrasound in human tissues, including parameters such as sound velocity, acoustic impedance, sound intensity, and sound pressure. When ultrasound acts on human tissues, it will produce mechanical vibrations, micro-flow effects, and cavitation, which will then induce micro-massage, thermal effects, and biophysical and chemical changes in the tissues. These effects help improve local blood circulation, promote the dissipation of inflammation, relieve pain, and promote tissue repair.

Looking back at previous studies, ultrasound therapy has been proven to have therapeutic effects on a variety of diseases, including but not limited to soft tissue injuries, arthritis, neuralgia and fracture healing. However, there is still a lack of research on the specific mechanism of action, optimal therapeutic dose and long-term efficacy of 3 MHz frequency ultrasound therapy, which provides a broad space for exploration in this study.

Research Methods and Design

This study adopted a randomized controlled trial design to evaluate the therapeutic effect of 3 MHz ultrasound therapy on patients with chronic pain. The subjects were 100 patients with chronic pain, who were randomly divided into an experimental group and a control group, with 50 people in each group. The experimental group received 3 MHz ultrasound therapy three times a week, 20 minutes each time, for four weeks; the control group received conventional physical therapy.

The research data came from the patients' pain scores (using the visual analog scale VAS), functional activity level (using the functional activity scale FAS) and quality of life scores (using the SF-36 quality of life scale). Data collection was carried out by combining questionnaires and clinical evaluations to ensure the authenticity and objectivity of the data.

Research Results and Analysis

After four weeks of treatment, the pain scores of the patients in the experimental group were significantly reduced, with an average decrease of 40%; while the pain scores of the patients in the control group only decreased by 15%. In addition, the functional activity level and quality of life scores of the experimental group were significantly improved, which was significantly different from those of the control group.

Further analysis found that the therapeutic effect of 3 MHz ultrasound therapy on patients with chronic pain was closely related to the therapeutic dose. In this study, the best therapeutic effect was achieved with moderate doses of ultrasound therapy (sound intensity of about 1.0-1.5W/cm²). Too high or too low doses may lead to decreased therapeutic effects or increased side effects.

Conclusion and Suggestions

This study shows that 3 MHz ultrasound therapy has a significant therapeutic effect on patients with chronic pain, and can significantly improve the pain level, functional activity level and quality of life of patients. During the treatment, the therapeutic dose should be strictly controlled to avoid decreased therapeutic effects or increased side effects caused by too high or too low doses.

Future studies can further explore the optimal treatment parameters of 3 MHz ultrasound therapy (such as treatment time, treatment frequency, etc.), as well as its therapeutic effects in different types of diseases. In addition, the combined application of ultrasound therapy with other physical therapy methods can also be explored to achieve better therapeutic effects.