Podcast
Questions and Answers
What is the primary effect of microstreaming on cell membranes?
What is the primary effect of microstreaming on cell membranes?
Which frequency is most suitable for superficial heating up to 3 cm?
Which frequency is most suitable for superficial heating up to 3 cm?
In the context of phonophoresis, what is the main purpose of using ultrasound?
In the context of phonophoresis, what is the main purpose of using ultrasound?
At what duty cycle are non-thermal effects observed when using pulsed ultrasound?
At what duty cycle are non-thermal effects observed when using pulsed ultrasound?
Signup and view all the answers
What is the maximum intensity for 1 MHz ultrasound when targeting deeper tissue heating?
What is the maximum intensity for 1 MHz ultrasound when targeting deeper tissue heating?
Signup and view all the answers
What should be considered regarding the treatment area in relation to the ERA of the transducer?
What should be considered regarding the treatment area in relation to the ERA of the transducer?
Signup and view all the answers
Which of the following is a characteristic of continuous ultrasound?
Which of the following is a characteristic of continuous ultrasound?
Signup and view all the answers
When using indirect ultrasound, how should the transducer head be positioned?
When using indirect ultrasound, how should the transducer head be positioned?
Signup and view all the answers
Study Notes
Microstreaming and Cavitation
- Microstreaming is the flow of currents around gas bubbles, caused by cavitation.
- This agitation affects cell membranes, increasing ion permeability.
- Stable cavitation contributes to increased cell permeability, ion exchange, and tissue repair.
Phonophoresis
- Phonophoresis uses ultrasound to deliver medication transdermally, typically to reduce inflammation.
- Parameters:
- Frequency: Usually 3 MHz (though 1 MHz is also used).
- Duty cycle: 20% pulsed.
- Intensity: 0.5-0.75 W/cm².
- Treatment duration: 5-10 minutes.
Deep Heat via Ultrasound
- Ultrasound converts sound waves to mechanical vibrations, generating heat and non-thermal effects in tissue.
- The ultrasound agent penetrates up to 5 cm.
- Parameter selection is crucial:
- Frequency:
- 3 MHz for superficial heating (1-3 cm). Higher intensity, less heat on scars.
- 1 MHz for deep heating (up to 5 cm). Lower intensity, careful around piriformis.
- Intensity: (ranges vary depending on Frequency and duty cycle):
- 3 MHz (superficial): 0.5-1.0 W/cm²
- 1 MHz (deep): up to 1.5 W/cm²
- Duty Cycle: Impacts thermal vs non-thermal effects.
- Pulsed: Non-thermal, promotes ion exchange, acute conditions, healing.
- Continuous: Thermal, intense healing, chronic conditions, increases blood flow and tissue extensibility, uninterrupted sound waves.
- Thermal vs. Non-Thermal: Thermal parameters:
- 100% Duty cycle (Continuous):
- 1-2 cm: 3 MHz, 1.0 W/cm²
- Up to 5 cm: 1.5-2.0 W/cm²
- Non-Thermal (Pulsed): 20% duty cycle
- 1-2 cm: 0.5-1.0 W/cm²
- Up to 5 cm: 0.5-1.0 W/cm²
- 100% Duty cycle (Continuous):
- Treatment Area and Duration: 2-4 times the size of ERA for 5-10 minutes.
- Direct vs Indirect application. Direct using Gel/lotion/pad, indirect in water with transducer 1-2 cm from skin-increase 50% intensity).
- Frequency:
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz covers essential ultrasound therapy techniques, including microstreaming, phonophoresis, and deep heat application via ultrasound. Understand how these methods facilitate tissue repair and medication delivery while considering critical parameters like frequency and intensity.
