Intramuscular Heating Rates of a Chattanooga Intelect XT Therapeutic Ultrasound
| Status: | Not yet recruiting |
|---|---|
| Healthy: | No |
| Age Range: | 18 - 35 |
| Updated: | 1/27/2019 |
| Start Date: | January 2019 |
| End Date: | May 2019 |
| Contact: | Kara N Gange, PhD, ATC |
| Email: | kara.gange@ndsu.edu |
| Phone: | 701-231-5777 |
Intramuscular Heating Rates of a Chattanooga Intelect XT Therapeutic Ultrasound With 3 MHz, 1.0 W/cm2 at Three Depths up to 2.5 cm
The purpose of this study is to determine the rate of tissue temperature increase in the
triceps surae during an ultrasound treatment using the Chattanooga Intelect Legend XT. The
following parameters will be used: 3 MHz frequency, 1.0 W/cm2 intensity, 15 minute treatment
time. Thermocouples will be inserted at 1.0, 1.75, and 2.5 cm depths to determine the heating
rates. Most modality textbook recommendations for therapeutic ultrasound are based on studies
performed with the Omnisound ultrasound machine. Previous research has shown variations in
power output across manufacturers, producing differences in tissue temperature increases. No
information has been published regarding the heating rates of the Chattanooga Intelect Legend
XT machine for ultrasound treatments. By determining the heating rates for this machine,
clinicians will be better able to utilize the Chattanooga Intelect Legend XT to help reach
therapeutic goals.
triceps surae during an ultrasound treatment using the Chattanooga Intelect Legend XT. The
following parameters will be used: 3 MHz frequency, 1.0 W/cm2 intensity, 15 minute treatment
time. Thermocouples will be inserted at 1.0, 1.75, and 2.5 cm depths to determine the heating
rates. Most modality textbook recommendations for therapeutic ultrasound are based on studies
performed with the Omnisound ultrasound machine. Previous research has shown variations in
power output across manufacturers, producing differences in tissue temperature increases. No
information has been published regarding the heating rates of the Chattanooga Intelect Legend
XT machine for ultrasound treatments. By determining the heating rates for this machine,
clinicians will be better able to utilize the Chattanooga Intelect Legend XT to help reach
therapeutic goals.
Individual subjects will report to the research lab. They will be instructed to wear
appropriate shorts or pants that can be rolled up to expose the gastrocnemius (calf) muscle.
The subject will lay prone on the treatment table with the foot and lower leg off of the
treatment table in a relaxed, comfortable position. The following procedures will be
completed using universal precautions:
1. The investigator will prep the treatment area by having the subject flex the calf to
determine the proper location for the ultrasound treatment in the middle of the medial
gastrocnemius muscle belly at its largest girth.
1. A carpenter's square with markings along the vertical arm at the three experimental
depths (1.0, 1.75, 2.5 cm) will be used.
2. The horizontal arm of the carpenter's square will be covered in tape. The
carpenter's square is then placed just proximal to the treatment mark while the
level on the horizontal arm is used to maintain a level measure.
3. Marks will be made on the muscle belly parallel to the marks on the vertical axis
at 1.0, 1.75 and 2.5 cm depths.
4. A mark is also made on the horizontal arm tape in line with the treatment mark on
the medial gastrocnemius.
2. The Terason uSmart 3300 diagnostic ultrasound unit will be used to measure the adipose
thickness over the treatment area and look for abnormalities in the treatment and
thermocouple insertion areas. Aquasonic® 100 ultrasound gel will be placed on the 15L4
transducer. The transducer with gel will be placed over the mark of the treatment area.
Once the transducer is in place, the screen will be frozen and the skin and adipose
thickness will be measured using the caliper tool.
3. The thermocouples will be removed from the MetriCide after sterilizing for a minimum of
12 hours prior to insertion.
1. The distal aspect of the thermocouple will be wiped dry with sterile gauze.
2. A mark with a sharpie will be made on each thermocouple just past the length marked
on the horizontal arm of the carpenter's square. This allows the tip of each
thermocouple to be directly below the treatment site. A second mark will be made at
5 cm to make sure the thermocouple does not go too deep into the tissue.
3. The distal end of the thermocouple will be wiped clean again using a 70% isopropyl
alcohol wipe up to the marks and then the thermocouple will be wrapped in sterile
gauze until it is inserted.
4. The insertion areas will be shaved to remove any body hair (if necessary) and cleaned
using Betadine.
a. Once the Betadine dries, 70% isopropyl alcohol will be wiped over the insertion area
and given time to dry.
5. The subject will be instructed to take two deep breaths, while the researcher lightly
grasps the gastrocnemius to confirm muscle relaxation.
1. During the second exhalation, the 1.16 in needle catheter will be placed into the
subject's calf at the 1.0 cm depth insertion mark using the level to guide the
needle in. The needle will be removed leaving the catheter in the tissue.
2. The thermocouple will be threaded through the catheter to the appropriate depth
marked on the thermocouple and the catheter will be removed.
3. The thermocouple will be secured using medical tape to keep it from moving.
4. This procedure will be performed 3 times, with one thermocouple placed at each
respective depth: 1.0 cm, 1.75 cm, and 2.5 cm.
6. Each thermocouple will be attached to the Iso Thermex electronic thermometer (Columbus
Instruments, Columbus, OH), which will measure and record intramuscular temperatures
from the tips of the thermocouples.
7. An ultrasound treatment template will be applied at the treatment site and secured with
tape to maintain consistent treatment size.
a. This template will be twice the size of the transducer's Effective Radiating Area
(ERA).
8. A metronome will be utilized to consistently move the transducer at a rate of 4 cm/s .
9. The ultrasound treatment will begin once the intramuscular temperature has remained the
same for a minute.
10. Each subject will receive one ultrasound treatment at the following parameters: 3 MHz
frequency, 1.0 W/cm2 intensity, and 100% duty cycle using the Chattanooga Intelect®
Legend XT.
a. Termination of treatment will result when any of the following occur: i. A 15-minute
treatment time is obtained. ii. A 4°C temperature increase occurs at all three depths as
this has been shown as the necessary temperature change to increase tissue
extensibility.
iii. A 45°C temperature is reached at any depth, due to concern of tissue damage at high
temperatures.
iv. The subject experiences any pain or discomfort during the treatment.
11. Following the treatment, the ultrasound gel will be wiped from the leg, the template and
thermocouples will be removed, and the insertion sites will be cleaned with 70%
isopropyl alcohol wipes and covered with a band aid.
12. The subject will then be instructed on the possibility of minor soreness for the next
day or two and instructed on an icing schedule to decrease discomfort.
appropriate shorts or pants that can be rolled up to expose the gastrocnemius (calf) muscle.
The subject will lay prone on the treatment table with the foot and lower leg off of the
treatment table in a relaxed, comfortable position. The following procedures will be
completed using universal precautions:
1. The investigator will prep the treatment area by having the subject flex the calf to
determine the proper location for the ultrasound treatment in the middle of the medial
gastrocnemius muscle belly at its largest girth.
1. A carpenter's square with markings along the vertical arm at the three experimental
depths (1.0, 1.75, 2.5 cm) will be used.
2. The horizontal arm of the carpenter's square will be covered in tape. The
carpenter's square is then placed just proximal to the treatment mark while the
level on the horizontal arm is used to maintain a level measure.
3. Marks will be made on the muscle belly parallel to the marks on the vertical axis
at 1.0, 1.75 and 2.5 cm depths.
4. A mark is also made on the horizontal arm tape in line with the treatment mark on
the medial gastrocnemius.
2. The Terason uSmart 3300 diagnostic ultrasound unit will be used to measure the adipose
thickness over the treatment area and look for abnormalities in the treatment and
thermocouple insertion areas. Aquasonic® 100 ultrasound gel will be placed on the 15L4
transducer. The transducer with gel will be placed over the mark of the treatment area.
Once the transducer is in place, the screen will be frozen and the skin and adipose
thickness will be measured using the caliper tool.
3. The thermocouples will be removed from the MetriCide after sterilizing for a minimum of
12 hours prior to insertion.
1. The distal aspect of the thermocouple will be wiped dry with sterile gauze.
2. A mark with a sharpie will be made on each thermocouple just past the length marked
on the horizontal arm of the carpenter's square. This allows the tip of each
thermocouple to be directly below the treatment site. A second mark will be made at
5 cm to make sure the thermocouple does not go too deep into the tissue.
3. The distal end of the thermocouple will be wiped clean again using a 70% isopropyl
alcohol wipe up to the marks and then the thermocouple will be wrapped in sterile
gauze until it is inserted.
4. The insertion areas will be shaved to remove any body hair (if necessary) and cleaned
using Betadine.
a. Once the Betadine dries, 70% isopropyl alcohol will be wiped over the insertion area
and given time to dry.
5. The subject will be instructed to take two deep breaths, while the researcher lightly
grasps the gastrocnemius to confirm muscle relaxation.
1. During the second exhalation, the 1.16 in needle catheter will be placed into the
subject's calf at the 1.0 cm depth insertion mark using the level to guide the
needle in. The needle will be removed leaving the catheter in the tissue.
2. The thermocouple will be threaded through the catheter to the appropriate depth
marked on the thermocouple and the catheter will be removed.
3. The thermocouple will be secured using medical tape to keep it from moving.
4. This procedure will be performed 3 times, with one thermocouple placed at each
respective depth: 1.0 cm, 1.75 cm, and 2.5 cm.
6. Each thermocouple will be attached to the Iso Thermex electronic thermometer (Columbus
Instruments, Columbus, OH), which will measure and record intramuscular temperatures
from the tips of the thermocouples.
7. An ultrasound treatment template will be applied at the treatment site and secured with
tape to maintain consistent treatment size.
a. This template will be twice the size of the transducer's Effective Radiating Area
(ERA).
8. A metronome will be utilized to consistently move the transducer at a rate of 4 cm/s .
9. The ultrasound treatment will begin once the intramuscular temperature has remained the
same for a minute.
10. Each subject will receive one ultrasound treatment at the following parameters: 3 MHz
frequency, 1.0 W/cm2 intensity, and 100% duty cycle using the Chattanooga Intelect®
Legend XT.
a. Termination of treatment will result when any of the following occur: i. A 15-minute
treatment time is obtained. ii. A 4°C temperature increase occurs at all three depths as
this has been shown as the necessary temperature change to increase tissue
extensibility.
iii. A 45°C temperature is reached at any depth, due to concern of tissue damage at high
temperatures.
iv. The subject experiences any pain or discomfort during the treatment.
11. Following the treatment, the ultrasound gel will be wiped from the leg, the template and
thermocouples will be removed, and the insertion sites will be cleaned with 70%
isopropyl alcohol wipes and covered with a band aid.
12. The subject will then be instructed on the possibility of minor soreness for the next
day or two and instructed on an icing schedule to decrease discomfort.
Inclusion Criteria:
- males and females between the ages of 18 - 35 years old, able to speak English, and
have less than 1 cm of adipose over the left medial gastrocnemius muscle.
Exclusion Criteria:
- any current lower extremity injury; or any lower extremity injuries within the last 6
months; open wounds, skin infections, impaired circulation, peripheral vascular
disease, deep vein thrombosis, advanced arthritis, poor thermal regulation, anesthetic
areas, neoplasms/tumors, thrombophlebitis, or closed infections; any allergies or
sensitivities to betadine; any abnormalities observed in the medial gastrocnemius
muscle determined by diagnostic ultrasound; or 1.0 cm or greater adipose over the left
medial gastrocnemius muscle.
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