FINAL EXAM Flashcards
electrical modality used for pain control muscle spasm edema and strengthening
high volt modalities
low volt is ____ and high volt is ____
150v
150-500v
high volt modality machine are: (3 characteristics)
unidirectional
monophasic
interrupted
Direct current
high volt machine generates electromotive force up to
500 volts
physiological effects of high voltage
endogenous opioids
improved lymph drainage
decrease muscle spasm
local circulatory increase
Ardnt-Schultz Law
physiologic effects of energy absorption are concentration dependent
law of grothus and draper
energy is either absorbed superficial or transmitted to deeper layers
therapeutic effects of high volt
similar to IFC, russian, biphasic
same uses as medium frequency modalities
recommended frequencies of high voltage
pain reduction 70-110 pps
muscle spasm: 70-110 pps
muscle reeduction: 15 pps
edema <10pps
Contraindications for high voltage
neoplasia
sensory issue
Not over head
pacemakers
pregnancy
circulatory problems
metal in the area
polarity and effects
positive–>
negative –>
Positive: analgesia, vasoconstriction, germicidal
Negative: trigger pts, vasodilation, adhesions, muscle re-ed
what is Iontophoresis?
utilizing polarity of direct current to introduce chemicals into superficial tissues
Iontophoresis is done by:
using gauze soaked in a chemical covered by an electrode
what is the depth of iontophoresis?
1-2mm
.5ma/cm2
what is Phonophoresis?
ultrasound waves are used to drive substances through skin
substance is mixed into the coupling medium
what are some charactersitics of phonophoresis treatment?
1mhz
5-10min
1 w/cm2
contraindications to phonophoresis
broken skin
allergy
decreased sensation
malignancy
pregnancy
what is the acronym for Transcutaneous electrical nerve stimulation?
TENS
what is the purpose of TENS?
sensory stimulation for pain control but muscle contraction can occur
TENS parameters consist of:
alternating current
variation of faradic/square waveforms
70-150pps
width; 40-500 microseconds
low frequency tens typically have
longer widths
placement of TENS pads
dermatomes, nerve pathways, acupuncture points for pain control
muscle belly for contraction
indications for TENS
acute pain
chronic-if used daily
neuropathy-overplexus if used daily
obstetrical- depends on position of fetus in labor
contraindications of TENS
metal
poor sensation
local skin lesion
rash in the area
treatment protocol of TENS
high and low frequency in one session
30-45min
Mild SLS to Strong SLS
main goal of treatment of biofeedback is to train a patient to
perceive physical or biomechanical changes without the use of measuring instruments
intrinsic feedback is defined as:
cutaneous, vestibular, proprioceptive input sent to CNS
extrinsic feedback is defined as:
verbal, mechanical cues that a movement or function can be changed
(outside of the patient)
electrical biofeedback is defined as:
therapeutic procedure that uses electronic or electromechanical instruments to accurately measure, process, and feedback reinforcing via auditory or visual
effects of biofeedback are achieved via:
achieved by active work on patients part or by influencing physiological mechanisms
what are the 6 effects of biofeedback?
decrease spasm
decrease HR/RR
decrease BP
increase strength
decrease pain
decrease depression
what are 6 advantages of biofeedback?
small changes can be seen quicker
immediate identification of results
illustrates progress of rehab for patient
reduces stress from lack of improvement
identifying training problems
scientific approach to rehab
what are 4 types of biofeedback instruments?
peripheral skin temp
finger photo-transmission unit
skin conductance activity
electromyographic activity
what are 4 disadvantages of biofeedback?
rely on extrinsic input from device over internal
weaning off device if dependent
instrument makes activity exercise like as opposed to free flowing
mechanical failure
instruments in biofeedback do not:
measure the physiologic event directly, but an aspect correlated with it
(muscle contraction strength is not measure with EMG)
what are 4 devices used to measure forms of biofeedback?
sphygmomanometer
thermometer
EKG
EEG
what are some devices or tests that do not measure biofeedback?
lab studies
scales
height
imaging
what is EMG biofeedback?
nerve impulse reaches muscle and is sensed by the electrode
gives either visual (graph, oscilloscope) or auditory feedback (beep)
the sound in ultrasound is produced by what?
piezoelectric effect
rapid expansion and contraction of the crystal as AC passes
soundwaves of ultrasound are either:
1mhz -deep
3mhz- superficial
what is the audible range for human hearing?
20-20,000hz
provide some characteristcs of 1 mhz vs 3mhz ultrasound penetration:
1mhz= 2-5cm
3mhz= 3mhz- 1-2cm
what is the duty cycles of ultrasound?
20% acute
50% subacute
cont- chronic
what is the intensity of ultrasound?
.5-1w/cm2 thin acute
1-1.5 acute thin
1-1.5w/cm2 chronic thin
1.5-2w/cm2 chronic thick
continuous ultrasound has a ____ effect
thermic effect 100% duty cycle
what are some benefits of ultrasound?
histamine release to enhance inflammation
increase temp
soften collagen
decrease pain
what are some contraindications of ultrasound?
vascular insufficiency
over reproductive organs
over eyes
over gravid uterus
near pacemaker
over tumor
over joint replacements or open GP
ultrasound frequency should not exceed _______
14 days
can be 6-8 days
what are some thermal effects of ultrasound?
collagen extensibility
decrease joint stiffness
reduction of muscle spasm
increase blood flow
1mhz and 1.5w/cm2- .2C increase
3mhz and 1.5w/cm2 - .6c per minute increase temp
ultrasound can cause non-thermal effects like:
cavitation
-stable and unstable cavitation
acoustic streaming-increase membrane permeability
sound travels faster in ______ (water or air)
water than air so a coupling medium is needed for ultrasound
for bladder and underwater ultrasound, intensity is changed in which way:
increase .5w/cm2
immersion, the head is held .5-1.0cm away
what is combination therapy?
using ultrasound and electrical stim through transducer head
with regards to combo therapy, the dispersal electrode of combo must be:
4x area of transducer head
the treatment area of ultrasound must not be:
> 2-3x transducer head
what are some diathermy adverse effects?
patients with implanted brain stimulators died after receiving diathermy
following treatment for scoliosis and oral surgery as well
what are 3 types of diathermy?
short wave
microwave
ultrasound
diathermy is a form of:
deep heat that is conversion since the energy is converted within the tissue
what are some diathermy effects?
high frequency electromagnetic energy 10-100million hz
dense tissue becomes warmer than less dense