705 Flashcards
mechanisms of heat transfer
conduction
convection
radiation
conversion
shortwave diathermy microwave diathermy infrared light UV light Laser Are all forms of
electromagnetic therapy
By direct contact of body with heat or cold modality
conduction
particles (air or water) move across the body, creating a temperature variation
convection
transfer of heat from a warmer source to a cooler source through a conducting medium such as infrared lamps transferring heat through air
Radiation
converting one type of energy to a thermal energy
conversion
when does cryotherapy have the greatest benefit
acute injury
cold therapy indications
acute, chronic pain acute swelling myofascial trigger points muscle guarding, spasms acute muscle/ligament sprain acute contusion bursitits tenosynovitis tendinitis delayed onset muscle soreness
instructions for cryotherapy
within 24 hours of acute injury
apply for less than 20 min without pressure
BMI >25 will require longer
contraindications for cryotherapy
impaired circulation peripheral vascular disease hypersensitivity to cold skin anesthesia open wounds or skin conditions infections
indications for heat therapy
subacute, chronic pain subacute, chronic inflammatory conditions resolution of swelling.edema removal myofascial trigger points muscle guarding, spasms subacute muscle/ligament sprain subacute contusion
contraindications for heat therapy
impaired circulation peripheral vascular disease skin anesthesia open wounds or skin condiditons acute musculoskeletal conditions
typical temp of a warm whirlpool
98-110 degrees F
typical temp of a cold whirlpool
50-60 degrees F
treats chronic joint pain
relaxes stiff muscles
improves blood flow
helpful for chronic skin disorders such as eczema and psoriasis
increases ROM for people with arthritis, bursitis and other chronic conditions
Paraffin
characteristics of diathermy
thermal and non thermal effects
depth of penetration deeper
maintains higher temp 2-3 times longer than heating pad
emits electromagnetic energy at a much higher frequency 915-2450 MHz
frequency increases the penetration of energy in the tissue decreases, thus providing a more shallow tissue heating effect
generate a stronger electrical feild
microwave diathermy
continuous and pulsed
three specific frequencies and corresponding wavelengths
13 MHz, 22m
27 MHz, 11m
40 MHz, 7m
heating of deep tissues (continuous) or non thermal physiological effects (pulsed)
shortwave diathermy
occurs when both the biological tissues and oscillating generator are oscillating at the same frequency
only with complete resonance can the electromagnetic energy be fully delivered to the tissues
tuning
size of transducer that is producing the vibration
Effective radiating area
some parts of crystal may emit more energy than others (hot spots) move sound head at all times
this can be 6:1 or less and be acceptable
means on area of head is emmitting 6xs more energy
beam non-uniformity ratios
in ultrasound frequency and depth of penetration are
inversely related
higher frequency less penetration
lower frequency deeper penetration
transforms mechanical energy to electircal energy
piezoelectric effect
propagation through tissue
more dense tissue- closer together the molecules are and faster the energy will be transmitted and more energy will be absorbed
contraindications for ultrasound
not over abdomen or low back during pregnancy not to eyes, genital or over heart not over pacemaker not over tumors or abdominal growth not over infection or abscess not over ischemic areas not to insensate areas not in presence of thrombus not to epiphyseal plate in growing children
ultrasound is used to enhance delivery of selected medication into tissue
phonophoresis
contraindications for massage
edema from total system fialure acute inflammatory edema any area known or with suspected clot any site of known or suspected aneurysm tumors over open lesions, conditions that spread abnormal abdominal mass non union FX graft sites
long stroking, gliding movements following length of muscle
used to apply lubricant
begins and ends massage
not intended to move deep muscle mass
physiological effect when moving from periphery towards heart
effleurage
kneading, compress and release movements used to lift subcutaneous tissue up and off underlying structures
petrissage
small circular strokes with deep pressure done with the thumb; linear strokes done with sides of hand, finger tips, back of hand heel of hand
used to loosen/soften tight mm tissue
friction
percussive strokes using alternating hands in rapid rhythmic motion
tapping: finger tips
hacking: ulnar boarder of hands
cupping
pinchment: alternate pinching with thumb and index finger
tapotement
transmitting trembling motion from PT hands onto tissue
use after deep pressure of trigger point
used for joints after deep stroking
vibration
pull skin in opposite directions perpendicular to muscle
connective tissue massage
find tender area and may feel tightness in the area
apply pressure with finger or thumb
duration 1-5 min/point
trigger point massage
weight of water pushing against a surface
filtration force
hydrostatic pressure
attraction of water to large molecules
attracts water in from the interstitial space
osmotic pressure
lymph organs
thymus lymph nodes spleen tonsils lymph follicles of mucous memebrane
lymphatic failure
transport capacity normal
lymphatic load increased
dynamic
edema
lymphatic failure
transport capacity decreased
lymphatic load normal
mechanical
lymphedema
lymphatic failure
transport capacity decreased
lymphatic load increased
combination
lymphedema
lymphatic failure
transport capacity normal/decreased
lymphatic load increased due to right ventricular failure
hemodynamic
cardiacedema
lymph drainage contraindications
malignant diseases acute infection DVT cardiac edema renal fialure radiation fibrosis (local) peripheral arterial disease (compression)
the upward thrust acting in the opposite direction to the force of gravity
the more deeply immersed you are in water, the less you weigh
allows a reduction in oint compression forces by being weightless
buoyancy
the pressure exerted by a fluid at equilibrium due to the force of gravity
hydrostatic pressure
ideal temp for aquatic therapy
92 degrees
contraindications for aquatic therapy
any infection fever heart failure UTI incontinence epilepsy blood clots fear of water
aquatic therapy technique similar to tai chi slow movements and deep breathing movements must flow decrease pain, increase balance
ai chi
aquatic therapy technique
method of muscle re-education
therapist uses physiclal properties of water to interact with patient
bad ragaz
aquatic therapy technique
water and land based therapy
starts in water working on balance and postural awareness
focus on vertical alignment first, incorporate exercises in different planes
burdenko method
aquatic therapy technique
uses games for variety of educational and therapeutic reasons
used mainly with pediatrics and patients with disabilities
no buoyant aids are used
purpose is water freedom
hallwick
aquatic therapy technique cradling one on one program free flowing nature promotes self-awareness of muscle tension promote relaxation decrease pain
Watsu
contraindications for e stim
patients with an electronic demand-type cardiac pacemaker
over the carotid sinus
internally
over the eyes
transcranially or int he upper cervical regions in patient with history or CVA
transthoracically (careful of heart)
over any area that would have a tendency to hemorrhage
over laryngeal or pharyngeal muscles
where is a motor end plate generally found
proximal 1/3 of the muscle
movement of charged particles
measured in amps
current (I)
change in electrical potential between two points
the greater this is the deeper we can drive current into the body
how hard we push the current
voltage (V)
relative opposition to movement of charged particles
measured in ohms with direct current or impedence with alternating current
Resistance (R)
events in a definded amount of time, measured in pulses per second (pps), cycles per second (cps or Hertz), beats per second (bps)
frequency
intensity or maximum voltage
generally in millivolts (mV)
amplitude
Frequency: muscle contractions generally don’t get any stronger than ______. we use ______ with a long ______ pulse duration
50 Hz
20-40 Hz
>300 ms
frequency: sensory stimulation is generally delivered at _________ as a shorter pulse duration
80-120 Hz
getting used to a feeling and diverting attention from it
accommodation
modulations that can delay accomodation
amplitude modulation
frequency modulation
current flow in one direction for a finite period of time
phase
the time from the beginning to the end of an electrical event (even if the waveform leaves and returns to the baseline several times)
pulse
positively charged atoms
cations
negatively charged atoms
anions
negative terminal, attracts cations
cathode
positive terminal, attracts anions
anode
patients often report feeling a slight tingle prior to muscle movement but before it becomes painful, why is this
sensory fibers can be slightly bigger than motor fibers (pick up faster)
cutaneous nerves are near the skin surface where the current density is the greatest
stimulating bigger nerve fibers will override any signals coming from smaller ones through inhibitory interneurons
gate theory of pain control
electrotherapeutic current that stimulates peripheral nerves
TENS transcutaneous electrical nerves stimulators
electrotherapeutic current that stimulate muscle directly
neuromusclular electrical simulators NMES
gold standard for acute pain management
2 channels
variety of features depending on the unit
TENS transcutaneous electrical nerve stimulation
electrotherapeutic current contraindications
cardiac pacemakers HX of cardiac arrythmias phrenic or urinary bladder stimulators deep brain stimulators carotid sinus (scalene triangle) temporal lobe eyes larynx locations malignancy superficial skin lesion pelvic region in pregnancy anxiety
pain inhibition level 1
periphery
subsensory
pain inhibition level 2
occurs in dorsal horn
sensory
pain inhibition level 3
involves hormonal system
motor
pain inhibition level 4
involves brainstem sites and dorsolateral funiculus
noxious
pain inhibition level 5
involves cortical area
placebo
pain inhibition at the subsensory level
microcurrent electrical nerve stimulators MENS
peak amplitude below 1 mA (too low to stimulate either nerve or muscle)
pain inhibition at the sensory level
below motor threshold
conventional TENS
pain inhibition at the motor level
used for subacute or chronic pain
visible muscle contraction
current density is affected by ______
placing the electrodes closer together results in _______
spacing of the electrodes
superficial current density
1 pps=
muscle twitch
10 pps =
summation
25-30 pps =
tetanus
NMES electrode placeement
active electrode should be negative
negative electrode placed distally and positive electrode placed proximally