soal modul Flashcards
Contraindication of vigorous heating therapy
a. Mechanical LBP w/ muscle spasm
b. Osteoarthritis patient w/ joint contracture
c. LBP caused by spondilolisthesis
d. LBP caused by herniation nucleus pulposus
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Frequency of SWD use in Indonesia
a. 13.66 Mhz
b. 22 MHz
c. 27.33 MHz
40. 98 MHz
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The non thermal effect of ultrasound is not:
a. Standing waves
b. Superimposed waves
c. Microstreaming
d. Increase microcirculation
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Iontophoresis is
a. Use US energy to deliver topically medication
b. Method of transdermal administration of ionized drug by internal electrical field
c. Method of subdermal administration of ionized drug by external electrical field
d. Method of transdermal administration of ionized drug by external electrical field
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The effect of acoustic streaming is
a. Increased membrane cell activity
b. Decrease protein synthesis
c. Increase extentiability of tendon
d. Decrease electrical activity
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Spatial peak intensity in USD is
a. Total power output of the applicator divided by the area of applicator face
b. Greatest intensity anywhere over the area of the transducer
c. Average intensity over both on and off cyle
d. Similar to beam non-uniformity ratio
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24500 MHz frequency MWD is the most widely available but not satisfactory to achieve therapeutic heating because of 2450 MHz…
a. Are also used in telecommunication (mobile phones and satellite)
b. Radiation is reflected almost 50%
c. Particularly absorbed in tissue with high water and ion content
d. Are more rapidly absorbed in fatty tissue and bone
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Jony, 35 y.o, felt pain at gastrocnemius muscle of right foot since 3 days ago. Tightness (+). The best treatment is
a. US (1MHz, pulsed, 1.2 watt)
b. US (3MHz, continuous, 1.2 watt)
c. US (1MHz, continuous, 1.2 watt)
d. US (3MHz, pulsed, 1.2 watt)
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Duty cycle is
a. Duration of pulse time (on)/pulse period (on+off)
b. Duration of pulse time (off)/pulse period (on+off)
c. Duration of pulse period (on+off) /pulse time (on)
d. Duration of pulse period (on+off) /pulse time (off)
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Accordign to Beam Non-uniformity Ratio (BNR) in USD
a. Ideally machines should have a BNR of 6-7
b. BNR is the ratio between peak intensity and lowest intensity of the US beam
c. BNR is an important measurement because of the irregularity of the areas of intensity in the ultrasound beam
d. The higher the BNR the more uniform the US beam
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The best coupling medium in ultrasound treatment is
a. Gel
b. Degassed water
c. Cream
d. Air
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Which tissue has the lowest half-value depth in USD
a. Fatty tissue
b. Muscle
c. Bone
d. None of the above
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The essential requirements of a couplant (coupling agent) are that it has
a. An acoustic impedance lower from the tissue being tested
b. High susceptibility to bubble formation
c. A chemically inactive nature
d. Low transmissivity for ultrasound
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TRUE for ERA
a. ERA usually in the same size as the actual face of the treatment head
b. Using a 5 cm2 ERA is preferable in small area such as temporomandibular joint
c. The ERA normally cover 85% of the actual area
d. A 10 cm2 head of transducers offers more congruence with the skin than a 5 cm2 head
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Contraindication of USD except
a. Pacemaker
b. Electronic implants
c. Metal implants
d. Atherosclerosis
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To achieve a uniform electric field in SWD treatment
a. The size of electrodes should be a little larger than the part being treated
b. The size of electrodes should be the same as the part being treated
c. The size of electrodes should be a little smaller than the part being treated
d. The electrodes should be put in close spacing with the part being treated
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According to the electrode positioning in SWD treatment
a. The coplanar technique also known as the transverse technique
b. The coplanar technique produces greater heating in superficial muscle and tissue close to the electrode
c. The crossfire technique is useful for treating the sinuses
The contraplanar technique is applied useing two electrode positions in succession
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Electrodes should be avoided in obese or overweight patients in SWD treatment
a. Capacitive electrode
b. Drum-type electrode
c. Monode electrode
d. Inductive electrode
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Magnetron is a part of
a. SWD
b. MWD
c. USD
d. IRR
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Which statement true to physiological effects of MWD on the tissue
a. The amount of heating will be lower than the amount of absorbed radiation
b. Microwave are strongly absorbed by tissues of lower water and ion content
c. Heating from microwave radiation would be greatest in fatty tissue and bone
d. When the electromagnetic energy of microwave radiation is absorbed in the tissue, it will provoke ionic movement, rotation of expolles and electrons orbit distortion
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The main mechanism of energy transfer in MWD is
a. Conduction
b. Convection
c. Radiation
d. Conversion
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The physiologic effect of heat in general a. Increased chronic inflammation b. Decreased acute inflammation c. Decreased bleeding Increased edema
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Attenuation process is
a. Occurs in SWD treatment
b. Occurs as ultrasonic waves travel through tissue and lose a proportion of their energy
c. The amount of the ultrasound beam which spread out from the transducer
d. Occurs mainly because of beam deflection
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The most common technique of ultrasound application is
a. Circular technique
b. Strocking technique
c. Stationary technique
d. None of the above
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The therapeutic target temperature of diathermy in tissue is generally considered to be
a. 38-40oC
b. 40-44oC
c. 45-48oC
d. 48-50oC
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Standing waves in USD
a. Is produce especially in stationary techniques of US application
b. Is the product of the velocity of sound and the density of the medium
c. Is produced by stable cavitation
d. Is produced because of the difference in acousstic impedance
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MWD
a. Is the therapeutic application of low frequency current
b. The use of 915 MHz would be advantageous over 2456 MHz
c. Techniques of application is condenser technique and induction coil
d. MWD consist of power supply, oscillating circuit and patients circuit
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