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Ortho > Estim I > Flashcards

Estim I Flashcards

1
Q

Motor points?

A

Locations on the skin where E-stim causes specific mms to contract. Created by Duschenne.

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2
Q

Gate control theory?

A

Define later

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3
Q

What can Estim do in the clinic?(3)

A

Produce mm contractions
Pain control
Promote tissue healing

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4
Q

Estim for mm contraction is used for?(7)

A 
Strengthening
MM reeducation
Prevent atrophy
Prevent DVT
Prevent Pressure ulcers
Reduce mm spasms
Enhance transdermal drug delivery
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5
Q

3 types of electrical current wave forms?

A

DC (direct current)
AC (alternating current)
PC (Pulsed current)

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6
Q

What is DC?

A

A continuous electrical flow of charged particles.

Most commonly used in ionophoresis to stimulate contractions in mm)

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7
Q

What is AC?

A

An interrupted flow of charged particles

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8
Q

What can AC be used for?(3)

A

MM strengthening (contraction)
Pain control
Tissue healing
(most often used for Estim)

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9
Q

Interferential current?

A

Produced by the interruption of two med-Fq currents of slihtly different Fqs (4 electrodes used)

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10
Q

Premod current?

A

Alternating current with a med Fq 1000-10000Hz(2 electrodes)

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11
Q

Russian protocol?

A

Estim c specific parameters for quads mm strengthening.

Fq Med AC 2500Hz 10ms durration

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12
Q

Pulsed current types?(2)

A

Monophasic

Biphasic

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13
Q

Pulsed?

A

An interrupted flow of charged particles that flows in a series of pulses seperated by periods of no current.

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14
Q

Monophasic pulsed current?

A

Current only flows in one direction during a pulse

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15
Q

Biphasic pulsed current?

A

Current flows back and fourth during a pulse

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16
Q

Monophasic is used for?

A

Any Estim but most commonly for:
Tissue healing
Acute edema mgmnt

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17
Q

Most commonly used mono current?

A

High-volt pulsed current (HVPC)

18
Q

In MonoP the currents are equal T/F and opposite_____?

A

True, polarity

19
Q

In biP the currents are equal T/F and there is a ___ charge.

A

False

20
Q

Pulse duration?

A

How long each pulse lasts

21
Q

Shorter pulse durations are mostly used for?

A

Pain control

22
Q

Longer pulse durations are mostly used for?

A

MM contraction

23
Q

Phase duration?

A

The duration of one phase of the pulse.

24
Q

Amplitude?

A

The magnitude of the current voltage. Also called intensity.

25
Q

Frequency (Fq)?

A

Number of cycles or pulses per second. Measured in Hz or pps

26
Q

On time?

A

Time during which a train of pulses occurs.

27
Q

Off time?

A

Time between pulses

28
Q

On/off time are used for?

A

Estim for mm contractions. On=contraction off =relaxation. Expressed as a ratio Ie 10:50 10 on 50 off.

29
Q

Ramp up?

A

The amount of time for the amplitude to go from 0 to max during on time

30
Q

Ramp down?

A

The amount of time it takes for the amplitude to go from max to 0 during off time.

31
Q

Short pulses and low amps are used to?

A

Stimulate sensory nerves

32
Q

Long pulses and high amps are used to?

A

Stimulate motor nerves.

33
Q

Short pulse durations are more comfortable b/c?

A

They do not stimulate C fibers.

34
Q

Long pulse durations are uncomfortable b/c?

A

They stimulate A-delta and C fibers

35
Q

Does increasing the current amp or pulse duration beyond that needed to reach the action potential of a nerve make the AP larger or longer?

A

No

36
Q

Accomodotion?

A

The process by which a nerve becomes less responsive to stimulation.

37
Q

Can nerve propagation occur in both directions with Estim?

A

Yes

38
Q

APs travel faster in large/shot diameter, myelinated/unmyelinated nerve fibers?

A

Large, myelinated

39
Q

A-alpha fibers are large/small? Myelinated/unmyelinated?

A

Large, myelinated

40
Q

C fibers are myelinated/unmyelinated?

A

Unmyelinated

Ortho (23 decks)

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