POAT exam 1 Guide
force - answermass x acceleration
Torque - answerF x Moment Arm Length
pressure - answerforce/area
Linear Static equilibrium - answerRotational Static Equilibrium
Orthosis - answer"An externally applied device applied to a part of the body to correct
deformity, improve function, or relieve symptoms of a disease
Temporary, (a.k.a. off-the shelf, prefabs - answerAssess functional benefits/symptoms
Assess practical applications Short term uses ◦ Healing ◦ Function/training aid ◦
Contracture prevention Generic fit Usually less costly
Definitive orthosis - answerWhen permanent benefit is needed. When mechanically and
physiologically stable Custom fit More costly
Fixed Deformities - answerCan not be passively corrected.
Dynamic Deformities - answerResult from over- activity of muscle tendon groups but
when at rest are passively correctable. ◦Can also develop in adjacent joints in response
to coupling effects of deformities above or below
Corrective Control Systems Utilized by L.E. Orthoses: - answerGRF Control System(s)
3-Point (pressure) Control System(s)
Forces in Orthotic Design - answerEach plane and direction of motion under orthotic
control must have at least ONE 3-point loading system
Mechanical Goal(s) of Orthotic Interventions - answerApply forces of specific magnitude
at specific point(s) on a limb/trunk segment to achieve desired control.
. Orthotic forces are:? - answerdistributed over large surface areas to minimize local
skin and ST pressures. b) applied using larger moments arms possible/practical
biomechanical motion from anatomical axes are multiplanar? why is this diffcult? -
answer◦ Difficult to match ANY orthosis' mechanical axis with the normal dynamic
multiplanar anatomical axis
, Static - answerorthotic devices with no moveable joints incorporated into the design ◦
Block motion(s) ◦ Alter local pressures
Dynamic - answerOrthotic devices with moveable joints. ◦ Blocking/control of selected
motions ◦ Supporting/substituting for weak ms. ◦ Increase motion via traction
Well-designed shoes are - answerthe absolute foundation for most LE orthotic and
prosthetic interventions
EACH PART OF THE SHOE CAN? - answerENHANCE OR INTERFERE WITH LE
ORTHOTIC MANAGEMENT
"Stability Shoe" - answerSTJ medial control/protection
"Motion Control Shoe" - answermedial and lateral STJ + MTJ protection
"Neutral Shoe" - answercushioning/shock absorption, not designed for "control"
Three Tests to Determine any Shoe's Functional Stability Characteristics - answer1.
Torsional Rigidity 2. Heel Counter Stiffness/Rigidity 3. Flexion Stability
phases of rehabilation - answer1.Acute care
2.Pre-prosthetic (or orthotic) training
3.Basic prosthetic (or orthotic) training
4.Advanced functional skills training
1. acute care - answeruInitial management and protective healing
uApproximately 1-3 weeks after injury or amputation
uWound healing, edema management/control, pain control, infection prevention
uMedical management, community support and peer support
2. Pre-prosthetic (or orthotic) training - answeruApproximately 4-12 weeks after injury or
amputation
uContinued edema management and shaping (if needed), scar mobilization as
tolerated, pain management
uIncrease strength and ROM
3. Basic Prosthetic (or orthotic) training - answeruApproximately 6-12 weeks after injury
or amputation
uTimeline is lengthened when patients have comorbidities which delay wound healing
u
uBecome familiar with orthotic or prosthetic device, gain independence with skin care
and management, progressive increase with wearing tolerance, gain independent with
donning and doffing device, gain understand prosthetic components
force - answermass x acceleration
Torque - answerF x Moment Arm Length
pressure - answerforce/area
Linear Static equilibrium - answerRotational Static Equilibrium
Orthosis - answer"An externally applied device applied to a part of the body to correct
deformity, improve function, or relieve symptoms of a disease
Temporary, (a.k.a. off-the shelf, prefabs - answerAssess functional benefits/symptoms
Assess practical applications Short term uses ◦ Healing ◦ Function/training aid ◦
Contracture prevention Generic fit Usually less costly
Definitive orthosis - answerWhen permanent benefit is needed. When mechanically and
physiologically stable Custom fit More costly
Fixed Deformities - answerCan not be passively corrected.
Dynamic Deformities - answerResult from over- activity of muscle tendon groups but
when at rest are passively correctable. ◦Can also develop in adjacent joints in response
to coupling effects of deformities above or below
Corrective Control Systems Utilized by L.E. Orthoses: - answerGRF Control System(s)
3-Point (pressure) Control System(s)
Forces in Orthotic Design - answerEach plane and direction of motion under orthotic
control must have at least ONE 3-point loading system
Mechanical Goal(s) of Orthotic Interventions - answerApply forces of specific magnitude
at specific point(s) on a limb/trunk segment to achieve desired control.
. Orthotic forces are:? - answerdistributed over large surface areas to minimize local
skin and ST pressures. b) applied using larger moments arms possible/practical
biomechanical motion from anatomical axes are multiplanar? why is this diffcult? -
answer◦ Difficult to match ANY orthosis' mechanical axis with the normal dynamic
multiplanar anatomical axis
, Static - answerorthotic devices with no moveable joints incorporated into the design ◦
Block motion(s) ◦ Alter local pressures
Dynamic - answerOrthotic devices with moveable joints. ◦ Blocking/control of selected
motions ◦ Supporting/substituting for weak ms. ◦ Increase motion via traction
Well-designed shoes are - answerthe absolute foundation for most LE orthotic and
prosthetic interventions
EACH PART OF THE SHOE CAN? - answerENHANCE OR INTERFERE WITH LE
ORTHOTIC MANAGEMENT
"Stability Shoe" - answerSTJ medial control/protection
"Motion Control Shoe" - answermedial and lateral STJ + MTJ protection
"Neutral Shoe" - answercushioning/shock absorption, not designed for "control"
Three Tests to Determine any Shoe's Functional Stability Characteristics - answer1.
Torsional Rigidity 2. Heel Counter Stiffness/Rigidity 3. Flexion Stability
phases of rehabilation - answer1.Acute care
2.Pre-prosthetic (or orthotic) training
3.Basic prosthetic (or orthotic) training
4.Advanced functional skills training
1. acute care - answeruInitial management and protective healing
uApproximately 1-3 weeks after injury or amputation
uWound healing, edema management/control, pain control, infection prevention
uMedical management, community support and peer support
2. Pre-prosthetic (or orthotic) training - answeruApproximately 4-12 weeks after injury or
amputation
uContinued edema management and shaping (if needed), scar mobilization as
tolerated, pain management
uIncrease strength and ROM
3. Basic Prosthetic (or orthotic) training - answeruApproximately 6-12 weeks after injury
or amputation
uTimeline is lengthened when patients have comorbidities which delay wound healing
u
uBecome familiar with orthotic or prosthetic device, gain independence with skin care
and management, progressive increase with wearing tolerance, gain independent with
donning and doffing device, gain understand prosthetic components
