PRINCIPLES OF STATIC Orthoses Flashcards
what should the therapist evaluate Prior to Orthosis design?
– Neurovascular status
– Mobility
– Motor function
– Edema
– Tone
– Cognition
what is the Biomedical (biological) perspective?
orthosis used as remediation or compensation.
Remediation allows patients to restore ROM, strength, and endurance
what are the principles of orthoses?
- Design and Pattern Construction
- Mechanical
- Biomechanical
- Anatomical
what is the axis when making an orthosis?
the joint we are trying to immobilize
what does pressure =
total force/area of force application
how can we increase comfort of an orthoses?
make it wider and longer
when using an orthosis to immobilize a joint, how should we design it?
to support that joint to
maximize effectiveness (MA) and
comfort
when using an orthosis to increase joint mobility, how should we design it?
to generate the
most efficient work, without impeding desired movement
how many points of fixation should there be?
if the length of the levers allows it, there should be 3
the middle fixation is typically placed over a joint
what are biomechanics principles?
- Eliminate Friction
- Consider ligamentous stress
- Awareness of the desired alignment is critical for dynamic
pull components(typically but NOT always aim for 90° pull)
what are anatomical principles?
- Accommodate bony prominences
- Consider vascular and neural
structures - Creases of the hand provide landmarks
for Orthosis fabrication
what visual guide can we use to help determine where an orthosis should start or end?
skin creases
what orthoses is the distal transverse arch important in?
an Orthosis that includes the metacarpals
when are arches formed?
during the dynamic movements of muscles of the hand
what are the ideal angles for all wrist/hand joints?
Wrist ~20 ext
MCP’s ~ 60 flex
IPs 10 flex
thumb ~mid-opp
