Orthoses and Orthotic Components

Question 1

IP Extension Assist

Answer 1

Function: Assist IP extension
Indications: IP Joint Weakness

Often used as a rehab tool to exercise finger flexors

Question 2

MCP Extension Stop aka Lumbrical Bar

Answer 2

Function: Prevents hyperextension of the MP
Indications: Hyperextension of MP, Lumbrical Weakness

Question 3

Thumb Post

Answer 3

Function: Statically positions the thumb for prehension
Indications: Absence of active opposition & thumb flexion for prehension

Question 4

IP Extension Assist with MP Extension Stop

Answer 4

Function: Useful for exercise of finger flexors
Indications: Inability to extend fingers at MP and IP Joints

Question 5

Adjustable MP Flexion Control

Answer 5

Function: MP extensor contractures
Indications: Lumbrical Weakness

Question 6

C-Bar aka Thumb Adduction Stop

Answer 6

Function: Statically holds thumb in abduction
Indication: Absence of active opposition, Tight thumb web space due to poor positioning or weak thumb abduction

Question 7

Thumb IP Extension Assist

Answer 7

Function: Dynamically extends the IP joint of the thumb for better grasp position
Indication: Thumb extensor weakness

Question 8

MP Extension Assist

Answer 8

Function: Assists MP Extension
Indication: Inability to extend finger at the MP joints
*Used only when active IP extension exists

Question 9

First Dorsal Interosseous Assist

Answer 9

Function: Abducts thumb to assist prehension
Indications: First Dorsal interosseous weakness

Question 10

Finger Platform

Answer 10

Function: Static MP & IP Stabilaztion
Indication: MP & IP joint weakness, Paralysis

Question 11

Static WHO

Answer 11

Supports the wrist joint
Maintains the functional position of the hand
prevents wrist hand deformities

Question 12

Static WHO Indications

Answer 12

Pts with severe weakness or paralysis of the wrist and hand musculature

C1-C5 Quadriplegics w/ 0 wrist extensors and an intrinsic minus hand

Question 13

WAWHO

Answer 13

Maintains the functional position of the hand
Prevents wrist and hand deformaties
Protect and assist weak wrist extensors with mechanical wrist motion stops

Question 14

WAWHO Indications

Answer 14

Weak (Poor to Fair) wrist extensors and paralyzed hand muscles.
Pts with potential for wrist extensor musculature return

Question 15

Ratchet WHO

Answer 15

Enables the patient to grasp and release objects by utilizing external power
Substitutes for finger flexor and extensor muscles that are less than grade 2(poor)

Question 16

Ratchet WHO Indications

Answer 16

Paralysis or severe weakness of the hand and wrist musculature
SCI pts w/ functional C4 with C5 return or functional C5 quadriplegia are appropriate candidates

Question 17

Wrist Driven WHO

Answer 17

Active wrist extensors provide grasp and gravity assisted wrist flexion enables the patient to open their hand

Question 18

Wrist Driven WHO Indications

Answer 18

Pt with paralysis or severe weakness of the hand

Pts with functional level of C5 with some C6 return( wrist extension), C6 and C7 quadriplegia