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Here are the diagrams of the Functional Resting Hand Splint:

Diagram 1 - Components Labeled (Clinical Photo)

Resting Hand Splint - Labeled Components
The four main components are clearly labeled:
  • Pan - supports the fingers and palm
  • C bar - keeps the webspace of the thumb positioned in palmar abduction
  • Thumb trough - cradles the thumb, at least ½ inch to support the thumb
  • Forearm trough - supports the weight of the forearm

Diagram 2 - Fabrication Guide (Visual Instructions)

Resting Hand Orthosis - Fabrication Diagram
This diagram shows how the splint is assembled and worn, highlighting purpose and features:
  • Immobilize the involved structures
  • Prevent further deformity
  • Position the hand and wrist in a functional alignment
  • Reduce inflammation through rest

Diagram 3 - Pattern Tracing Template

Resting Hand Splint - Pattern Template
This is the tracing/cutting pattern used to fabricate the splint, with landmarks marked (radial styloid, ulnar styloid, CMC joint of thumb, webspace, olecranon, etc.).

Key Positioning (Functional Resting Position)

JointPosition
Wrist20-30° extension
MCP joints45-70° flexion
IP jointsnear full extension (0-20° flexion)
Thumbpalmar abduction, opposing fingers
The splint is used for rheumatoid arthritis flares, stroke/spasticity, burns, tendon injuries, and crush injuries to maintain the hand in its functional resting posture.

Diagram of dynamic wrist and orthosis

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dynamic wrist extension orthosis radial nerve palsy splint components diagram

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dynamic wrist hand finger orthosis outrigger components labeled diagram OT splinting

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Here are the diagrams of the Dynamic Wrist Hand Orthosis (DWHO):

Diagram 1 - Dynamic Wrist Hand Orthosis (Radial Nerve Palsy / Wrist Drop Splint)

Dynamic Wrist Drop & Finger Extension Splint
Components labeled:
  • Finger lifts - slim & soft support to lift fingers into extension
  • Medical-grade fasteners - secure fit around forearm
  • Lightweight forearm base - supports the wrist in extension
This is the most common type used for radial nerve palsy (wrist drop), providing dynamic extension assistance.

Diagram 2 - Outrigger-Based Dynamic Orthosis with Biomechanics

Dynamic Orthosis - Outrigger Biomechanics Diagram
This diagram illustrates the key biomechanical concept:
  • Static outrigger - delivers high, constant force regardless of joint position (not ideal)
  • Dynamic outrigger - delivers graduated, controlled force that follows the arc of flexion (preferred)
  • F = Force of extensor pull (in Newtons)
  • D = Arch of flexion
The goal is to maintain a 90° angle of pull on the proximal phalanx (P1) throughout the range of motion.

Diagram 3 - Phoenix Outrigger Fabrication (Dynamic Wrist-Hand Orthosis)

Phoenix Outrigger - Dynamic Wrist Hand Orthosis Fabrication
Step-by-step fabrication showing:
  • Step 1 - Ulnar-based wrist support + outrigger bar aligned over P1 joints
  • Step 2 - Pulley anchor on dorsum, monofilament lines, rubber band tension system
  • Step 3 - Adjust to maintain true 90° line of pull; rubber bands replaced weekly

Key Components of a Dynamic Wrist Hand Orthosis

ComponentFunction
Forearm trough/baseStatic support; anchors the splint
Wrist supportHolds wrist in neutral or slight extension
OutriggerProjects away from the splint to redirect the line of pull
Pulley/anchorRedirects force to maintain 90° pull angle
Elastic/rubber bandsProvide dynamic traction force
Finger slings/loopsCradle each finger; transmit the elastic force
StrapsSecure the splint to the forearm

Common Indications

  • Radial nerve palsy (wrist drop) - most common
  • Extensor tendon repair - controlled mobilization
  • Post-fracture stiffness - regain wrist ROM
  • Burns - prevent contracture
  • Stroke/CVA with wrist extensor weakness

Drawable diagram

Generating Image

A clean, clearly labeled medical/educational drawable diagram of a Dynamic Wrist Hand Orthosis (DWHO) shown from a lateral/side view and dorsal view. The diagram should show: a forearm trough base extending from mid-forearm to palm, a wrist support holding the wrist in slight extension, a dorsal outrigger (wire frame projecting upward and distally over the fingers), finger slings/loops on each finger connected by monofilament lines to the outrigger, rubber bands or elastic traction from the outrigger to the finger slings, and velcro straps securing the forearm base. Each component should be clearly labeled with arrows pointing to: Forearm Trough, Wrist Support, Outrigger, Pulley/Anchor, Elastic/Rubber Bands, Finger Slings, Velcro Straps. Style: clean black and white line art suitable for a medical textbook or student study guide, with neat labels and leader lines.

Dynamic Wrist Hand Orthosis - Labeled Diagram
Here is a clean, drawable diagram of the Dynamic Wrist Hand Orthosis (DWHO) with all key components labeled:
LabelComponentFunction
Forearm TroughStatic base extending mid-forearm to palmAnchors the entire splint
Wrist SupportHolds wrist in ~20-30° extensionPrevents wrist drop
OutriggerWire/thermoplastic frame projecting dorsally over fingersDirects line of pull at 90° to P1
Pulley/AnchorFixed point on dorsum of splintRedirects elastic force
Elastic/Rubber BandsConnect outrigger to finger slingsProvide dynamic traction force
Finger SlingsLoop around proximal phalanx of each fingerTransmit force to extend fingers
Velcro Straps2-3 straps around forearmSecure the splint to the limb
This diagram is ideal for OT exam preparation and can be reproduced in notes. The key principle is maintaining a 90° angle of pull from the outrigger to the finger sling throughout the full range of motion.

Drawable diagram of dynamic finger extension ortosis

Generating Image

A clean, detailed medical educational drawable diagram of a Dynamic Finger Extension Orthosis shown from dorsal (back of hand) view. The diagram should clearly show: a hand-based thermoplastic base covering the dorsum of the hand and palm (metacarpal region), a low-profile outrigger wire arch projecting dorsally over all four fingers (index to little), individual finger slings made of soft loops placed around the proximal phalanx (P1) of each finger (index, middle, ring, little), monofilament lines running from each finger sling up to the outrigger, rubber bands or elastic traction attached from the monofilament to the outrigger providing extension force, velcro straps across the dorsum of the hand securing the base, and a thumb cutout showing the thumb is free. Each component must be clearly labeled with neat arrows: Hand-Based Thermoplastic Base, Low-Profile Outrigger, Finger Slings (on each finger), Monofilament Lines, Elastic/Rubber Band Traction, Velcro Strap, Thumb Cutout (free), 90° Angle of Pull arrow. Style: black and white clean line art, medical textbook illustration quality, suitable for student hand-drawing in OT or physiotherapy notes.

Dynamic Finger Extension Orthosis - Drawable Diagram
Here is the drawable diagram of the Dynamic Finger Extension Orthosis with all components labeled:

Key Components

ComponentDescription
Hand-Based Thermoplastic BaseCovers the dorsum/palm at metacarpal level; anchors the splint
Low-Profile OutriggerWire or thermoplastic arch projecting dorsally over fingers
Finger SlingsSoft loops placed around the proximal phalanx (P1) of each finger
Monofilament LinesConnect each finger sling to the outrigger
Elastic/Rubber Band TractionProvides continuous dynamic extension force
Velcro StrapSecures the base across the dorsum of the hand
Thumb CutoutThumb is left free for functional use
90° Angle of PullThe outrigger must be positioned so the pull is perpendicular to P1

Clinical Uses

  • Extensor tendon repair - controlled early mobilization
  • PIP/MCP joint stiffness - regain extension ROM
  • Radial nerve palsy - hand-based version for finger extension only
  • Post-fracture contracture - stretch flexion contractures
  • Burns - prevent or correct extension lag

Key Principle

The outrigger height and angle must be adjusted so the line of pull remains at 90° to the proximal phalanx throughout the full arc of motion - this ensures consistent, safe force application without joint compression.

Diagram of dynamic finger flection orthosis draw

Generating Image

A clean, detailed medical educational drawable diagram of a Dynamic Finger Flexion Orthosis shown from the lateral (side) view and palmar (front) view of the hand. The diagram should clearly show: a forearm or hand-based thermoplastic base on the dorsal/volar surface, a palmar outrigger or pulley bar positioned at the palm level below the fingers, individual finger slings or nail hooks attached to the fingertips or middle phalanx of each finger (index, middle, ring, little), rubber bands or elastic cords running from each finger sling downward and palmarly toward the outrigger/pulley, pulling the fingers into flexion toward the palm, the MCP joints being pulled into flexion, a wrist strap and forearm strap securing the base, and a thumb left free. All components must be clearly labeled with neat arrows: Dorsal Forearm Base, Palmar Outrigger/Pulley Bar, Finger Nail Hook or Sling (on fingertip), Elastic Rubber Band pulling into flexion, Direction of Flexion Force (arrow toward palm), Velcro Wrist Strap, Thumb Free. Also show a small inset diagram of the 90 degree angle of pull at the proximal phalanx. Style: black and white clean line art, medical textbook quality, suitable for OT or physiotherapy student hand-drawing study notes.

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Diagram of dynamic finger flection or touches to draw

Generating Image

Clean black and white medical textbook line art diagram of a Dynamic Finger Flexion Orthosis, lateral side view. Shows: dorsal forearm thermoplastic base, palmar pulley bar at palm level, rubber bands pulling fingertips into flexion toward palm, nail hooks on fingertips, velcro straps on forearm. All parts labeled with arrows: Dorsal Base, Palmar Pulley Bar, Nail Hook, Rubber Band Traction, Flexion Force Direction, Velcro Strap. Simple clear style for student study notes.

Dynamic Finger Flexion Orthosis - Drawable Diagram
Here is the drawable diagram of the Dynamic Finger Flexion Orthosis with all components labeled:

Key Components

ComponentDescription
Dorsal Forearm/Hand BaseThermoplastic base on the back of the hand/forearm - acts as the anchor
Palmar Pulley BarPositioned at palm level; redirects the elastic force toward the palm
Nail Hook / Finger SlingAttached to fingertip or middle phalanx; connects finger to traction
Rubber Band / Elastic TractionPulls the finger toward the palm, creating dynamic flexion force
Flexion Force DirectionForce directed palmarly - toward the palm crease
Velcro StrapsSecure the dorsal base to the forearm/hand
ThumbUsually left free

How It Works

The rubber bands run from the nail hook (on the fingertip) down toward a palmar pulley bar or wrist anchor, creating a continuous, gentle pulling force that flexes the fingers toward the palm. The patient can actively extend the fingers against the resistance, then the elastic returns them to flexion.

Clinical Indications

  • Flexor tendon repair - early controlled mobilization (Kleinert protocol)
  • PIP/MCP flexion contracture - regain lost flexion ROM
  • Post-fracture stiffness - stretch extension contracture
  • Dupuytren's contracture - post-op mobilization
  • Burns - prevent extension contracture of fingers

Key Principle

The palmar pulley bar must be positioned so the rubber band pulls at 90° to the proximal phalanx, ensuring pure flexion force without volar subluxation at the MCP joint.

Diagram of radial nerve pals is splint

Generating Image

Clean black and white medical textbook line art drawable diagram of a Radial Nerve Palsy Splint (Wrist Drop Splint / Cock-up splint with dynamic finger extension). Lateral and dorsal view of the hand and forearm. Shows: volar forearm thermoplastic base holding wrist in 30-40 degrees extension, dorsal outrigger wire arch projecting over fingers, individual finger slings on proximal phalanx of index middle ring and little fingers, rubber bands from finger slings to outrigger providing dynamic extension force, thumb post holding thumb in extension and abduction, velcro straps on forearm. Clearly label all parts with arrows: Volar Forearm Base, Wrist in 30-40 degree Extension, Dorsal Outrigger, Finger Slings, Rubber Band Traction, Thumb Post, Velcro Straps. Add small note: Indication - Radial Nerve Palsy / Wrist Drop. Simple clean style for OT physiotherapy student hand-drawing notes.

Radial Nerve Palsy Splint - Drawable Diagram
Here is the drawable diagram of the Radial Nerve Palsy Splint (Wrist Drop Splint) with all components labeled:

Key Components

ComponentDescription
Volar Forearm BaseThermoplastic base on the palm/forearm side - main anchor
Wrist in 30-40° ExtensionCorrects the wrist drop deformity
Dorsal OutriggerWire/thermoplastic arch projecting over the fingers on the dorsal side
Finger SlingsSoft loops placed around proximal phalanx (P1) of all 4 fingers
Rubber Band TractionProvides dynamic extension force to MCP joints
Thumb PostHolds thumb in extension and radial abduction
Velcro Straps2-3 straps securing the forearm base

Why These Features?

In radial nerve palsy, the following muscles are paralyzed:
  • Wrist extensors (ECRL, ECRB, ECU) - causes wrist drop
  • Finger extensors (EDC, EIP, EDM) - cannot extend MCP joints
  • Thumb extensors/abductor (EPL, EPB, APL) - thumb drops into palm
The splint substitutes all three functions simultaneously.

Types of Radial Nerve Palsy Splints

TypeUse
Static cock-up splintSimple wrist support only; no dynamic finger extension
Dynamic wrist-finger-thumb splintFull substitution - wrist + finger + thumb extension
Tenodesis splintUses wrist movement to passively open/close hand

Indication

Radial nerve palsy at any level - Saturday night palsy, crutch palsy, humeral shaft fracture, or posterior interosseous nerve injury.

Next radial gutter splint

Generating Image

Clean black and white medical textbook line art drawable diagram of a Radial Gutter Splint shown from dorsal and lateral views of the hand and forearm. The splint covers the radial (thumb) side of the forearm, wrist, and extends along the radial border supporting the index and middle fingers (2nd and 3rd digits) in a gutter. Show: a thermoplastic trough running along the radial aspect of the forearm down to the fingertips of index and middle fingers, wrist in neutral position, MCP and IP joints of index and middle fingers supported in slight flexion, thumb left free and visible, velcro straps securing the splint at forearm and hand level. Clearly label all parts with neat arrows: Radial Forearm Trough, Wrist in Neutral, Index Finger (2nd digit) supported, Middle Finger (3rd digit) supported, Thumb FREE (not included), Velcro Straps, MCP joints in slight flexion. Add small note box: Indications - 2nd/3rd metacarpal fractures, index/middle finger fractures, de Quervain tenosynovitis variant. Simple clean style suitable for OT physiotherapy student hand-drawing study notes.

Radial Gutter Splint - Drawable Diagram
Here is the drawable diagram of the Radial Gutter Splint with all components labeled:

Key Components

ComponentDescription
Radial Forearm TroughThermoplastic running along the radial (thumb) side of the forearm
Wrist in NeutralHeld at 0° - neutral position
Index Finger (2nd digit)Supported in the gutter from MCP to fingertip
Middle Finger (3rd digit)Supported in the gutter from MCP to fingertip
MCP jointsHeld in slight flexion (~70-90°)
IP jointsHeld in near full extension (0-10° flexion)
ThumbLeft completely FREE - not included in the splint
Velcro StrapsAt forearm and hand level to secure the splint

Positioning Summary

JointPosition
WristNeutral (0°)
MCP joints (2nd & 3rd)70-90° flexion
PIP/DIP joints0-10° flexion (near extension)
ThumbFREE

Indications

  • 2nd and 3rd metacarpal fractures (most common)
  • Index and middle finger fractures (proximal/middle phalanx)
  • 2nd/3rd MCP joint injuries
  • Extensor tendon injuries to index or middle finger
  • Post-operative immobilization of radial-side finger procedures

Key Points to Remember

  • Covers the radial (lateral) border of the hand - index + middle fingers
  • Thumb is always free (differentiates it from a thumb spica or hand-based thumb splint)
  • The counterpart is the Ulnar Gutter Splint, which supports the ring and little fingers (4th & 5th digits) along the ulnar border

Next is mallet finger splint

Generating Image

Clean black and white medical textbook line art drawable diagram of a Mallet Finger Splint shown from lateral side view and dorsal view of a single finger. Show: a small thermoplastic or aluminium foam splint applied to the dorsal surface of the distal finger only, holding the DIP joint in full extension (0 degrees or slight hyperextension 5-10 degrees), PIP joint left completely free and mobile, fingertip visible, velcro strap or tape securing the splint at the middle and distal phalanx. Label all parts with neat arrows: Dorsal Splint on Distal Finger, DIP Joint in Full Extension (0 degrees), PIP Joint FREE and Mobile, Middle Phalanx, Distal Phalanx, Securing Strap or Tape. Add a small inset diagram showing the mallet deformity before splinting - finger drooping at DIP joint with extensor tendon rupture arrow. Add small note box: Indication - Mallet finger (extensor tendon rupture at DIP joint), Wear 6-8 weeks continuously. Simple clean style for OT physiotherapy student hand-drawing study notes.

Mallet Finger Splint - Drawable Diagram
Here is the drawable diagram of the Mallet Finger Splint with all components labeled:

Key Components

ComponentDescription
Dorsal SplintSmall thermoplastic or aluminium foam splint on dorsal surface of distal finger only
DIP JointHeld in full extension (0°) or very slight hyperextension (5°)
PIP JointLeft completely FREE and mobile - never included
Middle PhalanxProximal anchor of the splint
Distal PhalanxDistal end supported by the splint
Securing Strap/TapeTape or velcro holds splint firmly to finger

Positioning

JointPosition
DIP joint0° (full extension) or 5° hyperextension
PIP jointCompletely free - must be able to flex fully
MCP jointFree

Wearing Protocol

PhaseDuration
Continuous wear (day + night, never remove)6-8 weeks
Weaning/night splint onlyAdditional 4-6 weeks
Total treatment10-12 weeks
Critical rule: DIP joint must NEVER be allowed to flex even once during the initial 6-8 weeks - this restarts the healing clock from zero.

Indications

  • Mallet finger - rupture of the terminal extensor tendon at the DIP joint
  • Mallet fracture - bony avulsion of the dorsal base of the distal phalanx (if <1/3 of joint surface involved)
  • Caused by: forced flexion of an extended finger (ball sports, jamming injury)

Types of Mallet Splints

TypeDescription
Stack splintMost common prefabricated - volar + dorsal shell
Aluminium foam splintCustom-molded, applied dorsally
Thermoplastic custom splintMade by OT, better fit
Abouna splintDorsal application only

Next is oval 8 finger splint

Generating Image

Clean black and white medical textbook line art drawable diagram of an Oval-8 Finger Splint shown in three configurations on a single finger lateral view. Configuration 1 top: Oval-8 worn to block hyperextension at PIP joint - figure-8 shaped metal ring splint with two oval loops, dorsal loop blocking PIP extension, label: Blocks PIP Hyperextension, Swan Neck Deformity. Configuration 2 middle: Oval-8 reversed to block flexion at PIP joint, label: Blocks PIP Flexion, Boutonniere Deformity. Configuration 3 bottom: Oval-8 worn at DIP joint to block hyperextension, label: DIP Mallet Finger / Trigger Finger. Each configuration shows the figure-8 shape clearly with two oval rings connected in the middle, one ring proximal to joint and one ring distal to joint, the joint in the center of the crossing point. Label all parts: Upper Oval Ring, Lower Oval Ring, Crossing Point at Joint, PIP Joint or DIP Joint. Add note box listing indications: Swan Neck deformity, Boutonniere deformity, Mallet finger, Trigger finger, Lateral band instability. Simple clean medical illustration style suitable for OT student hand-drawing notes.

Oval-8 Finger Splint - Drawable Diagram
Here is the drawable diagram of the Oval-8 Finger Splint in all three configurations:

The Oval-8 Design

The Oval-8 is a figure-8 shaped metal or thermoplastic ring splint with two oval loops connected at a crossing point. The same splint can be worn in different orientations to treat different conditions.

Three Configurations

ConfigurationWorn AtHowBlocksCondition Treated
1 - Dorsal blockPIP jointDorsal loop over PIPHyperextensionSwan Neck Deformity
2 - Reversed (volar block)PIP jointRotated 180°Flexion / Boutonniere dropBoutonniere Deformity
3 - DIP applicationDIP jointDorsal loop over DIPDIP hyperextension or flexion dropMallet Finger / Trigger Finger

Key Components

PartDescription
Upper Oval RingSits proximal to the target joint
Lower Oval RingSits distal to the target joint
Crossing PointSits directly over the joint - acts as the block
Metal/Silver barThe rigid crossing point prevents motion in one direction

Indications

  • Swan Neck Deformity - blocks PIP hyperextension (most common use)
  • Boutonniere Deformity - blocks PIP flexion drop
  • Mallet Finger - blocks DIP flexion
  • Trigger Finger - blocks PIP snapping into flexion
  • Lateral band instability - controls lateral deviation at PIP
  • Rheumatoid Arthritis - joint instability management

Key Advantage

The Oval-8 is reversible - no need for a different splint. Simply flip it or rotate it to treat the opposite deformity at the same joint. It is also prefabricated, lightweight, and cosmetically acceptable for long-term use.

Boutonniere splint

Generating Image

Clean black and white medical textbook line art drawable diagram of a Boutonniere Deformity Splint shown in lateral side view of a single finger. Show two parts: Part 1 top - small inset diagram of Boutonniere Deformity showing PIP joint in flexion and DIP joint in hyperextension, with label: Boutonniere Deformity - PIP Flexion + DIP Hyperextension, central slip rupture arrow on dorsal PIP. Part 2 main diagram - the Boutonniere Splint (PIP extension splint) showing a small dorsal or three-point thermoplastic splint holding PIP joint in full extension 0 degrees, DIP joint left completely FREE and mobile, MCP joint free, proximal phalanx and middle phalanx as anchor points, securing straps or tape. Label all parts with neat arrows: Proximal Phalanx (anchor), PIP Joint held in FULL EXTENSION 0 degrees, Middle Phalanx (distal anchor), DIP Joint FREE and Mobile, Dorsal Thermoplastic Shell, Securing Strap. Add note box: Indication - Boutonniere Deformity (central slip injury), Wear continuously 6 weeks. Simple clean medical illustration style for OT physiotherapy student hand-drawing study notes.

Boutonniere Deformity Splint - Drawable Diagram
Here is the drawable diagram of the Boutonniere Deformity Splint with the deformity and splint both illustrated:

Understanding the Deformity First

FeatureWhat Happens
Central slipRuptures at dorsal PIP joint
PIP jointDrops into flexion (buttonholes through)
Lateral bandsMigrate volarly, pulling DIP into hyperextension
AppearancePIP flexed + DIP hyperextended = classic Boutonniere

The Boutonniere Splint - Key Components

ComponentDescription
Dorsal Thermoplastic ShellApplied to dorsal surface of PIP joint only
PIP JointHeld in full extension (0°) - allows central slip to heal
Proximal PhalanxProximal anchor point
Middle PhalanxDistal anchor point
DIP JointLeft completely FREE - active DIP flexion encouraged
Securing Strap/TapeHolds splint firmly against PIP

Positioning

JointPosition
MCP jointFree
PIP joint0° full extension (never allow flexion)
DIP jointFree - active flexion exercises prescribed

Wearing Protocol

PhaseDuration
Continuous wear (day + night)6 weeks
Night splint + day exercises2-4 weeks more
Total8-10 weeks
Key rule: Active DIP flexion exercises while wearing the splint are ESSENTIAL - this pulls the lateral bands dorsally back into correct position and helps restore extensor mechanism balance.

Comparison: Boutonniere vs Mallet Splint

FeatureBoutonniere SplintMallet Splint
Joint splintedPIP in extensionDIP in extension
Joint freedDIP (must flex)PIP (must be free)
Tendon injuredCentral slipTerminal extensor tendon
DeformityPIP flexion + DIP hyperextensionDIP flexion drop

Radial nerve palsy splint and thumb spoca orthosis

Generating Image

Clean black and white medical textbook line art drawable diagram of a Radial Nerve Palsy Splint (cock-up wrist drop splint with dynamic finger extension). Lateral and dorsal view. Shows: volar forearm thermoplastic base holding wrist in 30-40 degrees extension, dorsal outrigger wire arch over fingers, individual finger slings on proximal phalanx of all 4 fingers, rubber bands from finger slings to outrigger for dynamic extension, thumb post in extension and abduction, velcro straps on forearm. Label all parts: Volar Forearm Base, Wrist 30-40 degree Extension, Dorsal Outrigger, Finger Slings, Rubber Band Traction, Thumb Post, Velcro Straps. Indication note: Radial Nerve Palsy - Wrist Drop. Simple clean OT student study diagram style.

Generating Image

Clean black and white medical textbook line art drawable diagram of a Thumb Spica Orthosis (Short Opponens Splint) shown from dorsal and lateral view of the hand. Shows: forearm or wrist based thermoplastic trough extending along radial side of forearm and wrist, thumb trough or post immobilizing the thumb CMC and MCP joints in palmar abduction and opposition, IP joint of thumb left free and mobile, wrist held in slight extension 15-20 degrees, index and other fingers completely free, velcro straps at wrist and forearm. Label all parts with arrows: Forearm/Wrist Base, Thumb Trough (CMC + MCP immobilized), CMC Joint in Palmar Abduction, MCP Joint in slight flexion, Thumb IP Joint FREE, Wrist in 15-20 degrees Extension, Fingers FREE, Velcro Straps. Add indications note box: De Quervain Tenosynovitis, Thumb CMC Arthritis, Scaphoid Fracture, UCL Injury (Gamekeeper Thumb), Thumb Fractures. Simple clean medical illustration style for OT physiotherapy student hand-drawing study notes.


1. Radial Nerve Palsy Splint

Radial Nerve Palsy Splint - Drawable Diagram

Key Components

ComponentDescription
Volar Forearm BaseThermoplastic anchor along the palm side of forearm
Wrist in 30-40° ExtensionCorrects wrist drop deformity
Dorsal OutriggerWire arch over fingers directing extension force
Finger SlingsLoops at P1 of all 4 fingers
Rubber Band TractionDynamically extends MCP joints
Thumb PostHolds thumb in extension + radial/palmar abduction
Velcro Straps2-3 straps securing forearm base
Indication: Radial nerve palsy (wrist drop) - Saturday night palsy, humeral shaft fracture, crutch palsy

2. Thumb Spica Orthosis

Thumb Spica Orthosis - Drawable Diagram

Key Components

ComponentDescription
Forearm/Wrist BaseRadial-side thermoplastic trough from forearm to wrist
Thumb TroughImmobilizes CMC + MCP joints of thumb
CMC JointIn palmar abduction - functional rest position
MCP JointIn slight flexion (~10-20°)
Thumb IP JointLeft completely FREE
Wrist15-20° extension
FingersAll FREE
Velcro StrapsAt wrist and forearm

Indications

ConditionReason
De Quervain TenosynovitisRest APL + EPB tendons
Thumb CMC ArthritisOffload CMC joint
Scaphoid FractureImmobilize wrist + CMC
UCL Injury (Gamekeeper's/Skier's Thumb)Protect MCP ulnar collateral ligament
Thumb Metacarpal FractureStabilize 1st metacarpal

Quick Comparison

FeatureRadial Nerve Palsy SplintThumb Spica
TypeDynamicStatic
Wrist position30-40° extension15-20° extension
FingersSupported dynamicallyAll free
ThumbPost (extension/abduction)Trough (CMC+MCP immobilized)
Primary useNerve palsyCMC/thumb injuries

Short opponens and long opponius orthosis diagram

Generating Image

Clean black and white medical textbook line art drawable diagram of a Short Opponens Orthosis (hand-based thumb spica) shown from dorsal and lateral view. Shows: hand-based thermoplastic base covering only the palm and metacarpal area (does NOT extend onto the forearm), thumb trough holding thumb CMC and MCP joints in palmar abduction and opposition, thumb IP joint left free, all four fingers completely free, C-bar maintaining the first web space open, velcro strap across the dorsum of the hand. Label all parts with neat arrows: Hand-Based Thermoplastic (no forearm extension), C-Bar (maintains web space), Thumb Trough, CMC Joint in Palmar Abduction, MCP Joint supported, Thumb IP Joint FREE, Fingers ALL FREE, Velcro Strap. Add note box: Indications - Median nerve palsy, Thumb opposition weakness, Carpal tunnel syndrome, Mild CMC arthritis. Simple clean OT student study diagram style.

Generating Image

Clean black and white medical textbook line art drawable diagram of a Long Opponens Orthosis (forearm-based thumb spica) shown from dorsal and lateral view. Shows: long forearm-based thermoplastic trough extending from mid-forearm all the way to the hand, wrist held in 15-20 degrees extension, thumb trough holding CMC and MCP joints in palmar abduction and opposition, thumb IP joint left free, all four fingers completely free, C-bar maintaining first web space, two or three velcro straps on the forearm and one at the wrist. Label all parts with neat arrows: Long Forearm Trough (mid-forearm to hand), Wrist in 15-20 degree Extension, C-Bar (first web space), Thumb Trough, CMC Joint in Palmar Abduction, MCP Joint supported, Thumb IP Joint FREE, Fingers ALL FREE, Velcro Straps x3. Add note box: Indications - Rheumatoid arthritis, Scaphoid fracture, De Quervain tenosynovitis, Post-op thumb reconstruction, Severe CMC arthritis. Simple clean OT student study diagram style.


1. Short Opponens Orthosis (Hand-Based)

Short Opponens Orthosis - Drawable Diagram

Key Components

ComponentDescription
Hand-Based ThermoplasticCovers palm only - does NOT extend onto forearm
C-BarMaintains the 1st web space open between thumb and index
Thumb TroughHolds CMC + MCP in palmar abduction/opposition
CMC JointPalmar abduction - thumb pointing away from palm
MCP JointSlight flexion (~10°)
Thumb IP JointCompletely FREE
FingersAll FREE
Velcro StrapOne strap across dorsum of hand
Indications: Median nerve palsy, thumb opposition weakness, carpal tunnel syndrome, mild CMC arthritis

2. Long Opponens Orthosis (Forearm-Based)

Long Opponens Orthosis - Drawable Diagram

Key Components

ComponentDescription
Long Forearm TroughExtends from mid-forearm all the way to the hand
WristHeld in 15-20° extension
C-BarMaintains 1st web space open
Thumb TroughHolds CMC + MCP in palmar abduction/opposition
Thumb IP JointCompletely FREE
FingersAll FREE
Velcro Straps x3At mid-forearm, distal forearm, and wrist
Indications: Rheumatoid arthritis, scaphoid fracture, de Quervain tenosynovitis, post-op thumb reconstruction, severe CMC arthritis

Key Differences - Short vs Long Opponens

FeatureShort OpponensLong Opponens
BaseHand onlyForearm + hand
WristFREE - not includedImmobilized in 15-20° extension
Straps1 strap2-3 straps
ImmobilizationCMC + MCP onlyWrist + CMC + MCP
Bulk/weightLighter, less bulkyMore supportive, heavier
Best forFunctional use, mild conditionsPost-op, fractures, severe arthritis
Thumb IPFree (both)Free (both)
FingersFree (both)Free (both)

The C-Bar - Why It Matters

The C-bar is the curved thermoplastic bridge between the thumb post and the hand base. It:
  • Maintains the 1st web space in abduction
  • Prevents thumb adduction contracture
  • Is present in both short and long opponens orthoses
  • Named for its C-shape appearance when viewed from above

Thumb abduction orthosis and thumb post orthosis and finger gutter splint and ulnar gutter splint

Generating Image

Clean black and white medical textbook line art drawable diagram of a Thumb Abduction Orthosis shown dorsal and lateral view. Hand-based thermoplastic splint with a wide C-bar and web spacer holding the thumb in maximum radial and palmar abduction away from the palm, thumb MCP and IP joints free, fingers free, velcro strap on hand dorsum. Label: Wide C-Bar Web Spacer, Thumb in Maximum Abduction, MCP Joint Free, IP Joint Free, Fingers Free, Velcro Strap. Indications note: Adduction contracture prevention, Burn injury web space, Median nerve palsy. Simple clean OT student study diagram.

Generating Image

Clean black and white medical textbook line art drawable diagram of a Thumb Post Orthosis shown dorsal and lateral view. Small hand-based thermoplastic post or platform supporting only the thumb metacarpal and MCP joint in extension and abduction, thumb IP joint free, all fingers free, small velcro strap. Label: Thumb Post (metacarpal support), MCP Joint in Extension, CMC in Abduction, Thumb IP Joint FREE, Fingers FREE, Velcro Strap. Indications note: Thumb MCP instability, UCL repair, Gamekeeper thumb, Post-surgical stabilization. Simple clean OT student study diagram.

Generating Image

Clean black and white medical textbook line art drawable diagram of a Finger Gutter Splint shown lateral and dorsal view on a single finger. Aluminum foam or thermoplastic trough shaped like a U-gutter wrapping around one finger from tip to proximal phalanx, holding MCP PIP and DIP joints in slight flexion functional position, secured with tape or velcro. Label: Finger Gutter Trough (U-shaped), Proximal Phalanx, Middle Phalanx, Distal Phalanx, MCP Joint in slight flexion, PIP Joint supported, DIP Joint supported, Securing Tape or Velcro. Indications note: Single finger fracture, Soft tissue injury, Post-dislocation immobilization. Simple clean OT student study diagram.

Generating Image

Clean black and white medical textbook line art drawable diagram of an Ulnar Gutter Splint shown dorsal and lateral view of the hand and forearm. Thermoplastic trough running along the ulnar (little finger) side of the forearm and hand, supporting ring finger (4th digit) and little finger (5th digit) from proximal phalanx to fingertip in a gutter, wrist in neutral position, MCP joints in 70-90 degrees flexion, IP joints in near full extension, thumb and index and middle fingers completely free, velcro straps. Label: Ulnar Forearm Trough, Wrist Neutral, Ring Finger 4th digit in gutter, Little Finger 5th digit in gutter, MCP Joints 70-90 degree flexion, IP Joints near extension, Thumb + Index + Middle FREE, Velcro Straps. Indications: 4th and 5th metacarpal fractures, Boxer fracture, Ring and little finger injuries. Simple clean OT student study diagram.

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