Arthridites of the hand (excluding Rheumatoid) Flashcards
What is the definign feature of osteoarthristis?
Loss of articular cartilage
What is the epidemiology of OA of the hand
1/5 of the population, aged 55-65, F>M
Joints DIP>CMC>PIP
What is the pathophysiology of OA
- Abnormal articular cartilage
- loss of PG, + cytokines, chondrocytes response to mechanical forces altered
- Abnormal subchondral bone
- w expousre, bone becomes sclertotic w cysts, osteophytes
- Abnormal periarticular tissue
- inflam of synovium, capsule, swelling/stiffness
How do you classify Osteoarthritis
Primary
Secondary
- Trauma, Infection
- Metabolic (gout, CPPD, wilson’s D)
- Inflammatory
- Endocrinopathy (DM, acromegaly)
Describe your physical exam for OA
INSPECTION
- Joint deformity, scissoring, mucous cysts, nail ridge
- Bouchard (PIP) heberden (DIP) nodes
- bilateral
- Thumb
- shoulder sign, MCP hyperextension, 1st webspace adduction contracture
PALPATION
- crepitus, swelling, tenderness,
ROM
- diminished active, also passive if advanced
Motor sensory
- concomitant CTS in 40% of pts w CMC OA
Special test
- grind test
- grip strength
- distraction (pain if synovitis)
What are classic findings of OA on xray
- joint space narrowing
- subchondral cysts
- sub=chondral sclerosis
- osteophytes
What are goals of care for patient w OA of hand
- Pain relief
- Function improvement
- Deformity correction
- Cosmesis
How do you classify thumb OA?
Eaton Littler classification
specific to THUMB OA
What are non-operative treatment options for OA
- All patients should be given non-operative treatment first for OA
- Lifestyle (rest, activity modification)
- Heat
- Splint
- NSAIDs
- Intra-articular steroids
What are operative treatments for OA
Only after failed non-operative treatment
- DIP
- Mucous cyst aspiration/steroid
- Mucous cyst resection + osteophyte resect
- Arthrodesis
- PIP
- depends on patient demands
- arthrodesis vs arthroplasty
- MCP
- likely inflamamtory arthritis - treat underlying cause (hemochromatosis)
- arthrodesis vs arthroplasty
- CMC
- Tx based on stage
- arthroscopy, dorsal wedge
- isolated lig recon, isolated Trapeziectomy, LRTI, arthroplasty, arthordesis
What are indicaitions for bone graft in OA arthrodesis
- revision
- loss of bone stock/insufficient
- infection
- arthritis mutilans
Describe your operative management of DIP OA
OPTIONS
- Arthrodesis
- Indicated: deformity/pain/loss fx
- Key pts - need bone apposition/stock, fused at 0-5’
- Adv: resolves pain/deformity, well toelrated as DIP contributes<15% of finger flexion
- Disadv: loss of ROM
- Points: H/Y incision, rongeur/osteotomy for perfect apposition, fixation w kwire,screw,interosseous wire at 0-5’ flexion
- Arthroplasty
- indicated as above and desire to maintain some flexion
- Adv: maintained ROM
- Disadva: joint instbaility, extrusion
- silicone spacer - placed as above - average ROM 30’
- Mucous cyst
- aspiration - risk of septic arthritis, recurrence
- Excision - risk of loss of ROM, nail deformity, septic arthrosis, recurrence
Describe your operative management of PIP OA
ARTHRODESIS
- Indicated: high demand hand for stable joint
- Adv: stable
- DisAdv: loss of ROM - PIPjt responsible for 85% of digit and 20% hand flexion
- dorsal longitudinal incision, splint extensor, rongeur/osteotomy or cup and cone
- fuse index 40; long 45’, ring 50’, little 55’
- Fixation: oblique lag, axial compression screw, herbert screw, interosseous wire, kwire, plate
- Risk: loss of grip strength, non/mal union, pain infection
ARTHROPLASTY
- Indicated: passive RO preserved, adequate bone stock
- Adv: maintained ROM, av jt ROM 40-60
- Disadv: infection, implant failure, instability, not achieving full ROM, peristent/recurrence deformity
- Options
- Swanson (interposition silicone spacer)
- Pyrocarbon (surface/total jt replacement)
- Therapy- 2wk cast, 4wk short arc
Describe your operative management of MCP OA
ARTHRODESIS
- Salvage!!!! signifiicant disability from loss of ROM. For pain relief
- Fusion angle index 25’, long 30’. ring 35’, little 40’
- Types: hinge, fleible silicone prosthesis, surface replacement and pyrocarbon
Between which bones is the most common form of thumb OA
Trapezium and 1st MC base