treatment modalities in rheumatology · treatment modalities in rheumatology dr. christa visser ......
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Treatment Modalities in Rheumatology
Dr. Christa VisserMBChB MMed (Med Phys)
Diploma in Orthopaedic MedicineMember: Society of Orthopaedic Medicine, UK
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Biopsychosocial
vs Biomedical
Management
Rx
Rx
Emotional Environment
Rx
Rx
Physical Environment
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Management
• Multidisciplinary
• Education!!!!!!!!!!!
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• Temperature:–Cold:
»Reduced enzyme activity, decreased metabolic rate→ analgesia, muscle relaxation, vasoconstriction
–Heat »Superficial or deep (ultrasound) »Better perfusion, relaxation, analgesia
Physiotherapy
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• Electrical: TENS, Interference
• Physical: –Massage: myofascial pain, stress relief, pain
gating–Mobilization-manipulation–Ischaemic pressure–Dry needling
Physiotherapy
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Physiotherapy• Rest vs exercise: Acute inflammation:
– Rest (splinting) – ROM 1-2 X per day (active/passive)– Isometric exercise to maintain muscle bulk
• Exercise therapy: Subacute disease– Range of motion: maintain & improve– Muscle strength esp quadriceps (isometric,
isotonic, resisted)– Aerobic capacity: CHD risk, central analgesia eg
fibromyalgia• Hydrotherapy
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Occupational Therapy
• Aids and appliances: dressing, kitchen etc
• Splints: – night splints eg hands, knees – functional splints eg wrist extensionsplints
• Energy conservation• Joint protection• Hand joint exercises
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Orthotics
• Insoles: medial arch supports, metatarsal pads, medial/lateral wedges
• Heel inserts for plantar fasciitis• Knee/ankle braces: instability• Neck braces: Soft/Philadelphia• Corsets• Wrist splints• Mobility aids: sticks, crutches, frames, W/C
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Psychological support
• Depression very common– Loss of role– Loss of job– Financial problems (↓ income, ↑ medical expenses)– Poor sleep– Sexual problems
• Relaxation techniques• Psychological support• Relationship counselling
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• Relaxation techniques: – Breathing– Progressive relaxation
• Distraction techniques: – Mindfulness– Guided imagery– Meditation
• Coping skills-stressors, pain– Cognitive behavioural techniques– Psycho analysis– Hypnotherapy etc
• Relationship therapy
Psychological/social Intervention
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Social Work
• Psychological support • Family/relationship problems• Employment problems: liaise with employer• Disability grant / early pension / medical
boarding
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Dieticians
• Avoid obesity- stress on hips, knees, ankles• Fibre-prevent constipation due to medication• Inflammatory diseases
– Anti-oxidants: eg Vit C and E– Omega 3 fatty acids: eg fatty fish, fish oils– Essential fatty acids: evening primrose oil– Calcium-osteoporosis prophylaxis– Low cholesterol-prevent IHD– Fasting: RA improves!
• Gout: low purine diet
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Medical Treatment
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Analgesia
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Types of Pain• Nociceptive pain:
Tissue damage - trauma, inflammation
– Somatic (musculoskeletal): • local pain • referred pain• NB Myofascial pain syndromes
– Visceral structures: referred pain
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Types of Pain• Neuropathic pain:
Damage to peripheral nerves or CNS
– Stabbing, burning or shooting – Often poor response to opioids– Usually some sensory defect (usually
thermal)– Often autonomic instability– Allodynia to touch, cold and movement
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Analgesics
• Paracetamol• Cox inhibitors: Aspirin, NSAID’s, Coxibs• Opioids• Atypical analgesics
– Antidepressants– Anticonvulsants– Antiarrhythmics
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Pain Treatments under Investigation
• Cannabinoids• Ion channel blockers• Adrenergic agonists• Excitatory amino acid antagonists
(NMDA) • Neurokinin antagonists• Neurotrophin antagonists (eg nerve
growth factor)
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Pharmacologic Therapy
• Timing– Give ‘by the clock’: more stable blood
concentrations minimizes risk of break through pain
– Give according to T ½: frequent enough to maintain stable concentration
– ‘When needed’ : administration of each dose contingent on reappearance of pain
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Pharmacologic Therapy
• Dose– Too small: not effective – Excessively large: toxicity or side-effects
overwhelm beneficial pain relief
• Analgesic Type– Decrease generation of pain impulses at sites
of inflammation: anti-inflammatories– Suppress nervous system transmission of
pain impulses: opioids, atypical analgesics
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Hyperalgesia (inflammation)
Analgesia
Anti-inflammatories
Opioids
Intensity of stimulus
Pai
n pe
rcei
ved
Pain threshold
DOSE-RESPONSE CURVE FOR PAIN
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Arachidonic acid
PG E2 PG F2α TX A2 PG D2 PG I 2Gastroprotection Platelet aggregation Vasodilatation
Vasoconstriction
Cyclo-oxygenase (COX)
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Arachidonic acidCox 1
Constitutively expressed:Stomach, intestines,
platelets, kidney
PG E2 PG F2α TX A2 PG D2 PG I 2Gastroprotection Platelet aggregation Vasodilatation
Vasoconstriction
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Arachidonic acidCox 1
Constitutively expressed:Stomach, intestines,
platelets, kidney
Cox 2Constitutively expressed:
brain, kidneyInduced: sites of
inflammation
PG E2 PG F2α TX A2 PG D2 PG I 2Gastroprotection Platelet aggregation Vasodilatation
Vasoconstriction
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Arachidonic acidCox 1
Constitutively expressed:Stomach, intestines,
platelets, kidney
Cox 1 & 2 inhibition:• ↓ PG E2 in stomach →
parietal cell damage• ↓ TX A2 → bleeding• ↓ PG I 2 in kidney→↓ kidney
function and ↑ BP• ↓ inflammation
Cox 2Constitutively expressed:
brain, kidneyInduced: sites of
inflammation
PG E2 PG F2α TX A2 PG D2 PG I 2Gastroprotection Platelet aggregation Vasodilatation
Vasoconstriction
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Arachidonic acidCox 1
Constitutively expressed:Stomach, intestines,
platelets, kidney
Cox 1 & 2 inhibition:• ↓ PG E2 in stomach →
parietal cell damage• ↓ TX A2 → bleeding• ↓ PG I 2 in kidney→↓ kidney
function and ↑ BP• ↓ inflammation
Cox 2Constitutively expressed:
brain, kidneyInduced: sites of
inflammation
Cox 2 selective inhibition:• ↓ PG I 2 in kidney→↓ kidney
function and ↑ BP• ↓ inflammation
PG E2 PG F2α TX A2 PG D2 PG I 2Gastroprotection Platelet aggregation Vasodilatation
Vasoconstriction
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1. Paracetamol
• Action: Inhibits cyclo-oxygenase centrally– Analgesic– Antipyretic
• Rarely produces gastric irritation • No inhibition of platelet function• Can be given in combination with NSAID’s , coxibs or
aspirin• Inexpensive• Up to 4 g per day if normal LFT- liver toxicity in high
dose• Regular dosing to achieve steady state levels
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2. Anti-inflammatory Drugs
• Inhibit cyclo-oxygenase (COX)
– Centrally • Analgesic• Antipyretic
– Peripherally• Anti-inflammatory, especially at higher dosages• Secondary analgesic effects
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• Aspirin: – POTENT anti-inflammatory!!– Significant side effects esp gastric – Permanent inhibition for life of platelet
• Conventional NSAID’s– Gastric, renal/cardiovascular side effects– Reversible platelet inhibition– “Safer”: misoprostol, PPI (not H2 antagonists,
sucralfate)
• Cox 2 selective drugs– Less gastric side effects– Renal/cardiovascular effects similar to conventional
NSAID’s– No effect on platelet function
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Cox inhibitors
• Musculoskeletal pain
• Headaches
• Dysmenorrhoea
• Pre-emptive analgesia
• Post operative pain
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3. Opioids
• Most potent pain-relieving drugs • Most reliable drugs for rapidly relieving pain • Inhibit pain impulse transmission within CNS• Opioid receptors and effects
– Mu and Kappa: analgesia, sedation, respiratory depression and euphoria
– Delta and Sigma: dysphoria, hallucinations
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Opioids: Indications
• Severe acute pain– Large and frequent doses
• Chronic pain– Malignancy: use of opioids well accepted – Chronic non-malignant pain: careful - nociception not sole
source of suffering – Use only if
• Opioid sensitive pain• All other treatments have failed• Pain has major effect on quality of life of patient• Usually: medical confirmation of diagnosis • Full explanation and agreement of patient
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Relatively opioid-insensitivepain
• Neuropathic pain• Bone pain• Superficial ulcer pain• Bladder and rectal tenesmus• Perineal pain• Pancreatic pain• Isolated sharp pains (constant pain more
reliably relieved)
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Opioids: Contra-indications
• Raised ICP: CO2 retention leads to further raise in pressure
• Pulmonary disease eg COPD• Renal impairment: accumulation (codeine,
dihydrocodeine, Pethidine, morphine)• Gross liver function disturbance• Hypothyroidism• Other sedative drugs• (Previous substance abuse)
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Pharmacology of Opioids
• Opioids classified according to: – Potency: kind of pain relief
(mild/moderate/severe)– Receptor effect at mu and kappa receptors
Full agonist Partial agonist Antagonist
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Opioid Potency• Strong:
– Morphine, Diamorphine (Heroin), Methadone, Fentanyl
• Intermediate:– Meperidine (Pethidine), Pentazocine, Tramadol,
Tilidine, Dipipanone, Buprenorphine• Low:
– (Dextro)propoxyphene (0,66x), Codeine (1x), Dihydrocodeine (2x).
– Unacceptable side effects at high doses required to provide equivalent analgesia to high potency opioids: eg 200 mg codeine required to achieve the same effects as 30 mg morphine po
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4. Antidepressants• Analgesic effect of tricyclics
– Mechanism of analgesia is unknown – More rapid onset than antidepressant effects– Lower dose than antidepressant effects– Patients with chronic pain who are not depressed
also obtain pain relief with antidepressants – Potentiate opioid analgesia: useful adjuncts for
treatment of severe persistent pain eg malignant tumors
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Antidepressants
• Tricyclic antidepressants– Particular valueable in management of
neuropathic pain eg diabetic neuropathy, postherpetic neuralgia
– Significant side effects – Depression: adequate dosage for 2-4 weeks - lag
effect– Pain: lower doses – Dose: 10 to 25 mg nocte, increase weekly to
maximum 150 mg
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Antidepressants
• Serotonin-selective reuptake inhibitors: Fluoxetine (Prozac) – Fewer and less serious side effects– Not been shown to provide pain relief
• Venlafaxine (Efexor)– Nontricyclic antidepressant – Blocks serotonin and norepinephrine reuptake– Appears to be useful in patients who cannot tolerate
tricyclics
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5. Anticonvulsants
• Useful for– “stabbing pain”– “shooting pain”– “lancinating pain”– “electric shock like pain”
• Less likely to have an effect on constant burning pain
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Anticonvulsants• Carbamazepine
– Most commonly used– Start 100mg/day and increase gradually to 1600 mg
per day– Toxic symptoms: nausea, vomiting, and unsteady gait– Take with food
• Gabapentin (Neurontin) 600-1200 mg/d– Increases brain gamma-aminobutyric acid levels– Broad range of neuropathic pains
• Clonazepam (Rivotril) 1 mg qid
• Phenytoin (Epanutin) 300 mg per day
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6. Antiarrhythmic drugs
• Neuropathic pains
• Block spontaneous activity of damaged primary afferent nociceptors
• Drugs and doses (max)– Mexiletine (Mexitil)150-300 mg tds– ((IV Lignocaine))
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7. CNS Depressants:
• Sedative-hypnotics, tranquilizers, anxiolytics, muscle relaxants eg benzodiazepines, barbiturates
• If some ‘pain relief’: non-nociceptive factors at least partially responsible for suffering
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Sedative hypnotics• Mood elevation and dysinhibition briefly allay
suffering (like alcohol)• Physiologically beneficial sleep only for a few
weeks, then significant disturbance of REM sleep
• Cognitive defects similar to those of organic brain disease: months to recover
• Cause / aggravate depression• Effects on driving more subtle than alcohol - may
persist > 24 h after single dose• Tolerance and habituation
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Specific Disease Treatments
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Osteoarthritis
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OA: Glucosamine Sulphate• Effects
– Pain relief– Chondropotection (DMOAD) in knee OA
• After 3-5 y: slight ↑ in joint space, ↓ in placebo groups • Increase proteoglycan synthesis: building block of
glycosaminoglycans ( cartilage ground substance)
• Shrimp and crab shells• 1500 mg per day• Which one??
– Sulphate (not chloride)– No quality control regarding bioavailability of active
ingredient
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OA: Other DMOAD’s
• Chondroitin Sulphate– Studies not definitively conclusive– Bovine product- higher cost
• Diacerhein– Reduce OA symptoms– Decrease cartilage loss in hip compared to placebo– Not yet in SA
• Tetracycline: ongoing trials– Block synthesis of nitric oxide and metalloproteases
involved in cartilage destruction• Antimalarials: ongoing trials
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Gout
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Gout
• Colchicine– High dose in acute attack– Low dose as prophylaxis
• Urate lowering drugs: increase slowly until urate <0.3 mmol/l– Allopurinol– Probenecid
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Inflammatory Arthritis
Rheumatoid arthritisSpondylarthritis
Connective Tissue Diseases
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Corticosteroids
• Weight gain• Hypertension• Cataract• Diabetes mellitus• Arteriosclerosis• Osteoporosis (weight bearing exercise,
Calcium + vit D, HRT, bisphophonates)
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Corticosteroids
• Dramatic improvement in pain and stiffness
• Use (in lowest dose, shortest time possible):– Acutely ill– Ineffective response to optimal DMARD– Significant systemic disease– Serious social problems: breadwinner losing job
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Corticosteroids
• Intra-articular– Pain (Flare)– Sepsis: aseptic technique– Cartilage softening?? 3-6 month intervals
between injections
– Duration of effect varies ++
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RA: Rank Order DMARD’s
Strong4/5MethotrexateLeflunomide
4SulphasalazineGold IMD-penicillamine
3Chloroquine
2HydroxychloroquineMinocycline
Weak1Auranofin
PotencyRank OrderDrug Strength
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DMARD’s
• No single therapeutic regimen consistently halts disease progression
• Most cartilage loss in first 18 months of disease (irreversible): Early and aggressive treatment leads to better long term outcome
• RA: begin early with a therapy that will downgrade disease to a less destructive form of RA without causing undue morbidity from the therapy
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RA: Minocycline
• Trials contradictory but balance showed benefit
• Used in milder disease - no decrease in radiological progression
• 100 mg bd• Effect after 3-6 months
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Chloroquine
• Chloroquine base average dose 200mg/d
• Lower dose in older and smaller patients (eg 5 days per week)
• Irreversible maculopathy• 6-12 monthly Ophthalmology reviews
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Gold preparations• Allergic reactions• GIT: stomatitis, diarrhoea• Bone marrow suppression/eosinophilia• Renal: GN, nephrosis• Lungs: pneumonitis• Peripheral neuropathy
• Regular FBC and urine Dipstick • Not available in SA anymore
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D-Penicillamine
• Expensive• Side effects:
– Bone marrow suppression– Renal: nephrosis– Rash– Drug induced lupus
• Specialist use: vasculitis, lung disease, Felty
• Regular FBC and urine Dipstick
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Sulphasalazine
• GIT: Nausea, liver function disturbance• Dizziness, headaches• Bone marrow suppression• Impaired spermatogenesis
• Do regular FBC and LFT• 500-2000 mg per day in divided doses
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Methotrexate
• First line treatment• Safe use
– With folic acid every day– Once a week– 7.5-15 mg per week (higher with specialist
use)– Regular full blood count and liver function
test
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Methotrexate
• Nausea• Liver fibrosis• Bone marrow suppression• Pneumonitis• Increases size of RA nodules
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RA: Leflunomide (ARAVA)
• Pyrimidine synthesis inhibited – decreased T cell activation – decreased T cell proliferation
• Reduction – inflammation – radiologic erosions
• Dose: – Loading dose 100 mg per day for 3 days– 10-20 mg per day
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RA: Leflunomide
• Side effects (serious in 20%)– GIT: diarrhoea– Skin rash– Alopaecia– Raised liver enzymes– Bone marrow suppression– Severe teratogenicity– Cost!
• Pregnancy and lactation: contraindicated for 3 YEARS M+F
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RA: Biologicals
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Etanercept (Enbrel®)TNF-α receptor fusion protein
TNFα receptor
p75 TNFα receptor(Recombinant)
TNFα
Fc of IgG
IgG
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Infliximab (Revellex®)Dimeric (murine +human) anti-TNF-alpha antibody
TNF- α receptor
TNF- α
Dimeric IgGagainst TNF α
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Adalumimab (Humira ®)Humanised anti-TNF-alpha antibody
TNF- α receptor
TNF- α
IgGagainst TNF α
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AnakinraRecombinant human IL 1 receptor
antagonist
IL-1 receptor
IL-1
IL1 receptor antagonistAnakinra molecule
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Efficacy of biological treatment
0%
10%
20%
30%
40%
50%
60%
70%
80%
ACR20 ACR50
MTXaTNF+MTXI1ra+MTX
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Medical management: Disease modification
– Immunosuppressants in severe RA, CTD • High doses IV steroids• Azathioprine (Imuran)• Cyclosporine (Neoral)• Cyclophosphamide (Endoxan)• Chlorambucil• Mycophenolate Mofetil
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Immunosuppressants
• Severe disease especially if vasculitis or systemically unwell
• Could lower daily requirement of steroids
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Surgical Interventions
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Surgical Management
• Arthroscopy: knee, shoulder• Arthrodesis: wrist, ankle, IP• Excision arthroplasty: elbow, wrist• Arthroplasty: hip,knee, MCP’s• Synovectomy: knee• Tenosynovectomy:wrist, trigger finger• Osteotomy: OA
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Common surgical interventions
• Cervical spine: stabilization• Shoulder: decompression, replacement• Elbow: excision of radius head, replacement• Wrist: excision of ulna head, synovectomy,
arthrodesis, carpal tunnel release• MCP: synovectomy, Swanson prosthesis• Fingers: soft tissue release, Swanson’s,
arthrodesis
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Common surgical interventions
• Hip: replacement• Knee: synovectomy
(open/arthroscopic), replacement• Ankle: arthrodesis, replacement• Hind/midfoot: arthrodesis• Toes: excision of MT heads, soft tissue
release, arthrodesis
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Injection therapy
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Corticosteroids
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Indications for steroid injections
Any lesion with an inflammatory component
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Properties of Steroid drugs
Glucocorticoid Mineralocorticoid
Fludrocortisone 10 125
Cortisone 0.8 0.8
Hydrocortisone 1 1
Prednisolone 4 Potent 0.8
Methylpred 5 Potent 0.5
Triamcinolone 5 Potent 0
Betamethasone
Dexamethasone25 Very potent
25 Very potent
0
0
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Steroids used in soft tissue injectionsDuration Conc 1 ml ecq to pred (mg)
TC Ledercort 1-4 W 25 mg/ml 25mg Lederspan 3-4 W 20mg/ml 20 mg
MP Depo Medrol
½ D-4 W 40 mg/ml 40 mg 80 mg/ml 80 mg
BM Celestone Diprosone
3-4 D 4 mg/ml 21,3 mg
Celestone Soluspan
1-2 W 6 mg/ml 32 mg
DM Decadron 3 D-3 W 4 mg/ml 21.3 mg Oradexon 3 D-3 W 5 mg/ml 26.6 mg
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Solubility of Steroid Preparations
• Very soluble: Hydrocortisone• Moderately soluble: Betamethasone• Poorly soluble:
• Triamcinolone• Methylprednisone
• Soluble preparations soft tissue injections (less likely to provoke tissue damage)
• Poorly soluble steroids joint injections
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Systemic side effects
• *Skin flushing (>20 mg MP)• *Menstrual irregularity (>40 mg MP)• Muscle wasting and myopathy• Impaired glucose tolerance• Osteoporosis• Psychological upset• Steroid arthropathy• Adrenal suppression• Immunosuppression
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Local Side Effects
• Post injection flare:• Infection: Increased pain& local signs, febrile and ill
• Subcutaneous atrophy: Too large dose/ volume, too frequent injection, subcutaneous injection
• Skin depigmentation: Too large dose/ volume, too frequent injection, subcutaneous injection
• Tendon rupture: Too large dose/ volume, too frequent injection, bolus injection
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Local Anaesthetics
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Indications for use of Local Anaesthetics
• Aid to diagnosis• Diminish pain (mix with steroid)
– Solubility: BM>MP• Provide volume for injection of steroids
(large joints, bursae)
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Local anaestheticcharacteristics
Time to onset
Duration
Lignocaine 1-2 min 1 h
Bupivacaine < 30 min < 8h
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Local effects of local anaesthetics
Loss of pain
Loss of allsensation
Loss ofmotor power
Increasing dose of local anaesthetic
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Safe doses of local anaesthetics
Concentration Max volume
Lignocaine (200 mg)
1% 2%
20 ml 10 ml
Bupivacaine(150 mg)
0,5%
30 ml
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Side effects of local anaesthetics
• Allergic reactions (observe for 30 min)
• Toxic reactions (Overdose/IVI)– CNS: peri-oral paresthaesiae, agitation,
convulsions, coma, respiratory arrest– CVS: cardiovascular collapse
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OA: Hyaluronan injections
• Made from rooster comb• Supplement the reduced endogenous
hyaluronan in joint• Efficacy due to effects on synovial cytokines• No definite long term efficacy in trials, but
some patients get symptomatic relief lasting months
• Use in patients who require, but do not want, surgery and who failed to respond to corticosteroid injection
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Summary
• Multidisciplinary approach
• Rational use of medical, surgical and allied health interventions