carpal tunnel syndrome - fisiokinesiterapia · some pregnant women to develop carpal tunnel...
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Carpal Tunnel Syndrome
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Objectives
How to evaluate the patient clinicallyHow to treat the patient effectivelyWhen to treat surgically
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Plan
DefinitionEpidemiologyEtiologyClinical FeaturesPhysical examinationDiagnosticDifferential DiagnosticsTreatment
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Definition
Carpal tunnel syndrome, the most common focal peripheral neuropathy, results from compression of the median nerve at the wrist.
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epidemiology
Affects an estimated 3 percent of adult AmericansThree times more common in women than in menHigh prevalence rates have been reported in persons who perform certain repetitive wrist motions (frequent computer users)• 30% hand paresthesias• 10% clinical criteria for carpal tunnel syndrome• 3.5% abnormal nerve conduction studies
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Clinical Features
PainNumbnessTinglingSymptoms are usually worse at night and can awaken patients from sleep.To relieve the symptoms, patients often “flick” their wrist as if shaking down a thermometer (flick sign).
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Clinical Features
Pain and paresthesias may radiate to the forearm, elbow, and shoulder.Decreased grip strength may result in loss of dexterity, and thenar muscle atrophy may develop if the syndrome is severe.
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Atrophy
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Physical examination
Phalen’s maneuverTinel’s signweak thumb abduction.two-point discrimination
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Phalen’s maneuver
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Tinel’s sign
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Diagnostic
HistoryPhysical examinationNerve Conduction Study
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Differential Diagnostics
TendonitisTenosynovitisDiabetic neuropathyKienbock's diseaseCompression of the Median nerve at the elbow
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Treatment
CONSERVATIVE TREATMENTS– GENERAL MEASURES– WRIST SPLINTS– ORAL MEDICATIONS– LOCAL INJECTION– ULTRASOUND THERAPY– Predicting the Outcome of Conservative
TreatmentSURGERY
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GENERAL MEASURES
Avoid repetitive wrist and hand motions that may exacerbate symptoms or make symptom relief difficult to achieve.Not use vibratory toolsErgonomic measures to relieve symptoms depending on the motion that needs to be minimized
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WRIST SPLINTS
Probably most effective when it is applied within three months of the onset of symptomsOptimal splinting regimen ?
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WRIST SPLINTS
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ORAL MEDICATIONS
DiureticsNonsteroidal anti-inflammatory drugs (NSAIDs)pyridoxine (vitamin B6)Orally administered corticosteroids– Prednisolone– 20 mg per day for two weeks– followed by 10 mg per day for two weeks
DO NOT WORK !!!
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LOCAL INJECTION
A mixture of 10 to 20 mg of lidocaine(Xylocaine) without epinephrine and 20 to 40 mg of methylprednisolone acetate (Depo-Medrol) or similar corticosteroid preparation is injected with a 25-gauge needle at the distal wrist crease (or 1 cm proximal to it).
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LOCAL INJECTION
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LOCAL INJECTION
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LOCAL INJECTION
Splinting is generally recommended after local corticosteroid injection.If the first injection is successful, a repeat injection can be considered after a few monthsSurgery should be considered if a patient needs more than two injections
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ULTRASOUND THERAPY
•May be beneficial in thelong term management
•More studies are neededto confirm it’s usefulness
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SURGERY
Should be considered in patients with symptoms that do not respond to conservative measures and in patients with severe nerve entrapment as evidenced by nerve conduction studies,thenar atrophy, or motor weakness. It is important to note that surgery may be effective even if a patient has normal nerve conduction studies
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SURGERY
Complications of surgeryInjury to the palmar cutaneous or recurrent motor branch of the median nerveHypertrophic scarringlaceration of the superficial palmar archtendon adhesionPostoperative infectionHematomaarterial injurystiffness
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SURGERY
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PREGNANCYAlterations in fluid balance may predispose some pregnant women to develop carpal tunnel syndrome. Symptoms are typically bilateral and first noted during the third trimester. Conservative measures are appropriate, because symptoms resolve after delivery in most women with pregnancy-related carpal tunnel syndrome.
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Conclusion
Most common focal peripheral neuropathyPain and paresthesias in the distribution of the median nerve are the classic symptoms.While Tinel’s sign and a positive Phalen’smaneuver are classic clinical signs of the syndrome, hypalgesia and weak thumb abduction are more predictive of abnormal nerve conduction studies.
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Conclusion
Conservative treatment options include splinting the wrist in a neutral position and ultrasound therapyOrally administered corticosteroids can be effective for short-term management (two to four weeks), but local corticosteroid injections may improve symptoms for a longer period.If symptoms are refractory to conservative measures or if nerve conduction studies show severe entrapment, open or endoscopic carpal tunnel release may be necessary.