assessment and treatment of nerve entrapments of the upper ... · tendon transfer restoration of...
TRANSCRIPT
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Assessment and Treatment of Nerve Entrapments of the Upper Extremity: Beyond Carpal Tunnel
LAURA CONWAY OTR/L, CHT, COMT [email protected]
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Laura Conway MSOTR/L, CHT, COMT UEHand Therapy Coordinator-Gulf Coast/ Fieldwork coordinatorSelect Live facultyCenter Manager Select Physical/Hand Therapy, Brandon, Florida, USAI have no financial relationships to disclose within the past 12 months relevant to my presentation.
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Nerve Entrapments
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Nerves
Like to move Like to breatheDon’t like to
stretchDon’t like
pressure
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Brief Review of Nerve Anatomy & Physiology
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Protective and Connective Anatomy
Endoneurium PerineuriumEpineuriumMesoneurium
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Endoneurium
Separates individual axons
Highly elastic
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Perineurium
Surrounds fascicles Contributes most to
nerve’s tensile strength
Collagen based
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Epineurium-Internal
Adipose
Loose connective tissue
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Epineurium- Sheath
Collagen base
Absorbs stress
Thicker around joints
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Mesoneurium
Loose connective tissue
Facilitates gliding
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Nerve Entrapment
Nerve passes through several tight anatomic compartments along nerve bed
Conflict between free space and contents
Diminished compartment space
Increased volume of contents
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Result
Restricted gliding between tissues in the compartment
Interrupted nerve physiology
Impaired blood supply
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Axonal Transport
Uninterrupted axonal transport is necessary for neuron health
Activity affects intra-cellular motility
Inflammation disrupts axonal transport
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Nerve’s Response to Injury
Mild focal compression
Injury to Schwann cell
Demyelination results
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More Severe Trauma
Degeneration of the distal axon
Reactive changes to the nerve cell body
Wallerian degeneration
Potential for axonal death
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Seddon’s Classification
Published in 1943 3 stages of injury Useful in predicting
outcome and formulating treatment
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Neuropraxia
Segmental reduction or block of conduction
Axonal continuity preserved
No walleriandegeneration
Nerve conduction preserved distal and proximal to the lesion
Full recovery
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Axonotmesis
Axonal damage with preservation of endoneurium
Distal walleriandegeneration occurs
Endoneurial tubes guide re-growth of axon
Crush, fracture, chronic compression
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Neurotmesis
Most severe of nerve injuries
Connective tissue components of nerve damaged or transected
Recovery cannot occur through axonal regeneration alone
Surgical intervention required
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Injury Without Axonal Degeneration
The nerve to the nerve
Consists of C and Aδ fibers
Protective and pro‐inflammatory function
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Mechanism of Occurrence
Inflammation in and around the nerve (Dilley et al, 2005; Bove, 2009)
Interruption of axonal transport ( y Dille & Bove, 2008, Dilley et al, 2013)
Mechanical stress of stretch and/or compression
Neuropraxia
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Median Nerve Entrapment
CTS- Thenar atrophy, parastesia
Biceps aponeurosis- pronator weakness
Pronator teres- sensory, pain volar forearm, parastesia PCB median n
FDS arch
Michael J. Lee, DPT1 Paul C. LaStayo, PT, PhD, CHT Pronator Syndrome and Other Nerve Compressions That Mimic Carpal Tunnel Syndrome.J of Ortho & Sports Phys Ther. 2004;34:601-609
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Median N Innervation: Thenar
Opponens pollicis-opposes thumb, medially rotated and flexes metacarpal-Median N
Abductor pollicis brevis-Abducts the thumb-Median N
Flexor pollicis brevis-Flexes MCP- superficial median N, Deep ulnar nerve
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Function
Gives humanity an opposable thumb
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Median Nerve Forearm
Pronator teres
FDS, FDP
FPL
Power
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Assessment
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Ligament of Struthers
Supracondylar process syndrome
Abduct the shoulder
Position the elbow in flexion between 120-135 degrees
Resist elbow flexion 60 seconds
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Lacertus Fibrosis
Incoordination
Loss of tip to tip and lateral pinch strength
FPL, FDP II, FCR weakness
Not usually numb
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Lacertus Fibrosis
Place the patient in full active or passive pronation
Resist flexion
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Pronator Syndrome
Forearm ache
Tenderness over pronator teres
Weakness
Numbness and pain in daytime not night
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Pronator Syndrome
Place the forearm in a supinated position
Resist pronation of the forearm in a supinated position, held for 60 second
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FDS Arch
Resist middle finger flexion with the resistance placed over the middle phalanx
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Anterior Interosseous Nerve-
Flexor Pollicus Longus Pronator Quardatus Flexor Digitorum
Profundus I impairment
Trauma Inflammatory neuritis
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CTS• Motor loss is primarily of the thenar musculature and Lumbricals I& II• Not painful
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Carpal Compression Test/Durkan’s Sign
Compress the carpal tunnel for 30 seconds.
Pain and parasthesia are positive for carpal tunnel syndrome.
Specificity 91% Sensitivity 89%
Durkan JA; A new diagnistic test for CTS. J Bone and Joint Surgery 73:535-538, 1991
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EMGCortisone shot
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Its All About the Pressure
Average tissue fluid pressure in subject with CTS is 32 mm HG vs. 2.5 mm HG in the normal individual
When increased to 50-60 mm HG complete motor and sensory block occurs
Gripping and wrist position further increase pressure Many people sleep in extreme postures
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Dynamic Ischemia
At night lack of muscular contraction effects redistribution of fluid May explain negative EMG findings Maybe dynamic ischemia rather than structural injury
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Lumbrical incursion
Lumbrical muscles arise from FDP as they cross the palm, share the carpal canal Incursion occurs with gripping, composite fist Pressure begins to increase at 50% of a composite fist Size and shape of muscles influence significance of phenomenon
Source: Rehabilitation of the Hand and Upper extremity
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Intervention
Behavioral modificationOrthosisNeural mobilizationSurgery-CTROpponensplasty
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Behavioral modification
• Ergonomics• Tool handle size• Night splinting• NSAIDS
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Neural Mobilization
Y.H. Lim et al. Median nerve mobilization techniques in the treatment of carpal tunnel syndrome: A systematic review Journal of Hand Therapy 30 (2017) 397e406
Inconclusive
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Butler M et al. Reliability and accuracy of the brachial plexus neurodynamic test. M.W. Butler et al. / Journal of Hand Therapy (2018) 1-5
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Mohamed FI, Hassan AA, Abdel-Magied RA, Wageh RN. Manual therapy intervention in the treatment of patients with carpal tunnel syndrome: median nerve mobilization versus medical treatment. Egypt Rheumatol Rehabil 2016;43:27-34
Found improvement in subjective function, parastesia and pain
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Treatment: Nerve glides
Manual technique
Glide to feeling of tension
Note position
Slowly progress to uncomfortable
Move between positions
8-10x
Retest
Procedure is the same with all glides
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Median Nerve Glide
0/5 Shoulder IR, elbow 90, wrist and fingers neutral
1/5 Depress shoulder 1”, SH ER to neutral, ABD 45
2/5 SH ER to 90
3/5 Elbow extension
4/5 Forearm supinated
5/5 Extend wrist, radially abduct thumb
*Different than ULTT
*Standing at patients head
Butler M et al. Reliability and accuracy of the brachial plexus neurodynamic test. M.W. Butler et al. Journal of Hand Therapy (2018) 1-5
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Glide don’t stretch
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Self mobilization
Flossing
Not painful
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Surgical Intervention
Open procedure Mean 24% increase in space Preferred due to high degree of structural variability
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Endoscopic Procedure Faster return to pinchingand griping Faster return to work Higher rates of incomplete release,median nerve injury,Ulnar neurovascular bundle injury
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Complications
Infection Pillar pain Worsening of condition Incomplete sensory or motor return Flexor tendon laceration Wound dehiscence***BE CAUTIOUS OF EARLY SUTURE REMOVAL*** Trigger fingers Perineural scarring CRPS Palmaris Longus inflammation
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70-75% of surgeries result in some improvement Full restoration in less then 50-60% 7-15% will have worse symptoms after release due to scar formation
and tunnel narrowing
Chart from BLS
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Why Didn’t it Work?
Incomplete release Incorrect diagnosis Intra-neural scarring Adherence to the median nerve with traction dysthesia’s Re-growth of the flexor retinaculum Nerve subluxation
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High median nerve lesions
Index has no lumbrical or long flexors Interossei and EDC intact “Pointing finger deformity” Long finger also deprived but Quadriga phenomenon compensates
with FDP connection
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Opponensplasty
Resume opposition and power
Palmaris longus
FDS ring
EIP
ADQ-Huber-congenital
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EIP to opponens
Better in more flexible hands
Better line of pull and excursion vs. FDS
Lower morbidity
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Ulnar Nerve entrapment
Cubital Tunnel
Guyon’sCanal
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Hypothenar Musculature
Deep branch of the Ulnar N. ADM-SF abduction ODM- flex and laterally
rotate 5th MC FDM- aids in MCP flexion ADM-acts similar to 1st dorsal
interosseous, vital to extended large object grasp pattern, can aid in PIP extension. OM allows SF to reach the thumb
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Function
Cascade
Power grip
Grasping large objects
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Presentation
Claw deformity/ benediction hand
3rd and 4th lumbrical incompetence
Interosseous incompetence
Flattened palmar arch EDC extends the 4th and
5th digit unopposed Lessened in high lesions
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Digital Extensor Mechanism
Extrinsic extensors Intrinsic extensors Retinacular system
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Bouvier's Test
Determines if PIP joint capsule & extensor mechanism are working
Blocking MCP joint hyperextension allows IP joint extension
Indication for surgery/relative motion/ anticlaw orthosis
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Intrinsic Function
MCP flexion / stabilization
Extension of the interphalangeal (IP) joints.
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Cubital Tunnel
Between the two heads of FCU/aponeurosis (most common site)
Arcade of Struthers (hiatus in medial intermuscular septum)
Osborne's ligament and MCL
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Cause
Repetitive trauma External traction/compression-Hand therapists Fractures and medial epicondyle nonunion Osteophytes Heterotopic ossification Tumors and ganglion cysts
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Guyon’s canal
Location Common Causes of CompressionSymptoms
Zone 1
Proximal to bifurcation of the nerve
Ganglia and hook of hamate
fractures
Mixed motor and sensory
Zone 2 Surrounds deep motor branch Ganglia and hook of hamate
fractures
Motor only
Zone 3 Surrounds superficial sensory branch Ulnar artery thrombosis or
aneurysm
Sensory only
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Cause
Ganglion cyst (80% of nontraumatic causes) Lipoma Repetitive trauma-cyclists Ulnar artery thrombosis or aneurysm Hook of hamate fracture or nonunion Pisiform dislocation Inflammatory arthritis Fibrous band, muscle or bony anomaly Congenital bands Palmaris brevis Idiopathic
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Wartenburg’s Sign
Inability to adduct SF following abduction
11% sensitive, 95% specific
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Guyon’s Canal Compression Test
Compress 1 min medial of the pisiform.
Indicates ulnar nerve pathology at Guyon’s canal.
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Egawa’s Sign
Flex middle digit.
Radially and ulnarly deviate.
Demonstrates interosseous function.
Inability indicates ulnar nerve pathology.
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Froments and Jeanne’s signs
• Patient pinches paper in an attempt to keep the tester from pulling it away.
• IP flexion indicates ADD pollicus incompetence.
• If the MCP hyperextends it is Jeanne’s sign.
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Treatment
Activity modification Night orthosis Handle bar
modification Headset Padding Release/transposition
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High Ulnar Nerve compression Splinting
Elbow flexed 30- 45 degrees
Wrist is positioned in neutral to 20 degrees of ext, if included
Including the wrist decreases the effects from flexor carpi ulnaris contraction
Pilo splint can be a comfortable alternative
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Ulnar Nerve Glide
0/5 SH IR, elbow 90, arm across stomach, wrist and fingers neutral
1/5 SH ER to neutral, SH ABD 45, block SH elevation
2/5 ER 903/5 ABD 110,stabalize SH to prevent hiking4/5 Pronate, extend wrist, ring, small5/5 Flex elbow
Stand below shoulder
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Anticlaw Orthosis
Ring and little finger in 30- 45 flex
Maintains MCP collateral ligament length
This splint aids functional grasp
Prevents PIP contracture
Aquaplast tubes
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Tendon Transfer
Restoration of small and ring finger DIP flexion
Restoration of key pinchCorrection of clawing Integration of MCPJ and IPJ flexion Improvement in grip strength.
Sammer et al. Tendon Transfers Part II: Transfers for Ulnar Nerve Palsy and Median Nerve PalsyPlastic and Reconstructive Surgery. 124(3):212e-221e, SEP 2009.
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Key pinch
Key pinch-ECRB or brachioradialis
Adductor pollicis not usually needed to functional key pinch
Index finger can be stabilized against the adjacent fingers during pinch
Only in high fine motor demand individuals
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Claw deformity correction-options
1. MCPJ capsulodesis-static correction like orthosis
2. Static tenodesis with a tendon graft
3. Dynamic tenodesis-dorsal tendon graft tied to lateral bands
*Wrist flexion generates mcp flexion and IP extension
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Dynamic tendon transfers
Superficialis transfers Middle finger superficialis
tendon is divided Passed along the path of
the lumbrical, volar to the deep transverse metacarpal ligament, and back into the finger, where it is inserted on the lateral band
PIPJ hyperextension
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Therapists management
Week 1-4: Orthosis to maintain non-contractile tissue in optimal position. PROM. Scar Management
Week 4-6: Gentle A/PROM, explicit motor imaging, NMES Week 4: Focus on transfer training, biofeedback Week 8: Strengthening, orthosis is weaned Week 12: resume normal activity
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Factors influencing the timeline/ treatment
Strength of transfer/graft Health of the patient Synergy of the graft/transfer Cognitive status/ motivation Communication Power of the donor
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Interosseous plus
Paradoxical PIP extension Interosseous dominance overwhelms Long flexors are weak or poorly activated High median nerve Maladaptive motor pattern Isolate long flexors to retrain
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Radial Nerve
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Radial Nerve Palsy
Absent supination Absent wrist extension Absent digital extension Absent thumb extension and radial abduction “Saturday Night Palsy”
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Causes
Trauma Lead poisoning Humoral fracture Dislocation Repetitive motion
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Orthosis
Benik
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Therapy
NMES Tapping Vibration Gravity eliminated Place and hold Eccentric Taping
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Arcade of Froshe
SupinatorLeash of Henry
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Radial Tunnel vs PIN
Radial Tunnel
Pain-dull Fatigue May radiate No weakness
PIN Purely motor Weak wrist extension into radial
deviation-ECRL intact Absent digital extension
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Rule of Nine
Red indicates radial nerve
Yellow median nerve
Blue control
Arch Bone Jt Surg. 2015 Jul;3(3):156-162
Left Forearm just distal of crease
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ECRB entrapment
Resist middle finger extension
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Supinator Syndrome
Place the forearm in a pronated position
Resist supination
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Treatment
Patient education-link posture to recovery Ergonomics HEP Stretching Proximal strengthening Nsaids Soft tissue Neural mobilization Diaphragmic breathing Examine sleeping position
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HEP
Postural correction Proximal glides
Postural correction with “D” posterior rolls
Nerve glides Scapular clock
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Maximize space along nerve bed Maximize nerve bed length Minimize sustained adverse tension on neural tissue
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Radial Nerve Glide
1. Stand at patients head, shoulder just off the table, SH IR, elbow 90,wrist and fingers neutral
2. Depress SH 1”, SH ER neutral, SH ABD 45
3. SH IR, elbow 90
4. Elbow extension, forearm neutral, wrist and fingers neutral, SH IR
5. Pronate forearm
6. Wrist and finger flexion, ulnar deviation
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Cervical Radiculopathy
Spurling’s A test ULTT A test Cervical distraction Cervical rotation <60 degrees to the affected side
Wainner RS, Irrgang JJ, Boninger ML, Delitto A, Allison S. Reliability and diagnostic accuracy of the clinical examination and patientself-report measures for cervical radiculopathy. Spine 2003;28(1):52-62.
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Spurlings test
The examiner turns the patient's head to the affected side while extending and applying downward pressure to the top of the patient's head
Gradual build up and release
7 seconds
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ULTT
0/5 Shoulder IR, elbow 90, arm across stomach, wrist and fingers neutral1/5 Shoulder ER to neutral, elbow at 90, wrist and fingers neutral2/5 Shoulder ABD 100, elbow 90, neutral rotation, wrist and fingers neutral, thumb in radial abduction3/5 Shoulder in ABD 100 ER 90, elbow at 90, forearm in supination, fingers neutral, thumb radial abduction4/5 Shoulder in ABD 100 ER 90, elbow at 10, forearm in supination, fingers neutral, thumb radial abduction5/5 Shoulder ABD 100 ER 90, elbow 0, forearm supination, wrist extension, fingers neutral, thumb radial abduction
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Do not depress the shoulder Do not drop the shoulder into extension Change grip at 45 degrees of ABD Watch for the eyebrow sign
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Questions??????
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References
Bove GM, Focal nerve inflammation induces neuronal signs consistent with symptoms of complex regional pain syndromes. Exp Neurol. 2009;219(1):223‐7.
Bove GM, Ransil BJ, Lin HG, Leem JG. Inflammation induces ectopic mechanical sensitivity in axons of nociceptors innervating deep tissues. J Neurophyisol. 2003;90:1949‐55. 3.
Butler MB, Common shoulder diagnoses. In Cooper C, editor: Fundamentals of hand therapy 2nd of hand therapy 2 ed St Louis Mosby Elsevier 2014 nd ed., St. Louis, Mosby Elsevier, 2014.
Butler DS, The Sensitive Nervous System. Noigroup Publications, Adelaide, Australia, 2000.
Coppeiters MW, Hough AD, Dilley A. Different nerve‐gliding exercises induce different magnitudes of median nerve longitudinal excursion: an in vivo study using dynamic ultrasound imaging. J Orthop Sports Phys Ther 2009;39(3):164‐171.
Dilley A, Bove GM. Disruption of Axoplasmic transport induces mechanical sensitivity in intact rat C‐fibre nociceptor axons. J Physio. 2008;586(2):593‐ 604.
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Dilley A, Lynn B, Pang SJ. Pressure and stretch mechanosensitivity of peripheral nerve fibres following local inflammation of the nerve trunk. Pain 2005;117:462‐472.
Dilley A, Richards N, Pulman KG, Bove GM. Disruption of fast axonal transport in the rat induces behavioral changes consistent with neuropathic pain. J Pain 2013;14(11):1437‐49.
Elvey R, Physical evaluation of the peripheral nervous system in disorders of pain and dysfunction, J Hand Ther 10:122, 1997.
Greening J. Clinical implications for clinicians treating patients with non‐ specific arm p , ain whiplash and carpal tunnel syndrome. Man Ther. 2006;11:171‐2.