brachial plexus - alpha hand surgery centre plexus formed by ventral ... upper plexus c5 c6 –...
TRANSCRIPT
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+Brachial plexus
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Brachial Plexus
■ Formed by ventral rami of spinal nerves C5-T1
■ Five ventral rami form ■ three trunks that separate into ■ six divisions that then form ■ cords that give rise to nerves
■ Major nerves ■ Axillary
■ Radial ■ Musculocutaneous ■ Ulnar
■ Median
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M shape formed by
1. Musculocutaneous N.
2. Median Nerve
3. Ulnar N.1
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ERB’S PARALYSIS
• Erb’s point
• Causes Downward traction
• Nerve roots involved
• Muscles Paralysed
• Deformity
• Disability •deltoid –supraspinatus–infraspinatus–biceps -brachialis
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LEFT SIDE PARALYSIS
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Klumpke’s paralysis-
Site of injury
Cause of injury
Nerve roots involved
Muscles paralysed
Deformity
Disability
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CLAW HAND HORNER SYNDROME
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+Brachial Plexus Injury: Adults
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+Injury Classification
Millesi classification*
■ Supraganglionic
■ Infraganglionic
■ Trunk
■ Cord
Anatomical Classification
■ C5-6 waiters tip (Erbs palsy)
■ C5-7 as above, elbow slightly flexed
■ C5-T1 flail limb, claw hand, vasomotor changes, +/- Horners syndrome
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+Preganglionic Injury
■ Nerve root avulsion ■ dorsal & ventral rootlets
■ invested by pia mater / dural funnel
■ etiology: traction (occasionally missile, knife) ■ Significant traction causes dural rupture / root vulnerability
■ ventral > dorsal root (esp C8-T1) at higher risk
■ POOR Prognosis!
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+Grades of Injury■ Grade 1 – Neuropraxia
■ Disruption in nerve function that produces numbness and tingling ■ Most common grade within athletics ■ Symptoms usually resolve within several minutes
■ Grade 2 – Axonotmesis ■ Damage to the nerve’s axon ■ Symptoms = numbness, tingling, and affected function (may last several days) ■ Long nerves have a greater healing time than short nerves ■ Rare within athletics ■ Motor march, Tinel sign
■ Grade 3 – Neurotmesis ■ Permanent nerve damage occurs ■ Very rare within athletics ■ “Occurs with high-energy trauma, fractures, and penetrating injuries”
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+Adult Brachial Plexus Injury
How do you Rx the patient knocked off his motorcycle with clavicle # and flail arm?
■ Manage acute injury according to ATLS principles; look for concomitant injury ie c-spine.
■ History ■ Age, hand dominant, occupation, special skills ■ Cause of injury: arm hyperabducted vs neck laterally
flexed ■ Immediate or delayed arm weakness ■ Concomitant injury ■ General health: PMH, DH, Smoker
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+Aim of examination
■ Determine extent of injury
(Name by root value)
■ Determine level/ proximity of injury
■ Donors
▪ Nerve donors
■ Nerve source of neurotisation/ grafts
◆ Muscle donors
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Clinical Examination General Observe how patient removes his shirt Altitude of UL – normally flail, IR, adducted Wasted UL with dry skin ? Scars/ bruises (Neck) ? Horner Syndrome
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Inspection of UL Comment on muscle bulk (behind -> front) & (proximal -> distal) Deltoid (also ? sulcus sign; ? reducible) Supra/ Infraspinatusko Biceps/ Triceps Forearm Hand (Intrinsics) ? clawing
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Palpation SCJ -> clavicle -> ACJ -> Shoulder -> spine of scapula Over whole UL ?deformity/ mi Tinel’s sign over supraclavicular area Suggestive of post ganglionic lesion Quick screening for joint stiffness (passive ROM)
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Move Back -> front; Proximal -> distal ? pre or post ganglionic lesion Trapezius (spinal accessory n) – shrug shoulder Rhomboids (dorsal scapular n) – shoulder retraction (may have contribution from C4) Serratus anterior (long thoracic n) – winging of scapular Shoulder Abduction (Supraspinatus -> Suprascapular n ; Deltoid -> axillary n) Flexion/ Abd/ Ext ( Deltoid – anterior, middle & posterior fibers) Elbow Flexion (Biceps -> musculocutaneous n) Extension (Triceps -> radial n) Remember to eliminate gravity
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Wrist Extension Flexion Hand/ Fingers Abduction Adduction Flexion Extension
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Sensation According to dermatomes Pain or light touch Pulses Radial pulse (compare to normal side) Others Chest percussion (Phrenic n) Any scar for previous chest tube (Intercostal n) Lat dorsi ms (cough, feel for contraction) Pectoralis ms (Shoulder adduction and extension) Sural n (? Scar or sensation over lateral aspect of dorsum foot)
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Upper plexus C5 C6 – unable to Abduct shoulder (deltoid/ supraspinatus) ER shoulder (infraspinatus/ teres minor) Flex elbow (biceps/ brachialis/ brachioradialis) Supinate forearm (supinator) Sensory deficit over deltoid, lateral aspect of forearm & hand Upper plexus C5 C6 C7 – Same as C5 C6 palsy + Unable to extend elbow +/- wrist Lower plexus C8/T1 Weak intrinsic of hand Paralysis of wrist & fingers flexors Claw hand deformity Sensory deficit over medial aspect of arm, forearm & hand Complete BPI With or without recovery
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Pre ganglionic lesion Upper proximal Paralysis of rhomboids (dorsal scapular n), serratus anterior (long thoracic n) & diaphragm (phrenic n) Lower proximal Horner Syndrome (lower plexus root avulsion, damage of stellate ganglion at level of T1)
Tinel’s sign Over supraclavicular region Indicates nerve regeneration Suggestive of Post ganglionic lesion
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Intraplexus Median n & Ulnar n – only in upper plexus injury Extraplexus Spinal accessory n (trapezius) Intercostal n Contralateral C7 (sensation over tip of middle finger) Phrenic n (chest percussion) Sural n (sensation over lateral aspect of foot) – as a cable graft Trapezius (spinal accessory n) Pect major (med & lat pectoral n) Lat dorsi (long thoracic n) Triceps (radial n)
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+Neurological Examination
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+Neurological Examination
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DERMATOMES OF UPPER LIMB
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+Examine the Back
Wall test for serratus ant (winging scapula)
Note weak trapezius (asymmetric shrug)
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+Investigations
Imaging: Xray: AP chest (look for teeth and fractures ), AP + lat views shoulder, C-Spine (AP, lat, odontoid peg), Fine-cut CT,
MRI
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+Investigations
■ Lung function test
■ CT angio (if indicated)
■ Nerve conduction test and EMG
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+Management
■ Early treatment ■ physio: maintain supple joints with FROM ■ Brace / splinting ■ Pain control
■ Surgical options: ■ nerve transfers ■ nerve grafting ■ muscle transfers ■ free muscle transfers ■ neurolysis of scar in incomplete lesions ■ Arthrodesis to stabilise joints
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+How to manage a BPI victim
■ Open wounds ■ Sharp injury ■ Bullet injury
■ Closed injuries
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+Sharp injury
Chest tube
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+
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+
■ Bullet wound
Clavicle osteotomy
Junction of trunk and cords
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+
Nerve repair and graft
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Laceration
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Nerve graft
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+
■ Closed injury, (tractional injuries)
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+
■ Closed injury, (tractional injuries)
■ Early exploration ■ Underobservation ■ Decision for the time of delay exploration ■ Decision for the type of the treatment
■ Late reconstruction
Straigh
t on B
rachia
l plex
us
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+
■ Closed injury, (tractional injuries)
■ Early exploration ■ Underobservation ■ Decision for the time of delay exploration ■ Decision for the type of the treatment
■ Late reconstruction Peripheral reconstruction
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+
■ Closed injury, (tractional injuries)
■ Early exploration ■ Underobservation
First 3 months Stabilization of the patient Stabilization of the injury Evaluation of the improvement
After 3 months No improvement: surgery Progressive improve; wait & watch
Based on severity
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+
■ Closed injury, (tractional injuries)
■ Early exploration ■ Under observation ■ Decision for the time of delay exploration ■ No recovery
■ After 3 months (based on the severity of the trauma) ■ Progressive improvement
■ Wait for further improvement ■ Non-anatomic recovery
■ Exploration before 9-12 months
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+
■ Closed injury, (tractional injuries)
■ Early exploration ■ Under observation ■ Decision for the time of delay exploration ■ Decision for the type of the treatment
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+Treatment options’ indication
■ Neurolysis
■ Nerve graft
■ Nerve transfer
■ Tendon transfer
■ Arthrodesis
■ Functional muscle flaps
Straight on Brachial Plexus
Early exploration Delay exploration
Peripheral reconstruction
Late reconstruction Danger of more damage Failure is obvious
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+
■ Gun shot injury
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+
After neurolysis from scar tissue
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+Treatment options’ indication
■ Neurolysis
■ Nerve repair…
■ Nerve graft
■ Nerve transfer
■ Tendon transfer
■ Arthrodesis
■ Functional muscle flaps
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+Treatment options’ indication
■ Neurolysis
■ Nerve repair
■ Nerve graft eg sural nerve
■ Nerve transfer
■ Tendon transfer
■ Arthrodesis
■ Functional muscle flaps
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+
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+
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+Treatment options’ indication
■ Neurolysis
■ Nerve repair
■ Nerve graft
■ Nerve transfer..neurotization
■ Tendon transfer
■ Arthrodesis
■ Functional muscle flaps
Accessory nerve Phrenic nerve Intercostal nerves Ulnar ECU nerve Crossed C7 Hypoglossal nerve
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+■ Motor cycle accident open wound
![Page 55: Brachial plexus - Alpha Hand Surgery Centre Plexus Formed by ventral ... Upper plexus C5 C6 – unable to Abduct shoulder (deltoid/ supraspinatus) ER shoulder ... the level of innervation](https://reader033.vdocuments.us/reader033/viewer/2022042605/5ab60c3a7f8b9adc638da0c8/html5/thumbnails/55.jpg)
+
C5C6
Vertebral foramen
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+
■ Accessory to suprascapular
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+
Accessory Injured upper trunk
Superascapular nerve
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+
■ Oberlin nerve transfer
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+Oberlin nerve transfer
Biceps m.
Ulnar n.Anastamosis
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+
Radial to axillary transfer
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+
Axillary n (inverted)
Radial n.
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+
ICN 4
ICN 5
ICN 6
Musclocutaneus n
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+Treatment options’ indication
■ Neurolysis
■ Nerve repair
■ Nerve graft
■ Nerve transfer
■ Tendon transfer
■ Arthrodesis
■ Functional muscle flaps
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+
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+
Latismus dorsi m.
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+Latismus dorsi transfer to flexion elbow and extension finger
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+Deltoid paralysis
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+
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+
■ Trapez to Deltoid
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+Treatment options’ indication
■ Neurolysis
■ Nerve repair
■ Nerve graft
■ Nerve transfer
■ Tendon transfer
■ Arthrodesis
■ Functional muscle flaps
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+
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+
■ Shoulder arthrodesis in BPI
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+Treatment options’ indication
■ Neurolysis
■ Nerve repair
■ Nerve graft
■ Nerve transfer
■ Tendon transfer
■ Arthrodesis
■ Functional muscle flaps
![Page 74: Brachial plexus - Alpha Hand Surgery Centre Plexus Formed by ventral ... Upper plexus C5 C6 – unable to Abduct shoulder (deltoid/ supraspinatus) ER shoulder ... the level of innervation](https://reader033.vdocuments.us/reader033/viewer/2022042605/5ab60c3a7f8b9adc638da0c8/html5/thumbnails/74.jpg)
+
Gracillis harvest Accessory n.
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+
First stage of Doi procedure
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+
Partial ulnar n. as a donor nerve
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+
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+Summary
Brachial plexus injury
Open sharp injury Shot gun Tractional injury
Immediate exploration under observation
Exploration No improvement in 2-3 m
Explor. In 12 m. Non-anatomic improvement
Peripheral reanimation > 12m .
Gradual improvement
Low energy
High energy
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+
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+
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+
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+
Median NerveInjuries, assessment & management
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+ Anatomy of the median
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+ Anatomy of the median
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+ Anatomy of the median
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+ Anatomy of the median
Superficial layer of muscles: PT, FCR, PL FCU Intermediate layer of muscles: FDS
Deep layer of muscles: PQ, FPL, FDP
Thener eminence muscles: OP, ABPb, FPB
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+ Clinical evaluation
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+
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+ Clinical evaluation
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+High median nerve
palsyInjury of the median nerve above
the level of innervation of the forearm muscles with paralysis of PT, PQ, FCR, FDS, FDP (2nd -3rd ),
FPL, PL, Sensory loss, opposition loss
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+
Low median nerve palsy
Injury of the median nerve below the level of innervation of the forearm muscles with only Sensory & opposition loss
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+
Tendon transfer…
Goals; opposition, IP flexion of 1st & 2nd digits,
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+FDS opponensplasty (Bunnel
type)
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+EIP Opponensplasty
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+ ADM use in Huber transfer.
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+Camitz Procedure
![Page 97: Brachial plexus - Alpha Hand Surgery Centre Plexus Formed by ventral ... Upper plexus C5 C6 – unable to Abduct shoulder (deltoid/ supraspinatus) ER shoulder ... the level of innervation](https://reader033.vdocuments.us/reader033/viewer/2022042605/5ab60c3a7f8b9adc638da0c8/html5/thumbnails/97.jpg)
+Side tenorraphy of FDP & brachioradialis to FPL transfer in high median nerve
palsy
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+
Radial Nerve Palsy
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+Background
■ The radial nerve is the most frequently injured nerve in the upper extremity
Barton, 1973
■ Complete injury to the radial nerve results in the loss of ■ Finger extension ■ Thumb extension ■ Wrist extension
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+
ANATOMY
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+Pathogenesis
■ Orthopedic injury
■ Tumor and inflammation
■ Anatomic compression
■ Open wounds
■ Other causes
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+Tumor and Inflammation
■ Radial nerve compression can occur as a result of either a benign or malignant neoplasm
■ Benign lesions arising from the elbow or proximal radius can lead to PIN paralysis ■ Lipoma ■ Fibroma ■ Ganglion
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+
CLINICAL EVALUATION
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Sensory Examination
■ Anesthesia on dorsum: ■ Thumb, index and long
fingers
■ 1st and 2nd metacarpal webspaces
■ Since deficit is not on a tactile surface, the loss is usually trivial
Barton, 1973
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+Motor Examination
DEFICIT LEVEL
Triceps Brachial plexus
Brachioradialis
ECRL
Extension of wrist
& MP joints
Extension &
abduction of thumb
Proximal radial nerve
Humeral shaft
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+Motor Examination
■ Posterior interosseous nerve
■ Radial deviation of wrist with extension
■ Unable to extend fingers and thumb at MP joints
■ No sensory deficit
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+
MANAGEMENT
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OPEN LESION
EXPLORE
NO INJURY
OBSERVE (3 months)
IMPROVEMENT
DONE
NO IMPROVEMENT NERVE CONDUCTION STUDIES
INJURY
SURGICAL
RECONSTRUCTION
Lowe, Sen, Mackinnon, 2002
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OPEN LESION
EXPLORE
NO INJURY
OBSERVE (3 months)
IMPROVEMENT
DONE
NO IMPROVEMENT NERVE CONDUCTION STUDIES
INJURY
SURGICAL
RECONSTRUCTION
Lowe, Sen, Mackinnon, 2002
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OPEN LESION
EXPLORE
NO INJURY
OBSERVE (3 months)
IMPROVEMENT
DONE
NO IMPROVEMENT NERVE CONDUCTION STUDIES
INJURY
SURGICAL
RECONSTRUCTION
Lowe, Sen, Mackinnon, 2002
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OPEN LESION
EXPLORE
NO INJURY
OBSERVE (3 months)
IMPROVEMENT
DONE
NO IMPROVEMENT NERVE CONDUCTION STUDIES
INJURY
SURGICAL
RECONSTRUCTION
Lowe, Sen, Mackinnon, 2002
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CLOSED LESION
OBSERVE (3 MONTHS)
IMPROVEMENT
DONE
NO IMPROVEMENT NERVE CONDUCTION STUDIES
SURGICAL
RECONSTRUCTION
Lowe, Sen, Mackinnon, 2002
SUSPECT TRANSECTION
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CLOSED LESION
OBSERVE (3 MONTHS)
IMPROVEMENT
DONE
NO IMPROVEMENT NERVE CONDUCTION STUDIES
SURGICAL
RECONSTRUCTION
Lowe, Sen, Mackinnon, 2002
SUSPECT TRANSECTION
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CLOSED LESION
OBSERVE (3 MONTHS)
IMPROVEMENT
DONE
NO IMPROVEMENT NERVE CONDUCTION STUDIES
SURGICAL
RECONSTRUCTION
Lowe, Sen, Mackinnon, 2002
SUSPECT TRANSECTION
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CLOSED LESION
OBSERVE (3 MONTHS)
IMPROVEMENT
DONE
NO IMPROVEMENT NERVE CONDUCTION STUDIES
SURGICAL
RECONSTRUCTION
Lowe, Sen, Mackinnon, 2002
SUSPECT TRANSECTION
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+Splinting
■ During the observation and potentially nerve regeneration period, splinting becomes an important adjunct
■ Prevent joint contractures
■ Prevent over-stretching of the denervated extensor musculature
■ Maximizing hand function
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+Static Volar Wrist Cock-up Splint
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+Dynamic Tenodesis Suspension Splint
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+Dorsal Wrist Cock-up With Dynamic Finger Extension Splint
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+Tendon Transfers
■ Goals in radial nerve palsy 1) Wrist extension
2) Finger (MP joint) extension
3) Thumb extension and abduction
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+FCU Transfer
■ PT to ECRB
■ FCU to EDC
■ PL rerouted to EPL
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FCU Transfer
■ EDC tendons identified proximal to the extensor retinaculum
■ Fenestrate EDC tendons in slight oblique orientation from proximal ulnar to distal radial
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FCU Transfer
■ Transfer is set with FCU in maximum tension
■ Wrist in slight extension
■ MP joints fully extended
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FCU Transfer
■ PL to EPL dorsal to the 1st compartment
■ Both PL and EPL placed under maximum tension
■ Wrist neutral with thumb extended and radially abducted
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+FCR Transfer
■ PT to ECRB
■ FCR to EDC
■ PL rerouted to EPL
Starr, 1922
Tsuge, 1969
Brand, 1975
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FCR Transfer
■ Brand (1975) ■ Divide EDC tendons to allow
end-end sutures between FCR and EDC
■ Tsuge (1969) ■ Pass FCR through interosseous
membrane