Point of Care Ultrasound on the Field of Play K AT I E N ANOS, MD
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1 Point of Care Ultrasound on the Field of Play K AT I E N ANOS, MD H I GH P ERFORMANCE S PORTS MEDICINE P HYSI ATRIST, P R ACTICING S PORTS MEDI CINE
2 No disclosures
3 No disclosures Who am I?
4 Objectives Over the course of this session, we will: review some US fundamentals, including advantages and disadvantages of US use discuss the normal and abnormal appearances of different tissues (tendons, ligaments, and bones) and some relevant acute injuries that can be assessed on a sideline demonstrate/allow for hands-on practice of identifying these structures and pathologies
5 2009
6 2009
7 2009
8 Anisotropy
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12 Choose a transducer Left: high frequency (15-7 MHz), small footprint, linear array transducer; hockey stick Center: high frequency (17-5 MHz) linear array transducer Right: low to medium frequency (5-2 MHz) curvilinear transducer linear transducers (higher frequency) are used for superficial imaging (e.g. knee, CMC) curvilinear transducers (lower frequency) are used for deeper structures (e.g. hip)
13 Sonographic evaluation of a normal tendon high frequency linear transducer is often best LAX: tightly packed linear, fibrillar pattern DIST SAX: stippled cluster of dots, broom end homogenous scan from myotendinous junction to bony insertion
14 Tendinosis thickened hypoechoic heterogenous +/- enthesopathy +/- calcification +/- neovascularity PROX RT PAT TND LAX RT ACH LAX DIST
15 Tendinosis thickened hypoechoic heterogenous +/- enthesopathy +/- calcification +/- neovascularity PROX RT PAT TND LAX RT ACH LAX DIST
16 Partial tendon tear Focal defect well defined not anisotropy seen in two planes dynamic imaging bursal vs articular sided vs intrasubstance Background tendinosis tendon usually thick may be atrophic if chronic or high grade PROX LT HS LAX RT PAT TND LAX PROX
17 Full thickness tendon tear From articular bursal surface Focal incomplete, entire width complete Gap vs absence control for anisotropy Acute fluid Chronic scar Identify tendon ends edge shadowing dynamic imaging LAX MEDIAL SAX
18 Full thickness tendon tear From articular bursal surface Focal incomplete, entire width complete Gap vs absence control for anisotropy Acute fluid Chronic scar Identify tendon ends edge shadowing dynamic imaging LAX MEDIAL SAX
19 Full thickness tendon tear From articular bursal surface Focal incomplete, entire width complete Gap vs absence control for anisotropy Acute fluid Chronic scar Identify tendon ends edge shadowing dynamic imaging
20 Full thickness tendon tear From articular bursal surface Focal incomplete, entire width complete Gap vs absence control for anisotropy Acute fluid Chronic scar Identify tendon ends edge shadowing dynamic imaging ACH LAX DIST Complete Achilles rupture with edge shadowing
21 Tendon injuries
22 Achilles tendon tear: Dynamic evaluation ACH LAX ACH SAX
23 Acute posterior ankle pain 21 y/o NCAA division I track and field athlete Acute left posterior ankle pain developed during 100 M sprint Physical exam: minimal ecchymosis mild swelling along the medial Achilles border negative Thompson test achilles tendon palpably intact pain with active plantar flexion
24 acute plantaris tear/tendinosis RT ACH SAX MED
25 Distal biceps tendon Medial: pronator window elbow 90 degrees flexion, forearm full supination transducer placed parallel to humeral shaft, distal end at medial epicondyle translate anteriorly until distal tendon attachment is in view dynamically evaluate with pronation/supination
26 Distal biceps tendon Medial: pronator window elbow 90 degrees flexion, forearm full supination transducer placed parallel to humeral shaft, distal end at medial epicondyle translate anteriorly until distal tendon attachment is in view dynamically evaluate with pronation/supination
27 Distal biceps tendon Cobra view U BT R
28 Small avulsion seen with cobra view Partial tear with peritendinous edema but intact with dynamic imaging through pronator window
29 Pectoralis major tendon
30 Pectoralis major tendon
31 Pectoralis major tendon
32 Pectoralis major tendon
33 Pectoralis major tendon
34 Pectoralis major tendon
35 Pectoralis major tendon
36 Pectoralis major tendon most common tears are partial thickness and at the myotendinous junction
37 Anterior chest deformity 32 year old RHD hockey player
38 Anterior chest deformity 32 year old RHD hockey player acute onset pain and chest/arm weakness during eccentric phase of bench press during dryland training
39 Anterior chest deformity 32 year old RHD hockey player acute onset pain and chest/arm weakness during eccentric phase of bench press during dryland training Exam: ecchymosis over ipsilateral anterolateral chest wall and axilla loss of anterior axillary fold relative weakness with arm adduction and internal rotation
40 Identify LHBT in bicipital groove in short axis Scanning technique
41 Identify LHBT in bicipital groove in short axis Translate distally until you see the pec tendon come in medially in long axis
42 Rotate 90 degrees for short axis view Anterior layer all of clavicular head, part of the sternal head Posterior layer sternal head
43 Pectoralis major retracted tear (curved arrow), adjacent hemorrhage (open arrow), and no visible tendon in its expected location (arrowheads) superficial to the biceps tendon (B) - left side = medial
44 Ligament injuries
45 Ankle inversion ATFL evaluation appearance of ligaments similar to tendon retracted edges uncommon loss of ligament wavy appearance FIB TAL
46 Ankle inversion ATFL evaluation appearance of ligaments similar to tendon retracted edges uncommon loss of ligament wavy appearance NORMAL ATFL, LAX FIB FIB TAL TAL
47 Ankle inversion ATFL evaluation appearance of ligaments similar to tendon retracted edges uncommon loss of ligament wavy appearance NORMAL ATFL, LAX FIB TAL
48 Ankle inversion ATFL evaluation appearance of ligaments similar to tendon retracted edges uncommon loss of ligament wavy appearance NORMAL ATFL, LAX COMPLETE ATFL TEAR, LAX FIB FIB TAL TAL FIB TAL
49 Elbow: ulnar collateral ligament (UCL)
50 Elbow: ulnar collateral ligament (UCL) Anterior fibers Overuse: microtrauma from repetitive valgus stress overhead athletes Acute trauma: elbow dislocation valgus instability
51 Elbow: ulnar collateral ligament (UCL) Hyperechoic compact fibers Medial epicondyle to sublime tubercle Dynamic valgus stress testing at 30 degrees; partial tear more common >1mm difference between resting and stress test suggests full thickness involvement side to side comparison is most helpful Complete tear: separation of fibers LAX
52 UCL sprain
53 UCL sprain
54 Medial collateral ligament (MCL) Normal: fibrillar structure medial femoral condyle tibia superficial and deep layers deep layer attached to medial meniscus
55 MCL sprain typically proximal LAX most helpful deep vs superficial thick and hypoechoic defect uncommon valgus stress test can be done (dynamic evaluation) chronic +/- calcium
56 MCL sprain typically proximal LAX most helpful deep vs superficial thick and hypoechoic defect uncommon valgus stress test can be done (dynamic evaluation) chronic +/- calcium
57 Fractures
58 Sonographic evaluation of fractures Helpful: when x-ray unavailable radiographically occult fracture unsuspected fractures during routine exams early stress fractures We see: interruption of smooth cortical surface periosteal thickening hyperemia soft tissue edema pain on sonopalpation early callus formation RT 5 TH MET LG DIST
59 Acute distal fibular fracture
60 4 th metacarpal fx Fourth metacarpal fracture. (A) (A) Normal radiographs in a patient with post-traumatic pain at the fourth metacarpal phalangeal joint. (B) (B) Long-axis sonogram with (C) Doppler imaging of the dorsal aspect of the distal fourth metacarpal showing a minimally displaced fracture (arrow). Note the periosteal thickening (black arrowheads) and vascularity within the periosteum (white arrowheads).
61 Ischial avulsion fracture
62 Ischial avulsion fracture
63 Ischial avulsion fracture
64 Heel pain 25 year old avid runner with 2 weeks of right lateral calcaneal pain amidst training for a marathon wants to keep running PE consistent with possible stress fracture of calcaneus x-rays are negative
65 Occult calcaneal stress fracture Right side (symptomatic) Left side (asymptomatic)
66 Rib fracture US more sensitive than x-ray Direct signs: discontinuity of cortex acoustic edge shadowing localized pain Indirect signs: local hematoma reverberation artifact pneumothorax
67 Rib fracture US more sensitive than x-ray Direct signs: discontinuity of cortex acoustic edge shadowing localized pain Indirect signs: local hematoma reverberation artifact pneumothorax Scanning technique palpate the region of max tenderness identify rib in SAX evaluate the length of the rib in LAX don t forget the include the osteochondral junction
68 Rib fracture US more sensitive than x-ray Direct signs: discontinuity of cortex acoustic edge shadowing localized pain Indirect signs: local hematoma reverberation artifact pneumothorax Scanning technique palpate the region of max tenderness identify rib in SAX evaluate the length of the rib in LAX don t forget the include the osteochondral junction Subacute rib fracture with callus formation
69 SAX LAX
70 DEMO
71 Thank you
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