MSK Flashcards
Describe the presentation of an Iliopsoas Abscess?
Pain relieved by hip flexion
Pain worse on extension and internal rotation, can be lower back pain
Patient is sitting on back with knees flexed and hips externally rotated slightly.
What imaging is used in an Iliopsoas abscess?
CT is first line
What is the commonest organism causing an Iliopsoas Abscess?
S. Aureus
What is the managment of an Iliopsoas abscess?
Surgical drainage and IV abx for 4-6 weeks
How is a non displaced patellar fracture with no extensor mechanism issues managed?
Hinged knee brace with weight bearing. 6 weeks
How is a displaced patellar fracture or one with an affected extensor mechanism managed?
Surgically fixed then hinged knee brace with weight bearing.
Signs and Symptoms of Iliotibial Band Syndrome
Runner
Lateral Knee pain
Extension and Flexion can induce a snapping feeling
What imagining is used in SUFE?
AP and Lateral Frog Leg X-ray
Clinical sign of SUFE
Reduced internal rotation especially when leg is flexed . Leg is sitting externally rotate.
What fracture is likely to present following a FOOSH
Colles Fracture - Dinner Fork Deformity
Distal Dorsally Displaced Radius.
Falling onto a flexed wrist or backwards onto outstretched hand is likely to result in what kind of fracture?
Smiths Fracture - Garden Spade Deformity
Distal Volar displacement of Radius.
A painful thumb occurring after a fist fight is likely to be what?
Bennets Fracture
Interarticular fracture at he base of the thumb metacarpal
What is a Monteggia Fracture?
Ulnar Fracture
Radial Head Dislocation - pain at elbow
What is a Galeazzi Fracture?
Radial Fracture
Distal Radioulnar Dislocation
If a young person presents with pain over radial head after a FOOSH. What could it be?
Radial Head Fracture
McMurrays test is positive in what?
Meniscal Tear - Pain on crouching is also common
Extracapsular / Intertrochanteric - Stable Fracture
Dynamic Hip Screw
Extracapsular / Intertrochanteric - Oblique, Reverse or Sub-trochanteric
Intramedullary Device
Damage to the median nerve at the level of the wrist presents with.
Carpal Tunnel like syndrome
Damage to the median nerve at the level of the elbow present with.
Carpal Tunnel symptoms Reduced forearm pronation Weak wrist flexion Ulnar devotion of the arm sign of benediction
Damage to the Anterior Interosseus Nerve
Reduced pronation of the forearm
Cant make the OK sign due to reduced thumb and forefinger flexion.
What fracture is likely to damage the anterior interosseus nerve?
Supracondylar Fracture - paediatric - direct blow to elbow or falling on elbow
A tibial fracture is likely to be associated with what nerve being damaged?
Sural nerve - posteriolateral distal 1/3 lower leg
- lateral foot and ankle
Sural nerve damage will present like this.
Sensory loss only
Posterolateral distal 1/3 of lower leg
Lateral foot
Finger fixed in flexion + Fusiform swelling + Tenderness
Tendon Flexor Tenosynovitis
IV abx + elevation +/- surgical debridement
What is the commonest reason for a THR revision and how does it present?
Aseptic loosening
Pain radiating to the knee and on weight bearing
Still able to walk and weight bear.
What is affected in De Quervians Tenosynovitis?
Extensor Pollicus Brevis and Abdcutor Pollicus Longus tendon sheath
If a post menopausal women presents with a fracture do they require a DEXA scan?
No
Bisphosphonates are used and no need for a DEXA atm
What is gold standard for rib fractures but what is usually enough?
CT scan is gold standard but X ray is usually enough
Management of rib fractures
Adequate analgesia
12 weeks and no repair -> surgery
Who do you refer a patient to if they present with a flail chest?
Cardiothorasic surgeon
4-8 years Male Reduced ROM Limp Pain
Perthes
Perthes Management
X ray is diagnostic
<6 - monitor
>6 or severe disease - surgery
Describe the classification of Ankle fractures.
Webers A- below syndesmoses - generally stable = moon boot
Webers B - level of syndesmoses - can be unstable observe taller shift
Webers C - Above level of sydesmoses - requires open surgery and fixation
List two bad things that would indicate an unstable ankle fracture on X - ray ?
Bi malleolar fracture - observe medial malleolus
Talar Shift look for a widened gap
Tibial Shaft Fracture - describe
Open fracture are common
Risk of compartment syndrome
Tibial Shaft Fracture - Management
Above the knee cast - conservative
IM nailing, ORIF - surgical
Tibial Plateau # what nerve is at risk?
Common peroneal nerve
Sensory lateral lower leg and top of the foot
Dorsiflexion
Eversion
Tibial Plateau - Management
ORIF, External Fixator, Delayed Total Knee Replacement - surgical
Above Knee cast - conservative
What splint is used in a femoral shaft fracture ?
Thomas Splint
In an old patient with a suspected pelvic fracture, where is usually affected? and how does this affect management?
Inferior and superior Pubic rami fracture
Usually managed conservatively
How are most humeral shaft fractures managed?
Conservatively
Distal = cast
Proximal = Humeral brace sling
What nerve is at risk in a proximal humeral fracture?
Axillary Nerve - badge patch dermatome
What nerve is at risk in a humeral shaft fracture?
Radial nerve
Neuropraxia
Temporary block - symptoms last up to 28 days
Axonotmesis
Demyelination distal to injury
Takes a long time as nerve regenerates 1mm a day
Neurotmesis
Nerve transection - no recovery without surgical repair
What is you concern with a intracapsular fracture?
Risk of avascular necrosis
Retinacular arteries get torn
What vessel supplies the retinacular arteries
Medial circumflex femoral artery
Hip fracture - what X-ray and what are you looking for?
AP and Lateral
Loss of Shentons line and prominent lesser trochanter
What nerve is at risk in a Hip fracture
Sciatic nerve damage
Sciatic nerve damage will present with what?
Weak Knee flexion
Weak Ankle dorsiflexion and plantar flexion
Hip fracture - presentation
Acutely shortened and externally rotated leg
Hip dislocation - presentation
Pain and inability to bear weight
Posterior - Internally rotated
Anterior - Externally rotated
Posterior Dislocation - hip
Commonest type
Dashboard injury - leg internally rotated, adducted and flexed
Anterior Dislocation - hip
Less common - more likely if linked to motor bike accident
Hyperabducted and extended
What nerve is at risk during a posterior hip dislocation?
Sciatic
Point tenderness over greater trochanter
Generalised pain over lateral leg
Pain reproducible by resisting lateral abduction
Trochanteric Bursitis
Point tenderness over greater trochanter
Generalised pain over lateral leg
Pain reproducible by resisting lateral abduction
Trochanteric Bursitis
What is a major risk with femoral artery catheterisation?
Retroperitoneal bleed - posterior wall of common femoral or external iliac artery.
Surgery is only life saving method
What trauma is a femoral artery at risk of rupture?
Proximal femur fracture
What nerve is responsible for a trendelenburg gait?
Superior Gluteal Nerve - supplies gluteus minimus medius and tensor fascia lata
Describe a trendelenburg gait and how this can tell you what side is affected.
When standing on affected side the opposite leg and pelvis drop down
Body tilts towards affected side
What other non neuro causes of a Trendelenburg gait is there?
Muscle weakness
Perthes disease
osteonecrosis of the hip
Developmental dysplasia
What nerve is affected in meralgia parasthetica ?
Lateral Femoral cutaneous nerve
Obese pregnant Diabetic lady wearing tight jeans
Anterolateral thigh pain and paraesthesia
Meralgia Paraesthetica
A patient who cant sit on their wallet for along period of time without pain.
Pain tingling and numbness over buttocks and sciatica distribution
Piriformi syndrome
Muscle injury or hypertrophy
In a severe hamstring tear what fracture may occur?
Avulsion fracture of the ischial tuberosity
Where is the safe space to administer an IM injection in the buttocks?
Superiolateral quadrant
In a tibiofemoral dislocation what are you worried about?
Neurovascular compromise as displace bone compresses popliteal fossa and its contents
What is your management of a tibifemoral dislocation?
Immediate reduction
Neurovascular exam
ABPI
CT angiogram
Lateral epicondyle pain in a keen runner and cyclist
Knee pain on flexion extension
Iliotibial band syndrome
What artery supplies the ACL?
Distal Medial Geniculate Artery
Whats the unhappy triad?
MCL ACL Medial Meniscus
Whats the commonest combination of soft tissue injury in the knee?
ACL MCL and Lateral Meniscus
Pain Erythema Boginess over patella
Person kneels a lot
Prepattelar bursitis
Pain over distal patellar ligament
Kneels a lot
Superficial infrapatellar bursitis
Patient generally kneels a lot but with a more upright back
Pain over patellar ligament laying over tibial tuberosity
Deep infra patellar bursitis
Suprapatellar Bursitis
Supra patellar pain selling redness warmth and reduced ROM
Generally there will have been a preceding superficial wound and bacterial infection.
Ruptured Bakers Cyst
Calf pain, warmth, erythema and swelling.
USS required to rule out DVT
Anterior knee pain on stairs
Prolonged stiffness
Teenage girl
Chondromalacia Patellae
- patellar cartilage is softened