More disorders Flashcards
Compartment syndrome
When the pressure within a compartment increases, restricting the blood flow to the area and potentially damaging the muscles and nearby nerves. It usually occurs in the legs, feet, arms or hands, but can occur wherever there’s an enclosed compartment inside the body.
What areas does compartment syndrome usually affect?
Calf and forearm
Causes of Compartment syndrome
Trauma (complication of fracture)
Continued pressure on a limb (eg. Lying for hours in the same position on the same limb. Often seen in drug and alcohol abuse)
Clinical features of Compartment syndrome
Often co-exists with fractures
Suspicious if Pain out of proportion, Pain increases over time (despite analgesia)
Often increased pain on passive flexion and extension of the fingers and toes of the affected limb
Compartment syndrome investigations
Measure compartment pressure
> <30mmHg is normal
> >40mmHg is high
Compare diastolic arterial and compartmental pressures – the difference needs to be >30mmHg for adequate perfusion
Compartment syndrome Management
Fasciotomy - Needs to be done as soon as possible to minimise risk of irreversible ischaemia
Osteomyelitis
Infection of the bone and/or bone marrow - can affect all ages
Common organisms involved in osteomyelitis
o Staph aureus
o Pseudomonas
o E. coli
o Strep
Features of osteomyelitis
o Acute illness with extreme pain over the affected bone o Symptoms may vary o Fever o Erythema and swelling o Unwillingness to move limb
What groups of patients are most likely to get osteomyelitis?
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Neonates Drug users HIV
What part of bones are usually affected in osteomyelitis?
- Long bones usually
* Most commonly in the metaphysis
Investigations in osteomyelitis
Positive blood cultures
Increased WBC, ESR
Xrays - Will be normal early on, After 2 weeks will show loss of density and new bone outlining the raised periosteum
Treatment for osteomyelitis
o Rest
o IV antibiotics (flucloxacillin and gentamicin)
o Drainage of any abscesses and removal of sequestra (pieces of dead bone)
What IV antibiotics are used in osteomyelitis?
IV flucloxacillin and gentamicin
Complications of osteomyelitis
- Septicaemia
- Acute pyogenic arthritis
- Growth retardation
- Chronic osteomyelitis
What are the complications of fractures?
- Avascular necrosis
- Mal-union
- Non-union
- Delayed union
Avascular necrosis
A disease that results from the temporary or permanent loss of blood supply to the bone. When blood supply is cut off, the bone tissue dies and the bone collapses. Early complication (within 48 hours of surgery)
What bone is usually affected by Avascular necrosis?
Usually hip (treated with total hip replacement) - Can occur at the end of any long bone
How quickly does avascular necrosis (a complication of fractures) occur
Early complication (within 48 hours of surgery)
Clinical features of avascular necrosis
- Cold
- Pulseless
- Ischaemia
- Paralysis
- Paraesthesia of the limb
Investigations in avascular necrosis
- Xray – normal in the early stages
2. Angiography – confirms diagnosis
Management in avascular necrosis
Surgery to revascularise the limb
What is mal-union?
Complication of fractures - the separate areas of bone heal, but with incorrect alignment
Proper placement and reduction of the fracture at the time of injury can prevent it - Significant mal-union can be corrected by osteotomy
What is Non-union?
Complication of fractures - Non-union (the separated areas of bone do not fuse) - If union has not occurred by 6 months, then it is unlikely to do so without intervention
Investigations for non-union
- Ongoing pain
- Ongoing oedema
- Movement at the fracture site
Delayed union of bones
Difficult to distinguish between delayed and non-union
X-ray at 6 months is definitive
In both instances the join is likely to be painful throughout
How to tell difference between non-union and delayed union
X-ray at 6 months - if still no union over 6 months, it is unlikely to ever unite therefore its a non-union
Tenosynovitis
The inflammation of the fluid-filled sheath (called the synovium) that surrounds a tendon, typically leading to joint pain, swelling, and stiffness. Tenosynovitis can be either infectious or noninfectious.
Causes of Tenosynovitis
De quervain’s tenosynovitis
De Quervain’s tenosynovitis
A painful condition affecting the tendons on the thumb side of your wrist. If you have this, it will probably hurt when you turn your wrist, grasp anything or make a fist.
Clinical features of Tenosynovitis
- Pain on the radial side of the wrist - tenderness is most acute over the tip of the radial styloid
- Abduction of the thumb against resistance is painful
- Tendon sheath may be thickened
What muscles (within the tendon sheath) are affected in Tenosynovitis?
- Extensor pollicis brevis
2. Abductor pollicis longus
What are the predisposing factors for Tenosynovitis?
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Diabetes IV drug abuse Immunocompromised
Tennis elbow a.k.a lateral epicondylitis
Is an overuse injury - Exacerbated by forced palmar flexion of the wrist
Painful & tender lateral epicondyle and pain on resisted middle finger and wrist extension
Golfer’s elbow (medial epicondylitis)
Is an overuse injury - Exacerbated by forced dorsiflexion of the wrist
Treatment for overuse injuries (medial and lateral epicondylitis)
o Avoid cause o Painkillers o NSAIDs o Steroid o physio o Use of brace o They are self-limiting
Developmental dysplasia of the hip (DDH)
Dislocation or subluxation of femoral head during the perinatal period which affects subsequent development of the hip joint - If left untreated, acetabulum is very shallow. In severe cases, a false acetabulum occurs proximal to original with shorter limp.
Risk factors for Developmental dysplasia of the hip (DDH)
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Breech position in the 2nd/3rd trimester Family history Other MSK abnormalities Girl
Clinical features of Developmental dysplasia of the hip (DDH)
- Presents in babies
- Older child - lump ever since they started walking
- Limb shortening, asymmetrical groin/thigh skin
- Clicky hip
- Ortolani manoeuvre and the barlow manoeuvre – dislocatable hip
Diagnosis of Developmental dysplasia of the hip (DDH)
- USS as femoral head not ossified yet
2. X-ray after 4-6 months
Treatment for Developmental dysplasia of the hip (DDH)
- Palvik harness – up to age 4-6 months
- Over 18 months – open reduction
- Splint
Transient synovitis
Commonly called irritable hip, is the most common cause of limping in children. It is due to inflammation (swelling) of the lining of the hip joint. In most cases of irritable hip, your child will have recently recovered from a viral infection.
o 2-10 years
o More common in boys
o Insidious onset
Most common cause of hip pain in childhood
Transient synovitis
Clinical features of Transient synovitis
- Low grade pyrexia
- Generally well
- Limp - Resistance to internal rotation
- Pain on thigh/groin, knee
- Restricted range of motion
Investigation for Transient synovitis
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Throat swab (to check for recent infection) Osteomyelitis possible diagnosis – MRI to exclude Aspiration of him or open surgical drainage to limit cartilage damage
Treatment for Transient synovitis
NSAID + rest. Pain resolves in weeks
Perthes AKA Legg-Calve-Perthes disease
Idiopathic osteochondritis of the femoral head - Afects 4 – 9 years, usually boys - Transient
A rare childhood condition that affects the hip. It occurs when the blood supply to the rounded head of the femur is temporarily disrupted. Without an adequate blood supply can lead to avascular necrosis.
Clinical features of Perthes disease
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Reduced range of movement Pain at the groin, knee, thigh, buttocks Limp Unilateral Loss of internal rotation Loss of abduction – positive Trendelenburg test
Investigations for Perthes disease
- Bloods
2. Xray (can show femoral head collapse)
Treatment for Perthes disease
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Bed rest Recurrent attacks increase the risk of necrosis Avoidance of physical activity
Trendelenburg test
A useful procedure for detecting hip-joint dysfunction.
A positive Trendelenburg sign is identified when the patient is unable to maintain the pelvis horizontal to the floor while standing first on one foot and then on the other foot
Slipped Upper Femoral Epiphysis (SUFE)
Fat teenage boys - Femoral head slips inferiorly in relation to the femoral neck - 10-16 years
Higher incidence in black people
Causes of Slipped Upper Femoral Epiphysis (SUFE)
- Local trauma
- Mechanical factors
- Genetics
- Hypothroidism or renal disease may predispose to SUFE
NOT actaully known what causes SUFE could be weight and horomes
Why is there knee pain in Slipped Upper Femoral Epiphysis (SUFE)
Might present with knee pain due to obturator nerve supplying both hip and knee joint
Examination findings in Slipped Upper Femoral Epiphysis (SUFE)
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Pain on hip Loss of internal rotation*** Trethowans’ sign X-ray shows subtle changes. Lateral view must be taken
Treatment for Slipped Upper Femoral Epiphysis (SUFE)
- Pin the femoral head to prevent further slippage
2. Risk of avascular necrosis
What conditions are associated with Carpal tunnel syndrome?
Hypothyroidism and acromegaly; RA; conditions with increased fluid retention; fracture (colles)
What nerve is affected in Carpal tunnel syndrome?
Median nerve
Carpal tunnel syndrome
Is caused by pressure on the median nerve. The carpal tunnel is a narrow passageway surrounded by bones and ligaments on the palm side of your hand. When the median nerve is compressed, the symptoms can include numbness, tingling and weakness in the hand and arm.
Clinical features of Carpal tunnel syndrome
> Numbness
Tingling, Pain
Pins and needles
Affects thumb, index, middle and half of ring finger
Wasting of the thenar eminence (late sign)
Investigations for Carpal tunnel syndrome
- Phalen’s test (upside-down prayer sign to elicit symptoms)
- Tinel’s test (tapping over the medial aspect of the wrist to elicit symptoms)
Diagnosis of Carpal tunnel syndrome
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Often made clinically
> If in doubt – nerve conduction studies
Phalen’s test
Upside-down prayer sign to elicit symptoms
Tinel’s test
Tapping over the medial aspect of the wrist to elicit symptoms
Treatment for Carpal tunnel syndrome
- Splint
- Steroid injections
- Surgical decompression
Cubital tunnel syndrome
Involves pressure or stretching of the ulnar nerve (also known as the “funny bone” nerve), which can cause numbness or tingling in the ring and small fingers, pain in the forearm, and/or weakness in the hand.
Causes of Cubital tunnel syndrome
Compression and stretching
Acute/delayed trauma
OA
RA
Clinical features of Cubital tunnel syndrome
- Pain
- Paraesthesia
- Numbness (over ring and little finger)
- Weak pinch
- Claw hand deformity
Claw hand
Clawing of the 4th and little finger - in cubital tunnel syndrome
Investigations for Cubital tunnel syndrome
Froment’s sign (patient holds paper with fingers and needs to exert considerably more force than expected to hold it)
Froment’s sign
Patient holds paper with fingers and needs to exert considerably more force than expected to hold it
Treatment for Cubital tunnel syndrome
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Split
> Anterior transposition
Radial nerve palsy
o Axillary compression
o Trauma at the neck of the humerus
Radial nerve palsy clinical features
- Pain
- Paraesthesia
- Numbness
- Wrist drop/finger drop
Treatment for Radial nerve palsy
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Supportive Steroid injection Splint
Trigger finger
Permanently flexed finger due to tendonitis of a flexor tendon to a digit resulting in a nodular enlargement of the affected tendon.
Trigger finger epidemiology
- Males
- Caucasian
- Late adulthood
- Associated with diabetes and alcohol