MSK Flashcards
What is the name of pain, swelling and impaired function of the tendon of the gastrocnemius and soleus muscles?
Achilles tendinopathy
Is mid-portion or insertional Achilles tendinopathy more common?
Mid-portion
Where does mid-portion Achilles tendinopathy affect?
Area of the Achilles tendon roughly 2-6cm above its insertion on the calcaneus
What intrinsic factors can increase risk of Achilles tendinopathy?
Biomechanical abnormalities, diabetes, high cholesterol, hyperuricaemia, and inflammatory disorders
What extrinsic factors increase the risk of Achilles tendinopathy?
Previous injury, footwear, training factors (hard surface, interval training etc), and some drugs
Which drugs increase the risk of tendinopathy?
Corticosteroids
Quinolones
Statins
Aromatase inhibitors
What are the risk factors for Achilles tendon rupture?
-Increasing age
-Tendinopathy
-Poor blood supply
-Some medications
-Some sports or change in exercise regime
-Previous Achilles tendon injury
How long can Achilles tendinopathy take to improve with conservative management?
12 weeks minimum, however can last up to 2 years
What symptoms may a patient report with Achilles tendon rupture?
Sudden onset pain
Audible snap
Difficulty weight-bearing
A patient who runs and has recently started training for a marathon comes in reporting left sided heel pain and stiffness in heel on waking or sitting for a while.
What signs might indicate the likely diagnosis?
Achilles tendinopathy:
-Erythema/oedema/asymmetry
-Tenderness to palpation
-Pain on dorsifelxion
-Poor heel-raise endurance test
A patient who runs and has recently started training for a marathon comes in reporting left sided heel pain and stiffness in heel on waking or sitting for a while.
Is imaging needed to make the diagnosis here?
No - ultrasound or MRI is not routinely needed or recommended in primary care, it is a clinical diagnosis
Is complete Achilles tendon rupture painful?
Not always - roughly 1/3 do not complain of pain
What does Simmonds triad help to exclude?
Achilles tendon rupture
What is Simmonds triad?
Angle of Declination
Palpation
Calf Squeeze test
How is Simmonds triad assessed?
Pt lies prone with feet over edge of couch:
-Angle of declination may be greater (dorsiflexion) in injured limb
-Gap felt in tendon on palpation
-Gentle squeezing of calf will cause foot to remain neutral if acute rupture has occurred
Why can chronic Achilles tendon rupture be difficult to diagnose?
Pain and swelling go down with time, any gap will fill with fibrous tissue, calf may be wasted, and other muscles help with plantar flexion of foot
A patient who runs and has recently started training for a marathon comes in reporting a sudden snap sound while running, left sided heel pain and stiffness in heel on waking or sitting for a while. Simmonds triad is present.
What is the management in this case?
Admission or same-day referral to orthopaedics as per local protocol
A patient who runs and has recently started training for a marathon comes in reporting left sided heel pain and stiffness in heel on waking or sitting for a while. Simmonds triad is not present.
What is the management in this case?
-Manage any underlying conditions
-Ice, rest, simple analgesia
-Weight-bear as tolerated
How long might Achilles tendinopathy take to improve with conservative management?
7-10 days
If Achilles tendinopathy fails to improve after 7-10 days with conservative management, what should be recommended?
Physiotherapy referral
If chronic Achilles tendinopathy fails to improve after conservative management and physiotherapy, what should be recommended?
Referral to sports physician or orthopaedics
What options does secondary care have for managing chronic Achilles tendinopathy?
-Exercise programmes
-Shock-wave therapy
-Surgery
What analgesics are used for mild-to-moderate pain?
-Paracetamol
-NSAIDs e.g. ibuprofen/naproxen
-Aspirin
-Weak opioids
If a child does not respond to both paracetamol and ibuprofen for pain management, what should be done?
Discussion with specialist
Why is it good for combination analgesics to be avoided first-line?
Prescribing single constituent analgesics allows for independent titration of each drug
What are the two types of NSAID?
Non-selective COX-1 and COX-2 inhibitors, and Coxibs (highly selective for COX-2 enzymes)
How do COX enzyme inhibitors work?
Reversibly inhibit cox enzyme thereby inhibiting prostaglandin synthesis, which inhibits vasodilation, inflammation, and platelet aggregation and bronchoconstriction/dilation
Which are the non-selective NSAIDs?
Diclofenac, ibuprofen, indomethacin, naproxen
Which are the coxib NSAIDs?
Celecoxib and etoricoxib
How does aspirin work?
Salicylate NSAID which irreversibly inhibits COX enzymes and blocks thromboxane production.
How does paracetamol work?
Not fully understood but thought to inhibit cox enzymes in CNS
How do weak opioids work?
Binding to opioid receptors in CNS, GI tract and other systems, leading to decreased pain perception.
Why is tramadol different to other weak opioids?
It also directly inhibits noradrenaline and serotonin uptake in CNS to alter how pain is perceived
What are the most common causes of bites?
Dogs, cats, and humans
Where do most human bites occur?
On the hand
What might a deliberate human bite indicate?
Abuse, child abuse, or sexual crime, or expression of frustration in children
Why are abscesses and osteomyelitis more common after cat bites than after dog or human bites?
Fluids can only drain from small skin puncture wounds, so retention of infectious agents etc more common due to cats long but fine sharp teeth
What are the complications of bites?
-Bacterial infection
-Tetanus
-Cat scratch disease
-Viral infections including rabies
-Structural damage
-Psychological effects
What bacteria are common following human bites?
Strep spp
Staph aureus
Haemophilus spp
Anaerobic bacteria
What bacteria are common following animal bites?
Most are polymicrobial
What causes tetanus?
Clostridium tetani which releases tetanus toxin
What are the effects of tetanus toxin?
Generalised rigidity
Muscle spasms
After a bite, what questions should be asked regarding tetanus/BBV risk?
-Tetanus status
-Contaminants and mechanism of bite
-BBV vaccination status
-Biter BBV status if known
Should patients with human bites be offered antibiotics?
Yes IF skin was broken and blood drawn, or skin broken in high risk area or patient at high risk of infection
What prophylactic antibiotics should be offered after a human or animal bite when indicated?
Co-amoxiclav for 3 days
If pen allergic - metro and doxy
What antibiotics should be offered for an infected human or animal bite?
Co-amox for 5 days
Doxycyline and metronidazole for 5 days if pen allergic
How should clinical tetanus be managed?
IV antibiotics and IVIG
Tetanus vaccine after recovery
Supportive care
Who needs antibiotics after a cat/animal bite?
Anyone who’s skin has been broken and bite drawn blood
What can cause a burn?
thermal energy, electrical, chemical, or radiation energy
What can be burnt?
Skin most commonly, but also airways, lungs, muscles, bones, and internal organs
What is a scald?
A burn caused by contact with hot liquid or steam
What is a complex burn?
A burn due to electrical or chemical substance, any thermal burn to critical area (face, extremities, genitalia, perineum), or affecting >15% total surface are of an adult (10% in children)
What is a non-complex burn?
Partial thickness burns up to 15% adult body surface area, up to 10% of child’s surface area, that does not affect a critical area
Deep partial thickness on up to 1% of BSA
Why is the voltage of an electrical burn important to know?
It determines the extent of tissue damage - higher voltage causes more extensive tissue damage