Orthopaedics Flashcards
What is the diaphysis?
The shaft
What are the risk factors of OA?
Increasing age
Female gender (twice as common)
Obesity
Developmental dysplasia of the hip
What are the features of OA of the hip?
chronic history of groin ache following exercise and relieved by rest
red flag features suggesting an alternative cause include rest pain, night pain and morning stiffness > 2 hours
the Oxford Hip Score is widely used to assess severity
What should you give to patients with lower back pain?
NSAIDS are now recommended first-line for patients with back pain. This follows studies that show paracetamol monotherapy is relatively ineffective for back pain
proton pump inhibitors should be co-prescribed for patients over the age of 45 years who are given NSAIDs
NICE guidelines on neuropathic pain should be followed for patients with sciatica
What stabilises the ankle joint.
Tibiofibular syndesmosis
The syndesmosis is an essential part of the ankle jointand its stability, preventing splaying of the tibia and the fibula
What Ix would you want to do for a person with suspected ankle fracture?
Bedside tests- observations, BM, pregnancy test, ECG
Blood tests - FBC, U and Es and LFTS (prophylactic anticoagulation), clotting screen if someone is on anticoags to see what their clotting time is before surgery
Imaging- ankle XR (weight beading when possible, AP and lateral and mortise views), ankle CT is used in complex fractures
Special tests
What is a talar shift?
Widening of the medial clear space
It is associated an increased risk of post traumatic arhritis
It may not be evident on non weight bearing films
Talar shift is a clear sign of instability
What is the classification system used for ankle fractures?
Weber classification, based on the level of the fibular fracture in relation to the syndesmosis.
What is weber A, B, C Classifications?
A= below the level of syndesmosis B= at the syndesmosis C= above the level of syndesmosis
What is a maisonneuve fracture?
It is where there is ankle injury but the energy may pass upward and fracture the fibula, therefore in an ankle fracture you should always examine the knee with potential xray depending on clinical findings
What is the management of weber A fracture?
Weight bear with walking boot
How do you treat weber B fractures?
May need surgical fixation, although some will be appropriate for cast immobilisation
What do you do for a weber C fracture?
ORIF
What is close contact casting?
May be used as an alternative to surgical fixation
What would your approach be to an ankle fracture?
Analgesia- conscious sedation, opiates, gas and air
Reduce and cast (backslab)
Backslab allows the ankle to swell at the front
Re assess and check neurovascular status
Repeat xray
NBM (if really unstable and you think they will be going to theatre and elevate)
Senior review
When may you consider closed contact casting?
In patients who are elderly or co-morbid (e.g. diabetes mellitus, peripheral neuropathy) closed contact casting (CCC) should be considered for definitive management. Complications associated with surgery (e.g. infection) are eliminated though there appears to be a higher risk of mal-union with CCC.
What is a colles fracture?
An extra articular fracture of the metaphsyeal region of the radius with dorsal angulation of the distal fragment and impaction
What normally causes a colles fracture?
Fall onto outstretched hand (FOOSH)
What is a Smiths fracture?
This is reverse of Colles, refers to fracture of the distal radius with volar angulation of the distal fragment. Tends to be inherently less stable than fractures with dorsal angulation
What are the presentation of wrist fractures?
Fractures of the distal radius are acute injuries, patients will present with pain, swelling and reduced function of the affected joint.
Symptoms
Pain
Reduced range of movement
Signs
Boney tenderness
Swelling
Deformity
All patients should have a full assessment (and documentation) of the limbs neurovascular status. Complete a full-body assessment for associated injuries.
What investigations do you need to do for Colles?
The diagnosis of a wrist fracture may be made clinically and confirmed by a wrist radiograph.
Bedside
Observations
Urine dip
ECG
Bloods
FBC U&Es CRP Bone profile Vitamin D Group & save Clotting screen Imaging
Wrist X-ray: PA and lateral films.
CT: allows accurate delineation of the extent of the fracture and any intra-articular involvement (not routinely required).
MRI: allows assessment of soft tissue injuries (not routinely required).
How do you manage wrist fracture?
Under 65- surgery will typically be considered. If closed reduction is possible then K wire fixation is generally preferred to ORIF
Over 65- in more elderly pts, non operative management will be considered as definitive management, where there is instability, significant deformity or neurological compromise then surgery will be considered.
What are the complications of wrist fracture?
Early
Median nerve neuropathy Ulnar nerve neuropathy Extensor pollicis longus or flexor pollicis longus rupture Compartment syndrome Medium to late
Osteoarthritis Non-union / mal-union Complex regional pain syndrome Metalwork infection Metalwork irritation
What does cauda equia normally present with?
Compression of the cauda equina (L1-S5) of the spinal nerves
It usually presents with bilateral leg weakness and paraesthesia
Also associated with bladder and bowel dysfunction
What does lumbar disc herniation present with?
Lumbar disc herniation is incorrect this usually presents with reduced power and sensation in the affected leg. This is due to nerve root compression compressing both motor and sensory nerve fibres. A positive straight leg raise test is indicative of the condition.
The sciatic nerve divides into the tibial and common peroneal nerves
Injury often occurs at the neck of the fibula
What are the characteristics of a common peroneal nerve lesion?
Most characteristic feature is foot drop
Other features..
- weakness of foot dorsiflexion
- weakness of foot eversion
- weakness of extensor hallucis longus
- sensory loss over the dorsum of the foot and the lower lateral part of the leg
- wasting of the anteror tibial and peroneal muscles