Back pain Flashcards
What are 2 groups that back pain can be classified into? 2 forms of classification
Neck pain vs lower back pain
With and without radiculopathy
What region of the back does ‘low back pain’ affect?
Lumbosacral area, between bottom of ribs and top of legs
What type of back pain is most low back pain termed?
Non-specific back pain
What are 2 complications of non-specific back pain?
- Development of chronicity and depression
- Disability and loss of employment
What is the typical picture and course of non-specific back pain? 3 key features
- Chronic problem in which periods of little pain or disability are interrupted by acute episodes of severe pain
- Varies with posture
- Exacerbated by movement
What are 4 key aspects of the management of non-specific low back pain?
- Assess risk of back pain disability using risk stratification tool
- Providing adequate analgesia (NSAID first line, codeine with or without paracetamol if NSAID CI or not tolerated). If paraspinal muscles are in spasm, short course of benzodiazepine
- Provide info about expected time course, self-help measures, staying active, resuming normal activities, return to work as soon as possible
- Offer people at higher risk of back pain disability referral for group exercise and/or CBT and/or physiotherapy
When should you urgently refer someone with low back pain?
Refer urgently to neurosurgeon or orthopaedic surgeon if red flags including progressive, persistent, or severe neurological deficit
When should you make a non-urgent referral for non-specific lower back pain? What are 4 services you can refer to?
If symptoms not improving or worsening
- Group exercise
- Cognitive behavioural therapy
- Physiotherapy
- Specialist low back pain services for assessment
What are 8 examples of specific causes of low back pain?
- Sciatica
- Vertebral fracture
- Osteoporosis
- Intra-abdominal pathologies (pancreatitis, peptic ulcer, kidney stones)
- Ankylosing spondylitis
- Shingles (herpes zoster)
- Cancer
- Infection
What may non-specific low back pain be related to, despite not being attributed to a specific cause?
Trauma or musculoligamentous strain
What are 4 risk factors for the development of non-specific low back pain?
- Obesity
- Physical inactivity
- Occupational factors (e.g. heavy lifting)
- Depression and other psychological conditions
How long does it take for most episodes of non-specific back pain to resolve with self care?
4 weeks
What are 4 risk factors for long-term pain and functional disability due to low back pain?
- Pain lasting longer than 12 weeks
- Psychosocial distress
- Maladaptive coping strategies such as avoidance of work, movement, or other activities due to fear of exacerbating back pain
- Pain coping characterised by excessively negative thoughts about the future (‘catastrophizing’)
What are 6 things to ask about in the low back pain history?
- Type of pain
- Duration of symptoms
- Aggravating and relieving factors
- Associated symptoms
- Radiation of pain
- Night pain
What are 8 parts of the examination in low back pain?
- Observe gait and posture
- Inspect for skin changes: bruising, rash, deformity or swelling
- Neurological exam: loss of sensation
- Change to reflexes
- Limitation of range of movement
- Straight leg raise
- Tenderness
- Fever
What is part of the examination to consider in low back pain that doesn’t have to be carried out in primary care?
Assessment of anal tone
What are 4 causes of back pain that you are trying to rule out with red flag symptom questions?
- Cauda equina syndrome
- Cancer of the spines
- Spinal fracture due to trauma or osteoporotic collapse
- Spinal infection
What are 6 examples of intra-abdominal causes of low back pain?
- Peptic ulcer
- Pancreatitis
- Kidney stones
- Pyelonephritis
- Prostatitis
- Pelvic infection
What are 4 symptoms that should make you suspect ankyosing spondylitis as a cause of low back pain?
- Pain at night not relieved when person is supine
- Stiffness in morning that is relieved with movement/ exercise
- Gradual onset of symptoms
- Symptoms that have lasted for more than three months
What are 6 features that could suspect osteoporosis as a cause of low back pain?
- Non-specific pain
- Localised tenderness if vertebral fracture
- Female sex
- Advancing age
- Current or previous smoking history
- Use of corticosteroids
When should you suspect herpes zoster (shingles) as a cause low back pain?
If person has unilateral pain and rash in the distribution of a dermatome
What are 5 symptoms that suggest low back pain is caused by sciatica?
- Unilateral leg pain radiating below knee to foot or toes
- Low back pain - less severe than leg pain
- Numbness, tingling and muscle weakness in distribution of a nerve root (dermatome)
- Positive straight leg raising test - causes greater pain radiation below knee and/or more nerve compression symptoms
- Extensor (upgoing) plantar response - when lateral part of sole of foot is stimulated, toes extend and fan outwards
When should you perform an x-ray for lower back pain?
If suspicion of specific pathology, such as compression fracture due to osteoporosis
What are 5 red flag symptoms to ask about to exclude cauda equina syndrome?
- Severe or progressive bilateral neurological deficit of the legs, such as major motor weakness with knee extension, ankle eversion, or foot dorsiflexion
- Recent-onset urinary retention and/or urinary incontinence
- Recent-onset faecal incontinence
- Perianal or perineal sensory loss (saddle anaesthesia or paraesthesia)
- Unexpected laxity of anal sphincter
What causes urinary retention in cauda equina syndrome?
Bladder distension because sensation of fullness is lost
What causes urinary incontinence in cauda equina syndrome?
Loss of sensation when passing urine
What causes faecal incontinence in cauda equina syndrome?
Loss of sensation of rectal fullness
What is cauda equina syndrome?
Nerve roots of the cauda equina are compressed (L2-coccygeal) most commonly due to massive herniated disc in lumbar region, and disrupt motor and sensory function to the lower extremities and bladder
What is the commonest cause of cauda equina syndrome?
Massive herniated disc in lumbar region
What are 5 red flags to rule out that would point to spinal fracture as a cause of lower back pain?
- Sudden onset severe central spinal pain relieved by lying down
- History of major trauma e.g. RTA, fall
- Minor trauma, or strenuous lifting in pt with osteoporosis/ use corticosteroids
- Structural deformity of spine e.g. step from one vertebra to adjacent vertebra
- Point tenderness over a vertebral body
What are 9 red flags to rule out that would point to cancer as a cause of lower back pain?
- Age >50y
- Gradual onset of symptoms
- Severe unremitting pain that remains when supine, aching night pain that prevents/disturbs sleep
- Pain aggravating by straining e.g. at stool or when coughing or sneezing
- Thoracic pain
- Localised spinal tenderness
- No symptomatic improvement after 4-6 weeks of conservative low back pain therapy
- Unexplained weight loss
- Past history of cancer esp breast, lung, GI, prostate, renal, thyroid
What are 5 red flags to rule out that would point to infection as a cause of lower back pain?
- Fever
- Tuberculosis, or recent UTI
- Diabetes
- History of IV drug use
- HIV infection, use of immunosuppressants, or person otherwise immunocompromised
How should you manage a patient with low back pain with red flag symptoms and signs?
Admit or refer urgently for specialist assessment, or imaging, using clinical judgement
What are 5 broad aspects of the managemet of non-specific low back pain?
- Assess with risk stratification tool such as STarT Back
- Self management advice
- Analgesia
- Advise to follow up if symptoms persist or worsening after 3-4 weeks, and report any red flags
- If at higher risk of poor outcome, refer for group exercise/ CBT/ physiotherapy
What is a key risk stratification tool for non-specific low back pain and what is it for?
STarT Back - to identify modifiable risk factors (biomedical, psychological and social) for back pain disability
What are the 4 most important things to guide management in suspected non-specific low back pain?
- Quality of life
- Pain severity
- Function
- Psychological distress
What is the suggested analgesia management of low back pain?
- NSAID first line e.g. ibuprofen or naproxen
- If NSAID CI, not tolerated, or ineffective: codeine with or without paracetamol
- If muscle spasm: short course of benzodiazepine