W1: MC Flashcards
What is a red flag? What must be done immediately?
Sign and symptom of serious pathology
(Early detection is essential! Immediate referral!)
What is a yellow flag?
Indicators of psychological, social, and environmental factors that may influence the patient’s recovery and prognosis eg anxiety, depression, fear of movement
What is an orange flag?
Indicators of serious psychiatric conditions that require immediate attention.
What is a blue flag?
Indicators related to the patient’s perceptions of their work and occupational factors
What is a black flag
Indicators related to socio-occupational factors and system or contextual obstacles.
General characteristics of a red flag?
- Severe and/or progressive symptoms
- Non mechanical pain
- Night pain or pain at rest
- Systemic symptoms eg fever/weight loss
Provide examples of red flags and their incidence?
Cancer (0-5%)
Infection (0.01-1.2% for spinal infection)
Fracture (0.7-10%)
Cauda equina syndrome (0.002-0.4%)
What are the risk factors/signs for cancer?
Unexplained weight loss
History of cancer
Age over 50
Pain that is unrelenting and worse at night
What are the risk factors/signs for infection?
Fever
Recent bacterial infection
IV drug use
Immune suppression
FRII (Red flags for infection - RI)
What are the risk factors/signs for a fracture?
History of trauma or fracture
Osteoporosis
Prolonged corticosteroid use
Presence of contusion or abrasion
Age >50
Severe, localised pain
HOP PAS
What are the risk factors/signs for cauda equina syndrome?
Severe low back pain
Saddle anesthesia
Bladder or bowel dysfunction
Bilteral leg pain and weakness
Neurological deficits eg loss of sensation in the perineal area or reduced reflexes in the legs
True or false is a single characteristic alone sufficient to diagnose a serious condition
False - generally multiple red flags will indicate a serious condition eg severe back pain accompanied by fever and a recent bacterial infection might strongly suggest an infection
Downie 2013 - Diagnostic accuracy of red flags in a fracture. What are the red flags and their percentages in relation to diagnostic accuracy?
Older age: 2-7% in primary care
Prolonged corticosteroid use: 33%
Severe trauma: 11%
Presence of contusion or abrasion: 62%
Downie 2013 - Diagnostic accuracy of red flags in a malignancy. What are the red flags and their percentages in relation to diagnostic accuracy?
History: 7%
Older age: below 3%
Unexplained weight loss: below 3%
Failure to improve symptoms (1 month) below 3%
Article: Most red flags for malignancy in low back pain guidelines lack empirical support: A systematic review
- A “…… ….. …..” and “….. …… …..” are the only red flags with empirical evidence of acceptable high diagnostic accuracy.
A “history of malignancy” and “strong clinical suspicion” are the only red flags with empirical evidence of acceptable high diagnostic accuracy.
Article: Red flags to screen for vertebral fracture in patients presenting with low-back pain (Review)
True or False: The available evidence does not support the use of many red flags to specifically screen for vertebral fracture in patients presenting for LBP.
True
- Most red flags have poor diagnostic accuracy as indicated by imprecise estimates of likelihood ratios.
- When combinations of red flags were used the performance appeared to improve.
Structure of the intervertebral disc - two key features?
Annulus fibrosus (outside) & Nucelus pulposus (inside)