patient presenting with headache migraine/cdh low high q1. headache impact atth q2. no. of headache...
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Patient presenting with headache
Migraine/CDH
low
High
Q1. Headache impact
ATTH
Q2. No. of headache days per month
> 15 < 15
Chronic headache
Q3. Analgesic days/week
<2 >2
Not analgesicdependent
Analgesic dependent
Migraine
Q4. Reversible sensory symptoms
With aura Without auraYes No
Consider sinister headache
Consider short-lasting headaches
Headache PathwaysDavid KernickSt Thomas Health CentreExeter
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To a man with a hammerEverything is a nail
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All headache is migraine
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Classifying headache
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IHS Headache classification Primary Secondary
Migraine Tension type Cluster
Traumatic Vascular Non-vascular Substance induced Infection Metabolic Facial structures
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What do people think when they present with headache?
I need glasses (<1% headache due to undiagnosed refractive errors)
Its my blood pressure
I have a tumour
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What do GPs think patients have? Kernick 2009
02
04
06
08
01
00
Pe
rce
nta
ge
20 40 60 80 100Age
Cluster MigraineTension Secondary
Undifferentiated
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What do patients have when they present to GP with
headache? 80% migraine
15% Tension type headache
5% secondary headache
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Is it a tumour?
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Probability of significant pathology >1%.Need urgent investigation
Red Flags
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Headache presentations where probability is likely to be 0.1% and 1%. Need careful monitoring
Orange Flags
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Probability of underlying pathology is <0.1% but above background.
Needs appropriate management and follow up
there are no green flags
Yellow Flags
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Headache and tumour
Headache prevalence with tumour 70%+
Headache at presentation 50%
Headache alone at presentation 10%
(Iverson 1987)
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Population 100,000 adults each year:
220,000 population headaches
4000 GP headaches
1 tumour will present as isolated headache
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Risk of brain tumour and headache presenting to primary care (Kernick 2008)
Headache overall – 0.09%Non headache - 0.02%
Risk %
Undifferentiated headache
Primary headache
All ages 0.15% 0.045%
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Risk of brain tumour and headache presenting to primary care (Kernick 2008)
Risk %
Undifferentiated headache
Overall 0.15%
Under 50 0.08%
Over 50 0.28%
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Scan when advantages over weigh disadvantages
The advantages:
Better management - improved quantity and quality of life if positive
Allay anxiety - reassurance if negative
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The disadvantages
Resource implications
Exposure radiation with CAT scan
Exposes incidental abnormalities
Population 0.6- 6% average 2.7% (Morris 2009)
GP requests 10% (Thomas 2010)
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Luftwaffe pilots (n-2370) Weber 2006
93% normal (25% variations of norm)
6.7% abnormalities
56 cysts; 13 vascular abnormalities;4 adenomas; 4 tumours
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In reality the inputs are complex
Limited poor quality evidence base Expert opinion Medico-legal case law Patient-doctor characteristics and
approach to uncertainty Organisational factors
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Do something now
Meningitis
Thunderclap headache
Temporal arteritis
Carbon monoxide
Malignant hypertension
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Do something soon Headache with abnormal neurological examination
Headache with recent history of fits
Headache with orgasm (first presentation – now)
History of cancer elsewhere or or HIV
Exercise induced headache (not pre orgasmic)
Precipitated by Valsalva manoeuvre, cough
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Keep close eye and think carefully
Headache with significant change in pattern
Awakes from sleep
New headache over 50 years
New Cluster headache
Worse on standing
If a primary headache diagnosis has not emerged in an isolated headache after 6-8 weeks
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Diagnose a primary headache
Exclude medication overuse headache
Diagnose migraine, Tension type or Cluster
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Medication overuse headacheMedication overuse headacheH
eada
che
inte
nsit
yH
eada
che
inte
nsit
y
Migraine attacksMigraine attacks
Frequent ‘daily’ headachesFrequent ‘daily’ headaches
Withdrawal of all analgesiaWithdrawal of all analgesia
Return of episodic Return of episodic headacheheadache
Increased frequency of headache, Increased frequency of headache,
associated with increased frequency associated with increased frequency of analgesia use.of analgesia use.
Daily headache with spikes of more severe pain
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Simple Diagnostic aid
Migraine – have to lie down
Tension headache – can keep going
Cluster Headache – have to bang head
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Formal Migraine
4-72 hours
Two of : unilateral, pulsating, moderate or severe pain, aggregation by physical activity.
At least one of: nausea/vomiting, photophobia, phonophobia.
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Other diagnostic pointers for migraine
I feel nauseated
I don’t like light or sound
Movement makes things worse
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Activation anywhere in the system can lead to output in any other part of the system and vici versa
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Formal Tension Type
30 minutes – 7 days.
2 of : bilateral, non-pulsating, mild/moderate, not aggravated by activity.
No nausea, vomiting, photophobia, phonophobia.
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Thalamus +Mid Brain structures
Medication overuse headache
Tension type headache
AURA
CERVICALNUCLEI
MIGRAINECENTRE
HypothalamusCLUSTER
Headache model
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Migraine treatmentAcute
Paracetamol/Asp/Domperidone
Rectal NSAI/Domperidone
Triptan
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The Triptans
Tablets, melts, nasal spray, injection.
Side effects
Failure response is not a class effect
Treat onset of pain
Over 65 years?
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Migraine prevention
Beta blocker
Amitriptyline
Topiramate
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GPwSI?
Not secondary headache exception medication overuse headache
Unsure of diagnosis if red flag excluded
Primary headache difficult to treat
? New cluster
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Five key questions How many types of headache do you get?
Is there a family history of troublesome headache?
What pain killers are you taking?
What is the impact of your headache?
What do you think is causing it?
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Two key examinations
Blood pressure
Fundoscopy
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One key delaying tactic
Go away and keep a diary
Make a double appointment next time