Week 4 Flashcards
What anatomical landmark on the back can be used to help guide insertion for a lumbar puncture or epidural?
The spinous process of the L4 vertebra
What layers does a needle have to pass through when performing a lumbar puncture?
Skin
Superficial fascia
Supraspinous ligament
Interspinous ligament
Ligamentum flavum
Epidural space
Dura
Arachnoid
Subarachnoid space (site of CSF sampling)
What are the extrinsic muscles of the back?
Trapezius
Latissimus dorsi
Levator scapulae
Rhomboid major and Rhomboid minor
What are the intrinsic muscles of the back (collectively known as the erector spinae)?
Spinalis
Longissimus
Iliocostalis
Describe the features of a vertebra
Body
x2 pedicles
x2 laminae
Spinous process
x2 transverse processes
What are the names of the laterally positioned sheets of pia mater that anchor the spinal cord to the arachnoid mater, located between the anterior and posterior roots?
Denticulate ligaments
What is the name of the screening questionnaire used to screen for potential alcohol problems?
What are the 4 parts of it?
CAGE questionnaire
- have you ever felt the need to cut down on your drinking?
]2. have people annoyed you by criticising your drinking?
- have you ever felt guilty about drinking?
- have you ever felt like you needed a drink in the morning (eye opener) to steady your nerves or get rid of a hangover?
2 “yes” responses warrants further investigation
What is the name of the full alcohol use disorders identification test?
What is the name of the subset of questions from this test that was developed for speedy use in emergency departments?
Alcohol Use Disorders Identification Test (AUDIT)
Quick version used in emergency departments - FAST screening tool
What would be the best treatment for this patient?
2 month history of paranoid delusions about neighbour using bluetooth device to poison the food in his fridge, auditory hallucination of his neighbour’s voice threatening to kill him, some formal thought disorder, no mood disturbance.
- no past psychiatric history and no previous treatment for this episode
- well-controlled type 2 DM, no acute physical illness
1. Lithium Carbonate
2. Risperidone
3. Olanzapine
4. Clozapine
5. Mirtazapine
- Lithium carbonate is a mood stabiliser for BPD, not appropriate here
- Risperidone is an atypical antipsychotic and would be first line
- Olanzapine is another atypical but has a higher rate of weight gain
- Clozapine is a third line option used in treatment-resistant cases
- Mirtazapine is a MAOI used to treat depression
What is the best description of this woman’s current mental state?
“I felt great a few weeks ago, couldn’t have been better, I’m still very restless but now feeling ill-at-ease. I’m worried that there’s something terrible wrong with me, cancer or a stroke, something like that. I can’t get the thoughts of dying a painful death out of my mind. At first I enjoyed being able to think so quickly, I had so many great ideas, now I’m still thinking fast but it’s all horrible thoughts. I can’t sit still, the nurses keep telling me to stop fidgetting and pacing about the ward but I can’t. Then I get annoyed with them and shout, which makes things worse.”
- Depression
- Mania without psychotic symptoms
- Hypomania
- Mixed affective state
- Cyclothymia
- Mixed affective state is symptoms of both mania/hypomania at the same time as depression, but neither predominate
She has been hospitalised, so cannot be Hypomania by definition
Cyclothymia is basically a much milder form of BPD
When taking a patient history from someone with suspected Dementia, what important questions should you not forget to ask about?
Do you drive?
Do you have a source of money/income? - risk of being exploited
What test is used (in practice) to assess someone for Dementia?
Montreal Cognitive Assessment (MOCA) - in practice the Addenbrooke’s Cognitive Exam is used but isn’t free
What is the most common form of mental health problem in hospitalised patients over the age of 65?
Delirium - mean prevalence of 20% and lots of cases are missed
In a patient with delirium, how might their consciousness be impaired?
Clouding
Drowsiness
Sopor (abnormally deep sleep)
Coma
In a patient with delirium, how might their cognition be disturbed?
Disorientation of time but also sometimes of place and person
Impaired memory and attention
Impaired thinking
Perceptual disturbance, hallucinations and delusions (commonly visual)
In a patient with delirium, how might they experience psychomotor disturbance?
Hyperactive/hyperalert - agitation, disorientation, hallucinations and delusions
Hypoactive/hypoalert - confusion, sedation, misdiagnosed as depression
In a patient with delirium, how might their sleep-wake cycle be disturbed?
Insomnia
Sleep loss
Reversal of sleep cycle
Nocturnal worsening of symptoms - sundowning
Disturbing dreams and nightmares
Delirium is slow/rapid onset and has a steady and predictable/transient and fluctuating course
Rapid onset
transient and fluctuating course
What investigation is used to assess if a patient has likely Delirum? What are the 4 components of this test?
4AT
- alertness (normal/mild sleepiness/clearly abnormal)
- AMT4 - age, DoB, place, current year
- attention - “starting at December, work backwards”
- acute change or fluctuating course
How should a patient with delirium be managed?
- Identify and treat the cause
- Manage the environment and provide support
- Prescribe - sedating drugs can worsen delirium. Alcohol withdrawal requires benzodiazepines, commonly Chlordiazepoxide or Diazepam. Otherwise, antipsychotics are standard treatment e.g. Haloperidol 1-10mg
- Review
How long does delirium last for?
Mean duration is 1-4 weeks, often longer in the elderly
Minority can become chronic
What is the most common neuropsychiatric complication of a stroke, seen in up to 1/3 of patients?
Post stroke depression
This is also seen post-MI, with 65% of patients developing depressive symptoms after heart attack
How does dementia compare to delirium and depression in terms of onset, duration, course, alertness, orientation, memory, thinking, perception, emotions and sleep?
Onset - insidious
Duration - months/years
Course - stable, progressive, step-wise
Alertness - normal
Orientation - normal, or impaired to place/time
Memory - recent and remote impaired
Thinking - slowed, reduced interest
Perception - hallucinations seen in 30-40%
Emotions - shallow, labile, irritable
Sleep - nocturnal wandering and confusion