gerries new Flashcards
What is Benign paroxysmal positional vertigo
MC cause of vertigo
sudden onset of dizziness and vertigo triggered by changes in head position
inner ear problem
What are features of Benign paroxysmal positional vertigo
vertigo triggered by change in head position (e.g. rolling over in bed or gazing upwards)
may be associated with nausea
Symptoms settle after around 20 – 60 seconds
positive Dix-Hallpike manoeuvre
What is Dix-Hallpike manoeuvre
rapidly lower the patient to the supine position with an extended neck
a positive test recreates the symptoms of benign paroxysmal positional vertigo
rotatory nystagmus towards the affected ear
How is Symptomatic relief given for Benign paroxysmal positional vertigo
Epley manoeuvre (successful in around 80% of cases)
teaching the patient exercises they can do themselves at home, termed vestibular rehabilitation, for example Brandt-Daroff exercises
what causes BPPV
caused by crystals of calcium carbonate called otoconia that become displaced into the semicircular canals
What is MC location of BPPV
posterior semicircular canal.
What can displace crystals of calcium carbonate in ear
viral infection, head trauma, ageing or without a clear cause.
what does peripheral cause of veritgo mean
the problem is located in the inner ear rather than the brain.
What is the Epley manoeuvr
move the crystals in the semicircular canal into a position that does not disrupt endolymph flow.
What is recurrence rate of BBPV
half will have recurrence 3-5 years after their diagnosis
WHat age group has highest risk of falls
over the age of 65 have the highest risk of falling with 30% of those over 65 and 50% of those over 80 falling at least once a year
What medical conditions could contribute to fall
Stroke
MS
Parkinson’s disease
Infection
Vasovagal syncope
Arrhythmias
Diabetes
Anaemia
pneumonia
Chronic pain
What medication can cause fall
Beta-blockers (bradycardia)
Diabetic medications (hypoglycaemia)
Antihypertensives (hypotension)
Benzodiazepines (sedation)
Antibiotics (intercurrent infection)
WHat can falls lead to
fractures, particularly hip fractures, which have high rates of disability and death
How can fall be investigated
- orthostatic blood pressure measurements to detect postural hypotension
- ECG for cardiac arrhythmias
- Imaging studies if fracture or intracranial injury is suspected
- Cranial nerve examination
- Medication Review
What are types of Non-Accidental Falls
Syncope-related Falls:
Gait/Balance-related Falls:
Muscle Weakness-related Falls:
How is Functional Ability Assessed
Timed Up and Go test (TUG) or Berg Balance Scale (BBS)
What is included in a full falls risk assessment.
Gait
Visual problems
Hearing difficulties
Medications review
Alcohol intake
Cognitive impairment
Postural hypotension
Continence
Footwear
Environmental hazards
WHat is Frailty
multidimensional syndrome, is characterised by diminished strength, endurance and physiological function
What are two types of Frailty
physical frailty and frailty phenotype
What si physical frailty
weight loss, exhaustion, low physical activity, slowness and weakness
what is frailty phenotype
includes cognitive and social aspects
What are clinical implications of frailty
higher risk of adverse health outcomes such as falls, delirium, disability and hospitalisation
What is the significant implications of Frailty on treatment
altered pharmacokinetics and pharmacodynamics
How is frailty assessed
Fried Frailty Index or Groningen Frailty Indicator
How is frailty managed
multi-component interventions including exercise, nutrition optimisation and medication review
What is Osteoporosis
severe reduction in bone mineral density and defects in bone tissue micro-architecture.
What is the T Score at the Hip of Osteopenia
-1 to -2.5
what can cause secondary Osteoporosis
Hyperthyroidism
Hyperparathyroidism
Alcohol abuse
Immobilisation
How is Tscore measured
femoral neck, measured on a DEXA scan
What are two type of primary Osteoporosis
- Postmenopausal osteoporosis (type I)
- age-related osteoporosis (type II)
what is Osteopenia
less severe decrease in bone density
why do post-menopausal women experience increased degradation of bone tissue
decreased levels of oestrogen
What is the T Score at the Hip of Osteoporosis
Less than -2.5
What is the T Score at the Hip of severe Osteoporosis
Less than -2.5 plus a fracture
What is Z-score
the number of standard deviations the patient is from the average for their age, sex and ethnicity
What are RF for Osteoporosis
Older age
Post-menopausal women
Reduced mobility and activity
Low BMI (under 19 kg/m2)
Low calcium or vitamin D intake
Alcohol and smoking
Personal or family history of fractures
What is T-score
number of standard deviations the patient is from an average healthy young adult.
Is T score or Z score used to make diagnosis of Osteoporosis
T score
What chronic diseases are RF for osteoprosis
Chronic diseases (e.g., chronic kidney disease, hyperthyroidism and rheumatoid arthritis)
Where does Tamoxifen block oestrogen receptors
blocks oestrogen receptors in breast tissue but stimulates oestrogen receptors in the uterus and bones
helps prevent osteoporosis
What medications are RF for osteoporosis
Long-term Glucocorticoids (e.g., 7.5mg or more of prednisolone daily for longer than 3 months)
Certain medications (e.g., SSRIs, PPIs, anti-epileptics and anti-oestrogens)
What are the most common pathological fractures seen in osteoporosis
Vertebral compression fractures
Neck of femur
Colles fractures (fall on an outstretched arm)
What investigations ca exclude any secondary causes of osteoporosis
Quantitative CT and US of the heel
History and physical examination
FBC
U&Es (serum calcium, creatinine, phosphate)
LFTs (ALP, transaminases)
TFTs
25-OH vit D & 1,25-OH vit D
Serum testosterone & prolactin
Lateral radiographs of lumbar and thoracic spine
Protein immunoelectrophoresis and urinary Bence-Jones protein
What selective oestrogen receptor modulator (SERM) is used to treat osteoporosis
Raloxifene
stimulates oestrogen receptors in the bone but not in the uterus or breast.
How is 10-year risk of a major osteoporotic fracture and a hip fracture calculated
FRAX tool
What clinical risk factors are in FRAX
Age (between 40 and 90 years)
Gender
Previous fracture
Parent fractured hip
Smoking
Glucocorticoids (more than 3 months at a dose of prednisolone 5mg daily)
Rheumatoid arthritis
Secondary osteoporosis
Alcohol consumption
BMD
What are DDx for osteoporosis
Osteomalacia
Paget disease of bone
myeloma, primary and metastatic bone tumours, lymphoma
What is the initial management for osteoporosis
Lifestyle modification for the prevention of osteoporotic fractures
- Falls risk assessment
- Weight-bearing and muscle strengthening exercises
- Calcium (at least 1000mg)
- Vitamin D (400-800 IU)
- Calculation of 10-year probability of osteoporotic fragility fracture
What is the first-line pharmacological treatment for osteoporosis
Bisphosphonates
What is insufficient intake of calcium
less than 700mg per day
How do Bisphosphonates work
inhibit osteoclast-mediated bone resorption
What are SE of Bisphosphonates
Reflux and oesophageal erosions
Atypical fractures (e.g., atypical femoral fractures)
Osteonecrosis of the jaw (regular dental checkups are recommended before and during treatment)
Osteonecrosis of the external auditory canal
How is oral Bisphosphonates taken
empty stomach with a full glass of water
patient should sit upright for 30 minutes before moving or eating
WHat are examples of Bisphosphonates
Alendronate 70 mg once weekly (oral)
Risedronate 35 mg once weekly (oral)
Zoledronic acid 5 mg once yearly (intravenous)
What is an alternative treatment option is bisphosphonates are not suitable
- Denosumab (a monoclonal antibody that targets osteoclasts)
- Romosozumab (a monoclonal antibody that targets sclerostin – a protein in osteocytes that inhibits bone formation)
- Teriparatide (acts as parathyroid hormone)
- Hormone replacement therapy (particularly in women with early menopause)
- Raloxifene (a selective oestrogen receptor modulator)
- Strontium ranelate (a similar element to calcium that stimulates osteoblasts and blocks osteoclasts)
What does Raloxifene increase risk of
venous thromboembolism.
What is a pathological fracture
when a bone breaks due to an abnormality within the bone
what are ways to describe how a bone breaks
- Transverse
- Oblique
- Spiral
- Segmental
- Comminuted (breaking into multiple fragments)
- Compression fractures (affecting the vertebrae in the spine)
- Greenstick
- Buckle (torus)
- Salter-Harris (growth plate fracture)
What classification can be used to describe fractures of the lateral malleolus (distal fibula).
Weber classification