Other Flashcards
Investigations for anaphylaxis following an attack?
- Allergen skin test
* IgE immunoassay
Management for anaphylaxis?
- ABCDE
- IM adrenaline
- High flow oxygen
- Chlorpheniramine (antihistamine)
- Hydrocortisone
Observe every 6-12 hours
Repeat adrenaline every 5 mins on anterolateral aspect of middle third of thigh
Presentation of aspirin (salicylate) overdose? Early and late.
Early
• Hyperventilation
• Tachycardia
• Tinnitus
Later
• Respiratory depression
• Lethargy
- Dehydration and hypokalaemia due to compensation to respiratory alkalosis (from hyperventilation)
- Leads to metabolic acidosis
Investigations for aspirin overdose?
- ABG - respiratory alkalosis => metabolic acidosis
- U+Es - hypokalaemia
- Salicylate - positive or negative
- High PT
- High AST + ALT
ECG - flat/inverted T waves, U waves (hypokalaemia)
What is multi-organ dysfunction syndrome?
- Progressive and potentially resersible physiological dysfunction of 2+ organ systems
- Induced by variety of insults including sepsis
MODS is the final stage in a continuum beginning with what?
Systemic inflammatory response syndrome + infection
What are the presentations of MODS, using the MOD score (4 stages)
Stage 1 • increased volume requirements • respiratory alkalosis • oliguria • hyperglycaemia
Stage 2 • tachypnoea • hypocapnia and hypoxaemia • moderate liver dysfunction • haematologic abnormalities
Stage 3 • shock • azotaemia (high nitrogen) • acid-base disturbance • coagulation abnormalities
Stage 4 • vasopressor dependent • oliguria/anuria • ischaemic colitis • lactic acidosis
Symptoms and signs of opiate overdose?
- Constipation (chronic)
- Drowsiness (acute)
- Nausea and vomiting
- Loss of appetite
- Sedation
- Respiratory depression
- Hypotension and tachycardia
- Pinpoint pupils
Investigations for opiate overdose?
- Therapeutic trial of naloxone
- ECG - in respiratory compromise, look for MI or QRS prolongation in propoxyphene overdose
- CXR - ARDS
How much paracetamol can cause hepatic necrosis?
> 12g
but > 4g is overdose
What is the most common intentional drug overdose in the UK?
Paracetamol
Signs and symptoms of paracetamol overdose (with reference to timing)
0-24 hours
• Asymptomatic
• Mild nausea, malaise
24-72 hours
• RUQ pain
• Vomiting
• Hepatomegaly
72+ hours • Confusion (encephalopathy) • Jaundice • Renal angle tenderness • Coagulopathy • Hypoglycaemia
Investigations for paracetamol overdose?
- Serum paracetamol - positive or negative, peaks at 4 hours
- ABG - elevated lactate
- Raised PT
Outline duct ectasia
- Dilation of terminal breast ducts
- Creamy (yellow/green) discharge
- May leak into periductal tissues and cause periductal mastitis
- Tender lump around areola
When is duct ectasia most common?
Menopause
Outline duct papilloma
- Local epithelial proliferation in large mammary ducts
- Hyperplastic - benign tumour
- Blood stained discharge
Investigations for benign breast disease?
Triple assessment
- Clinical examination
- Mammography over 35 years, ultrasound under 35 years
- FNA or biopsy
What is the most common type of breast cancer?
Invasive ductal carcinoma
Risk factors for breast cancer?
- Prolonged oestrogen exposure
- Age
- FHx
Signs of breast cancer?
- Firm, irregular, fixed breast lump
- Peau d’orange
- Skin tethering
- Fixed to chest wall
- Skin ulceration
- Nipple inversion
- Paget’s disease of the nipple (eczema-like)
On top of the triple assessment, what other investigations would you carry out for breast cancer?
- Sentinel lymph node biopsy - radioactive tracer injected into tumour
- Staging - CXR, liver USS, CT (brain/thorax), bloods
Presentation of breast cyst?
- Smooth discrete lump
* May be fluctuant
What does a fibroadenoma develop from and how does it present
- Develops from whole lobule
- Mobile, firm breast lumps
- Smooth
- Most common breast mass
Risk of malignancy with fibroadenoma, breast cyst, duct papilloma?
Fibroadenoma - no increase
Breast cyst - increase
Duct papilloma - no increase
Management of fibroadenoma?
Conservative
Surgical if > 3cm
• Excision of fibroadenoma
• Mastectomy if large lesion
2 types of breast abscess?
- Lactational
* Non-lactational (not pregnant or breastfeeding)
Cause of breast abscess?
S. aureus
Risk factor for breast abscess and mastitis (especially non-lactational)?
Smoking
How does a breast abscess present?
Both types:
• Fever
• Breast warmth and tenderness (general inflammation)
• Breast firmness
Non-lactational:
- History of previous infections
- Less pronounced systemic upset
- Scars or tissue distortion from previous episodes
- Signs of duct ectasia (e.g. nipple retraction)
Investigations for breast abscess?
- Ultrasound - hypoechoic lesion
- FNA
- MC&S
Management for breast abscess?
• FNA (therapeutic drainage)
• Antibiotics
- lac: flucloxacillin
- non-lac: flucloxacillin + metronidazole
Management for mastitis?
- Continue breastfeeding
- If systemically unwell, nipple fissure, symptoms don’t improve, +ve infection:
• Flucloxacillin for S. aureus
Outline BPPV (including cause)
- Vertigo on changing head position (e.g. gazing upward)
- Seconds to minutes (usually 10-20sec though)
- Associated with nausea
- Displacement of otoliths
Investigations for BPPV?
Positive Dix-Hallpike manoeuvre
Outline Meniere’s disease (including cause)
Recurrent episodes of:
• Tinnitus
• Paroxysmal vertigo
• Unilateral fluctuating hearing loss
Bilateral symptoms may develop after a number of years
- Aural fullness
- Nystagmus and positive Romberg test
- Minutes to hours
• Disturbed homeostasis of endolymph
Investigation for Meniere’s disease?
No diagnostic test
• Air and bone conduction for hearing
• Exclusion of other causes of symptoms
What is a classic feature of infectious mononucleosis in the peripheral blood?
Atypical lymphocytes
Features of infectious mononucleosis?
Triad:
• Sore throat
• Lymphadenopathy
• Pyrexia
- Palatal petechiae
- Hepatosplenomegaly
- Exudate on tonsils
- Jaundice in some