Human disease Flashcards
Most common causes of sepsis? 2 marks
UTI
Respiratory tract infection
Mechanisms of antimicrobial resistance 4 marks
- Enzymatic inactivation of drug
- Modified targets for drugs
- Reduced permeability to drug
- Efflux of drug
Do you need a MDRO test before dental check-up? 1 mark
- Smoking
- Diabetes
- Renal disease
- Low fitness
- Hyperlipidaemia
- Male
- Previous MI or stroke
What are her cardiac risk factors (2)
Smoking and hypertension
Diagnosis of angina and what you would do next (3)
- New onset presentation – puzzling pain
- Unstable angina
- Advice patient to seek medical advice.
Define hypertension
Hypertension, also known as high or raised blood pressure, is a condition in which the blood vessels have persistently raised pressure. The higher the pressure, the harder the heart has to pump. (WHO)
BP 140/90 mmHg or higher is Stage 1 hypertension
What does systolic and diastolic mean? (2) 2/2
- Systolic – ventricular contraction, blood pumping out of heart to rest of body, normal range is 90-120
- Diastolic – ventricular relaxation, ventricles filling, normal range is 60-80
What is the MOA atenolol (3)
Atenolol is a beta blocker, blocks action of beta receptors, reduces contractility, reduces HR
Adrenergic chemicals?
What is Von Willebrand Disease and how is it characterised? (2 marks)
- Congenital or inherited bleeding disorder
- Characterised by deficient or abnormal vin Willebrand factor (1)
What should your next enquiry be about regarding the medical history once you have established that they have von Willebrand disease? (2 marks)
- Establish severity of disease
- Management of the disease in terms of medication or prophylaxis in the event of an episode which may cause bleeding
What is the mode of inheritance of von Willebrand (1) and is it more prevalent in males or females or of equal prevalence (1)? (2 marks)
- Autosomal dominant
- Affects both males and females
Name five clinical manifestations of von Willebrand disease? (5 marks)
- Mucocutaneous haemorrhage
- Gingival bleeding/brushing
- Epistaxis
- Post-surgical bleeding
- Menorrhagia
- Post-partum bleeding
- Post-trauma
What prophylactic measures is the haematologist most likely to prescribe prior to extraction? (2 marks)
- vWF concentrate of DDAVP
- Tranexamic acid
Indication + Mechanism of action of statins
- ACE inhibitors – inhibit ACE which prevents angiotensin I conversion to angiotensin II, which prevents reuptake of water and sodium, reducing blood volume and reducing blood pressure
- Angiotensin II antagonists (ARB) – Inhibits angiotensin II, reduces vasoconstriction
- Calcium channel blockers – blocker calcium channels in smooth muscle thus causing dilation
- Thiazide Type Diurectics -
- Antiplatelet drugs – reduce activation of platelets, inhibits thromboxane A2, cox signalling pathway or inhibits P2Y12 ADP receptors
- Novel Oral Anticoagulants (NOAC)
- Beta blockers – blocks action of beta receptors, reduces contractility, reduces HR
- Anticoagulates – vit k antagonist, inhibits factors in clotting cascade,prevents thrombin production which inhibits clot formation
- NOACs – direct thrombin inhibitor, factor Xa inhibitors, more rapid than warfarin
- Statins – reduce action of enzyme (HMGCoA) involved in production of cholesterol
Risk factors for hypertension (smoking was not a mark)
- Smoking
- Diabetes
- Renal disease
- MaLE
- Hyperlipidaemia
- MI
- Stroke
- LV hypertrophym
- Low fitness
- Obesity
- Genes
- Environment (GRA – permanent aldosterone switched on)
- Age, family history, weight, alcohol, race, birth weight, Na intake
Safe BP ranges
- Normal BP = <120/80
- Prehypertension = 120-139/80-89
- Stage I hypertension = 140/95mmHg or higher
- Stage II –hypertension = 160/100mmHg or higher
- Severe – 180/120mmHg or higher
- Hypertensive urgency = diastolic >120
- Don’t treat dental patients with BP over 180/110
Unstable angina/COPD/stents/3 referrals to cardiologist in 3 years/hypotension/stomach ulcer – in for RCT
Q) What is angina?
Angina is chest pain caused by reduced blood flow to the heart muscles caused by a temporary obstruction of blood flow to the heart
what is meant by stent placement (2)
Stent placement is where a balloon is guided through the artery to the blockage and inflated to expand the narrowed artery so blood can flow properly