Medical Act Flashcards
How many doctors appointments are stress-related and how many adults experience adverse effects of stress?
75-90% of doctor’s appointments
> 40% of patients
What is the vicious cycle of negative stress?
- Insufficient coping mechanisms
→ extreme stressor
→ very negative perceived stressor
→ multiple influencing factors - Homeostasis can not be preserved
→ Original stressor remains
→ Effects of stressor prevent coping with new stressors
→ New stressors and original ones accumulate
What are the 3 stages of stress of the general adaptation syndrome by Hans Seyle?
Alarm Stage
Resistance Stage
Exhaustion Stage
What happens in the alarm stage of the GAS model?
→ Activation of hypothalamus, adrenal glands and sympathetic nervous system
What happens in the resistance stage of the GAS model?
→ Increased hormonal levels
→ Body systems operate at peak performance
What happens in the exhaustion phase of the GAS model?
→ Body unable to respond further
→ Body damaged by increasing demands
→ Increased HR and BP
→ Increased bronchodilation and ventilation
→ Increased blood glucose (cortisol)
→ Arousal of CNS and muscle activation (cortisol)
→ Decreased inflammatory and immune response (cortisol)
These are effects caused by?
Stress
A stressor causes the secretion of which molecules?
→ Increased ACTH secretion (Adenocorticotropic Hormone)
→ Increased cortisol secretion
What is the HPA stress reaction and is it fast or slow?
HPA (hypothalamus - pituitary gland - adrenal cortex) → slow stress reaction
- Hypothalamus releases CRH/CRF within 15sec
- After a few minutes pituitary gland releases ACTH
- Within 20min adrenal glands release glucocorticoids → e.g. cortisol
How long does it take the adrenal glands to release cortisol?`
approx 20 minutes
What is the SAM stress reaction and is it fast or slow?
SAM (Sympathetic Adreno Medullary) → fast stress reaction
- Hypothalamus stimulates adrenal medulla
- Adrenaline and noradrenaline are released
“A state of imbalance within the body” what is meant here?
Stress
What is allostasis?
process of bringing body back into a state of homeostasis
How many of stages until burn out is reaches are there?
12
- Must last for at least 2 weeks
- Can vary from mild to severe
- Feeling sad or having a depressed mood
- Loss of interest or pleasure in activities once enjoyed
- Changes in appetite → weight loss or gain unrelated to diet
- Trouble sleeping or sleeping too much
- Loss of energy or increased fatigue
- Increase in purposeless physical activity
- Slowed movements and speech
- Feeling worthless or guilty
- Difficulty thinking, concentrating or making decisions
- Thoughts of death and suicide
These are typical symptoms of which pathology?
Depression
What are typical stress related somatic disorders?
- Herpes simplex
- Crohn disease (autoimmune disease of the bowel)
- Arrhythmias (fibrillation)
- Psoriarsis
- Obesity
- High BP
- Cardiovascular diseases
What are typical conditions treated by an internist?
→ Cancer
→ Arteriosclerosis
→ High BP
→ Diabetes
Latin term musculoskeletal system?
tractus locomotorius
Latin term neurological system?
tractus neurologicus
Latin term nerve system?
tractus cerebrospinalis
Latin term cardiovascular system?
tractus circulatorius
Latin term pulmonary system?
tractus respiratorius
Latin term gastro-intestinal system?
tractus digestivus
Latin term Genito-urinary system
tractus urogenitalis
Latin term endocrine system?
tractus hormonalis
Latin term skin system?
tractus integumentaris
What is palpitation?
Herzrasen
What is the cardiac control centre of the body?
The medulla
Where are baroreceptors and what is their function?
→ In wall of aorta and carotid arteries
→ Detect changes in blood pressure
Result: Change in rate and force of cardiac contraction
How does sympathetic activity influence the heart beat?
→ Tachycardia → Increase in heart rate and contractility
How does parasympathetic activity influence the heart beat?
→ Bradycardia → Decrease in heart rate and contractility
What is a normal heart beat?
60-100bpm
What is the average stroke volume?
70ml per contraction (by one ventricle)
What is peripheral resistance?
- Force opposing the blood flow
- Amount of friction between vessel walls and blood
Decreased sympathetic stimulation causes what type of vessel movement?
→ Systemic vasodilation
(THERE IS NO PARASYMPATHETIC NERVE INNERVATION IN BLOOD VESSELS)
Increased sympathetic stimulation causes what type of vessel movement?
→ Systemic vasoconstriction
How can the BP be calculated?
Blood pressure = cardiac output x peripheral resistance
How much blood does the human body carry on average?
Approx. 5L
How much of the blood made of plasma and what does it contain?
55% plasma
→ Proteins
→ Water
→ Amino acids, fats, carbs, vitamins, enzymes, electrolytes, waste products
How much of the blood made of cells and what types are there?
45% cells
→ Leukocytes
→ Erythrocytes
→ Thrombocytes
What is hemostasis?
prevention of blood loss by coagulants
What are characteristics of restrictive lung diseases?
- Decrease in total volume of air that the lungs are able to hold
- Often due to decrease in elasticity or problem related to expansion of the chest wall during inhalation
What are typical restrictive lung diseases?
- Lung cancer
- Interstitial lung disease
- Paralysis of diaphragm
- Spinal injury
- Kypho-scoliosis
- Obesity
- Morbus Bechterew
What are characteristics of obstructive lung diseases?
Airflow blockage and breathing related problems
What are typical obstructive lung diseases?
- Asthma
- COPD
- (Acute) brochi(oli)tis
- Bronchiectasis
- Cystic fibrosis
What are the 4 domains of disease burden in pulmonary diseases?
→ Complaints and limitations (CCQ ≤ 2) and dyspnea (mMRC ≤ 3)
→ Frequency of exacerbations (lung attacks) → ≥ 2 attacks/year treated with oral corticosteroids
→ Nutritional status (weight, BMI)
→ Degree of airway obstruction (FEV1)
In case of pulmonary disease indication what does the GP want to rule out?
heart failure
When is an increased disease burden in pulmonary diseases given?
If one of the subdomains is abnormal
What is a normal arterial oxygen pressure (PaO2)?
75-100 mmHg
At what level is hypoxemia present?
marked decrease in arterial oxygen pressure PaO2 < 60mmHg (< 8kPa)
At what level is hypercapnia present?
increase in PaCO2 (> 45mmHg or > 6kPa) → increase in ventilation
How does an increased PaCO2/hypercapnia lead to an increase in ventilation?
Increase in PaCO2 (> 6kPa) → gas diffusion to cerebrospinal fluid → decrease in PH → stimulation of respiratory centre → increase of ventilation
What are normal oxygen levels in arterial blood?
Approx. 20ml of oxygen per 100ml of blood in arteries
What are normal oxygen levels in venous blood?
Approx. 15ml of oxygen per 100ml of blood in veins
What can hypersensitivity to a drug lead to?
may lead to mild reaction or anaphylaxis
What are idiosyncratic/paradoxical effects of a drug?
unexpected or unusual reactions
What are iatrogenic effects of a drug?
negative effects due to medication error, overdose or unusual response
What are teratogenic/harmful effects of a drug?
developmental disorders in foetus
What is the result of a synergy of drugs?
combination of drugs causes an increase in effect
What is the result of antagonism of drugs?
combination of drugs causes a decrease in effect
What is the result of potentiation of drugs?
drug A enhances the effect of drug B
An optimal dose of drugs depends on?
→ Absorption
→ Transport in blood
→ Half-life
→ Biotransformation
By what is a dose expressed?
weight or measure and time factor
What are the two goals of medication-receptor interaction?
→ Stimulation
→ Inhibition
Which drugs lower blood pressure?
→ Angiotensin converting enzyme inhibitors (ACE inhibitors)
→ Beta blockers
→ Calcium channel blockers
→ Diuretics
→ Adrenergic blocking drugs
- Nitroglycerin
- Long-acting isosorbide
What kind of medication is this?
Vasodilators
What are vasodilators used for?
To treat angina attacks and prophylactic
How do vasodilators work and what are side effects?
Action:
→ Reduce peripheral resistance
→ Reduce workload of heart
→ Coronary arteries dilate
→ Better balance of oxygen supply and demand in heart muscle
→ Drop in BP
Side effects:
→ Dizziness
→ Red face
Enalapril
What kind of medication is this?
ACE-Inhibitor
What are ACE-Inhibitors used for?
- Decrease BP
- Tackle congestive heart failure