WEEK 7 Flashcards
What is potter syndrome?
Bilateral renal agenesis
- no kidneys present
- infant will be squashed
What is the Vesicoureteric reflux?
Valves from ureter into bladder, bladder refluxes back into ureter increasing risk of irritation and infection
What are examples of (i) primary (ii) secondary glomerular disease?
(i) Glomerulonephritis, glomerulonephrirides
(i) vascular, autoimmune e.g. SLE, amyloid, diabetes, acquired
In Goodpasture syndrome, crescents can be seen hostologically, what are these crescents?
Proliferation of parietal epithelium and inflammatory cells
What is goodpastures syndrome?
A type II hypersensitivity reaction of kidney failure
What type of infection if proliferative glomerulonephritis?
Type III hypersensivity reaction
What is the difference between nephrotic and nephritc?
Nephrotic syndrome
Nephritic = blood, pain, less proteinuria, oliguria
What are 2 other causes of proteinuria?
diabetes
amyloidosis
What is tubulointestinal disease?
Typically caused by drug hypersensitivity
How many mmHg in 1kPa?
7.5 mmHg
What are the normal values for (i) pH (ii) pO2 (iii) pCO2 (iv) bicarb (standard)
(i) 7.35 - 7.45
(ii) 12-13 kPa
(iii) 4.5 - 5.6 kPa
(iv) 22-26 mmol/L
How is standard bicarb calculated? What does it reflect?
From the actual bicarb assuming 37 degrees celsius and a pCO2 of 5.3 kPa
- reflects the metabolic component of acid base balance
What does a P/F ratio of (i) greater than 50 (ii) less than 40 (iii) less than 26.7?
(i) healthy
(ii) acute lung injury
(iii) ARDS
What is compensation?
altering in fucntion of the resp or renal system to change the secondary variable in an attempt to minimise an acid-base imbalance
What are the 4 steps to the assessment of ABGs?
- Asses pO2 and oxygenation
- assess pH
- determine primary problem (think about pt)
- is compensation occurring?
If pH and pCO2 are changing in the SAME direction what does this suggest?
That the primary problem is metabolic
If pH and pCO2 are changing in OPPOSITE directions what does this suggest?
That the primary problem is respiratory
What does it suggest if pCO2 and bicarb are moving in the (i) same (ii) opposite direction?
(i) compensation likely to be occurring
(ii) suspect a mixed disorder
What is the anion gap?
It is calculated from venous blood
- it is the sum of routinely measured cations in venous blood minus routinely measured ions (sodium + potassium) - (chlorine + bicarb)
What use is the anion gap?
- an increased anion gap signals the presence of a metabolic acidosis
- helps differentiate the cause of a metabolic acidosis
What is the value of the normal anion gap?
16
What are the 3 reasons that metabolic problems most commonly occur from?
From an overwhelming acid load
- bodies own production
- ingestion (exogenous source)
- failure of excretion by the kidneys
How does the bodies own production of acid cause metabolic problems?
Any condition causing hypoperfusion
- of the whole body = shock
- of part of body = femoral artery embolism
this will result in increased anaerobic metabolism with subsequent increased production of lactic acid (lactic acidosis)
What are 3 other causes of lactic acidosis?
- severe acute hypoxia
- severe convulsions (respiratory arrest)
- strenuous exercise (dehydration)