Random Flashcards
Why is ferritin high in anaemia of chronic disease?
Ferritin is elevated in its capacity as an Acute Phase Protein (APP) NOT due to it’s iron storing capacity. It is elevated in anaemia of chronic disease as an inflammatory APP and not a marker of iron overload.
Ferritin = protein which stores iron. Amount of ferritin correlates with the amount of iron stored in the body.
If you have a patient with suspected IDA, then when testing ferritin, have to make sure they do not have an infection as would read a false negative due to ferritins role as an APP.
When could you get a false negative when testing for IDA?
If the patient has an infection. Ferritin will be high in inflammation due to its role as an APP. (In IDA, ferritin is low).
What is ferroportin?
A transmembrane protein that transfers iron from inside the cell to outside the cell.
What is ferritin?
Ferritin is a protein which stores iron and releases it in a controlled fashion.
Low iron in IDA
High iron in iron overload.
Ferritin is also an APP
What is transferrin?
Transferrin binds iron and transports it throughout the body.
We see and increase in Transferrin in IDA reflecting and increase in transferrin protein expression.
What is TIBC?
Total Iron Binding Capacity
It represents the bloods capacity to bind iron with transferrin.
TIBC increases in IDA
What is transferrin saturation?
Value of serum iron/ TIBC in %
In IDA, trasferrin saturation decreases. (there is a decrease in volume of iron and an increase in the total iron binding capacity)
What are the general causes of IDA?
Chronic blood loss
Malabsorption
Increased demand (pregnancy)
What is the triad seen in Plummer Vinson syndrome?
IDA, post-cricoid dysphagia, upper oesophageal webs
Increased risk for oesophageal SCC and glossitis
What murmur do you hear in mitral or tricuspid IE?
Holosystolic murmur
What murmur do you hear in IE of the aortic valve?
Early diastolic murmur
When can you get false negative blood cultures in the diagnosis of IE?
- Recent AB use
2. Fastidious bacteria (Coxiella, Bartonella - they require complex nutrition in order to be cultured)
What ABs do you add to the normal regime in a patient with IE with prosthetic valve?
Gentamycin and Rifampin
Non prosthesis: Vancomycin + Beta-lactam
(Prosthesis: Vancomycin + Beta-lactam + Gentamycin + Rifampin).
What drugs do you use in VRE?
Linezolid + Tigecycline
What drugs do you use in ESBL?
Meropenem/ Imipenem + Cilastin