Microvascular Flashcards
What percentage of diabetics with kidney fxn impairment do NOT have albuminuria? Ie: not caused by diabetes?
50% approx.
Why is urine albumin alone not sufficient for monitoring for renal disease?
Approx 50% of renal disease in diabetic pts is not caused by diabetes.
Should also test
EGFR and urinalysis.
When should screening for CKD start for type one and type 2 patients?
Type two screen at diagnosis.
Type one start at 5 years past diagnosis. EVEN IN KIDS!!!
What conditions can cause a transient rise in albuminuria? Ie: shouldnt screen at that time.
Recent major exercise. UTI Febrile illness CHF Menstruation Acute severe increase in glucose Acute severe increase in BP
When should eGFR not be used to diagnose CKD
If it is a transient decrease. Should be a persistent reduction.
Dehydration or intracellular fluid contraction can cause transient decline
When should a pt with CKD be promptly referred to a specialist?
Rapidly declining eGFR
development of severe HTN
ACr > 60
EGFR 30 % rise in SCr within starting ACE or ARB
Unable to remain on ACE or ARB due to ADRs or hyperkalemia
What is the screening for CKD and what is needed for diagnosis?
EGFR and ACr YEARLY
Abnormal test should be repeated within 3 months. If 2/3 ACr are abnormal then diagnosis is confirmed. UNLESS. ACr is in overt category. Ie: >20. No confirmation necessary.
Once diagnosed, a urine dipstick and microscopy should be ordered. If no abnormalities other than proteinuria then can presumptively make dx of CKD due to diabetes.
When a pt with diabetes and CKD has reduced oral intake or has vomitting or diarrhea Ie: dehydrating, what meds should be stopped?
S. Sulfonylurea A. ACE D. Diuretics M. Metformin A. ARB N. NSAIDS S. SGLT2
What are the ACr levels for microalbuminuria and overt nephropathy?
2-20 mg/mmol
> 20
What pt info is needed to calculate MDRD eGFR?
Age
Sex
Race
SCr
What factors would favour an alternate diagnosis of non diabetic renal disease?
Extreme proteinuria. (>6g/day} Rapidly falling eGFR Persistent hematuria Low eGFR with little or no proteinuria Other complications of D not present Known duration of D < 5 years Family hx of non D renal disease S/S of systemic disease
When should eGFR and SCr be checked after starting an ACE or ARB?
Within 1-2 weeks of starting and during times of acute illness.
When should you start screening for retinopathy?
Type 2 at diagnosis.
Type 1 five years after diagnosis in all people age 15 and older
How often should screening for retinopathy be done?
Yearly for type 1
Every 1-2 years for type 2
What are the risk factors for diabetic retinopathy?
Pregnancy for type one Longer duration of D High a1c High BP Dyslipidemia *independant risk factor for hard exudates!!! Low hemoglobin Proteinuria
What percentage of diabetics will demonstrate signs of kidney disease in their lifetime?
50%
Diabetic retinopathy is the most common cause of legal blindness in People of working age.
What percentage of adults with diabetes have retinopathy?
40%