Hypertension, CKD & Hyperlipidaemia Flashcards
Define CKD
Reduction in kidney function or structural damage (or both) present for more than 3 months with associated health implications.
Discuss the prevelance & aetiology of CKD
State some risk factors/potential causes of CKD
- Hypertension
- Diabetes
- Glomerular disease e.g. glomerulonephritis
- Chronic pyelonephritis
- Current or previous history of AKI
- Nephrotoxic drugs
- Conditions associated with obstructive uropathy e.g. structural renal tract disease,recurrent urinary claliuli etc..
- Multisystem disease e.g. SLE, vasculitis, myeloma
- FH of CKD stage 5 or hereditary kidney disease e.g. autosomal dominant polycystic kidney disease
- Cardiovascular disease
- Obesity with metabolic syndrome
State some symptoms of CKD/discuss how CKD may present in primary care
Symptom often generalised and pts may be asymptomatic until a late stage; symptoms can include:
- Fatigue
- Pruritis
- Loss of appetite
- Nausea & vomitting
- Breathlessness
- Cramps (worse at night)
- Weight loss
- Polyuria
- Oedema
- Muscle weakness
- Taste disturbance (ESRD)
State some signs of CKD
- Pallor
- Cacehexia
- Uraemic odour (ammonia like smell of breath)
- Uraemic flap
- Tachypnoea
- Dehydration/hypovolaemia
- Hypertension (primary or secondary to CKD itself)
- Peripheral oedema
- Bibasal creptitations (if pulmonary oedema)
- Ballotable polycystic kidneys (in PKD)
- Hepatomegaly
- Jaundice
- Frothy urine
CKD is often asymptomatic in the early stages; true or false?
True
Discuss how CKD is diagnosed in primary care
CKD should be diagnosed in people with:
- Markers of kidney damage e.g. urinary ACR >3mg/mmol, urine sediment abnormalities, electrolyte and other abnormalities, abnormalities related to histology, structural abnormalities determined by imaging etc…
- A persistent reduction in renal function shown by a serum estimated GFR of < 60mL.min/1.73m2
Which pts would you arrange investigations for CKD in?
Arrange investigations to assess for CKD in people with:
- Risk factors for CKD
- Incidental finding of:
- Rasied serum creatinine
- eGFR <60mL/min/1.73m2
- Proteinuria (ACR >3mg/mmol)
- Persistent haematuria (2/3 dipstick show 1+ or more of blood)
- Urine sediment abnormalities e.g. red blood cells, whit blood cells, granualar casts
- Possible clinical features of CKD
Discuss what initial investigations you would do in primary care if you suspect CKD
- U&E’s & eGFR (advise person not to eat meat for 12hrs prior): chekc for raised creatinine and decreased eGFR
- Urine dipstick: check for heamturia
- Early morning urine sample: for ACR
- Blood pressure: CVD RF
- BMI:CVD RF
- Serum HbA1c: CVD RF
- Lipid profile:CVD RF
- Consider renal tract ultrasound
Discuss how CKD is classified
Classified using combination of eGFR and urinary albumin:creatinine ratio (ACR)
*NOTE: markers of kidney damage include albuminuria, urine sediment abnormalities, electrolyete & other abnormalities due to tubular disorders, abnormalities detected by histology, structural abnormalities detected by imaging or history of kindey trasnplantation
Remind yourself of the 5 aims of management in CKD (from Yr3 Medicine Renal: CKD)
- Treat underlying disease
- Reduce progression of CKD
- Reduce risk of cardiovascular disease
- Prevent or treat complications
- Plan for future
This involves:
- Blood pressure management
- Management dyslipidaemia
- Treating/optimising control of underlying cause
- Treating e.g. aneamia, CKD mineral & bone disease
Discuss the non-pharmacological mangement of CKD
- Provide sources of information, advice & support such as Kidney Care UK, leaflets on CKD etc…
-
Lifestyle measures:
- Smoking cessation
- Limiting alcohol consumption
- Weight loss if appropriate
- Healthy diet
- Regular exercise
- Ensure get influenza & pneumococcal vaccinations
- Advise to avoid OTC NSAIDs where possible
- Avoid herbal remedies
- Use protein supplements with caution
- Advise on increased risk of AKI if there is severe, intercurrent illness
Discuss the management of blood pressure in CKD, consider how management differs for:
- ACR <30mg/mmol
- ACR =/> 30mg/mmol and associated hypertension
- ACR =/> 70mg/mmol
- If have diabetes
- If ACR <30mg/mmol manage via usual hypertension pathway (lifestyle, consider drug therapy)
- If ACR of 30mg/mmol or more and associated hypertension prescribe ACE inhibitor or ARB e.g. lisinopril or losartan
- ACR =/> 70m/mmol prescribe ACE inhibitor or ARB irrespective of blood presussure or CVD risk
- If diabetic and have ACR >3mg/mmol or more prescribe ACE inhibitor or ARB
Blood pressure targets:
- ACR <70mg/mmol: systolic <140, diastolic <90
- ACR =/>70mg/mmol: systolic <130, diastolic <80
- If have diabetes mellitus: systolic <130, diastolic <80
*NOTE: if person has ACR of 70mg/mmol or more refer to nephrology unless proteinuria is known to be due to diabetes and is managed appropriately
Discuss the blood pressure targets in CKD, consiser if person has:
- ACR <70mg/mmol
- ACR =/>70mg/mmol
- Diabetes mellitus also
Blood pressure targets:
- ACR <70mg/mmol: systolic <140, diastolic <90
- ACR =/>70mg/mmol: systolic <130, diastolic <80
- If have diabetes mellitus: systolic <130, diastolic <80
*NOTE: if person has ACR of 70mg/mmol or more refer to nephrology unless proteinuria is known to be due to diabetes and is managed appropriately
Discuss the management of dyslipidaemia in CKD
For ALL people with CKD prescribe a statin:
- 20mg Atorvastatin for primary prevention
- 80mg Atorvastatin for secondary prevention
*NOTE: renal impairment is a risk factor for myopathy & rhabdomyolysis adverse effects of statins therefore for people with eGFR of 30mL/min/1.73m2 or less consider seeking specialist advice prior to commencing statin
Discuss the management of oedema in primary care
Loop diuretic e.g 40mg Furosemide
When are antiplatelets prescribed in CKD?
For secondary prevention of CVD e.g. prescribe aspirin
Discuss which pts with CKD you should refer to specialist
- eGFR <30mL/min/1.73m2
- Accelerated progression of CKD
- Urinary ACR of =/>70mg/mmol (unless proteinuria known to be associated with diabetes and is managed appropriately)
- Urinary ACR of =/>30mg/mmol together with persistent haematuria
- Hypertension that remains controlled despite use of 4 antihypertensive drugs at therapeutic doses
- Suspected or confirmed rare or genetic cause of CKD
- Suspected renal artery stenosis
- Complicatinos of CKD such as:
- Malnutrition, hyperkalaemia
- Anaemia of chronic disease
- Renal mineral & bone disease
- Persistent metabolic acidosis
What is ‘accelerated progression of CKD’?
Defined as:
- Sustained decrease in eGFR of 25% or more within 12 months and a change in CKD category
- Sustained decrease in eGFR of 15mL/min/1.73m2 or more within 12 months
Discuss what follow up/monitoring is required in CKD
- Monitor eGFR, serum creatinine, urinary ACR (see attached able for how often should be monitored- depends on disease severity.
- Check lipids annually
-
Monitor for complications
- FBC for anaemia in pts with CKD 3b, 4 and 5 or if develop symptoms of anaemia
- Ca, phosphate, vit D, PTH for pt with CKD 4 or 5 or if suspect bone disease
*Should monitor renal function estimate rate of progression. To estimate rate of progression measure eGFR at least 3 times over 3 months. Baseline eGFR and trajectory can help you determine if referral to specialist is necessary
Discuss the impact of CKD on someone’s life
- Inablity to do what they used to: work, exercise, look after family etc
- Medication
- Planning for future and impact of future treatments
- Anxiety and depression associated with chronic disease
State some complications of CKD
- AKI (this may initiate or accelerate CKD progression)
- Hypertension
- Dyslipidaemia
- Cardiovascular diseae e.g. IHD, peripheral arterial disease, heart failure, stroke
- Anaemia of chronic disease
- CKD mineral and bone disorder
- Malnutrition
- Malignancy
- ESRD
- Peripheral neuroahty & myopathy (may present as parasthesia, sleep disturbance, restless leg syndrome)
Discuss sick day rules for CKD patients
consider temporary cessation of medicines at times of acute illness.4 9 10 That is, during these episodes, ‘any drug that reduces blood pressure, circulating volume or renal blood flow’ increases the risk of AKI.3 Medicines that exacerbate this risk include non-steroidal anti-inflammatory drugs (NSAIDS), diuretics, ACE inhibitors and angiotensin II receptor blockers (ARBs).3
When you have an illness that can make you dehydrated for example: nausea, vomiting, diarrhoea, fever, you should stop taking the following medications as they further increase dehydration risk and therefore increase risk of AKI:
- Diuretics
- ACE inhibitors
- ARBs
- Metformin
- Diuretics
*Mneumonic: DAAMN
Restart medications when you are well (24-48hrs after eating & drinking normally).
Advice does not apply if single episode of diarrhoea or vomiting. If have heart failure only withhold for 48hr then seek specialist advice.
When should you suspect renal artery stenosis?
- Greater than 25% reduction in eGFR within 3 months of starting (or increasing dose of) a renin-angiotension system antagonist
- Refractory hypertension
- Pulmonary oedema
- Renal artery bruit
How long, after an AKI, should you monitor for the development or progression of CKD?
Monitor for development or progression of CKD for at least 2-3yrs after episode of AKI even if serum creatinine returned to normal
How can we prevent risk of AKIs?
- Discuss risk of developing AKI with pt and educate on risk factors e.g. nausea & vomitting
- Review drugs and where possible avoid nephrotoxic drugs
- Sick day rules CKD
Define hypertension
Persistently raised arterial BP (>140/90)
- Primary: idioapathic
- Secondary: due to underlying cuase
Discuss the prevelance of HTN
- 31% in menand 26% in women but rises to>50% in aged over 60yrs
- Estimated that for every 10 people diagnosed with HTN, 7 remain undiagnosed
- Globally 25% of adults have HTN worldwide
State some risk factors for HTN
- Age
- Sex (up to 65yrs women tend to have lower BP than men. Between 65 and 74yrs women tend to have higher BP than men)
- Ethnicity (black african & black carribean)
- Genetics
- Social deprivation
- Smoking
- Excessive alcohol consumption
- Excess dietary salt
- Lack of physical activity
- Obesity
- Anixiety & emotional stress (can raise BP due ot increased adrenaline & cortisol)
State some causes of secondary hypertension
- Renal disorders (MOST COMMON):
- Chronic pyelonephritis
- Diabetic nephropathy
- Glomerulonephritis
- PKD
- Obstructive uropathy
- Renal cell carcinoma
- Vascular disorders:
- Coarctation of aorta
- Renal artery stenosis
- Endocrine disorders:
- Primary hyperaldosteronism
- Phaeochromocytoma
- Cushing’s syndrome
- Acromegaly
- Hypothyroidism
- Hyperthyroidism
- Drugs & other substances (NOT ALL LISTED):
- Alcohol
- Corticosteroids
- EPO
- COCP
- Cocaine
- NSAIDS
- Other conditions:
- Scleroderma
- SLE
- OSA