Urogen Lectures Flashcards
What is the definition of Chronic Kidney Disease CKD?
where you have an irreversible loss of the nephron. (loss of function)
What is staging like for CKD?
You use GFR levels and Albumin levels in the urine
Albumin should not be in urine but sometimes it goes from blood to urine when there is something wrong
When should a patient go on dialysis?
When GFR is less than 15
AEIOU
Acidosis- is a process causing increased acidity in the blood and other body tissues
electrolyte balance- hyperkalemia
intoxication
overload with fluid
uremic symptoms- percarditis and platelet dysfunction
What causes CKD?
AKI
Hypertension
Diabetes
Glomeluarenephritis
Polycystic Kidney disease
How can hypertension cause CKD?
- Thickening of blood vessels
- narrowing of lumen
- less blood flow to kidneys (afferent arteriole)
- decrease is filteration
- so decrease in GFR
- cells in the glomerulus detect this and release renin
- stimulate RAAS system
- further hypotension/thickening/narrowing
- leads to glomerulosclerosis
- which leads to ischaemic injury
=loss of nephron
What the four changes that happen in the BC/glomerulus?
Mesangial expansion and proliferation,
podocytopathy
Glomerular basement thickening and sclerosis
Explain diabetic neuropathy?
Glucose in the start sticking to the protein in the efferent arteriole. And causes it to get stiff and narrower (hyaline arteriosclerosis). This creates an obstruction that makes it difficult for the blood to leave the glomerulus and increase pressure within the glomerulus leading to hyperfiltration. Mesangial cells therefore secrete more structural matrix which expands the size of the glomerulus. Over many years, this process of glomerulosclerosis, once again, diminishes the nephron’s ability to filter the blood and leads to CKD
Markers of CKD
Markers of CKD
- Reduction in GFR
- Urine
- Dipstix – Blood, Protein
- Protein estimation – ACR, 24 Hour urine
- Microscopy - casts
• Electrolyte abnormalities
-Tubular disorders – Gitelman’s syndrome
- Abnormalities detected by histology
- Scan of kidneys
- Small kidneys, Polycystic kidneys, Hydronephrosis
Investigation to asses renal impairment
Urinalysis
Complete blood count
Electrolyte level test
Blood urea nitrogen test
Creatinine test
Parathyroid hormone (PTH) test
Renal ultrasound
Symptoms of CKD
- weight loss and poor appetite.
- swollen ankles, feet or hands – as a result of water retention (oedema)
- shortness of breath.
- tiredness.
- blood in your pee (urine)
- an increased need to pee – particularly at night.
- difficulty sleeping (insomnia)
- itchy skin.
It is well known that patients with chronic kidney disease (CKD) have a strong risk of _____________ _______
cardiovascular disease(CVD).
General principles of management of CKD
- life style change, weight loss, smoking cessation
- tight BP & DM control
- in patients with Proteinuria RAAS Blockade (+Sodium-Glucose Co-Transporter 2 inhibitors (SGLT2i)
- Statins
What is AKI?
Acute kidney injury is defined as an abrupt (within 48 hours) reduction in kidney function based on an elevation in serum creatinine level, a reduction in urine output, the need for renal replacement therapy (dialysis), or a combination of these factors. It is classified in three stages. Reversible
What staging is used for AKI?
Serum creatinine levels
urine output
What are the causes of Pre renal AKI?
: renal artery stenosis (narrowing of the spaces which increases pressure), heart failure and haemorrhage
What are the intra renal causes of AKI?
Glomerulonephritis, Tubular necrosis, interstitial nephritis, vasculitis/macroangiopathic haemolytic anaemia
What are the post renal causes of AKI?
: Benign prostatic hyperplasia and tumour
obstruction
Pathophysiology of Acute tubular necrosis
Damage and death of the epithelial cells of the renal tubules
most common cause of AKI
the damage is due to ischaemia or toxins
the epithelial cells are replaced so that is why it is reversible.
Things like renal hyporperfusion and nephrotoxic medications (like aminoglycosides, chemotherapies, myoglobin) can lead to ATN.
Decreased renal perfusion can be related to reduced circulating volume (e.g. hypovolaemia), reduced cardiac output (e.g. cardiac failure), systemic vasodilatation (e.g. sepsis) or arteriolar changes (e.g. secondary to ACE-inhibitor or NSAID use).
Clinical features of AKI
Asymptomatic
but severe patients may be symptomatic like confusion, fatigue, anorexia, nausea, vomiting, weight gain, or oedema
Investigation for AKi
Serum creatinine level
Urinalysis
Urine electrolytes
Imaging studies- Renal ultrasonography
Renal biopsy
What is the purpose of dialysis?
excretion of metabolic waste products and foreign chemicals. It also gives us any solutes/fluid that we are lacking. Regulates water and electrolyte balance as well as acid base balance.
What are the two types of dialysis?
Haemodialysis and peritoneal dialysis
What is the difference between haemodialysis and peritoneal dialysis
Haemodialysis is a way of replacing some of the functions of your kidney by using a machine to filter and clean your blood. Blood is pumped out of your body to the machine where it is passed through a series of tiny tubes, in an ‘artificial kidney’ or ‘hemodialyzer’. Changes to your diet will be needed
Peritoneal Dialysis: blood is cleaned through a lining inside your abdomen (specifically your peritoneum). So you put a tube near the belly button into the peritoneum and insert a solution called dialysate solution and leave it for a few hours. The solution diffuses out the waste products out of your blood. The tube is then drained and the process starts again.
What are the types of the peritoneal dialysis? explain them?
Continuous ambulatory peritoneal dialysis (capd)- 4 exchanges you perform yourself everyday using bags of dialysis fluid. You move around with the bag.
Automated peritoneal dialysis- a machine does the exchanged for you at night just before you go to bed. You might have some fluid in your body during the day but you are free to move.
What is the basic mechanism of diaylsis?
Through diffusion/osmoisis
Blood is pumped around an extracorporeal circuit and through a semipermeable membrane (dialyser) before being returned to the circulation. In the dialyser dialysate flowing in the opposite direction is in close contact with blood. Small solutes (but not cells and larger-molecular-weight proteins) can cross the membrane, and move by diffusion down a concentration gradient. A trans membrane pressure allows controlled fluid removal by ultrafiltration (and with fluid, more solute removal by convection
What are the indication of renal replacement therapy? (dialysis)
Less than GFR 15
Acidiosis
Intoxication
Overload with fluid
Electrolyte balance
Uraemic symtoms
Key principles of Kidney Transplantation
When you have a transplant, it is important to:
- Reduce your risk for heart and blood vessel disease.
- Manage high blood pressure, diabetes, high cholesterol.
- Maintain a healthy weight.
- Keep a healthy red blood cell count.
- Reduce your risk for cancer and infection.
- Take your immunosuppressant medications as prescribed
Compare and contrast each RRT method
What does kidney injury have a strong link to?
CVS disease
Kidney Cancer
Incidence:
Risk Factors:
Age;
Sex:
Geographical Distribution:
Incidence: 7th most common
Risk Factors:
- Smoking. Smoking increases the risk of developing renal cell carcinoma (RCC). …
- Obesity. People who are very overweight have a higher risk of developing RCC. …
- High blood pressure. …
- Family history of kidney cancer. …
- Thyroid cancer
- Chronic renal failure and dialysis
- Gender. …
- Race. …
- Certain medicines.
Age: highest in people aged 90+
Sex: - 38% of kidney cancer deaths in the UK are in females, and 62% are in males
Geographical Distribution:
Bladder Cancer
Incidence:
Risk Factors:
Age;
Sex:
Geographical Distribution:
Incidence: 10th most common
Risk Factors:
- Smoking. Smoking is the most important risk factor for bladder cancer. …
- Workplace exposures. Certain industrial chemicals like dye industry people, painters, gas workers, hairdressers and rubber industry people
- Certain medicines or herbal supplements. …
- Arsenic in drinking water. …
- Not drinking enough fluids. …
- Race and ethnicity. …
- Age. …
- Gender
Age: Age-specific mortality rates rise steeply (more so in males) from around age 55-59.
Sex: White males and females more likely to get it. 32% of bladder cancer deaths in the UK are in females, and 68% are in males
Geographical Distribution:
How does staging work with cancer?
- Tumor (T): How large is the primary tumor? Where is it located? TX, T0, T1-4
- Node (N): Has the tumor spread to the lymph nodes? If so, where and how many? NX, N0-3
- Metastasis (M): Has the cancer spread to other parts of the body? If so, where and how much? M0,M1
Prostrate Cancer
Incidence:
Common Presentations:
Risk Factors:
Incidence: in 8 men will be diagnosed with prostate cancer in their lifetime
Common Presentations:
- A painful or burning sensation during urination or ejaculation.
- Frequent urination, particularly at night.
- Difficulty stopping or starting urination.
- Sudden erectile dysfunction.
- Blood in urine or semen.
Risk Factors:
- Old Age
- Obesity
- Race
- North American or northern European location. …
- Family history. …
- Hereditary breast and ovarian cancer (HBOC) syndrome. …
- Other genetic changes. …
- Agent Orange exposure. …
- Eating habits (high fat low fibre)
What is the importance of Prostate specific antigen PSA?
The PSA test is a blood test used primarily to screen for prostate cancer. The test measures the amount of prostate-specific antigen (PSA) in your blood. PSA is a protein produced by both cancerous and noncancerous tissue in the prostate, a small gland that sits below the bladder in men
When you have prostrate cancer there is an elevation of PSA.
What genes are linked to prostrate cancer?
Mutations in two genes
Genes BRCA1 on chromosome 17 and BRCA2 on chromosome 13