Renal Flashcards
What is the only protein found in the urine
Tam horsfall
- Secreted by thick loop
Nervous control of urine storage
Sympathetic - Hypogastric nerve
Nervous control of voiding urine
Parasympathetic - Pelvic nerve
Nervous control of voluntary urine passage
Pudendal nerve
Criteria for AKI diagnosis
Rise in creatnine >26mincrmol/L in 48hrs
Rise in creatnine > 1.5x baseline in 7 days
Decreased urine output <0.5ml/kg/h for 6hrs
AKI risk factors
Age > 65 pre existing CKD DM HF Dehydration
AKI
- Pre renal causes?
ARB/ACEi NSAIDs Anaphalaxis Sepsis CCF Trauma
AKI
- Renal causes?
Glomerulonephritis - SLE / Infection
Vasculitis - SLE
HTN
Acute tubular necrosis
AKI
- Post renal
Stone
stricture
BPH
Pelvic malignancy
Causes of acute tubular necorsis
Gentamicin NSAIDs ACEi Pancreatitis MI Diuretics
AKI signs and sx
sx
- oliguria
- vomitting
- nausea
- weakness
signs
- tachycardia
- breathlesness
- arrhythmias
- hypocalcaemia
- dehydration
AKI investigations
- Bloods
- Urinalysis
- Rectal US - post renal obstruction
AKI tx
Pre - fluids
renal - stop nephrotoxic drug
post - catheter
AKI complications
- Hyperkalaemia
- Acute pulmonary oedema
- Metabollic acidosis
Hyperkalaemia ECG findings
Tall tented t waves
no p waves
Wide QRS complex
What is BPH
Non cancerous growth of prostate gland
Transitional zone enlargement
BPH presentation
SHED
FUND
Haematuria
Overflow incontinence
How to spot metabollic acidosis
Kussmauls breathing
BPH investigations
PSA Urinalysis - dipstick - MSU DRE Rectal Ultrasound + biopsy
BPH management - lifestyle
Avoid caffine / alcohol
relax when voiding
bladder training
BPH medications
1st - Tamsulosin
2nd - Finasteride
3rd - surgery
Tamsulosin S/E
Postural hypotension
Dizziness
Dry mouth
Ejacualtory failure
Finasteride S/E
Impotence
decreased libido
Transurethral resection of prostate complications
bleeding
infection
erectiel dysfunction
urethral strictures
CKD causes
- primary
- secondary
Primary
- Minimal change disease
- UTI
- Pyelonephritis
- stones
Secondary
- HTN
- DM
- Amyloidosis
- HF
- Sarcoidosis
CKD classification stages
1 - > 90 2 - 60- 89 3a - 59 - 45 3b - 44 - 30 4 - 29 - 15 5 - <15
CKD Presentation
Protein loss and Na+ retention
- Polyuria
- nocturia
- oliguria
- S.O.B
- peripheral oedema
Uraemia
- Pruritus
- weightloss
- paraesthsia
- confusion
CKD Signs
Anaemia
Hypertension
Bone disease - osteomalacia
Pruritus
CKD tx
Treat complications
- EPO
- Vit D
- Loop diuretics for oedema
BP control - ACEi
Glycaemic control
Renal replacemnt therapy
Reduce CVS risk - statins
CKD complications
Anaemia Bone disease - osteoperosis Peripheral neuropathy MI/Stroke Pericarditis - uraemia Pericardial effusion - uraemia
CKD investigations
- Bloods
- Urinalysis
A:C > 3mg/mmol
Dipstick - Haematuria - US
Small kidneys
CKD Management
Conservative
- excercise/ diet / weight control
- stop smoking
Medical
- Optomise DM and HTN control
- dialysis
Surgical
- transplant
Why does metabollic acidosis occur in CKD and tx
Decreased H+ secretion and HCO3- reabsorption
Tx - sodium bicarbonate
Main cause of Cystitis infection
E coli
Cystitis presentation
cloudy urine haematuria suprapubic pain urgency dysuria frequency abdo tenderness
Cystitis investigations
Urine dipstick
MSU sample
- MC&S
Cystitiis tx
1st - Trimethorpim
2nd - Co-amoxiclav
Prostatitis presentation
fever malaise voiding luts - SHED pelvic pain perianal oain pain on ejacualtion
prostatitis investigations
Dipstick
- lecoytes + nitrites positive
DRE - tender and hot
MSU - MC&S
STI screen
Prostatitis tx
1st - Gentamicin + co-amoxiclav
2nd - Trimethoprim
Nephritic syndrome features
Oedema HTN Proteinuria Haematuria - red cell casts Oliguria
Nephritic syndrome causes
ANCA positive vasculitis SLE Post strep glomerulonephritis IgA nephropathy Anti-GBM disease (Good pasture's disease)
Nephritic syndrome presentation
Haematuria Sterile pyuria HTN Oedema Oliguria Uraemia - pruritus - lethargy
Nephritic syndrome Ix
Dipstick - protein/hamaturia
Urine - MC&S
- RBC casts
- Bence jones proteins
Bloods
Renal biopsy
Nephritic syndrome tx
Tx underlying cause
Reduce proteinuria
- ACEi/ARB
Common features of diseases causing glomerulonephritis
Haematuria Proteinuria Diagnosed on renal biopsy Can cause CKD Deteriorating kidney function
Minimal change disease
- common in
- observation on electron microscopy
- tx
Common in children
loss of large amounts of protein lost due to podocyte damage - fused podocytes
Tx - Prednisolone
IgA nephropathy
- Pathophysiology
- presentation
- tx
IgA deposition in mesangium
HTN
High creatnine
haematuria
proteinuria
BP control - ACEi
Nephrotic syndrome causes
- primary
Primary
- Focal glomerular sclerosis
- Minimal change disease
- Membranous nephropathy]
Nephrotic syndrome triad
Proteinuria - frothy urine Hypoalbuminaemia Oedema - - peripheral - periorbital - ascites
Hyperlipidaemia
Nephrotic syndrome causes - secodnary
DDANI D - DM D - Drugs (NSAIDs) A - AI - SLE N - Neoplasia - Myeloma I - Infection - Hep B/C
Nephrotic syndrome investigations
Bloods
- U+E
- Creatnine - elevated
- Increased clotting factors
- Hyperlipidaemia
- Hypoalbuminaemia
Urinalysis
- Proteinuria
- A:C ratio RAISED
Nephrotic syndrome differential dx
CCF
- oedema
- raised JVP
Cirrhosis
- hypoalbuminaemia
- Oedema
Nephrotic syndrome management
- High dose oral steroids
- Tx underlying cause
- Rampiril
Reduce proteinuria
Nephrotic syndrome symptomatic tx
Oedema
- furosemide
- fluid and salt restriction
Prophylactic LMWH
Simvastatin
Pneumococcal vaccinations
Nephrotic syndrome complications
Thromboembolism
Infection
- decreased IgG
- decreased compliment activity
Hyperlipidaemia
Why is someone with nephritic syndrome at risk of sepsis
Immunoglobulins lost in urine
What is prostate cancer
Peripheral zone prostate neoplasia - Adenocarcinoma
Risk factors for prostate cancer
Increasing age Black - increased testosterone Family hx Genetics - HOXB13 gene - BRCA2 gene
Location of metastatic spread of prostate cancer
Bone - sclerotic bone lesions
Lymph nodes
- para aortic
- inguinal
Prostate cancer presentation
SHED
FUND
Visiable haematuria
weight loss
Anaemia
Urinary retention - obstruction
Prostate cancer investigations
PSA
DRE
- nobbly
- hard irregular lump
Transrectal US + biopsy
Why must multiplebiopsies be taken in prostate cancer
Multi focal tumour
What grading is used in prostate cancer
Gleason grading
Radical tx complications of prostate cancer
erectile dysfunction
urianry incontinece
urethral strictures
Causes of increases PSA
BPE
Prostate cancer
UTI
Prostatitis
Organisms that cause pyelonephritis
E.coli - tranurethral
Klebsiella
Enterococcus
S.aureus - haemotogenous from IE
Pyelonephritis presentation
Loin pain + fever + Pyuria
- Loin to groin pain
- Dysuria
- Frequency
- Haematuria
- Vomitting
- Pain on palpation over kidney
Pyelonephritis Investigations
Urine dipstick MSU culture Bloods Imaging - Contrast enhanced CT
Pyelonephritis tx
Abx - Co-amoxiclav
Analgesia
Hydration
Blood + urinary cultures
What cells does renal cell carcinoma arise from
Proximal convoluted tubular epithelium
Renal cell carcinoma risk factors
Smoking Obesity Von hippel lindau syndrome Long term dialysis Leather tanners Asbestos
Renal cell carcinoma presentation
Haematuria + flank pain + mass
weight loss
night sweats
fatigue
Renal cell carcinoma investigations
Urinalysis
- Dipstick
- MSU
- Cytology
US - cyst or tumour
CT with contrast - Sensitive for mass detection
MRI - Staging
Bloods
Renal cell carcinoma metastases
Lung - Cannon ball mets
Bone
Renal cell carcinoma complications
- Left sided varicoceles
- IVC invasion
- Paraneoplastic syndromes
Renal cell carcinoma paraneoplastic syndromes
EPO –> Polycythaemia
Renin –> HTN
PTHrp –> Hypercalcaemia
ACTH –> Cushings
3 locations where a stone can lodge
Pelviureteric junction
pelvic brim
vesicoureteric junction
types of stone
Calcium oxalate calcium phosphate struvite uric acid cystine
what are the 2 stone forming inhibitors
citrate
mg
Stone composition
- calcium oxalate
High dietary oxalate intake
- tea
- rhubarb
- spinach
chronic intestinal malabsorption - chrons
Primary hyperoxaluria
Stone composition
- calcium phosphate
Hyperparathyroidism
excess Ca2+ intake
PCKD
Stone composition
- struvite
Magnesium
Ammonium
Assosciation with UTIs
Renal colic presentation - sx
Loin to groin pain - stabbing
nausea
vomitting
sweating
Renal colic presentation - signs
can;t lie still nausea haematuria stranguary dysuria
How can you tell the difference between a bladder stone and a urethral stone
Bladder -
Increased urinary frequqency
Haematuria
Urethral
- bladder outflow obstruction
Anuria + painful bladder distension
Renal colic investigations
Urine dipstick - haematuria
MSU sample
- MC&S
- Measure electrolytes
Abdo X-ray
Non contrast CT - Dx
What is the diagnostic Ix for Renal colic
Non contrast CT
Renal colic tx
- Diclofenac
- fluids
- Tamsulosin
Stone composition
- uric acid
Hyperuricaemia
acidic urine
Prevention methods for recurrent stones
Hydration
normal dietary calcium
Thiazide diuretic - reduces urine calcium levels
Uric acid stone preventiol
Allopurinal
Oxalate stone prevention
Pyridoxine
Scrotal disease
testicular + cystic
Hydrocele
Scrotal disease
Testicular + solid
Tumour
Orchititis
Haematocele
Scrotal disease
Separate + solid
Epididymitis
varicocle
Scrotal disease
Separate + cystic
Epididymal cyst
What is an epididymal cyst
- contains clear milky fluid
- soft lump
- fluctuance
- well defined
- transilluminate
What is a hydrocele
- transilluminate
- soft
- fluctuant
- Lies anterior and below testis
- due to patent proccesus vaginalis
- testis palpable
Which scrotal disease is associated with testicualr disease
Hydrocele
What is a varicocele
Abnormal dilatation of testicular veins in pampiniform plexus due to venous reflux
- Left sided more common
- Bag of worms
- dulla ache
- scrotum hangs lower on affected side
What is testicualr torsion
Urological emergency - twisting of spermatic cord leading to ischaemia and infarction
- Sudden onset testicualr pain
- Pain on walking
- pain during physical acitvity
- Testes - hot / tender / swollen
- abdo pain
- nausea
- vomitting
STI
- Organisms that cause discharge
- Chlamydia
- Gonorrhoea
STI -
- Organisms that cause genital ulcers
- Syphillis
- Herpes
STI investigations
- Nucleic acid amplification test
- MC&S
Male -
First void urine
Female -
Vaginal swabs
Management
- Chlamydia
- Gonorrhoea
- Syphillis
- Azithromycin
- Ceftriaxone
- Penicillin
Risk factors for testicular tumour
Undesecended testes
Testicualr tumour presentation
Painless lump in testicle Haemospermia Hydrocele Back pain Lymphadenopathy
Testicular tumour Ix
Scrotal US
- non tender
- no fluctuace
- no transillumination
Bloods
- Tumour markers
Tumour markers for testicualr cancer
Alpha fetoprotein - Raised in teratomas
Beta - hCG
Raised in both teratomas and seminomas
Transitional cell carcinoma investigations
Urinalysis
- MC&S
- Cytology
Fexible cystoscopy with biopsy
CT urogram - staging
Transitional cell carcinoma risk factors
- smoking
- Aromatic amines
- aldehydes
- family hx
- schistomiasis infection
Who is at risk of bladder cancer
hairdressers
painers
rubber industry
Transitional cell carcinoma presentation
Painless haematuria
frequency
urgency
dysuria
Transitional cell carcinoma tx
No muscular invasion - TURB
Muscle invasion
Radical cystectomy with ileal conduit
What is urgency incontinece
Sudden urge to void due to detrusor instability - Overactive bladder
Urge incontinence Tx
Bladder diary
- Bladder retraining
- Increase intervals between urination
- Cut out caffine and alcohol
- Severe - Oxybutynin
What is stress incontinence
Urine leakage with increases in abdominal pressure
- cough
- sneeze
- standing up
- laughing
What is overflow incontinence
Leakage of small amounts of urine - voiding issue
Causes of overflow incontience
BPH
Urethral stricture
Mass
Neurological causes of imcontinence
DM - Autonomic neuropathy causing decreased detrusor excitability Parkinsons Multiple sclerosis Prostatectomy Hysterectomy
Common organisms causing UTIs
E.Coli
Proteus mirabilis
Klebsiella pneumonia
Lower UTI presetation
Cloudy smelly urine Dysuria haematuria suprapubic pain frequency tenderness
Upper UTI presentation
Loin pain tenderness - costavertebral angle N+V Oliguria Fever Systemically unwell
UTI investigations
Urinalysis - dipstick
+ve = Emperical tx
-ve but pt has sx = MSU for MC&S
Bloods
Imaging
- bladder scan
- Renal US
Urinary tract obstruction investigations
Bloods
Urinalysis
Ultrasound
CT - hydronephrosis
What is polyuria
Partial blockage and loss of concetration mechanisms - Excess urination
What is anuria
Complete bilateral blockage - no urination
Upper urinary tract obstruction sx
Loin to groin pain
worse with fluids
Enlarged kidneys
4 complications of peritoneal dialysis
Infection
peri catheter leak
abdominal wall herniation
Intestinal perforation
Name 3 isotonic solutions
5% Dextrose
0.9% Sailine
Hartmans solution
Signs of ADPCKD
HTN haematuria polyuria abdo/loin pain palpable massess
ADPCKD tx
Treat HTN - Target = 130/80
Dialysis
Increase H20
Reduce salt
ARPCKD Assosciated mutation
PKHD1 - chromosome 6
PCKD complications
Mitral valve prolpase
Liver cysts
SAH
What classification helps differentiate between benign cystic lesions and cancerous cystic lesiosn
Bozniak classification
4 causes og haematuria
Kidney
- tumour
- trauma
- stones
- cysts
Urethral stones
Bladder
- Infection
- Stones
- Tumour
BPH
Prostate cancer
Trimethoprim MOA
Affects folic acid metabolism
Descibe the action of aldosterone
- Acts on the collecting ducts
- Increases ENaC and H+/K+ pumps
- Increases sodium absoprtion
- K+ secretion
- H20 retention
- BP rise
3 functions of ANP
Renal vasodialtor
Inhibits aldosterone
Closes ENaC - decreases Na+ reabsorption
3 factors stimulate renin release
Sympathetic stimualtion
Decreased BP
Macula densa cells
Function of calcitrol
Suppression of PTH (-ve feedback)
Increases Ca2+ and Phosphate absorption from the gut
How does PTH increases serum calcium levels - 3
- Increases bone resorption
- Increases Ca2+ reabsorption from the kidneys
- Stimulates alpha -1 hydroxylase activity so increases Ca2+ absorption from gut
which part of the loop of henle is water permeable
thick ascending limb
What is fanconi’s syndrome
Failure of nephron to reabsorb essential ions
Sugars / a.a. / bicarbonates appear in urine
2 signs of fanconi’s syndrome
Sugar in the urine
Acidosis
Rickets / osteomalacia
2 Causes of Fanconi’s syndrome
Myeloma
Cystinosis
Name a drug that inhibits creatinine secretion and its effects on eGFR
Trimethoprim
Increased eGFR
Equation for GFR
(Um X urine flow rate) / Pm.
- Um = concentration of marker substance in urine.
- Pm = concentration of marker substance in plasma.
What cancer does schistomiasis cause
SCC of bladder
What are LUTS sx in a male aged 50 likely to be
BPE
Describe tx for sepsis
Give high flow O2 Take blood cultures Give IV abx Give IV fluids Check lactate Monitor hourly urine output
How are urate stones visualised
Non contrast CT
Radiolucent