1: Infections of the kidney (cystitis, acute pyelonephritis, urethral syndrome) Flashcards
How are UTIs classified
- Upper or lower UTI
2. Simple or complicated UTI
How are UTIs classified
- Upper or lower UTI
2. Simple or complicated UTI
What counts as upper urinary tract
- Kidneys
- Ureters
What is infection of the upper urinary tract called
Pyelonephritis
What is classed as lower urinary tract
- Bladder
- Urethra
- Prostate in males
What is infection of the bladder
Cystitis
What is infection of the urethra
Urethritis
What population is a simple UTI
Non-pregnant pre-menopausal Immunocompetent women
Who is classified as a complicated UTI
- Males
- Post-menopausal females
- Immunocompromised
- Diabetes
- Pregnant
- Anatomical abnormalities of the urinary tract
- Recent history instrumentation
What counts as upper urinary tract
- Kidneys
- Ureters
What is infection of the upper urinary tract called
Pyelonephritis
What is classed as lower urinary tract
- Bladder
- Urethra
- Prostate in males
What is infection of the bladder
Cystitis
What is infection of the urethra
Urethritis
What population is a simple UTI
Non-pregnant pre-menopausal Immunocompetent women
Who is classified as a complicated UTI
- Males
- Post-menopausal females
- Immunocompromised
- Diabetes
- Pregnant
- Anatomical abnormalities of the urinary tract
- Recent history instrumentation
What is acute pyelonephritis
Inflammation kidney
What causes 90% of pyelonephritis
E.coli
What are two rare causes of pyelonephritis
- Pseudomonas
- Klebsiella
In which gender is pyelonephritis more common and why
Females - due to shorter urethra meaning a shorter distance to travel
What are 4 risk factor categories for pyelonephritis
- Increase bacteria
- Increase binding
- Decrease urinary flow
- Increase bacterial growth
What 4 factors increase bacterial inoculation
- Sexual activity
- Urinary incontinence
- Faecal inconitnence
- Constipation
What increases binding of uropathogenic bacteria
Spermicide
Low oestrogen: menopause
What decreases urinary flow
Urinary tract obstruction
Dehydration
What increase bacterial growth
DM Pregnancy Immunocompromised Obstruction Renal tract malformation
How does pyelonephritis present clinically
- Flank pain
- Haematuria
- Rigors
- Vomiting
- Symptoms of cystitis
What is found on examination in pyelonephritis
- Tenderness over costa-vertebral angle
How can pyelonephritis occur
- Ascending infection
- Haematogenously
What investigations are ordered in suspected pyelonephritis
Urinalysis
MC+S
FBC, U+E, CRP, BC
USS
What will be seen on urinalysis
leucocytes
nitrites
haematuria
What will be found on MSU culture
WCC >10(^5)
How will FBC present in pyelonephritis
Leucocytosis
How will CRP present in pyelonephritis
Raised
What % of individuals with pyelonephritis have a positive blood culture
10-20
What imaging is ordered in pyelonephritis
USS
When are individuals with pyelonephritis admitted to hospital
Severe
Indicators of systemic illness (eg. sepsis)
How are non-pregnant women, men or those with an indwelling catheter managed for pyelonephritis
7-10d Cefalexin
Co-amoxiclav, Trimethoprim and Ciprofloxacin are all alternatives
How are pregnant women with pyelonephritis managed
Cefalexin 7-10d
What are 4 complications of acute pyelonephritis
- Chronic pyelonephritis
- Perinephric abscess
- ESRD
- Renal abscess
When does chronic pyelonephritis occur
Due to recurrent acute pyelonephritis
What is cystitis
inflammation of the bladder
how is cystitis divided
- Complicated UTI
- Uncomplicated UTI
what is a uncomplicated UTI
Normal urinary tract function and structure
what is a complicated UTI
- Male
- Pregnant women
- Structural abnormalities urinary tract: stones, congenital anomalies, renal transplant
in which gender is cystitis more common and why
Females- due to a shorter urethra
what causes 80% of cystitis
E. coli
what indicates cystitis due to proteus mirabilis
Alkaline urine
As proteus mirabilis produces urease causing ammonia smell
how does cystitis present clinically
- Urinary frequency
- Urgency
- Dysuria
- Haematuria
- Supra-pubic pain
when is investigation not required for UTI
Non-pregnant female under 65-years with more than 3-symptoms of UTI
when is urinalysis indicated for UTI
Non-pregnant female under 65 years with less than 3 symptoms
when should urinalysis not be used to diagnose UTI
Male
Pregnant
Children
what is present in urinalysis in UTI
Haematuria
Leucocytes
Nitrites
what finding on urinalysis indicates proteus mirabilis is causing infection
pH >7
Due to proteus mirabilis producing ammonia which increases urinary pH
what is second-line (in some) and first line (in others investigation for UTI
MSU
what MSU indicates UTI
> 10 (^5)
when is USS indicated for cystitis
- Recurrent (more than 2 a year)
- Atypical organism
- Persistent haematuria despite treatment
- Failure to respond to treatment
How is uncomplicated UTI managed
3-days nitrofurantoin
What is a CI to nitrofurantoin use
eGFR <45
If nitrofurantoin cannot be used what is used
trimethoprim
what is used for complicated UTI
7days nitrofurantoin
explain antibiotics for UTI in pregnant women
- Trimethoprim is anti-folate so can’t be used in first trimester
- Nitrofurantoin cannot be used in third trimester
- Amoxicillin generally preferred
what are two complications of cystitis
- Acute pyelonephritis
- Prostatitis
what are two complications of UTI in pre-term
IUGR
Pre-term delivery
what is prostatitis
Ascending infection infiltrates the prostate gland
what are four risk factors for prostatitis
- UTI
- Recent biopsy
- Instrumentration
- Recurrent catheterisation
what are symptoms of prostatitis
- Obstructive symptoms
- Pain referred to perineum
- Fevers
how will DRE present in prostatitis
Tender, boggy prostate
what should be screened for in prostatitis
STI
how is prostatitis managed
14d Fluroquinolones
define asymptomatic bacteria
presence >10(^5) bacteria in urine
when is asymptomatic bacteruria screened for
screened for in pregnancy due to risk of pre-mature delivery
what is urethral syndrome
symptomatic abacteruria
what causes sterile pyuria
- GU TB
- Urethritis (Chalmydia)
- Renal stones
- Appendicitis
- Cancer
- ADPKD