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Gen Med Unit 5 > UTI/IC/Acute Pyelonephritis > Flashcards

UTI/IC/Acute Pyelonephritis Flashcards

1
Q

Define Uncomplicated acute cystitis

A

An uncomplicated UTI in a premenopausal, nonpregnant woman with no known urologic abnormalities or comorbidities

Infection of bladder

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2
Q

What is the most common causative agent for acute cystitis? How does it infect the body?

A
  1. E. Coli (86%)
    - Also caused by: enterobacter: proteus mirabilis, klebsiella pneumoniae, staphylococcus saprophyticus
  2. Route of infection is typically ascending from urethra (95%), hematogenous spread from bacteremia (5%)
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3
Q

What is the most common bacterial infection in women? Why?

A
  1. Acute cystitis (UTI)
    A. Shorter urethra
    B. Females lack antibacterial action of prostatic secretions
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4
Q

Who is at a higher risk of UTIs?

A

Sexually active women

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5
Q

What are the risk factors for complicated UTIs?

A

Diabetes
Pregnancy
Symptoms for seven or more days before seeking care
Hospital acquired infection
Renal failure
Urinary tract obstruction
Presence of an indwelling urethral catheter, stent, nephrostomy tube or urinary diversion
Recent urinary tract instrumentation
Functional or anatomic abnormality of the urinary tract
Renal transplantation
Immunosuppression

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6
Q

What are the pathogens that cause complicated UTIs?

A
  1. E. Coli
  2. Enterobacter:
    - Proteus mirabilis
    - Klebsiella pneumoniae
    - Staphylococcus saprophyticus
  3. Pseudomonas
  4. Serratia
  5. Providencia species
  6. Enterococci
  7. Staph aureus
  8. Fungi
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7
Q

What percentage of community acquired UTI’s are caused by E. coli?

A

86%

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8
Q

What percentage of hospital acquired (nosocomial) UTI’s are caused by E. coli?

A

50%

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9
Q

What percentage of hospital acquired UTIs are caused by Klebsiella, Proteus, Enterococcus, Serratia?

A

40%

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10
Q

What are some common hx symptoms for UTIs?

A 
1. Irritative voiding sx’s
Frequency, dysuria, urgency, low volume
2. Suprapubic discomfort
3. +/- Hematuria
4. Sx’s often postcoital
5. - Vaginal sx’s: itching, burning, discharge
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11
Q

What are common Physical exam signs for uti?

A
  1. Often unremarkable
  2. +/- Suprapubic tenderness
  3. Afebrile
  4. NO CVA tenderness
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12
Q

What are the urine dipstick results in UTIs?

A 
Urine dipstick: 
Alkaline pH
Nitrites
Leukocytes
\+/- blood
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13
Q

When is urine culture and sensitivity recommended?

A

Recommended for patients:

  1. With suspected acute pyelonephritis
  2. With symptoms that don’t resolve or recur 2-4 weeks after treatment
  3. Who present with atypical symptoms
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14
Q

What are the C & S results in a UTI?

A

Culture > 100,000 organisms/ml

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15
Q

Define Minimum Inhibitory Concentration (MIC)

A

Lowest concentration of an antimicrobial that will inhibit the visible growth of a microorganism after overnight incubation

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16
Q

What other DS may be performed for a UTI?

A
  1. UA w/micro: look for casts, crystals, etc.
  2. Renal/Bladder Ultrasound: look for stenosis and obstruction
  3. Renal CT scan: look for kidney stone
  4. Cystoscopy
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17
Q

What antibiotic tx is recommended for an uncomplicated UTI?

A 
1. trimethoprim 160 mg/sulfamethoxazole Bactrim (DS)
1 tab po bid x 3 days
2. ciprofloxacin/Cipro
250-500 mg po bid x 3 days
3. nitrofurantoin/Macrodantin (Macrobid)
100 mg po bid x 5-(7) days
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18
Q

What Urinary analgesic is recommended for an uncomplicated UTI?

A
  1. Phenazopyridine /Pyridium

Decreases burning and pressure

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19
Q

When should a UTI pt be referred to Urology?

A
  1. UTI persistence despite abx treatment
    -Sx’s should improve 48-72 hrs
    -Renal sono or CT
  2. Evidence of ureteral/kidney stones
  3. Evidence of hydronephrosis
  4. Recurrent UTI’s w/chronic urine incontinence
  5. Sx’s of urethral stenosis
  6. Recurrent cystitis
    d/t bacterial persistence
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20
Q

What are some preventative measures for UTIs?

A
  1. Increase fluid intake
  2. Empty bladder frequently
  3. Wipe properly
  4. Showers rather than baths
  5. Void after intercourse
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21
Q

When should prophylactic abx be considered? What tx should be used?

A
  1. If 3 or more postcoital bouts within 1 year
    - Nitrofurantoin (Macrodantin) 100 mg po prn as dir
    - trimethoprim/sulfamethazole (Bactrim) 80/400 mg po prn as dir
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22
Q

What abx are recommended for complicates UTIs?

A
  1. Fluoroquinolones
  2. Levofloxane
  3. Ciprofloxacin
  4. Ampicilin or amoxicilin if gram positive bacteria

Basically same meds are used for both complicated and uncomplicated UTIs, but the length of the abx treatment course differs

23
Q

Define Acute pyelonephritis

A

Infectious inflammatory disease involving the kidney parenchyma and renal pelvis

24
Q

How does the acute pyelonephritis infection usually enter the body?

A

Infection usually ascends from the lower urinary tract

25
Q

How does staph aureus enter the body to cause acute pyelonephritis?

A

Staph aureus is spread hematogenously

26
Q

Etiology of acute pyelonephritis

A 
1. F > M
A. Shorter urethra
B. Females lack antibacterial action of  prostatic secretions
2. Pregnant women > general female population
3. Patients w/ DM
A. Neurogenic bladder
4. Patients with renal disease
A. Compromised renal function
27
Q

What are the common infectious agents for acute pyelonephritis?

A 
1. Gram (-) Bacilli (>95% of cases)
A. E. coli 
B. Klebsiella
2. Gram (+) Cocci
A. Enterococcus
28
Q

What are the less common infectious agents for acute pyelonephritis?

A 
1. Gram (-)
A. Proteus
B. Pseudomonas  
2. Gram (+)
A. Staph aureus
29
Q

What is the pathophysiology of acute pyelonephritis?

A
  1. Infection spreads from bladder to ureters to kidneys
  2. Vesicoureteral reflux:
    Can occur from congenital weakness at junction of ureter and bladder
  3. Hematogenous spread (staph aureus)
  4. Instrumentation
    A. Catheterization B. cystoscopy
  5. Inability to empty bladder:
    Neurogenic bladder
  6. Urinary obstruction secondary to tumors, strictures or BPH
30
Q

What are the sxs of acute pyelonephritis?

A
  1. Fever with rigors
  2. Back pain
  3. +/- Irritative void sx’s
  4. Nocturia
  5. Hematuria
  6. N/V/D
  7. Tachycardia
  8. CVA tenderness
  9. Flank pain
31
Q

What special sxs may be seen in the elderly with acute pyelonephritis?

A

May exhibit GI or pulmonary symptoms rather than febrile illness

32
Q

What special sxs may be seen in children (<2) with acute pyelonephritis?

A

Fever, vomiting, vague abdominal pain

Failure to thrive

33
Q

What are the DS: U/A w/ micro results for acute pyelonephritis?

A
  1. Cloudy appearance
  2. Alkaline pH
  3. Pyuria, bacteriuria, hematuria
34
Q

What are the DS: Sediment results for acute pyelonephritis?

A

Many WBC’s, few RBC’s, few WBC casts

35
Q

What are the DS: Urine Culture results for acute pyelonephritis?

A

Cell Count > 100,000 organisms/ml

36
Q

What other DS tests are indicated for pyelonephritis?

A
  1. CBC with differential
  2. Blood Cx
  3. BMP (basic metabolic panel)
  4. Renal U/S
    If obstruction suspected
  5. Renal CT
    If stone or abscess suspected
37
Q

What complications result from acute pyelonephritis?

A
  1. Sepsis
  2. Chronic pyelonephritis
  3. Acute renal failure (ARF or AKI)
38
Q

when is hospitalization necessary for acute pyelonephritis?

A
  1. Sepsis
  2. Signs of urinary obstruction or significant underlying disease
  3. Inability to tolerate adequate oral (PO) fluids or medications
  4. Infants and children younger than 2 years with febrile UTI, presumed pyelonephritis
  5. All infants younger than 3 months
39
Q

What are the inpatient treatments for acute pyelonephritis?

A
  1. IV antibiotics until afebrile 24-48 hrs, then oral meds (total 14 days)
  2. Hydration
  3. Antipyretics
  4. Anti-emetics
    odansetron/Zofran
40
Q

What are the 1st line therapies for In-pt. Pyelonephritis?

A

First-line therapy (fluoroquinolone)
1. ciprofloxacin (Cipro) 400 mg IV q12h for 14d or
2. levofloxacin (Levaquin) 250 mg IV q24h for 10d or
3. levofloxacin (Levaquin) 750 mg IV q24h for 5d
All of the above can be administered with or without an aminoglycoside (except in pregnant patients)

41
Q

What are the second line therapies for in pt. pyelonephritis?

A

Second-line therapy (cephalosporins or penicillins)
1. ampicillin 1-2 g mg IV q6h or
2. ampicillin-sulbactam (Unasyn) 1.5 g IV q6h or
3. piperacillin-tazobactam (Zosyn) 3.375 g IV q6h or
4. ceftriaxone (Rocephin) 1 g IV q24h or
5. ceftazidime (Fortaz, Tazicef) 2 g IV q8h
All of the above can be administered with or without an aminoglycoside (except in pregnant patients)

42
Q

What aminoglycosides can be administered in acute pyelonephritis?

A
  1. gentamicin 3 mg/kg/day IV in 3 divided doses
    or
  2. tobramycin 3 mg/kg/day IV in 3 divided doses or
  3. amikacin 10 mg/kg/day IV/IM in 3 divided doses
43
Q

What are the out pt treatments for acute pyelonephritis?

A

Antibiotic therapy
#1-Fluoroquinolone (+/- ceftriaxone x 1)
ciprofloxacin (Cipro) 500 mg PO BID x 7d
levofloxacin (Levaquin) 750 mg 1 PO QD x 5-7d
#2- Others
amox/clavulanate(Augmentin) 875 mg PO BID x 14d + ceftriaxone 1 gm IM/IV x 1 dose
trimeth/sulfa(Bactrim DS) 1 PO BID x 14d (not in elderly due to nephrotoxicity risk) + ceftriaxone
Hydration
Fever control
Anti-emetic
-Ondansetron/Zofran

44
Q

What are the recommended therapies for pediatric pyelonephritis?

A 
1. Neonate 
Klebsiella
IV ampicillin + gentamicin 
2. 6 weeks-3 yrs
E. coli
IV ampicillin + gentamicin
3. 3-6yrs
E. coli, Proteus in older boys
Follow adult guidelines, but avoid fluoroquinolones
4. 6-11 yrs
E. Coli
Follow adult guidelines, but avoid fluoroquinolones
45
Q

What are the recommended therapies for pyelonephritis secondary to obstruction?

A
  1. Antibiotics less effective
  2. Surgery to relieve obstruction or correct anomaly
    - Vesicoureteral Reflux: Long term proph abx/surgery
    - TURP
    - Urethral dilation
    - Ureteroscopy w/J-stent placement
46
Q

Define interstitial cystitis/bladder pain syndrome

A

An unpleasant sensation (pain, pressure, discomfort) perceived to be related to the urinary bladder, associated with lower urinary tract symptoms of more than six weeks duration, in the absence of infection of other identifiable causes

47
Q

When is IC/BPS most common? What populations does it affect?

A

Affects women 5X > men

Most common in 4th decade

48
Q

What causes the abnormalities in lining of the bladder in IC/BPS?

A
  1. Defect in the glycosaminoglycan (GAG) layer that
  2. Allows urinary irritants to penetrate the urothelium and activate the underlying nerve and muscle tissue leading to tissue damage, pain, and hypersensitivity
49
Q

What factors can cause IC/BPS?

A
  1. UTI
  2. An episode of vaginitis or prostatitis
  3. Bladder, pelvic, back, or other type of surgery
  4. Trauma (eg, fall onto the tailbone [coccyx] or car accident)
50
Q

What are the sxs of IC/BPS?

A
  1. Bladder pain is partially relieved by voiding
  2. Frequency
  3. Urgency
  4. Nocturia
  5. Suprapubic pain &/or urethral pain
    A. Mild burning to severe and debilitating
    B. Pain describes as sharp or glass scraping over orifice
  6. Gradual onset w/ increase over months
  7. May have IBS, dysmenorrhea, endometriosis, vulvodynia, fibromyalgia, or prostatitis
51
Q

What factors may exascerbate IC/BPS?

A
  1. Consuming certain foods or drinks (coffee, alcohol, spicy foods)
  2. Full bladder
  3. Luteal phase of the menstrual cycle (days 14-28)
  4. High stress
  5. Exercise or sexual intercourse
  6. Prolonged sitting
52
Q

What are the diagnostic steps in IC/BPS?

A
  1. History
  2. Physical Exam
    A. pelvic/prostate
    B.tenderness or tightness of the pelvic floor muscles
  3. UA w/ micro
  4. Urinary Cystoscopy
  5. Urine cytology if hematuria
  6. Measure post void residual volume (USN)
53
Q

When is cystoscopy indicated?

A
  1. Hematuria
    A. Hunner lesions :
    Reddened lesions on the bladder mucosa with attached fibrin deposits
    -Bleed after hydrodistention (stretching of bladder when full causes bleeding)
  2. Glomerulations:
    Petechial red areas
  3. Increased numbers of mast cells on histologic examination of bladder biopsy specimens
54
Q

What is the tx for IC/BPS?

A
  1. Behavior modification
  2. PT
  3. Counseling
  4. Diet restrictions
    See Handout
  5. Medications
    Pentosan polysulfate sodium (Elmiron)
    Amitriptyline (Elavil)
    Hydroxyzine (Atarax, Vistaril)
  6. Procedures
    Dimethylsulfoxide (DMSO)
    20 min instillation weekly x 6-8 weeks
    Sacral nerve stimulation

Gen Med Unit 5 (8 decks)

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