Urinary RetentionAPPROACH

RENAL AND URINARY · 19 SECTIONS

⚲

526 items

☷ Legend

⚲

Resuscitation and Universal Approaches9▾

Chest and Cardiovascular12▾

Respiratory11▾

Abdominal and Gastrointestinal24▾

Renal and Urinary7▾

Oliguria And Anuria Catheter Related Urinary Complaints Dialysis Patient Presentations Flank Pain And Renal Colic Concern Urinary Retention Hematuria Scrotal Pain

Neurologic11▾

Back and Neck8▾

Women's Health, Pregnancy, and GU11▾

Infectious Disease and Fever Syndromes11▾

Allergy and Dermatology7▾

Musculoskeletal and Extremities14▾

Trauma and Wounds14▾

ENT, Eye, Dental10▾

Endocrine, Metabolic, and Abnormal Labs9▾

Toxicology and Behavioral14▾

Pediatrics16▾

Environmental and Exposure4▾

01History/hx94

Presenting context

›Context and baseline

›Time of onset and duration of retention symptoms

›Acute complete inability to void

›Partial voiding with progressive difficulty

›Prior episodes

›Baseline urinary function

›Baseline post void residual if known

›Symptom pattern and trajectory

›Gradual worsening lower urinary tract symptoms

›Sudden onset retention after trigger

›Intermittent retention episodes

›Postoperative course timing

Lower urinary tract symptoms

›Obstructive symptoms

›Hesitancy

›Weak stream

›Intermittency

›Straining

›Incomplete emptying sensation

›Post void dribbling

›Irritative symptoms

›Frequency

›Urgency

›Nocturia

›Dysuria

›Suprapubic discomfort

OPQRST

›Onset characterization

›Sudden onset

›Gradual onset

›Post trigger timing

›Provocation and palliation

›Worse after alcohol intake

›Worse after cold exposure

›Worse after prolonged immobility

›Triggered by constipation

›Triggered by recent procedure

›Improved after warm bath

›Symptom quality

›Suprapubic pressure

›Suprapubic pain

›Burning dysuria

›Flank pain

›Location and radiation

›Suprapubic

›Perineal

›Flank

›Groin radiation

›Severity

›Unable to void at all

›Minimal dribbling only

›Severe pain with distension

›Mild discomfort with retention

›Timing pattern

›Constant inability to void

›Episodic retention

›Worse at night

›Postoperative day association

Associated symptoms

›Infectious and inflammatory

›Fever

›Chills

›Rigors

›Dysuria

›Foul smelling urine

›Hematuria

›Renal colic and obstruction

›Flank pain

›Nausea

›Vomiting

›Gross hematuria

›Neurologic

›New back pain

›Leg weakness

›Saddle anesthesia

›New fecal incontinence

›New urinary incontinence overflow

›Hemodynamic and systemic

›Lightheadedness

›Syncope

›Confusion

›Decreased oral intake

Urologic and gynecologic history

›Male specific

›Known benign prostatic hyperplasia

›Prior prostate cancer treatment history

›Prior urethral instrumentation

›Erectile dysfunction medications

›Female specific

›Pregnancy status and postpartum status

›Pelvic organ prolapse symptoms

›Recent pelvic surgery

›Vulvar or pelvic pain

›Prior urologic conditions

›Urethral stricture history

›Prior urinary retention

›Recurrent urinary tract infections

›Nephrolithiasis history

02Alarm Features/alarm29

Immediate danger features

›Escalation triggers

›Sepsis concern

›Fever with hypotension

›Tachycardia with altered mental status

›Acute kidney injury concern

›Anuria

›Oliguria with rising creatinine

›Cauda equina syndrome concern

›Urinary retention with saddle anesthesia

›Urinary retention with new leg weakness

›Obstructed infected system concern

›Flank pain with fever

›Flank pain with hypotension

›Gross hematuria with clot retention

›Inability to void with visible clots

›Suprapubic distension with ongoing bleeding

Vital sign thresholds

›High risk vitals

›Systolic blood pressure < 90 mmHg

›Heart rate > 120 bpm

›Respiratory rate > 24 per minute

›Temperature >= 38.0 C

›Oxygen saturation < 92 percent

High risk contexts

›High risk situations

›Recent spinal trauma

›Recent epidural or spinal anesthesia

›Immunocompromised state

›Pregnancy with acute retention

›Solitary kidney with suspected obstruction

›Known urologic malignancy

03Medications/meds28

Medication causes of retention

›Anticholinergic burden

›Antihistamines

›Tricyclic antidepressants

›Antipsychotics

›Antispasmodics

›Parkinson medications with anticholinergic effect

›Sympathomimetics

›Decongestants

›Amphetamines

›Cocaine exposure history

›Opioids and sedatives

›Opioids

›Benzodiazepines

›Gabapentinoids

›Other contributors

›Calcium channel blockers

›NSAIDs in volume depletion context

›Diuretics with dehydration contribution

Medication history features

›Medication use pattern

›Recent new medication

›Recent dose escalation

›Recent perioperative medications

›Over the counter cold products

›Herbal supplements

›Anticoagulants and bleeding risk

›Warfarin

›Direct oral anticoagulant

›Antiplatelet therapy

04Diet/diet9

Intake and exposures

›Hydration and intake

›Low fluid intake

›Recent vomiting

›Recent diarrhea

›Triggers and exposures

›Alcohol intake

›Caffeine intake

›Energy drink intake

›Constipating diet pattern

05Review of Systems/ros28

System symptom screen

›Genitourinary

›Dysuria

›Frequency

›Urgency

›Nocturia

›Hematuria

›Incontinence overflow

›Gastrointestinal

›Constipation

›Obstipation

›Abdominal distension

›Nausea

›Vomiting

›Neurologic

›Back pain

›Weakness

›Numbness

›Saddle anesthesia

›Gait change

›Infectious

›Fever

›Chills

›Rigors

›Recent infection symptoms

›Cardiopulmonary

›Chest pain

›Dyspnea

›Palpitations

06Collateral History and Family History/chafh8

Collateral and family patterns

›Collateral inputs

›Witnessed inability to void

›Timeline confirmation

›Baseline functional status

›Family history

›Prostate cancer

›Kidney stones

›Urologic malignancy

07Risk Factors/rf23

Patient and exposure risk

›Obstructive risk

›Benign prostatic hyperplasia

›Prostate cancer history

›Urethral stricture history

›Prior pelvic radiation

›Neurologic risk

›Diabetes mellitus with neuropathy (E11.9)

›Multiple sclerosis (G35)

›Spinal stenosis

›Recent spinal trauma

›Infectious risk

›Recent urinary tract infection

›Indwelling catheter history

›Immunosuppression

›Stone risk

›Prior nephrolithiasis (N20.0)

›Dehydration

›Hypercalciuria history

›Procedure and device risk

›Recent surgery

›Recent anesthesia

›Recent urethral instrumentation

›Pelvic organ prolapse history

08Differential Diagnosis/ddx61

Life threatening

›Life threatening causes

›Cauda equina syndrome (G83.4)

›Urinary retention

›Saddle anesthesia

›New leg weakness

›Sepsis from urinary source (A41.9)

›Fever

›Hypotension

›Altered mental status

›Obstructed infected urinary system

›Flank pain

›Fever

›Hydronephrosis

›Acute kidney injury from obstruction (N17.9)

›Rising creatinine

›Hyperkalemia

›Gross hematuria with clot retention (R31.0)

›Visible clots

›Bladder distension

Common

›Common causes

›Benign prostatic hyperplasia related obstruction (N40.1)

›Progressive obstructive symptoms

›Enlarged prostate on exam

›Constipation and fecal impaction (K59.00)

›No bowel movement

›Rectal vault stool

›Medication induced urinary retention

›Anticholinergic exposure

›Opioid exposure

›Urinary tract infection (N39.0)

›Dysuria

›Pyuria

›Postoperative urinary retention

›Recent surgery

›Recent neuraxial anesthesia

Less common

›Less common causes

›Urethral stricture (N35.9)

›Weak stream

›Prior instrumentation history

›Neurogenic bladder

›Diabetes neuropathy

›Spinal cord disease

›Prostatitis (N41.0)

›Perineal pain

›Tender prostate

›Bladder outlet obstruction from malignancy

›Weight loss

›Hematuria

›Pelvic organ prolapse

›Vaginal bulge symptoms

›Post void retention sensation

Mimics and pitfalls

›Mimics

›Anuria from shock without retention

›Empty bladder on scan

›Hypotension

›Pain limited voiding without true retention

›Small post void residual

›Severe dysuria

›Functional retention

›Anxiety context

›Normal objective findings

09Past Medical History/pmh18

Relevant history clusters

›Urologic history

›Benign prostatic hyperplasia

›Prior urinary retention episodes

›Recurrent urinary tract infections

›Nephrolithiasis

›Urologic surgeries

›Neurologic and endocrine

›Diabetes mellitus

›Multiple sclerosis

›Prior stroke (I63.9)

›Parkinson disease (G20)

›Surgical and anesthesia history

›Recent surgery type

›Neuraxial anesthesia history

›Pelvic surgery history

›Baseline status

›Baseline continence

›Baseline mobility and sensation

10Physical Exam/exam37

Vitals and general

›General and hemodynamics

›Mental status

›Toxic appearance

›Perfusion and hydration

›Fever pattern

›Abdominal and bladder

›Suprapubic distension

›Suprapubic tenderness

›Peritoneal signs

›Palpable bladder

Genitourinary exam

›Male focused

›Meatal stenosis

›Phimosis

›Testicular exam for pain source

›Digital rectal exam

›Prostate enlargement

›Prostate tenderness

›Female focused

›Pelvic organ prolapse

›Vulvar lesions

›Pelvic tenderness

Neurologic and spine

›Cauda equina screen

›Lower extremity strength

›Lower extremity sensation

›Perineal sensation

›Anal wink and tone

›Back and spine

›Midline tenderness

›Radicular signs

›Trauma stigmata

Skin and extremities

›Volume status signs

›Dry mucous membranes

›Delayed capillary refill

›Edema absence

›Infection sources

›Cellulitis

›Perineal skin infection

11Lab Studies/labs24

Core labs and interpretation

›Basic evaluation

›Urinalysis

›Pyuria pattern

›Hematuria pattern

›Urine culture

›Antibiotic tailoring value

›Prior resistant organism history relevance

›Creatinine and electrolytes

›Acute kidney injury pattern

›Hyperkalemia concern

›CBC

›Leukocytosis context

›Anemia in hematuria context

›Sepsis and systemic concern

›Lactate

›Elevated lactate supports hypoperfusion

›Normal lactate does not exclude sepsis

›Blood cultures

›Prior to antibiotics when feasible

›Higher yield in hypotension or rigors

Test pitfalls

›Common limitations

›Pyuria absent early in infection

›Contaminated specimen after catheter insertion

›Hematuria can be from catheter trauma

12Imaging/img32

Scoring Systems

›Decision tools

›Post void residual thresholds

›> 300 mL suggests significant retention

›> 500 mL supports acute retention in most contexts

›Sepsis screening tools

›qSOFA limited sensitivity

›Use with clinical judgment

MRI

›MRI spine

›Cauda equina syndrome concern

›Urinary retention with saddle anesthesia

›Urinary retention with new weakness

›Contraindications and delays

›Non MRI compatible implant local protocol dependent

›Need for transfer if unavailable local protocol dependent

›CT abdomen and pelvis

›Urolithiasis with obstruction concern

›Flank pain pattern

›Hydronephrosis on ultrasound

›CT with contrast considerations

›Contrast allergy history

›Renal function context

›CT for malignancy concern

›Hematuria workup pathway local protocol dependent

›Pelvic mass concern local protocol dependent

Ultrasound

›Bladder ultrasound

›Post void residual estimate

›Bladder distension confirmation

›Foley balloon position check if poor drainage

›Renal ultrasound

›Hydronephrosis assessment

›Obstructive pattern support

›False negatives early obstruction

13Special Tests/spec13

Bedside diagnostics

›Bladder scan

›Pre catheter volume estimation

›Post catheter residual reassessment

›Catheter passage test

›Resistance at urethra suggests stricture

›Blood at meatus suggests urethral injury

›Rectal exam adjuncts

›Fecal impaction confirmation

›Anal tone assessment

Procedural diagnostics

›Difficult catheter algorithm local protocol dependent

›Coude catheter trial

›Smaller caliber catheter trial

›Urology consultation trigger

14ECG/ecg8

Indications and patterns

›ECG indications

›Hyperkalemia concern

›Sepsis with hemodynamic instability

›Chest pain or dyspnea concurrent

›Hyperkalemia findings

›Peaked T waves

›PR prolongation

›QRS widening

15Assessment/ax13

Problem representation

›Urinary retention severity

›Acute complete retention

›Chronic retention with overflow

›Postoperative retention

›Complications assessment

›Acute kidney injury presence

›Infection presence

›Neurogenic red flags presence

›Likely etiology stratification

›Bladder outlet obstruction

›Medication induced

›Neurologic cause

›Infectious inflammatory cause

16Plan/plan45

First 5 minutes

›Immediate stabilization

›Cardiac monitor if unstable

›IV access if sepsis concern

›Fluids if hypovolemia and no contraindication

›Broad spectrum antibiotics if sepsis suspected local protocol dependent

Bladder decompression

›Catheterization pathway

›Urethral Foley catheter

›Initial 14 to 18 Fr typical adult size

›Coude catheter if prostatic obstruction suspected

›Drainage monitoring

›Immediate urine output volume

›Hematuria after insertion

›Bladder decompression complications

›Post obstructive diuresis monitoring

›Hypotension after decompression uncommon

Etiology directed treatment

›Benign prostatic hyperplasia suspected

›Alpha blocker example

›Tamsulosin PO 0.4 mg daily

›Orthostatic hypotension risk

›Trial of void timing local protocol dependent

›2 to 3 days after alpha blocker start common practice

›Earlier trial may fail

›Urinary tract infection suspected

›Antibiotics local protocol dependent

›Tailor to local antibiogram

›Adjust for renal function

›Pyelonephritis or sepsis concern

›Parenteral antibiotics local protocol dependent

›Admission consideration

›Constipation contribution

›Disimpaction strategy local protocol dependent

›Osmotic laxative example

›Polyethylene glycol PO 17 g daily

›Avoid if bowel obstruction concern

›Cauda equina syndrome concern

›Immediate MRI spine

›Neurosurgery consultation emergent

Reassessment loop

›Reassessment timing

›Pain reassessment within 30 to 60 minutes

›Urine output reassessment within 1 hour

›Repeat bladder scan if poor catheter drainage

›Post obstructive diuresis monitoring

›Urine output > 200 mL per hour for 2 hours

›Or > 3 L in 24 hours

›Electrolytes every 4 to 6 hours if significant diuresis

17Disposition/dispo24

Level of care criteria

›ICU criteria

›Septic shock requiring vasopressors

›Severe hyperkalemia with ECG changes

›Rapid neurologic decline

›Inpatient admission criteria

›Obstructed infected system

›Acute kidney injury requiring monitoring

›Post obstructive diuresis requiring IV replacement

›Gross hematuria with ongoing clot retention

›Inability to catheterize with persistent retention

›Observation pathway criteria

›Postoperative retention without sepsis

›Stable vitals with moderate retention and clear plan

›Discharge criteria

›Symptom control

›Stable vitals

›Clear catheter function or successful trial of void

›Follow up arranged

Follow up timing

›Urology follow up

›Within 2 to 7 days if discharged with catheter

›Earlier if difficult catheterization or hematuria

›Primary care follow up

›Medication review within 1 to 2 weeks

›Constipation management follow up

18Discharge Instructions/di20

Copy discharge instructions

›Summary

›Urinary retention treated with bladder drainage

›Cause not always clear on first visit

›Catheter care

›Keep catheter and bag below bladder level

›Do not disconnect tubing unless instructed

›Clean around catheter daily with soap and water

›Medications

›Take prescribed medications as directed

›Avoid over the counter cold medicines that can worsen retention

›Fluids and bowel care

›Drink fluids unless told otherwise

›Prevent constipation with fiber and stool softener if recommended

›Return to ED now for

›Fever

›Shaking chills

›New back pain with weakness or numbness

›Catheter not draining for 2 to 3 hours with increasing pain

›Large amounts of blood in urine

›Severe pain not controlled

19References/r12

Guideline and evidence sources

›Urologic retention and lower urinary tract symptoms guidance

›American Urological Association guideline statements on BPH management local protocol dependent

›European Association of Urology guidelines on non neurogenic male LUTS and BPH local protocol dependent

›Neurogenic and spinal emergency guidance

›Neurologic emergency references for cauda equina syndrome evaluation and MRI timing local protocol dependent

›Spine society statements on emergent decompression timing local protocol dependent

›Infection and sepsis guidance

›Surviving Sepsis Campaign guidelines 2021

›IDSA guidance for complicated urinary tract infection and pyelonephritis local protocol dependent

›Diagnostic tool references

›Evidence summaries for post void residual thresholds and bladder scan performance local protocol dependent

›Imaging appropriateness criteria for suspected renal colic local protocol dependent

Evidence & Review

Reviewed by SymptomDx Medical Team · Last reviewed February 24, 2026

SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.

Urinary RetentionAPPROACH

RENAL AND URINARY · 19 SECTIONS

⚲

526 items

☷ Legend

⚲

Resuscitation and Universal Approaches9▾

Chest and Cardiovascular12▾

Respiratory11▾

Abdominal and Gastrointestinal24▾

Renal and Urinary7▾

Oliguria And Anuria Catheter Related Urinary Complaints Dialysis Patient Presentations Flank Pain And Renal Colic Concern Urinary Retention Hematuria Scrotal Pain

Neurologic11▾

Back and Neck8▾

Women's Health, Pregnancy, and GU11▾

Infectious Disease and Fever Syndromes11▾

Allergy and Dermatology7▾

Musculoskeletal and Extremities14▾

Trauma and Wounds14▾

ENT, Eye, Dental10▾

Endocrine, Metabolic, and Abnormal Labs9▾

Toxicology and Behavioral14▾

Pediatrics16▾

Environmental and Exposure4▾

01History/hx94

Presenting context

›Context and baseline

›Time of onset and duration of retention symptoms

›Acute complete inability to void

›Partial voiding with progressive difficulty

›Prior episodes

›Baseline urinary function

›Baseline post void residual if known

›Symptom pattern and trajectory

›Gradual worsening lower urinary tract symptoms

›Sudden onset retention after trigger

›Intermittent retention episodes

›Postoperative course timing

Lower urinary tract symptoms

›Obstructive symptoms

›Hesitancy

›Weak stream

›Intermittency

›Straining

›Incomplete emptying sensation

›Post void dribbling

›Irritative symptoms

›Frequency

›Urgency

›Nocturia

›Dysuria

›Suprapubic discomfort

OPQRST

›Onset characterization

›Sudden onset

›Gradual onset

›Post trigger timing

›Provocation and palliation

›Worse after alcohol intake

›Worse after cold exposure

›Worse after prolonged immobility

›Triggered by constipation

›Triggered by recent procedure

›Improved after warm bath

›Symptom quality

›Suprapubic pressure

›Suprapubic pain

›Burning dysuria

›Flank pain

›Location and radiation

›Suprapubic

›Perineal

›Flank

›Groin radiation

›Severity

›Unable to void at all

›Minimal dribbling only

›Severe pain with distension

›Mild discomfort with retention

›Timing pattern

›Constant inability to void

›Episodic retention

›Worse at night

›Postoperative day association

Associated symptoms

›Infectious and inflammatory

›Fever

›Chills

›Rigors

›Dysuria

›Foul smelling urine

›Hematuria

›Renal colic and obstruction

›Flank pain

›Nausea

›Vomiting

›Gross hematuria

›Neurologic

›New back pain

›Leg weakness

›Saddle anesthesia

›New fecal incontinence

›New urinary incontinence overflow

›Hemodynamic and systemic

›Lightheadedness

›Syncope

›Confusion

›Decreased oral intake

Urologic and gynecologic history

›Male specific

›Known benign prostatic hyperplasia

›Prior prostate cancer treatment history

›Prior urethral instrumentation

›Erectile dysfunction medications

›Female specific

›Pregnancy status and postpartum status

›Pelvic organ prolapse symptoms

›Recent pelvic surgery

›Vulvar or pelvic pain

›Prior urologic conditions

›Urethral stricture history

›Prior urinary retention

›Recurrent urinary tract infections

›Nephrolithiasis history

02Alarm Features/alarm29

Immediate danger features

›Escalation triggers

›Sepsis concern

›Fever with hypotension

›Tachycardia with altered mental status

›Acute kidney injury concern

›Anuria

›Oliguria with rising creatinine

›Cauda equina syndrome concern

›Urinary retention with saddle anesthesia

›Urinary retention with new leg weakness

›Obstructed infected system concern

›Flank pain with fever

›Flank pain with hypotension

›Gross hematuria with clot retention

›Inability to void with visible clots

›Suprapubic distension with ongoing bleeding

Vital sign thresholds

›High risk vitals

›Systolic blood pressure < 90 mmHg

›Heart rate > 120 bpm

›Respiratory rate > 24 per minute

›Temperature >= 38.0 C

›Oxygen saturation < 92 percent

High risk contexts

›High risk situations

›Recent spinal trauma

›Recent epidural or spinal anesthesia

›Immunocompromised state

›Pregnancy with acute retention

›Solitary kidney with suspected obstruction

›Known urologic malignancy

03Medications/meds28

Medication causes of retention

›Anticholinergic burden

›Antihistamines

›Tricyclic antidepressants

›Antipsychotics

›Antispasmodics

›Parkinson medications with anticholinergic effect

›Sympathomimetics

›Decongestants

›Amphetamines

›Cocaine exposure history

›Opioids and sedatives

›Opioids

›Benzodiazepines

›Gabapentinoids

›Other contributors

›Calcium channel blockers

›NSAIDs in volume depletion context

›Diuretics with dehydration contribution

Medication history features

›Medication use pattern

›Recent new medication

›Recent dose escalation

›Recent perioperative medications

›Over the counter cold products

›Herbal supplements

›Anticoagulants and bleeding risk

›Warfarin

›Direct oral anticoagulant

›Antiplatelet therapy

04Diet/diet9

Intake and exposures

›Hydration and intake

›Low fluid intake

›Recent vomiting

›Recent diarrhea

›Triggers and exposures

›Alcohol intake

›Caffeine intake

›Energy drink intake

›Constipating diet pattern

05Review of Systems/ros28

System symptom screen

›Genitourinary

›Dysuria

›Frequency

›Urgency

›Nocturia

›Hematuria

›Incontinence overflow

›Gastrointestinal

›Constipation

›Obstipation

›Abdominal distension

›Nausea

›Vomiting

›Neurologic

›Back pain

›Weakness

›Numbness

›Saddle anesthesia

›Gait change

›Infectious

›Fever

›Chills

›Rigors

›Recent infection symptoms

›Cardiopulmonary

›Chest pain

›Dyspnea

›Palpitations

06Collateral History and Family History/chafh8

Collateral and family patterns

›Collateral inputs

›Witnessed inability to void

›Timeline confirmation

›Baseline functional status

›Family history

›Prostate cancer

›Kidney stones

›Urologic malignancy

07Risk Factors/rf23

Patient and exposure risk

›Obstructive risk

›Benign prostatic hyperplasia

›Prostate cancer history

›Urethral stricture history

›Prior pelvic radiation

›Neurologic risk

›Diabetes mellitus with neuropathy (E11.9)

›Multiple sclerosis (G35)

›Spinal stenosis

›Recent spinal trauma

›Infectious risk

›Recent urinary tract infection

›Indwelling catheter history

›Immunosuppression

›Stone risk

›Prior nephrolithiasis (N20.0)

›Dehydration

›Hypercalciuria history

›Procedure and device risk

›Recent surgery

›Recent anesthesia

›Recent urethral instrumentation

›Pelvic organ prolapse history

08Differential Diagnosis/ddx61

Life threatening

›Life threatening causes

›Cauda equina syndrome (G83.4)

›Urinary retention

›Saddle anesthesia

›New leg weakness

›Sepsis from urinary source (A41.9)

›Fever

›Hypotension

›Altered mental status

›Obstructed infected urinary system

›Flank pain

›Fever

›Hydronephrosis

›Acute kidney injury from obstruction (N17.9)

›Rising creatinine

›Hyperkalemia

›Gross hematuria with clot retention (R31.0)

›Visible clots

›Bladder distension

Common

›Common causes

›Benign prostatic hyperplasia related obstruction (N40.1)

›Progressive obstructive symptoms

›Enlarged prostate on exam

›Constipation and fecal impaction (K59.00)

›No bowel movement

›Rectal vault stool

›Medication induced urinary retention

›Anticholinergic exposure

›Opioid exposure

›Urinary tract infection (N39.0)

›Dysuria

›Pyuria

›Postoperative urinary retention

›Recent surgery

›Recent neuraxial anesthesia

Less common

›Less common causes

›Urethral stricture (N35.9)

›Weak stream

›Prior instrumentation history

›Neurogenic bladder

›Diabetes neuropathy

›Spinal cord disease

›Prostatitis (N41.0)

›Perineal pain

›Tender prostate

›Bladder outlet obstruction from malignancy

›Weight loss

›Hematuria

›Pelvic organ prolapse

›Vaginal bulge symptoms

›Post void retention sensation

Mimics and pitfalls

›Mimics

›Anuria from shock without retention

›Empty bladder on scan

›Hypotension

›Pain limited voiding without true retention

›Small post void residual

›Severe dysuria

›Functional retention

›Anxiety context

›Normal objective findings

09Past Medical History/pmh18

Relevant history clusters

›Urologic history

›Benign prostatic hyperplasia

›Prior urinary retention episodes

›Recurrent urinary tract infections

›Nephrolithiasis

›Urologic surgeries

›Neurologic and endocrine

›Diabetes mellitus

›Multiple sclerosis

›Prior stroke (I63.9)

›Parkinson disease (G20)

›Surgical and anesthesia history

›Recent surgery type

›Neuraxial anesthesia history

›Pelvic surgery history

›Baseline status

›Baseline continence

›Baseline mobility and sensation

10Physical Exam/exam37

Vitals and general

›General and hemodynamics

›Mental status

›Toxic appearance

›Perfusion and hydration

›Fever pattern

›Abdominal and bladder

›Suprapubic distension

›Suprapubic tenderness

›Peritoneal signs

›Palpable bladder

Genitourinary exam

›Male focused

›Meatal stenosis

›Phimosis

›Testicular exam for pain source

›Digital rectal exam

›Prostate enlargement

›Prostate tenderness

›Female focused

›Pelvic organ prolapse

›Vulvar lesions

›Pelvic tenderness

Neurologic and spine

›Cauda equina screen

›Lower extremity strength

›Lower extremity sensation

›Perineal sensation

›Anal wink and tone

›Back and spine

›Midline tenderness

›Radicular signs

›Trauma stigmata

Skin and extremities

›Volume status signs

›Dry mucous membranes

›Delayed capillary refill

›Edema absence

›Infection sources

›Cellulitis

›Perineal skin infection

11Lab Studies/labs24

Core labs and interpretation

›Basic evaluation

›Urinalysis

›Pyuria pattern

›Hematuria pattern

›Urine culture

›Antibiotic tailoring value

›Prior resistant organism history relevance

›Creatinine and electrolytes

›Acute kidney injury pattern

›Hyperkalemia concern

›CBC

›Leukocytosis context

›Anemia in hematuria context

›Sepsis and systemic concern

›Lactate

›Elevated lactate supports hypoperfusion

›Normal lactate does not exclude sepsis

›Blood cultures

›Prior to antibiotics when feasible

›Higher yield in hypotension or rigors

Test pitfalls

›Common limitations

›Pyuria absent early in infection

›Contaminated specimen after catheter insertion

›Hematuria can be from catheter trauma

12Imaging/img32

Scoring Systems

›Decision tools

›Post void residual thresholds

›> 300 mL suggests significant retention

›> 500 mL supports acute retention in most contexts

›Sepsis screening tools

›qSOFA limited sensitivity

›Use with clinical judgment

MRI

›MRI spine

›Cauda equina syndrome concern

›Urinary retention with saddle anesthesia

›Urinary retention with new weakness

›Contraindications and delays

›Non MRI compatible implant local protocol dependent

›Need for transfer if unavailable local protocol dependent

›CT abdomen and pelvis

›Urolithiasis with obstruction concern

›Flank pain pattern

›Hydronephrosis on ultrasound

›CT with contrast considerations

›Contrast allergy history

›Renal function context

›CT for malignancy concern

›Hematuria workup pathway local protocol dependent

›Pelvic mass concern local protocol dependent

Ultrasound

›Bladder ultrasound

›Post void residual estimate

›Bladder distension confirmation

›Foley balloon position check if poor drainage

›Renal ultrasound

›Hydronephrosis assessment

›Obstructive pattern support

›False negatives early obstruction

13Special Tests/spec13

Bedside diagnostics

›Bladder scan

›Pre catheter volume estimation

›Post catheter residual reassessment

›Catheter passage test

›Resistance at urethra suggests stricture

›Blood at meatus suggests urethral injury

›Rectal exam adjuncts

›Fecal impaction confirmation

›Anal tone assessment

Procedural diagnostics

›Difficult catheter algorithm local protocol dependent

›Coude catheter trial

›Smaller caliber catheter trial

›Urology consultation trigger

14ECG/ecg8

Indications and patterns

›ECG indications

›Hyperkalemia concern

›Sepsis with hemodynamic instability

›Chest pain or dyspnea concurrent

›Hyperkalemia findings

›Peaked T waves

›PR prolongation

›QRS widening

15Assessment/ax13

Problem representation

›Urinary retention severity

›Acute complete retention

›Chronic retention with overflow

›Postoperative retention

›Complications assessment

›Acute kidney injury presence

›Infection presence

›Neurogenic red flags presence

›Likely etiology stratification

›Bladder outlet obstruction

›Medication induced

›Neurologic cause

›Infectious inflammatory cause

16Plan/plan45

First 5 minutes

›Immediate stabilization

›Cardiac monitor if unstable

›IV access if sepsis concern

›Fluids if hypovolemia and no contraindication

›Broad spectrum antibiotics if sepsis suspected local protocol dependent

Bladder decompression

›Catheterization pathway

›Urethral Foley catheter

›Initial 14 to 18 Fr typical adult size

›Coude catheter if prostatic obstruction suspected

›Drainage monitoring

›Immediate urine output volume

›Hematuria after insertion

›Bladder decompression complications

›Post obstructive diuresis monitoring

›Hypotension after decompression uncommon

Etiology directed treatment

›Benign prostatic hyperplasia suspected

›Alpha blocker example

›Tamsulosin PO 0.4 mg daily

›Orthostatic hypotension risk

›Trial of void timing local protocol dependent

›2 to 3 days after alpha blocker start common practice

›Earlier trial may fail

›Urinary tract infection suspected

›Antibiotics local protocol dependent

›Tailor to local antibiogram

›Adjust for renal function

›Pyelonephritis or sepsis concern

›Parenteral antibiotics local protocol dependent

›Admission consideration

›Constipation contribution

›Disimpaction strategy local protocol dependent

›Osmotic laxative example

›Polyethylene glycol PO 17 g daily

›Avoid if bowel obstruction concern

›Cauda equina syndrome concern

›Immediate MRI spine

›Neurosurgery consultation emergent

Reassessment loop

›Reassessment timing

›Pain reassessment within 30 to 60 minutes

›Urine output reassessment within 1 hour

›Repeat bladder scan if poor catheter drainage

›Post obstructive diuresis monitoring

›Urine output > 200 mL per hour for 2 hours

›Or > 3 L in 24 hours

›Electrolytes every 4 to 6 hours if significant diuresis

17Disposition/dispo24

Level of care criteria

›ICU criteria

›Septic shock requiring vasopressors

›Severe hyperkalemia with ECG changes

›Rapid neurologic decline

›Inpatient admission criteria

›Obstructed infected system

›Acute kidney injury requiring monitoring

›Post obstructive diuresis requiring IV replacement

›Gross hematuria with ongoing clot retention

›Inability to catheterize with persistent retention

›Observation pathway criteria

›Postoperative retention without sepsis

›Stable vitals with moderate retention and clear plan

›Discharge criteria

›Symptom control

›Stable vitals

›Clear catheter function or successful trial of void

›Follow up arranged

Follow up timing

›Urology follow up

›Within 2 to 7 days if discharged with catheter

›Earlier if difficult catheterization or hematuria

›Primary care follow up

›Medication review within 1 to 2 weeks

›Constipation management follow up

18Discharge Instructions/di20

Copy discharge instructions

›Summary

›Urinary retention treated with bladder drainage

›Cause not always clear on first visit

›Catheter care

›Keep catheter and bag below bladder level

›Do not disconnect tubing unless instructed

›Clean around catheter daily with soap and water

›Medications

›Take prescribed medications as directed

›Avoid over the counter cold medicines that can worsen retention

›Fluids and bowel care

›Drink fluids unless told otherwise

›Prevent constipation with fiber and stool softener if recommended

›Return to ED now for

›Fever

›Shaking chills

›New back pain with weakness or numbness

›Catheter not draining for 2 to 3 hours with increasing pain

›Large amounts of blood in urine

›Severe pain not controlled

19References/r12

Guideline and evidence sources

›Urologic retention and lower urinary tract symptoms guidance

›American Urological Association guideline statements on BPH management local protocol dependent

›European Association of Urology guidelines on non neurogenic male LUTS and BPH local protocol dependent

›Neurogenic and spinal emergency guidance

›Neurologic emergency references for cauda equina syndrome evaluation and MRI timing local protocol dependent

›Spine society statements on emergent decompression timing local protocol dependent

›Infection and sepsis guidance

›Surviving Sepsis Campaign guidelines 2021

›IDSA guidance for complicated urinary tract infection and pyelonephritis local protocol dependent

›Diagnostic tool references

›Evidence summaries for post void residual thresholds and bladder scan performance local protocol dependent

›Imaging appropriateness criteria for suspected renal colic local protocol dependent

Evidence & Review

Reviewed by SymptomDx Medical Team · Last reviewed February 24, 2026

SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.