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Difficulty: MediumUrologic Surgery

A 68-year-old man presents to the emergency department with severe lower abdominal discomfort and an inability to pass urine for the past 14 hours. He reports a two-year history of progressive urinary hesitancy, nighttime awakenings to void, and a weak urinary stream. Vital signs are within normal limits. Physical examination reveals a visibly distended, exquisitely tender suprapubic mass. Arrange the following interventions in the most appropriate sequential order for the standard evaluation and management of this patient's condition, from immediate to definitive.

  1. 1Bedside bladder ultrasound
  2. 2Placement of a urethral catheter
  3. 3Initiation of an alpha-1 adrenergic antagonist
  4. 4Outpatient trial of voiding
  5. 5Transurethral resection of the prostate

Answer

The correct sequence is: Bedside bladder ultrasound -> Placement of a urethral catheter -> Initiation of an alpha-1 adrenergic antagonist -> Outpatient trial of voiding -> Transurethral resection of the prostate.
The standard pathway for acute urinary retention secondary to benign prostatic hyperplasia progresses sequentially from noninvasive diagnostic confirmation (ultrasound), to acute mechanical relief (catheterization), to medical optimization (alpha-blockers), functional reassessment (trial of voiding), and ultimately definitive surgery (TURP) if conservative measures fail.

Step-by-Step Solution

1
Confirm the diagnosis of acute urinary retention noninvasively.
Bedside bladder ultrasound is performed to measure the post-void residual volume.
While the history and a palpable mass highly suggest acute urinary retention, an ultrasound rapidly confirms fluid presence and rules out other rare solid pelvic pathology before instrumentation.
2
Relieve the acute obstruction.
A urethral Foley catheter is placed to drain the bladder.
Immediate bladder decompression is the definitive acute treatment required to prevent post-renal acute kidney injury, upper tract dilation, and to alleviate the patient's severe discomfort.
3
Optimize the lower urinary tract for spontaneous voiding.
An alpha-1 adrenergic antagonist (e.g., tamsulosin) is prescribed.
These medications block sympathetic tone in the prostate and bladder neck, reducing dynamic outflow resistance and doubling the success rate of subsequent catheter removal.
4
Assess functional recovery of the bladder.
An outpatient trial of voiding is conducted after 3-7 days.
A waiting period is necessary for the alpha-blocker to reach peak clinical efficacy and for any procedure-related or retention-related prostatic edema to resolve.
5
Provide definitive treatment if conservative measures fail.
Transurethral resection of the prostate (TURP) is planned.
Patients who fail the trial of voiding have refractory retention and require surgical intervention to permanently relieve the underlying benign prostatic hyperplasia.

Key Concept

Management pathway for acute urinary retention secondary to benign prostatic hyperplasia
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Topics

Urologic Surgery

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