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Difficulty: MediumSurgical and Procedural Interventions

A 72-year-old man is evaluated on the orthopedic ward for new-onset agitation and lower abdominal discomfort. He underwent an uncomplicated right total hip arthroplasty 8 hours ago under spinal anesthesia. His medical history includes hypertension, type 2 diabetes mellitus, and benign prostatic hyperplasia. Current medications include amlodipine, metformin, and as-needed oxycodone. Vital signs are temperature 37.1°C (98.8°F), blood pressure 158/92 mmHg, pulse 108/min, and respirations 18/min. Physical examination reveals a palpable, tender mass in the suprapubic region. A bedside bladder ultrasound demonstrates a fluid volume of 650 mL. A nurse attempts to place a standard 16-French urethral catheter but encounters firm resistance in the prostatic urethra and is unable to advance the catheter further. Which of the following is the most appropriate next step in the procedural management of this patient?

  1. Attempt placement of a Coudé-tip catheterAnswer
  2. B
    Perform a bedside percutaneous suprapubic cystostomy
  3. C
    Administer oral tamsulosin and reassess the patient in 4 hours
  4. D
    Obtain a non-contrast CT scan of the abdomen and pelvis
  5. E
    Attempt insertion of a smaller 12-French standard urethral catheter

Answer

Attempt placement of a Coudé-tip catheter
The correct intervention addresses acute postoperative urinary retention (POUR) complicated by benign prostatic hyperplasia. When a standard straight-tip Foley catheter fails to pass due to resistance at the prostate, the standard-of-care next step is to use a Coudé-tip catheter. The Coudé catheter features a slightly curved, stiffer tip that is specifically designed to ride up over an enlarged median prostatic lobe and successfully enter the bladder. This is a non-invasive procedural maneuver that prevents the need for surgical interventions.

Step-by-Step Solution

1
Identify the primary clinical problem
The patient has acute postoperative urinary retention (POUR) causing pain and agitation, confirmed by a bladder volume of 650 mL.
Spinal anesthesia, opioid analgesics, and a history of benign prostatic hyperplasia significantly increase the risk of POUR.
2
Evaluate the failed initial intervention
A standard 16-French Foley catheter could not bypass the prostatic urethra.
In patients with benign prostatic hyperplasia, an enlarged median lobe often obstructs the straightforward passage of a standard straight-tip catheter.
3
Determine the safest and most effective next procedural step
Select a Coudé-tip catheter for the second attempt.
The Coudé catheter's curved tip allows it to navigate over the enlarged prostate and through the bladder neck without causing trauma.

Key Concept

Management of acute postoperative urinary retention with prostatic obstruction
Estimated Time:1m 15s
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Topics

Surgical and Procedural Interventions

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