Two weeks after prostate arterial embolization, I am passing 5 mm clots and have occasional light‑pink urine; is this normal and what type of CT imaging should be performed to identify the bleeding source?

Post-Prostate Embolization Bleeding: Assessment and Imaging

Passing 5mm clots and light pink urine 2 weeks after prostate artery embolization warrants evaluation with CT angiography (CTA) of the abdomen and pelvis to identify active bleeding sources, though some degree of hematuria can be expected during the recovery period.

Understanding Post-PAE Bleeding

While minor hematuria is common after prostate artery embolization, the presence of 5mm clots at 2 weeks post-procedure requires careful assessment. The key question is whether this represents expected post-procedural changes or active ongoing hemorrhage requiring intervention.

When to Image

If you are hemodynamically stable with stable vital signs and no signs of significant blood loss, the bleeding may represent:

• Sloughing of necrotic prostatic tissue (expected)
• Minor mucosal irritation
• Delayed bleeding from incomplete embolization

If you have any of the following, imaging is indicated immediately:

• Increasing clot size or frequency
• Persistent bright red blood
• Hemodynamic instability (low blood pressure, rapid heart rate)
• Significant drop in hemoglobin/hematocrit
• Inability to void due to clot obstruction

Appropriate CT Imaging Protocol

The correct imaging study is CTA (CT angiography) of the abdomen and pelvis with IV contrast. 1 This protocol specifically includes:

• Arterial phase acquisition (20-30 seconds after contrast injection)
• Portal venous phase (70-80 seconds delay)
• No need for non-contrast phase in the setting of suspected active hemorrhage 1

Why CTA is Superior

CTA has 97% accuracy for detecting active extravasation 1 and provides critical information:

• Identifies active arterial bleeding (contrast extravasation)
• Localizes the specific bleeding source
• Maps residual prostatic arterial anatomy
• Identifies potential nontarget embolization sites
• Guides potential repeat embolization if needed

What CTA Will Show

Active bleeding appears as contrast extravasation—contrast material leaking outside blood vessels into surrounding tissues. The multiphasic nature (arterial + venous phases) helps distinguish true extravasation from:

• Dilated tortuous vessels (false positive)
• Slow intermittent oozing (may be false negative) 1

Clinical Decision Algorithm

Step 1: Assess severity

• Clot size increasing or stable?
• Frequency of clotting episodes?
• Hemodynamic status?
• Ability to void?

Step 2: If stable with minimal symptoms

• Increase oral hydration
• Avoid anticoagulants/antiplatelets if possible
• Monitor closely for 24-48 hours
• Contact your interventional radiologist

Step 3: If persistent or worsening

• Obtain CTA abdomen/pelvis with IV contrast (arterial and venous phases)
• Check hemoglobin/hematocrit

Step 4: Based on CTA findings

• Active extravasation identified: Repeat angiography with selective embolization 1
• No active bleeding but large hematoma: Conservative management with close monitoring
• Negative study: Likely tissue sloughing; continue conservative management

Common Pitfalls to Avoid

Do NOT order:

• Non-contrast CT alone—provides minimal useful information for active bleeding 1
• CT with and without contrast—wastes time and radiation without added benefit 1
• Standard ultrasound—inadequate for detecting prostatic arterial bleeding

Important considerations:

• Persistent hemorrhage after initial embolization is a specific indication for CTA 1
• Some post-PAE bleeding from tissue necrosis is expected and self-limited
• The prostatic arteries have significant anatomic variation; incomplete initial embolization or collateral flow may cause delayed bleeding 2, 3, 4

What Happens Next

If CTA shows active bleeding, you will likely need repeat angiography with selective embolization of the bleeding vessel. This is performed by the interventional radiologist and has high success rates for controlling post-PAE hemorrhage. The CTA images can be used for procedural planning and even intra-procedural guidance using fusion imaging techniques 3.

Bottom line: Contact your interventional radiologist now to discuss whether immediate CTA is warranted based on your specific clinical picture. At minimum, you need close monitoring with repeat hemoglobin check and clear instructions on when to seek emergency care.