Complications of Celiac Plexus Block
Celiac plexus block is generally safe and effective, but clinicians must be prepared to recognize and manage both common transient complications (diarrhea in 44-60% and postural hypotension in 10-52%) and rare but potentially devastating complications including paraplegia, anterior spinal artery syndrome, and retroperitoneal necrosis.
Common Complications
Diarrhea (Most Frequent)
- Occurs in 44-60% of patients 1
- Usually transient, resolving within 48 hours
- Can rarely become chronic, debilitating, and life-threatening 1
- Management approach:
- First-line: Conventional antidiarrheals (loperamide, diphenoxylate)
- If refractory: Octreotide has proven beneficial for persistent cases 1
- Monitor for fecal incontinence as a severe manifestation
Postural Hypotension
- Occurs in 10-52% of patients 1
- Usually self-limited but can persist
- Persistent hypotension is rare but documented 2
- Management approach:
- Immediate: Fluid resuscitation in PACU
- Persistent cases: Corticosteroids have been effective 2
- Monitor closely for syncopal episodes requiring ACLS
Serious Neurological Complications
Paraplegia/Anterior Spinal Artery Syndrome
This is the most devastating complication, though rare 3, 4:
Clinical presentation:
- Progressive lower extremity weakness developing hours after procedure
- Preserved proprioception and vibration (posterior columns intact)
- Upper motor neuron signs
- Loss of pain and temperature sensation
Mechanism:
- Vasospasm of artery of Adamkiewicz
- Direct needle trauma near spinal vasculature
- Alcohol or epinephrine-induced vasospasm 4
Critical action: Immediate spine MRI to rule out structural lesions, though imaging may be normal in vasospasm cases 4
Other Documented Complications
Local Tissue Complications
- Back pain (common, usually transient) 1
- Retroperitoneal necrosis (extremely rare but can require surgical intervention) 5
- Local anesthesia toxicity 1
Cardiopulmonary
- Pneumothorax 1
- Pulmonary embolism (rare, may be related to procedure or underlying hypercoagulable state in cancer patients) 6
Risk Mitigation Strategies
Pre-procedure:
- Inform patients of all complications, from common to rare 2
- Consider overnight admission for patients with severe systemic disease 4
- Ensure imaging guidance (CT or EUS) for precise needle placement 7
Intra-procedure:
- Use 10-20 mL absolute ethanol for neurolysis 8
- Consider phenol as alternative in patients with alcohol intolerance 8
- Avoid excessive needle manipulation near major vessels
- Prophylactic antibiotics when using bupivacaine with steroids 8
Post-procedure:
- Monitor in PACU for hypotension and syncope 4
- Assess lower extremity motor function before discharge
- Have low threshold for admission if any neurological symptoms develop
- Provide clear discharge instructions about warning signs
Important Caveats
The 2018 Asian EUS consensus emphasizes that celiac plexus procedures should only be performed at expert centers with multidisciplinary support including interventional radiologists, surgeons, and anesthesiologists to manage complications promptly 8. The ESMO 2012 guidelines note that CPB appears safe and effective with significant advantage over standard analgesic therapy for up to 6 months 3, but the NCCN 2025 guidelines appropriately position it as an option when systemic analgesics fail or cause intolerable side effects 9.
Overall complication rates from recent data: Technical success 76.6%, adverse events 18.9% 7, with subjective pain improvement in 67.4% of patients 7.