Obtain a pelvic X-ray immediately to rule out fracture
For a patient with persistent pelvic pain one week after a fall who can still ambulate, the next step is to obtain a pelvic X-ray to definitively rule out or confirm a pelvic fracture. While the ability to walk is reassuring, it does not exclude a fracture, and persistent pain at one week warrants imaging evaluation.
Clinical Assessment
The fact that the patient can walk suggests hemodynamic stability and likely absence of severe unstable fracture patterns. However, persistent pain after one week is concerning and requires investigation. Clinical examination alone is unreliable for detecting pelvic fractures, though it has high sensitivity in conscious patients without shock 1.
Imaging Strategy
For This Stable Patient:
- Start with plain pelvic X-ray (anteroposterior view) - This is appropriate as the initial imaging modality for a hemodynamically stable patient presenting in an outpatient or non-emergency setting
- If the X-ray shows a fracture or if clinical suspicion remains high despite negative X-ray, proceed to CT scan of the pelvis without contrast for detailed fracture characterization
The guidelines emphasize that for hemodynamically stable patients, CT scanning is the gold standard 1. However, these guidelines specifically address acute high-energy trauma in the emergency setting. For your patient presenting one week post-injury with ability to ambulate, a stepwise approach starting with X-ray is more practical and cost-effective.
Key Considerations
Red flags that would require urgent evaluation:
- Development of inability to urinate
- Gross hematuria
- Blood at urethral meatus
- Suprapubic tenderness
- New neurological symptoms
If any of these symptoms are present, proceed directly to CT scan with contrast and consider urological evaluation 1.
Common Pitfalls to Avoid
- Don't assume ability to walk excludes fracture - Stable fracture patterns (Young-Burgess LC1, APC1) can allow ambulation
- Don't delay imaging - Persistent pain at one week is not normal and requires investigation
- Don't miss associated injuries - If fracture is confirmed, assess for bladder injury (3.5% of pelvic fractures) and urethral injury (4-19% of pelvic fractures) 1
If Fracture is Confirmed
The management depends on fracture stability classification (Young-Burgess or Tile classification). Unstable fractures require orthopedic consultation, while stable fractures typically require protected weight-bearing and pain management 2, 1.