Management of Loculated Fluid Collection Next to a Spinal Surgery Site

Initial Assessment and Risk Stratification

The American College of Radiology recommends clinical evaluation to determine the presence of fever, leukocytosis, or wound erythema suggesting infection in patients with loculated fluid collection adjacent to a spinal surgery site 1, 2
The American College of Radiology suggests assessing imaging characteristics, including collection size and degree of loculation, to evaluate the risk of infection or other complications 3, 2
The presence of spinal cord or nerve root compression should be assessed through imaging, as recommended by the American College of Radiology 1

For suspected infected collections, the American College of Radiology recommends MRI with and without IV contrast as the diagnostic modality of choice, with 96% sensitivity and 94% specificity 1
Percutaneous catheter drainage (PCD) is the first-line treatment for infected collections ≥3 cm, as recommended by the American College of Radiology and Praxis Medical Insights 3, 2
The American College of Radiology and Praxis Medical Insights suggest using either Seldinger (wire-guided) or trocar (direct puncture) technique for PCD, with CT guidance preferred for deep collections 3, 2
Antibiotic therapy is mandatory for all infected collections alongside drainage, as recommended by Praxis Medical Insights 4

The American College of Radiology and Praxis Medical Insights recommend against delaying drainage of symptomatic collections causing mass effect or neurologic symptoms, as early intervention improves outcomes 2
The World Journal of Emergency Surgery suggests that prophylactic subcutaneous drains at the time of initial surgery show no benefit in preventing fluid collections in most surgical procedures 5
The American College of Radiology recommends against routine imaging on asymptomatic postoperative patients, as fluid collections are common and often benign 3