The spleen plays an important role in immune function and filtering blood, which is why removing it surgically (splenectomy) carries long-term considerations, including an increased lifetime risk of certain infections. Splenic artery embolization has become an important tool precisely because it offers a way to control bleeding or reduce splenic blood flow in select situations without necessarily removing the organ entirely. Understanding how this technique preserves spleen function while addressing the underlying problem highlights why it has become a preferred approach in appropriately selected cases.
When Is Splenic Artery Embolization Used?
Splenic artery embolization is most commonly discussed in the context of blunt abdominal trauma, where the spleen is a frequently injured organ and can bleed significantly from lacerations or vascular injury. It is also used in some non-trauma settings, such as reducing an enlarged spleen's blood flow in conditions associated with hypersplenism (an overactive spleen destroying blood cells at an accelerated rate), or as a planned procedure before certain surgeries to reduce intraoperative bleeding risk. The specific indication shapes how the procedure is approached.
What Is the Difference Between Proximal and Distal Embolization?
Splenic artery embolization can be performed at different levels of the arterial tree, and this distinction matters for how much splenic tissue is affected. Proximal embolization involves occluding the main splenic artery trunk, which reduces overall blood pressure and flow into the spleen while still allowing some blood supply to reach the organ through collateral vessels — generally preserving spleen viability while still controlling bleeding. Distal (selective) embolization targets smaller branch vessels closer to the actual site of injury or abnormality, which is more targeted but affects a smaller, more localized portion of splenic tissue.
How Does Partial Embolization Preserve Spleen Function?
The concept of partial embolization is central to spleen-preserving care: rather than completely occluding all blood flow to the organ, the goal is to reduce flow sufficiently to control bleeding or reduce splenic overactivity while leaving enough residual blood supply, often through collateral vessels, to maintain at least partial splenic function. This balance is why proximal embolization is frequently favored in trauma settings — it addresses the pressure-related bleeding risk while generally preserving more overall splenic tissue than complete distal occlusion of all branches would.
What Does Recovery Involve After Splenic Artery Embolization?
Following embolization, patients are typically monitored for signs of ongoing bleeding, as well as for a symptom pattern sometimes referred to as post-embolization syndrome, which can include fever, abdominal pain, and fatigue in the days following the procedure — generally described as self-limiting. In trauma cases, ongoing monitoring for overall injury severity and other associated injuries continues alongside spleen-specific follow-up. Imaging is commonly used in follow-up to confirm the intended reduction in bleeding risk and to monitor splenic tissue viability over time.
What Are the Considerations When Embolization Is Not Enough?
In some cases of severe splenic injury or ongoing instability despite embolization, surgical splenectomy may still be required. The decision to proceed with embolization first, versus moving directly to surgery, depends on the patient's hemodynamic stability, the severity and pattern of splenic injury on imaging, and the overall clinical picture — a decision made by the trauma and interventional radiology teams together. Splenic artery embolization is generally considered an option for hemodynamically stable or stabilized patients with imaging findings suggesting an amenable injury pattern, rather than for every case of splenic trauma.
Embolic Devices Used in Splenic Procedures
Splenic artery embolization relies on embolic devices suited to the vessel size and flow characteristics of the splenic arterial tree, whether for proximal, single-point occlusion or more selective distal targeting. INVAMED manufactures a range of embolization technologies, including coil and microcatheter systems used across interventional radiology applications; further information is available on the INVAMED embolization products page. Availability and indications vary by country, and the Instructions for Use (IFU) should always be consulted.
Device availability and regulatory status vary by country. Please contact INVAMED or your authorized local distributor for current regulatory information applicable to your region.