Vascular

Clinical case - Innova 3D/CT clinical benefit for peripheral interventions

Dr. D. Bay MD
Head of Department, Department of Radiology
Aker University Hospital, Oslo, Norway
B.Wimille, P.Gobert, GE Healthcare, Buc, France

   
 
     
  Introduction  
 
 
  Aker University Hospital is equipped with the Innova™ 4100IQ digital flat panel angiography system. The Innova 4100IQ system installed by GE Healthcare, has a 40 cm x 40 cm digital detector designed to perform general vascular interventional procedures and an integrated multi-modality Advantage Workstation™.  
     
  During the following case study, Digital Subtraction Angiography and the Innova 3D/CT imaging are used during the treatment of a ruptured left hypogastric aneurysm with a stentgraft.  
     
     
  Patient History  
 
 
 

This is a case of a 63 year-old male with a history of atrial fibrillation that is taking Warfarin medication.

 
 

The patient has suffered left pelvic pain for 5 days. There was a suspicion of diverticulitis.

 
 

He underwent a CT scan at another hospital, which revealed a ruptured left hypogastric aneurysm with a large retroperitoneal hematoma. The patient was then transferred to Aker University Hospital for intervention.

 
     
     
  Procedure  
 
 
 

The CT volume has been imported on the Advantage Workstation Volume Share 2 and postprocessed (see Fig.1 and Fig.2).

 
     
 
Volume Rendering
 
CT sagittal cross section  
   
       
 
     
 

After catheter placement using low dose fluoroscopy, a Digital Subtraction Angiography (DSA) acquisition was performed with an injection of 8cc of Visipaque (GE) - 270mgI/mL (see Fig.3).

 
     
 
       
Digital substraction
 
3d volume rendering  
   
       
 
     
 

An Innova 3D acquisition was performed at 40°/s, taking 5 seconds with an injection of 40cc of Visipaque(GE) - 270mgI/mL at 8cc/s.This was done before the treatment (see Fig.4).The injection point was on the aorta and the XRay acquisition is delayed by 1.5 seconds.

 
     
  An Innova CT 10d/s acquisition was performed just after in order to assess the retroperitoneal hematoma (see Fig.5)  
     
 
       
Innova CT axial
 
Balloon Dilation  
   
 
     
  The lesion was treated under low dose fluoroscopy, with an Excluder stentgraft (Gore) 16/14,4-120 (see Fig.6, Fig.7 and Fig.8).  
 
       
Stentgraft deployment
 
Vascularization  
   
       
 
     
 

After the dilatation, a further Innova 3D acquisition was performed at 40°/s, taking 5 seconds, with an injection of 40cc of Visipaque(GE) - 270mgI/mL at 8cc/s. This was done after the treatment (see Fig.9). The injection was on the aorta and the X-Ray acquisition is delayed by 1.5 seconds.

 
     
 
       
3D volume afte dilatation  
 
     
 
     
     
     
  Conclusion  
 
 
 

In this case, an endovascular repair of the ruptured aneurysm was possible, making open vascular surgery unnecessary. The high quality images obtained on the system, made both the planning and performance of the procedure easy.

 
     
 

The Innova CT acquisition mode is useful to evaluate retroperitoneal hematomas avoiding transport of the patient to a conventional CT Scanner. We will use this application - especially in cases involving the rupture of iliac arteries during PTA/stent for atherosclerotic obliterative disease.

 
   
 
 
   
   
   
   
   
   
     
Introduction  
Patient History  
Procedure  
Conclusion