- Technologist presentation
- Open Access
TWIST-MR-Angiography to aid central venous access in challenging patients. A single centre experience
© Lawton et al. 2016
- Published: 27 January 2016
- Total Parenteral Nutrition
- Arteriovenous Malformation
- Intestinal Failure
- Fontan Circulation
- Complex Congenital Heart Disease
Obtaining adequate venous access is a recurrent problem in patients where long term access is required for the intravenous administration of prolonged antibiotics or parenteral nutrition. Assessment of vein adequacy and patency is clinically important in these patients.
We retrospectively reviewed patients who successfully underwent TWIST MR angiography at our centre for the evaluation of central venous patency with a view to obtaining access. 70% of patients were on long term total parenteral nutrition (TPN) for intestinal failure, the remaining 30% were patients with cystic fibrosis requiring long term lines for antibiotic administration).
TWIST MRA in parallel with the GeneRalized Autocalibrating Partially Parallel Acquisitions (GRAPPA) algorithm was performed using a 1.5T Siemens Magnetom Avanto MRI scanner. Gadolinium contrast (dose of 0.1 mls per kg), was administered at a rate of 2 mls per second for each examination.
We believe that TWIST with GRAPPA parallel acquisition could be used successfully to non-invasively and efficiently image patients with more complex vascular access issues, including those requiring long term total parental nutrition (TPN).
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