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Updated: Jun 3, 2026

Laparoscopic-Assisted Seldinger Technique for Peritoneal Dialysis Catheter Insertion
Published on: May 23, 2025
Telescoping catheter technique: looking towards the kidneys
Mamas A Mamas1, Farzin Fath-Ordoubadi, Douglas G Fraser
1Manchester Heart Centre, Manchester Royal Infirmary, Biomedical Research Centre, Oxford Road, M13 9WL Manchester, UK.
Insights
Patients with chronic kidney disease (CKD) undergoing percutaneous coronary intervention (PCI) can reduce contrast-induced nephropathy (CIN) risk. A novel catheter system minimizes contrast use, lowering mortality risks in high-risk patients.
Area of Science:
- Interventional Cardiology
- Nephrology
- Medical Device Technology
Background:
- Patients with chronic kidney disease (CKD) undergoing percutaneous coronary intervention (PCI) face high risks of contrast-induced nephropathy (CIN).
- CIN development is an independent predictor of mortality and is linked to contrast load.
- Minimizing contrast administration is crucial for renal protection in these vulnerable patients.
Observation:
- A 'five-in-six' catheter system (Heartrail, Terumo) allows an extra-length 5F guide catheter to be inserted into a standard 6F guide.
- This system facilitates extra-deep selective coronary intubation and opacification of native coronary vessels.
- The technique aims to reduce overall contrast volume used during PCI.
Findings:
- The described technique enables selective coronary opacification with reduced contrast volume.
- This approach is particularly beneficial for patients with severe renal dysfunction undergoing PCI.
- Successful application can mitigate the risk of CIN development.
Implications:
- This method offers a strategy to minimize contrast-induced nephropathy in high-risk CKD patients undergoing PCI.
- Consideration of this technique is recommended for interventional cardiologists aiming to reduce renal complications.
- Further studies may explore the long-term impact of this approach on patient outcomes.
Abstract:
Patients with chronic kidney disease (CKD) undergoing PCI are at very high risk from the development of contrast-induced nephropathy (CIN). Development of CIN in patients with CKD is an independent predictor of in-hospital and 1-year mortality, and contrast load is an important predictor for CIN development. The Terumo 'five-in-six' system involves insertion of an extra-length, 5F Terumo guide catheter (Heartrail, Terumo) into a standard 6F guide catheter so that the tip protrudes beyond the 6F guide. We describe the use of this system to facilitate extra-deep selective coronary intubation and opacification of native coronary vessels in order to minimize contrast use in patients with severe renal dysfunction, thereby reducing the potential for CIN development. This technique should be considered in patients at high risk from developing renal complications post PCI.
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