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Related Experiment Videos

The "turn-over" technique for selective cerebral angiography

H Touho1, J Karasawa, H Ohnishi

  • 1Department of Neurosurgery, Osaka Neurological Institute, Japan.

Neuroradiology
|January 1, 1994
PubMed
Summary

A novel "turn-over" catheter technique facilitates selective catheterisation in older patients with challenging aortic anatomy. This method simplifies accessing major vessels when standard approaches fail.

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Area of Science:

  • Cardiovascular Medicine
  • Interventional Cardiology
  • Vascular Surgery

Background:

  • Selective catheterisation is crucial for diagnosing and treating various cardiovascular conditions.
  • Severe aortic atherosclerosis and brachiocephalic vessel tortuosity pose significant challenges to standard catheterisation techniques, particularly in elderly patients.
  • Existing methods may be insufficient or carry higher risks in anatomically complex cases.

Purpose of the Study:

  • To introduce and evaluate a new "turn-over" technique for selective catheterisation.
  • To assess the efficacy and ease of use of the turn-over technique in patients with difficult aortic anatomy.
  • To provide an alternative method for successful vessel access when conventional approaches are not feasible.

Main Methods:

Related Experiment Videos

  • A novel "turn-over" technique was developed, involving guidewire manipulation above the aortic valves.
  • The technique entails advancing a long guidewire, inverting it above the aortic valves, and then guiding the catheter into target brachiocephalic vessels.
  • The technique was applied to 13 patients with severe aortic atherosclerosis or pronounced vessel tortuosity.

    • Main Results:

    • Selective catheterisation was successfully and completely achieved in all 13 patients using the turn-over technique.
    • The process of turning the catheter over the aortic valves and engaging the vessels was reported as very easy.
    • The technique demonstrated high feasibility in a challenging patient cohort.

    Conclusions:

    • The "turn-over" technique is a safe and effective method for selective catheterisation in patients with complex aortic and brachiocephalic vessel anatomy.
    • This technique offers a valuable alternative to overcome limitations of standard catheterisation in older patients with severe atherosclerosis or tortuosity.
    • The simplicity and success rate suggest widespread applicability in interventional cardiology and vascular procedures.