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A microguide wire with a scale (scaler guide). Technical note.

S Nishi¹, N Hashimoto, T Todaka

¹Dept. of Neurosurgery, National Cardio-Vascular Center Hospital; Osaka, Japan.

Interventional Neuroradiology : Journal of Peritherapeutic Neuroradiology, Surgical Procedures and Related Neurosciences

|August 4, 2010

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A new scaler guide with gold markers accurately measures vascular size during embolization and angioplasty. This improves the selection of devices and enhances interventional procedure safety.

Area of Science:

Vascular Interventions
Medical Device Development
Diagnostic Imaging

Background:

Accurate measurement of vascular dimensions is crucial for effective embolization and percutaneous transluminal angioplasty (PTA).
Previous methods for vascular size measurement lacked stability and precision.

Purpose of the Study:

To introduce and evaluate a novel microguide wire, termed a scaler guide, for precise vascular size measurement.
To assess the clinical utility of the scaler guide in improving interventional procedure outcomes.

Main Methods:

A new 0.014" or 0.016" microguide wire with 5 gold markers (1 mm length each, 4 mm spacing) was developed.
The scaler guide was used with a microcatheter for vessel navigation, followed by digital subtraction angiography (DSA).

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A magnification ratio was calculated using DSA and scaler guide markers to determine accurate vessel size.

Main Results:

The scaler guide enabled precise measurement of vascular size in patients with aneurysms, arteriovenous malformations, and stenotic lesions.
Accurate measurements facilitated easier and more effective selection of coils or PTA balloons.

Conclusions:

The novel scaler guide provides a stable and exact method for measuring vascular size during interventional procedures.
This device enhances the safety and effectiveness of embolization and PTA by improving device selection.