Introduction to Sion Series Guidewires | ASAHI (Part 1)

Interventional guidewires play a pivotal role in the field of vascular intervention. A guidewire with good performance is one of the key factors for the success of interventional surgery. Interventional guidewires play the role of a "bridge" in interventional surgery. This issue will briefly introduce the vascular interventional guidewires of Asahi Inda, a leading guidewire manufacturer.

I. Introduction to Sion Tecc Guidewire

Sion Tecc guidewire is the general name for the new ASAHI guidewire design with built-in ACT ONE. The tip of the core wire is about 10 microns thick. A small part (ACT ONE) is added to the tip of such a tiny core wire. This is the unique composite double-core structure design of the guidewire. The new concept increases the infinite possibilities of guidewire control. Wherever your heart desires, it will follow you like a shadow.

The features of Sion Tecc guidewire are as follows:

1) Excellent head-end durability;

2) Balance the softness and controllability of the head end;

3) Jump-free torque transmission;

Figure 1. Schematic diagram of the Sion Tecc guidewire structure.

Figure 2. Schematic diagram of the common guidewire structure.

II. Detailed explanation of Sion series guidewire products

ASAHI has launched a series of Sion Tecc guidewire products. Today we will mainly introduce the features of the three Sion series guidewires - Sion Blue, Sion, and Sion Black.

2.1 Sion Blue

1. Structural composition

1) 0.014'' PTCA guidewire, (Sion Tecc core structure) - stainless steel core wire + composite core (ACT ONE round wire spring structure, twisted wire structure);

2) 20cm coiled spring structure;

3) Head weight: 0.5g;

4) Development area length: 3cm;

5) 180cm and 300cm working lengths are available, with straight and J-shaped heads available;

6) The proximal push rod has a unique dark blue appearance - PTFE coating;

Figure 3. Schematic diagram of the Sion Blue guidewire structure.

2. Performance characteristics

The composite core (SlON TECC) structure has great tip flexibility, and the durable tip can treat a variety of lesion types; the 1.5cm silicone hydrophobic coating makes surgical operations safer, and the soft tip improves lubrication performance; The proximal push rod surface has a hydrophilic coating to provide better delivery. The preferred guidewire for placing the microcatheter into the desired position/side branch or in front of the cap.

3. Tips for use

The tip is durable, but care must be taken when shaping and bending the tip. The distal end is prone to deformation/fracture during torsion and core wire assembly. The most ideal technique is to insert the needle, operate the tip with small back-and-forth movements and apply slight pressure to the tip. The guidewire can be easily operated without a torque controller, and it is easy to form a safe positioning in the distal vessel. The surface of the proximal push rod is dark blue, which is convenient for identifying the device during multi-guidewire operation. When the guidewire is placed in a small side branch, it has a safer and better support.

2.2 Sion

1. Structural composition

1) 0.014'' PTCA guidewire, (Sion Tecc core structure) - stainless steel core wire + composite core (ACT ONE round wire spring structure, twisted wire structure);

2) 28cm coiled spring structure;

3) 28cm distal hydrophilic coating;

4) Head weight: 0.7g;

5) Development area length: 3cm;

6) 180cm and 300cm working lengths are available, with straight and J-shaped heads available;

7) The proximal push rod has a green appearance - PTFE coating;

Figure 4. Schematic diagram of the Sion guidewire structure.

2. Performance characteristics

Composite core structure, good tip durability, good torque performance; recommended for tight and curved vessels and side branches; AWE, RWE, parallel wire technique, sliding, drilling; CTO retrograde, navigation septal side branches; one of the main guidewires for septal side branch crossing (using Sion black, Fielder XT-R/A and Suoh 03); it can be the first choice for crossing invisible channels, and also in simpler CTO (J-CTO 0,1); acute and extreme bends are replaced by Suoh 03.

3. Tips for use

The guidewire is advanced by pushing and rotating, and has a flexible shaft end design that can be easily manipulated without a torque controller. The typical 1mm CTO curved segment is suitable for CTO surgeries such as AWE, secondary curved dissection, etc. The microcatheter is placed on the CTO cap, and the guidewire can be modified by manipulation to obtain stronger penetration and control. Compared with Sion Blue, it has a durable tip and a harder tactile feedback tip, which is less prone to tip breakage. The most ideal technique is to insert the needle, operate the tip with a small back and forth motion and apply slight pressure to the tip.

2.3 Sion Black

1. Structural composition

1) 0.014'' PTCA guidewire, (Sion Tecc core structure) - stainless steel core wire + composite core (ACT ONE round wire spring structure, twisted wire structure);

2) 12cm coiled spring structure;

3) 20cm polymer sheath;

4) 40cm distal hydrophilic coating;

5) Head weight: 0.8g;

6) Development area length: 3cm;

7) 190cm and 300cm working lengths are available, with straight and J-shaped heads available;

8) The proximal push rod has a green appearance - PTFE coating;

Figure 5. Schematic diagram of the Sion Black guidewire structure.

The polymer fills the irregularities of the winding spring, reducing contact resistance; the lubricity is enhanced by applying a hydrophilic coating to the polymer.

2. Performance characteristics

When passing through high-resistance stenosis lesions, anatomical curvatures of high-resistance stenosis and crossing lesions, and long calcified lesions, the distal end of the guidewire has a polymer sheath and a flexible tip design to maintain flexibility.

3. Tips for use

Use push and rotation to act on the guidewire at the same time, so that it can be advanced in a sliding manner; it can be easily manipulated without torque devices; when operating within the plaque, especially in long or calcified lesions, there is resistance when advancing the guidewire, visible bending of the guidewire body and specific tactile feedback; it needs to be advanced carefully, and the polymer sheath guidewire can enter the subintimal membrane, sometimes feeling like the intima, sliding without free tip movement; when under the intima, in most cases, the guidewire is not fixed, "and the behavior is different from the above plaque process.

III. Conclusion

Interventional guidewires are important tools for interventional doctors during surgery. The selection and correct operation of the guidewires largely determine whether the surgery can be successful.

Dongguan Fortune Medical Technology Co., Ltd.

Fortune Medical provides professional design, development, and manufacturing solutions for interventional and implantable medical devices. We offer high-quality, traceable materials for interventional and implantable equipment, including implant-grade absorbable polymers, filaments, PET heat shrink tubing, implant-grade nitinol alloys, and more. Additionally, we provide custom machining services such as absorbable polymer molding and precision metal machining. We are committed to solving complex problems so that our medtech customers can bring innovative new products to the life sciences market and improve global healthcare.

Our company is located in Dongguan City, Guangdong Province, China. Situated in the scenic Greater Bay Area, Dongguan is known as the 'world's factory' with a highly developed industrial supply chain, enabling us to achieve fast delivery times. Fortune Medical collaborates with global medical device manufacturers to expedite the development of groundbreaking medical products, enhancing medical technology possibilities and improving global patient care. We are flexible to the needs of our customer and can support projects at any level, from initial concept to design, prototyping, and high-volume manufacturing.