Before diving into the topic of Hypotubes, let's first understand a specific clinical need.

During coronary angioplasty, doctors often have to apply tremendous force to guide the catheter through the arteries. Sometimes, when the lesion is severely blocked, the catheter struggles to advance inside the artery and may even kink. This makes it very difficult to correctly position the balloon or stent, and kinking may prevent the balloon from deflating properly, thereby increasing the risk to the patient.

Based on the above clinical needs, we can make a basic judgment:

A sufficiently long tube is needed that balances mechanical strength and flexibility​ - for easy pushability and smooth navigation through curves.

The inner lumen should ideally remain undeformed​ - to facilitate proper balloon inflation and deflation.

It is clear that neither plastic tubes nor simple metal tubes can balance the above points. This is when a "special push rod" needs to be called upon to meet the doctor's demands and save patients in critical situations.

Bang! The "straight-A student" - the Hypotube - enters the scene.

(Image: The black section is the Hypotube. Although the bend is somewhat exaggerated, this is roughly how it navigates inside blood vessels.)

I. What Is a Hypotube?

There is no dictionary-style definition for the Hypotube. In summary, it is a metal tube that undergoes special processing to possess high toughness and elasticity. It can be customized in various ways and is widely used in medical catheters.

A definition without rigid boundaries often means its applications can demonstrate infinite variations.

(Image: PTCA procedure and stent implantation)

Through the coronary arteries, through PTCA (Percutaneous Transluminal Coronary Angioplasty), the Hypotube began to enter the sight of medical professionals. Over the years, balloons have been updated, plastic tubes have been upgraded, yet the Hypotube - which occupies 70% to 80% of the total length of the catheter - has remained largely unchanged. "A classic from birth" is perhaps the best summary for it.

II. Breaking Stereotypes: A Hypotube Is Far More Than Just "304 Stainless Steel"

As the saying goes, "What brings success can also bring failure." Precisely because it is so classic, for many years people's understanding of it has become stereotypical: 304 stainless steel material, used in PTCA, single-structured… and so on. This is a complete misunderstanding of the Hypotube; its vast and profound potential has been quietly drowned in words.

(Image)

First of all, the Hypotube family is quite large:

304SS Hypotube

Nitinol Hypotube

Hypodermic Needle Tubing (Hypotube)

Laser-Cut Hypotube

Secondly, even just in terms of the materials themselves, there is a lot of depth:

For example, 304V​ is an upgraded evolution from 304L, with significantly improved torsional resistance. Another example is the powerful kink resistance of Nitinol metal, making it the best choice for navigating vessels with many sharp bends.

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Finally, various custom-cut patterns can be designed at will. By adjusting parameters such as cutting pitch, width, and slot shape, the hardness and flexibility can be balanced to target specific applications with precision.

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III. Expanding Applications: From Coronary to Broader Fields

In the past year or two, as the Hypotube has been continuously researched and developed, some delivery catheters and guide catheters in the aortic and neurovascular fields have begun to experiment with using it to complement or even replace plastic tubes. What they value are its strength, toughness, and wide plasticity. This is based on design innovation and also considers cost reduction.

Currently, high-precision Hypotubes are best produced in Ireland, with Creganna Medical being the most representative company. Domestically, a number of enterprises with strong grinding and cutting capabilities have also emerged, and they are striving to catch up on the path of exploring Hypotubes.

IV. Conclusion

The seemingly simple yet extremely special Hypotube - its potential is constantly being tapped along with the development of the medical industry, serving product design and clinical applications.

We believe this simple metal tube will surely radiate more residual heat and glory on the journey of medical advancement.