https://admin1.seo.com.cn/CustomerAdmin/S_News/Create?ru=%2FCustomerAdmin%2FS_News%2F

In the practical application of Percutaneous Transhepatic Cholangiography (PTC), the Chiba needle is not a single-specification product, but a precision medical device available in various sizes, materials, and craftsmanship options. Selecting the right Chiba needle based on specific clinical scenarios is a critical step in ensuring procedural success. Currently, mainstream Chiba needles on the market are primarily made of medical-grade 304 or 316L stainless steel, both offering excellent biocompatibility and corrosion resistance. High-end product lines may also introduce Nitinol (nickel-titanium alloy), utilizing its superelastic properties to enhance kink resistance-particularly suitable for complex cases requiring longer puncture paths.

In terms of specifications, the Gauge value (G) determines the outer diameter. In PTC procedures, 22G is the most commonly used specification; its 0.7 mm outer diameter achieves the optimal balance between puncture trauma and mechanical strength. For patients with extremely prominent and superficially located bile duct dilation, some experts opt for a 23G Chiba needle to further minimize trauma. For livers with severe fibrosis or cases requiring the introduction of stiffer guidewires through the puncture needle, a 21G or even 20G Chiba needle may be selected. Length selection is equally critical: standard 15 cm or 20 cm lengths suffice for most adult patients, but obese patients or those requiring special puncture trajectories may necessitate extended models of 25 cm or even 30 cm.

Beyond basic dimensional parameters, differences in manufacturing processes directly impact Chiba needle performance in PTC. A high-quality Chiba needle undergoes precision tube forming, high-accuracy bevel grinding, and electropolishing. The tip grinding process, in particular, is paramount-a uniformly sharp bevel significantly reduces tissue resistance during puncture, making it easier for the physician to perceive the subtle breakthrough sensation upon penetrating the bile duct wall. Internal lumen polishing ensures smooth contrast injection without turbulence, yielding clear cholangiographic images. Additionally, laser-etched depth markings on the shaft and ergonomic anti-slip hub designs provide great convenience during prolonged, high-precision procedures. Therefore, when selecting a Chiba needle, healthcare institutions must consider not only pricing but also comprehensively evaluate material, craftsmanship, and alignment with their clinical needs. Only by doing so can they maximize the technical advantages of the Chiba needle in PTC and provide safer medical services to patients.