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Q: What is a tapered tube?

A: It is very common for catheters to have a smaller diameter at the distal end and a larger diameter on the proximal end. The smaller end enables the operator to position the catheter into deep small internal veins of the body without doing any damage. The larger proximal end allows the operator more material to push against and also better access for external devices and procedures. The tube along the length goes from a slow transition from the thicker section to a thinner section. In addition to this transition, designers may also use multiple durometers along the length which can also impact the stiffness and flexibility of the material. It is possible to have multiple tapered transitions along the length of a product. The process is not limited to only one transition. This is also frequently called bump tubing. It is used for vascular access catheters, delivery catheters, drainage catheters, endoscopy and urology devices and dialysis catheters.

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