Catheter shaft with uniform bending stiffness circumferentially
US12138400B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 16, 2023 |
| Grant date | Nov 12, 2024 |
| Priority date | — |
| Expiry date | Oct 16, 2043 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/7542
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A catheter shaft includes an inner layer defining an innermost circumferential surface of the catheter shaft and defining a lumen of the catheter shaft, and an outer layer defining an outermost circumferential surface of the catheter shaft. The inner layer is formed by a first polymer having a first durometer and a first melting temperature. The outer layer is formed by alternating first and second segments of the first polymer and a second polymer, respectively, that alternate in a circumferential direction. The second polymer has a second durometer softer than the first durometer and a second melting temperature lower than the first melting temperature. Each segment of the alternating first and second segments extend in an axial direction for substantially an entire length of the catheter shaft. A method of forming the catheter shaft via extrusion is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.