Infusion catheter with uniform distribution of fluids
US5425723A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1993 |
| Grant date | Jun 20, 1995 |
| Priority date | — |
| Expiry date | Dec 30, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2206/10
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An infusion catheter including an elongated catheter body, and an infusion section at its distal end for delivery of therapeutic fluid to bodily passages. The infusion section includes an outer tube and an inner tube concentric with the outer tube, each tube having a multiplicity of ports therethrough. The inner tube delimits a central, fluid delivery lumen. The inner tube is uniformly spaced apart from the outer tube to provide an annular passageway, the radial depth of the passageway being sufficient to permit fluid flow therewithin. Each of the ports through the outer tube provides fluid communication between the annular passageway and the exterior of the catheter, while each of the ports through the inner tube provides fluid communication between the central lumen and the annular passageway. Thus, therapeutic fluid can flow from the central lumen through the annular passageway to the catheter exterior. The catheter provides a uniform average flow rate of therapeutic fluid along the length of the infusion section by (a) providing a higher ratio of inner tube ports to outer tube ports in the distal portion than in the proximal portion of the infusion section, and/or (b) positioni…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.