Medical aspirating apparatus with multi-lumen catheter tube and methods
US5029580A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1990 |
| Grant date | Jul 9, 1991 |
| Priority date | — |
| Expiry date | Jul 18, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/6063
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An aspirating/ventilating or aspirating apparatus comprising multi-lumen catheter tubes, for evacuation of lung secretions and for other functions as well. Two and three lumen catheter tubes which comprise three unique distal catheter end structures are disclosed. Material comprising oxygen-containing gas is introduced into the lungs under positive pressure through a first lumen of the catheter tube at a predetermined rate while secretions (and gas) are simultaneously aspirated from the lung into a second lumen by force of negative pressure. Oxygen gas inflow is controlled to equal gas outflow to maintain the partial pressure of oxygen into the lung at a high respiratory level. In a first distal catheter end structure, an oxygen-containing gas is introduced through the first lumen as a circumscribing jet around the second lumen to provide fluid flow turbulence external to a second lumen to improve homogenization of localized secretions resulting in more efficient aspiration. In a second distal catheter end structure, oxygen gas inflow is introduced into a common chamber at the distal end of the catheter, where effluent secretions are being aspirated, causing gas produced homogeniza…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.