Methods and apparatus for reducing tracheal infection using subglottic irrigation, drainage and servoregulation of endotracheal tube cuff pressure
US5582167A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 2, 1994 |
| Grant date | Dec 10, 1996 |
| Priority date | — |
| Expiry date | Mar 2, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M16/0438
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An integrated system providing a mechanical and chemical barrier against the spread of infected secretions into the distal trachea is disclosed. An endotracheal tube used for patient airway management and provides a means to conveniently irrigate and drain the subglottic region below the vocal cords and above an inflated cuff. The subglottic region accumulates liquid secretions that may channel past an inflated endotracheal tube cuff, providing the necessary bacterial inoculum leading to bronchitis and nosocomial pneumonia. An irrigation channel delivers liquids such as saline or antibiotic and antifungal medications for mucosal hydration, and bactericidal action against infected subglottic secretions. An outer sleeve surrounding the endotracheal tube forms a suction lumen for removing the secretions. The tapered and compliant nature of this sleeve at body temperature allows a large suction channel without the need to greatly enlarge the outside diameter of the endotracheal tube at the vocal cord level. Electronic and mechanical controls provide regulated volume infusion and regulated suction. In addition, cuff pressure is servoregulated to the lowest pressure that provides a trach…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.