CPR device and method with structure for increasing the duration and magnitude of negative intrathoracic pressures
US5551420A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1993 |
| Grant date | Sep 3, 1996 |
| Priority date | — |
| Expiry date | Nov 9, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M16/0495
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
According to the invention, methods and devices for increasing cardiopulmonary circulation induced by chest compression and decompression when performing cardiopulmonary resuscitation are provided. Cardiopulmonary circulation is increased according to the invention by impeding air flow into a patient's lungs to enhance the extent and duration of negative intrathoracic pressure during decompression of the patient's chest. Enhanced extent and duration of negative of intrathoracic pressure thus promotes venous blood flow into the heart and lungs from the peripheral venous vasculature. In one embodiment, impeding the air flow into the patient's lungs is accomplished by placing a ventilation tube in the patient's airway. The ventilation tube contains either a flow restrictive orifice disposed within or connected in series with a lumen of the ventilation tube, or a pressure-responsive valve within a lumen of the tube to impede the inflow of air. In a preferred embodiment, the patient's mouth and nose are covered with a facial mask which can impede air flow into the patient's airway. Also provided is an improved endotracheal tube to allow air to be impeded from flowing to the patient's lu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.