초록 ▼

A method for providing assisted ventilation which avoids hypoxia and hypocapnia is disclosed, in which a predetermined dead space in an assisted ventilation system is provided external to the patient. The method may also be used to create normocapnia or moderate hypercapnia without causing hypoxia d

A method for providing assisted ventilation which avoids hypoxia and hypocapnia is disclosed, in which a predetermined dead space in an assisted ventilation system is provided external to the patient. The method may also be used to create normocapnia or moderate hypercapnia without causing hypoxia during assisted ventilation. Preferably, hypoxia can be avoided while inducing and/or maintaining the arterial carbon dioxide tension between about 35 and 95 mmHg. Dead space volumes as small as 10 ml and exceeding 150 ml are utilized in the method. An improved proximal terminal, tubular attachments, and coaxial filter are disclosed, which are safer the less expensive to use than prior art unilimb assisted ventilation systems; the devices of the present invention also reduce medical wastes in comparison to prior art assisted ventilation systems. An interface is provided, which incorporates the proximal terminal and other functional devices, to which tubular respiratory conduits of predetermined and/or adjustable dead space volumes can be connected.

대표청구항 ▼

[ What is claimed is:] [1.] A respiratory or ventilator proximal terminal for use in a unilimb artificial respiration device, comprising:a unitary housing constructed of a rigid material, said housing comprising a first port, a second port, a third port, a fourth port, an outer tube and an inner tub

[ What is claimed is:] [1.] A respiratory or ventilator proximal terminal for use in a unilimb artificial respiration device, comprising:a unitary housing constructed of a rigid material, said housing comprising a first port, a second port, a third port, a fourth port, an outer tube and an inner tube;said outer tube and inner tube each having a first end and a second end, at least a portion of said inner tube being disposed within said outer tube, said second end of said inner tube having a smaller external diameter than the internal diameter of said second end of said outer tube,said second end of the said outer tube forming said first port, said second end of said inner tube forming said second port, said first port having an opening which defines a first plane, wherein said second port has an opening which defines a second plane, said first plane and said second plane being substantially coplanar, wherein said second port is surrounded by said first port,said first end of said inner tube being sealably bonded into said third port, wherein inspiratory or expiratory gases entering said third port may only pass through said inner tube and exit from said second port, said first end of said outer tube forming said fourth port, said third and fourth ports entering said housing at different locations, wherein inspiratory or expiratory gases entering said fourth port may only pass between the interior of said outer tube and the exterior of said inner tube and may only exit through said first port.