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 and 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 system for use in mammals to provide thereto and exhaust therefrom respiratory gases, comprising:a first breathing conduit having a proximal end and a distal end for providing and exhausting respiratory gases from a mammal, said first breathing conduit being flexible, i

[ What is claimed is:] [1.] A system for use in mammals to provide thereto and exhaust therefrom respiratory gases, comprising:a first breathing conduit having a proximal end and a distal end for providing and exhausting respiratory gases from a mammal, said first breathing conduit being flexible, interface means comprising a proximal terminal operably connected to said proximal end of said first breathing conduit,means for preventing biological contamination within said first breathing conduit from communication with said interface means, said means for preventing biological contamination being operably connected to or disposed within said proximal end of said first breathing conduit,said proximal terminal comprising a rigid housing, said housing comprising an inspiratory gas input, an expiratory gas outlet, and a first respiratory port, said first respiratory port being in fluid communication through said means for preventing biological contamination with said first breathing conduit when said breathing conduit is in operable connection with said interface,said proximal terminal further comprising a rigid outer tube, and a rigid inner tube, said outer tube and inner tube each having a first end and a second end, said inner tube being at least partially disposed within said outer tube,said second end of said inner tube being disposed within said outer tube, said outer tube being connected at its second end to said first respiratory port, andsaid first end of one of said tubes being connected to said inspiratory gas input, and said first end of one of said tubes being connected to said exhaust outlet, the outer diameter of said inner tube being smaller than the inner diameter of said outer tube,wherein said first breathing conduit is detachable from said interface for disposal or sterilization.