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 unilimb respiratory conduit for use in an assisted ventilation system having an inspiratory gas input and exhaust outlet, comprising:an outer flexible tube,an inner flexible tube, said outer flexible tube and inner flexible tube each having a proximal end and a distal e

[ What is claimed is:] [1.] A unilimb respiratory conduit for use in an assisted ventilation system having an inspiratory gas input and exhaust outlet, comprising:an outer flexible tube,an inner flexible tube, said outer flexible tube and inner flexible tube each having a proximal end and a distal end; the outer diameter of said inner flexible tube being smaller than the inner diameter of said outer flexible tube, said inner flexible tube being at least partially disposed within said outer flexible tube, said distal end of said inner flexible tube being disposed within and in direct fluid communication with said outer flexible tube, anda proximal fitting, said unilimb respiratory conduit having a distal end and a proximal end, said proximal fitting located at said proximal end of said unilimb respiratory conduit, and comprising an inner pipe and an outer pipe maintained in fixed coaxial spaced relationship by spacing means, said outer pipe and inner pipe each having a proximal end and a distal end, wherein said distal end of said inner pipe is operably connected to said proximal end of said inner flexible tube and said distal end of said outer pipe is operably connected to said proximal end of said outer flexible tube,said proximal end of one of said pipes capable of being operably connected to an inspiratory gas input of the assisted ventilation system while said proximal end of the other one of said pipes is simultaneously operably connectable to an exhaust outlet, andwherein said distal end of said unilimb respiratory conduit can be operably connected to an airway device connected to a mammal, and wherein a user may connect said proximal fitting to an assisted ventilation system in order to use said unilimb respiratory conduit to provide inspiratory gases and exhaust expiratory gases from a mammal, and may disconnect said proximal fitting from the assisted ventilation system after use.