Valve
First Claim
1. A valve, comprising:
- an inner fluid flow passage;
an outer fluid flow passage surrounding and being substantially parallel to said inner fluid flow passage, said inner fluid flow passage and said outer fluid flow passage being connected to a common flow conduit and having fluid flow therein in respectively opposite directions relative to said common flow conduit, and said inner fluid flow passage having an outer surface and said outer fluid flow passage having an inner surface facing said outer surface; and
an inflatable cuff attached to one of said inner and outer surfaces and being inflatable to form a fluid-tight seal against the other of said inner and outer surfaces, to block flow of fluid through said outer fluid flow passage.
2 Assignments
0 Petitions
Accused Products
Abstract
A valve, particularly suited for use with a patient ventilation system to regulate respiration gas flow to and from the lungs of a patient has a substantially parallel, co-axial, arrangement of inner and outer fluid flow passages for conducting gas through the valve to and from a common flow conduit connected to the patient'"'"'s lungs, each passage having gas flowing therein in a different direction. A cuff is provided which is inflatable to control the flow of fluid through the valve. The cuff is disposed so as to be able to form a fluid-tight seal against one or other of the facing surfaces of the inner and the outer flow passages when inflated, and to block flow through the outer passage in a timed relationship with the breathing cycle of the patient.
29 Citations
8 Claims
-
1. A valve, comprising:
-
an inner fluid flow passage;
an outer fluid flow passage surrounding and being substantially parallel to said inner fluid flow passage, said inner fluid flow passage and said outer fluid flow passage being connected to a common flow conduit and having fluid flow therein in respectively opposite directions relative to said common flow conduit, and said inner fluid flow passage having an outer surface and said outer fluid flow passage having an inner surface facing said outer surface; and
an inflatable cuff attached to one of said inner and outer surfaces and being inflatable to form a fluid-tight seal against the other of said inner and outer surfaces, to block flow of fluid through said outer fluid flow passage. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A ventilation tubing circuit comprising:
-
an inspiration gas line having a first end connectable to a source of inspiration gas;
an expiration gas line having a first end connectable with an expiration gas receiver;
a flow conduit, connected to said inspiration gas line and said expiration gas line and adapted for connection to an airway of a patient;
a valve comprising an inner fluid flow passage, an outer fluid flow passage surrounding and being substantially parallel to said inner fluid flow passage, said inner fluid flow passage and said outer fluid flow passage being connected to said flow conduit and having fluid flow therein in respectively opposite directions relative to said flow conduit, said inner fluid flow passage having an outer surface and said outer fluid flow passage having an inner surface facing said outer surface opposed, facing surfaces, and an inflatable cuff attached to one of said inner and outer surfaces which is inflatable to form a fluid-tight seal against the other of said inner and outer surfaces, to block flow of fluid through said outer fluid flow passage; and
said inner fluid flow passage of said valve being connected to a second end of one of said inspiration line and said expiration line, and said outer fluid flow passage of said valve being connected to a second end of the other of said inspiration line and said expiration line, to conduct respiration gases through said valve to and from said flow conduit. - View Dependent Claims (8)
-
Specification