Patent EA-005171-B1 (EA)
Title: Sealed back pressure breathing device
IPC: A61M11/06
Filed: 2001-10-24
Abstract: 1. A sealed back pressure device for assisting a respiratory function of a patient, comprising: an elongated hollow body having a first normally open end, a second normally closed end, an intake port and an exhalation port; a one-way exhalation valve mounted inside the hollow body for allowing exhaust gas to be exhaled through the exhalation port; a compression spring mounted between the exhalation valve and the closed end for regulating resistance to gas flow being exhaled by the patient; a means mounted on the second end of the hollow body for adjusting compression of the spring; and an intake valve mounted between said open end and said exhalation valve. 2. The device of Claim 1, wherein said adjusting means comprises a cap detachably mounted on the second end, said cap providing a first abutting surface for said compression spring. 3. The device of Claim 2, wherein said exhalation valve is supported by a frame mounted in the hollow body, said frame providing a second abutting surface for said compression spring. 4. The device of Claim 2, wherein said cap adjustably compresses said compression spring to maintain a positive back pressure of between 5 and 20 centimeters of water. 5. The device of Claim 3, wherein said hollow body is provided with an annular shoulder extending into a central opening formed by the hollow body, and wherein said frame contacts said shoulder, thereby preventing sliding movement of the frame toward said open end. 6. The device of Claim 1, wherein bald open end is provided with a mouthpiece for engagement by tips of the patient. 7. The device of Claim 1, wherein said adjusting means comprises a sliding piston movable inside said hollow body, said piston providing an abutment surface for said compression spring. 8. The device of claim 7, wherein an adjustable cam lever is mounted on said piston for adjusting resistance to an exhalation gas flow. 9. The device of Claim 8, wherein said cam lever is adjustable to maintain a positive back pressure in the range of between 5 and 10 centimeters of water. 10. The device of Claim 1, wherein said hollow body is adapted for attachment to a nebulizer for establishing fluid communication between said hollow body and the nebulizer for delivery of medication to airways of the patient. 11. A sealed back pressure device for assisting respiratory functions of a patient, comprising: an elongated hollow body having a first normally open end, a second normally closed end, an intake port and an exhalation port; a one-way exhalation valve carried by a supporting bracket and mounted inside the hollow body far allowing exhaust gas to be exhaled through the exhalation port; a compression spring mounted between the exhalation valve and the closed end for maintaining a positive back pressure and regulating resistance to gas flow being exhaled by the patient; an intake valve mounted between said open end and said exhalation valve; and a means mounted on the second end of the hollow body for adjusting compression of the spring, said adjusting means comprising a cap detachably mounted on the second end, said cap providing a first abutting surface for said compression spring, said support bracket providing a second abutting surface for said compression spring. 12. The device of Claim 11, wherein said open end is provided with a mouthpiece for engagement by lips of the patient. 13. The device of Claim 11, wherein said cap is threadably engageable with the second end of the hollow body. 14. The device of Claim 11, wherein said cap adjustably compresses said compression spring to maintain a positive back pressure of between 5 and 20 centimeters of water. 15. The device of Claim 11, wherein said hollow body is provided with an annular shoulder extending into a central opening formed by the hollow body, and wherein said support bracket contacts said shoulder, thereby preventing sliding movement of the support bracket toward said open end.