[54] POSITIVE PRESSURE BREATHING CIRCUIT
[76] Inventor: Bernard P. Palush, 1607 E. Cedar Ln., Mount Prospect, 111. 60056
[22] Filed: Mar. 18, 1974
[21] Appl. No.: 451,855
[52] U.S. CI 128/145.8, 128/188
[51] Int. CI A61m 17/00
[58] Field of Search 128/145.8, 146.5, 146.4,
128/145.5, 142.2, 142.3, 191 R, 188, 187, 186, 193, 194, 351, 351 BV; 251/5; 138/93 R; 261/116, 120, DIG. 65
[56] References Cited
UNITED STATES PATENTS
1,510,212 9/1924 DuBois 138/93
3,504,676 4/1970 Lomholt 128/351
3,814,091 6/1974 Henkin 128/145.8
FOREIGN PATENTS OR APPLICATIONS
520,342 7/1920 France 128/191 R
Primary Examiner—Richard A. Gaudet
Assistant Examiner—Henry J. Recla
Attorney, Agent, or Firm—Dominik, Knechtel, Godula
& Demeur
[57] ABSTRACT
A positive pressure breathing circuit for operation in conjunction with a positive pressure ventilator including a concentrically oriented inhalation/exhalation circuit having an inner inhalation tube and an outer exhalation tube, the tubes being positioned in concentric and spaced orientation, the inhalation tube being further provided with an inhalation unidirectional valve means for providing unidirectional gas flow through the inhalation tube, the exhalation tube being provided with an exhalation unidirectional valve means associated therewith for providing unidirectional gas flow through the exhalation tube, and an inflatable occlusion means interposed between the inner and outer tubes in fluid communication with a source of pressurized fluid, such that the inflatable occlusion means is alternatively inflatable and deflatable in response to fluid pressure from the source thereof, the gas flow in the inhalation tube being countercurrent with respect to the gas flow in the exhalation tube, and the circuit further being provided with disengagably mountable nebulizer means in cartridge form and in fluid communication with the inhalation tube, such that atomized medicinal fluids may be introduced into the inhalation tube during the respiratory therapy.
34 Claims, 14 Drawing Figures
