MULTIPLICATOR-SPOOL VALVE OF ARTIFICIAL PULMONARY VENTILATION Russian patent published in 2020 - IPC A61H31/00 F16K31/30 

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to multiplying slide valve of artificial pulmonary ventilation. Apparatus includes fixed stator equipped with n uniformly distributed in circumferential direction windows, and sliding on its inner surface rotor containing gas under excess pressure, equipped with mn+1 or mn-1 uniformly distributed in circumferential direction windows for direct or reverse ventilation respectively, where m is a multiplication factor - any natural number: m = 1, 2, 3, … . Total angular value of rotor and stator windows γ=γ_r+γ_s, where γ_r, γ_s are angular values of rotor and stator windows, respectively, must satisfy condition γ nδ, where δ - universal (depending only on numbers m, n) device characteristic: δ = 2π/n/(mn+1) - for direct ventilation, δ = 2π/n/(mn-1) - for reverse. Stator and rotor in longitudinal direction are made two-section, one section of which, compression, is interconnected with compressed oxygen mixture, and other - atmospheric - with ambient medium. Both stator sections have n identical angular value windows γ_s, connected to respiratory tubes of inhalation and exhalation, which are connected to tees of patients at other ends. Compression section of rotor has windows of angular value γ_r= nδ/(1+b/a)-γ_s, and atmospheric value -γ_r = nδ/(1+a/b)-γ_s, where a/b is the inhalation and exhalation ratio. These sections of rotor-slide valve are turned relative to each other by angle nδ/(1+b/a) and separated by bearing circular plate. Rotor rpm makes f = ν/(mn+1) for direct ventilation and f = ν/(mn-1) - for reverse, where ν - required respiratory rate.

EFFECT: providing optimal mode of artificial pulmonary ventilation apparatus with rotary multi-window rotor-valve by criterion of respiratory circuits maintenance, simple economical spool distribution of the oxygen mixture under low excess pressure immediately along several respiratory circuits, possibility of varying the respiratory rate, optimizing the shape of pressure curves in the respiratory circuits by the respiratory failure arrest criterion and providing high-frequency mechanical ventilation with respiratory rate of up to 3000 cycles per minute.

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