Patient ventilators

Details Patient ventilators Patient ventilators

1979-05-08

1982-02-23

Recla, Henry J.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820715, 12820513, A61M 1600

Patent

active

043164587

ABSTRACT:
The present invention relates to a delivery tube array which is used to connect a patient to a patient ventilator. A problem arising in such use of patient ventilators is that exhaled air cannot be exhausted directly to the atmosphere since a normal outlet valve would also serve to exhaust air delivered on the compression stroke of the ventilator. The invention overcomes this problem by the introduction into a delivery tube array of a relief valve, a non-return valve 12 and a bleed-pipe which connects the relief valve to a point up-stream of the non-return valve. Such an arrangement ensures that the relief valve opens only when the pressure within the patient's lungs is greater than the pressure upstream of the non-return valve.

REFERENCES:
patent: 2834339 (1958-05-01), Bennett et al.
patent: 2841142 (1958-07-01), Hay
patent: 3368555 (1968-02-01), Beasley
patent: 3993059 (1976-11-01), Sjostrand

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