Infusion apparatus and method

Details Infusion apparatus and method Infusion apparatus and method

1979-02-05

1980-03-18

Michell, Robert W.

Surgery

Respiratory method or device

Respiratory gas supply means enters mouth or tracheotomy...

128214F, A61M 3100

Patent

active

041933974

ABSTRACT:
An infusion apparatus and method employs an infusate reservoir connected by way of a first flow restrictor to a mixing chamber and a second infusate reservoir connected via a second flow path having a selected restriction characteristic to the same mixing chamber so that infusate may be conveyed to the mixing chamber in different concentrations or in different types. A normally closed valve is provided in the second flow path so that the two infusates supplement one another in the mixing chamber only when the valve is opened. The reservoir and chamber volumes, infusate concentrations and chamber outlet flow rates are dimensioned to provide an integrated dosage profile suited to the patient. The apparatus can also include an accumulator with a restricted inlet in the second flow path situated between the second reservoir and the valve so that when the valve is opened, infusate flows to the mixing chamber from the second flow path only if the accumulator has been replenished from the second reservoir.

REFERENCES:
patent: 3840009 (1974-10-01), Michaels et al.
patent: 3923060 (1975-12-01), Ellinwood, Jr.
patent: 4013074 (1977-03-01), Siposs
patent: 4056095 (1977-11-01), Rey et al.
patent: 4077405 (1978-03-01), Haerten et al.
patent: 4137913 (1979-02-01), Georgi
patent: 4146029 (1979-03-01), Ellinwood, Jr.

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