JPH01178045U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a block system diagram showing an embodiment of the extracorporeal circulation type lung assist device of this invention, Fig. 2 is a block system diagram showing the main parts of the embodiment of Fig.
4 is a flowchart showing the routine of the initial setting control program of the embodiment shown in FIG. 4. FIG. 4 is a flowchart showing the interrupt routine of the embodiment of FIG. 1. FIG. 5 is a background routine of the embodiment of FIG. Flowchart, FIG. 6 is a block system diagram showing a conventional extracorporeal circulation type lung assist device. 11... Diffusion tube, 20... First inert gas supply section, 20'... Second inert gas supply section, 22',
22″...Stop valve, 24...Gas flow meter, 30...
...PH adjustment liquid supply section, 31-31... Supply valve, 3
5-35...Level sensor, 36...Level sensor interface circuit, 40...Control unit, 6
0...Central processing unit, 61...Read-only memory, 6
2...I/O, 63...Anytime read/write memory, 6
4...Timer, 66...A/D converter, 67
...Output device drive circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Extracorporeally circulating blood from a patient whose blood has been removed by a blood pump is brought into contact with perfusate via a membrane in a dialyzer, and carbon dioxide components in the blood are transferred into the perfusate. The carbon dioxide component is brought into gas-liquid contact with an inert gas in the presence of a PH adjustment solution from a PH adjustment solution supply section of the perfusate and carbonic anhydrase to diffuse the carbon dioxide component as carbon dioxide gas, In an extracorporeal circulation type lung-type lung assist device in which the perfusate from which carbon dioxide has been removed is circulated between the above-mentioned diffusion cylinder and the above-mentioned dialyzer, a plurality of supply sections for the above-mentioned PH adjustment liquid are configured, and each Correspondingly, a supply piece is arranged to openly connect one of the above-mentioned supplies to the PH adjustment liquid supply line, so that it can be used when the amount of PH adjustment liquid in that supply becomes low or runs out. means for detecting, and means for driving a supply valve based on the detection signal to switch to another supply section to continue supplying the PH adjustment liquid of the perfusate;
An extracorporeal circulation type lung auxiliary device comprising: means for sequentially repeating the above-mentioned operations in response to the above-mentioned situations; and means for issuing an alarm when the amount of PH adjustment liquid in the last supply section corresponds to the above-mentioned situations. (2) The patient's extracorporeally circulating blood, which has been drained using a blood pump, is brought into contact with the perfusate through a membrane in the dialyzer, and the carbon dioxide component in the blood is moved into the perfusate and guided to the diffusion cylinder, which is used for perfusion. A perfusion liquid that has been removed by bringing the carbon dioxide component into gas-liquid contact with an inert gas in the presence of the PH adjustment liquid from the liquid PH adjustment liquid supply unit and carbonic anhydrase to diffuse the carbon dioxide component as carbon dioxide gas. In the extracorporeal circulation type lung assist device, which is used by circulating gas between the above-mentioned emission tube and the above-mentioned dialyzer, in addition to the above-mentioned inert gas supply line, a second inert gas supply line is provided, and a second inert gas supply line is provided. means for detecting when the supply of the first inert gas is stopped; means for automatically switching to the supply of the second inert gas based on the detection signal; and supply of the second inert gas. 1. An extracorporeal circulation type lung support device, characterized in that it is provided with means for issuing an alarm when the system stops.