System for monitoring therapy during calibration

Details System for monitoring therapy during calibration System for monitoring therapy during calibration

1996-12-13

1998-05-19

Millin, Vincent

Surgery

Respiratory method or device

Means for mixing treating agent with respiratory gas

12820324, 12820325, A61M 1500

Patent

active

057525048

ABSTRACT:
A system for continuing the monitoring of certain gases delivered to a patient during the administration of nitric oxide to provide therapy to the patient. The nitric oxide is controlled by a electrically operated valve that is operated by means of an electrical signal from a CPU. At times when the various gas monitors are being calibrated, the normal alarms based upon those gas monitors are conventionally disabled during that calibration time. With the present invention, the electrical signal to the electrically operated valve is detected at the time the system goes into a calibration cycle and that detected electrical signal is used to establish limits such as a upper limit and a lower limit. Therefore, when the electrical signal to the valve is thereafter monitored and its value exceeds either of those limits, the overall nitric oxide delivery system will activate an alarm to alert the user of an abnormal condition. Thus an alarm system is present even when the various gas monitors are otherwise taken out of the system during their calibration.

REFERENCES:
patent: 5253640 (1993-10-01), Falb et al.
patent: 5471977 (1995-12-01), Olsson et al.
patent: 5522381 (1996-06-01), Olsson et al.
patent: 5531218 (1996-07-01), Krebs
patent: 5540233 (1996-07-01), Larsson et al.
patent: 5558083 (1996-09-01), Bathe et al.
patent: 5615669 (1997-04-01), Olsson et al.

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