Monitoring process for metering different gaseous anesthetics

• US 6,725,860 B2
• Filed: 02/07/2001
• Issued: 04/27/2004
• Est. Priority Date: 02/07/2001
• Status: Expired due to Fees

• Current Assignee: Drager Medizintechnik GmbH
• Original Assignee: Drager Medizintechnik GmbH
• Inventors: Scharmer, Ernst-Günter, Gottschalk, Frank, Thiemann, Helmut, Wallroth, Carl F.
• Primary Examiner(s): WEISS JR, JOSEPH
• Application Number:
  US09/778,616
• Publication Number:
  US 20020104534A1
• Time in Patent Office: 1,175 Days
• Field of Search: 128/200.24, 128/203.12, 128/203.13, 128/203.24, 128/203.23, 128/203.27
• US Class Current: 128/203.25
• CPC Class Codes: A61M 16/14 by mixing different fluids, one of them being in a liquid phase
• CPC Class Codes: A61M 16/18 Vaporising devices for anaesthetic preparations
• CPC Class Codes: A61M 2016/1035 the anaesthetic agent concentration

Abstract

A monitoring process for the reliable metering of different gaseous anesthetics uses a gaseous anesthetic monitor designed as only a single-channel monitor for determining the concentration of only one gaseous anesthetic. The process also uses an associated gaseous anesthetic metering means.

Claims

1. A monitoring device, comprising:

an anesthetic metering device;

a gas specific filling device connected to said anesthetic metering device;

a single-channel for supplying gas to a respirator;

a measurement device for determining the anesthetic concentration in said single channel wherein the measurement device has only a single-channel for the concentration measurement of only one gaseous anesthetic;

a display device connected to said measurement device, said display device querying an operator to select a gas for continued operation of said gas monitor, receiving an answer from the operator indicating a selected gas, comparing said selected gas to a previous gas, indicating an alarm if said selected gas is different than said previous gas, querying the operator to acknowledge a change in gas monitored by said gas monitor or to select another gas, receiving either an acknowledgment answer from the operator indicating acknowledgment of said change in gas, or a corrected answer selecting another gas;

said measurement device monitoring gas passing through said gas monitor according to measuring constants for said selected gas after said display device receives either said acknowledgment answer or said corrected answer.

2. A monitoring process for metering different gaseous anesthetics with a gaseous anesthetic monitor for determining the concentration of only one gaseous anesthetic with an associated gaseous anesthetic metering device, the process comprising the steps of:

switching the gaseous anesthetic monitor on or activating the monitor from a standby mode by a switching signal;

providing a subsequent display for selecting a gaseous anesthetic and one of selecting and confirming the selection of either a new, second gaseous anesthetic, or selection of the first gaseous anesthetic used previously;

performing a concentration measurement with the measuring constants stored for the first gaseous anesthetic, in the case of the selection of the first gaseous anesthetic;

triggering an alarm in the case of the selection of said new second gaseous anesthetic and displaying the fact that a gaseous anesthetic mixture was selected is displayed and one of;

acknowledging the alarm wherein the concentration measurement takes place with the measuring constants stored for the new second gaseous anesthetic;

or correcting the selection and selecting a third gaseous anesthetic and subsequently performing the concentration measurement with the measuring constants stored for said third gaseous anesthetic.

3. A monitoring process in accordance with claim 2, wherein the gaseous anesthetics are selected from the group comprising the gases halothane, enflurane, isoflurane, desflurane, and servoflurane.

4. A monitoring process in accordance with claim 3, wherein the gaseous anesthetics are selected on the gaseous anesthetic monitor by means of a rotatable acknowledge switch or by means of contact-sensitive display screen segments.

5. A monitoring process in accordance with claim 4, wherein the concentration of the gaseous anesthetics is measured according to an infrared optical or piezoelectric measurement process.

6. A monitoring process in accordance with claim 3, wherein the gaseous anesthetic metering device has one or more filling devices specific of gaseous anesthetics.

7. A monitoring process in accordance with claim 2, wherein the gaseous anesthetics are selected on the gaseous anesthetic monitor by means of a rotatable acknowledge switch or by means of contact-sensitive display screen segments.

8. A monitoring process in accordance with claim 7, wherein the gaseous anesthetic metering device has one or more filling devices specific of gaseous anesthetics.

9. A monitoring process in accordance with claim 3, wherein the concentration of the gaseous anesthetics is measured according to an infrared optical or piezoelectric measurement process.

10. A monitoring process in accordance with claim 2, wherein the gaseous anesthetic metering device has one or more filling devices specific of gaseous anesthetics.

11. A monitoring process in accordance with claim 10, wherein the concentration of the gaseous anesthetics is measured according to an infrared optical or piezoelectric measurement process.

12. A monitoring process in accordance with claim 2, wherein the concentration of the gaseous anesthetics is measured according to an infrared optical or piezoelectric measurement process.

13. A monitoring process in accordance with claim 4, wherein the gaseous anesthetic metering device has one or more filling devices specific of gaseous anesthetics.

14. A method in accordance with claim 2, wherein:

said acknowledging is performed by a human operator intervening with said gaseous anesthetic monitor.

15. A monitoring process for metering different gaseous anesthetics with a gaseous anesthetic monitor for determining the concentration of only one gaseous anesthetic with an associated gaseous anesthetic metering device, the process comprising the steps of:

using the aesthetic monitor with a first gas;

receiving an activation signal from an operator for the aesthetic monitor;

querying the operator to select a gas for continued operation of the monitor;

receiving an answer from the operator indicating a selected gas;

comparing said selected gas to said first gas;

triggering an alarm if said selected gas is different than said first gas and displaying that a gaseous anesthetic mixture was selected;

querying the operator to acknowledge a change in gas monitored by said gas monitor or to select another gas;

receiving an acknowledgment answer from the operator indicating acknowledgment of said change in gas;

measuring the concentration of gas passing through said gas monitor according to measuring constants for said selected gas.

16. A method in accordance with claim 15, wherein:

said measuring, receiving and querying are performed by said gas monitor.

17. A method in accordance with claim 15, wherein:

said gas monitor is a single channel gas monitor,

a corrected answer is alternately receivable instead of said acknowledgment answer, said corrected answer indicating another gas for continued operation of the gas monitor;

said measuring of gas passing through the gas monitor being performed after receiving said corrected answer according to measuring constants for said another gas.

18. A method in accordance with claim 15, further comprising:

directly monitoring gas passing through said gas monitor according to measuring constants for said first gas, if said selected gas is identical to said first gas.

19. A process in accordance with claim 15, wherein:

said querying to acknowledge is performed after said triggering of said alarm;

said measuring according to said selected gas is performed after said receiving of said acknowledgment answer;

said querying to select a gas is performed after said receiving of said activation signal.

20. A method in accordance with claim 19, wherein:

all of said measuring, receiving and querying are performed by said gas monitor.