Method for monitoring the condition of a patient

• US 5,482,035 A
• Filed: 03/17/1994
• Issued: 01/09/1996
• Est. Priority Date: 03/19/1993
• Status: Expired due to Fees

• Current Assignee: Instrumentarium Dental Incorporated (Envista Holdings Corporation)
• Original Assignee: Instrumentarium Dental Incorporated (Envista Holdings Corporation)
• Inventors: Paloheimo, Markku
• Primary Examiner(s): Sykes, Angela D.
• Assistant Examiner(s): HUANG, STEPHEN D
• Application Number:
  US08/214,641
• Time in Patent Office: 663 Days
• Field of Search: 128/630, 128/898
• US Class Current: 600/310
• CPC Class Codes: A61B 5/02 Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure

Abstract

The invention relates to a method for anticipating a change occurring in the condition of a patient'"'"'s organism before the condition of a patient reaches a critical point, the condition of a patient'"'"'s organism being monitored by the application of an appropriate measuring method and the determinations according to said measuring method being effected at appropriate time intervals. The measuring results obtained on the basis of effected measurements, the number of which must be at least two, or quantities derived therefrom are utilized for predicting the future development of one or more measuring results and, if a measuring result according to the prediction indicates that a limit value representing a predetermined critical point is reached in the condition of a patient within a predetermined period of time, a warning signal is released indicating that this critical point is being approached.

Claims

1. A method for monitoring a patient and anticipating a change occurring in a condition of a patient'"'"'s organism before the condition of a patient reaches a critical point, said method comprising the steps of:

monitoring and measuring at least one patient characteristic at specified time intervals to create a series of characteristic signals indicative of a condition of the patient'"'"'s organism;

applying a computational measuring method to at least two of the characteristic signals thereby creating at least one measuring result signal;

determining, according to the measuring result signal a change occurring in the condition of the patient;

predicting a future condition of the patient'"'"'s organism based on the change in the condition of the patient;

setting a limit value representing a predetermined critical point in the condition of the patient;

setting a predetermined period of time in which it is desired to track a future condition with respect to the limit value; and

generating a warning signal if a predicted future condition indicates that the limit value representing a predetermined critical point will be reached within the predetermined period of time, thereby indicating that the critical point is being approached by the monitored and measured patient characteristic thereby permitting preventive treatment to the patient.

2. A method as set forth in claim 1, characterized in that the limit value representing the critical point is further defined as a higher and/or lower limit value than an acceptable numerical quantity level of the monitored patient characteristic.

3. A method as set forth in claim 1, characterized in that the warning signal is generated when the measuring result signal representing the condition of a patient breaks the limit value representing the critical point.

4. A method as set forth in claim 1, characterized in that the predicting of a future condition is carried out on the basis of at least two measurements effected at different times, the measurements having been effected by the application of a common measuring method.

5. A method as set forth in claim 1, characterized in that the predicting of a future condition is carried out on the basis of at least two successive accepted measurements.

6. A method as set forth in claim 1, characterized in that the measuring result signals are arranged in at least two groups, each group having at least two measuring result signals, and the measuring result included in such a group are worked into one common measuring result signal representing such measuring result signals, the future condition of a measuring result signal being predicted on the basis of the measuring result signals representing the groups.

7. A method as set forth in claim 6, characterized in that the measuring result signals included in a group comprise the results of successive sequential accepted measuring processes.

8. A method as set forth in claim 4, characterized in that the predetermined period of time wherein the warning signal is generated indicating that the limit value representing the predetermined critical point in the condition of a patient is reached, is at least as long as a time between the effected measurements.

9. A method as set forth in claim 4, characterized in that the predetermined period of time wherein the warning signal is generated indicating that the limit value representing the predetermined critical point in the condition of a patient is reached, is at least as long as an added time lapse between measurements required for a group of measurements to be set up from the measuring result signals.

10. A method as set forth in claim 4, characterized in that the predetermined period of time wherein a warning signal is generated indicating that the limit value representing the predetermined critical point in the condition of a patient is reached, is calculated from such an effected measurement that a measuring result signal obtained therefrom is used when predicting the future condition of one or more measuring result signals.

11. A method as set forth in claim 4, characterized in that the predetermined period of time wherein a warning signal is generated indicating that the limit value representing the predetermined critical point in the condition of a patient is reached, is calculated from such a latest effected measurement that a measuring result signal obtained therefrom is used when predicting the future condition of one or more measuring result signals.

12. A method as set forth in claim 1 characterized in that the warning signal comprises a visible signal.

13. A method as set forth in claim 1 characterized in that the warning signal comprises a sound signal.

14. A method as set forth in claim 1 characterized in that the alarm signal comprises a visible signal.

15. A method as set forth in claim 2, characterized in that the warning signal is generated when the measuring result signal representing the condition of a patient breaks the limit value representing the critical point.

16. A method as set forth in claim 15, characterized in that the warning signal comprises a visible signal.

17. A method as set forth in claim 15, characterized in that the warning signal comprises a sound signal.