System for performing an analysis of pressure-signals derivable from pressure measurements on or in a body

• US 20070060836A1
• Filed: 11/17/2006
• Published: 03/15/2007
• Est. Priority Date: 04/30/2001
• Status: Active Grant

• Current Assignee: Per Eide
• Original Assignee: Per Eide
• Inventors: Eide, Per
• Granted Patent: US 7,335,162 B2
• Time in Patent Office: Days
• US Class Current: 600/561
• CPC Class Codes: A61B 5/021 Measuring pressure in heart or blood vessels A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/02108 from analysis of pulse wave characteristics
• CPC Class Codes: A61B 5/03 Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs A61B5/205 takes precedence
• CPC Class Codes: A61B 5/031 Intracranial pressure
• CPC Class Codes: G16H 15/00 ICT specially adapted for medical reports, e.g. generation or transmission thereof

Abstract

A system for performing an analysis of pressure-signals derivable from pressure measurements on or in a body of a human being or animal, includes a communication interface for receiving a set of digital pressure sample values, a memory for storing these values, and a processor capable of performing the analysis, the processor having means to identify features related to single pressure waves in the pressure signals based on input of the digital data into the processor, and the processor further having determination means which based on the features is configured to a) determine a minimum pressure value related to diastolic minimum value and a maximum pressure value related to systolic maximum value, b) determine at least one parameter of the single wave parameters elected from the group of: pressure amplitude=ΔP=[(maximum pressure value)−(minimum pressure value)], latency (AT), rise time or rise time coefficient=ΔP/ΔT, and wavelength of the single wave, c) determine number of the single pressure waves occurring during a given time sequence, including determination of the number of single pressure waves with pre-selected values of one or more of the single pressure wave parameters during the given time sequence, and d) determine number of single pressure waves with pre-selected combinations of two or more of the single pressure wave parameters during the given time sequence. Further, the system has a display for visual presentation of the result of analysis performed by the processor.

Claims

1. A system for performing an analysis of pressure-signals derivable from pressure measurements on or in a body of a human being or animal, said system including:

a communication interface for receiving a set of digital pressure sample values,

a memory for storing these values, and

a processor capable of performing the analysis,

said processor having means to identify features related to single pressure waves in said pressure signals based on input of said digital data into the processor,

said processor further having determination means which based on said features is configured to;

a) determine a minimum pressure value related to diastolic minimum value and a maximum pressure value related to systolic maximum value,

b) determine at least one parameter of the single wave parameters elected from the group of;

pressure amplitude=Δ

P=[(maximum pressure value)−

(minimum pressure value)], latency (Δ

T), rise time or rise time coefficient=Δ

P/Δ

T, and wavelength of the single wave,

c) determine number of said single pressure waves occurring during a given time sequence, including determination of the number of single pressure waves with pre-selected values of one or more of said single pressure wave parameters during said given time sequence, and

d) determine number of single pressure waves with pre-selected combinations of two or more of said single pressure wave parameters during said given time sequence, and

a display for visual presentation of the result of analysis performed by the processor.

2. A system according to claim 1, wherein said display is a video interface controlled by said processor.

3. A system according to claim 1, wherein said communication interface, memory, processor and display together constitute a single apparatus means.

4. A system according to claim 3, wherein a pressure sensor and pressure transducer is connectable to said apparatus.

5. A system according to claim 3, wherein said apparatus is used as an interface for connecting a network station or personal computer to a pressure sensor.

6. A system according to claim 3, wherein said apparatus is digitally operated when sampling and storing pressure measurements obtained from a pressure sensor placed in or on a patient.

7. A system according to claim 3, wherein said apparatus has an input for receiving pressure measurements from a pressure sensor capable of sensing pressures elected from intracranial pressure, blood pressure, and pressure in other body cavities of a human or animal.

8. A system according to claim 3, wherein said apparatus includes an input control.

9. A system according to claim 8, wherein said input control includes at least one of a calibration function, a function for selecting the interval of pressure recordings, and a function for adjusting the real time clock.

10. A system according to claim 3, wherein an internal battery powers said apparatus.

11. A system according to claim 10, wherein said internal battery is rechargeable.

12. A system according to claim 3, wherein said apparatus includes an input for external power supply.

13. A system according to claim 3, wherein said single apparatus means is a programmable computer.