Method for analysing pressure signals derivable from a body cavity

• US 7,775,985 B2
• Filed: 11/17/2006
• Issued: 08/17/2010
• Est. Priority Date: 04/30/2001
• Status: Expired due to Fees

• Current Assignee: Dpcom As
• Original Assignee: Dpcom As
• Inventors: Eide, Per Kristian
• Primary Examiner(s): Mallari; Patricia C
• Application Number:
  US11/600,716
• Publication Number:
  US 20070060835A1
• Time in Patent Office: 1,369 Days
• Field of Search: 600/485, 600/486, 600/561
• US Class Current: 600/485
• 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 method for analysing pressure-signals derivable from pressure measurements on or in a body of a human being or animal, includes the steps of sampling said signals and converting the signals to pressure-related digital data with a time reference, wherein the method comprises the further steps of: identifying from said digital data features related to absolute pressures relative to atmospheric pressure, recording repeatedly at specific time intervals, intermittently, in any reiterated manner, or continuously absolute pressure data to create a pressure trend plot against time, determining from said recording either a) a plurality of different pressure levels and duration thereof, or b) a plurality of different pressure changes of different levels and duration thereof, and presenting a) numbers of different pressure levels of various time durations in format of a matrix, or b) presenting numbers of different pressure change levels of various time durations in format of a matrix.

Claims

1. A method for analysing pressure-signals derivable from pressure measurements on or in a body of a human being or animal, comprising the steps of sampling said signals and converting the signals to pressure-related digital data with a time reference,

wherein the method further comprises the steps of:

identifying, with a digital processor, from said pressure-related digital data, absolute pressure data representing absolute pressures relative to atmospheric pressure,

recording repeatedly at specific time intervals, intermittently, in any reiterated manner, or continuously the absolute pressure data to create a pressure trend plot against time,

determining, from the pressure trend plot against time, a plurality of different pressure levels and corresponding time duration of each of the different pressure levels, and

presenting numbers of different pressure levels of various time durations in format of a matrix,

wherein said numbers in said matrix relate to a number of occurrence of matches between a specific absolute pressure level and a specific time duration of the specific absolute pressure level.

2. The method according to claim 1, wherein the occurrence of matches is indicated through actual number or standardisation based number of matches during a specific measurement period.

3. The method according to claim 1, wherein the occurrence of matches is indicated through percentage of matches during a specific measurement period.

4. The method according to claim 2, wherein said standardisation of said numbers or percentages of the occurrence of matches is a function of the length of the specific measurement period.

5. The method according to claim 4, wherein said standardisation is expressed through use of ratio numbers or percentages.

6. The method according to claim 1, wherein reiterated plotting or updating of the occurrence of matches in the format of the matrix is made during measurements taken over a specific measurement period.

7. A method for analysing pressure-signals derivable from pressure measurements on or in a body of a human being or animal, comprising the steps of sampling said signals and converting the signals to pressure-related digital data with a time reference,

wherein the method further comprises the steps of:

identifying, with a digital processor, from said pressure-related digital data, absolute pressure data representing absolute pressures relative to atmospheric pressure,

recording repeatedly at specific time intervals, intermittently, in any reiterated manner, or continuously the absolute pressure data to create a pressure trend plot against time,

determining, from the pressure trend plot against time, a plurality of different pressure levels and a corresponding time duration of each of the different pressure levels, and

presenting numbers of different pressure levels of various time durations in format of a matrix,

wherein said matrix is compared with another matrix based on measurements of single pressure waves and one or more parameters related thereto, extending over a specific measurement period.

8. The method according to claim 7, wherein said single pressure waves are derived from arterial blood pressure waves and/or intra-cavity pressure waves.

9. The method according to claim 8, wherein said intra-cavity pressure is one or more of intra-cranial pressure, blood pressure, cerebrospinal fluid pressure and cerebral perfusion pressure.