Techniques for obtaining information associated with an individual's blood pressure including specifically a stat mode technique

• US 4,697,596 A
• Filed: 11/13/1986
• Issued: 10/06/1987
• Est. Priority Date: 06/19/1984
• Status: Expired due to Fees

• Current Assignee: Baxter Travenol Laboratories Incorporated
• Original Assignee: Baxter Travenol Laboratories Incorporated
• Inventors: Link, William T.
• Primary Examiner(s): Recla, Henry J.
• Assistant Examiner(s): Sykes, Angela D.
• Application Number:
  US06/930,238
• Time in Patent Office: 327 Days
• Field of Search: 128/672, 128/677, 128/680-683, 128/687-688
• US Class Current: 600/494
• CPC Class Codes: A61B 5/021 Measuring pressure in heart or blood vessels A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/02116 of pulse wave amplitude A61B5/02225 takes precedence
• CPC Class Codes: A61B 5/022 by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
• CPC Class Codes: A61B 5/7239 using differentiation including higher order derivatives

Abstract

Techniques for determining different parameters associated with an individual'"'"'s blood pressure in a non-invasive manner are disclosed herein. These techniques include (1) generating a blood pressure waveform corresponding to the individual'"'"'s actual waveform, whereby the mean pressure of the individual can be readily calculated, (2) generating a transformation curve unique to the patient from his diastolic and systolic pressures and his cuff pulses, (3) successively monitoring certain parameters of the patient'"'"'s blood pressure including his systolic and diastolic pressures over closely spaced intervals of time without having to subject the patient to cuff pressures much greater than his diastolic pressure, other than initially or not at all utilizing what is referred to as a stat mode, and (4) measuring a patient'"'"'s diastolic and systolic blood pressures at any given instance without ever having to subject the patient to cuff pressures much greater than his diastolic pressure.

Claims

1. A method of providing an arterial curve characteristic of a particular mammal, comprising the steps of:

(a) placing a blood pressure cuff around a particular artery of said mammal;

(b) using means cooperating with said cuff, pressurizing the latter at a number of different pressure levels from zero pressure to a pressure at least equal to the mammal'"'"'s systolic pressure and generating cuff pulses having peak to peak amplitude values corresponding to and dependent on said different pressure levels;

(c) determining the diastolic and systolic pressures of said mammal; and

(d) graphically generating said arterial curve in a way which requires the use of said peak to peak values and said diastolic and systolic pressures.

2. A method according to claim 1 wherein only said peak to peak amplitude values and said diastolic and systolic pressures are used to graphically generate said arterial curve.

3. An apparatus for providing an arterial curve characteristic of a particular mammal, comprising:

(a) a blood pressure cuff for placement around a particular artery of said mammal;

(b) means cooperating with said cuff for pressurizing the latter at a number of different pressure levels from zero pressure to a pressure at least equal to the mammal'"'"'s systolic pressure and for generating cuff pulses having peak to peak amplitude values corresponding to and dependent on said different pressure levels;

(c) means for determining the diastolic and systolic pressures of said mammal; and

(d) means for graphically generating said arterial curve in a way which requires the use of said peak to peak values and said diastolic and systolic pressures.

4. An apparatus according to claim 3 wherein only said peak to peak amplitude values and said diastolic and systolic pressures are used to graphically generate said arterial curve.

5. A method of providing an arterial curve characteristic of a particular mammal, comprising the steps of:

(a) placing a cuff or cuff-like member adjacent a particular artery of said mammal;

(b) using means cooperating with said cuff or cuff-like member, pressurizing the latter at a number of different pressure levels from zero pressure to a pressure at least equal to the mammal'"'"'s systolic pressure and generating cuff pulses having peak to peak amplitude values corresponding to and dependent on said different pressure levels;

(c) determining the diastolic and systolic pressure of said mammal; and

(d) generating said arterial curve in a way which requires the use of said peak to peak values and said diastolic and systolic pressures.

6. A method according to claim 5 wherein only said peak to peak amplitude values and said diastolic and systolic pressures are used to generate said arterial curve.

7. An apparatus for providing an arterial curve characteristic of a particular mammal, comprising:

(a) blood pressure cuff means for placement adjacent a particular artery of said mammal;

(b) means cooperating with said cuff means for pressurizing the latter at a number of different pressure levels from zero pressure to a pressure at least equal to the mammal'"'"'s systolic pressure and for generating cuff pulses having peak to peak amplitude values corresponding to and dependent on said different pressure levels;

(c) means for determining the diastolic and systolic pressures of said mammal; and

(d) means for generating said arterial curve in a way which requires the use of said peak to peak values and said diastolic and systolic pressures.

8. An apparatus according to claim 7 wherein only said peak to peak amplitude values and said diastolic and systolic pressures are used to generate said arterial curve.

9. A method of providing an arterial curve characteristic of a particular mammal where one axis of the curve in a given coordinate system represents the volume of a particular artery segment of the mammal and a second axis normal to said one axis represents the wall pressure of said artery segment, comprising the steps of:

(a) placing a cuff or cuff-like member adjacent said particular artery segment of said mammal;

(b) using means cooperating with said cuff or cuff-like member, pressurizing the latter at a number of different pressure levels from zero pressure to a pressure at least equal to the mammal'"'"'s systolic pressure and generating cuff pulses having peak to peak amplitude values corresponding to and dependent on said different pressure levels;

(c) determining the diastolic and systolic pressure of said mammal; and

(d) generating said arterial curve in a way which requires the use of said peak to peak values and said diastolic and systolic pressures.

10. An apparatus for providing an arterial curve characteristic of a particular mammal where one axis of the curve in a given coordinate system represents the volume of a particular artery segment of the mammal and a second axis normal to said one axis represents the wall pressure of said artery segment, comprising:

(a) a blood pressure cuff means for placement adjacent said segment of said mammal;

(b) means cooperating with said cuff means for pressurizing the latter at a number of different pressure levels form zero pressure to a pressure at least equal to the mammal'"'"'s systolic pressure and for generating cuff pulses having peak to peak amplitude values corresponding to and dependent on said different pressure levels;

(c) means for determining the diastolic and systolic pressures of said mammal; and

(d) means for generating said arterial curve in a way which requires the use of said peak to peak values and said diastolic and systolic pressures.