Blood pressure monitoring technique which utilizes a patient's supraorbital artery

• US 5,230,342 A
• Filed: 08/30/1991
• Issued: 07/27/1993
• Est. Priority Date: 08/30/1991
• Status: Expired due to Fees

• Current Assignee: Edwards Lifesciences Corporation, University of Utah Research Foundation (State of Utah)
• Original Assignee: Baxter International Inc.
• Inventors: Westenskow, Dwayne R., Bobo, Donald E. Jr., Baker, Phillip D.
• Primary Examiner(s): Green, Randall L.
• Assistant Examiner(s): WILLSE, DAVID H
• Application Number:
  US07/752,399
• Time in Patent Office: 697 Days
• Field of Search: 128/672, 128/686, 128/714, 128/677, 128/678, 128/679, 128/681, 128/691
• US Class Current: 600/490
• CPC Class Codes: A61B 5/021 Measuring pressure in heart or blood vessels A61B5/0205 takes precedence

Abstract

There is disclosed herein a method of obtaining certain information about the blood pressure of a given patient by means of a particular blood pressure technique, specifically by means of oscillometry, in which the pressurizable pressure transducing bladder located adjacent and cooperating with a particular artery of the patient, is used in combination with means for pressurizing the bladder in a controlled way in order to provide the desired information. The particular artery used is the patient'"'"'s supraorbital artery which is readily accessible in a specific area just above the eyebrow of substantially all patients. There is also disclosed herein a blood pressure transducing bladder assembly which is specifically designed to easily access the supraorbital artery of substantially all patients using the eyebrow and nose of each patient as a frame of reference.

Claims

1. In a method of obtaining certain information about the blood pressure of a given person by means of oscillometry in which a pressurizable pressure transducing bladder located adjacent and cooperating with a particular target artery of the person is used in combination with means for pressurizing the bladder in a controlled way for producing a series of pressure pulses that are responsive to the actual blood pressure within the cooperating target artery and that, upon analysis thereof, provide the desired information, the improvement comprising the steps of:

(a) selecting as said particular artery, a supraorbital artery of the person;

(b) providing a relatively small adhesive attached pressure transducing bladder which when placed externally against the supraorbital artery in a particular manner and pressurized in said controlled way produces said series of pressure pulses; and

(c) placing said bladder externally against said supraorbital artery in said particular manner and pressurizing it in said controlled way for producing said pressure pulses, said pressure transducing bladder being placed externally against said supraorbital artery in a predetermined position with respect to certain predetermined facial features of said given person in order to insure that the bladder is properly placed externally against the supraorbital artery, said pressure transducing bladder forming part of an overall blood pressure transducing bladder assembly which also includes means in a fixed positional relationship with said bladder for securing said transducing bladder in said predetermined position and means adhesively engaging the skin of said person immediately adjacent said predetermined facial features for aligning said securing means with said predetermined facial features for insuring that said bladder is placed in said predetermined position, said securing means including an adhesive backed pad which is large relative to said bladder said predetermined facial features of said given person including the person'"'"'s eyebrow and nose, and wherein said aligning means includes a segment of said adhesive backed pad.

2. The improvement according to claim 1 wherein said adhesive pad is rectangular in outer configuration so as to define widthwise and lengthwise edges, wherein said step of placing said bladder externally against said supraorbital artery includes the step of securing said adhesive pad against the face of said given person such that one lengthwise edge of the pad extends horizontally immediately adjacent the uppermost edge of one of the person'"'"'s eyebrows and such that one widthwise edge of the pad extends vertically in line with and above the centerline of the person'"'"'s nose, whereby to place said transducing bladder in said predetermined position.

3. The improvement according to claim 2 wherein said transducing bladder is generally rectangular in outer configuration so as to define widthwise and lengthwise edges and smaller in both rectangular dimensions than said adhesive pad, said transducing bladder being fixedly secured to one side of said pad within the outer periphery of the pad such that the widthwise edges of said bladder are parallel with and predetermined distances from said one widthwise edge of said pad and such that the lengthwise edges of said bladder are parallel with and predetermined distances from said one lengthwise edge of said pad.

4. The improvement according to claim 3 wherein said widthwise edges of said bladder are about 0.4 inch and 1.2 inches from said one widthwise edge of said pad, respectively, and wherein said lengthwise edges of said bladder are about 0.4 and 0.8 inches from said one lengthwise edge of said pad, respectively.

5. The method according to claim 1 wherein said bladder assembly includes a relatively rigid bladder backing against which said bladder is mounted, said bladder backing being convex in shape so as to function as a spring urging the bladder against the person.

6. The improvement according to claim 1 including one and only one tube extending out of said overall blood pressure transducing bladder assembly for connection with said pressurizing means for pressurizing the bladder and for producing said series of pressure pulses.

7. In a system for obtaining certain information about the blood pressure of a given person by means of oscillometry in which a pressurizable adhesive attached pressure transducing bladder located adjacent and cooperating with a particular target artery of a person is used in combination with means for pressurizing the bladder in a controlled way for producing a series of pressure pulses that are responsive to the actual blood pressure within the cooperating target artery and that, upon analysis thereof, provide the desired information, the improvement comprising a blood pressure transducing bladder assembly including:

(a) said transducing bladder, which is relatively small; and

(b) a pad having an adhesive backing against which said bladder is fixedly mounted within the outermost configuration of the pad, which is large relative to said bladder, said adhesive backing serving to secure said bladder to the face of said given persons;

(c) said bladder and said pad being configured such that by lining up predetermined segments of said pad with the uppermost edge of one of the given person'"'"'s eyebrows and the centerline of the person'"'"'s nose immediately above the latter, said bladder will automatically extend across the supraorbital artery of the person, said adhesive pad being rectangular in configuration so as to define widthwise and lengthwise edges, said bladder being also rectangular in configuration so as to define widthwise and lengthwise edges parallel to the widthwise and lengthwise edges of the pad, one of the lengthwise edges of said pad and one of its widthwise edges serving as said predetermined segments of said pad, the widthwise edges of said bladder being predetermined distances from said one widthwise edge of said pad and the lengthwise edges of said bladder being predetermined distances from said one lengthwise edge of said pad.

8. A blood pressure transducing bladder assembly for use in an oscillometric system for obtaining certain information about the blood pressure of a given person, comprising:

(a) a relatively small, pressurizable adhesive attached pressure transducing bladder having a generally rectangular outer configuration so as to define widthwise and lengthwise edges;

(b) a pad, which is large relative to said bladder, having a generally rectangular outer configuration so as to define widthwise and lengthwise edges and also having an adhesive backing against which the bladder is fixed mounted within the outermost configuration of the pad such that the widthwise and lengthwise edges of the pad and bladder are respectively parallel to one another, said adhesive backing serving to secure said bladder to the face of said given person; and

(c) said bladder and said pad being configured such that by lining up a bottom lengthwise edge and an inner widthwise edge of said pad with the uppermost edge of an eyebrow of the person and the centerline of the person'"'"'s nose, respectively, said bladder will automatically extend across the supraorbital artery of the person, the widthwise edges of said bladder being predetermined distances from said inner widthwise edge of said pad, and the lengthwise edges of said bladder being predetermined distances from said bottom lengthwise edge of said pad.

9. A bladder assembly according to claim 8 wherein the widthwise edges of said bladder are 0.4 inch and 1.2 inches, respectively, from said inner widthwise edge of said pad, and wherein the lengthwise edges of said bladder are 0.4 and 0.8 inches, respectively, from said bottom lengthwise edge of said pad.

10. The improvement according to claim 8 wherein said blood pressure transducing bladder assembly includes a bladder backing disposed between said bladder and said pad to which the bladder is fixedly mounted, said bladder pad being more rigid than said bladder and convex in shape so as to function as a spring to urge the bladder against said given person.

11. The improvement according to claim 8 wherein said blood pressure transducing bladder assembly includes one and only one tube extending out of said bladder for connection with said pressurizing means for producing said series of pressure pulses.

12. The improvement according to claim 8 wherein said bladder, when fully pressurized but unconstrained, is between about 0.1 and 0.6 inches deep and defines a fully pressurized but unconstrained volume between about 0.5 and 8 milliliters.

13. In a method of obtaining certain information about the blood pressure of a given person by means of oscillometry in which a pressurizable pressure transducing bladder located adjacent and cooperating with a particular target artery of the person is used in combination with means for pressurizing the bladder in a controlled way for producing a series of pressure pulses that are responsive to the actual blood pressure within the cooperating target artery and that, upon analysis thereof, provide the desired information, the improvement comprising the steps of:

(a) selecting as said particular artery, a supraorbital artery of the person;

(b) providing a relatively small adhesive attached pressure transducing bladder which when placed externally against the supraorbital artery in a particular manner and pressurized in said controlled way produces said series of pressure pulses; and

(c) placing said bladder externally against said supraorbital artery in said particular manner and pressurizing it in said controlled way for producing said pressure pulses, said pressure transducing bladder being placed externally against said supraorbital artery in a predetermined position with respect to certain predetermined facial features of said given person in order to insure that the bladder is properly placed externally against the supraorbital artery, said pressure transducing bladder forming part of an overall blood pressure transducing bladder assembly which also includes means in a fixed positional relationship with said bladder for securing said transducing bladder in said predetermined position and adhesively engaging the skin of the person immediately adjacent said predetermined facial features means for aligning said securing means with said predetermined facial features for insuring that said bladder is placed in said predetermined position, said securing means including an adhesive backed pad, which is large relative to said bladder wherein said predetermined facial features of said given person including the upper edge of a person'"'"'s eyebrow, and wherein said aligning means includes a segment of said adhesive backed pad which is located adjacent said uppermost eyebrow edge.

14. In a system for obtaining certain information about the blood pressure of a given person by means of oscillometry in which a pressurizable adhesive attached pressure transducing bladder located adjacent and cooperating with a particular target artery of a person is used in combination with means for pressurizing the bladder in a controlled way for producing a series of pressure pulses that are responsive to the actual blood pressure within the cooperating target artery and that, upon analysis thereof, provide the desired information, the improvement comprising a blood pressure transducing bladder assembly including:

(a) said transducing bladder, which is relatively small; and

(b) a pad, which is large relative to said bladder, having an adhesive backing against which said bladder is fixedly mounted within the outermost configuration of the pad, said adhesive backing serving to secure said bladder to the face of said given person;

(c) said bladder and said pad being configured such that by lining up a predetermined segment of said pad with the uppermost edge of one of the given person'"'"'s eyebrows, said bladder will automatically extend across the supraorbital artery of the person.