Sensor for transcutaneous measurement of vascular access blood flow

(54) SENSOR FOR TRANSCUTANEOUS

MEASUREMENT OF VASCULAR ACCESS
BLOOD FLOW

(75) Inventors: Robert R. Steuer, Pleasant View, UT
(US); David A. Bell, Farmington, UT
(US); David R. Miller, Morgan, UT
(US)

(73) Assignee: Hema Metrics, Inc., Kaysville, UT (US)

( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 79 days.

(21) Appl. No.: 10/730,102

(22) Filed: Dec. 9, 2003

(65) Prior Publication Data

US 2004/0122330 Al Jun. 24, 2004

Related U.S. Application Data

(62) Division of application No. 09/750,076, filed on Dec. 29, 2000, now Pat. No. 6,725,072.

FOREIGN PATENT DOCUMENTS

J.P Payne and J.W. Severinghaus, Eds., Pulse Oximetry, Chapters 1 and 2 (©1986).

John D. Bower and Thomas G. Coleman, Circulatory Function During Chronic Hemodialysis, vol. XV Trans. Amer. Soc. Artif. Int. Organs, 1969, 373-377. Larry Reynolds, C. Johnson, A. Ishimaru, "Diffuse reflectance from a finite blood medium: applications to the modeling of fiber optic catheters," Sep. 1976, vol. 15, No. 9, Applied Optics pp. 2059-2067.

R.N. Greenwood, C, Aldridge, L. Goldstein, L.R.I. Baker and W.R. Cattell, "Assessment of arteriovenous fistulae from pressure and thermal dilution studies: clinical experience in forearm fistulae," Clinical Nephrology, vol. 23, No. 4-1985, pp. 189-197.

(Continued)

Primary Examiner—Eric F. Winakur

Assistant Examiner—Matthew Kremer

(74) Attorney, Agent, or Firm—Jacobson Holman PLLC

Page 2

U.S. PATENT DOCUMENTS

OTHER PUBLICATIONS

R.N. Greenwood, C. Aldridge and W.R. Cattell, "Serial blood water estimations and in-line blood viscometry: the continuous measurement of blood volume during dialysis procedures," Clinical Science (1984)66, pp. 575-583.

C. Aldridge, R.N. Greenwood, W.R. Cattell and R. V. Barrett, "The assessment of arteriovenous fistulae created for haemodialysis from pressure and thermal dilution measurements," Journal of Medical Engineering & Technology, vol. 8, No. 3, (May/Jun.), pp. 118-124.

L. Goldstein, L. Pavitt, R.N. Greenwood, C. Aldridge, L.R.I. Baker and W.R. Cattell, "The Assessment of Arteriovenous Fistulae From Pressure and Recirculation Studies," ProcEDTNA-ERCA (1985) vol. 14., pp. 207-215. R.N. Greenwood, C. Aldridge, L. Goldstein, L.R.I. Baker and W.R. Cattell, "Assessment of Arteriovenous Fistulas From Pressure Recirculation Studies: Clinical Experience In 215 Upper Limb Fistulas," ProcEDTA-ERA (1985), vol. 22, pp. 296-302.

Joseph M. Schmitt, James D. Meindl and Frederick G.
Mihm, "An Integrated Circuit-Based Optical Sensor for In
Vivo Measurement of Blood Oxygenation," IEEE Transac-
tions On Biomedical Engineering, vol. BME-33, No. 21,
Feb. 1986, pp. 98-107.

Joseph M. Schmitt, Fred G. Mihm and James Meindl, New
Methods for Whole Blood Oximetry, Annals of Biomedical
Engineering, vol., 14, pp. 35-52, 1986.
Mark R. Arnfield, J. Tulip and Malcolm McPhee, "Optical
Propagation in Tissue With Anisotropic Scattering," IEEE
Transactions on Biomedical Engineering, vol. 35, No. 5, No.
5, May 1988, pp. 372-381.

N.M. Krivitski, "Theory and validation of access flow measurements by dilution technique during hemodialysis," Kidney Int 48:244-250, 1995.

N.M. Krivitski, "Novel method to measure access flow during hemodialysis by ultrasound velocity dilution technique," ASAIO J 4LM741-M745, 1995. T.A. Depner and N.M. Krivitski, "Clinical measurement of blood flow in hemodialysis access fistulae and grafts by ultrasound dilution," ASAIO J 41 :M745-M749, 1995).

D. Yarar et al., "Ultrafiltration method for measuring vascular access flow rates during hemodialysis," Kidney Int., 56: 1129-1135 (1999).

N.M. Krivitski et al., "Saline Release Method to Measure Access Flow (AF) by Ultrasound Dilution during Hemodialysis," JASN Abstracts, 8:164A, 1997.

* cited by examiner