Liquid purification or separation – Processes – Including controlling process in response to a sensed condition
Reexamination Certificate
2007-11-20
2007-11-20
Kim, John (Department: 1723)
Liquid purification or separation
Processes
Including controlling process in response to a sensed condition
C210S745000, C073S861000, C073S861050, C073S861070
Reexamination Certificate
active
10871319
ABSTRACT:
The measurement of blood flow in a dialysis shunt is obtained by injection of an indicator material into a venous line leading from dialysis equipment to the shunt. The blood flow in an arterial line leading from the shunt at a location downstream of the venous line to the dialysis equipment is monitored by an arterial line sensor for the presence of the indicator material. A detector connected to the sensor provides a dilution curve in response to the presence of the indicator material and the blood flow in the shunt is calculated from the area under the dilution curve. The locations of the arterial and venous lines in the shunt can be reversed to obtain a measurement of blood recirculation from the venous line into the arterial line.
REFERENCES:
patent: 3640271 (1972-02-01), Horton
patent: 3964479 (1976-06-01), Boag et al.
patent: 3990973 (1976-11-01), Boag et al.
patent: 4081372 (1978-03-01), Atkin et al.
patent: 4123353 (1978-10-01), Hakansson et al.
patent: 4136563 (1979-01-01), Mueller et al.
patent: 4153554 (1979-05-01), von der Heide et al.
patent: 4181610 (1980-01-01), Shintani et al.
patent: 4231366 (1980-11-01), Schael
patent: 4353368 (1982-10-01), Slovak et al.
patent: 4391124 (1983-07-01), Drost et al.
patent: 4432231 (1984-02-01), Napp et al.
patent: 4434648 (1984-03-01), Drost et al.
patent: 4508622 (1985-04-01), Polaschegg et al.
patent: 4596550 (1986-06-01), Troutner
patent: 4650458 (1987-03-01), Dahlberg et al.
patent: 4777958 (1988-10-01), Ophir
patent: 4797655 (1989-01-01), Orndal et al.
patent: 4832484 (1989-05-01), Aoyagi et al.
patent: 4856321 (1989-08-01), Smalling et al.
patent: 4897184 (1990-01-01), Shouldice et al.
patent: 4923598 (1990-05-01), Schal
patent: 4938873 (1990-07-01), Rossi
patent: 4966691 (1990-10-01), Brous
patent: 4995268 (1991-02-01), Ash et al.
patent: 5024756 (1991-06-01), Sternby
patent: 5100554 (1992-03-01), Polaschegg
patent: 5230341 (1993-07-01), Polaschegg
patent: 5312550 (1994-05-01), Hester
patent: 5385143 (1995-01-01), Aoyagi
patent: 5510716 (1996-04-01), Buffaloe, IV et al.
patent: 5526808 (1996-06-01), Kaminsky
patent: 5551422 (1996-09-01), Simonsen et al.
patent: 5553615 (1996-09-01), Carim et al.
patent: 5642734 (1997-07-01), Ruben et al.
patent: 5676143 (1997-10-01), Simonsen et al.
patent: 5685989 (1997-11-01), Krivitski et al.
patent: 5690104 (1997-11-01), Kanemoto et al.
patent: 5720284 (1998-02-01), Aoyagi et al.
patent: 5803908 (1998-09-01), Steuer et al.
patent: 255 478 (1988-04-01), None
patent: 0 018 817 (1980-11-01), None
patent: 0 089 003 (1983-03-01), None
patent: 0 373 455 (1990-06-01), None
patent: 521891 (1976-07-01), None
patent: WO 94/27495 (1994-12-01), None
patent: WO 98/17193 (1998-04-01), None
Proc EDTA-ERA (1985) vol. 22, pp. 296-302.
C. Aldridge et al., The assessment of arteriovenous fistulae created for haemodialysis from pressure and thermal dilution measurements, Journal of Medical Engineering & Technology, May/Jun. 1984, pp. 118-124, vol. 8, No. 3.
Charles B. Anderson, M.D. et al., Blood flow measurements in arteriovenous dialysis fistulas, Surgery, Apr. 1977, pp. 459-461, vol. 81, No. 4.
David A. Ogden, M.D. et al., In vivo measurement of blood recirculation during “Y” type single needle dialysis, Journal of Dialysis, 1979, pp. 265-176, vol. 3.
Louk F.I.J. Oudenhoven et al., Magnetic resonance, a new method for measuring blood flow in hemodialysis fistulae, Kidney International, 1994, pp. 884-889, vol. 45.
Emil P. Paganini, MD, FACP, Adapting the dialysis unit to increased hematoorit levels American Journal of Kidney Diseases, Apr. 1995, pp. S12-S17, vol. 25, No. 4, Suppl. 1.
James L. Porile et al., Preservation of Vascular Access, Journal of the American Society of Nephrology, 1993, pp. 997-1003, vol. 4, No. 4.
Stanley E. Rittgers, PH.D. et al., Noninvasive blood flow measurement in expanded polytetrafluoroethylene grafts for hemodialysis access, Journal of Vascular Surgery, Apr. 1986, pp. 635-642, vol. 3, No. 4, The C.V. Mosby Company, St. Louis, Mo.
Barry S. Strauch, MD, Forecasting thrombosis of vascular access with doppler color flow imaging, American Journal of Kidney Diseases, Jun. 1992, pp. 554-557, vol. XIX, No. 6.
M. Thomas et al., Measurement of vascular access recirculation without contralateral venous puncture, Nephron, 1992, pp. 224-225, vol. 62.
Zbylut J. Twardowski, MD, All currently used measurements of recirculation in blood accass by chemical methods are flawed due to Intradialytic disequilibrium or recirculation at low flow, American Journal of Kidney Diseases, Dec. 1998, pp. 1046-1058, vol. 32, No. 6.
Zbylut J. Twardowski, Blood recirculation in Intravenous catheters for hemodialysis , Journal of the American Society of Nephrology, 1993, pp. 1978-1981, vol. 3, No. 12.
Jeffrey Sands et al., Access flow measured during hemodialysis, ASAIO Journal, Jan.-Feb. 1996, pp. 841-844, vol. 42, No. 1, Lippencott-Raven Publishers.
ASAIO Journal, Jan.-Feb. 1996, p. 74, vol. 42, No. 1, Lippincott-Raven Publishers.
Journal of the American Society of Nephrology, Sep. 1995, p. 501-502, vol. 6, No. 3.
Journal of the American Society of Nephrology, Sep. 1996, p. 1419, vol. 7, No. 9, Williams & Wilki.
Daniel Schneditz et al., Measurement of access flow during hemodialysis using the constant infusion approach, ASAIO Journal, 1998, pp. 74-81.
Richard A. Sherman, MD et al., Assessment of a two-needle technique for the measurement of recirculation during hemodialysis, American Journal of Kidney Diseases, Jul. 1991, pp. 80-83, Vo.l. XVIII, No. 1.
Richard A. Sherman, MD et al., Rate-related recirculation: The effect of altering blood flow on dialyzer recirculation, American Journal of Kidney Diseases, Feb. 1991, pp. 170-173, vol. XVII No. 2.
Richard A. Sherman, MD et al., Recirculation reassessed: The Impact of blood flow rate and the low-flow method reevaluated, American Journal of Kidney Diseases, Jun. 1994, pp. 846-848, vol. 23, No. 8.
Richard A. Sherman, MD, The measurement of dialysis access recirculation, American Journal of Kidney Diseases, Oct. 1993, pp. 616-621, vol. 22, No. 4.
Mark C. Shu et al., Flow phenomena in compliant and noncompliant arteriovenous grafts, ASAIO Transactions, Jul.-Sep. 1988, pp. 519-523, vol. 34, No. 3.
Robert R. Steuer et al., Enhanced fluid removal guided by blood volume monitoring during chronic hemodialysis, Artificial Organs, 1998, pp. 627-632, vol. 22, No. 8.
Robert R. Steuer et al., Poster Session—Renal 2: Hematocrit as an Indicator of blood volume and a predictor of intradialytic morbid events, ASAIO Journal, Jul.-Sep. 1994, pp. M691-M696, vol. 40, No. 3.
Robert R. Steuer et al., Reducing symptoms during hemodialysis by continuously monitoring the hematocrit, American Journal of Kidney Diseases, Apr. 1996, pp. 525-532, vol. 27, No. 4.
John C. Van Stone, MD et al., Detection of hemodialysis access outlet stenosis by measuring outlet resistance, American Journal of Kidney Diseases, Apr. 1994, pp. 562-568, vol. 23, No. 4.
David W. Windus, MD, Permanent vascular access: A nephrologist's view, American Journal of Kidney Diseases, May 1993, pp. 457-471, vol. 21, No. 5.
Von G. Wittenberg et al., Interobserver-Variabilitat von dialyseshuntflubmessungen unit der farbkodierten duplexsonographie, Fortschr Rontgenstr, 1993, pp. 375-378.
J.A. Barra et al., Interet de la debimetric ultrasonique dans la surveillance post-operatoire et l'evolution des fistules-arterio-veineuses pour l'hemodialyse chronique, Journal d'Urologie et de Nephrologio, 1997, pp. 515-525.
Anatole Besarab et al., Determinants of measured dialysis venous pressure and its relationship to true intra-access venous pressure, ASAIO Transactions, Jul.-Sep. 1991, pp. M270-M271, vol. 37, No. 3.
Anatole Besarab et al., The relationship of recirculation to access blood flow, American Journal of Kidney Diseases, Feb. 1997, pp. 223-229, vol. 29, No. 2.
Journal of the American Society of Nephrology, Sep. 1995, p. 1484, vol. 6, No. 3.
Peter J. Bosman et al., Access flow measurements In hemodialysis patients: In vivo validation of an ultrasound dilution technique, Journal of the Ameri
Krivitski Nikolai M.
MacGibbon David R.
Harter Secrest & Emery LLP
Kim John
Salai Stephen B.
Shaw Brian B.
Transonic Systems Inc.
LandOfFree
Method and apparatus to measure blood flow in hemodialysis... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus to measure blood flow in hemodialysis..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus to measure blood flow in hemodialysis... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3869730