Patents by Inventor Waleed M. El Sayyid
Waleed M. El Sayyid has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10426882Abstract: A hemodialysis system is provided and includes a dialyzer, a dialysis fluid circuit in fluid communication with the dialyzer, a blood circuit, a blood detector and a blood rinseback scheme, wherein the blood rinseback scheme includes transferring blood to the patient using a physiologically acceptable fluid, wherein the physiologically acceptable fluid is introduced from its source into an arterial line between an arterial line patient end and a blood pump of the blood circuit, and flowed through the dialyzer, through a venous drip chamber and to the blood detector along a venous line of the blood circuit, where the physiologically acceptable fluid is sensed by the blood detector to indicate an end of the blood rinseback.Type: GrantFiled: February 4, 2019Date of Patent: October 1, 2019Assignees: Baxter International Inc., Baxter Healthcare SAInventors: Thomas D. Kelly, Waleed M. El Sayyid
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Publication number: 20190167884Abstract: A hemodialysis system is provided and includes a dialyzer, a dialysis fluid circuit in fluid communication with the dialyzer, a blood circuit, a blood detector and a blood rinseback scheme, wherein the blood rinseback scheme includes transferring blood to the patient using a physiologically acceptable fluid, wherein the physiologically acceptable fluid is introduced from its source into an arterial line between an arterial line patient end and a blood pump of the blood circuit, and flowed through the dialyzer, through a venous drip chamber and to the blood detector along a venous line of the blood circuit, where the physiologically acceptable fluid is sensed by the blood detector to indicate an end of the blood rinseback.Type: ApplicationFiled: February 4, 2019Publication date: June 6, 2019Inventors: Thomas D. Kelly, Waleed M. El Sayyid
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Patent number: 10195332Abstract: A renal therapy blood cleansing system is provided. The renal therapy blood cleansing system includes a blood circuit including a blood filtering device, a therapy fluid circuit including a balance chamber configured to exchange like volumes of fresh and used therapy fluid, a first pump configured to pump fresh therapy fluid to the balance chamber, a second pump configured to pump used therapy fluid to the balance chamber, and at least one valve located downstream from the balance chamber, the at least one valve enabling fresh therapy fluid from the balance chamber to be directed selectively to (i) a flow path leading to an inlet of the blood filtering device, or (ii) a flow path leading to the blood circuit at a location upstream or downstream of the blood filtering device.Type: GrantFiled: December 14, 2015Date of Patent: February 5, 2019Assignees: Baxter International Inc., Baxter Healthcare SAInventors: Thomas D. Kelly, Waleed M. El Sayyid
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Patent number: 9480784Abstract: A dialysis system includes an extracorporeal circuit, a dialysis fluid circuit including first and second balance chambers, a fresh dialysis fluid pump in fluid communication with first and second fresh compartments of the first and second balance chambers, respectively. The first and second fresh compartments are in fluid communication with a fresh dialysate fluid inlet of the dialyzer, and a used dialysis fluid pump is in fluid communication with first and second spent compartments of the first and second balance chambers, respectively. The system is configured to run a blood rinseback sequence in which (i) at least one of the fresh used dialysis fluid pumps is operated to pump dialysis fluid through the dialyzer and into the extracorporeal circuit and (ii) the blood pump is operated to push blood back to a patient connected to the extracorporeal circuit.Type: GrantFiled: September 3, 2015Date of Patent: November 1, 2016Assignees: Baxter International Inc., Baxter Healthcare S.A.Inventors: Thomas Kelly, Robert W. Childers, Don Busby, Rodolfo Roger, Waleed M El Sayyid, Shahid Din
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Publication number: 20160095970Abstract: A renal therapy blood cleansing system is provided. The renal therapy blood cleansing system includes a blood circuit including a blood filtering device, a therapy fluid circuit including a balance chamber configured to exchange like volumes of fresh and used therapy fluid, a first pump configured to pump fresh therapy fluid to the balance chamber, a second pump configured to pump used therapy fluid to the balance chamber, and at least one valve located downstream from the balance chamber, the at least one valve enabling fresh therapy fluid from the balance chamber to be directed selectively to (i) a flow path leading to an inlet of the blood filtering device, or (ii) a flow path leading to the blood circuit at a location upstream or downstream of the blood filtering device.Type: ApplicationFiled: December 14, 2015Publication date: April 7, 2016Inventors: Thomas D. Kelly, Waleed M. El Sayyid
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Publication number: 20160030657Abstract: A dialysis system includes an extracorporeal circuit, a dialysis fluid circuit including first and second balance chambers, a fresh dialysis fluid pump in fluid communication with first and second fresh compartments of the first and second balance chambers, respectively. The first and second fresh compartments are in fluid communication with a fresh dialysate fluid inlet of the dialyzer, and a used dialysis fluid pump is in fluid communication with first and second spent compartments of the first and second balance chambers, respectively. The system is configured to run a blood rinseback sequence in which (i) at least one of the fresh used dialysis fluid pumps is operated to pump dialysis fluid through the dialyzer and into the extracorporeal circuit and (ii) the blood pump is operated to push blood back to a patient connected to the extracorporeal circuit.Type: ApplicationFiled: September 3, 2015Publication date: February 4, 2016Inventors: Thomas Kelly, Robert W. Childers, Don Busby, Rodolfo Roger, Waleed M. El Sayyid, Shahid Din
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Patent number: 9211370Abstract: A renal therapy blood cleansing system is provided. The renal therapy blood cleansing system includes a blood filtering device in fluid communication with a blood circuit, a balance chamber configured to exchange like volumes of fresh and used therapy fluid with the blood filtering device, a first pump configured to pump fresh fluid to the balance chamber, a second pump positioned and arranged to receive used fluid from the blood filtering device, and a control scheme. The control scheme is programmed to isolate the blood filtering device from the second pump and deliver a volume of fresh fluid to the blood filtering device via the balance chamber while the second pump is isolated from the blood filtering device, so as to increase fluid volume within the blood circuit.Type: GrantFiled: March 15, 2013Date of Patent: December 15, 2015Assignees: Baxter International Inc., Baxter Healthcare S.A.Inventors: Thomas D. Kelly, Waleed M. El Sayyid
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Patent number: 8430835Abstract: A renal therapy blood cleaning system includes: a blood filtering device in communication with an extracorporeal circuit; a first pump configured to pump fluid to the blood filtering device; a second pump configured to pump fluid from the blood filtering device; a balance chamber in fluid communication with first and second lines, the first and second lines in fluid communication with the first and second pumps, respectively, the balance chamber configured to exchange like volumes of fresh and spent fluid; a plurality of valves; and a control scheme programmed to operate the plurality of valves to enable spent fluid taken from the balancing chamber through one of the first and second lines to be recirculated to the balance chamber through the other of the first and second lines to compensate for a volume of fresh fluid delivered to the blood filtering device.Type: GrantFiled: June 4, 2010Date of Patent: April 30, 2013Assignees: Baxter International Inc., Baxter Healthcare S.A.Inventors: Thomas D. Kelly, Waleed M. El Sayyid
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Publication number: 20100241045Abstract: A renal therapy blood cleaning system includes: a blood filtering device in communication with an extracorporeal circuit; a first pump configured to pump fluid to the blood filtering device; a second pump configured to pump fluid from the blood filtering device; a balance chamber in fluid communication with first and second lines, the first and second lines in fluid communication with the first and second pumps, respectively, the balance chamber configured to exchange like volumes of fresh and spent fluid; a plurality of valves; and a control scheme programmed to operate the plurality of valves to enable spent fluid taken from the balancing chamber through one of the first and second lines to be recirculated to the balance chamber through the other of the first and second lines to compensate for a volume of fresh fluid delivered to the blood filtering device.Type: ApplicationFiled: June 4, 2010Publication date: September 23, 2010Applicants: BAXTER INTERNATIONAL INC., BAXTER HEALTHCARE S.A.Inventors: Thomas D. Kelly, Waleed M. El Sayyid
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Patent number: 7744553Abstract: Systems and methods for improving medical fluid delivery systems, such as hemofiltration (“HF”) and hemodiafiltration (“HDF”) are provided. In first embodiments, systems and methods for selectively performing pre- and postdilution HF and HDF clearance modes is provided. In other embodiments, systems and methods for providing prime bolus and rinseback fluid volumes before, during and/or after HF and HDF therapies are provided. In further embodiments, improved systems and methods for removing ultrafiltrate from the patient are provided. Still further, improved filtration configurations and methods are provided.Type: GrantFiled: December 16, 2003Date of Patent: June 29, 2010Assignees: Baxter International Inc., Baxter Healthcare S.A.Inventors: Thomas D. Kelly, Waleed M. El Sayyid