Patents by Inventor Sheng-Ping Zhong
Sheng-Ping Zhong 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: 6830575Abstract: A catheter comprises a catheter shaft, at least a portion of which defines a medical device receiving region, and at least one sleeve. The at least one sleeve comprises a tubular member constructed and arranged to transition between an extended state and a retracted state. The tubular member has a first portion being engaged to a portion of the catheter shaft adjacent to the medical device receiving region. In the extended state a second portion is constructed and arranged to at least partially overlay the medical device receiving region. In the retraced state the second portion is removed from about the medical device receiving region. At least one of the first portion and the second portion of the tubular member are at least partially constructed from a shape memory material.Type: GrantFiled: May 8, 2002Date of Patent: December 14, 2004Assignee: SciMed Life Systems, Inc.Inventors: Eric B. Stenzel, Ronald A. Sahatjian, Sheng-ping Zhong, Kinh-Luan D. Dao, Peter L. Dayton, Daniel J. Kalashian, Stephen Griffin, Thomas Yung-hui Chien
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Publication number: 20040193208Abstract: An embolic protection filter assembly and method of making the same. In at least some embodiments, the present invention relates to embolic protection filters having at least one radiopaque component.Type: ApplicationFiled: March 27, 2003Publication date: September 30, 2004Applicant: SCIMED LIFE SYSTEMS, INC.Inventors: Dnyanesh Talpade, Peter Hirshman, Yem Chin, Sheng-Ping Zhong, Kinh-Luan D. Dao, James G. Hansen, Brian J. Lowe
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Publication number: 20040186377Abstract: A medical device includes a body, a member in the body, and a contrast agent in the member. The device can be visible by magnetic resonance imaging.Type: ApplicationFiled: March 17, 2003Publication date: September 23, 2004Inventors: Sheng-Ping Zhong, Ronald A. Sahatjian
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Publication number: 20040171747Abstract: A medical device is described which has on a surface thereof a bio-compatible coating. This bio-compatible coating is formed from a composition which includes an aqueous emulsion or dispersion of a polycarbonate-polyurethane composition containing one or more internal emulsifying agents.Type: ApplicationFiled: March 4, 2004Publication date: September 2, 2004Inventor: Sheng-Ping Zhong
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Publication number: 20040158275Abstract: An embolic protection filter and method of making the same. An embolic protection filter may include a filter membrane or material having a plurality of holes. In some embodiments, the filter membrane may be manufactured by spray coating a filter material onto a forming member or spray mold.Type: ApplicationFiled: February 11, 2003Publication date: August 12, 2004Applicant: SCIMED LIFE SYSTEMS, INC.Inventors: Justin Crank, Narin Anderson, James G. Hansen, Horng-Ban Lin, Mark Smith, The Thomas Trinh Tran, Kinh-Luan D. Dao, Yem Chin, Sheng-Ping Zhong, James M. Anderson, Jeffrey H. Vogel
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Publication number: 20040158270Abstract: An atherectomy burr has an operating diameter that is larger than the diameter of a catheter in which the burr is routed. The burr may include a polymeric balloon that is coated with an abrasive and that expands when the burr is rotated. When the burr is rotated, the polymeric tube expands by centrifugal force. The maximum expansion of the burr is controlled by an expansion mechanism. Various mechanisms are disclosed for controlling the maximum diameter of the burr thus preventing the burr from over expanding. In addition, the present invention includes a system for preventing the loose ablated particulate from reembolizing in the distal vasculature. The system includes an ablation burr that has abrasive disposed on the proximal end that is pulled back toward the guide catheter to ablate the lesion. The burr creates a seal when expanded to block the ablated particulate so that the aspiration system can remove the particulate from the patient vessel or stent.Type: ApplicationFiled: February 2, 2004Publication date: August 12, 2004Applicant: SCIMED Life Systems, Inc.Inventors: Mark H. Wyzgala, Eric B. Hamilton, Thomas J. Hiblar, Lixiao Wang, John J. Chen, Irina Nazarova, Nancy L. Haig, Sheng-Ping Zhong
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Publication number: 20040143180Abstract: A medical device comprising a substrate and a hydrogel coating disposed over at least a portion of the substrate surface. The hydrogel coating contains an MRI contrast agent and includes inner and outer regions. The inner region comprises a first hydrogel polymer, and the outer region comprises a second hydrogel polymer that can be the same as or different from the first hydrogel polymer. The inner region exhibits more absorption upon hydration than does the outer region. Examples of hydrogel polymers include polysaccharide and polypeptide hydrogel polymers such as alginic acid, hyaluronic acid, chitin, carboxymethyl cellulose, hydroxypropyl cellulose, collagen, and gelatin, as well as salts and copolymers thereof. Upon insertion or implantation of the medical device into a patient, the hydrogel coating is differentiable from the environment surrounding the hydrogel coating under magnetic resonance imaging.Type: ApplicationFiled: January 9, 2004Publication date: July 22, 2004Inventors: Sheng-Ping Zhong, Enxin Ma, Kinh-Luan Dao
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Publication number: 20040131755Abstract: System and method for coating a medical appliance is provided. In accord with one embodiment, a system for applying a coating to a medical appliance having accessible patterned surfaces is provided. The system may include: a processor, an appliance support, and a solenoid type fluid dispensing head having an electromagnetically controlled valve. In the system, the appliance support may be adapted to hold the medical appliance and to provide direct access for a coating to contact the exposed external patterned surfaces of the medical appliance. The solenoid type fluid dispensing head in this system may move with respect to the medical appliance and may be in communication with a source of coating and with the processor. The processor in this system may contain commands that instruct the solenoid type fluid dispensing head to force coating onto the accessible patterned surfaces of the medical appliance in a pattern that correlates with the accessible patterned surfaces of the medical appliance.Type: ApplicationFiled: December 15, 2003Publication date: July 8, 2004Inventors: Sheng-Ping Zhong, Dennis R. Boulais, Praveen Kulkarni, Ron Sahatijian
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Publication number: 20040126405Abstract: A three dimensional cell scaffold is provided including a biocompatible polymer formed from a plurality of fibers configured so as to form a non-woven three dimensional open celled matrix having a predetermined shape, a predetermined pore volume fraction, a predetermined pore shape, and a predetermined pore size, with the matrix having a plurality of connections between the fibers.Type: ApplicationFiled: December 30, 2002Publication date: July 1, 2004Applicant: SCIMED Life Systems, Inc.Inventors: Ronald A. Sahatjian, Michael S. Banik, Sheng-Ping Zhong, Toby Freyman, Liem Vu, Kinh-Luan D. Dao, Yem Chin
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Publication number: 20040124146Abstract: A non-woven polymeric matrix for separating leukocytes from a blood sample includes a non-woven three dimensional matrix formed from polymeric fibers having a predetermined pore volume fraction including a defined channel configuration, a predetermined pore size in the range of from about 10 &mgr;m to about 250 &mgr;m, and a plurality of connections between the plurality of fibers. The matrix is configured so as to remove at least about 98% of leukocytes from at least one unit of packed red blood cells. Methods of making and using the matrix are also provided.Type: ApplicationFiled: December 30, 2002Publication date: July 1, 2004Applicant: Scimed Life Systems, Inc.Inventors: Kinh-Luan D. Dao, Yem Chin, Sheng-Ping Zhong, Kshitij Mohan, Liem Vu
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Publication number: 20040122350Abstract: A hemostatic insert is provided for closing a puncture site in a blood vessel wall. The insert includes an expandable hemostatic member comprising a biocompatible water soluble gel configured to expand from a compressed state when exposed to body fluid and seal the puncture site in the blood vessel wall. A control layer surrounds the hemostatic member and delays expansion of the hemostatic member.Type: ApplicationFiled: June 12, 2003Publication date: June 24, 2004Inventors: Sheng-Ping Zhong, Michael N. Helmus, Mark T. Ungs, Daniel M. Lafontaine
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Patent number: 6723121Abstract: A coating for a medical device is described which enhances the bio-activity of the surface of a medical device, rendering the surface substantially bio-compatible. The bio-compatible coating is formed from a composition which includes an aqueous emulsion or dispersion of a polycarbonate-polyurethane composition and an excess of polyfunctional cross-linking agent.Type: GrantFiled: September 27, 2000Date of Patent: April 20, 2004Assignee: SciMed Life Systems, Inc.Inventor: Sheng-Ping Zhong
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Patent number: 6685718Abstract: An atherectomy burr has an operating diameter that is larger than the diameter of a catheter in which the burr is routed. The burr may include a polymeric balloon that is coated with an abrasive and that expands when the burr is rotated. When the burr is rotated, the polymeric tube expands by centrifugal force. The maximum expansion of the burr is controlled by an expansion mechanism. Various mechanisms are disclosed for controlling the maximum diameter of the burr thus preventing the burr from over expanding. In addition, the present invention includes a system for preventing the loose ablated particulate from reembolizing in the distal vasculature. The system includes an ablation burr that has abrasive disposed on the proximal end that is pulled back toward the guide catheter to ablate the lesion. The burr creates a seal when expanded to block the ablated particulate so that the aspiration system can remove the particulate from the patient vessel or stent.Type: GrantFiled: July 31, 2000Date of Patent: February 3, 2004Assignee: SciMed Life Systems, Inc.Inventors: Mark H. Wyzgala, Eric B. Hamilton, Thomas J. Hiblar, Lixiao Wang, John J. Chen, Irina Nazarova, Nancy L. Haig, Sheng-Ping Zhong
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Patent number: 6682771Abstract: System and method for coating a medical appliance are provided. In accord with one embodiment, a system for applying a coating to a medical appliance having accessible patterned surfaces is provided. The system may include: a processor, an appliance support, and a solenoid type fluid dispensing head having an electromagnetically controlled valve. In the system, the appliance support may be adapted to hold the medical appliance and to provide direct access for a coating to contact the exposed external patterned surfaces of the medical appliance. The solenoid type fluid dispensing head in this system may move with respect to the medical appliance and may be in communication with a source of coating and with the processor. The processor in this system may contain commands that instruct the solenoid type fluid dispensing head to force coating onto the accessible patterned surfaces of the medical appliance in a pattern that correlates with the accessible patterned surfaces of the medical appliance.Type: GrantFiled: January 14, 2002Date of Patent: January 27, 2004Assignee: SciMed Life Systems, Inc.Inventors: Sheng-ping Zhong, Dennis R. Boulais, Praveen Kulkarni, Ron Sahatijian
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Patent number: 6676987Abstract: System and method for coating a medical appliance is provided. In accord with one embodiment, a system for applying a coating to a medical appliance having accessible patterned surfaces is provided. This system may include: a processor, a support, and a bubble jet printing head having individual printing nozzles. In this system the support may be adapted to hold the medical appliance and to provide direct access for a coating to contact the exposed external patterned surfaces of the medical appliance. The bubble jet printing head in this system may move with respect to the medical appliance and may be in communication with a source of coating and with the processor. The processor in this system may contain commands that instruct the bubble jet printing head to force coating onto the accessible patterned surfaces of the medical appliance in a pattern that correlates with the accessible patterned surfaces of the medical appliance.Type: GrantFiled: July 2, 2001Date of Patent: January 13, 2004Assignee: SciMed Life Systems, Inc.Inventors: Sheng-ping Zhong, Dennis R. Boulais, Kshitij Mohan, Michael Austin, Jan Weber
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Publication number: 20030212410Abstract: A catheter comprises a catheter shaft, at least a portion of which defines a medical device receiving region, and at least one sleeve. The at least one sleeve comprises a tubular member constructed and arranged to transition between an extended state and a retracted state. The tubular member has a first portion being engaged to a portion of the catheter shaft adjacent to the medical device receiving region. In the extended state a second portion is constructed and arranged to at least partially overlay the medical device receiving region. In the retraced state the second portion is removed from about the medical device receiving region. At least one of the first portion and the second portion of the tubular member are at least partially constructed from a shape memory material.Type: ApplicationFiled: May 8, 2002Publication date: November 13, 2003Inventors: Eric B. Stenzel, Ronald A. Sahatjian, Sheng-Ping Zhong, Kinh-Luan D. Dao, Peter L. Dayton, Daniel J. Kalashian, Stephen Griffin, Thomas Yung-Hui Chien
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Patent number: 6635078Abstract: A medical device delivery apparatus is provided which comprises a catheter having an expandable and contractible member and an expandable medical device disposed about the expandable and contractible member. At least portions of at least one of the medical device and the expandable and contractible member have a pressure sensitive adhesive applied thereto to adhere the medical device to the expandable and contractible member. The pressure sensitive adhesive is selected so as to release the medical device from the expandable and contractible member upon contraction of the member from an expanded state. Suitable medical devices include stents.Type: GrantFiled: September 22, 2000Date of Patent: October 21, 2003Assignee: SciMed Life Systems, Inc.Inventors: Sheng-Ping Zhong, Steven A. Schultz, Kristian J. Dimatteo
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Publication number: 20030100830Abstract: Disclosed is an implantable or insertable medical device comprising (a) a substrate and (b) a hydrogel polymer coating at a least a portion of the surface of the substrate, wherein the hydrogel polymer is adapted to render the medical device visible under magnetic resonance imaging (MRI) upon insertion or implantation of the medical device into a patient. Also disclosed is the use of such a hydrogel coated implantable or insertable medical device in a medical procedure, wherein during or after insertion or implantation of the medical device in a patient, the position of the medical device is viewed under MRI. The use of a hydrogel polymer for coating a medical device wherein the hydrogel polymer is adapted to render a medical device coated with the hydrogel polymer visible under MRI and a hydrogel polymer adapted to render a medical device coated therewith visible under MRI are also disclosed.Type: ApplicationFiled: November 27, 2001Publication date: May 29, 2003Inventors: Sheng-Ping Zhong, Ronald A. Sahatjian, Enxin Ma
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Publication number: 20030100829Abstract: The present invention relates to an elongated medical device for intralumenal manipulation during a process of magnetic resonance imaging. The device includes an elongated body. An extrusion material is integrated with the elongated body and includes a hydrophilic polymer that incorporates a substance having a plurality of paramagnetic ions. The extrusion material is configured to enhance magnetic resonance visibility during said process of magnetic resonance imaging.Type: ApplicationFiled: November 27, 2001Publication date: May 29, 2003Inventors: Sheng-Ping Zhong, Ronald A. Sahatjian
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Patent number: 6565530Abstract: Stabilizing an object in the body of a patient involves the injection of a lower critical solution temperature (LCST) material in a flowable form into the body of the patient so that the material contacts the object. The LCST material then forms a gel in the body due to a temperature inside the body such that the object is contained at least partially within the gel and thereby stabilized by the gel such that the object can then be easily fragmented within the body and/or retrieved from the body.Type: GrantFiled: February 28, 2001Date of Patent: May 20, 2003Assignee: SciMed Life Systems, Inc.Inventors: Ronald Sahatjian, Sheng Ping Zhong, James Wagner