Patents Assigned to Althin Medical, Inc.
  • Patent number: 5954957
    Abstract: A cap are disclosed that can be attached to at least two of the following hydraulic fittings found on a medical device: a blood port according to DIN 13 090, part 3, comprising a male DIN nipple and surrounding female threaded collar; a male DIN nipple according to DIN 13 090, part 3; a tapered male barb nipple; and a dialysate port according to DIN 58 352, part 2. When fully attached to one of such ports, the cap serves to maintain an internal condition, such a sterility, of the medical device until time of use. A preferred embodiment of the cap comprises a female receptacle adapted to receive one of the foregoing male nipples, a male projection adapted to be inserted into the dialysate port, a manually grippable portion facilitating manual attachment and detachment of the cap, and a channel or analogous feature defined by the female receptacle for venting of the medical device through the male nipple whenever the cap is fully attached to the male nipple.
    Type: Grant
    Filed: September 8, 1997
    Date of Patent: September 21, 1999
    Assignee: Althin Medical, Inc.
    Inventors: Michael Leon Chin-Loy, Benjamin Fernandez
  • Patent number: 5903211
    Abstract: A medical treatment device is disclosed that utilizes an entertainment displays such as a standard television set, to control the medical treatment device. For example, alarm conditions may be displayed and a user (such as a patient) can respond to such alarm conditions. During an uneventful treatment, the patient can view programs (e.g., television programs) on the entertainment display. The medical treatment device can override the entertainment program and cause the entertainment display to display information related to operation or status of the medical treatment device. The medical treatment device can also include a user input (e.g., keyboard, mouse, joystick, etc.) allowing the patient to move a selector image being displayed by the entertainment display to enable the patient to control the medical treatment device.
    Type: Grant
    Filed: February 7, 1997
    Date of Patent: May 11, 1999
    Assignee: Althin Medical, Inc.
    Inventors: Steven E. Flego, Mark E. Connell
  • Patent number: 5897817
    Abstract: Methods are disclosed for making semipermeable membranes from cellulose acetate and for making medical devices therefrom. In the process, a molten liquid comprising cellulose acetate (CA) is extruded to produce a membrane. The solvent and non-solvent are removed from the membrane to produce a semipermeable membrane having a water permeability. The semipermeable membrane is impregnated with a liquid consisting essentially of water to render the semipermeable membrane capable of being stored until time of use without undergoing a substantial loss in water permeability. The semipermeable membrane can be incorporated in a casing in order to produce a medical product, wherein the membrane is impregnated in the product.
    Type: Grant
    Filed: July 8, 1997
    Date of Patent: April 27, 1999
    Assignee: Althin Medical, Inc.
    Inventors: John M. Radovich, Melvin Rothberg, George Washington
  • Patent number: 5744027
    Abstract: A number of improvements relating to methods and apparatuses for kidney dialysis are disclosed.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 28, 1998
    Assignee: Althin Medical, Inc.
    Inventors: Mark E. Connell, Robert A. Bedient, Raymond Elsen, Michael E. Hogard, Harley D. Johnson, Thomas D. Kelly, Jean McEvoy Long, Bruce A. Peterson, William G. Preston, Jr., Dalibor J. Smejtek
  • Patent number: 5736046
    Abstract: Semipermeable membranes are disclosed for purifying aqueous biological fluids. The membranes are particularly suitable for purifying extracorporeal blood via hemodialysis. The membranes, preferably configured as hollow fibers, are made from a hydrophilic polymeric material, preferably cellulose acetate. Features of the membranes include an ultrafiltration coefficient (K.sub.uF) of about 15 to about 55 mL/hr/mmHg/m.sup.2 (thus termed "high-flux" type membranes), a urea mass transfer coefficient (K.sub.oV (Urea)) of at least 38.times.10.sup.-3 cm/min, and a ratio of K.sub.oV (urea)/K.sub.uF of at least 2.5.times.10.sup.-3. Hollow fibers of such membranes suitable for hemodialysis have a lumen diameter of about 175 to about 210 .mu.m and a wall thickness of about 10 to about 35 .mu.m.
    Type: Grant
    Filed: November 20, 1996
    Date of Patent: April 7, 1998
    Assignee: Althin Medical, Inc.
    Inventors: Anders Althin, Ben Fernandez, Raymond Elsen, Kees Ruzius, Lalith Silva, George Washington
  • Patent number: 5730712
    Abstract: Dialyzers and methods are disclosed for performing shortened extracorporeal blood treatments. A flow restriction is provided in a dialyzer serving to partially impede flow of dialysate through the dialysate compartment of the dialyzer. As a result, the pressure of the dialysate upstream of the flow restriction is sufficient to cause the pressure profile of the dialysate from the dialysate inlet to the dialysate outlet of the dialyzer to be non-linear, in contrast to prior-art dialyzers. This perturbation of the dialysate pressure profile permits a single dialyzer to be used to remove large amounts of blood water from a patient's blood and re-infuse large amounts of liquid to the blood while still attaining a desired net ultrafiltration of the patient without the need for more than one dialyzer per treatment or for a separate replacement fluid.
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: March 24, 1998
    Assignee: Althin Medical, Inc.
    Inventors: Thore Falkvall, William W. Anderson, Thomas D. Kelly
  • Patent number: 5645778
    Abstract: Methods are disclosed for making semipermeable membranes from cellulose acetate and for making medical devices therefrom. In the process, a molten liquid comprising cellulose acetate (CA), a solvent for CA, and a non-solvent for CA is extruded to produce a membrane. The solvent and non-solvent are removed from the membrane to produce a semipermeable membrane having a water permeability. The semipermeable membrane is impregnated with a liquid consisting essentially of water to render the semipermeable membrane capable of being stored until time of use without undergoing a substantial loss in water permeability. The semipermeable membrane can be incorporated in a casing in order to produce a medical product, wherein the membrane is impregnated in the product.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: July 8, 1997
    Assignee: Althin Medical, Inc.
    Inventors: John M. Radovich, Melvin Rothberg, George Washington
  • Patent number: 5643452
    Abstract: Semipermeable membranes are disclosed for purifying aqueous biological fluids. The membranes are particularly suitable for purifying extracorporeal blood via hemodialysis. The membranes, preferably configured as hollow fibers, are made from a hydrophilic polymeric material, preferably cellulose acetate. Features of the membranes include an ultrafiltration coefficient (K.sub.uF) of about 15 to about 55 mL/hr/mmHg/m.sup.2 (thus termed "high-flux" type membranes), a urea mass transfer coefficient (K.sub.oV (urea)) of at least 38.times.10.sup.-3 cm/min, and a ratio of K.sub.oV (urea)/K.sub.uF of at least 2.5.times.10.sup.-3. Hollow fibers of such membranes suitable for hemodialysis have a lumen diameter of about 175 to about 210 .mu.m and a wall thickness of about 10 to about 35 .mu.m.
    Type: Grant
    Filed: October 21, 1994
    Date of Patent: July 1, 1997
    Assignee: Althin Medical, Inc.
    Inventors: Anders Althin, Ben Fernandez, Raymond Elsen, Kees Ruzius, Lalith Silva, George Washington
  • Patent number: 5487827
    Abstract: A number of improvements relating to methods and apparatuses for kidney dialysis are disclosed.
    Type: Grant
    Filed: May 13, 1994
    Date of Patent: January 30, 1996
    Assignee: Althin Medical, Inc.
    Inventors: Bruce A. Peterson, Michael E. Hogard
  • Patent number: 5486286
    Abstract: A number of improvements relating to methods and apparatuses for kidney dialysis are disclosed.
    Type: Grant
    Filed: September 14, 1993
    Date of Patent: January 23, 1996
    Assignee: Althin Medical, Inc.
    Inventors: Bruce A. Peterson, Mark E. Connell, Robert A. Bedient, Raymond Elsen, Michael E. Hogard, Harley D. Johnson, Thomas D. Kelly, Jean M. Long, William G. Preston, Jr., Dalibor J. Smejtek
  • Patent number: 5326476
    Abstract: Methods are disclosed for providing certain operational instructions to a hemodialysis machine. The hemodialysis machine possesses a programmable memory and a capability of operating according to a time-varying parameter such as variable ultrafiltration. According to the methods, the machine operator enters into the memory a desired time period, a target cumulative value of the time-varying parameter, such as target UF volume, and a proposed time-varying profile of the time-varying parameter that is representable as a plot of coordinates in a region defined by an ordinate of values of the parameter and a time-based abscissa, wherein the plot defines a profile cumulative value of the parameter. If the profile cumulative value is not equal to the target cumulative value, then the proposed time-varying profile is changed along the ordinate so that the profile cumulative value is made equal to the target cumulative value.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: July 5, 1994
    Assignee: Althin Medical, Inc.
    Inventors: Jeffrey B. Grogan, Thore Falkvall, Harley D. Johnson, Thomas D. Kelly, Alan G. Wolfe
  • Patent number: 5247434
    Abstract: A number of improvements relating to methods and apparatuses for kidney dialysis are disclosed.
    Type: Grant
    Filed: April 19, 1991
    Date of Patent: September 21, 1993
    Assignee: Althin Medical, Inc.
    Inventors: Bruce A. Peterson, Michael E. Hogard, Harley D. Johnson, Thomas D. Kelly, Jean M. Long, William G. Preston, Jr.