1
Shuichiro Yamaguchi, Naoto Uchida, Takeshi Shimomura, Noboru Oyama: Enzyme sensor. Terumo Kabushiki Kaisha, Burns Doane Swecker & Mathis, May 22, 1990: US04927516 (510 worldwide citation)

Disclosed is an enzyme sensor for measuring a predetermined substrate concentration by potentiometric or amperometric response on the basis of an enzyme. In one aspect, a solid-state enzyme sensor measures a predetermined substrate concentration by potentiometric response and includes a solid enzyme ...


2
Hanson S Gifford III, John B Simpson, Peter S Brown: Atherectomy device for severe occlusions. Devices for Vascular Intervention, Townsend & Townsend, May 22, 1990: US04926858 (452 worldwide citation)

An atherectomy catheter for removal of plaque buildup from the walls of a blood vessel. The atherectomy catheter includes a cutter assembly disposed at the distal end of a flexible guide tube that may be inserted into a vessel and directed to the occlusion. A proximal actuator assembly is adapted to ...


3
E Marlowe Goble, W Karl Somers, David McGuire: Process of endosteal fixation of a ligament. M Reid Russell, May 22, 1990: US04927421 (410 worldwide citation)

A cannulated interference screw (10) and process for human implantation in an arthroscopic surgical procedure for replacement of a ligament, or the like. The interference screw is provided with a drill end (11) that extends longitudinally from an end of a cylindrical body (14), which drill end inclu ...


4
James D Stice, Chester E Sievert Jr, Steven C Christian: ARthroscopic instrumentation and method. Flexmedics Corporation, James R Haller, Gregory P Kaihoi, Mary P Bauman, May 22, 1990: US04926860 (340 worldwide citation)

Arthroscopic instrumentation for use in arthroscopic surgery and similar procedures. The instrumentation includes a cannula having a curved lumen and an elongated, flexible normally straight shape memory alloy probe. The probe is insertable into the lumen of the cannula, which in turn can be directe ...


5
Frank Dorman: Cardiac assist pump with steady rate supply of fluid lubricant. Regents of the University of Minnesota, Haugen and Nikolai, May 22, 1990: US04927407 (282 worldwide citation)

A centrifugal pump for left ventricle assist includes a pump housing forming an impeller chamber with inlet and outlet passages and enclosing an impeller rotatable to move blood through the impeller chamber, and a rotor chamber enclosing a rotor integral with the impeller and rotatable to drive the ...


6
Carlos A Glandt, Harold J Vinegar, Michael Prats: Method of producing tar sand deposits containing conductive layers. Shell Oil Company, May 22, 1990: US04926941 (265 worldwide citation)

A method is disclosed for producing thick tar sand deposits by preheating of thin, relatively conductive layers which are a small fraction of the total thickness of a tar sand deposit. The thin conductive layers serve to confine the heating within the tar sands to a thin zone adjacent to the conduct ...


7
William T McShea III, Robert M Yarrington: Method of methanol production. Engelhard Corporation, May 22, 1990: US04927857 (263 worldwide citation)

A process for methanol production includes preparing a hydrogen containing synthesis gas by autothermally reforming a hydrocarbonaceous feed, such as a hydrocarbon feed, with oxygen and steam in an autothermal reformer utilizing a first, monolithic catalyst having a palladium and platinum containing ...


8
Paul S Oman: Microcomputer-based nerve and muscle stimulator. Merchant Gould Smith Edell Welter & Schmidt, May 22, 1990: US04926865 (238 worldwide citation)

A transcutaneous nerve stimulation device is provided with mircocomputer-based control of pulse duration, pulse repetition rate, stimulation duty cycle and modulation of pulse parameters. The microcomputer 2 monitors battery 15 voltage and patient manipulated controls 14 that select pulse current am ...


9
John Pastrone, Edward Laenen: Drive mechanism for disposable fluid infusion pumping cassette. Abbott Laboratories, Harry G Thilbault, Robert E Wexler, May 22, 1990: US04927411 (229 worldwide citation)

A disposable fluid infusion pumping chamber cassette comprises a sandwich type construction which lends itself to a multiplicity of control and monitoring functions including pressure monitoring, air bubble detection monitoring, adaption to multiple inputs, and leak detection monitoring, the cassett ...


10
Toshikazu Shiga, Takuji Suzaki: Non-invasive measuring method and apparatus of blood constituents. Omron Tateisi Electronics Co, Wegner & Bretschneider, May 22, 1990: US04927264 (222 worldwide citation)

In order to measure the oxygen saturation in venous blood, a venous blood stream is made time-variant by applying pressure with a peak value of the minimum blood pressure to a proximal portion from a measuring part. Light beams with different wavelengths are transmitted from the measuring part and d ...