Abstract: A method and apparatus for identifying reticulocytes within a blood sample is provided.

Abstract: A method and apparatus for identifying reticulocytes within a blood sample is provided.

Abstract: A method and apparatus for identifying reticulocytes within a blood sample is provided.

Abstract: A method for the determination of the red blood cell indices including the volume, and hemoglobin content and concentration for individual red blood cells, as well as red blood cell population statistics, including total number of red blood cells present in the sample, and mean values for each of the aforementioned indices within a substantially undiluted blood sample is provided.

Abstract: A method for the determination of the red blood cell indices including the volume, and hemoglobin content and concentration for individual red blood cells, as well as red blood cell population statistics, including total number of red blood cells present in the sample, and mean values for each of the aforementioned indices within a substantially undiluted blood sample is provided.

Abstract: A method for the determination of the red blood cell indices including the volume, and hemoglobin content and concentration for individual red blood cells, as well as red blood cell population statistics, including total number of red blood cells present in the sample, and mean values for each of the aforementioned indices within a substantially undiluted blood sample is provided.

Abstract: A method for the determination of the red blood cell indices including the volume, and hemoglobin content and concentration for individual red blood cells, as well as red blood cell population statistics, including total number of red blood cells present in the sample, and mean values for each of the aforementioned indices within a substantially undiluted blood sample is provided.

Abstract: In a switching mode power supply a snubbing circuit, provided to dissipate the energy of voltage overshoots, is so controlled as to be effective only during the switch-off periods, thereby to dissipate substantially only the voltage overshoot energy.

Abstract: A blood pressure system which cycles through an inflation cycle and a deflation cycle during which systolic and diastolic blood pressure in a patient is automatically measured. The blood pressure system basically comprises an inflatable pressure cuff system for accomplishing occlusion and the subsequent opening of an artery in a patient being monitored, and an electrical system for increasing and decreasing the pressure in the cuff under servo loop control and for displaying the systolic and diastolic measurements. A pressure transducer produces an electrical signal indicative of the actual pressure in the cuff. A solenoid valve permits selective pressure decrease during the deflation cycle. A rotary vane compression pump provides pressure increase during the inflation cycle. During the inflation cycle, pressure increase in the cuff is accomplished by a servo control loop comprising the transducer, the pump, and an inflate/deflate controller.

Abstract: A blood pressure system which cycles through an inflation cycle and a deflation cycle during which systolic and diastolic pressure in a patient is automatically measured. The blood pressure system basically comprises a pressure cuff system for accomplishing occlusion and the subsequent opening of an artery in a patient being monitored, and an electrical system for controlling the pressure cuff system and for displaying the systolic and diastolic measurements. In order to automatically carry out the inflation and deflation cycle of the blood pressure system, a dedicated controller is employed. A microphone, contained within the blood pressure cuff produces an electrical signal indicative of pulsatile activity within the artery. A K-sound detector receives the signal and relays information to the dedicated controller. In the blood pressure system, K-sound detection continually takes place during both the inflation and deflation cycles of the instrument.

Abstract: An electrical system for measuring a parameter of a liquid sample such as the hematocrit and an approximation of hemoglobin for a blood sample. The system basically comprises an instrument and a disposable sample card. The instrument is a hand-held, battery-operated device used for the fast and simple measurement of a parameter such as blood conductivity. The instrument accepts the disposable sample card, which is used for the one-time conveyance and application of a liquid sample, such as blood, to the instrument. The instrument has provision for digital displays for read-outs. There are no external switches on the instrument, and power is automatically applied when the disposable sample card is inserted into the instrument.

Abstract: A disposable sample for use in measuring a parameter of a liquid sample such as the hematocrit and a method of making same. The disposable sample card is a micro-volume conductivity cell precision molded from plastic with built-in stainless steel electrodes. The sample card comprises a planar base portion on which is defined a capillary tube. First and second electrodes are disposed within the capillary tube in a spaced relationship and define a volume within the capillary tube. This volume constitutes a conductivity cell. The sample card may be used with an instrument which basically comprises an electronic portion for processing data obtained from the liquid sample on the sample card, a front-end mechanism for positioning the sample card within the instrument, and a digital display for displaying in eye-readable form the results of a parameter measurement made in the instrument.

Abstract: A system for measuring a parameter of a liquid sample, such as the hematocrit and an approximation of hemoglobin for a blood sample. The system basically comprises a hand-held instrument and a disposable sample card. The instrument accepts the disposable sample card, which is used for the one-time conveyance and application of a liquid sample, such as blood, to the instrument. The instrument has provision for digital displays for readouts. The disposable sample card is a micro-volume conductivity cell precision molded from plastic with built-in stainless steel electrodes. The instrument basically comprises an electronic portion for processing data obtained from the liquid sample on the sample card, a front-end mechanism for positioning the sample card within the instrument, and a digital display for displaying in eye-readable form the results of a parameter measurement made in the instrument.

Abstract: The hand-held instrument is preferably supported by a strap from the neck for one or two handed playing of a keyboard with switch and potentiometer controls of a remote synthesizer which may be basically of conventional design and include a plurality of output voice means. A lightweight keyboard assembly is mounted within an elongated premolded housing having a control panel comprised of control switches and light indicators. The instrument is preferably for playing by the right hand, and for the purpose of holding and controlling the stability of the instrument, the housing is formed with a left hand gripping hole or slot permitting the instrument to be firmly gripped. Adjacent the hole there are provided additional control knobs and push button switches which are easily operated by the left hand without any repositioning of the hand. An umbilical cord interconnects the hand supported keyboard musical instrument and the synthesizer apparatus.

Abstract: The system of this invention is for use with an electronic musical instrument having a keyboard, and generally includes keyboard circuitry, audio waveform generators, envelope generators, static and dynamic filter circuitry and power amplifier and speaker apparatus. In accordance with one feature of this invention, the system comprises means for establishing different digital voice codes which are coupled to read only memories associated with the audio waveform generators, envelope generators and main voice circuitry. This voice code provides a limited number of program conditions to control such variables as audio waveform pulse widths, envelope attack, decay, sustain or release intervals, and instrument resonator control. Another feature of the present invention is concerned with the keyboard circuitry which operates from a digital key and octave code. Each code is sequentially interrrogated to determine if the corresponding key has been played.