Abstract: A semiconductor memory device includes a semiconductor substrate and a plurality of element regions formed in the semiconductor, wherein at least one column gate and at least one equalizer are formed as a set in one element region of the plurality of element regions. In one embodiment, a set of a column gate and an equalizer share a diffusion layer with an adjacent set of a column gate and an equalizer. In a second embodiment, a gate electrode of the equalizer is disposed to divide a diffusion layer into six regions. In other embodiments, the equalizer is surrounded by at least a gate electrode of a column gate. In yet other embodiments, the sets of column gates and equalizers are disposed parallel to a bit line.

Abstract: A flow-velocity sensor probe includes a thermistor for generating heat which is placed in a fluid, and a waterproof resin and a metal piece for easily radiating the heat generated by the thermistor. The flow velocity of the fluid is measured continuously from a change of temperature in the thermistor, and the thermistor is provided in close proximity to the metal piece for transmitting the heat to the fluid.

Abstract: A multi-luminal catheter is characterized in that the cross-sectional shape of each lumen at a connection portion for an extension tube is molded in accordance with the outer shape of the extension tube to be connected. Accordingly, smooth and hermetic connection between a catheter body and the extension tube, that has not been accomplished in the past, can be obtained, and the formation of steps of the lumen which increases fluid resistance can be prevented. This mult-luminal catheter can be produced by pressing a core metal having substantially the same shape as that of the outer shape of the extension tube into each lumen of the catheter body at the connection portion for the extension tube and inserting the connection portion for the extension tube into a molding die while heating it.

Abstract: A catheter for measuring a cardiac output includes a catheter tube defining a longitudinal bore therein and having an opening near its distal end, wherein the tube bore is divided into a first lumen for installing therein a thermistor on a proximal side with respect to the opening, a second lumen in communication with the opening, and at least one third lumen. There are provided a first partition separating the first lumen and the third lumen and a second partition separating the second lumen and the third lumen, the first partition being separate from the second partition.

Abstract: A biological information measurement apparatus for measuring biological information by contacting a probe with a living body or inserting the probe into the living body includes a biological information detecting circuit for electrically detecting biological information, and a biological information processing circuit for digitally processing the biological information detected. Exchange of signals between the biological information detecting circuit and biological information processing circuit is performed in an electrically isolated state. Preferably, the apparatus is equipped with a first power supply circuit for supplying power solely to the biological information detecting circuit, and a second power supply circuit for supplying power to the first power supply circuit, wherein supply of power from the second power supply circuit to the first power supply circuit is performed in an electrically isolated state.

Abstract: A catheter accommodating an electrical wire in the longitudinal direction thereof, wherein an enlargement is provided in at least part of its cavity, and an excess length of wire respect to the catheter in the unstretched state is accommodated slack in the enlargement.

Abstract: Disclosed is an apparatus for measuring a cardiac output on the basis of a dilution method.

Abstract: A balloon catheter is provided, which comprises a catheter body made of a flexible tube provided with at least one inner channel and with an annular groove formed on an outer surface near the distal end portion of the tube, and a balloon covering the annular groove in such a manner that the outer diameter of the balloon is equal to or smaller than a maximum diameter of the distal end portion of the tube, the balloon being expanded or shrunk through another inner channel. A method of manufacturing the balloon catheter which comprises the steps of reducnig an outer diameter of a distal end portion of the catheter body while keeping a desired inner channel undamaged, mounting a tubular heat-resistant member to a prospective balloon mounting portion of the reduced diameter portion, molding a reduced diameter portion extruded from the heat-resistant member into a spherical shape, and mounting an inflatable balloon to the balloon mounting portion after removing the heat-resistant member.

Abstract: A multi-luminal catheter of this invention is characterized in that the cross-sectional shape of each lumen at a connection portion for an extension tube is molded in accordance with the outer shape of the extension tube to be connected. Accordingly, smooth and hermetic connection between a catheter body and the extension tube, that has not been accomplished in the past, can be obtained, and the formation of steps of the lumen which increases fluid resistance can be prevented. This multi-luminal catheter can be produced by pressing a core metal having substantially the same shape as that of the outer shape of the extension tube into each lumen of the catheter body at the connection portion for the extension tube and inserting the connection portion for the extension tube into a molding die while heating it.

Abstract: A catheter introduced into the pulmonary artery for use in measuring cardiac output or blood flow velocity includes temperature sensing device including a temperature sensing element for sensing the temperature of blood in the pulmonary artery diluted by an indicator liquid infused for measurement of cardiac output based on a thermodilution method, and a self-heating thermistor for sensing a signal relating to blood flow velocity near the temperature sensing element, the signal being an equilibrium temperature sensed by the thermistor. The catheter is connected to a cardiac output measurement system adapted to measure cardiac output on the basis of the thermodilution method, measure the blood flow velocity which prevails when the cardiac output is measured, and obtain a parameter which links this blood flow velocity to the cardiac output measured in accordance with the thermodilution method.