Abstract: A top-blowing lance nozzle is configured to freely switch an adequate expansion condition so as to control an oxygen-blowing amount and a jetting velocity independently of each other without requiring a plurality of lance nozzles or a mechanically movable part. A lance nozzle is configured to blow refining oxygen to molten iron charged in a reaction vessel while a gas is blown from a top-blowing lance to the molten iron. One or more blowing holes for blowing a working gas are on an inner wall side surface of the nozzle, at a site where the lance nozzle has a minimum cross-sectional area in a nozzle axis direction or at a neighboring site of the site.

Abstract: A medical pump driving device comprises a centrifugal pump for transferring liquid in a liquid channel including an artificial lungs, a motor for driving the centrifugal pump, and a bubble removing mechanism for removing a bubble from the liquid channel including the medical device by transferring liquid by the pump. The bubble removing mechanism comprises a CPU for setting various types of set values to intermittently drive the motor, a RAM and an EEPROM for storing the set value set by the CPU, an D/A converter 251, and motor driving circuit for intermittently driving the motor based on the set value stored in the RAM, and EEPROM.

Abstract: A medical pump driving device comprises a centrifugal pump for transferring liquid in a liquid channel including an artificial lung, a motor for driving the centrifugal pump, and a bubble removing mechanism for removing a bubble from the liquid channel including the medical device by transferring liquid by the pump. The bubble removing mechanism comprises a CPU for setting various types of set values to intermittently drive the motor, a RAM and an EEPROM for storing the set value set by the CPU, an D/A converter 251, and motor driving circuit for intermittently driving the motor based on the set value stored in the RAM, and EEPROM.

Abstract: A medical pump drive for automatically displaying not only the flow rate of circulating blood but also blood flow rate per surface area of the body of a patient in a medical treatment such as extracorporeal circulation includes at least a pump driving circuit, an ultrasonic transceiver and ultrasonic oscillator for measuring flow rate of the blood conveyed by a pump, a CPU, to which values of height and weight of a patient are entered, for calculating the body surface area of the patient as well as the blood flow rate per body surface area of the patient based upon the blood flow rate and body surface area obtained, an LCD for displaying the calculated blood flow rate per body surface area, and an LED for displaying the blood flow rate obtained.

Abstract: A simple inspection device is constituted for inspection of an analyzer for measuring ionic activity by using an ionic activity measuring device provided with at least one ion selective electrode pair for generating potential corresponding to ionic activity fo a predetermined ion, and a porous bridge for associating the electrodes of the ion selective electrode pair with each other, and by contacting potential difference measuring probes respectively with the electrodes of the ion selective electrode pair, thereby to measure a difference in potential between the electrodes. The simple inspection device comprises a supporting member having outer dimensions approximately equal to ther outer dimensions of the ionic activity measuring device, and an electrically conductive member supported on the supporting member for short-circuiting across the potential difference measuring probes when the potential difference measuring probes are contacted with the electrically conductive member.

Abstract: A simple inspection device is constituted for inspection of an analyzer for measuring ionic activity by using an ionic activity measuring device provided with at least one ion selective electrode pair for generating an electrical potential corresponding to ionic activity of a predetermined ion, and a porous bridge for associating the electrodes of the ion selective electrode pair with each other, and by contacting potential difference measuring probes respectively with the electrodes of the ion selective electrode pair, to thereby measure a difference in potential between the electrodes. The simple inspection device employs a supporting member having outer dimensions approximately equal to the outer dimensions of the ionic activity measuring device, and an electrically conductive member supported on the supporting member for short-circuiting across the potential difference measuring probes when the potential difference measuring probes are contacted with the electrically conductive member.

Abstract: An analyzer for ionic activity measurement comprises a device supporting base provided with a liquid feeding section for feeding a reference solution in drops to one electrode of an ion selective electrode pair of an ionic activity measuring device and feeding a sample solution in drops to the other thereof, a potential difference measuring section, and a device ejecting section for ejecting the measuring device. A device holder is disposed for holding the measuring device on the device supporting base. A holder movement mechanism moves the device holder for transferring the measuring device sequentially to the respective sections of the device supporting base.