Abstract: In a small sized pump driving unit, a fluid pump is used for driving the pump for supporting of substituting of cardiac function. The fluid pump can generate pressure fluctuations that can generate pulsation of the pump for supporting or substituting of cardiac function and produces sufficient performance to drive the pump unit.

Abstract: The present invention aims to provide a pneumoperitoneum gas heating and humidifying apparatus and a pneumoperitoneum device employing this apparatus, in which there is no contamination of the carbon dioxide gas with bacteria, a clean humidified gas is obtained, and the temperature of gas for which the relay was halted and then restarted does not rise excessively. This pneumoperitoneum gas heating and humidifying apparatus provided with an airline, a water conduit which is provided to at least a portion of the outer periphery of this airline, and water supply ports which are connected to the water conduit, wherein at least a portion of the wall of the airline facing the water conduit is formed of a water permeable membrane. The present invention further provides a pneumoperitoneum device in which a carbon dioxide gas cylinder, a gas flow regulator, and a trocar catheter are sequentially connected via piping.

Abstract: An artificial ligament 12 comprises a ligament section 12 having a long narrow shape, and coupling sections provided on both ends. The coupling sections comprise balls which are fixed at both ends of the ligament section, and holding body in which a holding space is formed within the inner section by means of cap section covering the holding body base section so as to hold the balls in a slidable manner. Attachment holes are formed in the bones of the joint, and the coupling sections are fixed by being screwed into the attachment holes. After transplantation of this ligament, there is no damage to the artificial ligament when the joint is extended, and long lasting use can be expected.

Abstract: The present invention relates to a bubble elimination method in a medical centrifugal pump wherein a blood outlet 18 is directed upward so that a vertical line X passing through the enter point O of centrifugal pump main body 12 is positioned between two straight lines .alpha.,.beta. which respectively pass through center point O and a point A and center point O and a point B, points A and B lying on the circumference of centrifugal chamber 15 where its periphery connects with blood outlet 18, and a blood inlet 17 is directed upward at an angle which is larger than the angle which is formed between the axis and the inner peripheral surface of centrifuge chamber 15, blood outlet 18 and blood inlet 17 being supported in these states by a drive portion 13 of the centrifugal pump main body 12. After filling the centrifuge chamber with blood and liquid filling, the processes of low speed drive, drive halt and high speed drive are sequentially carried out to rotating body 23.

Abstract: The dialysis apparatus in accordance with the present invention is provided with main piping connecting a blood inlet and a blood outlet, and having disposed therealong a blood pump, a dialyzer, and a venous-side chamber, in that order from the blood inlet side; and with a supplementary fluid supply mechanism, which is connected between the blood inlet and the blood pump through the medium of a branch pipe branching from the main piping; this apparatus is furthermore provided with a first clamp provided between the blood inlet and the blood pump of the main piping, a second clamp provided between the venous-side chamber and the blood outlet, and a third clamp provided on the branch pipe. In addition, by means of this dialysis apparatus, it is possible to reliably and easily return blood within the main piping of the dialysis apparatus to the body of the patient after the completion of blood dialysis.

Abstract: A slide is arranged to be semitransparent to scatter the light emitted from a microscope to optically eliminate the outlines of pores of a filter. Material such as cell, nuclei or extracellular materials is captured on the top surface of the filter by filtration. A specimen preparation can be made by placing the filter with the material thereon on the semitransparent slide. A metal evaporation layer, so-called multicoating, can be positioned on the surface of a cover glass, so that the material can be more clearly recognized, especially at high magnification.

Abstract: An apparatus for counting used medical cloths and measuring the quantity of liquid absorbed therein is disclosed. The apparatus comprises a hollow passage way for passing the medical cloths therethrough, an entrance portion for guiding the medical cloths to the passage, a pass detection sensor arranged in the passage for sensing the medical cloths, a weight sensor disposed at the bottom of the passage for sensing weight of dropped medical cloths, and a control unit for operating the output signals of the pass detection sensor and the weight sensor to output the number of dropped medical cloths and the weight of liquid absorbed therein. The control unit comprises a judging element for judging whether counting condition is normal or not according to the TSR of output signals of the sensors. The apparatus further comprises an alarm element for producing alarm signals when the judging element judges the condition abnormal.

Abstract: A slide is arranged to be semitransparent to scatter the light emitted from a microscope to optically eliminate the outlines of pores of a filter. Material such as cell, nuclei or extracellular materials is captured on the top surface of the filter by filtration. A specimen preparation can be made by placing the filter with the material thereon on the semitransparent slide. A metal evaporation layer, so-called multicoating, can be positioned on the surface of a cover glass, so that the material can be more clearly recognized, especially at high magnification.

Abstract: An artificial lung comprises a venous blood reservoir to receive and store venous blood. A heat exchanger communicating with the venous blood reservoir receives the venous blood so the blood temperature is regulated by heat exchange through a wall between flowing water and the venous blood. A blood oxygenator concentrically disposed within a hollow space of said heat exchanger comprises a cylindrical body defining a cylindrical space and at least one gas permeable membrane separating said cylindrical space into a first space and a second space. The first space receives the venous blood from the heat exchanger and the second space communicates with an oxygenating gas feed line so that the blood is oxygenated through the gas permeable membrane.

Abstract: A blood oxygenator includes an elongated hollow housing having an elongated chamber therein, an elongated fiber assembly disposed within the chamber along an axis thereof and including a bundle of hollow fibers of a microporous membrane. The opposite ends of the fiber bundle are sealingly secured to the inner peripheral surface of the housing by a potting material. Gas inlet and outlet members are connected respectively to the opposite ends of the housing and communicate respectively with the opposite ends of the hollow fibers. Blood inlet and outlet are formed on the housing and communicate with the chamber intermediate the opposite ends of the hollow fibers. The fiber assembly includes a plurality of layers of spirally-wound fiber bundles arranged one upon another. Each turn of one of each adjacent spirally-wound bundles is disposed in a plane intersecting the plane in which each turn of the other fiber bundle is disposed.

Abstract: A high-efficiency and compact high-frequency artificial respirator is disclosed. A patient circuit (1) of the artificial respirator is supplied with a respiration gas from a respiration gas supply source (6), and an oscillation generator (2) imparts high-frequency oscillation to the respiration gas thereby supplied. The patient circuit (1) has at one thereof a chamber defined by a vessel (12d) or a serpentine passage (31). A positive pressure is exerted on the chamber as a result of the gas being injected from nozzles (12e, 32).

Abstract: An oscillator for imparting oscillation at a high frequency to respiratory gas in a pneumatic circuit of a high frequency oscillatory ventilation apparatus for artificial respiration includes a cylinder unit mounted on a base plate and including a cylinder, a piston rod slidably extending through the cylinder along an axis thereof, and a piston fixedly mounted on the piston rod and received in the cylinder for sliding movement therealong for applying oscillation to the pneumatic circuit. A first engaging member, mounted on a reciprocable output shaft of a motor mounted on the base plate, engages a second engaging member mounted on the piston rod to connect the output shaft to the piston rod to reciprocally move the piston, the engagement being made in a manner to allow the second engaging member to move out of engagement with the first engaging member in a direction perpendicular to an axis of the piston rod.

Abstract: There is provided a blood pump apparatus which can supply a pulsating flow of the blood to a body of a patient at a desired rate of flow. R waves are detected from an output of an electrocardiograph to produce a timing signal which is used for controlling timing of intermittent actuation of a motor of a blood pump such as a roller-type pump. A rotation speed of the motor required to obtain the desired flow rate of the blood is automatically calculated in accordance with data inputted by an operator, the data including discharge of the pump per a predetermined revolution of the motor, delay time to be lapsed before an actuation of the motor, duration of the actuation of the motor, and amount of the blood to be fed per a unit period of time. The motor is then controlled to rotate at the calculated speed at the intervals synchronized with the detected R waves.

Abstract: An artificial respirator of a high-frequency oscillation ventilation type is provided which is free from a risk of increasing pressure in the airways. The respirator comprises a double communication tube with inner and outer tubes. One of the tubes is utilized for feeding a respiration or anesthetic gas to the airways through an endotracheal cannula, and the other tube is connected to a communication tube in which two jet air injection tubes are provided. The first jet air injection tube is utilized for injecting a jet respiration gas to thereby transmitting high-frequency oscillations to the respiration or anesthetic gas. The second jet air injection tube is utilized for injecting a jet respiration gas toward outside of the communication tube from therewithin thereby to decrease the pressure in the communication tube and hence in the airways.

Abstract: A hydrophilized membrane of a porous hydrophobic material having micropores each defined by a surface at least part of which is coated with polyethylene glycol. Water is allowed to pass through the micropores. There is also disclosed a process for hydrophilizing such a porous hydrophobic membrane.

Abstract: A ventilation apparatus for artificial respiration comprises a high frequency oscillation ventilator and an intermittent positive pressure ventilator, each of these ventilators being composed of a pneumatic circuit. The high frequency oscillation ventilator is connected to a respiratory gas source for feeding a respiratory gas to a patient circuit at a preselected high frequency. Also, the intermittent positive pressure ventilator is connected to the respiratory gas source for feeding the respiratory gas to the patient circuit at a preselected frequency. A shut-off valve means is provided for selectively communicating the gas source with the two ventilators whereby these ventilators are operated either alone or in combination.

Abstract: A blood suction device for removing blood from a surgical field is provided which can be controlled by a pressure sensing means mounted on a suction tip of the device for starting and stopping the roller pump of the device, and changing the revolution rate of the roller pump, thus enabling to reduce possible hemolysis, clothing and other undesirable effects. The blood suction device comprises pressure sensing means for detecting the pressure exerted thereupon which can be handled adjacent the suction tip by means of pneumatic pressure, and control means for controlling the revolution rate in response to the sensed pressure. The revolution rate when the device is not gripped or pushed by the operator may be set either at zero revolution or at any desired revolution.

Abstract: An intestinal irrigator adapted for use with an artificial anus which includes a body having a hollow portion having open front and rear ends. The hollow portion has a bag-mounting portion. A suction portion is arranged around the hollow portion. The suction portion has an open front end which lies flush with the open front end of the hollow portion. The suction portion has a suction port connectable to a suction source. A liquid supply portion is connected to the hollow portion and is connectable to a liquid supply source for supplying a liquid to the interior of the hollow portion.

Abstract: Novel method of treating capillary fibers comprising introducing into the capillary fibers a carbon chloride fluoride or a mixture of the carbon chloride fluoride with a material capable of forming an azeotrope therewith to remove selectively octyl alcohol, isopropyl myristate and the like from the capillary fibers, retaining glycerol within the wall of said capillary fibers.

Abstract: A liquid transfer pump in which a flexible hose may be arranged along the internal peripheral wall of a semicircular external enclosure and a drive shaft which is rotated by a motor or the like is provided at a position with the equal distance from the internal peripheral wall and a plurality of squeeze rollers which travel around the drive shaft in accordance with rotation of the drive shaft while rolling around their own axis and squeeze out the liquid in the flexible hose while depressing the flexible hose against the internal peripheral wall to transfer the liquid from one position to another position is rotatably supported by a holder fixed to the drive shaft, wherein the internal peripheral wall of the external enclosure is slanted and the external peripheral surfaces of the squeeze rollers opposite to the internal peripheral wall are made parallel with the internal peripheral wall.