Abstract: An extravasation detecting apparatus is provided which is capable of detecting at an early stage the dislodgment of a tip opening of a solution supplying tool from a blood vessel.

Abstract: Provided are a blood pressure measuring apparatus capable of effectively eliminating the influence which the volume change in an upstream portion of an occluding cuff has on a pulse wave detection cuff in an oscillometric double-cuff system, increasing the S/N ratio of systolic blood pressure detection, and accurately measuring the blood pressure with an inexpensive arrangement, a cuff, and a blood pressure measuring method. The apparatus includes a first pipe (106) connected to an occluding air bag (108) and sub air bag (109). The first pipe is connected to the sub air bag, and the sub air bag is connected to the occluding air bag via an entirely foldable rod shape member (111) capable of maintaining a hollow portion. The sub air bag is laid over the occluding air bag by folding a middle pipe.

Abstract: A limb compression device to which a cuff unit wound around a limb of a patient is connected controls compression and release of the limb by controlling air supply and exhaust of the cuff unit to repeat an compression period and a reperfusion period a predetermined number of times. At the start of the compression period, pressurization using the cuff unit is performed up to a compression pressure value based on a systolic blood pressure of the patient measured by detection of pulsation. During the compression period, the device repeats depressurization of the cuff unit at a low rate until pulsation is detected and pressurization of the cuff unit after the depressurization so as to eliminate pulsation.

Abstract: An extravasation detecting apparatus is provided which is capable of detecting at an early stage the dislodgment of a tip opening of a solution supplying tool from a blood vessel.

Abstract: Provided are a blood pressure measuring apparatus capable of effectively eliminating the influence which the volume change in an upstream portion of an occluding cuff has on a pulse wave detection cuff in an oscillometric double-cuff system, increasing the S/N ratio of systolic blood pressure detection, and accurately measuring the blood pressure with an inexpensive arrangement, a cuff, and a blood pressure measuring method. The apparatus includes a first pipe (106) connected to an occluding air bag (108) and sub air bag (109). The first pipe is connected to the sub air bag, and the sub air bag is connected to the occluding air bag via an entirely foldable rod shape member (111) capable of maintaining a hollow portion. The sub air bag is laid over the occluding air bag by folding a middle pipe.

Abstract: A small and power-saving automatic sphygmomanometer constructed of minimum of parts. This automatic sphygmomanometer which inflates a pressure cuff to a value higher than that of one's maximum blood pressure and measures the blood pressure in the process of deflation is comprised of a cuff, air pump connected to the cuff, constant-rate pressure reducing valve for automatically adjusting a cuff pressure reducing velocity to be constant regardless of cuff pressure, exhaust valve for exhausting the air from the cuff, and controller for controlling open/close of the exhaust valve.

Abstract: An electronic Sphygmomanometer employing both the Korotkoff method and the oscillometric method which is thereby capable of accurately measuring blood pressure due to the advantages of the two methods. The electronic sphygmomanometer is arranged in such a manner that either of the results of measurements of the two methods can be automatically selected. A gate for detecting the Korotkoff sound by using an oscillation in cuff pressure is automatically stopped, and the validity of the Korotkoff sound is determined in accordance with a change in the height of the oscillating pulse wave.

Abstract: An electronic sphygmomanometer employing both the Korotkoff method and the oscillometric method which is thereby capable of accurately measuring blood pressure due to the advantages of the two methods. The electronic sphygmomanometer is arranged in such a manner that either of the results of measurements of the two methods can be automatically selected. A gate for detecting the Korotkoff sound by using an oscillation in cuff pressure is automatically stopped, and that the validity of the Korotkoff sound is determined in accordance with a change in the height of the oscillating pulse wave.

Abstract: An electronic sphygmomanometer employing both the Korotkoff method and the oscillometric method which is thereby capable of accurately measuring blood pressure due to the two advantages of the above-described two methods. The electronic sphygmomanometer is arranged in such a manner that either of the results of measurements of the two methods can be automatically selected. A gate for detecting the Korotkoff sound by using an oscillation in cuff pressure is automatically stopped, and that the validity of the Korotkoff sound is determined in accordance with a change in the height of the oscillating pulse wave.

Abstract: An automatic sphygmomanometer of this invention is arranged to predict, on the basis of the relationship between cuff pressure and the amplitude of a pulse wave, maximal and minimal blood pressures while the cuff pressure is being increased. This automatic sphygmomanometer is capable of minimizing the discomfort inflicted upon a subject by increasing or reducing the cuff pressure to the neighborhood of a predicted maximal or minimal blood pressure at a relative high rate. Concretely, the pressure in the cuff is increased at a relatively high pressure-increasing rate to a level immediately below the predicted maximal blood pressure and, thereafter, the pressure-increasing rate is reduced to a rate suitable for measurement. The maximal blood pressure is in turn measured.

Abstract: A photoelectric sphygmomanometer of volume oscillometric method-type is provided with regulating means for regulating quantity of light, carrier-wave gain and pulsation gain based upon the level of the carrier wave immediately after the start of cuff depressurization. This makes it possible to perform regulation after the start of depressurization and to eliminate an inability to take a measurement due to a fluctuation in the level of light received.

Abstract: An electronic sphygmomanometer measures blood pressure while deflating or inflating a cuff. Cuff pressurization is constant, irrespective of cuff size, up to about 10 mmHg. When this value is exceeded, supply of air to the cuff is controlled in accordance with the cuff size. The decision regarding the cuff size is made by reading in the size from a designating switch. The cuff pressure sampling period during inflation is made shorter than that during deflation.

Abstract: A gas flow valve enables constant venting and is used with a cuff showing a rapid decrease in venting ability at a predetermined value on a boundary within the pressure range which allows measurment of blood pressure. The gas flow valve has a body made of an elastic material and comprising a wedge-shaped portion formed integrally with a mounting base so as to have a flat portion with upper and lower surfaces serving as pressure-responsive surfaces, a linear opening formed at the tip of the wedge-shaped portion, and a passageway communicating with the opening and extending in the longitudinal direction within the mounting base and the tip portion. A thin sheet-like member is twisted and disposed in the passageway so that the tip portion is held by the opening. As a result, the elastic deformation of the gas passageway formed by the gaps in the opening during pressure reduction is promoted by the resiliency of the torsion of the thin sheet-like member.

Abstract: An automatic sphygmomanometer for measuring the blood pressure of a subject based on Korotkoff sounds is adapted to analyze the transition of the pulse signal amplitude of a detected cuff pressure signal, set a range in which systolic blood pressure of the subject is capable of residing and a range in which diastolic blood pressure of the subject is capable of residing, and evaluate, based on appearance and disappearance of the Korotkoff sounds, whether the blood pressures that have determined reside in the set ranges. Preferably, the sphygmomanometer is provided with two amplifying/filtering circuits and two discriminating circuits using threshold values suited to each of the frequency characteristics of Korotkoff sound signals in the vicinity of the systolic and diastolic blood pressures. This improves the precision with which each blood pressure is determined.

Abstract: An automatic sphygomomanometer for recognizing blood pressure through detection of Korotkoff sound or cuff pulsating pressure, comprising an air noise removing filter including an air reservoir and a flow resistor connected in series between a pressurizing pump and a cuff. After rectifying the noise generated by the pressing pump, the air is provided, and the blood pressure measurement is made. Preferably, the automatic sphygmomanometer has a flow resistor which has a resistor element made of fibers or paper. A bypass passage bypassing the air noise removing filter, is so controlled that, when the cuff pressure is below a predetermined level, the air supplied from the pressurizing pump is introduced into the cuff through the bypass passage so as to rapidly raise the pressure. After a predetermined level is reached, the air form the pressurizing pump is charged into the cuff through the air noise removing filter.