Tanita Corporation

Yoshinori Fukuda

Hitoshi Sato

Koji Oguma

Tsutomu Miyoshi

Katsumi Takehara

Tomio Sato

Maki Ishigooka

Yasushi Yamada

Shuichi Izumi

Steven B Heymsfield

Koki Inoue

Mitsugu Kamada

There are provided a shielded cable having a core wire for carrying an electrical signal, and a shield around the circumference of the core wire and connected to the core wire via a drive circuit, wherein the drive circuit has a band limiting circuit which decreases an output voltage in a predetermined frequency band; and an apparatus which acquires a bioelectrical impedance value or biological composition data by using the shielded cable.

Shielded cable, and bioelectrical impedance value or biological composition data acquiring apparatus using the same

An apparatus is provided which allows a subject to determine by himself/herself whether or not he/she is apt to develop a deep-vein thrombosis in a region of a lower limb in a simple manner. A variation between the bioelectric impedance values measured respectively before and after a posture change is compared with a reference value. The posture change includes a bending and stretching exercise, a bending and stretching in knees in a seated position and a repeating of standing-up and sitting-down motion. Alternatively, a blood storage capacity of the lower limb region may be estimated from a gradient of bioelectric impedance represented by a variation thereof per unit time to determine whether or not the subject is apt to develop deep-vein thrombosis in the lower limb region.

Deep-vein thrombosis determination apparatus

Disclosed is an improved bioelectrical impedance gauge which is so designed that the high-frequency current flowing between two selected points in a living body may be detected in the vicinity of either selected point, and that the voltage appearing between two points selected in the current passage in which the high-frequency current flows may be applied to a high-impedance buffer circuit proximate to the two points selected in the current passage.

Apparatus for measuring the bioelectrical impedance of a living body

Disclosed is a impedance measuring apparatus which is easy to use, and which is guaranteed to be free of incorrect measurement caused by some joints appearing in the current flowing passage intervening between two selected body parts and by the indefinite length between two selected body parts. The measuring apparatus of the present invention limits the place of the body under measurement to &ldquo;one body region&rdquo;, i.e. a selected joint-to-joint body portion or joint-free body portion such as the forearm extending from the wrist to the elbow or the portion extending from the ankle to the knee, and comprises a housing having a contact surface to be applied to one selected body region; a first pair of measurement current supplying electrodes so placed on the contact surface that the one selected body region may be put in contact with the current electrodes; and a first pair of voltage measuring electrodes so placed on the contact surface between the pair of current electrodes that the one selected body region may be put in contact with the voltage electrodes.

Bioelectrical impedance measuring apparatus

Disclosed is an edema measuring method comprising the steps of: putting at least two pairs of electrodes on different locations selected in the body; making an alternating current to flow in the body via one pair of electrodes; measuring voltage appearing between the other pair of electrodes; calculating impedance on the basis of the supplied alternating current and the measured voltage; and calculating an index value representing the degree of edema on the basis of the impedance. Also, an apparatus using the method is disclosed.

Method for measuring the degree of edema and apparatus using the same

Bioelectrical impedence measuring method and body composition measuring apparatus

Disclosed is an apparatus for determining a degree of fatigue of a human body, comprising: two pairs of electrodes; an electric current source; a voltage measuring unit; an arithmetic unit; a storage unit; and a display unit. The two pairs of electrodes are configured to contact with a body of a person under test. The electric current source feeds a measurement current via selected ones of said electrodes. The voltage measuring unit measures a voltage between another selected ones of said electrodes. The storage unit stores a bioelectrical impedance calculated by said arithmetic unit and a reference value. The arithmetic unit calculates the bioelectrical impedance based on the measurement value from said voltage measuring unit and a degree of fatigue of the person under test by comparing the currently measured value of the bioelectrical impedance with the reference value of the bioelectrical impedance stored in the storage unit. The display unit indicates the degree of fatigue of the person under test.

Apparatus for determining degree of fatigue of human body

Disclosed is an apparatus for determining a degree of restoration of a diseased part, comprising: two pairs of electrodes; an electric current source; a voltage measuring unit; and an arithmetic unit. According to the present invention said two pairs of electrodes are contacted with a skin in the surrounding area of the diseased part, and said electric current source feeds a measuring current via selected ones of said electrodes. Furthermore said voltage measuring unit measures a voltage between another selected ones of said electrodes, and said arithmetic unit calculates a parameter representing a degree of restoration of the diseased part based on the measurement data from said voltage measuring unit.

Apparatus for determining degree of restoration of diseased part

Disclosed is a dividable apparatus for measuring living body impedance in which a first housing section having a first current feeding electrode and a first measurement electrode mounted thereon can be physically separated from a second housing section having a second current feeding electrode and a second measurement electrode mounted thereon, but said first and second housing sections are kept electrically connected to each other via an electric cable , whereby said first and second housing sections can freely be positioned on any parts of the body for impedance measurement.

Dividable type apparatus for measuring living body impedance

High frequency current application electrodes are brought into contact with both hands, both feet, etc., which are extreme parts of a body in order to apply current to the parts of the body to be measured. Potential difference measuring electrodes are brought into contact with the parts to be measured along the path of the high frequency current. High frequency current application electrodes and potential difference measuring electrodes are selected to select the path of the high frequency current and the path of the potential difference measurement in accordance with the purpose. Impedance on each of the parts of the body is measured and body composition is derived.

Living body impedance measuring instrument and body composition measuring instrument

A body fat measuring apparatus for measuring body fat in a patient's body comprises apparatus for simultaneously measuring an impedance between the patient's feet, and for measuring the patient's height and the patient's weight, and a calculator for calculating body fat from the measured impedance value, height and weight. The calculator estimates body density using a formula having a correction term either for increasing the body density upon increase of the impedance compared to the original impedance or a correction term for decreasing the body density upon increase of the weight with respect to the original weight.

Growing community of inventors

Akita, Japan

Yoshinori Fukuda