摘要:
An optical fiber is formed by performing vapor phase deposition of SiO2 on the outside of a glass rod comprising a core section and a first cladding section and drawing a glass preform which formed by a second cladding section. Also, a single mode optical fiber is manufactured so that the ratio of the diameter D of the first cladding section and the diameter d of the core section is in a range of 4.0 to 4.8, and OH concentration is 0.1 ppm or less. Also, an optical fiber is manufactured so that a value of D/d>4.8, and the OH concentration is 0. 1 ppm or less. It is thereby possible to maintain an initial loss in the 1380 nm wavelength range even if hydrogen diffusion occurs.
摘要:
A blood pressure measuring apparatus to measure blood pressure based on a change in a pressure by a cuff mounted to a subject comprises: cuff pressure controlling means for deflating the cuff after avascularization by the cuff at a body part around which the cuff is placed; detecting means for detecting the change in a pressure by the cuff and outputting the detection as an electrical signal; extracting means for extracting a pulse wave signal from the electrical signal; and calculating means for calculating a systolic blood pressure value and a diastolic blood pressure value based on a relation between a change rate of an index value which is calculated by multiplying a maximum amplitude of each pulse of the pulse wave signal by the cuff pressure corresponding to the maximum amplitude and a predetermined value. The blood pressure measuring apparatus achieves a high-speed measurement while suppressing the reduction of accuracy.
摘要:
An apparatus for measuring an inferior-and-superior-limb blood-pressure index of a living subject, including an inferior-limb blood-pressure measuring device, a superior-limb blood-pressure measuring device, an index determining means for determining the inferior-and-superior-limb blood-pressure index, based on a systolic blood pressure of an inferior limb, measured by the inferior-limb blood-pressure measuring device and a systolic blood pressure of a superior limb, measured by the superior-limb blood-pressure measuring device, an estimated-inferior-limb-systolic-blood-pressure determining means for determining an estimated systolic blood pressure of the inferior limb, an estimated-superior-limb-systolic-blood-pressure determining means for determining an estimated systolic blood pressure of the superior limb, and a cuff-pressure control means for controlling at least one of respective pressures of the inferior-limb cuff and the superior-limb cuff, such that when the respective pressures of an inferior-limb cuff and a superior-limb cuff are decreased, the respective pressures of the inferior-limb cuff and the superior-limb cuff become equal to the respective estimated systolic blood pressures of the inferior limb and the superior limb, at the same time.
摘要:
An apparatus for measuring a superior-and-inferior-limb blood-pressure index of a living subject, including a first blood-pressure measuring device which measures a first blood pressure of a right inferior limb of the subject, a second blood-pressure measuring device which measures a second blood pressure of a left inferior limb of the subject, a third blood-pressure measuring device which measures a third blood pressure of a superior limb of the subject, a first information obtaining device which obtains first information relating to a first velocity of propagation of a first pulse wave which propagates through a first route a portion of which runs in the right inferior limb, a second information obtaining device which obtains second information relating to a second velocity of propagation of a second pulse wave which propagates through a second route a portion of which runs in the left inferior limb, a selecting device for selecting one of the measured first and second blood pressures that corresponds to one of the first and second information that relates to a lower one of the first and second velocities, and an index determining device for determining the superior-and-inferior-limb blood-pressure index, based on the selected one of the first and second blood pressures, and the measured third blood pressure.
摘要:
An apparatus for measuring a superior-and-inferior-limb blood-pressure (“BP”) index of a living subject, including an inferior-limb BP measuring device which includes a first inflatable cuff adapted to be wound around an inferior limb of the subject and which measures an inferior-limb BP value of the subject based on a first pulse wave obtained while a first pressure of the first cuff is changed, a superior-limb BP measuring device which includes a second inflatable cuff adapted to be wound around a superior limb of the subject and which measures a superior-limb BP value of the subject based on a second pulse wave obtained while a second pressure of the second cuff is changed, a cuff-pressure changing device which changes the first and second pressures of the first and second cuffs, such that a time when the first pressure being changed becomes equal to an estimated inferior-limb BP value coincides with a time when the second pressure being changed becomes equal to an estimated superior-limb BP value, and an index determining device for determining the BP index of the subject, based on the inferior-limb and superior-limb BP values measured by the inferior-limb and superior-limb BP measuring devices while the first and second pressures of the first and second cuffs are changed by the cuff-pressure changing device.
摘要:
An optical fiber manufacturing apparatus for manufacturing an optical fiber by drawing a optical fiber preform, including: a drawing furnace having therein a muffle tube into which the optical fiber preform is inserted and heating the optical fiber preform; and a first seal member which is disposed at an insert side of the drawing furnace so as to be coaxial with the drawing furnace and which seals the optical fiber preform inserted into an opening formed at the center thereof, wherein the first seal member includes a plurality of inner-circumference slits formed in the inner circumference thereof and a plurality of outer-circumference slits formed in the outer circumference thereof.
摘要:
A method of attaching and detaching a preform to and from a support body, the preform being used to manufacture an optical fiber, the method including: inserting a connection pin through a penetration hole provided in the preform and a penetration hole provided in the support body; attaching the preform to the support body by hanging the preform on the connection pin inserted through the penetration holes; and detaching the preform from the support body by taking out the connection pin from the penetration holes after the connection pin is rotated about an insertion axis due to an action of a moment based on gravity when the hung state of the preform hung on the connection pin is released.
摘要:
An optical fiber is constituted by: a three-layer structured core which includes, a first core (having a relative refractive index difference of Δ1 in a region of a radius of R1), a second core (having a relative refractive index difference of Δ2 in a region from the radius R1 to a radius of R2), and a third core (having a relative refractive index difference of Δ3 in a region from the radius of R2 to a radius of R3), wherein the relative refractive index differences have relationships of Δ1>Δ2, Δ3>Δ2, and Δ3>Δ1, when Δ1−Δ2=X and Δ3−Δ2=Y, (X+Y)>0.4% is satisfied, and X and Y satisfy 0.25%
摘要:
A remote diagnosis system including a patient-side device including a physical-information obtaining device which obtains a piece of current physical information from a patient, a plurality of doctor-side devices which are provided in a plurality of medical institutions, respectively, that are remote from the patient-side device and each of which can receive the piece of current physical information of the patient from the patient-side device, a preliminary-diagnosis device for making, based on the piece of current physical information obtained by the physical-information obtaining device, a preliminary diagnosis about whether the patient needs a proper diagnosis to be made by a doctor, and a physical-information transmitting device for transmitting, when the preliminary-diagnosis device makes a preliminary diagnosis that the patient needs a proper diagnosis to be made by a doctor, the piece of current physical information to at least one selected doctor-side device out of the plurality of doctor-side devices.
摘要:
Disclosed is a sphygmomanometer exhaust valve having a valve that functions as a lever, and in which a solenoid moves the point of force of the valve to urge a valve membrane formed at the point of action against a ventilation port. A support member supports the valve while fixing its fulcrum. When no electric current is supplied to the solenoid, the support member holds the valve in a predetermined position in which the ventilation port is open.