Abstract: Disclosed herein is a blood pressure measuring device including: a pressure measuring tool 110; a fastening member 120 configured to fasten the pressure measuring tool 110 in rest position onto a skin region covering an anastomotic region of a shunt blood vessel 201; and a control circuit 130 configured to receive an input signal from the pressure measuring tool 110 and to process the input signal to calculate a pressure inside the anastomotic region of the shunt blood vessel 201.

Abstract: An extracellular fluid volume calculator may include: an acquirement unit configured to acquire a membrane area of a dialyzer used for hemodialysis; and a processor configured to calculate a post-hemodialysis extracellular fluid volume based on a difference between a pre-hemodialysis amount of uric acid and a post-hemodialysis amount of uric acid. The processor may be configured to: calculate a removal amount of uric acid removed by hemodialysis based on a dialyzer overall mass transfer-area coefficient for uric acid; and calculate the dialyzer overall mass transfer-area coefficient for uric acid based on the membrane area of the dialyzer acquired by the acquirement unit.

Abstract: An extracellular fluid volume calculator may include: a first acquirement unit configured to acquire a pre-hemodialysis plasma uric acid concentration, a post-hemodialysis plasma uric acid concentration, a removal amount of uric acid by hemodialysis, and a removal volume of water during hemodialysis; and a first processor configured to calculate an extracellular fluid volume based on a difference between a pre-hemodialysis amount of uric acid and a post-hemodialysis amount of uric acid, the difference being determined based on the pre-hemodialysis plasma uric acid concentration, the post-hemodialysis plasma uric acid concentration, the removal amount of uric acid, and the removal volume of water acquired by the first acquirement unit.

Abstract: Disclosed herein is a blood pressure measuring device including: a pressure measuring tool 110; a fastening member 120 configured to fasten the pressure measuring tool 110 in rest position onto a skin region covering an anastomotic region of a shunt blood vessel 201; and a control circuit 130 configured to receive an input signal from the pressure measuring tool 110 and to process the input signal to calculate a pressure inside the anastomotic region of the shunt blood vessel 201.

Abstract: A hemodialysis system includes a body fluid volume calculating unit, a dialysis condition input unit with which blood flow velocity and dialysis fluid flow velocity in hemodialysis treatment performed after specific hemodialysis treatment can be input and input values of the blood flow velocity and the dialysis fluid flow velocity can be adjusted, a dialysis dose calculating unit configured to calculate, when the blood flow velocity and the dialysis fluid flow velocity are input to the dialysis condition input unit, by analyzing a mathematical model concerning urea kinetics, a dialysis dose of the hemodialysis treatment from the input blood flow velocity and the input dialysis fluid flow velocity, a body fluid volume calculated by the body fluid volume calculating unit, and the like, and a dialysis dose display unit configured to display the hemodialysis dose calculated by the dialysis dose calculating unit.

Abstract: The success rate of the insertion of a dull needle into a puncture hole is improved. A puncture needle is provided which is inserted into a puncture route that is formed to cover from a skin surface to a shunt vessel surface so as to expand an incision of a puncture hole formed in the shunt vessel surface. The puncture needle has an inclined end face that is inclined toward a front end of the needle, and a front end part of the inclined end face has an edge having no sharpness. Right and left side parts of the inclined end face which are contiguous with the front end part are respectively inclined outward, and side edges of the side parts are provided with cutting lines.

Abstract: A hemodialysis system includes a body fluid volume calculating unit, a dialysis condition input unit with which blood flow velocity and dialysis fluid flow velocity in hemodialysis treatment performed after specific hemodialysis treatment can be input and input values of the blood flow velocity and the dialysis fluid flow velocity can be adjusted, a dialysis dose calculating unit configured to calculate, when the blood flow velocity and the dialysis fluid flow velocity are input to the dialysis condition input unit, by analyzing a mathematical model concerning urea kinetics, a dialysis dose of the hemodialysis treatment from the input blood flow velocity and the input dialysis fluid flow velocity, a body fluid volume calculated by the body fluid volume calculating unit, and the like, and a dialysis dose display unit configured to display the hemodialysis dose calculated by the dialysis dose calculating unit.