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Hemodialyzer

A technology of hemodialysis and dialyzer, applied in dialysis system, dialysis, semi-permeable membrane separation, etc., can solve the problems of damaged dialyzer function and achieve the effect of restoring function

Active Publication Date: 2008-03-12
JMS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the dialysis treatment is continued, the clogging of the membrane pores is caused by the continuous occurrence of protein adhesion (fouling) or the accumulation of other thrombus, etc., thereby significantly impairing the original function of the dialyzer.

Method used

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Examples

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Embodiment 1

[0029] FIG. 3 shows the actual flow direction and flow rate (mL / min) of blood and dialysate in the blood circuit and dialysate supply and discharge conduit shown in FIG. 1 . The TMP (UFR is also acceptable) after the start of dialysis is stored, and when the TMP value that increases with the progress of the dialysis treatment reaches the set value (30 to 300 mmHg), the flushing operation starts.

[0030] During dialysis treatment, the third fluid delivery mechanism operates to remove water at the water removal speed set in the right direction (direction opposite to the arrow in FIG. 1 in the direction of discharge). Also, regarding TMP, the difference between the venous pressure (the pressure in the blood circuit on the venous side) and the dialysate pressure (the pressure in the dialysate supply catheter) is calculated. If the pressure measurement in the circuit is equipped with the venous pressure P V and arterial pressure P A , using P V and P A TMP is calculated as the ...

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Abstract

The object of the present invention is to provide a hemodialysis device capable of correctly grasping the continuous aging of hollow fiber membrane performance during dialysis and recovering its performance quickly and accurately. The hemodialysis device is connected to the arterial side of the dialyzer (1) with an arterial side blood circuit (2) with a blood pump (7) and to the venous side of the dialyzer (1) with a venous side blood circuit (3), And the dialysate supply conduit (4) and the dialysate discharge conduit (5) are respectively connected on the side of the dialyzer (1), and a detector (15) for measuring the pressure in the above-mentioned blood circuit is arranged in the hemodialysis device, and the pressure in the blood circuit is measured. The detector (16) of the pressure in the above-mentioned dialysate conduit calculates the pressure difference between the membranes according to the pressure measured by these detectors. When the pressure difference between the membranes rises above a certain value, the dialyzer (1) inverse filtering. The flushing action is performed by reverse filtration, so that the clogging of the pores of the dialysis membrane of the dialyzer (1) is eliminated, and the performance of the dialyzer (1) is restored.

Description

technical field [0001] The invention relates to a hemodialysis device for blood purification using extracorporeal circulation as a treatment for replacing the renal function of patients with chronic renal failure in the medical field. Background technique [0002] For the treatment of renal failure, various blood purification methods have been proposed as a method of purifying the blood taken out of the patient's body and then returning it to the body. Hemodialysis (HD), hemofiltration (HF) for body fluid removal replacement by ultrafiltration, and hemodiafiltration (HDF) combining them. [0003] In either mode, a semi-permeable membrane (dialysis membrane) formed by a plurality of bundles of hollow fiber-shaped cellulose membranes, polyacrylonitrile membranes, or polysulfone membranes (dialysis membranes) is filled in the cylindrical shell to pass through the dialysis membranes. A hemodialyzer (dialyzer) mainly performs diffusion and / or filtration of blood and dialysate to...

Claims

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Application Information

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IPC IPC(8): A61M1/14B01D61/30B01D65/02
CPCA61M2205/7554A61M1/16A61M2001/1609A61M2001/3612B01D61/32A61M2001/365B01D2321/04B01D65/02A61M1/1609A61M1/3612A61M1/365A61M2205/3331A61M2205/50
Inventor 金成泰山本千惠子濑川贺世子山中邦彦正冈胜则
Owner JMS CO LTD
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