Hemodialyzer, hemodialysis device and hemodialysis method

Abstract

The invention discloses a hemodialyzer which comprises two dialysis tubes. The two dialysis tubes are connected into a Y shape, and the two dialysis tubes are communicated with each other at the joint and provided with a middle connector; the end, away from the middle connector, of each dialysis tube is provided with a blood interface and a dialysis fluid interface; a hollow fiber membrane is arranged in each dialysis tube; the whole hollow fiber membranes are arranged in the two dialysis tubes respectively, and the diameter of a hollow fiber membrane bundle in each dialysis tube is reduced under the condition that the number of the whole hollow fiber membranes is unchanged, so that sufficient dialysis is conducted on blood in the dialysis tubes and dialysis fluid; blood needs to flow back in the Y-shaped hemodialyzer, so that the blood flow distance and time are increased, and the dialysis efficiency is improved; when a patient feels uncomfortable, the blood can only flow out from the middle connector by means of one dialysis tube, so that the pre-congestion amount during dialysis is reduced, the discomfort of the patient is relieved, and the dialysis process does not need to be interrupted. The invention further discloses a hemodialysis device and method using the hemodialyzer.

Description

technical field [0001] The invention relates to medical equipment, in particular to a hemodialyzer, a hemodialysis device and a hemodialysis method. Background technique [0002] Hemodialysis is to use the principle of semi-permeable membrane to introduce the patient's blood and dialysate into the dialyzer at the same time. The two flow in opposite directions on both sides of the dialysis membrane. The gradient achieves the purpose of removing toxins and excess water in the blood, replenishing the substances needed by the body, and maintaining electrolyte and acid-base balance. The ability of the dialyzer to remove toxins and water in the blood is expressed by the clearance rate (that is, how many milliliters of blood can completely remove a certain solute per minute, expressed in ml / min) and the ultrafiltration coefficient (that is, the energy per mmHg per hour). How many ml of water is removed, expressed in ml / h.mmhg). It is directly proportional to the size of the diffu...

AI Technical Summary

Problems solved by technology

[0004] 2. Increase the area of ​​the semi-permeable membrane of the dialyzer, but if the area is too large, it will cause the activation of the rest system and immune response, and at the same time increase the prefilling volume of blood, increase the blood resistance and the risk of thrombosis

[0006] Therefore, the membrane area (1.0-2.0㎡) and fiber length (30-40cm) of an ordinary in-line hollow fiber dialyzer must be controlled within a certain range, and the clustered hollow fibers are installed in a straight plastic shell. Forming a dialysis unit, the center of this clustered hollow fiber is difficult to fully and effectively contact with the dialysate, thus greatly reducing its dialysis efficiency

In addition, when patients experience abnormal conditions such as hypotension, they can only choose to interrupt dialysis

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