أخبار

يتكون جهاز غسيل الكلى من غشاء غسيل الكلى وهيكله الداعم ليحل محل الكلى. غشاء غسيل الكلى هو الجزء الرئيسي من دياليزر ، الذي يفصل الدم عن دياليسات. أثناء الغسيل الكلوي ، يتدفق الدم والدالي في اتجاهين متعاكسين على جانبي الغشاء ، ويتم تبادل الماء والمذيبات من خلال الغشاء شبه النفاذي. يحدد أداء جهاز تحليل الكلى تأثير علاج غسيل الكلى وهو عامل مرجعي مهم لتطوير برامج غسيل الكلى.

The characteristics of the جهاز تحليل الدم are composed of two parts: design characteristics and working characteristics. Design features include the configuration of the دياليزر, the pre-charge of the blood chamber and the dialysate chamber, the type of membrane, and the biocompatibility. Working characteristics include the transfer rate of different solutes and water. There are several classification methods for دياليزرs.

أو. تصنيف وفقا لتكوين دياليزر

Dialyzers are divided into tube type, flat type, and hollow fiber type. At present, the commonly used دياليزرs are hollow fiber type, and the flat-type and tube-type دياليزرs used in the early days have been basically eliminated.

The محول ألياف مجوف is composed of 8000-12000 hollow fibers, the fiber inner diameter is 200-300um, and the wall thickness is 2-30um. The hollow fibers are bundled into bundles and placed in the formed دياليزر casing, and the casing and the dialyzing membrane are sealed with polyurethane. The blood flows through the hollow fibers, and the dialysate flows in the opposite direction outside the fibers.

Ⅱ. تصنيف وفقًا لمواد الغشاء من الدياليزر

وفقًا لمواد الغشاء ، يمكن تقسيم المحولات إلى 4 فئات:

1. Regenerated cellulose membrane دياليزر, including copper imitation membrane and copper ammonia membrane دياليزر. There are free hydroxyl groups on the surface of cellulose, which can react with blood components and has poor biocompatibility. After the Cupra treatment, the fiber surface is smoother and the biocompatibility is improved.

2. Acetate cellulose membrane دياليزر. The cellulose is acetylated before the film is formed, which improves the biocompatibility and performance of the film.

3. Replace the fiber membrane دياليزر. Blood imitation membrane is an alternative copper imitation membrane because its surface-free hydroxyl groups are covered by tertiary ammonia compounds, which have good biocompatibility.

4. Synthetic fiber membrane دياليزر. Materials for this دياليزر include polyacrylonitrile, polymethylmethacrylate, polysulfone, polycarbonate, polyethylene, and polyamide. They have a higher transport coefficient and ultrafiltration coefficient, better biocompatibility, but a higher price.

نفسجي. تصنيف وفقًا لمعامل الترشيح البالغ للدياليزر

According to the ultrafiltration coefficient, there are two different أنواع المحلل:

1. Low ultrafiltration coefficient دياليزر. Ultrafiltration coefficient <15ml/(mmHg.h㎡), including copper imitation membrane, cuprammonium membrane, blood imitation membrane, and cellulose acetate membrane.

2. High-throughput and high-efficiency دياليزر. Ultrafiltration coefficient> 15 ml/(mmHg.h㎡), has a very high removal rate for medium molecular weight substances and can remove large molecular weight β2-microglobulin and other macromolecular substances. Typical high-efficiency جهاز تحليل الدمs include polysulfone membrane series, PAN membrane, PMMA membrane, and cellulose acetate membrane دياليزر.

قد تكون مهتمًا أيضًا بالمنتجات التالية:

جهاز تحليل التدفق العالي

سلك توجيه طبي

قسطر بالونات PTA

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