Platelet separation bag and method for manually separating platelet

Abstract

The invention discloses a platelet separation bag and a method for manually separating platelet, belonging to the field of medical instruments and apparatuses and separation of blood. The method comprises the steps of: after whole blood is heavily centrifuged, respectively extruding blood plasma from the upside and separating erythrocytes from the downside, then lightly centrifuging, and extracting leukocytes and residual erythrocytes to obtain concentrated platelet. The platelet separation bag comprises a blood collecting bag, a blood plasma collecting bag and an erythrocyte collecting bag which are mutually connected, and a transfer bag capable of being used for secondarily centrifuging and separating residual erythrocytes in the blood plasma. According to the invention, a white film layer is remained in the original blood collecting bag, thus the loss of the white film in a transfer process is greatly reduced, the complete white film layer is remained, and thus the high-concentration platelet is obtained, and the recycling rate of the platelet is remarkably higher than that of the platelet by other manual recycling methods. According to the invention, the erythrocytes and the blood plasma can be better extracted, thus the waste of blood components is avoided, the cost is far lower than that of the apheresis platelet, and the economic load of a patient is favorably reduced.

Description

technical field [0001] The invention relates to the field of medical equipment and blood component separation, in particular to a platelet separation bag and a method for manually separating platelets. Background technique [0002] As we all know, blood is divided into three layers after heavy centrifugation, the upper layer is the plasma layer, the lower layer is the red blood cell layer, and the middle layer is called the buffy coat layer, which mainly includes platelets and white blood cells. The platelets can be re-suspended in the plasma after the quantitative return to the plasma and light centrifugation. Due to the large specific gravity, the leucocytes and red blood cells are precipitated in the bottom layer after light centrifugation. The concentrated platelets in the upper layer are used to treat patients with massive bleeding caused by thrombocytopenia. Realize the multi-purpose of one blood, symptomatic treatment. [0003] The existing platelet separation method...

AI Technical Summary

Problems solved by technology

Manual separation of platelets is divided into platelet-rich plasma method and buffy coat method. The recovery rate of concentrated platelets collected by the rich method is low, only 45±10%, and there are many residual red blood cells, which are visible to the naked eye. For cross-matching blood, a treatment dose usually requires 6 servings, which requires 6 times of cross-matching blood, and the operation is cumbersome

The buffy coat method can reduce the residual amount of red blood cells and eliminate cross-matching. The recovery rate is slightly higher than that of the enrichment method, up to 56±10%. One of the reasons is that the existing buffy coat method needs to transfer the buffy coat layer to other bags in the process of recovering platelets. This process will cause a large loss of buffy coat and the recovery rate of platelets is not high.

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