JP4000546B2 - Blood separation chamber - Google Patents

Description

[0001]
[Industrial application fields]
The present invention is a blood chamber of a blood extracorporeal circuit.
[0002]
[Prior art]
Conventionally, there are several types of blood chambers, and a chamber having a structure that separates physiological saline and blood has been attempted. However, if air enters, there is a problem that the separated saline and blood are mixed.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to eliminate the problem of the chamber in which physiological saline and blood are mixed, and to keep the blood in extracorporeal circulation separated from the physiological saline.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, if the drawings are described,
(A) A lower upper filter (2) is provided on the lower chamber (1), and a middle chamber (3) is provided on the upper filter.
(A) A filter (4) is provided above the middle chamber (3), and an upper chamber (5) is provided thereon.
(C) The shape of the filter only needs to pass air and liquid.
[0005]
[Action]
In the chamber of the present invention, an upper filter is provided on the chamber, so that the physiological saline filled in the chamber above the upper filter causes air to float from the lower chamber to the upper chamber without being stirred by the circulating blood. Can be kept separated.
[0006]
[Implementation]
After actually filled with saline to make a same blood separation chamber as 1 to the upper chamber, with a blood pump results blood was circulated at 200 ml / min, the lower the top on the bottom of the chamber (1) By providing the filter (2) in the blood, when air flows in from the blood inlet (6), the blood separated from the physiological saline in the lower chamber (1) is stirred by the air flowing in. However, the air stops at the lower upper filter (2), and gradually rises to the middle chamber (3). Even if blood and air rise to the middle chamber (3), there is the middle upper filter (4). Therefore, the air is also stopped at the middle upper filter (4), and the air gradually rises to the upper chamber (5), so that the upper chamber is filled with physiological saline. (5) Most blood not floated in, little effect is without air were able to be kept 5 hours separation state of the blood for floating the stirring.
[0007]
【The invention's effect】
Most of the blood coagulation in the blood chamber is due to the direct contact between the air in the chamber and the circulating blood, but from the results of the above experiments, the air in the chamber is gently lowered by providing a filter above the blood inlet. Since the upper chamber is kept in a separated state with little contact with blood, blood coagulation can be prevented in advance. If blood coagulation is difficult, the amount of anticoagulant necessary for extracorporeal circulation can be reduced, which is therapeutically effective.
[Brief description of the drawings]
FIG. 1 is a perspective view of a chamber example.
[Fig. 2] A cross-sectional view of an example chamber.
[Explanation of symbols]
(1) Lower chamber (2) Lower upper filter (3) Middle chamber (4) Middle upper filter (5) Upper chamber (6) Blood inlet (7) Blood outlet (8) Chamber filter

Claims (1)

Lower upper filter air and liquid to above the blood inlet of the lower chamber passes is provided, middle chamber thereon, and the upper chamber is provided in the middle upper filter further, the blood separation chamber comprising a hierarchical chamber.

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