| 摘要 |
The invention relates to a microperfusion device for extracting at least one constituent of a body fluid through a subcutaneously planted perfusion catheter (5). The device comprises: a) a housing (1), b) a supply of perfusate (7), c) a hollow needle (4) which penetrates the housing (1) and has a front needle opening (9) and a rear needle opening (10), d) the perfusion catheter (5) which extends from the housing (1) and surrounds the needle (4) e) and an evacuation channel (8) located in the housing (1), said channel being connected to the perfusion catheter (5) for evacuating the perfusate, f) whereby the needle (4) is accommodated by the housing (1) in such a way that it can be displaced from a front displacement position, in which it penetrates the perfusion catheter (5), into a rear displacement position, in which the front needle opening (9) projects into the perfusion catheter (5) and is covered by the latter (5), g) and the rear needle opening (10) forms a connection for fluid from the perfusate supply (7) into the needle (4), at least in the rear displacement position of the needle (4). |
