| 摘要 |
The invention relates to a medical removal unit (1) for blood, comprising a needle carrier (2), at least one cannula (3), which has a distal and a proximal cannula segment (6, 7), and a hose-shaped sleeve (4), which has a closed sleeve end (12) and an open sleeve end (11). The sleeve (4) is fastened to a proximal needle-carrier end (10) by means of the open sleeve end (11) and surrounds the proximal cannula segment (7) in a sealing manner in such a way that an accommodating chamber (13) is formed. An air removal device (14) connects the accommodating chamber (13) to the outer environment in order that air flows out of the accommodating chamber and is formed by at least one outflow channel (15) arranged or formed in the needle carrier (2). A partial segment of the outflow channel (15) comprises a plurality of chambers (27, 28, 29) arranged one after the other and spaced apart from each other in an outflow direction and at least one connecting channel (30, 31) that connects chambers (27, 28, 29) arranged immediately adjacent in the outflow direction. The connecting channel has a flow cross-section that allows the air to flow through but at least largely prevents or completely stops the bodily fluid, in particular blood, from flowing through. |
| 主权项 |
1: Medical removal unit (1) for bodily fluids, in particular blood, comprising a needle carrier (2), which needle carrier (2) has a distal needle carrier end (9) and a proximal needle carrier end (10), at least one cannula (3), which cannula (3) comprises a distal cannula segment (6) for sticking into the body and a proximal cannula segment (7) for piercing a closing body of a collecting container, a removal channel (8), which removal channel (8) connects the distal cannula segment (6) to the proximal cannula segment (7), a hose-like elastically deformable and pierceable sleeve (4), which sleeve (4) comprises a closed proximal sleeve end (12) and an open distal sleeve end (11), wherein the distal sleeve end (11) of the sleeve (4) is secured to the proximal needle carrier end (10) of the needle carrier (2) and surrounds the proximal cannula segment (7) in a sealing manner forming an accommodating chamber (13), and with an air removal device (14), which air removal device (14) connects the accommodating chamber (13) for the outflow of air from the accommodating chamber (13) to the outer environment, wherein the air removal device (14) is formed by at least one outflow channel (15) arranged or formed in the needle carrier (2), wherein a portion of the outflow channel (15) comprises a plurality of chambers (27, 28, 29) arranged spaced apart from one another and behind one another in outflow direction and at least one connecting channel (30, 31) connecting chambers (27, 28, 29) arranged directly adjacent to one another in outflow direction and wherein the connecting channel (30, 31) has a flow cross-section which allows the through-flow of air, but prevents or completely blocks the passage of bodily fluid, in particular blood, at least for the most part. |
