Microdialysis system
First Claim
1. Microdialysis system comprisinga microdialysis probe (12) that can be inserted in organic tissue (10) and has a dialysis membrane (28) to separate a probe channel (18) from the tissue (10), a sensor cell (14) for the detection of components in the perfusion fluid that is conveyed from the microdialysis probe (12) and a transport device (16) to convey a perfusion fluid through the probe channel (18) of the microdialysis probe (12) to the sensor cell (14), characterized in that the transport device (16) has a pressure pump unit (30) connected on a pressure side to an inlet (20) of the probe channel (18) and a suction pump unit (31) having a suction side and being connected on the suction side to an outlet (24) of the probe channel (18) the suction pump unit operating simultaneously with the pressure pump unit (30).
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Accused Products
Abstract
The invention concerns a microdialysis system comprising a microdialysis probe (12) that can be inserted into organic tissue (10) and has a dialysis membrane (28) to separate a probe channel (18) filled with perfusion fluid from the tissue (10), a sensor cell (14) to determine the concentration of components and especially glucose in the perfusion fluid that is conveyed from the microdialysis probe (12) and a transport device (16) to convey the perfusion fluid through the probe channel (18) of the microdialysis probe (12) to the sensor cell (14). In order to enable a substantially pressureless transport of perfusion fluid through the microdialysis probe and thus to prevent undesired passage of fluid through the dialysis membrane (28), it is proposed that the transport device (16) has a pressure pump unit (30) connected on the pressure side to the inlet (20) of the probe channel (18) and a suction pump unit (31) connected on the suction side to the outlet (24) of the probe channel (18) that can be operated simultaneously with the pressure pump unit (30).
202 Citations
46 Claims
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1. Microdialysis system comprising
a microdialysis probe (12) that can be inserted in organic tissue (10) and has a dialysis membrane (28) to separate a probe channel (18) from the tissue (10), a sensor cell (14) for the detection of components in the perfusion fluid that is conveyed from the microdialysis probe (12) and a transport device (16) to convey a perfusion fluid through the probe channel (18) of the microdialysis probe (12) to the sensor cell (14), characterized in that the transport device (16) has a pressure pump unit (30) connected on a pressure side to an inlet (20) of the probe channel (18) and a suction pump unit (31) having a suction side and being connected on the suction side to an outlet (24) of the probe channel (18) the suction pump unit operating simultaneously with the pressure pump unit (30).
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16. A microdialysis system comprising
a microdialysis probe formed to be inserted in organic tissue to collect fluid from the tissue, the probe defining a probe channel having an inlet and an outlet and including a dialysis membrane, the dialysis membrane being formed to permit diffusion of fluid into the channel and to separate the probe channel from the surrounding tissue, a sensor cell, and a transport device formed to convey the fluid from the microdialysis probe to the sensor cell, the transport device including a pressure pump unit in communication with the inlet and a suction pump unit having a pressure side and a suction side and the suction side is in communication with the outlet, the pressure and suction pump units being formed to operate simultaneously with one another.
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32. A microdialysis system comprising
a microdialysis probe formed to be inserted in organic tissue to collect fluid from the tissue, the probe defining a probe channel having an inlet and an outlet and including a dialysis membrane, the dialysis membrane being formed to permit diffusion of fluid into the channel and to separate the probe channel from the surrounding tissue, a sensor cell, a transport device formed to convey the fluid from the microdialysis probe to the sensor cell, the transport device including a pressure pump unit in communication with the inlet and a suction pump unit in communication with the outlet, the pressure and suction pump units being formed to operate simultaneously with one another, and a reagent pump unit formed to meter a reagent solution into the fluid upstream of the sensor cell.
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38. A microdialysis system comprising
a microdialysis probe formed to be inserted in organic tissue to collect fluid from the tissue, the probe defining a probe channel having an inlet and an outlet and including a dialysis membrane, the dialysis membrane being formed to permit diffusion of fluid into the channel and to separate the probe channel from the surrounding tissue, a sensor cell including a flow chamber, a reservoir for perfusion fluid, and a transport device formed to convey the fluid from the microdialysis probe to the flow chamber of the sensor cell, the transport device including a pressure pump unit having a pressure side in communication with the inlet and a suction side in communication with the reservoir and a suction pump unit having a suction side in communication with the outlet and a pressure side in communication with the flow chamber of the sensor cell, the pressure and suction pump units being formed to operate simultaneously with one another.
Specification