Flow control valves for leakage detection, free-flow prevention and occlusion detection
First Claim
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1. An injection device for injecting a fluid into an organism, the injection device comprising:
- a fluid providing section including a container for storing the fluid and a pump unit for supplying the fluid, the pump unit comprising a displacement member, a driven member and a driving unit; and
a fluid injecting section for injecting the fluid provided by the fluid providing section into the organism and a catheter means, whereinthe fluid injecting section is provided with a pressure recognition arrangement for detecting at least one of a pressure increase and a pressure loss in the fluid injecting section, the pressure recognition arrangement comprising a fluid pressure sensor, a control unit, a permanent memory, and at least one control valve, the at least one control valve is a cracking valve that opens the at least one control valve above a cracking pressure, permitting flow through the at least one control valve, and closes the at least one control valve below the cracking pressure, wherein the control unit is configured to extrapolate a time series of measured pressure values in the fluid injecting section and to send a signal to an alarm device if the extrapolated values attain a certain relation to at least one given reference pressure value.
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Abstract
An injection device for injecting a fluid into an organism, in particular a human or animal body, which can comprise a fluid providing section including a container for storing the fluid and a supply means for supplying the fluid. The fluid injecting section for injecting the fluid provided by the fluid providing section into the organism includes a catheter means and is characterized by the fluid injecting section being provided with a pressure recognition arrangement which can be located close to and/or in the catheter means for detecting a pressure increase and/or a pressure loss.
30 Citations
11 Claims
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1. An injection device for injecting a fluid into an organism, the injection device comprising:
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a fluid providing section including a container for storing the fluid and a pump unit for supplying the fluid, the pump unit comprising a displacement member, a driven member and a driving unit; and a fluid injecting section for injecting the fluid provided by the fluid providing section into the organism and a catheter means, wherein the fluid injecting section is provided with a pressure recognition arrangement for detecting at least one of a pressure increase and a pressure loss in the fluid injecting section, the pressure recognition arrangement comprising a fluid pressure sensor, a control unit, a permanent memory, and at least one control valve, the at least one control valve is a cracking valve that opens the at least one control valve above a cracking pressure, permitting flow through the at least one control valve, and closes the at least one control valve below the cracking pressure, wherein the control unit is configured to extrapolate a time series of measured pressure values in the fluid injecting section and to send a signal to an alarm device if the extrapolated values attain a certain relation to at least one given reference pressure value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification