Infusion means
First Claim
1. An infusion means comprising:
- a fluid container;
a hose pump for administering fluid to a patient at a controlled rate;
a measuring chamber provided between the fluid container and the hose pump;
filling level detection means for detecting a lower level of fluid in the measuring chamber and an upper level of fluid in the measuring chamber;
control means for releasing fluid from the fluid container to the measuring chamber when fluid in the measuring chamber reaches the lower level and for stopping the release of fluid from the fluid container to the measuring chamber when fluid in the measuring chamber reaches the upper level;
measuring means for measuring a first time period between the time that fluid in the measuring chamber reaches the upper level and the time that fluid in the measuring chamber reaches the lower level,calculating means for calculating a quotient equal to the first time period divided by a second predetermined time period,adjustment means for adjusting the pump speed after lapse of the first time period by an amount proportional to the calculated quotient.
1 Assignment
0 Petitions
Accused Products
Abstract
Infusion liquid flows from a container via a hose controlled by a squeezing valve into a measuring chamber which has an existing predetermined upper filling level and a predetermined lower filling level which may be detected by a filling level detector. A hose pump conveys liquid from the measuring chamber to the patient. In order to adjust the rate of the hose pump in accordance with the provided infusion rate, the time required in case of the closed squeezing valve to pump off fluid from the upper filling level to the lower filling level is determined. Subsequently, the measuring container is refilled within a filling time, while pump is further operative or may be also stopped. The measuring chamber including the hoses connected thereto may be designed as a disposable unit.
67 Citations
8 Claims
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1. An infusion means comprising:
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a fluid container; a hose pump for administering fluid to a patient at a controlled rate; a measuring chamber provided between the fluid container and the hose pump; filling level detection means for detecting a lower level of fluid in the measuring chamber and an upper level of fluid in the measuring chamber; control means for releasing fluid from the fluid container to the measuring chamber when fluid in the measuring chamber reaches the lower level and for stopping the release of fluid from the fluid container to the measuring chamber when fluid in the measuring chamber reaches the upper level; measuring means for measuring a first time period between the time that fluid in the measuring chamber reaches the upper level and the time that fluid in the measuring chamber reaches the lower level, calculating means for calculating a quotient equal to the first time period divided by a second predetermined time period, adjustment means for adjusting the pump speed after lapse of the first time period by an amount proportional to the calculated quotient. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In an infusion means including a fluid container, a hose pump for administering fluid to a patient at a controlled rate, and a measuring chamber provided between the fluid container and the hose pump, an infusion process comprising the steps of:
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detecting a lower level of fluid in the measuring chamber, detecting an upper level of fluid in the measuring chamber, releasing fluid from the fluid container to the measuring chamber when fluid in the measuring chamber reaches the lower level, stopping the release of fluid from the fluid container to the measuring chamber when fluid in the measuring chamber reaches the upper level, measuring a first time period between the time that fluid in the measuring chamber reaches the upper level and the time that fluid in the measuring chamber reaches the lower level, calculating a quotient equal to the first time period divided by a second, predetermined time period, and adjusting the pump speed after lapse of the first time period by an amount proportional to the calculated quotient.
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Specification