| 摘要 |
A method for generating a flow by a peristaltic hose pump, a generated fluid pressure being limited to 500 mbar and being achieved and maintained without a pressure measurement during operation of the pump. A length of a flexible and elastic pump segment of a hose is adjusted such that, while a roller wheel is stationary, and while the segment is guided under tension around the roller wheel, and when applying a fluid pressure in the range from 10 to 400 mbar to one end of the pump segment, a backflow leakage in the opposite direction to the direction of rotation of the roller wheel is created, and a flow of the fluid of at least 0.01 l/min through the pump segment is obtained, taking into account the backflow leakage. The distance of fixing points of each end of the pump segment to the roller wheel rotation axis is fixed. |
| 主权项 |
1. A method for generating a flow through a body cavity by introduction of a medical instrument, the flow being generated by a peristaltic hose pump, a generated fluid pressure being limited to 500 mbar, said pressure being achieved and maintained without a pressure measurement obtained by a pressure sensor during operation of the peristaltic hose pump, the method including:
an adjusting step for adjusting a hose, having a flexible and elastic pump segment, the pump segment having two respective opposite ends, each end being fixable in a direction along a same line as a roller wheel rotatable about a roller wheel axis by means of one fixing point (P1, P2) each, and the pump segment being guided around the roller wheel under elastic tension, wherein a length of the pump segment, is adjusted such that while the roller wheel is stationary, and while the pump segment is guided under tension around the roller wheel, and when applying a fluid pressure in the range from 10 to 400 mbar to one end (P1, P2) of the pump segment, a backflow leakage in the opposite direction to the direction of rotation of the roller wheel is created, and a flow of the fluid of at least 0.01 l/min through the pump segment is obtained, taking into account the backflow leakage, and an operation step, wherein the peristaltic hose pump is operated in order to generate flow of 0.1-1 l/min through a body cavity with a maximum pressure of 500 mbar, and in which the distance of each of the fixing points to the roller wheel rotation axes is fixed. |
