Medical treatment system and methods using a plurality of fluid lines

摘要

A medical treatment system, such as peritoneal dialysis system, may include control and other features to enhance patient comfort and ease of use. For example, a peritoneal dialysis system may include patient line state detector for detecting whether a patient line is primed before it is to be connected to the patient. The patient line state detector can also the ability to detect whether a patient line has been properly mounted for priming. Both patient line presence/absence and fill state can be determined using an optical system, e.g., one that employs a single optical sensor.

主权项

1. A peritoneal dialysis system, comprising:
at least one pump arranged to pump dialysate for delivery to a peritoneal cavity of a patient; a patient line fluidly coupled to the at least one pump such that dialysate delivered from the pump is directed to the patient line, the patient line having a distal end arranged for connection to a patient; and a patient line state detector arranged to be associated with the patient line and to detect both a presence of the patient line and a priming condition of the patient line, wherein the patient line state detector includes: a first light emitter having a first optical axis directed toward a space in which a portion of the patient line is to be positioned, the first light emitter positioned next to a side of the space at a predetermined point longitudinally along the space; a second light emitter having a second optical axis directed toward the space, the second light emitter being next to the first light emitter, and located at approximately the same point longitudinally along the space as the first light emitter; a third light emitter having a third optical axis that is arranged at an oblique angle relative to the sensor optical axis; and an optical sensor positioned on a side of the space opposite the first and second light emitters and arranged to receive light emitted by the first and second light emitters to determine a presence or absence of the patient line in the space, wherein the optical sensor has a sensor optical axis, and wherein the optical sensor and third light emitter are arranged such that with a portion of the patient line in the space and the portion of the patient line containing no liquid, a light level detected by the optical sensor is over a threshold level, and such that with a portion of the patient line in the space and the portion of the patient line containing liquid, a light level detected by the optical sensor is less than the threshold level.