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EP-4279099-B1 - INFUSION DEVICE

EP4279099B1EP 4279099 B1EP4279099 B1EP 4279099B1EP-4279099-B1

Inventors

  • HU, QING
  • Zou, Zhenzhong
  • XU, JIAN
  • LAU, Fat Kit

Dates

Publication Date
20260513
Application Date
20211202

Claims (9)

  1. An infusion device (1), the infusion device (1) comprising: a body (10), the body (10) is configured to be able to receive an infusion line (20) and comprises a pumping mechanism (11), wherein the pumping mechanism (11) is configured to enable medical fluid to flow through the infusion line (20) received in the body (10); a pump door assembly (30), wherein the pump door assembly (30) is configured to be connected to the body (10) for closing the body (10) , and is configured to fix the infusion line (20) in place in the body (10), the pump door assembly (30) comprises a buckle part (32), the buckle part (32) comprises: buckle protrusions (33) provided at both ends of the buckle part (32) along a longitudinal direction of the buckle part (32), and top surfaces of the buckle protrusions (33) are shaped to be suitable for receiving the infusion line (20); a groove (34), the groove (34) being located at an intermediate position between the buckle protrusions (33) and configured to be recessed in a height direction of the buckle part (32) to be lower than the buckle protrusions (33), wherein the body (10) further includes two receiving parts (14) the receiving parts are configured to cooperate with the buckle part (32) of the pump door assembly 30 to receive the infusion line (20) mounted in the body (10) and limit the infusion line (20), wherein the body (10) of the infusion device (1) further comprises bubble sensors (12), the bubble sensors (12) are arranged directly below the receiving parts (14) at both sides of the infusion line (20) when the infusion line is received in the body (10), characterized in that the buckle part is configured such that during the process that the infusion line (20) is pressed down by the buckle protrusions (33), an upward arched deformation generated by the infusion line (20) is accommodated in the groove (34) of the buckle part (32).
  2. The infusion device (1) according to claim 1, characterized in that , the buckle part (32) further comprises transition recesses (35) configured to extend between the groove (34) and the buckle protrusions (33) from both sides of both longitudinal ends of the groove (34).
  3. The infusion device (1) according to claim 1, characterized in that , a distance between the bubble sensors (12) is smaller than the diameter of the infusion line (20).
  4. The infusion device (1) according to claim 3, characterized in that , the body (10) comprises a liquid stopper mechanism (13), the liquid stopper mechanism (13) comprises: a clamping valve (131) which can be deformed between a clamping position and a release position, in the clamping position, the clamping valve (131) presses the infusion line (20) passing through the clamping valve (131) to block the flow of medical fluid in the infusion line (20), in the release position, the clamping valve (131) allows the flow of medical fluid through the infusion line (20) , wherein the contour of the upper surface of the clamping valve (131) is a smoothly curved curve; a lever element (132), the level element (132) can be operated to act on the upper surface of the clamping valve (131) for switching the clamping valve (131) between the clamping position and the release position.
  5. The infusion device (1) according to claim 4, characterized in that , the liquid stopper mechanism (13) comprises an infrared recognition assembly, and the infrared recognition assembly comprises: an infrared transmitter (133); an infrared receiver (134); and an infrared light guide (135), the infrared light guide (135) comprises: two light guide posts (136), the two light guide posts (136) are respectively positioned directly above the infrared transmitter (133) and the infrared receiver (134); and a connecting part (137), the connecting part (137) connects the two light guide posts (136).
  6. The infusion device (1) according to claim 5, characterized in that , the connecting part (137) further comprises an anti-light-guiding structure (138) , and the anti-light-guiding structure (138) is configured as two anti-light-guiding grooves formed on two opposite surfaces of the connecting part (137), and the anti-light-guiding grooves extend along a width direction of the connecting part (137) and are staggered with each other, so that the side profile of the anti-light-guiding structure (138) is S-shaped.
  7. The infusion device (1) according to claim 6, characterized in that , the infrared light guide (135) is a single-piece component formed by integral molding.
  8. The infusion device (1) according to claim 1 or 2, characterized in that , the body (10) further comprises a fixing piece (15) for receiving the infusion line (20), and the fixing piece (15) comprises elastic legs (151) at two sides of the fixing piece (15), and when the infusion line (20) is received in the fixing piece (15), the elastic legs (151) are elastically deformed so that the infusion line (20) is clamped in the fixing piece (15).
  9. The infusion device (1) according to claim 8, characterized in that , the bottom part of the fixing piece (15) is configured to have a shape structure matching with the corresponding part of the body (10) for connecting the fixing piece (15), and the fixing piece (15) is connected to the body (10) in a hot melt connection manner.

Description

TECHNICAL FIELD The present application relates to infusion devices for delivering medical fluids such as drugs or nutrient solutions to patients. BACKGROUND Infusion devices, such as volumetric (peristaltic) infusion devices, are used to accurately deliver medical fluids such as drugs or nutrient solutions to patients at a predetermined rate. An infusion line passing through the infusion device is connected at one end to, for example, a container containing liquid medicine, and at the other end to a patient, where a pumping mechanism in the infusion device exerts a pumping force on the infusion line, for example, in a peristaltic manner, so that the liquid medicine is transported toward the patient through the infusion line. Generally, in order to better fix the infusion line in the infusion device, a buckle part for fixing the infusion line in place is provided in the infusion device. However, on the one hand, when the buckle of the buckle part to the infusion line is loose, the infusion line may not be well fixed in the infusion device and the infusion line may not be snugly buckled between the bubble sensors, resulting in false alarm caused by the gap between the bubble sensors. On the other hand, when the buckle part is tightly buckled to the infusion line, although the infusion line may be snugly buckled between the bubble sensors, in this case, the buckle part is easy to block the infusion line, thus affecting the infusion operation. In addition, when arranging the infusion line on the infusion device, it should be avoided that the medical liquid flows through the infusion line in an uncontrolled manner, the so-called free flow state. To this end, the infusion device includes a liquid stopper mechanism that stops the flow through the infusion line before starting the actual infusion operation, so as to be able to perform, for example, an integrity check of the infusion device, especially a so-called OCS (Obstructive Inspection System) test, etc. At the beginning of the infusion operation, the liquid stopper mechanism is opened so that the flow through the infusion line may take place under the control of the pumping mechanism. However, in multiple operations, the traditional liquid stopper mechanism is prone to component wear during the opening and closing process, resulting in deterioration. In addition, when the liquid stopper mechanism is not accurately positioned, it may be difficult for the liquid stopper mechanism to clamp the infusion line, thus causing the medical liquid to flow through the infusion device in an undesired manner. In addition, the traditional infusion device has more connecting parts, which increases the production and assembly cost of the infusion device. Therefore, it is desired to realize a new type of infusion device with an improved design, which may at least eliminate or improve some or all of the above-mentioned problems. An infusion device illustrating the state of the art is known from US 2019/117878 A1. It should be noted that the background technology section is intended to illustrate the technical background of the present application, and is not intended to limit the scope of the present application. It should be noted herein that the technical content provided in this section is intended to help those skilled in the art to understand the present application, and may not necessarily constitute the prior art. SUMMARY The invention comprises an infusion device according to claim 1. Additional features of preferred embodiments of the invention are defined in the dependent claims. A general summary of the present application is provided in this section, rather than the full scope of the present application or a comprehensive disclosure of all features of the present application. An object of the present disclosure is to provide a new type of infusion device, which enables the infusion line be well fixed in place in the infusion device without causing blockage of the infusion line. Another object of the present disclosure is to provide a new type of infusion device, which enables the bubble sensor of the infusion device more accurately detect the bubbles in the infusion line. Another object of the present disclosure is to provide a new type of infusion device whose liquid stopper mechanism is smoother and does not wear out during the opening and closing process. Another object of the present disclosure is to provide a new type of infusion device, which may ensure the accurate positioning of the liquid stopper mechanism. Another object of the present disclosure is to provide a new type of infusion device with a speaker assembly that is easy to mount. According to an aspect of the present disclosure, there is provided an infusion device, where the infusion device includes a body, the body is configured to receive an infusion line and include a pumping mechanism, the pumping mechanism is configured to enable medical fluid to flow through the infusion line received in the