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CN-116899049-B - Flow controller for intravenous tubing and intravenous set

CN116899049BCN 116899049 BCN116899049 BCN 116899049BCN-116899049-B

Abstract

The present application relates to a flow controller for an intravenous tube. The flow controller may include first and second structural members defining a cavity therebetween for a portion of the tube, wherein the first structural member is linearly slidable along a length of the tube to compress at least a portion of the tube to control the flow of medical fluid through the tube. The flow controller may include a first ramp wedge structure, a second ramp wedge structure configured to slide over the first ramp wedge structure to compress a portion of the iv tube disposed between the first ramp wedge structure and the second ramp wedge structure, a yoke having a linear slot, a wheel having a pin radially separated from a center of the wheel and slidably disposed in the linear slot, and a transition structure coupled to the yoke and the first ramp wedge structure. The application also relates to an intravenous set comprising a flow controller.

Inventors

  • Su .pake
  • Janice Parker
  • Wesley Underwood
  • Sidas K. sevgul

Assignees

  • 康尔福盛303公司

Dates

Publication Date
20260512
Application Date
20190320
Priority Date
20180321

Claims (16)

  1. 1. A flow controller for an intravenous tube, the flow controller comprising: a first structural member comprising a first outer surface and a first inner surface disposed at an angle relative to the first outer surface; a second structural member including a second outer surface parallel to the first outer surface and a second continuous inner surface parallel to the first inner surface, and A third structural member disposed on one of the first or second structural members, the third structural member including a friction reducing surface for at least a portion of a cavity disposed between the first and second structural members, Wherein the first structural member is linearly slidable along a length of an intravenous tube disposed in the cavity to compress a portion of the intravenous tube to control a flow of medical fluid through the intravenous tube, Wherein the flow controller further comprises a rotation control member coupled to the first structural member such that rotation of the rotation control member causes the first structural member to slide linearly over the second structural member, and Wherein the rotation control member includes a wheel for a scotch yoke mechanism coupled to the first structural member.
  2. 2. The flow controller of claim 1, wherein the first interior surface defines a portion of the cavity on a first side of an intravenous tube and the second continuous interior surface defines a portion of the cavity on a second side of an intravenous tube.
  3. 3. The flow controller of claim 1, wherein the first inner surface is a ramped first surface and the second continuous inner surface is a ramped second surface, and wherein the ramped first surface is parallel to the ramped second surface at all positions of the linearly slidable first structural member relative to the second structural member.
  4. 4. The flow controller of claim 3, wherein the linearly slidable first structural member has an open position in which the intravenous tube is uncompressed within the cavity and a closed position that is linearly separated from the open position, wherein the portion of the intravenous tube is compressed between a ramped first surface and a ramped second surface to inhibit a flow of medical fluid through the intravenous tube.
  5. 5. The flow controller of claim 3, wherein the linearly slidable first structural member is continuously slidable between an open uncompressed position and a closed compressed position, and wherein each intermediate position of the linearly slidable first structural member between an open position and a closed position is associated with intermediate compression of the portion of the intravenous tube between the ramped first surface and the ramped second surface to set a corresponding intermediate flow rate through the intravenous tube.
  6. 6. The flow controller of claim 1, wherein the linearly slidable first structural member is configured to slide along a track relative to the second structural member in response to pressure from a user's finger on an outer surface of the first structural member, wherein the engagement portion of both the first and second structural members are mounted to the track.
  7. 7. The flow controller of claim 1, wherein the wheel for the scotch yoke mechanism comprises a first wheel for the scotch yoke mechanism and having a first diameter, and wherein the flow controller further comprises a second wheel having a second diameter that is greater than the first diameter to provide overall and fine linear control of the position of the first structural member.
  8. 8. The flow controller of claim 7, further comprising an additional rotary actuator coupled to the first structural member.
  9. 9. The flow controller of claim 1 further comprising a hard stop implemented with complementary structures on the first and second structural members that interact with each other to indicate and maintain the first structural member in the closed position.
  10. 10. The flow controller of claim 9 wherein the hard stop comprises a protrusion on one of the first and second structural members and a corresponding recess on the other of the first and second structural members.
  11. 11. The flow controller of claim 1, further comprising a friction increasing feature disposed on the other of the first or second structural member.
  12. 12. A flow controller for an intravenous tube, the flow controller comprising: a first sloped wedge structure having a first inner surface and a first outer surface; A second ramp-wedge structure having a continuous second inner surface parallel to the first inner surface and a second outer surface parallel to the first outer surface, the second ramp-wedge structure being configured to slide relative to the first ramp-wedge structure to compress a portion of the intravenous tube disposed in a cavity between the first and second ramp-wedge structures, and A structural member including a friction reducing surface for at least a portion of the cavity, Wherein the flow controller further comprises: a yoke having a linear groove; A wheel having a pin radially separated from a center of the wheel and slidably disposed in the linear groove, and A transition structure coupled to the yoke and the first ramp wedge structure, Wherein the yoke is configured to convert rotation of the wheel into linear actuation of the conversion structure to linearly slide the second ramp wedge structure over the first ramp wedge structure.
  13. 13. The flow controller of claim 12, wherein the first inner surface is a first sloped surface, wherein the second inner surface is a second sloped surface parallel to the first sloped surface, and wherein a distance between the first sloped surface and the second sloped surface is controllable by linear sliding of a second sloped wedge structure to controllably compress the portion of the intravenous tube.
  14. 14. The flow controller of claim 12, further comprising a hard stop feature on the first ramp wedge structure that limits movement of the second ramp wedge structure.
  15. 15. The flow controller of claim 12, further comprising an interlocking interface between the first ramp wedge structure and the second ramp wedge structure.
  16. 16. An intravenous injection kit comprising: intravenous tube, and A flow controller coupled to the intravenous tube, the flow controller being as claimed in any one of claims 1 to 15.

Description

Flow controller for intravenous tubing and intravenous set The present application is a divisional application of the application application of the application number 201980020645.2, entitled "Linear actuated flow controller for intravenous fluid administration", having the application date 2019, 3, 20. Technical Field The present disclosure relates generally to Intravenous (IV) fluid administration, and in particular to a linearly actuated flow controller and an intravenous set for IV fluid administration. Background Intravenous (IV) administration sets (sometimes referred to simply as IV sets) for infusing medical fluids typically comprise an IV tube for coupling a medical fluid container, such as an IV bag, to a patient interface, such as a catheter assembly for a patient. In some cases, gravity infusion of medical fluids uses gravity rather than an infusion pump to deliver the medical fluid through the IV set. Control of the flow through the tube is typically provided by roller jaws on the IV tube. However, it may be difficult to use roller jaws to provide the desired flow rate. Disclosure of Invention One or more embodiments of the present disclosure provide a flow controller for an Intravenous (IV) tubing. The flow controller may include first and second structural members defining a cavity therebetween for a portion of the tube, wherein the first structural member is linearly slidable along a length of the tube to compress at least a portion of the tube to control the flow of medical fluid through the tube. One or more embodiments of the present disclosure provide a flow controller for an Intravenous (IV) tubing. The flow controller may include a first ramp wedge structure, a second ramp wedge structure configured to slide over the first ramp wedge structure to compress a portion of the iv tube disposed between the first ramp wedge structure and the second ramp wedge structure, a yoke having a linear slot, a wheel having a pin radially separated from a center of the wheel and slidably disposed in the linear slot, and a transition structure coupled to the yoke and the first ramp wedge structure. One or more embodiments of the present disclosure provide an Intravenous (IV) set. The IV set may include a flow controller configured to be coupled to a medical tube. The flow controller may include first and second structural members defining a cavity therebetween for receiving a portion of a medical tube, wherein the first structural member is linearly slidable relative to the second structural member in a direction non-perpendicular to the second structural member, and wherein the cavity decreases in size as the first structural member slides relative to the second structural member. It is understood that other constructions of the present technology will become readily apparent to those skilled in the art from the following detailed description, wherein various constructions of the present technology are shown and described by way of illustration. As will be realized, the technology is capable of other and different constructions and its several details are capable of modification in various other respects, all without departing from the scope of the present technology. Accordingly, the drawings and detailed description are to be regarded as illustrative in nature and not as restrictive. Drawings The accompanying drawings, which are included to provide a further understanding and are incorporated in and constitute a part of this specification, illustrate disclosed embodiments and together with the description serve to explain the principles of the disclosed embodiments. In the accompanying drawings: Fig. 1 is a schematic diagram of an Intravenous (IV) set having a flow controller according to certain aspects of the present disclosure. Fig. 2 illustrates a schematic cross-sectional view of a flow controller in an open configuration in accordance with certain aspects of the present disclosure. Fig. 3 illustrates a schematic cross-sectional view of the flow controller of fig. 2 in a closed configuration in accordance with certain aspects of the present disclosure. Fig. 4 illustrates a schematic cross-sectional front view of a flow controller in accordance with certain aspects of the present disclosure. Fig. 5 illustrates a schematic cross-sectional view of a flow controller having a switching mechanism in accordance with certain aspects of the present disclosure. Fig. 6 illustrates a schematic cross-sectional view of the flow controller of fig. 3 with an alternative hard stop configuration in accordance with certain aspects of the present disclosure. Detailed Description The detailed description set forth below describes various configurations of the present technology and is not intended to represent the only configurations in which the present technology may be implemented. The detailed description includes specific details for the purpose of providing a thorough understanding of the present technology. A