Apparatus and method for infusing fluid through a tube by appropriately heating the tube

{
  "publication_number": "US11672903B2",
  "country": "US",
  "kind": "B2",
  "title": "Apparatus and method for infusing fluid through a tube by appropriately heating the tube",
  "abstract": "A peristaltic pump disclosed herein includes a raceway, a plunger, a motor, and a heater. The raceway is configured to retain a tube (e.g., an IV tube). The plunger acts on the tube disposed within the raceway. The motor engages the plunger to actuate the plunger. The heater is disposed in thermal-conductive contact with the tube. That is, the heater, either through direct or indirect application, heats the tube.",
  "claims": [
    "1. A peristaltic pump, comprising: a raceway configured to retain a tube; a plunger configured to act on the tube disposed within the raceway; a heater configured to heat the tube; a heater controller configured to control heating of the heater; and a temperature sensor configured to sense heat generated by the heater, wherein the heater controller is configured to control the heater to achieve a target temperature when the peristaltic pump cannot achieve a target flow rate without activating the heater.",
    "2. A peristaltic pump, comprising: a plunger configured to act on a tube; a heater configured to heat the tube; and a controller configured to heat the heater to a predetermined temperature, wherein the predetermined temperature is selected to achieve a predetermined maximum flow error rate of the controller when controlling actuation of the plunger to move fluid through the tube.",
    "3. The peristaltic pump according to claim 2, wherein the predetermined temperature is selected based upon a material of the tube.",
    "4. A peristaltic pump, comprising: a plunger configured to act on a tube; a heater configured to heat the tube; and a controller configured to heat the heater to a predetermined temperature, wherein the predetermined temperature is selected in accordance with a plurality of tube types, and wherein each tube type of the plurality of tube types affects an error flow rate depending upon the predetermined temperature.",
    "5. The peristaltic pump according to claim 4, wherein the predetermined temperature is selected to minimize a maximum error flow rate of all of the plurality of tube types.",
    "6. The peristaltic pump according to claim 5, wherein the plunger is a spring-biased plunger configured to use a spring to urge a volume of fluid to be discharged by the plunger, wherein a delta movement of the plunger from a full fill volume to a full discharge volume is correlated to a fluid discharge volume.",
    "7. The peristaltic pump according to claim 6, wherein the correlation between the delta movement of the plunger to the fluid discharge volume corresponds to the predetermined temperature selected to minimize the maximum error flow rate of all of the plurality of tube types.",
    "8. The peristaltic pump according to claim 4, wherein a tube type of the plurality of tube types is defined as a function of a material of a wall of a respective tube of the plurality of tube types.",
    "9. A peristaltic pump, comprising: a plunger configured to act on a tube; and a heater configured to heat the tube, wherein: the plunger is a spring-biased plunger configured to use a spring to urge a volume of fluid to be discharged by the plunger, wherein a delta movement of the plunger from a full fill volume to a full discharge volume is correlated to an estimated fluid discharge volume, and the correlation is determined using a linear equation having at least one parameter.",
    "10. The peristaltic pump according to claim 9, wherein a parameter of the at least one parameter is increased or decreased in accordance with an increase or decrease of a target temperature.",
    "11. The peristaltic pump according to claim 9, wherein a target temperature is configured to minimize a maximum error flow rate for a plurality of tube types, the tube being a tube type of the plurality of tube types.",
    "12. The peristaltic pump according to claim 11, wherein the target temperature is selected to minimize the maximum error flow rate for the plurality of tube types when using fixed parameters of the at least one parameter of the linear equation.",
    "13. The peristaltic pump according to claim 9, wherein the linear equation is ax+b=y, where x is the delta movement of the plunger and y is the estimated fluid discharge volume, wherein the at least one parameter include the a and b of the linear equation."
  ],
  "description_excerpt": "The present disclosure relates to infusing fluid. More particularly, the present disclosure relates to an apparatus for infusing fluid into a patient, e.g., using a pump.\n\nProviding patient care in a hospital generally necessitates the interaction of numerous professionals and caregivers (e.g., doctors, nurses, pharmacists, technicians, nurse practitioners, etc.) and any number of medical devices/systems needed for treatment of a given patient. Despite the existence of systems intended to facilitate the care process, such as those incorporating electronic medical records (“EMR”) and computerized provider order entry (“CPOE”), the process of providing comprehensive care to patients including ordering and delivering medical treatments, such as medications, is associated with a number of non-trivial issues.\n\nPeristaltic pumps are used in a variety of applications such as medical applications, especially fluid transfer applications that would benefit from isolation of fluid from the system and other fluids. Some peristaltic pumps work by compressing or squeezing a length of flexible tubing. A mechanical mechanism pinches a portion of the tubing and pushes any fluid trapped in the tubing in the direction of rotation. There are rotary peristaltic pumps and finger peristaltic pumps.\n\nRotary peristaltic pumps typically move liquids through flexible tubing placed in an arc-shaped raceway. Rotary peristaltic pumps are generally made of two to four rollers placed on a roller carrier driven rotationally by a motor.",
  "cpc": [
    "A61M 5/14228",
    "A61M 2205/3334",
    "A61M 2205/3368",
    "A61M 5/44",
    "F04B 43/0072",
    "F04B 43/0081",
    "F04B 43/1223",
    "F04B 53/08",
    "F04B 53/16"
  ],
  "ipc": [
    "A61M 5/142",
    "A61M 5/44",
    "F04B 43/00",
    "F04B 43/12",
    "F04B 53/08",
    "F04B 53/16"
  ],
  "assignees": [
    "Deka Products LP"
  ],
  "inventors": [
    "John J. Biasi",
    "Larry B. Gray",
    "Daniel F. Pawlowski"
  ],
  "filing_date": "2019-04-08",
  "publication_date": "2023-06-13",
  "grant_date": "2023-06-13",
  "priority_date": "2014-09-18",
  "application_number": "US-201916377453-A",
  "family_id": "54207770",
  "cited_by_count": 5,
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