Slack-time heating system for blood and fluid warming

• US 10,137,257 B2
• Filed: 11/30/2016
• Issued: 11/27/2018
• Est. Priority Date: 11/30/2016
• Status: Active Grant

• Current Assignee: Belmont Instrument, LLC
• Original Assignee: Belmont Instrument, LLC
• Inventors: Landy, III, John J., Tseng, Yeu Wen
• Primary Examiner(s): MENDEZ, MANUEL A
• Application Number:
  US15/364,515
• Publication Number:
  US 20180147370A1
• Time in Patent Office: 727 Days
• Field of Search: 604113, 604114
• CPC Class Codes: A61F 2007/0059 with an open fluid circuit
• CPC Class Codes: A61F 2007/0072 remote from the spot to be heated
• CPC Class Codes: A61F 2007/126 for invasive application, e.g. for introducing into blood vessels
• CPC Class Codes: A61F 7/00 Heating or cooling appliances for medical or therapeutic treatment of the human body heating or cooling means in connection with bedsteads or mattresses A47C21/00 ; massage, therapeutic baths A61H; hyperthermia using electric or magnetic fields or ultrasound A61N; electric heating elements H05B
• CPC Class Codes: A61F 7/007 characterised by electric heating
• CPC Class Codes: A61F 7/0085 Devices for generating hot or cold treatment fluids
• CPC Class Codes: A61F 7/12 Devices for heating or cooling internal body cavities
• CPC Class Codes: A61M 2205/3368 Temperature
• CPC Class Codes: A61M 2205/3653 by Joule effect, i.e. electric resistance
• CPC Class Codes: A61M 5/36 with means for eliminating or preventing injection or infusion of air into body dialysis systems, blood oxygenators A61M1/14; haemofiltration equipment A61M1/34; automatic tube cut-off A61M39/281
• CPC Class Codes: A61M 5/44 having means for cooling or heating the devices or media
• CPC Class Codes: A61M 5/445 the media being heated in the reservoir, e.g. warming bloodbags

Abstract

Presented herein are various systems, methods, and apparatuses for heating infusate by an induction heater e.g., an electromagnetic heater, and storing thermal energy in a reservoir of thusly heated infusate. In certain embodiments, a system includes a reservoir for containing an infusate, a fluid heater, a diversion valve, a patient line, and a recirculation line.

Claims

1. A system for heating an infusate, the system comprising:

a reservoir for containing an infusate;

an induction fluid heater comprising a circular single flow path therewithin;

a diversion valve;

a patient line; and

a recirculation line,

wherein the induction fluid heater comprises an inlet to receive the infusate from the reservoir and to direct the infusate to the circular single flow path,

wherein the induction fluid heater comprises an outlet to direct a heated infusate from the circular single flow path into the patient line and/or the recirculation line,

wherein the diversion valve operates to direct the heated infusate from the induction fluid heater into the patient line and/or the recirculation line, said diversion valve controlling a ratio of a flow in the patient line to a flow in the recirculation line,

wherein the patient line directs the heated infusate to a patient, and

wherein the recirculation line directs the heated infusate to the reservoir, so that the system increases a temperature of the infusate in the reservoir.

2. The system of claim 1, wherein the induction fluid heater receives electric power via an AC wall outlet or a battery.

3. The system of claim 1, further comprising a bubble trap for removing air bubbles from the infusate flowing through the system.

4. The system of claim 1, further comprising one or more temperature detectors positioned for simultaneous detection of one or more temperature of the infusate.

5. A method for heating an infusate, the method comprising:

heating an inlet infusate via an induction fluid heater comprising a circular single flow path therewithin, wherein the induction fluid heater comprises an inlet to receive the inlet infusate from a reservoir and to direct the inlet infusate to the circular single flow path, and the induction fluid heater comprises an outlet to receive an outlet infusate from the circular single flow path;

directing the outlet infusate into a patient line and/or a recirculation line, the outlet infusate flowing from the outlet of the induction fluid heater;

providing the outlet infusate to a patient though the patient line when the outlet infusate is directed therethrough, and

directing the outlet infusate to the reservoir though the recirculation line when the outlet infusate is directed therethrough, thereby providing heat to the infusate contained in the reservoir.

6. The method of claim 5, wherein temperature of the outlet infusate is higher than a temperature of the inlet infusate.

7. The method of claim 5, further comprising measuring a temperature of the inlet infusate, the inlet infusate flowing to the induction fluid heater from the reservoir.

8. The method of claim 5, further comprising mixing the infusate from the recirculation line and the infusate stored in the reservoir.

9. The method of claim 5, further comprising controlling a ratio of a flow in the patient line to a flow in the recirculation line.