Intravenous fluid warming system
First Claim
Patent Images
1. A fluid warming system to minimize heat loss through IV tubing to a patient, comprising:
- a) determining a temperature drop across a heat exchange body of an IV fluid warming device;
b) determining a temperature drop of the IV tubing to the environment, the IV tubing extending from the IV fluid warming device to a patient;
c) determining if the temperature drop along the IV tubing is greater than a determined temperature limit;
d) determining if the total temperature drop along the IV tubing and across the heat exchange body is greater than a determined drop limit;
e) if the determined values from step c) and step d) are greater than their respective limits, determining the actual fluid temperature as a fluid output temperature minus the drop limit;
f) if either of the determined values from step c) and step d) are not greater than their respective limits, determining the actual fluid temperature as a fluid output temperature minus the heat exchanger temperature drop; and
g) adjusting power to the heat exchanger to achieve the desired output temperature.
15 Assignments
0 Petitions
Accused Products
Abstract
A fluid warming device includes axially or longitudinally slidable covers that retain a removable heat exchange body in a housing in heat exchange communication with a heater assembly while allowing flow through the heat exchange body to be observed. In another aspect, a fluid warming system increases or decreases power to a heater assembly to adjust the fluid temperature to ensure that the fluid is at an appropriate temperature when it reaches the patient.
27 Citations
14 Claims
-
1. A fluid warming system to minimize heat loss through IV tubing to a patient, comprising:
-
a) determining a temperature drop across a heat exchange body of an IV fluid warming device; b) determining a temperature drop of the IV tubing to the environment, the IV tubing extending from the IV fluid warming device to a patient; c) determining if the temperature drop along the IV tubing is greater than a determined temperature limit; d) determining if the total temperature drop along the IV tubing and across the heat exchange body is greater than a determined drop limit; e) if the determined values from step c) and step d) are greater than their respective limits, determining the actual fluid temperature as a fluid output temperature minus the drop limit; f) if either of the determined values from step c) and step d) are not greater than their respective limits, determining the actual fluid temperature as a fluid output temperature minus the heat exchanger temperature drop; and g) adjusting power to the heat exchanger to achieve the desired output temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A fluid warming system to minimize heat loss through IV tubing to a patient, comprising:
-
a) determining a temperature drop across a heat exchange body of an IV fluid warming device, the heat exchange body comprising a fluid input port, a fluid output port, and a fluid flow path from the fluid input port to the fluid output port, wherein the fluid input port is connected to an IV fluid line to receive a fluid and the fluid output port is connected to the IV tubing to deliver the fluid through the IV tubing to a patient; b) determining a temperature drop of the IV tubing to the environment, the IV tubing extending from the IV fluid warming device to the patient; c) determining if the temperature drop along the IV tubing is greater than a determined temperature limit; d) determining if the total temperature drop along the IV tubing and across the heat exchange body is greater than a determined drop limit; e) if the determined values from step c) and step d) are greater than their respective limits, determining the actual fluid temperature as a fluid output temperature minus the drop limit; f) if either of the determined values from step c) and step d) are not greater than their respective limits, determining the actual fluid temperature as a fluid output temperature minus the heat exchanger temperature drop; and g) adjusting power provided to a heater assembly disposed in heat exchange communication with the heat exchange body to achieve the desired output temperature. - View Dependent Claims (14)
-
Specification