Liquid warming device with basin
First Claim
Patent Images
1. A liquid warming device comprising:
- a cavity with a bottom, the cavity adapted to receive a removable basin, the removable basin having a bottom, a set of at least one side wall connected to the bottom of the basin so that the set of at least one side wall forms a walled perimeter around the bottom of the basin to form a container suitable for holding a fluid, the basin having an integrated hollow protrusion positioned on the exterior of the removable basin and extending from the exterior of the removable basin to the space surrounded by the interior of the removable basin;
a heater adapted to provide heat to the at least a portion of the exterior of the removable basin; and
A control system comprising;
a fluid temperature controller;
a fluid temperature sensor placed such that placement of the removable basin in at least one orientation places a distal end of the fluid temperature sensor into the interior of the integrated hollow protrusion for the purpose of measuring the temperature of a fluid placed in the removable basin, the temperature obtained by the fluid temperature sensor provided as input to the fluid temperature controller;
a heater temperature detector positioned in thermal contact with the heater and providing the heater temperature as input to the fluid temperature controller; and
the fluid temperature controller controlling a flow of electric energy provided to the heater so as to regulate the heater temperature based on the temperature obtained by the fluid temperature sensor.
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Abstract
A liquid warming device for heating sterile fluids in a removable basin is described with emphasis on the properties of the basin interaction with the liquid warming device and with a drape that works with the basin to maintain a sterile field above the drape and the top of the basin. The interactions between a temperature sensor and a temperature well integrated in the removable basin are disclosed. Also disclosed are various desirable aspects for a control system for a liquid warming device are provided.
55 Citations
46 Claims
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1. A liquid warming device comprising:
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a cavity with a bottom, the cavity adapted to receive a removable basin, the removable basin having a bottom, a set of at least one side wall connected to the bottom of the basin so that the set of at least one side wall forms a walled perimeter around the bottom of the basin to form a container suitable for holding a fluid, the basin having an integrated hollow protrusion positioned on the exterior of the removable basin and extending from the exterior of the removable basin to the space surrounded by the interior of the removable basin;
a heater adapted to provide heat to the at least a portion of the exterior of the removable basin; and
A control system comprising;
a fluid temperature controller;
a fluid temperature sensor placed such that placement of the removable basin in at least one orientation places a distal end of the fluid temperature sensor into the interior of the integrated hollow protrusion for the purpose of measuring the temperature of a fluid placed in the removable basin, the temperature obtained by the fluid temperature sensor provided as input to the fluid temperature controller;
a heater temperature detector positioned in thermal contact with the heater and providing the heater temperature as input to the fluid temperature controller; and
the fluid temperature controller controlling a flow of electric energy provided to the heater so as to regulate the heater temperature based on the temperature obtained by the fluid temperature sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A liquid warming device comprising:
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a cavity adapted to receive a removable basin, the removable basin having a bottom, a set of at least one side wall connected to the bottom of the basin so that the set of at least one side wall forms a walled perimeter around the bottom of the basin to form a container suitable for holding a fluid, the basin having an integrated hollow protrusion positioned on the exterior of the removable basin and extending from the exterior of the removable basin to the space surrounded by the walled perimeter of the removable basin;
a fluid temperature sensor placed such that placement of the removable basin in at least one orientation places the fluid temperature sensor into the interior of the integrated hollow protrusion, for the purpose of measuring the temperature of a fluid placed in the removable basin, the temperature obtained by the fluid temperature sensor provided as input to a fluid temperature controller;
a heater adapted to provide heat to the at least a portion of the exterior of the removable basin; and
the fluid temperature controller controlling a flow of energy provided by the heater so as to regulate the temperature obtained by the fluid temperature sensor.
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20. A method of maintaining a liquid near a target temperature using a liquid warming device, comprising the steps of:
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placing a surgical drape with an opening over a cavity in a liquid warming device;
placing a sterile removable basin in the cavity and in contact with the perimeter of the opening in the surgical drape such that a temperature well in the exterior surface of the removable basin is placed over a temperature sensing device, the distal end of the temperature sensing device extending into cavity in the liquid warming device;
placing a sterile liquid in the removable basin;
providing an indication of the temperature sensed by the temperature sensing device to a fluid temperature controller;
while desiring to maintain the sterile fluid near a target temperature iteratively performing;
calculating a temperature difference between a target temperature for the sterile liquid in the removable basin and the temperature sensed by the temperature sensing device and;
establishing a heater set point based on the temperature difference; and
varying the amount of energy provided to the heater as needed to move the measured heater temperature to the heater set point. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A method of maintaining a liquid near a target temperature using a liquid warming device, comprising the steps of:
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placing a surgical drape with an opening over a cavity in a liquid warming device;
placing a sterile removable basin in the cavity and in contact with the perimeter of the opening in the surgical drape such that a temperature well in the exterior surface of the removable basin is placed over a temperature sensing device, the distal end of the temperature sensing device extending into the cavity in the liquid warming device;
placing a sterile liquid in the removable basin; and
controlling the energy provided to the sterile liquid in order to maintain the liquid near the target temperature. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46)
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Specification