Airtrap

• US 7,713,236 B2
• Filed: 04/27/2005
• Issued: 05/11/2010
• Est. Priority Date: 03/17/2005
• Status: Active Grant

• Current Assignee: Smisson-Cartledge Biomedical LLC
• Original Assignee: Smisson-Cartledge Biomedical LLC
• Inventors: Koltz, Michael L., Iaconis, John M., Cartledge, Richard G., Smisson, Hugh F. III, Rainier, Bradford J.
• Primary Examiner(s): Lucchesi; Nicholas D
• Assistant Examiner(s): Eisenberg; Rebecca E
• Application Number:
  US11/115,452
• Publication Number:
  US 20060211986A1
• Time in Patent Office: 1,840 Days
• Field of Search: 604/31, 604 65- 67, 604/113, 604122-124, 604128-129, 604/133
• US Class Current: 604/122
• CPC Class Codes: A61M 1/0281 Apparatus for treatment of blood or blood constituents prior to transfusion, e.g. washing, filtering or thawing
• CPC Class Codes: A61M 2205/127 with provisions for heating or cooling
• CPC Class Codes: A61M 2206/10 Flow characteristics
• CPC Class Codes: A61M 2206/14 Static flow deviators in tubes disturbing laminar flow in tubes, e.g. archimedes screws
• CPC Class Codes: A61M 5/16831 Monitoring, detecting, signalling or eliminating infusion flow anomalies low-level float-valves causing cut-off A61M5/40; indicating or recording presence, absence or direction of flow in general G01P13/0066
• CPC Class Codes: A61M 5/172 electrical or electronic A61M5/16804, A61M5/16831 take precedence
• 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 5/365 Air detectors A61M5/1684 takes precedence; in extracorporeal blood circuits A61M1/3626
• CPC Class Codes: A61M 5/44 having means for cooling or heating the devices or media

Abstract

The present invention relates to a system for increasing the temperature of a fluid being infused into a patient'"'"'s body while the infusion is taking place. The present invention also provides for improved monitoring of air in the infusion system such to prevent the introduction of air into the patient'"'"'s body receiving the fluid infusion. The present invention also provides for a system pump which provides a variable flow rate that serves a vast amount of infusion needs and purposes. A disposable cartridge in accordance with the present invention will allow for the efficient transfer of heat energy to the fluid being infused into the patient'"'"'s body. The cartridge will further ensure that deleterious amounts of air will not be introduced into the patient'"'"'s body.

Claims

1. An air-trap comprising upper and lower aspects defining a longitudinal axis extending centrally therebetween, an upper fluid input port formed in an exterior side wall of the air-trap in the upper aspect, wherein fluid enters the air-trap from the upper fluid input port at an axis orthogonal to the longitudinal axis, a lower fluid output port positioned off center from the longitudinal axis, a lower fluid flow disrupter positioned off-center from the longitudinal axis, proximate the lower fluid output port, and between the longitudinal axis and the lower fluid output port, and an upper air output port, wherein either the lower fluid output port or the upper air output port is selectively open in operation.

2. The air-trap of claim 1 wherein the air-trap is taller than wide.

3. The air-trap of claim 1 further comprising an ultrasonic detection mechanism to monitor fluid volume in the air-trap.

4. The air-trap of claim 1 further comprising a valve at the fluid output port and a valve at the air output port working in tandem to force air out the air output port as the volume of the fluid within the air-trap increases, to a pre-determined level.

5. The air-trap of claim 1 wherein the air-trap effectively removes air when moved off vertical axis up to 45°

.

6. The air-trap of claim 1, wherein the upper fluid port is operable to introduce fluid into the air-trap to permit a circular flow of the fluid.

7. The air-trap of claim 1, wherein the upper fluid port is operable to introduce fluid into the air-trap to permit a circular flow of the fluid, and wherein the circular flow of the fluid at the fluid flow disrupter is disrupted to create a pressure differential proximate the lower fluid output port to draw the fluid into the lower fluid output port.

8. The air-trap of claim 1, wherein the upper fluid input port is oriented to direct fluid into the air-trap in a direction off of the longitudinal axis.

9. The air-trap of claim 1, wherein the longitudinal axis is a first longitudinal axis, and wherein the lower fluid flow disrupter is positioned between the first longitudinal axis and a second longitudinal axis parallel to the first longitudinal axis and extending through the fluid output port.

10. A cylindrical air-trap for removing air from fluid comprising an upper and lower aspect defining a longitudinal axis extending centrally therebetween, an upper fluid input port formed in an exterior side wall of the air-trap in the upper aspect, wherein fluid enters the air-trap from the upper fluid input port at an axis orthogonal to the longitudinal axis, a lower fluid output port positioned off-center from the longitudinal axis, an upper air output port, and a fluid flow disrupter positioned off center from the longitudinal axis, proximate the lower fluid output port, and between the center of the longitudinal axis and the lower fluid output port, wherein the air-trap creates a vortex of fluid introduced via the fluid input port and the fluid flow disrupter creates a pressure differential at the fluid output port for drawing fluid into the lower fluid output port.

11. The air-trap of claim 10 wherein the fluid flow disrupter extends from the inner surface of the lower aspect of the air-trap.

12. The air-trap of claim 10 further comprising an ultrasonic detection mechanism to monitor fluid height.

13. The air-trap of claim 10 further comprising a valve at the fluid output port and a valve at the air output port working in tandem to force air out the air output port as the volume of the fluid within the air-trap increases.

14. The air-trap of claim 10 wherein the air-trap effectively removes air when moved off vertical axis up to 45°

.

15. The air-trap of claim 10, wherein the upper fluid port is operable to introduce fluid into the air-trap to create the vortex fluid.

16. The air-trap of claim 10, wherein the upper fluid input port is oriented to direct fluid into the air-trap in a direction off of the longitudinal axis.

17. The air-trap of claim 10, wherein the longitudinal axis is a first longitudinal axis, and wherein the fluid flow disrupter is positioned between the first longitudinal axis and a second longitudinal axis parallel to the first longitudinal axis and extending through the fluid output port.

18. An air-trap comprising upper and lower aspects defining a longitudinal axis extending centrally therebetween, an upper fluid input port formed in an exterior side wall of the air-trap, wherein fluid enters the air-trap from the upper fluid input port at an axis orthogonal to the longitudinal axis, a lower fluid output port positioned off-center from the longitudinal axis, a fluid flow disrupter positioned off-center from the longitudinal axis, proximate the lower fluid output port, and between the longitudinal axis and the lower fluid output port, and an upper air output port.