Fluid management system with pass-through fluid volume measurement

• US 10,518,005 B2
• Filed: 09/18/2017
• Issued: 12/31/2019
• Est. Priority Date: 05/15/2014
• Status: Active Grant

• Current Assignee: Stryker Corporation
• Original Assignee: Thermedx, LLC (Stryker Corporation)
• Inventors: Carr, Douglas L., Patel, Nilesh R.
• Primary Examiner(s): Vu, Quynh-Nhu H.
• Application Number:
  US15/706,822
• Publication Number:
  US 20180000998A1
• Time in Patent Office: 834 Days
• CPC Class Codes: A61M 1/631 Emptying the suction container without interrupting suction
• CPC Class Codes: A61M 1/777 Determination of loss or gain of body fluids due to suction-irrigation, e.g. during surgery
• CPC Class Codes: A61M 1/80 Suction pumps A61M1/64, A61M1/71, A61M60/00 take precedence
• CPC Class Codes: A61M 2202/0007 introduced into the body
• CPC Class Codes: A61M 2202/0014 removed from the body
• CPC Class Codes: A61M 2205/3368 Temperature
• CPC Class Codes: A61M 2205/3372 Temperature compensation
• CPC Class Codes: A61M 2205/3393 by weighing the reservoir
• CPC Class Codes: A61M 2205/3396 Reservoirs being alternately filled and emptied for measuring flow rate or delivered volume
• CPC Class Codes: A61M 2205/36 related to heating or cooling
• CPC Class Codes: A61M 2205/7536 allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes

Abstract

A fluid management system including a pass-through fluid volume measurement system to provide continuous measurement of fluid returned from a surgical site during transit to a waste collection system. The pass-through fluid volume measurement system eliminates the need to physically replace full fluid collection containers during the medical procedure with new, empty fluid collection containers.

Claims

1. A fluid management system comprising:

at least one fluid supply container for storing a fluid to be delivered to a surgical site;

a fluid supply line for delivering the fluid from the at least one fluid supply container to the surgical site; and

a pass-through fluid volume measurement system for determining the volume of fluid returned from the surgical site, said pass-through fluid volume measurement system comprising;

a plurality of fluid collection containers, wherein each fluid collection container has (i) a suction input in fluid communication with a suction line, for drawing a vacuum in the fluid collection container, (ii) a fluid input in fluid communication with a fluid return line for receiving fluid returning from the surgical site, and (iii) a fluid output in fluid communication with a fluid output line for evacuating the fluid collected in the fluid collection container to a waste collection system;

one or more sensors for providing signals indicative of an amount of fluid in the fluid collection containers; and

a plurality of valves moveable between open and closed positions to control the flow of fluid through the suction line, the fluid return line and the fluid output line;

one or more suction sources for providing suction in the suction line to draw a vacuum in the fluid collection containers to thereby draw fluid from the surgical site into the fluid collection containers, and for providing suction in the fluid output line to draw fluid collected in the fluid collection containers into the waste collection system; and

a control unit for receiving the signals from the one or more sensors to monitor a volume of fluid returned from the surgical site to the fluid collection containers, and moving the plurality of valves between the open and the closed positions to alternately fill one of the fluid collection containers while emptying another of the fluid collection containers.

2. The fluid management system according to claim 1, wherein said one or more sensors are optical sensors, weight sensors, or load cells.

3. The fluid management system according to claim 1, wherein said control unit continuously monitors the volume of fluid delivered to and returned from the surgical site to continuously determine a fluid deficit between the amount of fluid delivered to the surgical site and the amount of fluid returned from the surgical site to the fluid collection containers.

4. The fluid management system of claim 1, wherein the waste collection system is one of the following:

a mobile fluid collection container or cart, dedicated stand-alone fluid collection system with integrated suction, or a hospital waste disposal system.

5. The fluid management system of claim 1, wherein the pass-through fluid volume measurement system further comprises:

fluid level sensors for detecting whether a fluid level of one of the fluid collection containers has reached a predetermined fluid level.

6. The fluid management system of claim 1, wherein the system includes a tubing set comprised of:

the plurality of fluid collection containers;

a first tubing portion providing the suction line connected to the suction input of each of the fluid collection containers;

a second tubing portion providing the fluid input line connected to the fluid input of each of the fluid collection containers; and

a third tubing portion providing the fluid output line connected to the fluid output of each of the fluid collection containers.

7. The fluid management system of claim 6, wherein the tubing set further comprises a tissue collection trap.

8. The fluid management system of claim 7, wherein the tissue collection trap is located in the second tubing portion.

9. The fluid management system of claim 6, wherein each of the first, second and third tubing portions has an associated strain relief element.

10. The fluid management system of claim 6, wherein the tubing set further comprises a hydrophobic filter in the first tubing portion to prevent fluid from flowing toward the suction source in the suction line.

11. The fluid management system of claim 6, wherein the tubing set further comprises a check valve in the second tubing portion to prevent fluid from back flowing to the surgical site.

12. The fluid management system according to claim 1, wherein said suction source is a component of the pass-through volume measurement system.

13. The fluid management system according to claim 1, wherein said fluid collection containers are re-usable.

14. The fluid management system according to claim 1, wherein said suction source is located external to the pass-through volume measurement system.

15. The fluid management system according to claim 14, wherein said suction source is a component of the waste collection system.

16. The fluid management system according to claim 1, wherein said suction source is one of the following:

a vacuum pump, a peristaltic pump, rotary vane pump, gerotor pump, or a piston pump.

17. The fluid management system according to claim 1, wherein the plurality of valves are pinch valves.

18. The fluid management system according to claim 1, wherein said control unit is a component of the pass-through volume measurement system.

19. The fluid management system of claim 1, wherein the pass-through fluid volume measurement system further comprises:

at least one leak sensor for detecting the presence of a fluid leak in at least one of the following;

the fluid collection containers, the fluid return line, and the fluid output line.

20. The fluid management system of claim 1, wherein the at least one fluid supply container and the pump are components of a fluid management unit, said pass-through volume measurement system including a communications interface for communicating with a control unit of the fluid management unit via wired or wireless communications.