Fluid management system with pass-through fluid volume measurement

• US 9,770,541 B2
• Filed: 05/13/2015
• Issued: 09/26/2017
• 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:
  US14/710,810
• Publication Number:
  US 20150328379A1
• Time in Patent Office: 867 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 pressurization device 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 support member for supporting components of the pass-through fluid volume measurement system;

a flow sensing device including;

a disposable or single-use fluid measurement tube having an inlet port in fluid communication with a fluid return line for receiving fluid returning from the surgical site, and an outlet port in fluid communication with a fluid output line for receiving the fluid exiting the fluid measurement tube,

at least one ultrasonic sensor for providing a signal indicative of the flow rate of fluid passing through the fluid measurement tube, and

a clamping mechanism mounted to the support member, said clamping mechanism for temporarily mounting the fluid measurement tube in a proper orientation in relation to the at least one ultrasonic sensor;

a suction source for providing suction in the fluid return line and fluid output line to draw the fluid through the fluid measurement tube and subsequently into a waste collection system; and

a control unit for receiving the signals from the at least one ultrasonic sensor to monitor a volume of fluid returned from the surgical site.

2. The fluid management system of claim 1, wherein said suction source is a component of said fluid volume measurement system.

3. The fluid management system of claim 1, wherein said control unit is a component of said fluid volume measurement system.

4. The fluid management system of claim 1, wherein said fluid measurement tube is re-usable.

5. The fluid management system of claim 1, wherein said pass-through fluid volume measurement system further comprises a temperature sensor for sensing fluid temperature of the fluid in the fluid measurement tube.

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

the flow sensing device;

a first tubing portion providing the fluid input line connected to the inlet port of the flow sensing device; and

a second tubing portion providing the fluid output line connected to the output port of the flow sensing device.

7. The fluid management system of claim 1, wherein said flow sensing device includes a first ultrasonic sensor associated with the inlet port, said first ultrasonic sensor mounted to the support member, and a second ultrasonic sensor associated with the outlet port, said second ultrasonic sensor mounted to the support member, wherein the first and second ultrasonic sensors provide signals indicative of the flow rate of fluid passing through the fluid measurement tube.