Granted Patent B2

US 12,558,474 · App. 18/036,335 · Granted Feb 24, 2026

Inventors: Jason Jishen Cheng (Avondale Estates, GA); David M. Simiele (Roswell, GA)

Assignee: C. R. Bard, Inc.

A61M1/85A61M25/0017A61M2039/226A61M2202/0496A61M2205/3331A61M2205/50G16H40/63

Abstract

Claims (37)

1 . A drainage system configured to drain a fluid from a body of a patient, the drainage system comprising:

a drainage tube defining a drainage lumen and configured to provide fluid communication between a catheter and a collection container;

a connector providing pressurized air to the drainage lumen, the connector disposed proximate the catheter;

a sensor disposed within the drainage lumen; and

a controller including logic and configured to:

i) determine a state of a drainage fluid disposed within the drainage lumen by measuring a pressure within the drainage lumen and calculating a noise level;

ii) modify a pressure level of the pressurized air provided by the connector; and

iii) determine if the drainage lumen is clear of the drainage fluid.

2 . The drainage system according to claim 1 , further including one or more solenoid valves communicatively coupled to the controller and configured to control one of a fluid communication between the catheter and the drainage lumen, or a fluid communication between the connector and the drainage lumen.

3 . The drainage system according to claim 2 , wherein the one or more solenoid valves configured to control the fluid communication between the connector and the drainage lumen modifies the pressure level of pressurized air between 0% and 100%.

4 . The drainage system according to claim 2 , wherein the one or more solenoid valves configured to control the fluid communication between the connector and the drainage lumen modifies the pressure level of pressurized air between a first pressurized air source and a second pressurized air source.

5 . The drainage system according to claim 1 , wherein the sensor is configured to detect one of an air pressure within the drainage lumen, or the state of the drainage fluid within the drainage lumen.

6 . The drainage system according to claim 1 , wherein the state of the drainage fluid includes one of a columnized fluid state, a mixed fluid state, or a no drainage fluid state.

7 . The drainage system according to claim 1 , wherein measuring the pressure within the drainage lumen includes measuring one of an absolute pressure value or a percentage change of the pressure within the drainage lumen.

8 . The drainage system according to claim 7 , wherein the percentage change of pressure is calculated by determining a moving average value for a plurality of absolute pressure values over time.

9 . The drainage system according to claim 1 , wherein a high noise level indicates a mixed fluid state and a low noise level with a pressure spike indicates a columnized fluid state.

10 . The drainage system according to claim 7 , wherein the noise level is calculated from an amplitude of the percentage change of the pressure within the drainage lumen.

11 . The drainage system according to claim 7 , wherein the noise level is calculated by performing a Fast-Fourier-Transform (FFT) on a plurality of absolute pressure values and determining an amplitude of a high frequency noise portion of the FFT.

12 . The drainage system according to claim 1 , wherein the controller reduces the pressure level of the pressurized air when the noise level drops below a threshold value.

13 . The drainage system according to claim 1 , wherein the catheter is configured to be disposed within a urethra to drain urine from a bladder of the patient.

14 . A drainage system, comprising:

a Foley catheter including at least one opening in a distal section;

a urine collection container;

a drainage tube assembly fluidly coupling the Foley catheter and the urine collection container, the drainage tube assembly comprising:

a drainage tube including a drainage lumen;

a sensor disposed in the drainage lumen; and

a connector coupling the drainage tube to the Foley catheter, the connector including an inlet for receiving pressurized air; and

a controller logic communicating with the drainage tube assembly configured to:

i) determine a state of a drainage fluid disposed within the drainage lumen by measuring a pressure within the drainage lumen and calculating a noise level;

ii) modify a pressure level of the pressurized air provided by the connector; and

iii) determine if the drainage lumen is clear of the drainage fluid.

15 . The drainage system according to claim 14 , wherein the controller logic is configured to modify a valve disposed within the connector between a closed position and one or more open positions to modify the pressure level of the pressurized air.

16 . The drainage system according to claim 14 , wherein the controller logic is in communication with a pump configured to provide the pressurized air, the controller logic configured to modify the pressure level of the pressurized air by modifying a speed of the pump.

17 . The drainage system according to claim 14 , wherein the sensor is configured to detect a pressure of a fluid or a presence of a liquid within the drainage lumen.

18 . The drainage system according to claim 14 , wherein a high noise level indicates a mixed fluid state drainage fluid and the controller logic provides a high pressure level of pressurized air.

19 . The drainage system according to claim 18 , wherein the controller logic provides a low positive pressure level of pressurized air, relative to the high pressure level of pressurized air, in response to a trigger, the trigger being a predetermined time frame or an action.

20 . The drainage system according to claim 14 , wherein calculating the noise level includes one of determining a percentage change in pressure values, determining a percentage change in a moving average of pressure values, or performing a Fast Fourier Transform of pressure values to detect an amplitude of a high frequency noise portion.

Continuity (1)

References Cited (400)