Dampening element for fluid management system

Patent metadata

Field	Value
Publication number	US-2020200313-A1
Application number	US-201916719011-A
Country	US
Kind code	A1
Filing date	Dec 18, 2019
Priority date	Dec 19, 2018
Publication date	Jun 25, 2020
Grant date	—

Abstract

A fluid management system may include a fluid pump capable of generating a pulsatile flow of fluid, a fluid pathway for transporting the pulsatile flow of fluid from a fluid source through the fluid pump to a medical device, a dampening element in fluid communication with the fluid pathway and operably independent of the fluid pump, the dampening element comprising one or more barrels, each barrel including a movable seal member disposed within the barrel and a biasing member disposed within the barrel and engaged with the movable seal member, the dampening element being responsive to pressure fluctuations of the pulsatile fluid flow to actively dampen the pressure fluctuations, and a fluid flow sensor disposed along the fluid pathway between the dampening element and the medical device to measure a flow rate of the smoothened pulsatile fluid flow in both flow directions.

First claim

What is claimed is:

1 . A fluid management system, comprising:
a fluid pump capable of generating a pulsatile flow of fluid; a fluid pathway for transporting the pulsatile flow of fluid from a fluid source through the fluid pump to a medical device; a dampening element in fluid communication with the fluid pathway, the dampening element comprising one or more barrels, each barrel including a movable seal member disposed within the barrel and a biasing member disposed within the barrel and engaged with the movable seal member, the dampening element being responsive to pressure fluctuations of the pulsatile fluid flow to actively dampen the pressure fluctuations and smoothen the pulsatile fluid flow; and a fluid flow sensor disposed along the fluid pathway between the dampening element and the medical device to measure a flow rate of the smoothened pulsatile fluid flow in both flow directions of the fluid pathway.

2 . The fluid management system of claim 1 , wherein the dampening element is capable of actively dampening the pressure fluctuations in both flow directions.

3 . The fluid management system of claim 1 , wherein the biasing member is an elastic element.

4 . The fluid management system of claim 3 , wherein the elastic element is a spring.

5 . The fluid management system of claim 3 , wherein the elastic element is in compression.

6 . The fluid management system of claim 3 , wherein the elastic element is in tension.

7 . The fluid management system of claim 1 , wherein the biasing member is a gas.

8 . The fluid management system of claim 7 , wherein the biasing member is a compressed gas.

9 . The fluid management system of claim 1 , wherein the biasing member is a vacuum or a partial vacuum.

10 . The fluid management system of claim 1 , wherein the movable seal member includes at least one sealing element extending around a perimeter of the movable seal member.

11 . The fluid management system of claim 1 , further comprising a pressure relief port.

12 . The fluid management system of claim 11 , wherein the pressure relief port is opened by axial translation of the movable seal member.

13 . The fluid management system of claim 1 , wherein each barrel includes an adjustable cap configured to adjust a working length of its barrel.

14 . The fluid management system of claim 13 , wherein each adjustable cap threadably engages its respective barrel.

15 . A fluid management system, comprising:
a fluid pump capable of generating a pulsatile flow of fluid; a fluid pathway for transporting the pulsatile flow of fluid from a fluid source through the fluid pump to a medical device; a dampening element in fluid communication with the fluid pathway, the dampening element comprising a first barrel and a second barrel, the dampening element being responsive to pressure fluctuations of the pulsatile fluid flow to actively dampen the pressure fluctuations and smoothen the pulsatile fluid flow; wherein the first barrel includes a first movable seal member disposed within the first barrel and a first biasing member disposed within the first barrel and engaged with the first movable seal member; and wherein the second barrel includes a second movable seal member disposed within the second barrel and a second biasing member disposed within the second barrel and engaged with the second movable seal member.

16 . The fluid management system of claim 15 , wherein the first barrel dampens the pulsatile fluid flow in a distal direction.

17 . The fluid management system of claim 15 , wherein the second barrel dampens the pulsatile fluid flow in a proximal direction.

18 . The fluid management system of claim 15 , wherein the first barrel is independent of the second barrel.

19 . The fluid management system of claim 15 , wherein the first barrel and the second barrel are formed within a single monolithic structure.

20 . A fluid management system, comprising:
a fluid pump capable of generating a pulsatile flow of fluid; a fluid pathway for transporting the pulsatile flow of fluid from a fluid source through the fluid pump to a medical device; a dampening element in fluid communication with the fluid pathway, the dampening element comprising a first barrel and a second barrel, the dampening element being responsive to pressure fluctuations of the pulsatile fluid flow to actively dampen the pressure fluctuations and smoothen the pulsatile fluid flow; and a fluid flow sensor disposed along the fluid pathway between the dampening element and the medical device to measure a flow rate of the pulsatile fluid flow in both flow directions of the fluid pathway; wherein the first barrel includes a first movable seal member disposed within the first barrel and a first biasing member disposed within the first barrel and engaged with the first movable seal member, the first barrel being configured to dampen the pressure fluctuations in a distal direction; wherein the second barrel including a second movable seal member disposed within the second barrel and a second biasing member disposed within the second barrel and engaged with the second movable seal member, the second barrel being configured to dampen the pressure fluctuations in a proximal direction; wherein the first barrel and the second barrel are both positioned between the fluid pump and the fluid flow sensor.

Assignees

• Boston Scient Scimed Inc

Inventors

• Chu Michael S H
• Patel Mayur Kiran
• Tang Sacha

Classifications

• F16L55/04 Primary

  Devices damping pulsations or vibrations in fluids {(F16L55/02 takes precedence)} · CPC title

• A61M1/772 Primary

  operating alternately · CPC title

• A61M1/73

  comprising sensors or indicators for physical values · CPC title

• F15B1/021

  used for damping · CPC title

• F04B11/0016

  with a fluid spring · CPC title