Cassette for a surgical fluid management pump system

Patent metadata

Field	Value
Publication number	US-9603990-B2
Application number	US-201313803511-A
Country	US
Kind code	B2
Filing date	Mar 14, 2013
Priority date	Apr 5, 2012
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

A pump system including a pump, an inflow cassette and an outflow cassette. The inflow cassette has a damping flexible membrane covering a damping region configured to dampen pressure pulsations in washing fluid passing through the damping region. The pump has a plurality of individually actionable pressing members that can each be individually actuated to pinch one of a plurality of suction tubes of the outflow cassette to at least partially prevent fluid flow through the one of the plurality of the suction tubes.

First claim

I claim:

1. A pump system comprising:
a pump having an inflow cassette receptacle and an outflow cassette receptacle therein, each of the inflow cassette receptacle and the outflow cassette receptacle having a rotary motor rotating a wheel, the pump having a plurality of individually actionable pressing members;
an inflow cassette configured to be inserted into the inflow cassette receptacle of the pump, the inflow cassette comprising:
an inflow cassette housing having an inflow internal flow path;
inflow peristaltic tubing connected to the inflow cassette housing;
an input tube fluidly connected to the inflow internal flow path and being configured to provide a washing fluid to the inflow cassette housing; and
an inflow tube fluidly connected to the inflow internal flow path and being configured to provide the washing fluid to a patient;

an outflow cassette configured to be inserted into the outflow cassette receptacle of the pump, the outflow cassette comprising:
an outflow cassette housing having an outflow internal flow path;
outflow peristaltic tubing connected to the outflow cassette housing;
a plurality of suction tubes fluidly connected to the outflow internal flow path; and
a waste tube fluidly connected to the outflow internal flow path;

the wheel of the inflow cassette receptacle engaging the inflow peristaltic tubing when the inflow cassette is inserted into the inflow cassette receptacle of the pump, rotation of the wheel of the inflow cassette receptacle by the rotary motor of the inflow cassette receptacle causing the washing fluid to be pushed through the inflow cassette from the input tube to the inflow tube;
the wheel of the outflow cassette receptacle engaging the outflow peristaltic tubing when the outflow cassette is inserted into the outflow cassette receptacle of the pump, rotation of the wheel of the outflow cassette receptacle by the rotary motor of the outflow cassette receptacle causing the waste fluid to be pushed through the outflow cassette from the plurality of suction tubes to the waste tube;
the inflow cassette housing has a damping flexible membrane covering a damping region of the inflow internal flow path, with the damping flexible membrane being configured to dampen pressure pulsations in the washing fluid passing through the damping region; and
wherein the plurality of individually actionable pressing members can each be individually actuated to pinch one of the plurality of suction tubes to at least partially prevent fluid flow through the one of the plurality of suction tubes.

2. A pump assembly comprising:
a pump housing having a cassette receptacle therein, the cassette receptacle having a rotary motor rotating a wheel, the pump housing having a plurality of individually actionable pressing members; and
a cassette configured to be inserted into the cassette receptacle of the pump housing, the cassette comprising:
a cassette housing having an internal flow path including an ingress path section and an egress path section;
peristaltic tubing connected to the cassette housing and being fluidly located between the ingress path section and the egress path section;
a plurality of suction tubes fluidly connected to the ingress path section, with the ingress path section being fluidly located between the peristaltic tubing and the plurality of suction tubes; and
a waste tube fluidly connected to the egress path section and being configured to provide a fluid to a waste receptacle, with the egress path section being fluidly located between the waste tube and the peristaltic tubing; and

the wheel engaging the peristaltic tubing when the cassette is inserted into the cassette receptacle of the pump housing, rotation of the wheel by the rotary motor causing the fluid to be pushed through the cassette from the plurality of suction tubes to the input tube;
wherein the plurality of individually actionable pressing members can each be individually actuated to pinch one of the plurality of suction tubes to at least partially prevent fluid flow through the one of the plurality of suction tubes.

3. The pump assembly of claim 2 , wherein:
the cassette housing includes a bottom surface having a lock block thereon;
the lock block has a lock edge; and
the pump housing has a movable lock lever with a lock wedge configured to selectively abut against the lock edge to lock the cassette within the pump housing.

4. The pump assembly of claim 2 , wherein:
the cassette housing comprises a body having a pair of legs;
the pair of legs define a U-shaped recessed area; and
the peristaltic tubing is located within the U-shaped recessed area.

5. An inflow cassette for a pump comprising:
a housing having an internal flow path including an ingress path section and an egress path section;
peristaltic tubing connected to the housing and being fluidly located between the ingress path section and the egress path section;
an input tube fluidly connected to the ingress path section and being configured to provide a fluid to the housing, with the ingress path section being fluidly located between the input tube and the peristaltic tubing; and
an inflow tube fluidly connected to the egress path section and being configured to provide the fluid to a patient, with the egress path section being fluidly located between the ingress path section and the inflow tube;
the housing has a damping flexible membrane covering a damping region of the egress path section, with the damping flexible membrane being configured to dampen pressure pulsations in the fluid passing through the damping region.

6. The inflow cassette for the pump of claim 5 , wherein:
the internal flow path includes a pressure sensing region in the egress path section located between the damping region and the inflow tube; and
the housing includes a pressure sensing flexible membrane being fluidly connected to the internal flow path through a slot in a wall of the housing.

7. The inflow cassette for the pump of claim 6 , wherein:
the housing includes a top surface with the damping flexible membrane; and
the pressure sensing flexible membrane is located at the top surface.

8. The inflow cassette for the pump of claim 7 , wherein:
the top surface has a contoured area surrounding the pressure sensing flexible membrane for allowing a pressure sensor to easily be aligned with the pressure sensing flexible membrane; and
the contoured area includes a ramp surrounding the pressure sensing flexible membrane.

9. The inflow cassette for the pump of claim 8 , wherein:
the pressure sensing flexible membrane is circular.

10. The inflow cassette for the pump of claim 7 , wherein:
the housing includes a bottom surface having a lock block thereon; and
the lock block has a lock edge configured to mate with a lock device of the pump to lock the inflow cassette within the pump.

11. The inflow cassette for the pump of claim 5 , wherein:
the inflow tube includes a pinch clamp for preventing fluid flow through the inflow tube.

12. The inflow cassette for the pump of claim 5 , wherein:
the input tube includes a plurality of entrance paths for allowing the input tube to be connected to a plurality of fluid sources;
the input tube further includes an exit path fluidly connected to the ingress path section; and
the plurality of entrance paths and the exit path meet at a junction.

13. The inflow cassette for the pump of claim 12 , wherein:
each of the entrance paths includes a pinch clamp for preventing fluid flow through the entrance paths.

14. The inflow cassette for the pump of claim 13 , wherein:
the housing comprises a body hav

Assignees

• Woolford Brady
• Stryker Corp

Inventors

• Woolford Brady

Classifications

• A61M1/72

  Cassettes forming partially or totally the fluid circuit · CPC title

• A61M3/0258 Primary

  by means of electric pumps · CPC title

• A61M3/0202

  with electronic control means or interfaces · CPC title

• A61M3/0201

  Cassettes therefor · CPC title

• A61M1/74 Primary

  Suction control (underwater drainage A61M1/61) · CPC title