# US 9,872,974 B2 · Wound treatment apparatuses and methods for controlled delivery of fluids to a wound > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,872,974 B2 - Document ID: US9872974B2 - Status: Granted - Kind: B2 - Application number: 14/747,894 - Filed: 2015-06-23 - Published: 2015-10-15 - Granted: 2018-01-23 - Earliest claimed: 2010-01-29 - Assignees: KCI Licensing, Inc. - Applicants: KCI Licensing, Inc. - Inventors: Christopher Brian Locke; David George Whyte - Web page: https://patentgrep.com/patent/US9872974B2 ## CPC - F04B 43/04: Pumps having electric drive - A61M 1/72: {Cassettes forming partially or totally the fluid circuit} - A61M 1/80: {Suction pumps (A61M1/64, A61M1/71, A61M60/00 take precedence)} - A61M 1/92: {with liquid supply means} - A61M 1/96: {Suction control thereof} - A61M 1/962: {having pumping means on the suction site, e.g. miniature pump on dressing or dressing capable of exerting suction} - A61M 3/0201: {Cassettes therefor} - A61M 5/14224: {Diaphragm type} - A61M 5/14586: {pressurised by means of a flexible diaphragm} - F04B 35/045: {using solenoids} - F04B 43/0081: {systems, control, safety measures} - F04B 43/02: having plate-like flexible members, e.g. diaphragms (F04B43/14 takes precedence) - F04B 45/04: having plate-like flexible members, e.g. diaphragms (F04B45/10 takes precedence) - F04B 45/047: Pumps having electric drive - A61J 2205/00: General identification or selection means - A61M 1/912: {Connectors between dressing and drainage tube} - A61M 2205/12: with interchangeable cassettes forming partially or totally the fluid circuit - A61M 2205/33: Controlling, regulating or measuring - A61M 2205/3327: Measuring - A61M 2205/3337: Controlling, regulating pressure or flow by means of a valve by-passing a pump - A61M 2205/60: with identification means - A61M 2205/6054: Magnetic identification systems - A61M 2205/6072: Bar codes - A61M 2205/8212: with means or measures taken for minimising energy consumption - F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F) - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - A61J: CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE ## Abstract Pump cassettes, wound-treatment apparatuses and methods. In some embodiments, a pump cassette comprises: a pump body having a pump chamber, an inlet valve in fluid communication with the pump chamber, and an outlet valve in fluid communication with the pump chamber; a diaphragm coupled to the pump body such that the diaphragm is movable to vary a volume in the pump chamber; and an identifier configured to store one or more properties of the pump cassette such that the identifier is readable by an automated reader to determine the one or more properties. In some embodiments, the pump cassette is configured to be removably coupled to a wound-treatment apparatus having an actuator such that the actuator can be activated to move the diaphragm. ## Claims ### Claim 1 A wound-treatment apparatus, comprising: a pump cassette having a pump body and a diaphragm movably coupled to the pump body to form a chamber having a variable volume in response to the stroke of the diaphragm, wherein the pump body includes an inlet valve adapted to receive fluid from a fluid source into the chamber and an outlet valve adapted to discharge fluid from the chamber to a wound in response to a motivating force that reduces the volume of the chamber; an identifier configurable to store pump information relating to at least one property of the diaphragm, the identifier adapted to be readable by an automated reader to provide the pump information; and an actuating mechanism adapted to be removably coupled to the diaphragm and operable to provide the motivating force to the diaphragm for moving the diaphragm by a desired stroke length in response to the pump information. ### Claim 2 (depends on 1) The wound-treatment apparatus of claim 1, wherein the identifier comprises at least one of a radio-frequency identification (RFD) tag, a barcode, or a magnetic stripe. ### Claim 3 (depends on 1) The wound-treatment apparatus of claim 1, wherein the identifier is a label. ### Claim 4 (depends on 1) The wound-treatment apparatus of claim 1, wherein the identifier is disposed proximate the pump body. ### Claim 5 (depends on 1) The wound-treatment apparatus of claim 1, further comprising an automated reader configured to read the identifier when the actuating mechanism is coupled to the diaphragm to read the pump information. ### Claim 6 (depends on 1) The wound-treatment apparatus of claim 1, wherein the pump information comprises a code adapted to be read by a controller programmed to activate the actuating mechanism. ### Claim 7 (depends on 1) The wound-treatment apparatus of claim 1, wherein the actuating mechanism comprises an actuator activated by a solenoid. ### Claim 8 (depends on 1) The wound-treatment apparatus of claim 1, wherein the actuating mechanism comprises mechanical device adapted to motivate the diaphragm. ### Claim 9 (depends on 1) The wound-treatment apparatus of claim 1, wherein the at least one property related to diaphragm includes one or more of the diameter of the diaphragm, the area of the diaphragm, the stroke of the diaphragm, and the change in volume in the chamber caused by a stroke of the diaphragm. ### Claim 10 (depends on 1) The wound-treatment apparatus of claim 1, wherein the inlet valve and outlet valve each comprises at least one of a ball valve, a duckbill valve, or an umbrella valve. ### Claim 11 (depends on 1) The wound-treatment apparatus of claim 1, wherein the diaphragm is operable to alternately increase and decrease the volume of the chamber. ### Claim 12 (depends on 11) The wound-treatment apparatus of claim 11, wherein the inlet valve is open and the outlet valve is closed when the diaphragm increases the volume of the chamber. ### Claim 13 (depends on 11) The wound-treatment apparatus of claim 11, wherein the outlet valve is open and the inlet valve is closed when the diaphragm decreases the volume of the chamber. ### Claim 14 (depends on 11) The wound-treatment apparatus of claim 11, wherein the actuator is operable to provide motivating force to the diaphragm to alternately increase and decrease the volume of the chamber. ### Claim 15 (depends on 1) The wound-treatment apparatus of claim 1, wherein the fluid source is a fluid container adapted to be seated in the pump cassette. ### Claim 16 (depends on 1) The wound-treatment apparatus of claim 1, further comprising a conduit having a first end coupled to the inlet valve of the pump body and a second end configured to be coupled to the fluid source. ### Claim 17 (depends on 16) The wound-treatment apparatus of claim 16, wherein the fluid source is a fluid container adapted to be seated in the pump cassette. ### Claim 18 (depends on 17) The wound-treatment apparatus of claim 17, further comprising the fluid container and a fluid disposed in the fluid container. ### Claim 19 (depends on 1) The wound-treatment apparatus of claim 1, further comprising a conduit having a first end coupled to the outlet valve and a second end configured to be coupled to a wound dressing disposed adjacent the wound. ### Claim 20 (depends on 1) The wound-treatment apparatus of claim 1, further comprising a support device coupled to the pump body and a receptacle configured to receive the fluid source. ### Claim 21 (depends on 1) The wound-treatment apparatus of claim 1, further comprising a vacuum source operable to apply negative pressure to a wound. ### Claim 22 Wound-treatment apparatus for treating a wound, comprising: a pump cassette having a pump body and a plurality of diaphragms movably coupled to the pump body to form a plurality of chambers, each chamber having a variable volume in response to the stroke of a corresponding diaphragm, wherein the pump body includes an inlet valve for each chamber adapted to receive fluid from a fluid source into the chamber and an outlet valve for each chamber adapted to discharge fluid from the chamber to a wound in response to a motivating force that reduces the volume of the chamber; an identifier configurable to store pump information relating to at least one property of at least one of the plurality of diaphragms, the identifier adapted to be readable by an automated reader to provide the pump information; and a plurality of actuating mechanism, each one adapted to be removably coupled to a corresponding one of the plurality of diaphragms and operable to provide the motivating force to the plurality of diaphragms for moving each one of the plurality of diaphragms by a desired stroke length in response to the pump information. ### Claim 23 (depends on 22) The wound-treatment apparatus of claim 22, further comprising a controller coupled to the plurality of actuating mechanism and configured to activate the actuating mechanism. ### Claim 24 (depends on 23) The wound-treatment apparatus of claim 23, wherein the controller is configured to activate the plurality of actuating mechanism at least simultaneously or sequentially.