# US 8,771,259 B2 · System for treating a wound with suction and method of detecting a loss of suction

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,771,259 B2
- Document ID: US8771259B2
- Status: Granted
- Kind: B2
- Application number: 13/556,839
- Filed: 2012-07-24
- Published: 2012-11-15
- Granted: 2014-07-08
- Earliest claimed: 2005-07-14
- Assignees: Boehringer Technologies, L.P.
- Applicants: John Karpowicz; Christopher L. Radl; Kevin P. Klocek; John R. Boehringer; Derek Norton
- Inventors: John Karpowicz; Christopher L. Radl; Kevin P. Klocek; John R. Boehringer; Derek Norton
- Web page: https://patentgrep.com/patent/US8771259B2

## CPC

- A61M 1/784: {by filtering, sterilising or disinfecting the exhaust air, e.g. swellable filter valves}
- A61M 1/60: {Containers for suction drainage, adapted to be used with an external suction source (containers not adapted for subjection to vacuum A61M1/69)}
- A61M 1/72: {Cassettes forming partially or totally the fluid circuit}
- A61M 1/73: {comprising sensors or indicators for physical values}
- A61M 1/74: {Suction control (underwater drainage A61M1/61)}
- A61M 1/80: {Suction pumps (A61M1/64, A61M1/71, A61M60/00 take precedence)}
- A61M 1/86: {Connectors between drainage tube and handpiece, e.g. drainage tubes detachable from handpiece}
- A61M 1/882: {Draining devices provided with means for releasing antimicrobial or gelation agents in the drained fluid}
- A61M 1/96: {Suction control thereof}
- A61M 1/964: {having venting means on or near the dressing}
- A61M 27/00: Drainage appliance for wounds or the like {, i.e. wound drains, implanted drains} ({negative pressure wound therapy devices A61M1/90;} implements for holding wound open A61B17/02 {; middle ear drainage A61F11/202})
- A61M 1/92: {with liquid supply means}
- A61M 1/982: {with means for detecting level of collected exudate}
- A61M 2205/123: with incorporated reservoirs
- A61M 2205/15: Detection of leaks
- A61M 2205/3331: Pressure; Flow
- A61M 2205/8206: battery-operated
- A61M 2205/8237: Charging means
- 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)}

## Abstract

A system for applying suction to a wound is provided, including a suction source for providing suction to a conduit operatively associated with the wound to communicate suction to the wound, a vent in fluid communication with the conduit to provide a reference airflow into the conduit when the system is in operation, such that a loss of suction at the wound is indicated by deviation from the reference airflow, and a waste collector canister between the wound and the suction source for collecting liquids aspirated from the wound, wherein the canister includes one or more disks containing gelling agent.

## Claims

### Claim 1

A system for applying suction to a wound, comprising:
a portable positive displacement pump for providing suction to a conduit operatively associated with the wound to communicate suction to the wound, the pump being capable of operation at variable speed;
a vent in fluid communication with the conduit to provide a reference airflow into the conduit when the system is in operation, such that a loss of suction at the wound is indicated by deviation from the reference airflow;
a flow rate monitor to monitor airflow through the conduit and to indicate reference airflow and deviation above and below the reference airflow; and
a pressure transducer for detecting pressure at the pump, wherein the pump speed is controlled to maintain the pressure sensed by the transducer based on a pressure setting;
wherein the airflow is determined by counting pump revolutions over a period of time.