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US 4,569,674 AGranted
Continuous vacuum wound drainage system
AssigneeStryker Corporation
InventorsEarl G. Phillips, Robert W. Insalaco, William M. Booth, III
Life of this patent
Estimating the term…
Abstract
A continuous vacuum drainage system for wound drainage. A base unit has apparatus responsive to releasable attachment thereto of a drain reservoir for evacuating the reservoir to a subatmospheric pressure in a predetermined range. The drain reservoir is continuously operable before, during and after release from the base unit for uninterrupted suction draining of a wound.
Claims32
A continuous vacuum drainage system for wound drainage, comprising:
- a drain reservoir;
- a base unit including means for releasably attaching thereto said drain reservoir and having means responsive to releasable attachment thereto of said drain reservoir for evacuating said drain reservoir at a subatmospheric pressure in a predetermined range, said drain reservoir having means continuously operable before, during and after release from said base unit for uninterrupted suction draining of a wound into said drain reservoir.
A continuous vacuum drainage system for wound drainage on a patient, comprising:
- a base unit having a vacuum source;
- means defining a portable drain reservoir bottle alternately (1) engageable on said base unit for charging to a subatmospheric pressure and (2) carriable with the patient to locations remote from a base unit while still at subatmospheric pressure, said drain reservoir bottle having a drain port for connection of said bottle to a wound to be drained for suction draining of wounds with said bottle both (1) engaged with said base unit and (2) located remote from said base unit, said bottle having a vacuum port with seal means for sealing the drain reservoir bottle, said seal means being normally closed while said drain reservoir bottle is at subatmospheric pressure and remote from said base unit;
- means on said base unit for opening said seal means with said bottle engaged on said base unit and said vacuum port connected to said vacuum source for said charging of said base to subatmospheric pressure.
A continuous vacuum drainage system for wound drainage on a patient, comprising:
- a base unit;
- a portable drain reservoir carriable by the patient or a mobile patient support to locations remote from said base unit, said drain reservoir comprising a portable bottle having a drain port for connection of said bottle to a wound to be drained and a vacuum port connectible to a vacuum source for reducing pressure in said bottle;
- said base unit comprising a housing to which said reservoir is releasably attachable and a vacuum source in said housing;
- and
- interengaging means on said reservoir and housing including (1) mounting means for releasable attachment of said reservoir on said housing and (2) vacuum connection means for connecting said vacuum source to said vacuum port,
- said housing including recess means for receiving said reservoir vertically thereinto, said vacuum connection means being located at said recess means of said housing and on the portion of said reservoir receivable in said recess means, such that insertion of said reservoir into said recess means of said housing substantially simultaneously interconnects said guide means and vacuum connection means of said housing and reservoir in a single motion, said wound drain port being located on the top portion of said reservoir in an area thereof outside said housing recess, said reservoir having an emptying port in an area thereof outside said housing recess.
3 more elements
A continuous vacuum drainage system for wound drainage on a patient, comprising:
- a base unit;
- a portable drain reservoir carriable by the patient or a mobile patient support to locations remote from said base unit, said drain reservoir comprising a portable bottle having a drain port for connection of said bottle to a wound to be drained and a vacuum port connectible to a vacuum source for reducing pressure in said bottle;
- said base unit comprising a housing to which said reservoir is releasably attachable and a said vacuum source in said housing;
- and
- interengaging means on said reservoir and housing including (1) mounting means for releasable attachment of said reservoir on said housing and (2) vacuum connection means for connecting said vacuum source to said vacuum port;
- said wound drain port comprising a one-way valve oriented to permit in-flow of drainage liquid from a wound but preventing transfer of fluid out of said reservoir back to said wound,
- said wound drain port includes a boss protruding from said reservoir adjacent the upper end thereof, and including a wound drainage hose terminated in means snugly receivable in telescoped relation with said boss, said snugly receivable means and boss having an L-shaped slot in the free end of one thereof coactive with a pin on the other thereof for effecting releasable locking of said hose on said reservoir, said drain port having a recess at the inner end of the boss to receive the flanged end of said one-way valve and means bearing on said flanged end of said one-way valve to hold the latter in said recess at the inner end of said boss, said boss having a central through-bore for passing of wound drainage liquid from said hose into the interior of said reservoir.
4 more elements
A continuous vacuum drainage system for wound drainage, comprising:
- a drain reservoir placeable at negative pressure to receive drainage from the wound;
- a motor driven vacuum pump and means for effecting a connection of said pump with said drain reservoir for applying said negative pressure thereto;
- control means for controlling said vacuum pump;
- a power source for energizing said vacuum pump and control means;
- said control means comprising window detector means having both a high negative pressure threshold and low negative pressure threshold and being responsive to a negative pressure input below said low negative pressure threshold for turning on said vacuum pump and responsive to a negative pressure input above said high negative pressure threshold for turning off said vacuum pump, said window detector means being operatively interposed between said power source and said motor driven vacuum pump for so turning the pump on and off such that the pressure in said connection ranges freely and automatically between said high and low negative pressure thresholds, and means responsive to the pressure in the connection between said reservoir and pump for supplying the negative pressure input to the window detector means.
2 more elements
A continuous vacuum drainage system for wound drainage, comprising:
- a drain reservoir placeable at negative pressure to receive drainage from the wound;
- a motor driven vacuum pump releasably connected with said drain reservoir for applying said negative pressure thereto;
- control means for controlling said vacuum pump;
- a power source for energizing said vacuum pump and control means;
- said control means comprising motor drive control means interposed between said power source and said motor driven vacuum pump, and means responsive to the pressure in said reservoir and operatively connected to said motor drive control means for maintaining the pressure in said reservoir within a preselected negative pressure range;
- and
- a base unit containing said pump, control means and power source and to which said drain reservoir is releasably engaged, said control means including power switch means responsive to withdrawal of said reservoir from said base unit for shutting off said pump.
4 more elements
A continuous vacuum drainage system for wound drainage, comprising:
- a drain reservoir placeable at negative pressure to receive drainage from the wound;
- a motor driven vacuum pump connected with said drain reservoir for applying said negative pressure thereto;
- control means for controlling said vacuum pump;
- a power source for energizing said vacuum pump and control means;
- said control means comprising motor drive control means interposed between said power source and said motor driven vacuum pump, and means responsive to the pressure in said reservoir and operatively connected to said motor drive control means for maintaining the pressure in said reservoir within a preselected negative pressure range, said power source being a battery, said control means further including battery level detector means connected to said motor drive control means and responsive to a battery charge level below a desired minimum for causing same to shut off said pump.
2 more elements
A continuous vacuum drainage system for wound drainage, comprising:
- a drain reservoir placeable at negative pressure to receive drainage from the wound;
- a motor driven vacuum pump and means for connecting same with said drain reservoir for applying said negative pressure thereto;
- control means for controlling said vacuum pump;
- a power source for energizing said vacuum pump and control means;
- said control means comprising motor drive control means interposed between said power source and said motor driven vacuum pump, and means responsive to the pressure in said reservoir and operatively connected to said motor drive control means for maintaining the pressure in said reservoir within a preselected negative pressure range, said control means further including high flow monitor means including indicator means and counter means responsive to running of said vacuum pump for an excessive time for actuating said indicator means.
2 more elements
A continuous vacuum drainage system for wound drainage, comprising:
- a drain reservoir placeable at negative pressure to receive drainage from the wound;
- a motor driven vacuum pump and means for connecting same with said drain reservoir for applying said negative pressure thereto;
- control means for controlling said vacuum pump;
- a power source for energizing said vacuum pump and control means;
- said control means comprising motor drive control means interposed between said power source and said motor driven vacuum pump, and means responsive to the pressure in said reservoir and operatively connected to said motor drive control means for maintaining the pressure in said reservoir within a preselected negative pressure range, said control means further including low flow monitor means including indicator means and counter means responsive to running of said vacuum pump for an insufficient time for actuating said indicator means.
2 more elements
A continuous vacuum drainage system for wound drainage, comprising:
- a drain reservoir placeable at negative pressure to receive drainage from the wound;
- a motor driven vacuum pump and means for connecting same with said drain reservoir for applying said negative pressure thereto;
- control means for controlling said vacuum pump;
- a power source for energizing said vacuum pump and control means;
- said control means comprising motor drive control means interposed between said power source and said motor driven vacuum pump, and means responsive to the pressure in said reservoir and operatively connected to said motor drive control means for maintaining the pressure in said reservoir within a preselected negative pressure range, said power source comprising a battery, said control means further including indicator means and monitor means responsive to at least one of a low battery charge level, a too long pump run time, or a too short pump run time, for actuating said indicator means, said monitor means including flip-flop means responsive to actuation of a said indicator means for maintaining said indicator means actuated.
2 more elements
A continuous vacuum drainage system for wound drainage on a patient, comprising:
- a base unit;
- a portable drain reservoir carriable by the patient or a mobile patient support to locations remote from said base unit, said drain reservoir comprising a portable bottle having a drain port for connection of said bottle to a wound to be drained and a vacuum port connectible to a vacuum source for reducing pressure in said bottle;
- said base unit comprising a housing to which said reservoir is releasably attached and a vacuum source in said housing;
- and
- interengaging means on said reservoir and housing including (1) mounting means for releasable attachment of said reservoir on said housing and (2) vacuum connection means for connecting said vacuum source to said vacuum port, in which said vacuum connection means on said reservoir includes a one-way valve means aimed to permit withdrawal of gases from said reservoir but preventing fluid flow therethrough back into said reservoir, and further includes a hydrophobic filter in series between said one-way valve means and the interior of said reservoir for passing gases but preventing escape of liquid from said reservoir to said one-way valve.
2 more elements
A continuous vacuum drainage system for wound drainage on a patient, comprising:
- a base unit;
- a portable drain reservoir carriable by the patient or a mobile patient support to locations remote from said base unit, said drain reservoir comprising a portable bottle having a drain port for connection of said bottle to a wound to be drained and a vacuum port connectible to a vacuum source for reducing pressure in said bottle;
- said base unit comprising a housing to which said reservoir is releasably attached and a vacuum source in said housing;
- and
- interengaging means on said reservoir and housing including (1) mounting means for releasable attachment of said reservoir on said housing and (2) vacuum connection means for connecting said vacuum source to said vacuum port;
- means on said reservoir defining a resiliently flexible wall having one side thereof facing into said reservoir and the opposte side thereof facing outward of said drain reservoir, said flexible wall being visible from outside said drain reservoir, said wall having a first shape with no pressure drop thereacross and a second and visibly different shape when said drain reservoir is evacuated for indicating that the interior of the reservoir is at a negative pressure.
3 more elements
A continuous vacuum drainage system for wound drainage on a patient, comprising:
- a base unit;
- a portable drain reservoir carriable with the patient to locations remote from said base unit, said drain reservoir having a drain port for connection to a wound to be drained and a vacuum port;
- said base unit comprising a housing on which said reservoir is releasably engaged and a vacuum source in said housing thereby engaged with said vacuum port of said reservoir;
- and
- interengaging means on said reservoir and housing actuable in response to said engagement of said reservoir on said housing and vacuum sensing means actuable in response to reservoir, said one-way valve means being located in and intermediate the ends of said boss.
2 more elements
Dependencies are inferred from the claim text.