Wound drainage equipment

Claim 2

Apparatus for draining body fluids comprising a pump having a movable pumping element and a guide element having a backing surface adjacent thereto, said pumping element being mounted for periodic relative movement along said guide element in close association therewith, a disposable fluid drainage kit comprising a tubing adapted for connection at one end to a catheter, a section of the tubing spaced from said fitting having a resiliently collapsible wall portion, said collapsible wall portion being adapted to be held by said guide element in interfitting relationship with said pumping element, cyclically operable drive means for the pumping element, said drive means causing the pumping element to progressively squeeze the tubing against the backing surface, and a branch line leading from the tubing at a point upstream from the pump, said line providing for controlled venting of the tubing to atmosphere and the kit including a sealed drainage bag connected to the downstream end of said tubing for collection of fluid propelled by said pump.

Claim 3

Apparatus according to claim 1, further including an exhaust port at the top of said bag, said port providing for the escape of air from the bag during a pumping operation and a filter in said port.

Claim 4

A disposable drainage kit for use with a pump having a cyclically operable pumping element and a guide element having a backing surface adjacent thereto, wherein the pumping element is adapted to travel in a path extending along the backing surface in close association therewith, said kit comprising a tube adapted at one end to be connected to a catheter, a sealed collection bag at the other end of said tube for collecting body fluids flowing through said tube, said tube having a section intermediate the collection bag and the end which is adapted to be connected to the catheter having a resiliently collapsible wall, said resiliently collapsible wall section fitting between the pumping element and the guide element and being adapted for peristaltic squeezing of the wall section whereby fluids are propelled to the collection bag, and a vent located in said tube at at point upstream from said section for controllably venting said tube to atmosphere.

Claim 5

A disposable drainage kit for use with a pump having a cyclically operable pumping element and a guide element having a backing surface adjacent thereto, wherein the pumping element is adapted to travel in a path extending along the backing surface in close association therewith, said kit comprising a tube adapted at one end to be connected to a catheter, a sealed collection bag at the other end of said tube for collecting body fluids flowing through said tube, said tube having a section intermediate the collection bag and the end which is adapted to be connected to the catheter having a resiliently collapsible wall, said resiliently collapsible wall section fitting between the pumping element and the guide element and being adapted for peristaltic squeezing of the wall section whereby fluids are propelled to the collection bag, and a vent located in said tube at at point upstream from said section for controllably venting said tube to atmosphere.

Claim 6

Apparatus for collecting body fluids comprising a sealed collection bag having a port at the top for venting the interior to atmosphere, a drainage tube connected to the bag, the tube having an inlet end being adapted to be connected to a catheter, an intermediate portion of the tube having a resiliently collapsible wall, a pump means for periodically producing a wave-like collapsing of the intermediate portion of the tube whereby the contents are propelled towards the collection bag, a port communicating with the tube upstream from the intermediate portion venting said tube to atmosphere, a valve for closing said port, and control means for the valve for opening the port whenever a predetermined negative pressure exists in the tube.

Claim 7

Apparatus for collecting body fluids comprising a sealed collection bag having a port at the top for venting the interior to atmosphere, a drainage tube connected to the bag, the tube having an inlet end being adapted to be connected to a catheter, an intermediate portion of the tube having a resiliently collapsible wall, a pump means for periodically producing a wave-like collapsing of the intermediate portion of the tube whereby the contents are propelled towards the collection bag, a port communicating with the tube upstream from the intermediate portion venting said tube to atmosphere, a valve for closing said port, and control means for the valve for opening the port whenever a predetermined negative pressure exists in the tube.

Claim 8

Apparatus according to claim 4, further including means operable at will for periodically venting the tube to atmosphere.

Claim 9

Apparatus for draining fluids from a body cavity comprising a vented collection receptacle for the fluids, a tube connected to said receptacle, the tube having a fluid inlet opening at a point remote from the receptacle and further having a vent opening at a point downstream of the inlet opening, a portion of the tube between the vent opening and the receptacle being formed of a resilient material adapted to be subjected to peristaltic squeezing action to propel the fluid to the receptacle and a pump means including a guide element having an elongated backing surface adapted to contact the tube wall and a movable pump element spaced from the guide element to allow the tube to fit therebetween to cyclically and progressively squeeze the tubing against the backing surface.

Claim 10

Apparatus for draining fluids from a body cavity comprising a vented collection receptacle for the fluids, a tube connected to said receptacle, the tube having a fluid inlet opening at a point remote from the receptacle and further having a vent opening at a point downstream of the inlet opening, a portion of the tube between the vent opening and the receptacle being formed of a resilient material adapted to be subjected to peristaltic squeezing action to propel the fluid to the receptacle and a pump means including a guide element having an elongated backing surface adapted to contact the tube wall and a movable pump element spaced from the guide element to allow the tube to fit therebetween to cyclically and progressively squeeze the tubing against the backing surface.

Claim 11

Apparatus for the draining of body fluids comprising a unitary disposable drainage kit, said kit comprising a collection receptacle for the collection of body fluids, a tube connected to the receptacle, the tube having a fluid inlet at a point remote from the receptacle, a portion of the tube intermediate the inlet opening and the receptacle being formed of a resilient material adapted to be subjected to peristaltic squeezing action to thereby propel the contents to the collection receptacle; a pump means for imparting the peristaltic squeezing action to the tube comprising a pumping element and a guide element between which the tube fits to be subjected to peristaltic squeezing action whereby the contents of the tube are propelled to the receptacle without contact with the pump, means for effecting relative shifting motion of the guide and pumping elements between a loading position in which clearance is provided therebetween to facilitate sideways loading and removal of the tube and other drainage kit parts and an operating position in which the pumping element and the guide element effect squeezing action on the tube and means for limiting suction in said tube in the region of the tube upstream from the pumping element.

Claim 12

Apparatus for the draining of body fluids comprising a unitary disposable drainage kit, said kit comprising a collection receptacle for the collection of body fluids, a tube connected to the receptacle, the tube having a fluid inlet at a point remote from the receptacle, a portion of the tube intermediate the inlet opening and the receptacle being formed of a resilient material adapted to be subjected to peristaltic squeezing action to thereby propel the contents to the collection receptacle; a pump means for imparting the peristaltic squeezing action to the tube comprising a pumping element and a guide element between which the tube fits to be subjected to peristaltic squeezing action whereby the contents of the tube are propelled to the receptacle without contact with the pump, means for effecting relative shifting motion of the guide and pumping elements between a loading position in which clearance is provided therebetween to facilitate sideways loading and removal of the tube and other drainage kit parts and an operating position in which the pumping element and the guide element effect squeezing action on the tube and means for limiting suction in said tube in the region of the tube upstream from the pumping element.