Baxter International Inc.

Other

Biosurgical Corporation

Russell James Redmond

Alan Kirby Plyley

Gordon Howard Epstein

A method and apparatus for filling a syringe-type applicator having multiple material reservoirs are disclosed. The method and apparatus permits the individual component reservoirs to be simultaneously filled without risk of contamination or unintentional component mixing. The method and apparatus are particularly useful in the preparation and delivery of multiple component tissue sealants such a fibrinogen adhesive compositions.

Direct dual filling device for sealing agents

Pistol grip manually operable irrigation surgical instrument

Manually operable irrigation surgical instrument

A medical fluid applicator for dispensing a fluid onto biological tissues in tissue adhesive or sealant applications includes a dispensing pathway with an audible loudness indicator that signals the cumulative amount of fluid delivered by varying the pitch or tone of audible signals emitted at discrete volumetric increments. A suction pathway is also included for applying vacuum pressure to the applicator tip contemporaneous with the fluid application. The medical fluid applicator further includes a clearing pathway for retrogradedly withdrawing coagulated mixed fluids, such as mixed two-part tissue adhesives, from the applicator tip. A valve manifold and a shuttle valve are actuated to adjust the operation of vacuum pressure in the device between the various suctioning, clearing, and venting conduits of the device. The valve manifold is also adapted to couple a vent pathway and the suction pathway simultaneously to the vacuum conduit adapted for connection to a vacuum source. The coupling of vacuum to these pathways may be selectively adjusted by use of inversely and reciprocally shaped valving apertures on the valve manifold, such that preselected levels of applied suction at the suction pathway may be achieved. The device also includes a supply device portion and an applicator portion removably coupled thereto. The supply device portion includes the proximal portions of the dispensing assembly including the audible loudness indicator and the fluid reservoirs. The applicator portion includes the suction conduit, the clearing conduit, and a mixing conduit for mixing the components of the fluid reservoirs immediately prior to fluid delivery. A filling dispenser is further provided which is keyed to engage the supply device portion of the device in a predetermined orientation such that each fluid reservoir of the supply device is coupled for filling from a specified, predetermined filling reservoir.

Applicator for dispensing measured quantities with use of controlled suction

The invention provides a handheld, manually operable fluid applicator, particularly suited to the needs of surgeons, for dispensing a multi-component fluid applicator, for example fibrin and thrombin components of a tissue adhesive. The sealant components undergo turbulent mixing in a mixing chamber which causes a sharp change of at least 60 degrees in the direction of flow of each sealant component, to provide effective mixing and a quality sealant product. The mixing chamber has an increased cross-sectional area over the combined areas of the component supply passages and the fluid flows are directly opposed to impinge on each other in the mixing chamber. The mixing chamber is incorporated in a novel one-piece flexible and resilient manifold. Dual nozzle spray applicators with poppet valves are also disclosed.

Turbulence mixing head for a tissue sealant applicator and spray head

The invention provides a handheld, manually operable fluid applicator, particularly suited to the needs of surgeons, which can dispense multiple medically useful fluids, for example fibrin and thrombin components of a tissue adhesive, and which has a smooth feel and action. The applicator has a novel actuator mechanism providing a comparatively higher mechanical advantage in a commencement phase of the actuator stroke and a comparatively lower mechanical advantage in a completion phase of the actuator stroke.

Growing community of inventors

Goleta, CA, United States of America

Russell James Redmond