Carefusion 303, Inc.

Fanqing Meng

Marc Weimer

Zehra Sevinc

Siddarth K Shevgoor

Daniel I Kimm

James Joseph Semler

Tea Datashvili

Shang-Ren Wu

Chinnu Brahatheeswaran

Bonding dissimilar materials of medical device components can be carried out by applying an adhesive on at least one surface of two components which are composed of dissimilar materials and contacting the surfaces and exposing the contacted surfaces to heat and/or irradiate the adhesive to cure the adhesive and bond the surfaces. One medical component, e.g., medical tubing, can be composed of a non-polar, polyvinyl chloride free thermoplastic polymeric material and the other medical component, e.g., a medical connector, can be composed of polyacrylate, polyacrylonitrile, acrylonitrile-butadiene-styrene (ABS), methyl methacrylate-acrylonitrile-butadiene-styrene (mABS), polyester, and/or a polycarbonate material. The adhesive formulation can include: (a) a polyolefin oligomer having reactive acrylate groups and alkenyl groups, (b) an initiator, and optionally (c) a solvent.

Adhesive for bonding dissimilar materials in medical device

Pumping segments are described herein. In certain embodiments, a peristaltic pumping segment include a tubing segment, a plunger, a downstream occluder, and an upstream check valve. The plunger is movable to selectively expand the pumping volume to draw in fluid flow and contract the pumping volume to administer the fluid flow. The occluder is movable to selectively engage against the downstream portion to prevent fluid flow from the downstream portion during expansion of the pumping volume and to permit fluid flow from the pumping volume through the downstream portion during contraction of the pumping volume. The check valve outlet is in fluid communication with the pumping volume, and the valve element is configured to permit fluid flow from the valve inlet to the pumping volume during expansion of the pumping volume and to prevent fluid flow from the pumping volume to the valve inlet during contraction of the pumping volume.

Peristaltic pumping segment with check valve

Pump assemblies for fluid flow are provided. A pump assembly includes a fluid flow pump, a first tubing pathway configured to receive a fluid input tube and a second tubing pathway configured to receive a fluid output tube. A non-contact tubing dimension measurement assembly is configured to measure a tubing outside diameter (OD). Methods of operating a fluid flow pump are also provided.

Medical tubing dimension scanning

A medical pumping system is provided. The medical pumping system includes a fluid pump having a fluid inlet connection, a fluid outlet connection, an actuator and a backing surface. A tube of an intravenous set is disposed between the fluid inlet connection and the fluid outlet connection of the fluid pump, and disposed between the actuator and the backing surface, and a binding contact interface. The tube and the actuator are coupled together by the binding contact interface. The actuator is configured to actively pull a portion of the tube into an open position during a pump cycle. A medical pump and an infusion set are also provided.

Controllable pumping tubing

Tubing, such as medical tubing for administration of intravenous fluid, can include an inner layer, an outer layer concentrically disposed about and surrounding the inner layer, and an intermediate layer interposed between the inner and outer layers. The intermediate layer may include a light protection additive therein.

Multilayer tubing having intermediate layer with additives

The present disclosure is directed to a formulations of cements and methods for bonding dissimilar materials. The formulations and methods can bond a Non-polyvinyl chloride (PVC) containing first polyolefin that is amorphous or has low crystallinity to a second material that is a rigid material or a hard PVC. The methods and formulations can work by co-dissolution at an interface, or activation of a one of the materials prior to bonding.

Methods and formulations for bonding dissimilar materials

Tubing, such as medical tubing for administration of intravenous fluid, can include an outer layer on an inner layer, and, optionally additional layers, in which at least the outer layer and the inner layer are made of a same polymeric material but the outer and inner layers have differing amounts or differing types of a plasticizer such that a hardness of the outer layer is greater than a hardness of the inner layer.

Growing community of inventors

Buffalo Grove, IL, United States of America

Fanqing Meng