摘要:
Disclosed are various methods and bioreactor devices for culturing retinal cells and/or tissues. The bioreactor devices may, in certain embodiments, include a microchannel network, a scaffold for culturing neuroretinal cells, and a porous membrane separating the microchannel network from the scaffold.
摘要:
Methods of fabricating microfluidic structures featuring substantially circular channels are provided. The methods involve (a) providing a patterned wafer comprising at least one exposed electrically conductive region and at least one exposed electrically insulating region; (b) electroplating an inverse channel portion with substantially semicircular cross section onto the wafer, thereby forming a first master mold; (c) employing the first master mold so as to emboss a channel portion in a first polymer sheet; and (d) aligning and bonding the first polymer sheet with a second polymer sheet having a corresponding channel portion such as to define a first channel with substantially circular cross section between the polymer sheets.
摘要:
The invention provides systems and methods for exchanging gas in a microfluidic device, and methods for preparing such microfluidic devices. The systems and methods can be used to transfer oxygen to blood to assist lung function in a patient.
摘要:
The invention provides method of fabricating a scaffold comprising a fluidic network, including the steps of: (a) generating an initial vascular layer for enclosing the chamber and providing fluid to the cells, the initial vascular layer having a network of channels for fluid; (b) translating the initial vascular layer into a model for fluid dynamics analysis; (c) analyzing the initial vascular layer based on desired parameters selected from the group consisting of a characteristic of a specific fluid, an input pressure, an output pressure, an overall flow rate and combinations thereof to determine sheer stress and velocity within the network of channels; (d) measuring the sheer stress and the velocity and comparing the obtained values to predetermined values; (e) determining if either of the shear stress or the velocity are greater than or less than the predetermined values, and (f) optionally modifying the initial vascular layer and repeating steps (b)-(e). The invention also provides compositions comprising a vascular layer for use in tissue lamina as well as a medical devices having a vascular layer and kits.
摘要:
An implantable drug delivery apparatus for delivering a drug into a bodily fluid in a bodily cavity of a patient over a period of time includes a drug supply reservoir to supply drug into a delivery channel and an actuator for delivering the drug to a predetermined location in the bodily cavity of the patient, such as, for example, a cochlea of a human ear. The drug is loaded into the delivery channel while producing substantially negligible flow at an outlet of the delivery channel.
摘要:
An implantable drug delivery apparatus for delivering a drug into a bodily fluid in a bodily cavity of a patient over a period of time includes a drug supply reservoir to supply drug into a delivery channel and an actuator for delivering the drug to a predetermined location in the bodily cavity of the patient, such as, for example, a cochlea of a human ear. The drug is loaded into the delivery channel while producing substantially negligible flow at an outlet of the delivery channel.
摘要:
A method and apparatus for continuously separating or concentrating particles that includes flowing two fluids in laminar flow through a magnetic field gradient which causes target particles to migrate to a waste fluid stream, and collecting each fluid stream after being flowed through the magnetic field gradient.