Abstract: Systems and apparatuses for blood oxygenation are disclosed. A system includes a first layer defining a plurality of banks of first channels each extending in a first direction. The plurality of banks of first channels are configured to receive blood via a trunk channel. The system includes a second layer defining a bank of second channels extending in a second direction. The bank of second channels are configured to receive oxygen. The first direction is different from the second direction. The system includes a membrane disposed between the first layer and the second layer and configured to cause the oxygen to permeate from the second layer to the first layer to oxygenate the blood.

Abstract: This disclosure describes microfluidic tissue biopsy and immune response drug evaluation devices and systems. A microfluidic device can include an inlet channel having a first end configured to receive a fluid sample optionally containing a tissue sample. The microfluidic device can also include a tissue trapping region at the second end of the inlet channel downstream from the first end. The tissue trapping region can include one or more tissue traps configured to catch a tissue sample flowing through the inlet channel such that the fluid sample contacts the tissue trap. The microfluidic device can also include one or more channels providing an outlet.

Abstract: This disclosure describes microfluidic tissue biopsy and immune response drug evaluation devices and systems. A microfluidic device can include an inlet channel having a first end configured to receive a fluid sample optionally containing a tissue sample. The microfluidic device can also include a tissue trapping region at the second end of the inlet channel downstream from the first end. The tissue trapping region can include one or more tissue traps configured to catch a tissue sample flowing through the inlet channel such that the fluid sample contacts the tissue trap. The microfluidic device can also include one or more channels providing an outlet.

Abstract: This disclosure describes techniques for fabricating a high-resolution, non-cytotoxic and transparent microfluidic device. A material can be selected based on having an optical property with a predetermined degree of transparency to provide viewability of a biological sample through the microfluidic device and a level of cytotoxicity within a predetermined threshold to provide viability of the biological sample within the microfluidic device. An additive manufacturing technique can be selected from a plurality of additive manufacturing techniques for fabricating the microfluidic device based on the selected material to provide a resolution of dimensions of one or more channels of the microfluidic device higher than a predetermined resolution threshold.

Abstract: This disclosure describes microfluidic tissue biopsy and immune response drug evaluation devices and systems. A microfluidic device can include an inlet channel having a first end configured to receive a fluid sample optionally containing a tissue sample. The microfluidic device can also include a tissue trapping region at the second end of the inlet channel downstream from the first end. The tissue trapping region can include one or more tissue traps configured to catch a tissue sample flowing through the inlet channel such that the fluid sample contacts the tissue trap. The microfluidic device can also include one or more channels providing an outlet.

Abstract: This disclosure describes techniques for fabricating a high-resolution, non-cytotoxic and transparent microfluidic device. A material can be selected based on having an optical property with a predetermined degree of transparency to provide viewability of a biological sample through the microfluidic device and a level of cytotoxicity within a predetermined threshold to provide viability of the biological sample within the microfluidic device. An additive manufacturing technique can be selected from a plurality of additive manufacturing techniques for fabricating the microfluidic device based on the selected material to provide a resolution of dimensions of one or more channels of the microfluidic device higher than a predetermined resolution threshold.

Abstract: A microfluidic device for modeling a tumor-immune microenvironment can include a multiwell plate defining a plurality of microenvironment units fluidically coupled with a plurality of wells. Each microenvironment unit of the plurality of microenvironment units can include one or more compartments. Each microenvironment unit can include a trapping feature positioned within the one or more compartments. The trapping feature can be defined by a portion of at least one of a sidewall or a floor of the one or more compartments. The trapping feature can restrict movement of a tissue sample introduced into the one or more compartments and to allow fluid to flow past the tissue sample. The microfluidic device can include a plurality of micropumps each coupled with a respective well and configured to control movement of a respective fluid sample through each respective well.

Abstract: This disclosure describes microfluidic tissue biopsy and immune response drug evaluation devices and systems. A microfluidic device can include an inlet channel having a first end configured to receive a fluid sample optionally containing a tissue sample. The microfluidic device can also include a tissue trapping region at the second end of the inlet channel downstream from the first end. The tissue trapping region can include one or more tissue traps configured to catch a tissue sample flowing through the inlet channel such that the fluid sample contacts the tissue trap. The microfluidic device can also include one or more channels providing an outlet.

Abstract: The present disclosure provides a handpiece for trans-canal delivery of a therapeutic substance to the inner ear. The handpiece can be inserted into the middle ear via a surgical tympanotomy approach. The handpiece can be integrated with a micropump and a fluid reservoir. The handpiece can enable a controlled injection of a therapeutic substance directly through the round window membrane and into the inner ear. The direct delivery of the therapeutic substance to the inner ear can enable the delivery of a precise amount of therapeutic substance into the inner ear. The micropump can include a self-contained fluid reservoir that can provide predetermined volumes of fluid to precise areas of the patient.

Abstract: The present solution provides systems and methods for trans-round window membrane drug delivery. As an overview, a system can include a micropump that is connected to a flexible cannula. The cannula can be threaded through a handpiece that can be used to pierce the round window membrane of a patient. Using the handpiece, the cannula can be inserted through the round window membrane to improve the distribution of the delivered drug throughout the inner ear. The present solution can function as a small implantable or wearable device that can be used for both chronic and acute trans-round window membrane drug delivery. With this configuration, the micropump can constantly or intermittently deliver, over a period of days to months, small volumes of drugs from an internal reservoir.

Abstract: A system for cell bioprocessing and cell therapy manufacturing can include a series of microfluidic modules to enable continuous-flow end-to-end cell bioprocessing. Each module can implement a different technology, and the modules can be coupled to one another to perform various unit operations in the cell bioprocessing or cell-therapy manufacturing chain to enable direct processing of a blood or blood product sample. The system can automatically and continuously process the sample into genetically-modified lymphocytes or T cells for cellular therapy. The technologies implemented by each module in the system can include any combination of microfluidic acoustophoresis, microfluidic acoustophoretic media exchange or cell washing, and continuous-flow microfluidic electrotransfection. Modules implementing these microfluidic technologies can be interconnected with plastic tubing or with a custom manifold.

Abstract: This disclosure describes techniques for fabricating a high-resolution, non-cytotoxic and transparent microfluidic device. A material can be selected based on having an optical property with a predetermined degree of transparency to provide viewability of a biological sample through the microfluidic device and a level of cytotoxicity within a predetermined threshold to provide viability of the biological sample within the microfluidic device. An additive manufacturing technique can be selected from a plurality of additive manufacturing techniques for fabricating the microfluidic device based on the selected material to provide a resolution of dimensions of one or more channels of the microfluidic device higher than a predetermined resolution threshold.

Abstract: This disclosure describes microfluidic tissue biopsy and immune response drug evaluation devices and systems. A microfluidic device can include an inlet channel having a first end configured to receive a fluid sample optionally containing a tissue sample. The microfluidic device can also include a tissue trapping region at the second end of the inlet channel downstream from the first end. The tissue trapping region can include one or more tissue traps configured to catch a tissue sample flowing through the inlet channel such that the fluid sample contacts the tissue trap. The microfluidic device can also include one or more channels providing an outlet.

Abstract: A destroy on-demand electrical device includes a substrate layer formed using a soluble material (e.g., a Germanium oxide), a semi-conductor layer formed from a material that can become soluble upon further processing (e.g., Germanium) and conductive elements, formed from a metallic material such as Copper. The device is coupled with one or more disintegration sources that contain disintegration agents (e.g., Hydrogen Peroxide) that can promote disintegration of the device. The device can be destroyed in response to actuation of the disintegration sources, for example by actuation of a source that produces Hydrogen Peroxide for use in oxidizing the semi-conductor layer. Water can be used to dissolve dissolvable substrate layers. The semi-conductor layer can be destroyed by first processing this layer to form a dissolvable material and dissolving the processed layer with water. The remaining Copper components disintegrate once their underlying layer have been dissolved and/or by use of a salt.

Abstract: An compact hydraulic manifold for transporting shear sensitive fluids is provided. A channel network can include a trunk and branch architecture coupled to a bifurcation architecture. Features such as tapered channel walls, curvatures and angles of channels, and zones of low fluid pressure can be used to reduce the size while maintaining wall shear rates within a narrow range. A hydraulic manifold can be coupled to a series of microfluidic layers to construct a compact microfluidic device.

Abstract: An adhesive article includes a biocompatible and at least partially biodegradable substrate having a surface; and a plurality of protrusions extending from the surface. The protrusions include a biocompatible and at least partially biodegradable material, and have an average height of less than approximately 1,000 micrometers.

Abstract: MEMS and microelectronic devices and fabrication methods feature providing a first material including a glass, providing a second material having an elastic modulus greater than the elastic modulus of silicon, causing the second material to have a surface with a RMS surface roughness of greater than 0.001 ?m and less than approximately 0.15 ?m, contacting the surface of the second material to a surface of the first material, and applying a voltage between the first and second materials to cause an anodic bond to form.

Abstract: The present invention relates to methods for the design and fabrication of biological constructs, such as organ simulants or organ replacements, which contain complex microfluidic architecture. Designs of the present invention provide increased space in the lateral dimension, enabling a large number of small channels for small vessels.

Abstract: An adhesive article includes a biocompatible and at least partially biodegradable substrate having a surface; and a plurality of protrusions extending from the surface. The protrusions include a biocompatible and at least partially biodegradable material, and have an average height of less than approximately 1,000 micrometers.

Abstract: Electrostatic capacitance measurements are used to detect chemical or biological analytes, or chemical interactions, with great sensitivity. A diaphragm is coated with a material capable of selectively interacting with an analyte of interest, and interaction of the analyte with the coating exerts stresses tangential to the diaphragm's surface. These stresses cause diaphragm displacements that are sensed as varying capacitance.