摘要:
Systems and methods that provide magnetically-enhanced delivery of therapeutic agents to selected tissue are disclosed. The systems and methods involve the use of carrier devices and release devices and two different magnetic fields to move magnetic particles into selected tissue. Movement of the magnetic particles (and any associated therapeutic agent) into the tissue may be assisted by both magnetic attractive forces as well as magnetic repulsive forces.
摘要:
Use of pregnancy-associated plasma protein-A as a marker for inflammatory conditions, and in particular, for acute coronary syndromes is described.
摘要:
A system provides for remote monitoring using asynchronous code division multiple access (CDMA) communication techniques between a base station and one or more transponders. Each transponder is attached or otherwise associated with an object or an environment to be monitored. Upon receipt of an interrogation signal, a transponder generates and transmits a coded transponder signal containing the monitored data. The coded transponder signal is generated using a spreading code. Each transponder is associated with a unique, mutually exclusive set of spreading codes. Each spreading code is based on a unique transponder address and the monitored data to be sent. A detector asynchronously monitors received signals for any of the available spreading codes. Once the detector detects a particular spreading code, the base station can identify the source transponder and extract the monitored data.
摘要:
An implantable stent having surface features adapted to promote an organized growth pattern of infiltrating cells when implanted in a tubular organ is provided. The surface features comprise depressions, pores, projections, pleats, channels or grooves in the stent body and are designed to increase turbulence or stagnation in the flow of a liquid, such as blood through the stent, and/or to promote the growth of infiltrating cells in an organized pattern. Alternatively, the invention stent can be populated with living cells prior to implant and can be heatable from an external source of energy, thereby inducing production of therapeutic bioactive agents from ingrowing cells. The invention also provides an implantable heatable stent for transcutaneously monitoring the flow of fluid through a lumen into which the stent is implanted by measuring the rate at which the heated stent cools in response to blood flow when the source of heat is removed.
摘要:
Use of pregnancy-associated plasma protein-A as a marker for inflammatory conditions, and in particular, for acute coronary syndromes is described.
摘要:
Implantable medical devices that include a non-woven framework are described, as well as methods of using such devices to deliver therapeutic compounds to a patient.
摘要:
Use of pregnancy-associated plasma protein-A as a marker for inflammatory conditions, and in particular, for acute coronary syndromes is described.
摘要:
An automatic manifold for a catheter assembly. Valve means automatically open and close flow between a liquid supply port for connection to injection means and a liquid delivery port for communication with the catheter assembly. A pressure sensor is integrated into the manifold. The manifold also includes a quick-disconnect coupling mechanism for a liquid supply port.
摘要:
The invention provides surgical needles with a porous distal portion from which a liquid injectate will weep or ooze multidirectionally under injection pressure while the porous distal portion of the needle is inserted into a body surface. The porous distal portion of the needle can be fabricated from a porous carbon, metal, ceramic or polymer and preferably has a decreasing gradient of impedance to fluid flowing to the point of the needle to compensate for the falling off of injection pressure as fluid moves towards the point, thereby ensuring uniform weeping of the injectate along the injection course. The needle is adapted for attachment to a catheter or syringe. In another embodiment, a surgical assemblage is provided wherein a porous distal portion having similar fluid flow characteristics is located along the distal end of a catheter, and a needle point is attached to the distal end of the catheter (e.g., a steerable catheter) for piercing tissue. A guidance catheter can be used to direct the invention devices to a remote internal injection site. The invention devices and methods can be used to inject fluids (including those containing nucleic acids for gene therapy) into interior body walls or tissue, such as a beating heart, without substantial loss of fluid and without substantial damage to tissue caused by injectate.
摘要:
An apparatus for flushing a vascular catheter. Inlet and outlet passages extending from inlet and outlet ports, respectively, are selectably in communication with one another via a manually operable member cooperating with a sealing member and biased toward a closed position. Mechanisms for continuously and periodically flushing the catheter are incorporated.