The present disclosure relates generally to the field of medical devices and drug delivery. In particular, the present disclosure relates to implantable medical devices, systems and methods for controlled and consistent drug release through a porous body into a patient.

A surgical access device includes a check valve having baffling discs, a tube, and a housing. The housing has first and second housing halves. Baffling discs are configured to form a lumen. Each baffling disc is a conical annulus and is stacked adjacent to another baffling disc and spaced apart via spacers disposed on each baffling disc. The spacers help define a first gap between adjacent baffling discs for defining a first fluid path. A cover is coupled to the housing and permits access to the surgical access device. The housing is configured to receive the tube and the baffling discs, and the baffling discs are spaced apart from the first and second housing halves defining a second gap therebetween for defining a second fluid path. The first and second gaps form fluid convection channels for guiding fluid flowing in a proximal direction back into itself.

A venous access port assembly having a housing base with a discharge stem, a septum and a cap is disclosed. An interior reservoir is defined by a well in the housing base and the bottom surface of the septum, and a passageway extends from the reservoir through the discharge stem. The cap is secured to the housing base and securely retains the septum in the assembly, compressing an annular flange of the septum against a septum seat of the housing base. An upward facing surface of the housing base includes a septum seat onto which a seating flange of the septum is seated. The discharge port comprises a discharge stem, the discharge stem having a pair of axially spaced ridges that facilitate mechanical connection to a catheter. Each of the ridged has an upper rounded cross-section and a lower rounded cross-section in a section view taken along a central longitudinal plane of the discharge stem.

A vascular access system can include a port configured to be implanted outside of a target body lumen, at least one conduit fluidly connected to the port, and at least one one-way valve proximate the distal end of the conduit and within the fluid pathway of the sidewall of the conduit. The system can also include a gateway element comprising a through lumen operably connected to an outer diameter of the conduit, the gateway element comprising a first radially compressed configuration in which the gateway element causes occlusion within the through lumen, and a second radially expanded configuration in which the gateway element permits passage of fluids within the through lumen.

A vascular access device including a catheter adapter, a port opening, and an elastomeric valve. The catheter adapter extends along a longitudinal axis and includes a proximal end, a distal end, and a lumen extending therebetween. The port opening is formed in a surface of the catheter adapter in fluid communication with a side port of the catheter adapter and the lumen. A structural geometry of the port opening directs a fluid into the lumen in a proximal direction. The elastomeric port valve is disposed within the lumen and configured to deform in response to a transverse force applied thereto. A proximal gap may result between the inner wall forming the lumen and a proximal side of the elastomeric port valve, thereby opening a fluid path.

This present disclosure provides devices, systems, and methods relating to the management of a subject's medical needs involving safely accessing a body cavity. In particular, the present disclosure is directed to body cavity conduit devices and systems that facilitate repeated access to a subject's body cavity for removing fluid or performing a procedure in a manner that provides enhanced comfort, safety, and efficacy.

An assembly for attachment to a gastrostomy feeding tube is provided. The assembly comprises a valve connector and an anchor. The valve connector comprises a housing, a conduit traversing the housing from an inlet to an outlet; and a retaining element extending outwardly from the housing. The anchor comprises an anchor housing configured to receive a portion of the valve connector. The anchor housing has a gastrostomy feeding tube attachment feature for attaching the anchor to the feeding tube, and a valve connector retaining feature that defines a retaining space, wherein the retaining space receives the retaining element of the valve connector and is sized to enable rotation of the retaining element and the valve connector relative to the anchor such that the conduit of the valve connector maintains fluid connection with the gastrostomy feeding tube during rotation. Additional assemblies and systems are also provided for other medical devices.

Neurosurgical apparatus has a guidance device having a guide tube and a neurosurgical instrument for insertion into the guide tube. The inner surface of the guide tube is arranged, for example profiled, to at least partially engage the outer surface of the neurosurgical instrument when inserted therein. The guide tube thus guides the neurosurgical instrument along a predefined path through the guide tube. At least one of the guidance device and the outer surface of the neurosurgical instrument are configured to provide a fluid return path for carrying any fluid displaced from within the guide tube during insertion of the neurosurgical instrument into the guide tube. A seal may also be provided for sealing the fluid return path.

The invention relates to a vascular access device (10) for implantation onto a vessel wall, the access device comprising an tubular structure (12) to provide an access passage into the vessel via a hole in a vessel wall, a connector arrangement (20; 21) for attaching the tubular structure at said hole in the vessel wall, and a membrane structure (16A; 16B) sufficiently flexible to be collapsed for insertion through said hole and to be expanded to lie at least partially against an inner vessel surface thereby to surround the hole. The membrane structure comprises a membrane aperture (18) to provide a passage from inside the vessel into the tubular structure. The vascular access device further comprises a closing mechanism capable of closing the membrane aperture while the membrane structure is expanded against said inner vessel surface. There is also provided a method of implanting a vascular access device.

Needle assemblies and related methods in which a valve opener is used to push into a valve to open one or more slits on the valve to open the valve. The needle assemblies each includes a needle hub with a needle, a catheter tube with a catheter hub and the valve and valve opener positioned in the interior cavity of the catheter hub. The valve can have a valve skirt and a nose section of the valve opener can locate therein. One or more reliefs can be provided with the valve opener so that an elbow or diagonal section on a needle guard can project from a holding space within the valve opener through the relief.