Abstract:
A network device for dynamically allocating memory locations to plurality of queues. The network device includes means for determining an amount of memory buffers that is associated with a port, for assigning a fixed allocation of memory buffers to each of a plurality of queues associated with the port and for sharing remaining memory buffers among the plurality of queues. The remaining memory buffers are used by each of the plurality of queues after the fixed allocation of memory buffers assigned to the queue is used. The network device also includes means for setting a limit threshold for each of the plurality of queues. The limit threshold determines how much of the remaining memory buffer may be used by each of the plurality of queues. The network device further includes means for defining at least one color threshold for packets including a specified color marking and for defining a virtual maximum threshold. When one of the plurality of queues requests access to the remaining memory buffers and the remaining memory buffers is less than the limit threshold for the queue, the virtual maximum threshold is defined for the queue. The virtual maximum threshold replaces the limit threshold and packets associated with the at least one color threshold are processed in proportion with other color thresholds based on the virtual maximum threshold ceiling.
Abstract:
A gastric pressure relief apparatus for incorporation within an enteral feeding system, including an enteral feeding container, an administrative tube and an enteral feeding tube. The apparatus comprises a gas and liquid-receiving reservoir with a gas vent to ambient atmosphere, a length of tube secured to the reservoir at one end and joined to the enteral feeding tube at another end and connector means for joining the administrative tube to the length of tube to be oriented at a point below that of an enterally-fed patient's stomach. The length of tube includes volumetric indicia to allow for measurement of refluxed fluid and subsequent adjustment of fluid administration.
Abstract:
A stent for reinforcement of the lumen of a peristaltic organ is formed by knitting preferably a nitinol wire into a pattern of overlapping loops selected such that from a relaxed state each row of loops may shift axially relative to and independently of the rows on either side. This local lengthening and shortening accommodate peristalsis of the organ without migrating within the organ. A stent is also shown which comprises two resilient cylindrical mesh layers and a semi-permeable compliant membrane such as expanded polytetrafluoroethylene, sandwiched between. The two mesh layers may be knit of a flexible filament, and the knit may be configured so that the stent can adapt to peristalsis of the body lumen. A method is also shown of manufacturing a delivery system for a resilient tubular device such as a stent so that the device can be inserted into the body in a substantially reduced diameter. The method uses a confining block having a bore and a slot leading into the bore. The tubular device is pinched and inserted into the bore and the slot, two mandrels are inserted into the bore, one inside the device and one outside and the mandrels are revolved about each other to roll the device on itself.
Abstract:
A device for percutaneous administration of fluid preparations into a body cavity, vessel or organ, the device including a tube having both a fluid lumen and an inflation lumen and defined by a proximal end lying outside of the body and a distal end lying within the body, the proximal end of the fluid lumen being in fluid communication with a fluid source and the distal end disposed within the body, the distal end of the inflation lumen in communication with an inflatable member disposed within the body. In one embodiment, one end of the tube is connected to a retention platform having a central portion with a recess to confront the patient's abdominal wall. The retention platform has a plurality of circumferentially-spaced fingers extending radially from said central portion where only the end portion of each finger rests on the abdominal wall of the patient. Preferably, the proximal end of the inflation lumen is remote from the fluid lumen. The device also preferably utilizes a flexible band extending from the retention platform, which carries a plug for sealing the proximal end of the fluid lumen.
Abstract:
The present invention is directed to a pre-formed retention member having an improved construction and used for anchoring or retaining a catheter within a body cavity, organ or vessel. The pre-formed retention retains a distal open end of a single body access tube against an inner body cavity wall of a patient. The pre-formed member is secured to only the inner and outer peripheral edges of the distal open end of the tube by a sleeve. The sleeve has both an outer sleeve surface and an inner sleeve surface which receives, respectively, the outer and inner surfaces of the tube. The pre-formed member includes an outer surface and an inner surface which defines a retention chamber. The retention chamber extends beyond the distal open end of the tube so that no portion of the tube passes through the chamber. When outside forces act upon the pre-formed member, the pre-formed member collapses upon itself, and in a collapsed configuration, the outer diameter of the pre-formed member is no greater than the outer diameter of the tube.
Abstract:
A tubular prosthesis including a tubular wall portion of loosely interlocked pattern, e.g. of knitted loops, constructed to function within a body lumen. The loops are preferably formed of co-knitted strand materials. A first strand material is a metal strand that structurally defines the tubular shape of the prosthesis and maintains the shape when positioned in the lumen. A second strand material is a predetermined substance selected to provide desired characteristics to the wall of the prosthesis.
Abstract:
An apparatus for the in situ generation of an electrical current in a biological environment characterized by including an electrolytic fluid. The apparatus comprises first and second electrodes of differing electrochemical potentials separated by an insulator. The apparatus is adapted to be implanted in the environment. The presence of the electrolytic fluid and formation of a current path by hyperplastic cells bridging the electrodes enables electrolysis to occur and a direct current to pass through the current path to impede hyperplastic cell growth.
Abstract:
An enteric feeding bag having unique fluid dispensation features comprising a supplying chamber within the bag being coupled to an inlet, a feeding chamber of smaller volume than the supplying chamber being coupled to an inlet, a feeding chamber of smaller volume than the supplying chamber being coupled to an outlet, a channel placing the chambers in selective fluid communication upon tilting of the bag, a partition between the chambers having at least one aperture to receive a clamp in which the aperture coincides with volumetric graduations on the feeding chamber, an elongated flap appended to the exterior peripheral edge of the feeding chamber also having at least one aperture horizontally coinciding with the aperture on the partition and, a clamp inserted through the apertures for transversely sealing together the side walls of the feeding chamber at one aperture.