253results about How to "Adequate flow" patented technology

Apparatus & methods for optimizing anchoring force are described herein. In securing tissue folds, over-compression of the tissue directly underlying the anchors is avoided by utilizing tissue anchors having expandable arms configured to minimize contact area between the anchor and tissue. When the anchor is in its expanded configuration, a load is applied to the anchor until it is optimally configured to accommodate a range of deflections while the anchor itself exerts a substantially constant force against the tissue. Various devices, e.g., stops, spring members, fuses, strain gauges, etc., can be used to indicate when the anchor has been deflected to a predetermined level within the optimal range. Moreover, other factors to affect the anchor characteristics include, e.g., varying the number of arms or struts of the anchor, positioning of the arms, configuration of the arms, the length of the collars, etc.

Apparatus & methods for optimizing anchoring force are described herein. In securing tissue folds, over-compression of the tissue directly underlying the anchors is avoided by utilizing tissue anchors having expandable arms configured to minimize contact area between the anchor and tissue. When the anchor is in its expanded configuration, a load is applied to the anchor until it is optimally configured to accommodate a range of deflections while the anchor itself exerts a substantially constant force against the tissue. Various devices, e.g., stops, spring members, fuses, strain gauges, etc., can be used to indicate when the anchor has been deflected to a predetermined level within the optimal range. Moreover, other factors to affect the anchor characteristics include, e.g., varying the number of arms or struts of the anchor, positioning of the arms, configuration of the arms, the length of the collars, etc.

A beverage forming apparatus includes a storage tank, and a centrifugal pump having an inlet connected to the storage tank by a supply conduit. The centrifugal pump may include a priming vent located below a full level of the storage tank and permit air to vent as liquid primes the pump. A metering tank may have an inlet connected to the centrifugal pump by a pump conduit, and an outlet connected to a brew chamber that forms a beverage using liquid received from the metering tank. In one embodiment, a flow control valve, such as a check valve, may be provided in the pump conduit to allow flow from the pump to the metering tank, but resist flow in reverse. In another embodiment, a vent valve in the pump conduit may be arranged to vent at least a portion of the pump conduit, e.g., to ambient air pressure.

Transurethral systems and methods for delivering electrical energy and controlled, mild heating to a prostate tissue of a patient for destruction of cancerous and / or hyperplastic tissue. A method includes positioning an elongate urethral probe having an expandable member with electrode elements at a target location in the patient's urethra, and inflating or expanding at the target location. Secondary electrodes are positioned within or adjacent to the prostate tissue and spaced from the electrode elements of the expandable member, and an alternating electrical current flow is established between the electrode elements of the expandable member and the one or more secondary electrodes. Current delivery can be selected so as to destroy or ablate cancerous cells of the prostate tissue.

A semiconductor chip module uses a silicone adhesive between the semiconductor chip and a cap, said adhesive having sufficient bond strength to secure said cap to said chip without additional mechanical constraint while providing a direct thermally conductive path and permitting sufficient heat flow from said chip to said cap to maintain steady state operation of said semiconductor chip. The preferred silicone adhesive comprises a primerless, two-part polysiloxane-based adhesive made by reacting polydimethyl siloxane, an organosilicon compound, a polysiloxane, and a silane, in the presence of a catalyst.

The method and system are for sealing / unsealing (regulating) airway leaks occurring between the ventilator circuit and respiratory airways during lung ventilatory support in response to myoelectrical activity of diaphragm. Myolectrical activity of a patient's respiratory-related muscle is sensed to detect respiratory effort, and to produce a myoelectrical signal representative of the sensed muscle myoelectrical activity. Respiratory flow and pressure can also be measured to produce respective respiratory pressure and respiratory flow signals. A logic trigger sealing / unsealing of airway leaks in relation to the myoelectrical signal, respiratory flow signal and / or respiratory pressure signal to assist respiration of the patient. The amplitude of the myoelectrical signal is compared to a given threshold, and airway leaks are sealed when the amplitude of the myoelectrical signal is higher than this threshold. Increment of myoelectrical signal amplitude can be also detected to trigger the airway leak regulating device to seal the airway leaks, while decrement of the myoelectrical signal amplitude can be detected to unseal the airway leaks and thus permit air evacuation from the patient's lungs.

An endoscopic instrument has a portion having an outer surface with a non-circular cross-sectional shape. The non-circular cross-sectional shape may be provided to the instrument by providing peripheral projections or fins along the length of the portion or by providing the periphery of the portion with a polygonal shape. Where fins are used, the fins are preferably quite small and only have a minimal effect on the fluid flow cross sectional area between the interior of the working channel and the endoscopic instrument. The resulting instrument has significantly reduced backlash while maintaining adequate fluid flow in the working channel. According to a second embodiment of the invention, a portion of the interior of the working channel of the endoscope has an interior surface having a non-circular cross sectional shape by the inclusion of a plurality of radially spaced and inwardly directed ribs or by being polygonally shaped. The resulting endoscope reduces the backlash of an endoscopic instrument inserted therein while maintaining adequate fluid flow in the working channel.