摘要:
This disclosure describes various tools and associated methods suitable for gaining access to extravascular spaces. The various tools and associated methods utilize a boring tip that may rotate to aid in safely and effectively crossing diaphragmatic attachments. The boring tip may, in some instances not have any sharp edge. For example, the boring tip may have a dome shape but including at least one surface recessed and offset from a summit of the dome shape. Various mechanisms may be used to control rotation of the boring tip as described herein.
摘要:
A system for facilitating fluid connection between cannulae and a blood pump. The system includes a cannula (52) having a distal end (66) adapted to be in fluid communication with the circulatory system and a proximal end (68) configured to couple to an inlet (82) of the blood pump (54). Further included is a tunneling device (84) configured to be inserted into a body of a patient to direct the proximal end (56) of a cannula (50) adjacent to the inlet (82) and including a connecting structure (90). Further included is a plug (224) which has a first plug part (230) and a second plug part (232). The first plug part (230) includes a connecting structure (92), the connecting structures (90, 92) being selectively engageable. The second plug part (232) is configured to be inserted in the proximal end of the cannula (50). The first and second plug parts (230, 232) are selectively disengageable to allow in situ disconnection between the cannula (50) and tunneling device (84).
摘要:
A method for reducing the level of occluded alkali metal cations from an MSE- framework type molecular sieve comprises either (a) contacting the molecular sieve with a solution containing ammonium ions at a temperature of at least about 50°C to ammonium-exchange at least part of the occluded potassium ions or (b) contacting the molecular sieve with steam at a temperature of at least about 300°C and then subjecting the steamed molecular sieve to ammonium exchange.
摘要:
An ultrasonic device having a tri-axial configuration including an ultrasound transmission member, a dilator, and a sheath is disclosed. The ultrasound device may be used in a procedure to treat an occluded blood vessel. The ultrasound transmission member can transmit ultrasonic energy from an ultrasonic transducer to a distal end. The dilator facilitates entry of the ultrasonic transmission member into the subintimal space of a blood vessel. The sheath may articulate to aid in the process of re-entering the central lumen of the blood vessel.
摘要:
A method for optimizing the stimulation of the dorsal column of the spinal cord is disclosed. The method includes providing a stimulating electrode array and a frame element. The frame element is configured to couple to the stimulating electrode array and guide the stimulating electrode array to a desired position proximate the dorsal column of the spinal cord of a subject.
摘要:
A system for submucosal tunneling an intestinal wall (10) comprises a tunneling head (28) adapted to be inserted between a first layer (15) and an adjacent second layer (29) of the intestinal wall (10), a layer separation assembly (30) with a first layer guide (31) and a second layer guide (32) arranged to diverge the first layer (15) from the second layer (29) when the tunneling head (28) is moved in a forward direction, and an activating mechanism (33) operable to move the tunneling head (28) in the forward direction, thereby separating the first (15) and second layer (29) from each other.
摘要:
A dermatological skin treatment device is provided. The device comprises a handpiece and a cutting tool, wherein the tool is inserted through the conduit and percutaneously inserted into a tissue disposed within a recessed area of the handpiece. The device and method cut the fibrous structures under the skin that cause cellulite at an angle substantially parallel to the surface of the skin and replace these structures with a non-cellulite forming structure by deploying a highly fibrous mesh through a single needle hole to create a highly fibrous layer directly or through wound healing processes.
摘要:
A device for manipulating tissue at a vessel includes an elongated member having a proximal end and a distal end, a guide member at the distal end of the elongated member, the guide member having a blunt distal tip for engagement against an interior wall of the vessel, and a tissue cutting device at the distal end of the elongated member, wherein the tissue cutting device has a sharp tip that is proximal to the blunt distal tip of the guide member.
摘要:
Accessing a spine from a curved postero-lateral approach may include a curved cannula positioned along a curved path from an opening in the skin to a location proximate to the spine. Positioning of the distal end of a radiolucent curved access cannula may be assisted by use of one or more radio-opaque markers. Markers may be positioned to form a cross hair image in fluoroscopy to assist in cannula placement. Radio-opaque inserts placed in and extended beyond the curved access cannula may have radiolucent windows to allow viewing of the cannula's radio-opaque markers. An appropriately placed curved access cannula may be clamped to prevent subsequent movement. Appropriate tools may be introduced through the curved access cannula and the distal radio-opaque tool heads may be viewed relative to the radio-opaque markers. The curved access cannula may be attached to the spine through one or more screws.