64 results about "Cannula insertion" patented technology

Embodiments of the invention are directed to systems, methods and devices for sustained medical infusion with controlled rate injection of a liquid into a body. Such a system may include a first separate reusable unit, a second separate depletable unit a third separate disposable unit having a cannula, and may include a fourth separate remote control unit. Emission of appropriate instructions from the fourth unit, when the first unit, the second unit, and the third unit are coupled together in associative operation and disposed on the skin, power is supplied to an engine for generating motion to a fluid transfer system, and when the cannula is inserted in the well and in the body, liquid is transferred from the reservoir to the body, via the tube and the cannula, under control of the controller and transceiver.

An infusion medium delivery system, device and method for delivering an infusion medium to a patient-user, includes a needle inserter device and method for inserting a needle and / or cannula into a patient-user to convey the infusion medium to the patient-user. The needle inserter device and method operate to insert a needle and cannula into a patient-user's skin and automatically withdraw the needle from the patient-user, leaving the cannula in place and in fluid flow communication with a reservoir. The delivery device may include a base portion and a durable portion connectable to the base portion, and wherein the base portion can be separated from the durable portion and disposed of after one or more specified number of uses. The base portion supports the reservoir and the needle inserter device, while the durable portion supports a drive device for selectively driving the infusion medium out of the reservoir and into the needle and / or cannula.

A cannula insertion device includes a housing defining an opening for receiving therethrough a cannula and further defining a channel, and a cannula forming a lumen, the cannula adapted for sliding movement within the housing from a retracted position to an extended position. When the cannula is in the retracted position, the lumen is located remotely from the channel and the channel is in fluidic communication with the opening. When the cannula is in the extended position, the lumen is in fluidic communication with the channel.

An antibacterial fluid may be applied to a tubular medical cannula for access to a patient. The fluid comprises a typically metabolizable antibacterial formulation having a viscosity preferably greater than 150,000 cp. The cannula may then be inserted into the patient with an increased lubricity for a reduction of pain, while at the same time, unlike silicones, preferred materials do not readily accumulate in the patient. The fluid may be placed on the skin. The tubular medical cannula may be a rigid, hollow needle, sharp or blunt, a spike, or a flexible catheter. Also, the viscous antibacterial fluid may be used to lock a catheter or other cannula while implanted in the patient, for storage purposes. The formulation is typically an alcohol plus a viscosity increasing agent and optionally a surfactant, a clotting agent, and / or EDTA.

A system for delivery of therapeutic and / or diagnostic agents into a living body includes a port assembly having a cannula extending from the mounting side, a port opening away from the mounting side and a resilient barrier between the port and the cannula. An access hub includes a connector positionable at the port for opening the resilient barrier. The access hub is movable in the port assembly, is engaged therewith through a resilient ring coupling and forms a seal with the resilient barrier, reducing the amount of volume to be primed. Inserters, both disposable and reusable, include the cannula insertion member as part of the assembly. A spring loaded port driver is operatively mounted within the housing with movement controlled by a latch. The driver includes a seat for receipt of a port assembly. The cannula insertion member is nonremovably fixed in a socket in the port driver in the disposable assembly. In the reusable inserter, the cannula insertion member is slidably mounted within a socket associated with the latch. Slidable movement is limited by locking shoulders. The socket is split and may be splayed to release the cannula insertion member following use.

A cannula insertion device is disclosed. The device includes a needle carriage, a rail device on which the needle carriage is slidable, a yoke having a channel, a linkage connected to the needle carriage and extending into the channel, a torsion spring with one end connected to the linkage, and locking device for locking the torsion spring in tension and maintaining the needle carriage and the linkage in a locked position prior to activation. Upon release of the locking device, the tension of the torsion spring is released, which causes the linkage to move in the channel and slide the needle carriage along the rail device. A catheter carriage may also be provided for actuation by the linkage.

An orthopedic device for implanting between adjacent vertebrae comprising: an arcuate balloon and a hardenable material within said balloon.In some embodiments, the balloon has a footprint that substantially corresponds to a perimeter of a vertebral endplate. An inflatable device is inserted through a cannula into an intervertebral space and oriented so that, upon expansion, a natural angle between vertebrae will be at least partially restored. At least one component selected from the group consisting of a load-bearing component and an osteobiologic component is directed into the inflatable device through a fluid communication means.

A cannula insertion tool having a needle movable between a retracted position and an extended position. In some embodiments, the needle can be retracted within the periphery of a handle of the insertion tool when not in use to protect the needle. When the needle is needed for surgical use, the needle can be extended at least partially beyond the outer periphery of the handle. The needle can be coupled to a slide movable relative to the handle between the retracted position and the extended position. The slide can be secured in each position to prevent unintentional movement of the slide. A cannula can be positioned on the needle when the needle is in the retracted position, and can be retained upon the needle by a member extending toward the cannula.

A fluid delivery cannula which provides an interface between an access point or port site in the body of a patient and a working channel which may receive tools or instruments used during surgical procedures which may be less invasive surgical procedures than traditional open procedures. The cannula allows introduction of fluid(s) into the port site and then into tissue generally at or near that location within the body of the patient. The fluid delivery cannula includes an expandable sleeve that may itself comprise a cannula through which a needle, or trocar assembly is inserted. At least one fluid passageway, is defined, for example, in either the expandable sleeve itself, or defined, by the combination of the needle or trocar assembly and the expandable sleeve. Visual identifiers are used with the fluid delivery cannula to visually distinguish the location of the fluid passageway relative to an adjacent area.

A method for positioning a guide element in a patient and a kit for use in the method. In one embodiment, the method involves transorally inserting an endoscope into a patient's stomach. An incision site is externally indicated by transilluminating the stomach and abdominal walls of the patient from within the stomach. Next, a scalpel incision is made at the indicated incision site, and an access needle is inserted into the incision, the proximal end of the access needle remaining external to the patient and the distal end of the access needle extending into the patient's stomach. The stylet of the access needle is then removed from the patient while keeping the cannula in place. Next, the distal end of a grasping tool is inserted through the cannula and into the patient's stomach. The looped leading end of a pullwire is then inserted through the endoscope and into the stomach. The tool is then manipulated until a distal hook on the tool catches the looped leading end. Next, the tool and the looped leading end are withdrawn from the patient through the cannula. The endoscope is then withdrawn from the patient over the trailing end of the pullwire. In this manner, the pullwire is positioned so that the trailing end of the pullwire extends from the patient's mouth and the leading end of the pullwire extends from the incision.

An insulin infusion device (1A) is disclosed. The device includes a body (3A), cannula (70) housed in the body (1A), a cannula insertion device (10, 20, 23) and a cannula retraction device (20, 23, 30). When the cannula insertion device is activated, the cannula (70) extends at least partly out of the body (1A) and into an infusion site and when the cannula retraction device is activated after the cannula insertion device has been activated, the cannula (70) retracts into the body (1A).

A method and apparatus are disclosed for improving accuracy of placement of a cannula during delivery of electrical energy proximate to bodily tissue, e.g. neural structures. The apparatus optionally includes a cannula operable to deliver electrical current where a portion of the cannula is electrically insulated and a portion of the cannula is exposed and electrically conductive. The cannula further includes a radiopaque marker to identify a specific portion of the cannula, for example to differentiate the electrically insulated region from the electrically exposed region, by allowing it to be more clearly delineated using fluoroscopy or other radiographic imaging techniques. The radiopaque marker is optionally tapered in order to reduce the force required to insert a cannula comprising a radiopaque marker into the patient's body.

Devices and methods for tissue transfer are described where a cannula may be inserted into the breast of a subject at one of several points of entry. Insertion of the cannula into the breast may be accomplished by using a guidance system to distinguish between tissue types. Once desirably positioned, the cannula may be withdrawn from the breast while automatically (or manually) injecting the fat in multiple deposits of adipose tissue or fat such that the deposited fat remains within the tract formed by the withdrawn cannula. Multiple tracts of the deposited fat may be injected within the breast until the breast has been desirably remodeled and / or augmented.

A cannula insertion tool having a needle movable between a retracted position and an extended position. In some embodiments, the needle can be retracted within the periphery of a handle of the insertion tool when not in use to protect the needle. When the needle is needed for surgical use, the needle can be extended at least partially beyond the outer periphery of the handle. The needle can be coupled to a slide movable relative to the handle between the retracted position and the extended position. The slide can be secured in each position to prevent unintentional movement of the slide. A cannula can be positioned on the needle when the needle is in the retracted position, and can be retained upon the needle by a member extending toward the cannula.

A cannula insertion device comprises an elongate frame (4) and a hub (5) mounted to the frame and arranged to be slidably moveable from a first position forwards along a longitudinal axis to a second position relative to the frame and a needle (11) projecting forwards from the hub and carrying a detachable cannula (2) assembly including a cannula. The frame and hub are arranged to allow the hub to be moved forwards from the first position to the second position so as to insert the cannula into a patient and to be drawn backwards to a withdrawn position. The needle is shielded by the frame when the hub is in the first position and also when in the withdrawn position.

A cannula having a body, a sealing disc, and a cap. The sealing disc is located within the body and is compressed by the cap. An angled cut in the sealing disc allows microsurgical instruments to be inserted through the cannula into the eye. Upon removal, the cut in the sealing disc closes, preventing the loss of intraocular pressure.

A blood vessel compression device including a C-shaped spring and a clamp at an end of the spring to compress a blood vessel. The clamp may have a flat shaped cross section or spatulate cross section with an edge where the edge confronts a blood vessel to compress it. The clamp may have a channel and a sac inflatable with air to compress the blood vessel. The device may be positioned on body to clamp an external jugular vein or cephalic vein for cannula insertion. The C-shaped spring may be spaced from a front of the neck to not compress a windpipe of the neck.

An apparatus, system, and method for assisting a heart in circulating blood that has been damaged, for example, by a myocardial infarction. In at least one aspect, an apparatus, system, and method are used for inserting a single cannula assembly comprising at least an inner and outer cannula into the left ventricle, advancing the inner cannula portion of the cannula assembly past the aortic valve, and into the aorta without requiring a secondary cannula insertion through an external portion of the aorta. In another aspect, an intraventricular assistant device (IVAD) having a motor and impeller can be inserted directly into the heart, such as in the left ventricle. The IVAD uniquely provides a pump within the heart through a single insertion that can reduce thrombosis and lessen the complexities typically associated with such efforts.

A device for filling a medicament delivery device (e.g., a patch pump) with medicament or fluid and inserting a cannula subcutaneously enables improved results and user safety, while simplifying the set up process for a user. The device can include a housing with a first chamber portion having a first deployment mechanism and a second chamber portion having a second deployment mechanism. The device can also include a trigger mounted to the housing to activate at least one of the first deployment mechanism and the second deployment mechanism and an interface adapted to mate releasably with the medicament delivery device. The filling of the device with medicament and the insertion of the cannula may occur sequentially or simultaneously, and both actions can be initiated by a single user step or a limited number of user steps, as compared to conventional approaches.

Dilating trocar (40) (see FIG. 14) comprises cannula (42) containing carrier (51) with pivotable dilating members (49, 50) of small transversal dimensions protruding distally of the cannula. Obturator (63) is housed inside the carrier and has sharp element (70) with underspringed protective shield (71) protrudind distally of the dilating members. After inserting the closed dilating members into a small opening primary made in patient's body cavity wall (60) by sharp element (70), user removes the obturator, introduces an actuating rod into carrier (51) and forces apart the dilating members rotating them about axes (52, 53) and thereby stretching the primary opening to provide the cannula insertion therein. Finally, user removes the actuating rod, carrier and dilating members from cannula (42) remaining the cannula in patient's body.