A surgical system for use in establishing and maintaining an opening to an anatomical space of a body, the system comprising an obturator assembly having a cutting portion at a distal end and a cannula, the cannula being detachably coupled to the cutting portion and deployable into the anatomical space of a patient, the cannula comprises a locking portion, and a lengthwise extendable body; a valve assembly comprising a passage for receiving the cannula, a first end for coupling to a fluid extraction device and a second end for placement external and adjacent the anatomical space; a base comprising a plate for placement on a patient external and adjacent the anatomical space, the plate has an aperture configured for receiving the obturator assembly and coupling means located about the aperture for coupling with the valve assembly; and wherein, in use, the locking portion of the cannula is configured to be retained in the valve assembly with the extendable body extended into the anatomical space to facilitate a path for fluid extraction, and wherein the cannula comprises means for retaining the cannula in its extended state.

A cannula assembly having a retractable cannula tip for use in ophthalmic surgical procedures is disclosed. The apparatus may include a housing having a valve bay disposed between its proximal and distal ends, and a cannula assembly, including an inner and outer tube, that extends from the distal end of the housing. The inner tube may include an elongated portion with a cannula tip at its distal end. The apparatus may further include a valve disposed in the valve bay of the housing. The valve may comprise a valve tubular for adjusting flow through the inner tube, and an actuator for moving the cannula tip from an extended position to a retracted position in the outer tube. The valve tubular may provide a biasing force to the inner tube in the retracted position to move the inner tube back to the extended position upon release of the actuator.

A surgical tool for eye surgery that utilizes a stiffening sleeve and employs a needle of extendible reach. The reach off the needle into the eye is dynamically adjustable by forcible interaction between the stiffening sleeve and a cannula at an outer location of a patient's eye. An end of the tool may retract to facilitate extension of the needle for added reach. Additionally, the sleeve may be further independently retracted for even greater reach of the needle implement toward a surgical site within the eye of the patient.

A delivery endcap assembly is adapted for use with a biliary access device and is adapted to permit a medical device to be delivered through the biliary access device. The delivery endcap assembly includes a securement portion adapted to be releasably securable to a proximal end of the handle after the one or more removable components have been removed from the handle, a tapered portion extending proximally from the securement portion, a rotation hub adapted to be coupled to the securement portion, a valve adapted to be coupled to the rotation hub and a lumen extending through the delivery endcap assembly, wherein the lumen extending through the delivery endcap assembly is adapted to permit a medical device within an introducer sheath to be advanced through the biliary access device.

A system can include an elongated instrument that is positioned within a cannula portion of a cannula assembly. The system can include a shield that is coupled with both the elongated instrument and the cannula assembly when in an unlocked state. The shield can permit proximal movement of the elongated instrument relative thereto when in the unlocked state. The shield can automatically transition to a locked state to attach to a distal end of the elongated instrument to restrict access to a distal tip of the elongated instrument.

A needle or stylet has a tip contour with a reverse back bevel curved toward the longitudinal axis of the needle or stylet. The needle has a flexible intermediate portion and/or a two-part construction in which a distal portion of the needle to crimped onto a proximal portion of the needle. The needle or a stylet is combined with a spring mechanism in the hub of the needle or stylet assembly. The spring mechanism positions the tip of the needle or stylet in a middle position extending from the distal end of the assembly, allows the needle or stylet to be moved into a spring loaded fully retracted configuration within the assembly as the septal wall is tented, and then releasing the spring loaded needle or stylet as the needle or stylet penetrates the septal wall. A method of using a needle or stylet with a spring mechanism is included.

An on-body insertion system is described. The on-body system includes a sensor in a first position being substantially parallel to an insertion surface. Activation of an actuator transitions the sensor to a second position. Wherein the transition imparts movement to the sensor that is substantially parallel to the insertion surface and the second position results in the sensing area being beneath the insertion surface.

A surgical cutting instrument comprises a handle portion and an elongate shaft. The shaft has a distal end and a proximal end and a longitudinal axis extending therebetween, and a cutting element is mounted at the distal end. The instrument further comprises a safety sleeve which includes a substantially cylindrical channel through which the elongate shaft extends. The safety sleeve is moveable axially along the shaft between the proximal end and the distal end of the shaft. The instrument further comprises locking means for preventing further axial movement of the safety sleeve with respect to the elongate shaft when the safety sleeve is in the extended position. The locking means comprises first and second cooperating elements each located on a respective one of the distal end of the shaft and the safety sleeve. A method for using the cutting instrument is also provided.

A surgical instrument for piercing into a human or animal body. The instrument includes an inner portion which is movably arranged within an needle-like outer portion. The outer portion connects to the inner portion through a spring so as to provide with the outer portion during use a load on the inner portion. The outer portion includes a proximal sleeve that provides a finger grip to a person, likely a surgeon. The sleeve is releasably connectable to the outer portion and the instrument includes a release mechanism for releasing the sleeve from the outer portion, which release mechanism is actuable by motion of the inner portion.

A puncture needle includes: an outer needle including a lumen extending in an axial direction; an outer needle hub joined to a proximal end portion of the outer needle; an inner needle located in the lumen of the outer needle; a switching mechanism configured to switch between a first state in which a needle tip of the puncture needle is sharp and a second state in which the needle tip of the puncture needle is blunt by displacing the inner needle in the axial direction; and a lock mechanism that maintains a position of the inner needle.