Patient-mounted retractors with varying configurations and/or features are provided, along with additional components for use therewith in provided patient-mounted retractor assemblies. Blade type and tube type patient-mounted retractors that may be re-positioned during the course of a procedure are provided in varying configurations and/or geometries suitable for vayring procedures and/or patient anatomies. Applications of re-positionable patient-mounted retractor assemblies are particularly suitable for use in minimally invasive procedures, eliminating the need for table-mounted retraction assemblies and/or cannulas that restrict the operating envrionment.

A cutting balloon catheter including a balloon mounted on a distal portion of a catheter shaft. The balloon includes a cutting member mounted on an exterior surface of the balloon which includes one or more features for providing the cutting member with enhanced flexibility for navigating tortuous anatomy and more closely conforms to the expansion characteristics of the balloon to which the cutting member is mounted.

An access port or retractor tube provides access through tissue to a surgical site or field, such as the brain or spine, in a minimally invasive manner. The access port permits a user to clearly view and access the surgical field, including areas medial thereto, in a minimally invasive manner by dilating or separating tissue rather than cutting tissue. Neuro monitoring and neuro navigation are tools essential to neuro surgery to protect vital and eloquent tissues. Combining navigation and monitoring into the access ports/retractor tubes would enable the surgeon to be more precise and efficient during minimally invasive procedures while still being maximally effective in protecting non operative tissues.

A dilating cannula includes a radially expandable flange and an expandable shaft. The radially expandable flange is disposed at a proximal end portion of the dilating cannula and includes two or more sectors that are each independently movable. The expandable shaft extends from the proximal end portion to a distal end portion of the dilating cannula and defines an inner passageway of the dilating cannula and includes two or more arms. A first branch of the two or more arms extends from one end of the base section and a second branch of the two or more arms extends from another end of the base section. The first branch is connected to a first sector of the two or more sectors of the radially expandable flange and the second branch is connected to a second, different sector of the two or more sectors of the radially expandable flange.

The present invention relates to an improved reusable universal tissue morcellator system. It comprises of a hollow tubed morcellator hand piece locked with flexible rotor cable connected to Motor Drive Unit, having a control panel with a touch screen and manual operating system in the same unit, with inbuilt installation tutorial videos and procedure videos having audio alarms with speed control and activation features using foot pedal or remote control. MDU is addition-ally provided with an external USB port for software and program updating. The cylindrical head of the rotor cable is inserted and locked into the tubular hollow area of the morcellator handle. Morcellator hand piece is having same diameter trocar head (203b), which can be assembled with cannula tube of varying diameter and length, so as to use interchangeable cutter blades of different diameter and length. The trocar head is provided with gas inflow/irrigation inlets.

An implantable medical device (402) includes an attachment member (424) having an aperture (428) with a first diameter. A delivery device (400) includes a catheter shaft (406), a tube (450′) within the shaft, and a tether (422′) within the tube. The tube has a main portion (455′) with a second diameter and an expandable distal end (457′). The tether has a body (423′) and a tether member (426′) having a third diameter greater than the second diameter and smaller than the first diameter. The tether is slideable relative to the tube from a released condition in which the tether member is positioned at least partially distal to the distal end of the tube, and a locked condition in which the tether member is at least partially surrounded by the distal end of the tube. The distal end of the tube can pass through the aperture only in the released condition.

In some aspects, the present disclosure pertains to RF ablation cannulas that comprise: a cannula shaft and a cannula hub that comprises an insertion port that is configured to receive an electrode shaft, a stylet shaft, or both and an injection port comprising a mating feature that is configured to interface with an injection device, and seal that is configured to form a water-tight seal around the shaft when it is inserted through the insertion port. By providing a water-tight seal around the shaft, backflow of pressured fluid around the shaft (e.g., backflow of pressurized fluid that is injected into the injection port) is prevented. Other aspects of the present disclosure pertain to systems that comprise such RF cannulas and to methods of using such systems.

A surgical access device includes a cannula body and a fixation mechanism. The cannula body includes a housing, and an elongated portion extending distally from the housing and defining a longitudinal axis. The fixation mechanism includes a flange, a fixation sleeve, and a proximal sleeve. The flange is rotatable about the longitudinal axis. The fixation sleeve extends distally from the flange and radially surrounds a portion of the elongated portion of the cannula body. The proximal sleeve extends distally from the flange and radially surrounds a proximal portion of the fixation sleeve. Rotation of the flange causes a radially-expandable portion of the fixation sleeve to move between a first position defining a first gap between the radially-expandable portion and the elongated portion, and a second position defining a second, greater, gap between the radially-expandable portion and the elongated portion.

An expandable introducer sheath with an interlock dilator. The present technology provides an expandable sheath with a step feature inside its distal opening, and a dilator with an interlock that includes a catch surface that is configured to engage with the step feature of the expandable sheath. When the step feature engages the catch surface, it resists further relative movement so that the body of the dilator is prevented from exiting the distal end of the expandable sheath. The nature of the interlocking engagement between the step feature and the catch surface allows the dilator to be used to extend and maintain tension on the expandable sheath during insertion into a patient, and then to be retracted from the expandable sheath by simply pulling the dilator in the opposite direction. The present technology also provides a dilator hub with a spring mechanism configured to achieve and maintain a desired tension on the expandable sheath and to prevent overextension of the expandable sheath when the dilator is being inserted into the expandable sheath.

Medical devices for accessing the central nervous system, as well as making and using medical devices, are disclosed. An example medical device may include an expandable access port. The expandable access port may include a housing having a plurality of tines coupled thereto. A thrust washer may be disposed along the housing. An actuation member may be coupled to the housing. The actuation member may be designed to shift the plurality of tines between a first configuration and an expanded configuration.