An arthroscopic device is used with a hand piece having a motor drive with a rotating drive shaft. An elongate probe extending along a longitudinal axis and includes a proximal hub on a proximal end. The proximal hub detachably couples to the hand piece, and an operable-closeable jaw structure is disposed on a distal end of the elongate probe. A conversion mechanism carried by the hub converts a rotational motion of the motor drive shaft to a longitudinal motion of an actuator member. The actuator member drives the jaw structure between jaw-open and jaw-closed positions to resect bone and other hard tissues.

A power supply unit for a surgical instrument operated by an electric motor includes a battery-receiving housing separate and spaced apart from the surgical instrument. A fastening means or retainer fastens or retains the power supply unit to a body part of an operator. At least one power supply unit supplies power to at least one motor system. A control and monitoring device performs and/or monitors at least one function. A cable connection connects a cable for electrically coupling the power supply unit to a surgical instrument for operating the motor system thereof and/or for transmitting data and/or operating parameters.

Embodiments disclosed herein are directed to an intraosseous access system configured to confirm access to a medullary cavity. The system includes a driver housing, an access system including a drive train, a needle assembly rotatably coupled to the access system, and an aspiration system. The needle assembly can include a needle defining a lumen and an obturator disposed therein. The aspiration system can include a syringe or a vacutainer, coupled to the obturator. Sliding one of a plunger or a vacutainer proximally can withdraw the obturator from the needle lumen and place a vacuum in fluid communication with the needle lumen to draw a fluid flow therethrough. A portion of the aspiration system can rotate along with the needle assembly. Withdrawing the obturator can place the obturator within the syringe or the vacutainer mitigating needle stick injuries. If the medullary cavity has not been accessed, the obturator can be replaced.

Methods and systems of placing a medical fastener at a predetermined depth in a bone are described. A surgical tool can include an attachment assembly configured to interchangeably engage a medical fastener and a cutting element or bone removal tool and a drive assembly coupled to the attachment assembly. The attachment assembly can be configured to automatically release the medical fastener in response to the drive assembly reaching its end or distal-most position to place the medical fastener at a predetermined depth within the bone.

A surgical instrument is provided. The surgical instrument has a drill bit employable in drilling procedures wherein the drill bit is made of a plurality of radially positioned drill bits which also may be utilized as a grasping device. As a result, the drill bit may not only drill into bone, but may also be used to grasp an object, such as a portion of the body. The present surgical instrument reduces contamination which may otherwise result from switching surgical instruments from a drill to a grasping mechanism or from the need to drill multiple holes into the patient's body.

A system and method for improving installation of a prosthesis which may include assembly of a modular prosthesis. Devices include prosthesis installation tools, prosthesis assembly tools, site preparation systems, and improved power tools used in implant site preparation, the tools including a secondary motion that preferably includes an ultrasonic vibration.

Cranial perforator (1) comprising a rotating element (10) capable of being fixed to a driving element, a first drill-head (20) and a second drill-head (30), clutch means (50) disposed on the first drill-head (20) and the rotating element (10) means of disengagement (60) from a engaged position of the first drill-head (20) to an idle position of the first drill-head (20) and a casing (40) fixed at one of its extremities to the rotating element (10) and partly encasing the second drill-head (30).

Disclosed herein is a medical device. The medical device includes a blade tube section, a motor, and a lever arm. The blade tube section includes an outer blade tube, an inner blade tube, and a cutting window at a distal end of the blade tube section. The motor is spaced from the blade tube section. The lever arm is between the inner blade tube and the motor.

A surgical instrument (25), in particular a surgical cutting or drilling instrument, the surgical instrument (25) comprising: a drive unit; a cutting tool or drill bit (5) engageable with the drive unit; a measuring device (1) which is configured to measure the distance [x(t)] covered by the cutting tool or drill bit (5) along a cutting or drilling path with respect to time and relative to a reference position; a processing un and a digital data storage, wherein in the digital data storage reference data are stored which include at least one data set specifying a reference graph G.sub.Ref within a time window (11) in the range of a transition and defining a reference point of a transition (21′), wherein the time window (11) includes a first time period before the reference point of a transition (21′) and a second time period after the reference point of a transition (21′) and wherein the processing unit (14) suitably programmed to compare the recorded graph G with the at least one reference graph G.sub.Ref and to find 1 lion of a transition (21) in the recorded graph G.

A medical device includes an elongated sleeve having a longitudinal axis, a proximal end and a distal end. A ceramic cutting member includes both a cutting window having sharp edges and one or more flutes with cutting burrs circumferentially spaced-apart from the cutting window. An electrode may be placed between a pair of flutes and opposite to the cutting window. A motor drive is coupled to the proximal end of the elongated sleeve to rotate the ceramic cutting member cut bone with the flute(s) and soft tissue with the cutting window. The electrode provides cautery or radiofrequency ablation of tissue when the sleeve and ceramic cutting member are not being rotated.