Patent Application
20190060087
The application relates to a cup impactor for inserting for use during orthopedic surgery.
Components may be inserted into a surgical site, such as a bone, during orthopedic surgery. A cup impactor provides a way to hold the component while it is projected into the surgical site.
In one aspect, a cup impactor has a shaft having a distal end, a proximate end, and an intermediate section between the distal end and the proximate end; a cup adapter for a cup may be disposed at the distal end, the cup adapter adapted to detachably retain the cup during a hip replacement operation; a modular plate adapter for a modular plate may be disposed at the proximate end, the modular plate adapter adapted to detachably retain the modular plate during the hip replacement operation, the modular plate adapted to at least one of an impactor, a mallet, a gas or electric-powered hammer, or a robotic arm; and an attachment point for an array of transmitters may be disposed at the intermediate section, the array of transmitters coupled to a receiver, the array of transmitters transmitting location and orientation data of the cup impactor to the receiver.
The above and other features and advantages of the present invention, as well as the structure and operation of various embodiments of the present invention, are described in detail below with reference to the accompanying drawings.
The accompanying drawings, which are incorporated herein and form part of the specification, illustrate various embodiments of the present invention and, together with the description, further serve to explain the principles and to enable a person skilled in the pertinent art to make and use the invention. In the drawings, like reference numbers indicate identical or functionally similar elements. A more complete appreciation and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein:
In several embodiments, the Yellowhammer Cup Impactor provides a more accurate and safer means of placing the acetabular component during total hip replacement while diminishing surgeon fatigue.
Currently, the acetabular component is inserted manually. The cup is temporarily fixed, usually by a screw mechanism to an impaction arm which the surgeon strikes with a mallet. This impaction can require a good deal of force.
Accurate placement of the acetabular component in total hip replacement is a crucial element in avoiding complications during and after total hip replacement. Intra-operative x-rays and computer assisted and robotic acetabular preparations are methods that have been utilized to augment surgical expertise in reproducibly accurate acetabular component placement. The Yellowhammer Cup Impactor would allow real-time assessment of cup placement via an array attached to the impactor providing information to a computer or robot guided system.
Fracture of the pelvis during acetabular component placement is a known potential complication of hip replacement surgery that can lead to a more extensive surgery, increase risk of blood loss, infection and loosening. One of the causes of acetabular fracture could be from the non-uniform forces generated in manual impaction by the surgeon. A gas or electrically powered impaction device either free-standing or as part of a robot system would allow more uniform force to be applied during cup impaction decreasing the risk of fracture and decrease surgeon fatigue which could, in turn, lead to other errors.
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The foregoing has described the principles, embodiments, and modes of operation of the present invention. However, the invention should not be construed as being limited to the particular embodiments described above, as they should be regarded as being illustrative and not restrictive. It should be appreciated that variations may be made in those embodiments by those skilled in the art without departing from the scope of the present invention.
While a preferred embodiment of the present invention has been described above, it should be understood that it has been presented by way of example only, and not limitation. Thus, the breadth and scope of the present invention should not be limited by the above described exemplary embodiment.
Obviously, numerous modifications and variations of the present invention are possible in light of the above teachings. It is therefore to be understood that the invention may be practiced otherwise than as specifically described herein.
