摘要:
In one embodiment, an apparatus includes a projection having a tapered end portion configured to be inserted percutaneously through tissue. A measurement member is coupled to the projection and is configured to indicate a distance between adjacent anatomical structures. In another embodiment, an apparatus includes a measurement member configured to be percutaneously inserted between adjacent anatomical structures. The measurement member includes a wedge portion that is configured to contact the adjacent anatomical structures when the measurement member is moved distally between the adjacent anatomical structures. A size indicator is coupled to the wedge portion. The size indicator has a plurality of markings and is configured to be viewed on an image of the adjacent anatomical structures with the wedge portion of the measurement member disposed between the adjacent anatomical structures to indicate a distance between the adjacent anatomical structures.
摘要:
A balloon for use in compressing cancellous bone and marrow (also known as medullary bone or trabecular bone) against the inner cortex of bones whether the bones are fractured or not. The balloon comprises an inflatable, non-expandable balloon body for insertion into said bone. The body has a shape and size to compress at least a portion of the cancellous bone to form a cavity in the cancellous bone and to restore the original position of the outer cortical bone, if fractured or collapsed. The balloon is prevented from applying excessive pressure to the outer cortical bone. The wall or walls of the balloon are such that proper inflation the balloon body is achieved to provide for optimum compression of all the bone marrow. The balloon is able to be folded so that it can be inserted quickly into a bone. The balloon can be made to have a suction catheter. It can also be coated with therapeutic substances. The main purpose of the balloon is the forming or enlarging of a cavity or passage in a bone, especially in, but not limited to, vertebral bodies. Another important purpose is to deliver therapeutic substances to bone in an improved way.
摘要:
Medical devices and methods for accessing a biological body are disclosed herein. In one embodiment, a method includes inserting a cannula at least partially into a vertebra such that a threaded portion of the cannula secures the cannula to a portion of a cortical bone of the vertebra and forms a channel within the cortical bone. A medical device is inserted at least partially through the cannula such that a distal end portion of the medical device is disposed within a portion of a cancellous bone of the vertebra. A medical procedure is performed within the cancellous bone using the medical device and then the cannula and the medical device are removed from the vertebra, leaving a channel in the vertebra having at least partially threaded interior walls. A bone screw that has threads configured to matingly engage the threaded channel is then inserted into the threaded channel.