Radi Medical Systems Ab

Apriomed Ab

Gunnar Åström

Dan Akerfeldt

Håkan Ahlström

Dan Åkerfeldt

The invention relates to a grid () adapted to be arranged on a patient's skin to provide positioning information in CT-guided percutaneous operations. In one embodiment, the grid () comprises a flat and generally rectangular frame having two long sides () and two short sides (), with a number of transverse ribs () being provided between the two long sides (). According to the invention, at least some of the transverse ribs () are elastic. By using his/her fingers, a doctor can thereby separate two neighbouring ribs () such that an opening is provided in the grid (). Through this opening access is obtained to the skin area under the grid (), or the grid () can be threaded over and removed from a medical instrument which, between two adjacent ribs (), is inserted into the patient's body.

Grid for guided operations

A device for puncturing cortical bone. The device consists of a cannula and inside of it an axially movable needle. The distal end of the needle has an eccentrically shaped tip which, by drilling, forms a hole, larger than the outer diameter of the needle, through corticalis, whereupon the enclosing cannula can be inserted into the drilled hole. In this way the cannula's position in the bone is secured and the cannula functions as a fixed anchored guiding channel for further sampling or treatment.

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Uppsala, Sweden

Gunnar Åström