The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 05, 1990
Filed:
Mar. 28, 1989
Aubrey M Palestrant, Paradise Valley, AZ (US);
Other;
Abstract
A guidance method for use in conjunction with a C.T. scanner allows a user to accurately place a drainage catheter, biopsy needle, or like catheter within a patient's body. A scan of the patient's body is made using the C.T. scanner to form a cross-sectional image of the target area within the patient's body. An insertion path is selected on the scanned cross-sectional image to reach the target area, and the lateral distance is determined between the vertical axis of the scanned image and the insertion site. The insertion angle and insertion distance along the insertion path are also computed from the cross-sectional image. The lighting system of the C.T. scanner projects a laser-generated longitudinal reference beam on to the patient's body corresponding with the vertical axis of the scanned image; the lighting system further projects at least one transverse beam on to the patient's body for designating the vertical plane through which an image was scanned. The insertion site is located by measuring upon the patient's body, along the transverse reference beam, the aforementioned lateral distance, starting from the longitudinal reference beam. The insertion site is marked, and th tip of the catheter is advanced into the insertion site, while maintaining the catheter within the transverse reference beam. The catheter is maintained at the computed insertion angle relative to a horizontal plane, and the catheter is advanced by the computed insertion distance to reach the target area.