DAVID S CHANG, M.D.
Medical Practice at Solano Ave, Berkeley, CA
License number
California A87115
Category
Medical Practice
Type
Orthopaedic Surgery
License number
California A87115
Category
Medical Practice
Type
Sports Medicine
Address
Address
1569 Solano Ave STE 336, Berkeley, CA 94707
Phone
(510) 834-2276
(510) 834-2202 (Fax)
(510) 834-2202 (Fax)
Professional information
Surgical Retractor
US Patent:
6663562, Dec 16, 2003
Filed:
Sep 14, 2001
Appl. No.:
09/953093
Inventors:
David Chang - Albany CA 94706
International Classification:
A61B 1700
US Classification:
600219, 600213
Abstract:
A surgical retractor comprises a pair of arms having a common pivotal connection and a pair of retractor blades, each blade detachably connected to an arm by a rotating knee joint which allows the retractor blade to rotate about an axis parallel to the arm and also about an axis perpendicular to the arm. A detent locking mechanism allows any selected pair of a plurality of pairs of retractor blades to be detachably attached to the arms. The knee joint comprises an open sleeve for easy sanitizing. The arms are opened and closed using handles having a locking ratchet mechanism and pawl allowing the arms to be locked in any open position.