US 12,114,897 B2
Spinal fixation device with rotatable connector
Stelios Koutsoumbelis, Laurel Hollow, NY (US)
Filed by Stelios Koutsoumbelis, Laurel Hollow, NY (US)
Filed on Mar. 25, 2022, as Appl. No. 17/704,187.
Application 17/704,187 is a continuation of application No. 16/582,069, filed on Sep. 25, 2019, granted, now 11,311,317.
Prior Publication US 2022/0211418 A1, Jul. 7, 2022
Int. Cl. A61B 17/70 (2006.01)
CPC A61B 17/7034 (2013.01) 6 Claims
OG exemplary drawing
 
1. A spinal fixation device for securing stabilizing rods to bone, comprising:
a shaft configured for fastening to bone, the shaft having a longitudinal axis, a proximal end and a distal end;
a first rod coupling head configured to be connected to the proximal end of the shaft and being configured to rotate in a polyaxial manner with respect to the shaft upon connection to the shaft, the first rod coupling head having side walls and a first cavity for receiving a first rod, the cavity being open toward a top of the first rod coupling head, wherein in a neutral position of the first rod coupling head, the first rod coupling head extends symmetrically around the longitudinal axis of the shaft and has a longitudinal axis that is colinear with the longitudinal axis of the shaft; and
a second rod coupling head being rotatably connected at a first end to one of the side walls of the first rod coupling head, around an axis of rotation so as to rotate in a monoaxial manner with respect to the first rod coupling head, and having a second end opposite the first end, and a second cavity between the first end and the second end that is configured for receiving a second rod;
wherein when the first rod coupling head is in the neutral position with the shaft and the first rod coupling head sharing a common longitudinal axis, the axis of rotation is disposed at an angle that is between 70 and 85 degrees from the longitudinal axis of the shaft as measured facing away from the distal end of the shaft, and wherein when the first rod coupling head is in the neutral position, the second end of the second rod coupling head has a height relative to the longitudinal axis that is not greater than a height of the top of the first rod coupling head.