optical fiber

The optical fiber is checked. Before the optical fiber is placed, it is inserted in an 18-gauge needle mounted by a side-arm fitting to measure the appropriate length of the fiber. The distal part of the optical fiber should extend 5 mm beyond the needle tip. The proper length of the fiber is indicated with sterile strip to avoid excessive advancement of the fiber ( placement 1 ). After removal of the stylet of the 18-gauge needle, the optical fiber is inserted into the disk ( placement 2,3,4 ). The distal part of the optical fiber should extend 5 mm beyond the needle tip .

Fig 24: optical fiber check

Fig 25: optical fiber placement 1

Fig 26: optical fiber placement 2

Fig 27: optical fiber placement 3