Cortical screw placement with a spinous process clamp guide: a cadaver study accessing accuracy

BMC Surgery

Table 1 Patient demographics and parameters

Patient	Gender	Age (y/o)	BMD T value	Surgical segment	Surgical approach	Screwing time (min)	Radiation dose (μSv)	Radiation time (s)
Patient 1	F	67	− 1.50	L1-S1	Planning + SPC	25	15	12
Patient 2	M	49	− 0.90	L1-S1	Planning + SPC	35	19	16
Patient 3	F	53	− 1.60	L1-S1	Planning + SPC	45	24	16
Patient 4	M	69	− 1.00	L1-S1	Planning + SPC	35	25	28

y/o years old, BMD bone mineral density, min minute, μSv microsievert, s second, F female, M male, SPC Spinous Process Clamp guide. Lumbar segments varied from the first lumbar to the first sacral segment. The values of BMD were measured using dual energy X-ray absorptiometry (DXA)

ISSN: 1471-2482