PMC4628177_01
A 65-year-old man in prone position for osteoplastic laminotomy before (A) and after (B) draping. Lateral (C) and oblique (D) views of his position are monitored continuously during surgery, which can be changed by pushing a function key. Yellow circles (indicated by yellow arrows) show head position, and red circles (indicated by red arrows) show heart position. Green arrow indicates reference position reproduced from the data obtained from the record of a former similar operation.
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F2
A 54-year-old man was operated in prone position for cervical laminoplasty (Fig. 2a). After draping, almost no information about patient position can be obtained (Fig. 2b). With this monitoring system, lateral and oblique views of his position were obtained intra-operatively (compare Fig. 2c with 2d) while head and heart positions were regularly assessed.
PMC4628177_02
A: A 43-year-old man in sitting position for a posterior fossa tumor (case 2). B: Numerical position data are demonstrated by a computer connected to the table. Each abbreviation in B is described as follows. Table up/down: height (mm) of table top, Trend: the angle (degree) of table top for longitudinal direction, Tilt: the angle (degree) of table top for transverse direction, Back: the angle (degree) of back section, Y-axis: the length (mm) of table-sliding for rostro-caudal direction, X-axis: the length (mm) of table sliding for right-left direction, and Leg: the angle (degree) of the leg section. Monitoring of the table was performed throughout the operation, displayed as line chart (a part of early phase of this case including the position setting is displayed as line chart in C). The color of each line is matched to that of the position data respectively. D: A representative diagram showing the front and lateral views of the table. Green arrows: reference position, red arrows: heart position, yellow arrows: head position.
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F3
A 43-year-old man was operated for posterior fossa huge hemangioblastoma in sitting position (Fig. 3a). Various body positions were displayed numerically (Fig. 3b) or in schematic images (Fig. 3d). Monitoring of the table was performed throughout the operation and displayed as a line chart (a part of the line chart is shown in Fig. 3c).
PMC4628177_03
Monitoring during sitting position for paramedian supra-cerebellar approach to a pineal region tumor. Data registration was used in the second operation to improve the position by reducing height difference between head and heart and eliminating air emboli during the surgery. Green position: the position at the first operation, red dot: heart position, yellow dot: head position.
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F4
At the first stage, the height difference between head and heart was 31 cm, and small amount of air emboli was detected during craniotomy procedure (Fig. 4, the position is depicted in green color).