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7.12 Stand settings (F20)
7.12.1 Releasing the swing arm
WARNING
Risk of injury due to downward movement of the surgical
microscope!
Never change the accessories or attempt to rebalance
X
the microscope while it is above the field of operation.
After re-equipping, always rebalance the microscope on
X
the swing arm.
Hold the microscope firmly.
X
Pull the stop lever (1) and turn it into a vertical position.
X
The swing arm is now released.
3
1
7.12.2 Balancing the swing arm
See whether or not the microscope drifts.
X
Microscope drifts downwards:
Turn rotary knob (2) clockwise.
X
Microscope drifts upwards:
Turn rotary knob (2) counterclockwise.
X
7.12.3 Adjust the articulation brakes
All joints on the microscope and stand are equipped with
articulation brakes, with resistance that adjusts to make the joint
easier or more difficult to move.
Make the joint easier to move:
Loosen the black brake knob (3).
X
Make the joint more difficult to move:
Tighten the black brake knob (3).
X
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2
M844 / Ref. 10 713 294 / Version 01
7.12.4 Locking the swing arm
WARNING
Risk of injury due to downward movement of the surgical
microscope!
Always lock the swing arm:
X
• when transporting the microscope
• when re-equipping.
Position the swing arm approximately horizontally.
X
Turn the stop lever into a horizontal position.
X
Move the swing arm up and down until the stop lever engages.
X
The swing arm is now locked.
7.13 Positioning at the operating table
WARNING
Risk of injury due to downward movement of the surgical
microscope.
Complete all preparations and adjustments to the stand
X
before the operation.
Never change the accessories or attempt to rebalance
X
the microscope while it is above the field of operation.
Before changing accessories, always lock the M844.
X
Balance the M844 after re-equipping it.
X
Do not release the brakes when the instrument is in an
X
unbalanced state.
Before re-equipping during the operation, first swing
X
the microscope away from the operating field.
Never carry out the balancing above the patient.
X
See safety notes in user manual.
X
Don't use the down / up movement of ceiling mount
X
when the microscope is over the patient.
CAUTION
Damage to the M844 surgical microscope due to
uncontrolled tilting.
Hold the handle when releasing the brake.
X
The M844 can be positioned easily on the operating table and
offers a variety of possibilities for operations on the head or spinal
column.
The M844 achieves this large range of positions through its very
long and high arm system.
Move the Leica M844 F40 and Leica M844 F20 surgical
X
microscopes into the transport position (see chapter 7.1).
Release the footbrakes (see chapter 7.1).
X
Move the M844 surgical microscope carefully over to the
X
operating table by the hand rail and into the required position
for the operation.
Preparation before surgery
39
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