Safety Notes
General Information
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• The nominal pressure can be preset to a range of 15 to 90 mmHg.
• The nominal flow can be preset to a range of 0.025 to 0.5 l/min.
• The devices feature an instrument recognition function.
• The pump reacts to pressures greater than the set nominal pressure by emit-
ting warnings. The devices have safety thresholds.
3.5 Pressure Measuring and Regulating
Contact-free pressure measurementThe devices operate with a completely non-contact pressure measurement of the
irrigation medium. The contact-free pressure measurement is taken by integrat-
ing the pressure chamber into the tube system. The pressure membrane trans-
fers the tube pressure to the electronics of the device via a pressure sensor. The
pressure control circuit continuously compares the actual pressure with the
nominal pressure. The function of the device is to maintain the nominal pressure.
The nominal pressure cannot be reached if the nominal flow is set too low. Check
for possible leaks.
3.6 General Distention Warnings
WARNING!
When performing monopolar electrosurgery, the distension medium must be
electrically non-conductive. Examples include glycine, sorbitol and mannitol.
Isotonic saline irrigation fluids may only be used when performing bipolar elec-
trosurgical resective procedures.
WARNING!
In order to allow proper dilation of the body cavity and to reduce forces that
could introduce irrigation fluid, room air, and gas into the bloodstream, the in-
tracavitary pressure should be kept as low as possible.
WARNING!
Fluid Overload
There is a risk of irrigation fluid reaching the circulatory system of the patient's
soft tissue. This can be affected by distention pressure, flow rate, perforation of
the distended body cavity and duration of the endoscopic surgery. It is critical to
closely monitor the input and outflow of the distending liquid at all times.
WARNING!
Serum sodium concentration
It is also necessary to monitor the concentration of sodium in the blood of the pa-
tient to prevent electrolyte imbalances. Monitoring of the concentration of sodi-
um in the blood must be performed by the physician and is not performed or
supported by the system.
WARNING!
Hypothermia (monitoring body temperature)
The continuous flow of the distension liquid may lower the body temperature of
the patient. Lower body temperatures can cause coronary and cardiovascular
problems. Always monitor the patient's body temperature during the entire sur-
gical procedure. Make especially sure that the following, hypothermia promot-
ing, operation conditions are avoided as best as possible:
• longer operating times
• use of cold irrigation fluid.
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