DualKnife™ Device
Model KD-650L/U
Basic specifications
Distal end
Cutting knife length: Extended — 1.5 mm
Retracted — 0.3 mm
Cutting knife diameter: ø0.4 mm (except tip)
Sheath
Outer diameter: ø2.0 mm (max.ø 2.7 mm)
Working length:
KD-650L — 1,950 mm
KD-650U — 2,300 mm
Dual Knife J
KD-655L/U
Case with DualKnife™ Device
For Safer and More Appropriate Use
Information on this page provided by Olympus
Basic Operation of the DualKnife™ Device
The DualKnife™ device can be adjusted in two ways, i.e., it can be retracted or extended depending on the requirement.
When the knife is retracted
The DualKnife™ device can be used for marking and hemostasis. When the slider is pulled all the way, the knife will be withdrawn into the sheath with only 0.3 mm of the tip projecting.
When the knife is extended
The DualKnife™ device can also be used for mucosal incision and submucosal dissection. The knife is extended by 1.5 mm when the slider is pushed completely.
Please note that under some conditions, damage such as melting of the distal end or bending of the knife may occur. In particular, under the circumstances outlined below, an excessive load is likely to be imposed on the knife, increasing the risk that the knife will be damaged.
Conditions that impose a heavy load on the knife and countermeasures
1 When the current is activated while the knife is in contact with the tissue under high-moisture conditions:
Remove moisture from the regions coming in contact with the endotherapy device, including mucus and blood, before activation.
2 When the electrosurgical unit is set to a high-voltage waveform and activation is continued for an extended period:
Reduce the use of high-voltage waveforms to the minimum required level. Keep the activation period as short as possible when using a high-voltage waveform.
| Electrosurgical unit: Voltage intensities of various waveforms |
| Cut / Soft Coagulation < Blend < Coagulation < Spray Coagulation∗2 (e.g., APC mode) |
∗1 Long period of activation using a high-voltage waveform may increase invasion in deep tissue.
∗2 Spray Coagulation mode cannot be used with this instrument.
3 When the knife is subjected to excessive force during removal of tissue attached to the knife:
Be careful not to apply excessive force when removing tissue attached to the knife.
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