Aspiration device, aspiration system, and aspiration method
AssigneeTerumo Kabushiki Kaisha
InventorsShin Maki, Masashi Usami, Shinichi Kaneda
Life of this patent
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Abstract
An aspiration device for aspirating an object in a blood vessel, includes a pump connectable to an aspiration catheter and capable of applying a negative pressure to the aspiration catheter, and a controller configured to: acquire a length of an abnormal part of the blood vessel in which the object exists and an occlusion rate of the abnormal part, select either a first aspiration mode in which the pressure applied to the aspiration catheter is maintained at a certain level or a second aspiration mode in which the pressure is varied, and control the pump to apply the pressure according to the selected aspiration mode.
Claims18
An aspiration device for aspirating an object in a blood vessel, comprising:
- a pump connectable to an aspiration catheter and capable of applying a negative pressure to the aspiration catheter;
- and
- a controller configured to:
- acquire a length of an abnormal part of the blood vessel in which the object exists and an occlusion rate of the abnormal part,
- select either a first aspiration mode in which the pressure applied to the aspiration catheter is maintained at a certain level or a second aspiration mode in which the pressure is varied, and
- control the pump to apply the pressure according to the selected aspiration mode, wherein
- the second aspiration mode includes a low flow rate mode and a high flow rate mode, an aspiration flow rate of the high flow rate mode being higher than that of the low flow rate mode, and
- the controller is further configured to select:
- the high flow rate mode of the second aspiration mode when the length of the abnormal part of the blood vessel is greater than a first threshold and the occlusion rate is equal to or less than a second threshold, and
- the low flow rate mode of the second aspiration mode when the length of the abnormal part of the blood vessel is equal to or less than the first threshold and the occlusion rate is greater than the second threshold.
An aspiration system for aspirating an object in a blood vessel, comprising:
- an aspiration catheter to be inserted into the blood vessel;
- and
- an aspiration device connectable to the aspiration catheter, capable of applying a negative pressure to the aspiration catheter, and configured to:
- acquire a length of an abnormal part of the blood vessel in which the object exists and an occlusion rate of the abnormal part,
- select either a first aspiration mode in which the pressure applied to the aspiration catheter is maintained at a certain level or a second aspiration mode in which the pressure is varied, and
- apply the pressure to the aspiration catheter according to the selected aspiration mode, wherein
- the second aspiration mode includes a low flow rate mode and a high flow rate mode, an aspiration flow rate of the high flow rate mode being higher than that of the low flow rate mode, and
- the aspiration device is further configured to select:
- the high flow rate mode of the second aspiration mode when the length of the abnormal part of the blood vessel is greater than a first threshold and the occlusion rate is equal to or less than a second threshold, and
- the low flow rate mode of the second aspiration mode when the length of the abnormal part of the blood vessel is equal to or less than the first threshold and the occlusion rate is greater than the second threshold.
An aspiration method for aspirating an object in a blood vessel, the method comprising:
- acquiring a length of an abnormal part of a blood vessel in which the object exists and an occlusion rate of the abnormal part;
- selecting either a first aspiration mode in which a negative pressure applied to an aspiration catheter is maintained at a certain level or a second aspiration mode in which the pressure is varied;
- and
- applying the pressure to the aspiration catheter inserted in the blood vessel according to the selected aspiration mode, wherein
- the second aspiration mode includes a low flow rate mode and a high flow rate mode, an aspiration flow rate of the high flow rate mode being higher than that of the low flow rate mode, and
- selecting includes selecting:
- the high flow rate mode of the second aspiration mode when the length of the abnormal part of the blood vessel is greater than a first threshold and the occlusion rate is equal to or less than a second threshold, and
- the low flow rate mode of the second aspiration mode when the length of the abnormal part of the blood vessel is equal to or less than the first threshold and the occlusion rate is greater than the second threshold.
Dependencies are inferred from the claim text.