1. A method of actuating a catheter for extracorporeal circulation, wherein the catheter has distal end and proximal end, the catheter has blood extracting lumen extending from the distal end to the proximal end and blood return lumen extending from the proximal end of the catheter to the fixed length distal end, the blood is extracted from the distal end of the blood extracting lumen arranged in the coronary sinus of patient’s heart and the blood is returned from the blood extracting lumen arranged in the body of a patient into the body of the patient.
2. The method of claim 1, further equipped with that when the minimum sectional area to the circumferential direction of the blood extracting lumen of the catheter for extracorporeal circulation is referred to as S1 and an immersion side length is referred to as L1, an equivalent diameter D1 satisfies the formula defined by D1=(4\xd7S1)L1 and the equivalent diameter D1 is at least 1.80 mm, and when the minimum sectional area to the circumferential direction of the blood return lumen is referred to as S2 and the immersion side length is referred to as L2, an equivalent diameter D2 satisfies the formula defined by D2=(4\xd7S2)L2 and the equivalent diameter D2 is at least 1.30 mm and at most 2.00 mm.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An apparatus comprising:
a hermetically sealed implantable device including at least three leadless electrodes located on a housing of the medical device and a brain port;
a lead having a proximal end configured to connect with the brain port, the lead having a distal end with an electrode configured to deliver stimulation to a patient’s brain;
a processor; and
a computer readable medium in communication with the processor, the computer readable medium comprising executable instructions for causing the processor to perform the following:
enable two of the at least three leadless electrodes for cardiac monitoring based on a post-implantation determination indicating which of the at least three leadless electrodes will be used for cardiac monitoring;
enable one of the at least three leadless electrodes not enabled for cardiac monitoring for acting as an indifferent electrode in monopolar stimulation;
deliver neurostimulation to the patient to treat a neurological condition through the electrode on the distal end of the lead while the one of the at least three leadless electrodes not enabled for cardiac monitoring acts as the indifferent electrode for the neurostimulation; and
monitor for the presence of cardiac events using the two of the at least three leadless electrodes enabled for cardiac monitoring.
2. The apparatus of claim 1 further comprising a cardiac therapy port and a cardiac lead configured to connect with the cardiac therapy port.
3. The apparatus of claim 2 wherein the computer readable medium further comprises executable instructions for causing the processor to select either the cardiac port or the two enabled leadless electrodes for cardiac monitoring.
4. The apparatus of claim 3 wherein the computer readable medium further comprises executable instructions for causing the processor to perform direct cardiac monitoring with the cardiac lead if the cardiac port is selected and, if required, deliver cardiac therapy with the cardiac lead.
5. The apparatus of claim 3 wherein the computer readable medium further comprises executable instructions for causing the processor to perform indirect cardiac monitoring with the two leadless electrodes if the two leadless electrodes are selected, and, if required, deliver cardiac therapy with the cardiac lead.
6. The apparatus of claim 1 wherein the computer readable medium further comprises executable instructions for causing the processor to enable one of the at least three leadless electrodes not enabled for cardiac monitoring for monitoring a brain signal.
7. The apparatus of claim 1 further comprising a second electrode located at the distal end of the lead wherein the electrode and the second electrode are configured to deliver bipolar stimulation.
8. The apparatus of claim 1, wherein the computer readable medium further comprises executable instructions for causing the processor to receive a command indicating which of the at least three leadless electrodes will be used for cardiac monitoring and to enable the two of the at least three leadless electrodes based on the command.
9. The apparatus of claim 1, wherein the neurological condition comprises a seizure disorder.
10. The apparatus of claim 1, wherein the apparatus is configured to deliver the neurostimulation to the patient’s brain.
11. A method comprising:
dividing a plurality of electrodes on the exterior of an implantable housing for use between cardiac monitoring and brain stimulation;
enabling cardiac monitoring from two of the plurality of electrodes based on the division of the plurality of electrodes;
enabling brain stimulation from one of the plurality of electrodes not enabled for cardiac monitoring based on the division of the plurality of electrodes;
monitoring for cardiac events using the two of the plurality of electrodes enabled for cardiac sensing; and
delivering monopolar stimulation to a patient’s brain through an electrode on the distal end of a lead, the lead connected to a brain port of the implantable housing, the one of the plurality of electrodes enabled for brain stimulation acting as an indifferent electrode for the neurostimulation, wherein enabling cardiac monitoring, enabling brain stimulation, monitoring, and delivering are each performed at least in part by a processor.
12. The method of claim 11, wherein the implantable housing further comprises a cardiac therapy port.
13. The method of claim 12, further comprising delivering a cardiac stimulation therapy using an electrode on the distal end of a cardiac lead connected to the cardiac port.
14. The method of claim 12, further comprising:
disabling the cardiac therapy port either before or after implantation of the device;
if no cardiac events that may require therapy are identified, maintaining cardiac monitoring using the cardiac sensing port; and
if a cardiac event that may require cardiac therapy is identified, enabling the cardiac therapy port.
15. The method of claim 11, wherein:
dividing the plurality of electrodes further comprises dividing the electrodes for use between cardiac monitoring and brain monitoring; and
the method further comprises enabling brain monitoring from one of the plurality of electrodes not enabled for cardiac monitoring based on the division of the plurality of electrodes.
16. The method of claim 11 wherein the method further comprises delivering bipolar stimulation between the electrode on the distal end of the lead and a second electrode on the distal end of the lead.
17. A system comprising:
means for dividing a plurality of electrodes on the exterior of an implantable housing for use between cardiac monitoring and brain stimulation;
means for enabling cardiac monitoring from two of the plurality of electrodes based on the division of the plurality of electrodes;
means for enabling brain stimulation from one of the plurality of electrodes not enabled for cardiac monitoring based on the division of the plurality of electrodes;
means for monitoring for cardiac events using the two of the plurality of electrodes enabled for cardiac sensing; and
means for delivering monopolar stimulation to a patient’s brain through an electrode on the distal end of a lead, the lead connected to a brain port of the implantable housing, the one of the plurality of electrodes enabled for brain stimulation acting as an indifferent electrode for the monopolar stimulation.