Operating a vessel occlusion catheter
Some systems and methods for operating a vessel occlusion catheter may include a control and inflation device to control the filling of the balloon in such a manner that the vessel wall will not be overstressed while the safe occlusion of the blood vessel is achieved.
1. A control and inflation device for a balloon catheter, comprising a pressure tank for fluid, a dosing unit for dosing of fluid into the pressure tank, a connection for an inflation lumen of the balloon catheter which can be connected with the pressure tank via a control valve, a first pressure measuring device for measuring the fluid pressure prevailing in a balloon of the balloon catheter and a control circuit to which balloon pressure values detected by the first pressure measuring device are fed and which cooperates with the dosing unit for dosing a defined amount of fluid into the pressure tank as a function of the balloon pressure values, wherein the control circuit generates an error message in response to the inflation time being detected below a predetermined lower limit.
2. The control and inflation device of claim 1 , wherein the control circuit cooperates with the control valve such that the control valve is closed if the dosing unit doses fluid into the pressure tank.
3. The control and inflation device of claim 1 , wherein the dosing unit comprises a pump.
4. The control and inflation device of claim 1 , further comprising a second pressure measuring device for measuring the fluid pressure prevailing in the pressure tank, wherein pressure tank values detected by the second pressure measuring device are fed to the control circuit for comparison to a predetermined target value, wherein the control circuit cooperates with the dosing unit such that dosing of fluid into the pressure tank is terminated if the fluid pressure prevailing in the pressure tank reaches the predetermined target value.
5. The control and inflation device of claim 1 , wherein the balloon catheter comprises a coronary sinus occlusion catheter having an inflatable balloon along a distal end portion that is sized to intermittent occlude a coronary sinus of a heart.
6. The control and inflation device of claim 1 , further comprising a second pressure measuring device and a connection to provide in fluid communication between the second pressure measuring device and a central catheter lumen of the balloon catheter that is separate from the inflation lumen of the balloon catheter.
7. The control and inflation device of claim 1 , wherein the balloon of the balloon catheter is filled exclusively due to full pressure equalization between the pressure tank and the balloon when the control valve is arranged in a manner that connects the connection for the inflation lumen with the pressure tank.
8. The control and inflation device of claim 1 , further comprising a vacuum tank, wherein the control valve and a second valve are arranged in a manner that the connection for the inflation lumen is alternately connectable with the vacuum tank and with the pressure tank.
9. The control and inflation device of claim 8 , wherein the pressure tank is alternately connectable with the connection for the inflation lumen and, via the dosing unit, with the vacuum tank.
10. The control and inflation device of claim 8 , wherein the pressure tank, the dosing unit and the vacuum tank form a closed fluid loop together with the inflation lumen of the catheter.
11. The control and inflation device of claim 10 , wherein the closed loop comprises a connection for filling the loop with helium.
12. The control and inflation device of claim 8 , further comprising a condensate pump connected to the vacuum tank.
13. The control and inflation device of claim 8 , wherein the balloon of the balloon catheter is filled exclusively due to full pressure equalization between the pressure tank and the balloon when the control valve and the second valve are arranged in a manner that connects the connection for the inflation lumen with the pressure tank.
14. The control and inflation device of claim 13 , wherein the balloon of the balloon catheter is evacuated exclusively due to full pressure equalization between the vacuum tank and the balloon when the control valve and the second valve are arranged in a manner that connects the connection for the inflation lumen with the vacuum tank.
15. The control and inflation device of claim 13 , wherein an inflation time for filling the balloon is monitored to detect a time required to provide full pressure equalization between the pressure tank and the balloon, and wherein the control circuit generates an error message in response to the inflation time being detected below a lower limit value of 0.2 sec.
16. The control and inflation device of claim 13 , wherein an inflation time for filling the balloon is monitored to detect a time required to provide full pressure equalization between the pressure tank and the balloon, and wherein the control circuit generates an error message in response to the inflation time being detected above an upper limit value of 0.50 sec.
17. The control and inflation device of claim 14 , wherein a deflation time for evacuating the balloon is monitored to detect a time required to provide full pressure equalization between the vacuum tank and the balloon, and wherein the control circuit generates an error message in response to the deflation time being detected below a lower limit value of 0.5 sec.
18. A control and inflation device for a balloon catheter, comprising a pressure tank for fluid, a dosing unit for dosing of fluid into the pressure tank, a connection for an inflation lumen of the balloon catheter which can be connected with the pressure tank via a control valve, a first pressure measuring device for measuring the fluid pressure prevailing in a balloon of the balloon catheter and a control circuit to which balloon pressure values detected by the first pressure measuring device are fed and which cooperates with the dosing unit for dosing a defined amount of fluid into the pressure tank as a function of the balloon pressure values, and further comprising a vacuum tank, wherein the control valve and a second valve are arranged in a manner that the connection for the inflation lumen is alternately connectable with the vacuum tank and with the pressure tank, and wherein the control valve and the second valve are configured to switch the inflation lumen to a connection with the vacuum tank immediately in response to the first pressure measuring device detecting a pressure prevailing in the balloon reaching a value greater than an upper limit selected between 90 and 120 mm Hg; and further comprising a second pressure measuring device for measuring the fluid pressure prevailing in the pressure tank, wherein pressure tank values detected by the second pressure measuring device are fed to the control circuit for comparison to a predetermined target value, wherein the control circuit cooperates with the dosing unit such that dosing of fluid into the pressure tank is terminated if the fluid pressure prevailing in the pressure tank reaches the predetermined target value.
19. The control and inflation device of claim 18 , wherein the control circuit generates an error message in response to the inflation time being detected below a predetermined lower limit or above a predetermined upper limit.