Systems and methods for a bodily fluid drainage system
Systems and methods are provided for a bodily fluid management system for pumping bodily fluid such as lymph. The bodily fluid management system may include an implantable pump with a rotor having a magnetic portion and inlet and outlet tubes that connect to a fluid chamber. The fluid chamber has a volume that can be selectively reduced or increased via the rotor. The rotor is designed to periodically open and close kinking valves at each of the inlet and outlet tube to permit bodily fluid to enter the fluid chamber during an intake cycle and exit the fluid chamber during a discharge cycle. The magnetic portion of the rotor may be caused to rotate by an external controller that is positioned outside of the body and adjacent to the pump. The external controller may have a magnet that magnetically interfaces with the rotor to cause the rotor to rotate.
1. A lymphatic drainage system for lymphatic fluid management in a patient, the lymphatic drainage system comprising an implantable pump comprising:
a housing configured to be implanted within the patient;
an inlet tube configured to be in fluid communication with a first bodily portion to receive bodily fluid;
an outlet tube configured to be in fluid communication with a second bodily portion;
a fluid chamber disposed within the housing and configured to be in fluid communication with the inlet tube and the outlet tube;
a rotor disposed within the housing and configured to rotate to change a volume of the fluid chamber; and
a first membrane defining a wall of the fluid chamber, the first membrane configured to stretch responsive to rotation of the rotor to reduce the volume of the fluid chamber towards a closed position such that the bodily fluid is pumped from the first bodily portion towards the second bodily portion via the inlet tube, the fluid chamber, and the outlet tube,
wherein the first membrane is configured to be positioned at least partially around the rotor.
2. The lymphatic drainage system of claim 1 , further comprising a second membrane defining a second wall of the fluid chamber, wherein the first membrane and the second membrane are hermetically sealed to form the fluid chamber.
3. The lymphatic drainage system of claim 2 , wherein the second membrane does not change shape responsive to rotation of the rotor.
4. The lymphatic drainage system of claim 2 , further comprising a rigid shell, wherein the second membrane is coupled to the rigid shell and is restrained from moving by the rigid shell.
5. The lymphatic drainage system of claim 2 , wherein the fluid chamber is configured to receive the bodily fluid from the inlet tube and wherein the bodily fluid is contained between the first membrane and the second membrane.
6. The lymphatic drainage system of claim 1 , further comprising a catheter comprising a first end positioned in the first bodily portion and a second end coupled to the inlet tube.
7. The lymphatic drainage system of claim 6 , wherein the catheter comprises a plurality of lumens, each lumen having a different length.
8. The lymphatic drainage system of claim 7 , wherein each lumen of the plurality of lumens comprises an opening and each respective opening is axially displaced along the catheter from each other opening of the plurality of lumens.
9. The lymphatic drainage system of claim 7 , wherein each lumen of the plurality of lumens comprises an opening and each respective opening is radially displaced along the catheter from each other opening of the plurality of lumens.
10. The lymphatic drainage system of claim 7 , wherein each lumen of the plurality of lumens converges into an outlet lumen of the catheter.
11. The lymphatic drainage system of claim 6 , wherein the inlet tube, the catheter, the outlet tube, and the first membrane are all made of the same material.
12. The lymphatic drainage system of claim 11 , wherein the material comprises a silicone elastomer coated with covalent heparin, and
wherein the bodily fluid only contacts the material when using the implantable pump.
13. The lymphatic drainage system of claim 1 , further comprising a piston configured to interface with the rotor, wherein the rotor causes piston to transition between a first position and a second position.
14. The lymphatic drainage system of claim 13 , wherein the piston is configured to interface with the first membrane and wherein the first membrane is caused to stretch as the piston transitions between the first position and the second position.
15. The lymphatic drainage system of claim 1 , further comprising a lever in mechanical communication with the rotor and configured to move between an open position and a closed position responsive to rotation of the rotor to cause the inlet tube to periodically kink such that the bodily fluid is pumped from the first bodily portion towards the second bodily portion via the inlet tube, the fluid chamber, and the outlet tube.
16. A method for pumping lymphatic fluid in a patient, the method comprising:
implanting an implantable pump comprising a housing, an inlet tube, a fluid chamber comprising a first membrane defining a wall of the fluid chamber, an outlet tube, and a rotor;
causing the rotor to rotate to cause the rotor to transition between an intake position and a discharge position to change a volume of the fluid chamber to cause a bodily from a first bodily portion to move from the inlet tube to the outlet tube;
wherein the first membrane is configured to stretch responsive to rotor to reduce the volume of the fluid chamber such that bodily fluid is pumped from the first bodily portion via the inlet tube into the fluid chamber and out to a second bodily portion via the outlet tube, the inlet tube in fluid communication with the first bodily portion and the fluid chamber and the outlet tube in fluid communication with the second bodily portion and the fluid chamber, and
wherein the first membrane is configured to be positioned at least partially around the rotor.
17. The method of claim 16 , wherein the implantable pump further comprises a second membrane that defines a second wall of the fluid chamber, wherein the first membrane and the second membrane are hermetically sealed to form the fluid chamber.
18. The method of claim 17 , wherein the second membrane does not change shape responsive to rotation of the rotor.
19. The method of claim 17 , wherein the implantable pump further comprises a rigid shell and wherein the second membrane is coupled to the rigid shell and is restrained from moving by the rigid shell.
20. The method of claim 16 , further comprising causing the rotor to transition from the discharge position to the intake position to change the volume of the fluid chamber to cause bodily fluid from the first bodily portion to move from the inlet tube to the fluid chamber.
21. The method of claim 16 , wherein the inlet tube is coupled to a catheter comprising a first end positioned in the first bodily portion and a second end coupled to the inlet tube.
22. The method of claim 21 , wherein the catheter comprises a plurality of lumens, each lumen having a different length.
23. The method of claim 22 , wherein each lumen of the plurality of lumens comprises an opening and each respective opening is axially displaced along the catheter from each other opening of the plurality of lumens.
24. The method of claim 22 , wherein each lumen of the plurality of lumens comprises an opening and each respective opening is radially displaced along the catheter from each other opening of the plurality of lumens.
25. The method of claim 22 , wherein each lumen of the plurality of lumens converges into an outlet lumen of the catheter.
26. The method of claim 21 , wherein the inlet tube, the catheter, the outlet tube, and the first membrane are all made of the same material.
27. The method of claim 26 , wherein the material comprises a silicone elastomer coated with covalent heparin, and
wherein the bodily fluid only contacts the material when using the implantable pump.
28. The method of claim 16 , wherein the implantable pump further comprises a piston configured to interface with the rotor and the first membrane, and wherein causing the rotor to transition between the intake position and a discharge position causes the piston to transition between a first position and a second position.
29. The method of claim 28 , wherein the piston is configured to interface with the first membrane and wherein the membrane is caused to stretch as the piston transitions between the first position and the second position.
30. The method of claim 16 , wherein the implantable pump further comprises a lever in mechanical communication with the rotor, wherein the lever is configured to move between an open position and a closed position responsive to rotation of the rotor to cause the inlet tube to periodically kink such that the bodily fluid is pumped from the first bodily portion towards the second bodily portion via the inlet tube, the fluid chamber, and the outlet tube.