Systems and methods for introducing and monitoring a negative pressure device for protecting an intestinal anastomosis
Systems and methods for monitoring a bypass device for protecting an intestinal anastomosis are provided. The system includes a pump, one or more fluid inlet lines fluidicly coupled to the pump and to a negative pressure chamber of the bypass device, and one or more sensors configured to measure data indicative of pressure within the negative pressure chamber. A controller operatively coupled to the pump and the one or more sensors may be programmed to actuate the pump to generate a vacuum within the negative pressure chamber to thereby pull intestinal tissue towards the bypass device to anchor the bypass device at a target location upstream of the intestinal anastomosis. The controller further may compare the pressure within the negative pressure chamber with a predetermined pressure range and, if the pressure falls outside the predetermined pressure range, adjust the pump to maintain the vacuum within the predetermined pressure range.
1. A system for protecting an anastomosis in an intestine, the system comprising:
an anchor configured to be implanted at a target location in the intestine upstream of the anastomosis, the anchor configured to transition from a compressed state to an expanded state wherein an outer surface of the anchor contacts an inner wall of the intestine at the target location;
a sheath disposed within the anchor and coupled to the anchor to define a negative pressure chamber between an outer surface of the sheath and the inner wall of the intestine;
one or more fluid inlet tubes fluidically coupling the negative pressure chamber to a pump,
wherein the outer surface of the sheath comprises a micropattern of microstructures, each microstructure comprising a protrusion configured to inhibit the inner wall of the intestine from sealing against the outer surface of the sheath to maintain a vacuum throughout the negative pressure chamber such that the anchor remains anchored at the target location when negative pressure is applied in the negative pressure chamber by the pump via the one or more fluid inlet tubes.
2. The system of claim 1 , wherein the anchor comprises:
an inner mesh anchor comprising a downstream region, an upstream region, and a middle region extending between the downstream and upstream regions, the middle region having an outer diameter less than outer diameters of the downstream and upstream regions; and
an outer mesh anchor disposed over the inner mesh anchor, the outer mesh anchor configured to transition from a cylindrical configuration towards a shape corresponding to a geometry of the inner mesh anchor when negative pressure is applied in the negative pressure chamber.
3. The system of claim 2 , wherein the sheath is sealed to upstream and downstream regions of the inner and outer mesh anchors via an upstream seal and a downstream seal, respectively, to thereby define the negative pressure chamber between the outer surface of the sheath, the upstream and downstream seals, and the inner wall of the intestine.
4. The system of claim 2 , wherein, prior to application of the negative pressure in the negative pressure chamber, the inner mesh anchor exhibits an hourglass configuration and the outer mesh anchor exhibits the cylindrical configuration, and
wherein, upon application of the negative pressure in the negative pressure chamber while at the target location within the intestine, the outer mesh anchor and the inner mesh anchor both exhibit the hourglass configuration.
5. The system of claim 1 , wherein each microstructure of the micropattern of microstructures has a shape comprising a circular pillar, rectangle, triangle, square, sinusoid, or semi-spherical shape.
6. The system of claim 1 , wherein the micropattern of microstructures extends radially around a full circumference of the outer surface of the sheath and longitudinally along an entire length of the outer surface of the sheath within the negative pressure chamber.
7. The system of claim 1 , wherein the sheath is configured to extend downstream from the anchor, across the anastomosis, and out an anus.
8. The system of claim 1 , wherein the micropattern of microstructures is only on the outer surface of the sheath within the negative pressure chamber.
9. The system of claim 1 , wherein the micropattern of microstructures is configured to inhibit the inner wall of the intestine from sealing against the outer surface of the sheath responsive to the vacuum to thereby encourage 360° fluidic communication within the negative pressure chamber.
10. The system of claim 1 , wherein the micropattern of microstructures comprises a plurality of rows and a plurality of columns of microstructures throughout the negative pressure chamber.
11. The system of claim 1 , wherein the micropattern of microstructures is arranged in a triangular or rectangular shape on the outer surface of the sheath within the negative pressure chamber.
12. The system of claim 1 , wherein the outer surface of the sheath comprises at least one of ribs or channels configured to guide fluid flow within the negative pressure chamber.
13. The system of claim 1 , wherein each microstructure of the micropattern of microstructures has a cross-sectional width of between 50 and 500 microns, and a height of between 50 to 1000 microns.
14. The system of claim 13 , wherein each microstructure of the micropattern of microstructures has a cross-sectional width of about 300 microns and a height of about 600 microns.
15. The system of claim 1 , wherein each protrusion is configured to extend outwardly from the outer surface of the sheath towards the inner wall of the intestine.
16. The system of claim 1 , wherein each of the one or more fluid inlet tubes has a downstream end coupled to the pump and an upstream end having one or more pores in fluid communication with the negative pressure chamber.
17. The system of claim 16 , wherein upstream ends of the one or more fluid inlet tubes are equally and circumferentially spaced apart within the negative pressure chamber.
18. The system of claim 16 , further comprising one or more sensors configured to measure data indicative of pressure within the negative pressure chamber.
19. The system of claim 18 , further comprising a controller operatively coupled to the pump and the one or more sensors, the controller programmed with instructions configured to:
actuate the pump at predetermined pump parameters to evacuate fluid from the negative pressure chamber via the one or more fluid inlet tubes to generate the vacuum within the negative pressure chamber having a pressure within a predetermined pressure range, the vacuum sufficient to pull intestinal tissue toward the anchor to maintain the anchor at the target location;
compare the data indicative of the pressure within the negative pressure chamber received from the one or more sensors over time with the predetermined pressure range; and
adjust, if the pressure within the negative pressure chamber falls outside the predetermined pressure range, the predetermined pump parameters of the pump, such that the pump applies and maintains the vacuum within the predetermined pressure range within the negative pressure chamber.
20. The system of claim 19 , wherein the controller is configured to generate an alert if the pressure within the negative pressure chamber falls outside the predetermined pressure range.
21. The system of claim 19 , wherein the controller is configured to:
calculate an actual pump run time of the pump to achieve a predetermined total volume of the system; and
determine a presence of an occlusion in the system if the actual pump run time deviates from an expected pump run time.
22. The system of claim 21 , wherein the controller is configured to generate an alert upon determination of the presence of the occlusion in the system.
23. A method for protecting an intestinal anastomosis, the method comprising:
positioning an anchor at a target location in the intestine upstream of the anastomosis, the anchor coupled to a sheath disposed within the anchor to define a negative pressure chamber between an outer surface of the sheath and an inner wall of the intestine;
transitioning the anchor from a compressed state to an expanded state wherein an outer surface of the anchor contacts the inner wall of the intestine at the target location; and
applying negative pressure in the negative pressure chamber via one or more fluid inlet tubes fluidically coupling the negative pressure chamber to a pump,
wherein the outer surface of the sheath comprises a micropattern of microstructures, each microstructure comprising a protrusion configured to inhibit the inner wall of the intestine from sealing against the outer surface of the sheath to maintain a vacuum throughout the negative pressure chamber when negative pressure is applied in the negative pressure chamber, such that the anchor remains anchored at the target location.
24. The method of claim 23 , wherein the micropattern of microstructures extends radially around a full circumference of the outer surface of the sheath within the negative pressure chamber.
25. The method of claim 23 , wherein the micropattern of microstructures is only on the outer surface of the sheath within the negative pressure chamber.
26. The method of claim 23 , wherein the micropattern of microstructures is configured to inhibit the inner wall of the intestine from sealing against the outer surface of the sheath responsive to the vacuum to thereby encourage 360° fluidic communication within the negative pressure chamber.
27. The method of claim 23 , wherein each protrusion is configured to extend outwardly from the outer surface of the sheath towards the inner wall of the intestine.
28. The method of claim 23 , wherein the anchor comprises:
an inner mesh anchor and an outer mesh anchor disposed over the inner mesh anchor, the inner mesh anchor comprising a downstream region, an upstream region, and a middle region extending between the downstream and upstream regions, the middle region having an outer diameter less than outer diameters of the downstream and upstream regions, and
wherein, upon application of negative pressure in the negative pressure chamber, the outer mesh anchor transitions from a cylindrical configuration towards a shape corresponding to a geometry of the inner mesh anchor.
29. The method of claim 28 , wherein the sheath is sealed to upstream and downstream regions of the inner and outer mesh anchors via an upstream seal and a downstream seal, respectively, to thereby define the negative pressure chamber between the outer surface of the sheath, the upstream and downstream seals, and the inner wall of the intestine, and
wherein the micropattern of microstructures is only on the outer surface of the sheath between the upstream and downstream seals within the negative pressure chamber.
30. The method of claim 28 , wherein, prior to application of the negative pressure in the negative pressure chamber, the inner mesh anchor exhibits an hourglass configuration and the outer mesh anchor exhibits the cylindrical configuration, and
wherein, upon application of the negative pressure in the negative pressure chamber while at the target location within the intestine, the outer mesh anchor and the inner mesh anchor both exhibit the hourglass configuration.