Tissue-based drain manifolds
View Patent ↗Disclosed herein are tissue-based drain manifolds comprising partially or completely decellularized tissue that has been processed to form tubes, columns, sheets, or other shapes and which are useful for managing the drainage of fluid and/or the administration of negative pressure at an implant site in a patient. The manifolds can be implanted in a patient and provide a natural scaffold in which native cells from surrounding tissue can migrate and proliferate, thereby avoiding the need to remove the implanted manifolds after drainage is complete.
1. A tissue-based drain manifold, comprising partially or completely decellularized dermal tissue that has been formed into a sheet, tube, or column and either
a. micro-machined to contain grooves, channels, or holes; and crosslinked; or
b. micronized, reformed into thin strips, rolled to form tubes, and crosslinked; and a biocompatible or bioresorbable synthetic component in the form of an inner conduit surrounded by the partially or completely decellularized dermal tissue in the manifold and an exterior conduit surrounding at least a portion of the partially or completely decellularized dermal tissue in the manifold.
2. The manifold of claim 1 , wherein the grooves, channels, or holes are prepared using laser micro-machining.
3. The manifold of claim 1 , wherein the partially or completely decellularized dermal tissue in the manifold has a grid-pattern surface texture.
4. The manifold of claim 1 , wherein the manifold comprises multiple rolled tubes linked together with strips of decellularized tissue.
5. The manifold of claim 1 , wherein the partially or completely decellularized dermal tissue in the manifold is cross-linked using e-beam radiation.
6. The manifold of claim 5 , wherein the manifold is exposed to a dose of about 5-50 kGy of e-beam radiation.
7. The manifold of claim 1 , wherein an initial structural strength of the manifold is provided by irradiating the manifold and controlling a dose of radiation or a moisture content of the manifold prior to irradiation.
8. The manifold of claim 1 , further comprising at least one additional factor selected from an anti-inflammatory agent, an analgesic, a cell growth factor, an angiogenic factor, a differentiation factor, a cytokine, a hormone, and a chemokine.
9. The manifold of claim 8 , wherein the at least one additional factor is encoded by a nucleic acid sequence in an expression vector that is contained within one or more viable cells.
10. The manifold of claim 1 , wherein the synthetic component comprises at least one of poly-caprolactone, polylactic acid, polyurethane, polygalacturonic acid, polymer polyglycolic-lactic acid, polyhydroxyalkanoates, and polydioxanone.
11. The manifold of claim 1 , further comprising at least one flexible filament attached to the manifold.
12. A method of treatment, comprising
implanting into a patient in need of fluid management at least one tissue-based drain manifold,
wherein the at least one tissue-based drain manifold comprises a partially or completely decellularized dermal tissue that has been formed into a sheet, tube, or column and either
a. micro-machined to contain grooves, channels, or holes; and crosslinked; or
b. micronized, reformed into thin strips, rolled to form tubes, and crosslinked;
wherein blood and/or other fluid can drain from the implant site through the tissue-based drain manifold;
wherein the tissue-based drain manifold is not removed from the patient but is repopulated with native cells from tissue surrounding the implant site; and
wherein the tissue-based drain manifold further comprises a biocompatible or bioresorbable synthetic component in the form of an exterior hollow tube forming an exterior coating surrounding at least a portion of the partially or completely decellularized dermal tissue in the manifold and an inner hollow tube surrounded by the decellularized dermal tissue in the manifold.
13. The method of claim 12 , further comprising attaching the tissue-based drain manifold to a synthetic polymeric tubing.
14. The method of claim 13 , wherein the synthetic polymeric tubing is fluidly connected to a pump that provides negative pressure to an implant site through the polymeric tubing and the implanted tissue-based drain manifold.
15. The method of claim 14 , wherein a drape or dressing covers the implant site and seals the epidermis surrounding the implant, with the synthetic polymeric tubing passing through the dressing from the pump to the implanted tissue-based drain manifold.
16. The method of claim 12 , wherein the implanted tissue-based drain manifold further comprises at least one flexible filament that provides a pathway for channeling fluid to the manifold.