An example medical device is disclosed. An example medical device includes an expandable stent. The stent includes a tubular scaffold formed of one or more interwoven filament. The tubular scaffold includes an inner surface and a flexible valve extending radially inward from the inner surface of the scaffold. Further, the valve is configured to shift between a closed configuration and an open configuration and the one or more filaments of the scaffold bias the valve to the closed configuration while in a nominally deployed state.

Methods and compositions for treating diseased or damaged tissue, such as Inflammatory Bowel Disease, e.g., Ulcerative Colitis, include tissue regeneration extracellular matrix hydrogel (ECMH) which stimulates stem cell migration to the damaged tissue. The tissue grafts can be extracellular matrix (ECM) material, such as tissue-specific extracellular matrix (TS-ECM). The methods can also include mucosal resection of the damaged or diseased tissue prior to placement of the graft.

Non-degradable, non-immunogenic microporous hydrogel compositions are provided. Such hydrogel compositions consist of flowable hydrogel particles comprising a bioinert polymeric backbone, including for example a poly(ethylene glycol)(PEG)-based polymeric backbone, an annealing component comprising a physiologically-stable, radically polymerizable alkene, including for example methacrylamide, and a heparin compound. Methods of treating glottic incompetence and/or providing laryngeal reconstruction are also provided. Such methods consist of providing a subject suffering from glottic incompetence and/or in need of laryngeal reconstruction, and administering a non-degradable, non-immunogenic microporous hydrogel composition disclosed herein.

A sheet for covering a wound includes a laminate of a serosal membrane and a cell sheet. The sheet for covering a wound has a proper thickness and strength. The sheet does not flow out from the wound site and can be fixed to the wound site by suture or anastomosis, if necessary. The sheet can be stably engrafted onto a wound region.

A penile construction template may include an adhesive film configured for adhesion to donor skin. The penile construction template may include a first section defined on the adhesive film to identify an external phallus skin flap of the donor skin to be extracted while the adhesive film is adhered to the donor skin, and a second section defined on the adhesive film to identify a de-epithelialized skin flap of the donor skin to be extracted while the adhesive film is adhered to the donor skin. An implantable device for urethra construction may include a tubular scaffold configured to be coupled to a natal urethra of a patient, the tubular scaffold being seeded with urethral cells of the patient for growth of a urethral segment on the tubular scaffold therefrom while disposed within a body of the patient.

Provided herein are recombinant miniature swine expressing human CD47 in a tissue specific fashion. Also provided are kidneys isolated from a miniature swine, wherein the glomeruli of the kidney express human CD47 at a level higher than the level of human CD47 expression in the tubules of the kidney. Furthermore, provided herein are methods of transplanting such swine kidneys with glomeruli-specific expression of human CD47 from recombinant miniature swine into human recipients. In certain aspects, provided herein are methods of transplantation comprising transplanting hematopoietic stem cells expressing human CD47 from a first donor animal (e.g., a miniature swine) and a kidney expressing human CD47 in the glomeruli from a second donor animal (e g., a miniature swine) to a recipient (e.g., a human recipient).

An example medical device is disclosed. An example medical device includes an expandable stent. The stent includes a tubular scaffold formed of one or more interwoven filament. The tubular scaffold includes an inner surface and a flexible valve extending radially inward from the inner surface of the scaffold. Further, the valve is configured to shift between a closed configuration and an open configuration and the one or more filaments of the scaffold bias the valve to the closed configuration while in a nominally deployed state.

An implantable medical device that is fabricated from materials that present a blood or body fluid or tissue contact surface that has controlled heterogeneities in material constitution. An endoluminal stent-graft and web-stent that is made of a monolithic material formed into differentiated regions defining structural members and web regions extending across interstitial spaces between the structural members. The endoluminal stent-graft is characterized by having controlled heterogeneities at the blood flow surface of the stent.

Methods are disclosed which combine electrospinning and a sacrificial template, such as with additive manufacturing (AM), to produce fibrous microvascular scaffolds which are biodegradable, porous, and easily handled. In one example, a process for fabricating a fibrous network construct is disclosed. The method includes electrospinning a first layer of fibrous material; printing a micropatterned sacrificial template; transferring the micropatterned sacrificial template onto the electrospun fibers; electrospinning a second layer of fibrous biomaterial onto the micropatterned sacrificial template thereby encapsulating the template and generating a construct with two layers; and removing the sacrificial template, producing a fibrous construct with channels or microstructures formed therein. Also disclosed are fibrous constructs and scaffolds produced by the provided methods.

A percutaneous transseptal surgical implantation method for replacing a defective atrioventricular (AV) valve with a conical shaped prosthetic valve formed from extracellular matrix (ECM) tissue. When the method is employed to replace a native mitral valve, the method positions the prosthetic tissue valve in the mitral valve region, whereby the valve does not obstruct the outflow tract of the aortic valve and prevents the leaflets of the aortic valve from coapting.