5 results about "Pericardium tissue" patented technology

This application discloses a pericardial puncture sheath needle, comprising an outer sheath needle, a puncture needle, a needle slide, and a negative pressure injector. The outer sheath needle is fitted onto the puncture needle, and the puncture needle slides inside the outer sheath needle via the needle slide. The negative pressure injector is connected to the outer sheath needle via a Luer interface. The outer sheath needle includes an upturned tip and a straight sheath needle, the straight sheath needle being connected to the upturned tip. A negative pressure hole is provided at the end of the straight sheath needle near the upturned tip. The puncture needle has a drainage hole. When the puncture needle slides to its outermost position, the tip of the puncture needle is located on the side of the negative pressure hole away from the upturned tip. When the puncture needle slides to its innermost position, the drainage hole corresponds to the negative pressure hole. By setting the upturned tip, the sheath needle can conform to the human body structure when entering the body. By setting the negative pressure hole, the puncture site can be drawn into the sheath needle by negative pressure, and then the puncture needle can be used to puncture the pericardial tissue.

The present application provides a pericardial traction exposure device for minimally invasive cardiac surgery, and relates to the technical field of medical devices, which comprises a dilatation ring and a traction assembly arranged on the dilatation ring. The dilatation ring is a deformable elastic ring structure, which can gently and uniformly expand the pericardial tissue after being inserted into the pericardial cavity. The number of traction assemblies is multiple, and they are uniformly arranged on the outer periphery of the dilatation ring along the circumference. The traction assemblies work together to provide more uniform and stable traction force for the pericardial tissue, effectively exposing the heart and providing a clearer surgical field for the surgeon, simplifying the surgical steps, reducing the operation complexity, and improving the overall efficiency and safety of the surgery. Moreover, the dilatation ring and the traction assembly of the present application do not need to be pulled out from the chest wall after traction of the pericardial tissue, avoiding additional surgical incisions and being beneficial to the postoperative recovery of the patient.

The embodiment of the invention provides a cardiac pace-making mode, a cardiac pace-making electrode wire for realizing the mode and a pace-making control method, and belongs to the technical field of cardiac pace-making. The cardiac pacing mode is mainly characterized in that the lead is fixed on the pericardial tissue instead of being embedded or sewn on the myocardium. The cardiac pacing electrode wire is composed of a heart fixing assembly, a signal transmission assembly and an electrode assembly. According to the pace-making control method, pace-making parameter combinations including pace-making voltage, pace-making current, pace-making pulse width and pace-making electrode polarity combinations are automatically adjusted. According to the embodiment of the invention, on the premise of meeting pace-making requirements, damage to myocardium and surrounding tissues thereof can be reduced.

A stent scaffold combined with amniotic tissue provides for a biocompatible stent that has improved biocompatibility and hemocompatibility. The amnion tissue can be variously modified or unmodified form of amnion tissue such as non-cryo amnion tissue, solubilized amnion tissue, amnion tissue fabric, chemically modified amnion tissue, amnion tissue treated with radiation, amnion tissue treated with heat, or a combination thereof. Materials such as polymer, placental tissue, pericardium tissue, small intestine submucosa can be used in combination with the amnion tissue. The amnion tissue can be attached to the inside, the outside, both inside and outside, or complete encapsulation of the stent scaffold. In some embodiments, at least part of the covering or lining comprises a plurality of layers of amnion tissue. The method of making the biocompatible stent and its delivery and deployment are also discussed.

Embodiments herein relate to prosthetic heart valves constructed with animal tissue wherein the leaflets are unitary with the inner skirt. In an embodiment, an implantable heart valve assembly is included having a plurality of valve leaflets, an inner skirt, and a metal frame, wherein the plurality of valve leaflets and the inner skirt are formed of a continuous piece of animal tissue. In another embodiment, a method of making an implantable heart valve assembly is included, the method including placing a piece of pericardial tissue over a mold, cross-linking the pericardial tissue in place over the mold, removing the pericardial tissue from the mold, and attaching the pericardial tissue to a frame, wherein the pericardial tissue forms a seamless junction between a plurality of valve leaflets and an inner skirt. Other embodiments are also included herein.