4 results about "Arterial Intima" patented technology

The invention relates to the technical field of medical instruments, and discloses a disposable simple in-vitro transplantation renal artery perfusion apparatus which comprises a buckle seat, a panel and a perfusion tube, a perfusion tube mounting hole is formed in the middle of the panel, the perfusion tube is connected in the perfusion tube mounting hole in the middle of the panel in a penetrating mode, one end of the perfusion tube is connected with a perfusion tube, and the other end of the perfusion tube is connected with a drainage tube. The other end is inserted into the abdominal aorta; the buckle base comprises a bottom plate and side plates arranged at the two ends of the two sides of the bottom plate, a penetrating hole is formed in the middle of the bottom plate, and clamping grooves are formed in the inner sides of the side plates. The disposable simple in-vitro transplantation renal artery perfusion apparatus can be effectively fixed at an opening of an artery, perfusion can be carried out by connecting an infusion tube, assistance of other people is not needed, fixation is good, perfusate cannot leak out to cause waste, and intima of the artery cannot be damaged to cause series complications.

The application relates to the field of biological medicine, in particular to a medicine for preventing intimal hyperplasia and application thereof, and specifically discloses application of a plasmid in preparation of a medicine for preventing intimal hyperplasia through extra-vascular injection, wherein the plasmid is one or more of HGF plasmid, VEGF plasmid and eNOS plasmid, and the plasmid is a naked plasmid. Through the scheme, a medicine of a safe, simple, efficient and local continuous expression gene delivery mode is developed, the medicine is precisely delivered from outside to inside through an extra-vascular injection path, the problems of easy loss of intraluminal medicine and poor targeting of systemic administration are solved, and the treatment effect of the disease is greatly improved.

Disclosed is a deep learning segmentation model training method, comprising: acquiring a three-dimensional vascular image containing a vascular segment of interest; processing the three-dimensional vascular image by means of a deep learning segmentation model to be trained, so as to obtain a tunica media segmentation result image and a tunica intima segmentation result image; determining a loss function according to a tunica media segmentation result label, a tunica intima segmentation result label, the tunica media segmentation result image, and the tunica intima segmentation result image, and updating a parameter of the deep learning segmentation model to be trained so as to obtain a trained deep learning segmentation model, wherein a tunica media segmentor and a tunica intima segmentor of the deep learning segmentation model use a cross-attention mechanism to segment the three-dimensional vascular image to obtain the tunica media segmentation result image and the tunica intima segmentation result image. The described method allows for the accurate segmentation of tunica intimae and tunica mediae of blood vessels. Further disclosed are a deep learning segmentation model training apparatus, a vascular image segmentation method and apparatus, an electronic device, and a readable storage medium.

The present invention relates to the technical field of surgical instruments used in donor organ transplantation. Disclosed is an integrated puncture and perfusion catheter for perfusion of donor abdominal organs for transplantation, comprising: a puncture cylinder, wherein a reservoir is fixedly connected to a puncture end of the puncture cylinder; and further comprising: a puncture and perfusion switching mechanism, wherein the puncture and perfusion switching mechanism is arranged at the center of the puncture cylinder, and is used for freely switching the puncture and perfusion functions of the puncture cylinder at the same position. Through cooperation of provided structures such as a first rack, a second rack, and a guide member, the rotation of a gear disc can be used to control the first rack and the second rack to slide in opposite directions of the puncture cylinder, such that a puncture tip moves backward upon the completion of penetration to provide clearance, thereby avoiding damage to tunica intima caused by retention of the puncture tip, and improving the viability of a harvested organ; and the second rack carries a support tube by means of the guide member to move towards the perfusion position, and the support tube replaces the puncture tip at the puncture position, such that a perfusion pipe is prevented from deviating from a puncture port, thereby minimizing perfusate usage costs.