61 results about "AV Anastomosis" patented technology

An external stent type prosthesis is provided that is extraluminal, with at least one tubular member, interconnectable in an upper end, and inflatable by a balloon with a central lumen, single but with multiple projections in equal plurality of tubular members of the stent which is adjusted in its interior, for side-to-side, end-to-end, end-to-side anastomosis without clamping and sutureless, or with expeditious clamping and sutureless, where the vascular graft, or anastomotic trunk, or any other grafts, inserted in the lumen of the balloon and prosthesis, comprising a distensible mesh and after being coated with graft, this mesh is expansible by the balloon until the necessary gauge to keep the graft wall joined together and sealed in relation to the organ wall, that can contain a bag suture around the place where the anastomosis is made.

A device for assisting in anastomosis of tubular structures. The basic device has a generally cylindrical shape with a pair of insertion arms and a central depression that provides a space for the needle to move through within the tubular structures while simultaneously providing support so that the suture needle thrust does not collapse the tubular structure wall. The depression may be configured to guide the path of the needle. A bridge connects the arms and prevents the needle from inadvertently coming in contact with the wall opposite that of the wall being sutured. The method includes an initial suture to join the sutures, inserting the device into the openings of the two structures, placing sutures in the walls adjacent to the depression, optionally rotating the device so the depression is aligned with each suture as it is being placed, removing the device, and tightening the sutures to complete the anastomosis.

The invention provides a magnetic force compressing anastomosis ring, comprising a pair of magnetic rings respectively accommodated in the fractured ends of two tissues to be anastomosed, wherein the two magnetic rings are sucked to tightly clamp the free margins of the fractured ends of the two tissues to be anastomosed. The two magnetic rings of the magnetic force compressing anastomosis ring are respectively placed in the fractured ends of the stomach (intestine), and pressure is tightly applied to the two fractured ends to realize anastomosis under the action of magnetic force, so that occlusion tissues are gradually necrotic because of ischemia, meanwhile, occlusion tissues at fractured ends of the stomach (intestine) gradually heal up through an inflammatory reparative process. Along with the gradual necrosis of the occlusion tissues, the two rings are close to each other gradually, and the magnetic force is further enhanced, so that tight anastomosis is maintained, and the necrosis of the occlusion tissues is sped up. The anastomosis is firm and tight, the operation is simple, the healing process is quick, scars are small, surfaces of wound are smooth, and the gastrointestinal cavity is unobstructed. The anastomosis ring can effectively reduce complications after anastomosis operation such as anastomosis leakage, stenosis and the like, and can guarantee good alimentary tract function after operation, thus being the most advanced alimentary tract anastomosis machinery at present.

Prosthetic devices are provided that are used in end-to-side, end-to-end and side-to-side anastomosis without clamping and sutureless, without clamping and with suture, with clamping and sutureless, and/or with clamping and with suture, where the graft is inserted under the light of prosthesis or in at least one of the intraluminal portions of the prosthesis tubular member. The prosthesis can be produced in varied shapes and sizes to accommodate varied sizes and types of grafts, and also can be formed by two halves that can be joined by pressure, bolts or by a rocker portion, and can be made of any proper material for surgical use, such as titanium, stainless steel, nitinol, pyrolitic carbon, silicon, biodegradable materials, or any other biocompatible and inert materials.

The invention belongs to the technical field of medical instruments, in particular to an anastomosis clamp used in an endoscope. The anastomosis clamp comprises a hand shank assembly, a connecting rope assembly and a clamp assembly; the hand shank assembly comprises a first core rod and a second core rod which are arranged in parallel, the first core rod is movably sleeved with a first sliding ring, and the second core rod is movably sleeved with a second sliding ring; the connecting rope assembly comprises a first inhaul cable arranged on the first sliding ring, a second inhaul cable arrangedon the second sliding ring and an outer pipe arranged at the end of the first core rod and the end of the second core rod, and the other end of the outer pipe is connected with the clamp assembly; the clamp assembly comprises a connecting piece, a clamping base arranged outside the connecting piece in a sleeving mode and two clamping pieces fixedly connected to the clamping base, the first inhaulcable sequentially penetrates through the outer pipe, the connecting piece and the clamping base and then is fixedly connected with the first clamping piece, and the second inhaul cable sequentiallypenetrates through the outer pipe, the connecting piece and the clamping base and then is fixedly connected with the second clamping piece. The anastomosis clamp is capable of anastomosing the tissueneeding anastomosis accurately, safely and conveniently in a full-thickness mode in the using process.

The invention provides a preparation method of a self-anastomosis artificial intravascular stent. A three-layer artificial intravascular stent similar to a natural intravascular structure is prepared through electrostatic spinning and extrusion printing; anastomosis cannulas with the same inner diameter as an intravascular stent are extruded and printed at the two ends of a double-layer stent formed by the intravascular stent and an intravascular intermediate stent by adopting a shape memory material, so that the deformation of the anastomosis cannulas can be controlled by changing the external temperature; the self-anastomosis of an artificial blood vessel and an autologous blood vessel without auxiliary tools and suture lines is achieved. Results of the embodiment show that after the anastomosis cannulas of the self-anastomosis artificial intravascular stent are inserted into the fracture ends of the autologous blood vessel, heating is conducted; the diameter of the fracture ends of the autologous blood vessel is increased under the support of the anastomosis cannulas, then the anastomosis of the autologous blood vessel and the self-anastomosis artificial intravascular stent is achieved, and the auxiliary tools are not needed.

The invention discloses a microscopic anastomosis training model and a vascular model preparation process for the model. The training model comprises a vascular model, a pipeline connecting system, ablood circulating pump, a base and a supporting platform; the blood circulating pump is arranged in a sealed cavity; a plurality of openings are formed in the supporting platform; the vascular model is communicated with the pipeline connecting system through a joint; and the pipeline connecting system is communicated with the blood circulating pump. The vascular model adopts a specific material and a specific manufacturing process, so that the touch feeling and the structure are close to those of real blood vessels of a human body; the microscopic anastomosis operation training model is helpful for better understanding blood vessel anatomy and anastomosis angles, directions, positions and effects, and the model is used for assisting a trainee to improve the accuracy of blood vessel anatomyseparation and suture. Moreover, after the model is displayed to the patient, the patient can visually and deeply understand physiology, anatomy, characteristics, operation schemes and the like of the neurosurgery operation.

Prosthetic devices are provided that are used in end-to-side, end-to-end, and side-to-side anastomosis without clamping and sutureless, or with clamping and sutureless, where the graft is inserted in at least one of the intraluminal parts of the tubular member of the prosthesis, and is everted and coated, being previously fixed to the flange. The tubular member and flange are screwed among them in order to make the size of the intraluminal part more flexible.

The stapler of the invention is a surgical stapler/cutter that allows latero-lateral intestinal anastomosis, for both open surgery and laparoscopic surgery, at a distance from the openings used to insert the instrument. The stapler is based on the conventional structure of this type of stapler, and one of the fundamental features thereof is that an interspace (12) that determines a space for inserting the free ends (13, 13′) of the tissues (8, 8′) to be joined, is determined between an articulation shaft (3) of the two jaws (4, 5) of the stapler and the front end at which are disposed forms (6) and vertically movable teeth (9) on which staples (7) are disposed. This prevents the staples for the anastomosis and those for the removal of the pathological area from crossing when the area to be removed is cut. The invention also provides for the inclusion, in the described inter-space (12), of an Infrared Data Association (IrDA) device for testing blood flow that transmits a signal to a luminous signalling device which is visible to the user and which allows the degree of tissue vascularisation to be assessed.

The invention discloses an anastomat with an effect of implementing pre-pressing and a control method of thereof. A propelling rack is driven through a push block by operating a handle, and a swing block is driven to rotate, a pre-pressing sleeve is driven to move toward the far end of the anastomat by utilizing a swing block connecting rod, a swing block push rod and other a plurality of intermediate driving parts, and the jaw of an actuator is closed; and the propelling rack is used for driving the intermediate driving parts of the pre-pressing sleeve to move toward the near end of the anastomat through a percussion rod, and the jaw is opened. According to the anastomat, percussion operations of pre-pressing and cutting anastomosis can be carried out by means of the handle, and the structure of the pre-pressing assembly of the anastomat is simplified.

Flexible tip adapter coupled to a needled wire for a circular stapler ogive trocar invention relates to a surgical instrument that has a flexible tapered end, hollow or solid, continued with surgical thread of varying material and caliber, needled with a straight, curved or semi-curved needle and another rigid end which can be coupled to the rod of the circular surgical stapler. Its use occurs primarily in video laparoscopic surgery, providing a safe transfixion of hollow viscera tissues to be anastomosed. It aims to facilitate the manipulation of the trocar/ogive rod assembly and to minimize the risk of inadvertent injuries to the tissue being anastomosed, consequently reducing the risk of anastomotic fistula.

A surgical instrument for forming an end-to-end anastomosis includes first and second handles each supporting a shaft at a distal end thereof. The proximal ends of each shaft are coupled about a pivot such that movement of the handles correspondingly moves the distal ends of each shaft. A release mechanism is included that is actuatable to pivot a pair of bifurcated legs of each shaft between a first position for receiving first and second vessels and a second position that facilitate release of the respective first and second vessels. First and second posts are supported on each distal end and are configured to support an end of the respective first and second vessels thereon. The posts are adapted to connect to an electrical generator for communicating energy through each end of each respective first and second vessel to form an anastomotic seal.

A medical device for an anastomosis is provided. The medical device distinguishes an inner tubular layer, an outer tubular layer, and a support element defining a longitudinal axis. It further distinguishes two or more independent C-rings distributed and positioned at an acute orientation angle relative to the longitudinal axis of the support element at one end of the support element. The support element and the two or more C-rings are embedded in between the inner and the outer tubular layers. The types of applications one could envision are e.g. a proximal anastomosis, distal anastomosis, or side-to-side anastomoses, in a customized pre-fabricated graft. Embodiments of the invention could also be incorporated into an anastomotic connector device design. Embodiments of the invention could further be envisioned as vascular grafts applications such as Coronary Artery Bypass Graft (CABG), dialysis access grafts and peripheral vascular applications.

The invention discloses an anastomat capable of anastomosing focus tissues with different thicknesses and anastomosis nails, and belongs to the technical field of medical instruments. The anastomat is characterized by comprising an anastomat body, wherein a percussion rod is hinged to the bottom of the anastomat body, a percussion tube is fixedly connected to the left side of the anastomat body, an anastomosis bin is movably installed on the inner wall of the percussion tube, a pressing ring is slidably connected to the inner wall of the percussion tube, a positioning rod is slidably connected to the inner wall of the anastomosis bin, and the positioning rod penetrates through the anastomosis bin and is fixedly connected with a nail anvil. According to the anastomat, the anastomosis nails are arranged, medical staff can select two different specifications of anastomosis nails according to the thickness of the focus tissues needing to be cut off by a patient, and the application range of the anastomosis nails is enlarged; the nail anvil composed of an outer bin base and an inner bin base and provided with a high outer ring and a low inner ring can achieve the effects of good hemostasis and good blood supply; and the double-ring type anastomosis bin base is adopted, anastomosis can be more uniform at the focus wound of the patient, the anastomosis efficiency is higher, and bleeding is reduced.

The invention discloses a microscopic instrument suite for intraoperative vascular anastomosis. The microscopic instrument suite comprises a pair of surgical operation scissors and a vascular bifurcation angle measurer matching the surgical operation scissors. The surgical operation scissors comprise a holding handle, a fixed scissor blade and an adjustable scissor blade, wherein the fixed scissorblade and the adjustable scissor blade are hinged to the holding handle respectively; the adjustable scissor blade comprises a fixed part hinged to the holding handle and a scissor blade part detachably connected to the fixed part, and blades are embedded in the fixed scissor blade and the scissor blade part of the adjustable scissor blade. On the basis of the special shear blade structure of thesurgical operating scissors, the angle or length of the shear blades can be adjusted or replaced according to different blood vessel bifurcation angles, blood vessels can be trimmed conveniently, thesurgical effect is improved, and the requirement for trimming blood vessel bifurcations of different lengths is met; the blood vessel bifurcation angle is reliably measured through the blood vessel bifurcation measurer, so that a reliable and accurate basis is provided for blood vessel trimming operation of the surgical operation scissors, and accurate trimming of blood vessels is facilitated.

The invention belongs to the technical field of medical equipment, and provides a urethral anastomosis guide. The urethral anastomosis guide is used for facilitating urethral anastomosis for the difficulty of anastomosis of an existing urethral anastomosis guide. The urethral anastomosis guide comprises a main body, and a plurality of grooves are formed in the periphery of one end part of the mainbody and are distributed in the circumferential direction of the main body in an annular array mode. The six grooves are evenly distributed in the circumferential direction of one end of the main body. The part, provided with the grooves, of the main body is a bending part, and the groove forming positions are at angles of 30 degrees, 90 degrees, 150 degrees, 210 degrees, 270 degrees and 330 degrees with the bending direction of the bending part separately. The urethral anastomosis guide has the beneficial effects that the guide can be used for greatly reducing the difficulty of bladder neckurethral anastomosis. Due to the existence of the grooves, the positions of needles in and out are fixed, the suture distribution positions are relatively uniform, involution of the urethral mucosa and the bladder mucosa is well, and situations such as urine leakage or anastomotic stoma stenosis due to poor mucosal involution are prevented after surgery.

This document describes devices and methods for suturing an anastomosis. For example, this document describes transurethral probe devices that can be used to suture a vesicourethral anastomosis with one continuous stitch along a helical toroidal path.

A method is described for testing the viability of a tissue of a patient for an anastomosis using a perfusion measuring device wherein the method may comprise: controlling at least one actuating structure of the perfusion measuring device to rapidly ramp up a force exerted on at least one test area of the tissue selected for an anastomosis, the force exerted on the at least one test area defining a local (systolic) perfusion pressure; and, during the ramp up of the force, the computer receiving a sensor signal from at least one sensor of the perfusion measuring device and a signal from a blood pressure device, the sensor signal being indicative of perfusion of blood through the micro vascularization in the first test area and the blood pressure signal being indicative of a general (systolic) blood pressure of the patient; controlling the first actuating structure to slowly ramp down the force exerted on the first test area, when the sensor signal signals the computer that the perfusion of the blood in the tissue of the first test area has stopped; and, during the ramp down of the force, the computer determining the local perfusion pressure at which the sensor signal indicates a start of perfusion of blood through the micro vascularization, the determined local perfusion pressure defining a reperfusion pressure value of the first test area; and, determining a prediction whether or not the tissue of the at least one test area is viable for an anastomosis on the basis of the local reperfusion pressure value of the at least one test area and the general systolic blood pressure value.

The invention discloses a suture needle asymmetric arrangement method for surgical anastomosis and a surgical anastomat. A first suture needle row comprises a plurality of first suture needles, and a second suture needle row comprises a plurality of second suture needles; on a surface parallel to the first suture needle row, the projection of the central line of the first suture needle at least partially overlaps with the projection of the second suture needle which is nearest to the first suture needle; and on a surface parallel to the second suture needle row, the projection of the central line of the second suture needle at least partially overlaps with the projection of the first suture needle which is nearest to the second suture needle. A needle bin of the anastomat is provided withat least two needle hole rows, wherein the first needle hole row comprises a plurality of first needle hole, and the second needle hole row comprises a plurality of second needle holes; on a surface parallel to the first needle hole row, the projection of the central line of the first needle hole at least partially overlaps with the projection of the second needle hole which is nearest to the first needle hole; and on a surface parallel to the second needle hole row, the projection of the central line of the second needle hole at least partially overlaps with the projection of the first needle hole which is nearest to the second needle hole.