39 results about "End to end anastomosis" patented technology

A tilt top anvil assembly is provided for use with a surgical stapling device for performing end-to-end anastomosis of tissue. The tilt top anvil assembly included an anvil head, a center rod and a biasing member. The anvil head is pivotally secured to the center rod about a transverse axis which is offset from the longitudinal axis of the center rod. The biasing member is supported on the anvil assembly at a position to urge the anvil head to a tilted reduced profile position. The anvil assembly includes a first abutment surface which is operatively connected to the anvil head is movable into engagement with a second abutment surface formed on a surgical stapling device during approximation of the anvil assembly to move the anvil head from the tilted reduced profile position to an operative firing position. When the anvil assembly is moved to the unapproximated or spaced position, the biasing member is positioned to return the anvil assembly back to its tilted reduced profile position.

A circular stapler facilitate performing end to end anastomosis; further an occasional prompt with sound effect warning timely firing the stapler bolts. A circular stapler includes a bolting machine (1) consists of a shaft (11), an actuator (12), and a stapler (13); a hand-held handle (2); an adjusting knob (3); and an anvil (4), a hollow anvil shaft (41);characterized in that: a conic trocar (5) disposed to a most distal end of said bolting machine (1), a cambered surface of said conic trocar (5) formed with, at least, three relieve-pressure grooves (53) equal distant distributed are extended from an apex (51) to a bottom (52); an audio prompt (6) disposed inside said bolting machine (1), said audio prompt (6) includes a printed circuit board (PCB) (61), a buzzer (62) electrically connected to the PCB (61) controlled by a switch, and a battery (64) supplies power to the PCB (61).

Methods and devices for forming an anastomosis between hollow bodies utilizes magnetic force to couple anastomotic securing components and create a fluid-tight connection between the lumens of the hollow bodies. End-to-side, side-to-side and end-to-end anastomoses can be created without using suture or any other type of mechanical fasteners, although any such attachment means may be used in conjunction with the magnetic attachment. The securing components have magnetic, ferromagnetic or electromagnetic properties and may include one or more materials, for example, magnetic and nonmagnetic materials arranged in a laminated structure. The system of anastomotic securing components may be used in many different applications including the treatment of cardiovascular disease, peripheral vascular disease, forming AV shunts for dialysis patients, etc., and may be sized and configured for forming an anastomosis to a specific hollow body, for example, a coronary artery or the aorta.

Apparatus and methods for endoscopic colectomy are described herein. A colectomy device having a first and a second tissue approximation device is mounted on a colonoscope separated from one another. During deployment of the colectomy device, a diseased portion of the colon is positioned inbetween the tissue approximation devices. The tissue approximation devices are radially expanded such that they contact and grasp the colon wall at two sites adjacent to the diseased portion of the colon. The diseased portion is separated from the omentum and is transected using a laparoscope or is drawn into the colonoscope for later removal. The tissue approximation devices are then urged towards one another over the colonoscope to approximate the two free edges of the colon into contact together where they are fastened to one another using the tissue approximation device as a surgical stapler to create an end-to-end anastomosis.

Viscerotomy closure devices and methods of use close a hole in a bodily organ, such as one created during a natural orifice transgastric surgery procedure. A mesh with a hole in its center and an attached loop of suture having a Roeder knot is mounted on the protruding rod of an end-to-end anastomosis stapler between the anvil and the staple carrying member. The mesh covers the staple receiving slots. When rotated when in contact with tissue, an augur-shaped blade attached to the anvil's exterior self-feeds the tissue through a notch in the anvil's base into the space between the anvil and the staple carrying member. After the stapler is fired to staple the mesh to the tissue and create a viscerotomy, a knot pusher cinches the loop of suture and subsequently tightens the Roeder knot to maintain the cinch.

A vascular graft for anastomosis includes a tubular member; and a cuff disposed proximate one end of the tubular member. Another vascular graft for anastomosis includes a tubular member; a side arm disposed on a side of the tubular member, wherein a lumen of the side arm is configured to be in fluid communication with a lumen of the tubular member; and a cuff disposed on the side arm proximate an end distal from the tubular member. A method for vascular anastomosis includes providing a graft device comprising, a tubular member, and a cuff disposed proximate one end of the tubular graft member; and joining the graft device to a target in an end-to-end anastomosis using the cuff of the graft device.

A method and instruments used to performing an end-to-end anastomosis between two portions of intestinal tissue is disclosed. The method involves drawing a first portion of intestinal tissue over a portion of a bioabsorbable stent. The end of the first portion of intestinal tissue is everted on the stent to create a collar of exposed inner intestinal tissue. A second portion of intestinal tissue is drawn over the stent and over the exposed intestinal tissue. A bandage containing one adhesive compound selected from the group of an adhesive and an adhesive initiator is wrapped about the juncture. The other adhesive compound is applied to saturate the bandage and the combination of an adhesive and an adhesive initiator sets the adhesive to adhere the first portion and the second portion of adhesive to the bandage.

The invention relates to a T-shaped dual-chamber balloon expanding drainage tube, and is used for effectively solving the problems that after bile duct end to end anastomosis, retraction of anastomotic stoma scar leads to stenosis of long-term bile duct anastomotic stoma and repeated attack of cholangitis and the expansion effect of the existing equipment can not be adjusted. The technical scheme is as follows: the T-shaped dual-chamber balloon expanding drainage tube comprises a long conduit and a short conduit; one end of the long conduit is vertically connected with the middle part of the short conduit to form a T shape and the conduit chambers are communicated mutually; conduit walls of two ends of the short conduit are painted with developing material marks respectively; the short conduit is covered with a balloon; an gas injection channel and a drainage channel are arranged in the long conduit to form a dual-chamber structure; one end of the gas injection channel is connected with the balloon at the short conduit and the other end is separated from the long conduit and is upward; an air inlet is arranged at the end part; and the drainage channel is communicated with the inner chamber of the short conduit. The T-shaped dual-chamber balloon expanding drainage tube has the advantages of simple, novel and unique structure and progressive and adjustable expansion effect, thus pains of patient are greatly alleviated. In addition, the manufacturing cost is low, the use is convenient and the economic and social benefits are great.

Viscerotomy closure devices and methods of use close a hole in a bodily organ, such as one created during a natural orifice transgastric surgery procedure. A mesh with a hole in its center and an attached loop of suture having a Roeder knot is mounted on the protruding rod of an end-to-end anastomosis stapler between the anvil and the staple carrying member. The mesh covers the staple receiving slots. When rotated when in contact with tissue, an augur-shaped blade attached to the anvil's exterior self-feeds the tissue through a notch in the anvil's base into the space between the anvil and the staple carrying member. After the stapler is fired to staple the mesh to the tissue and create a viscerotomy, a knot pusher cinches the loop of suture and subsequently tightens the Roeder knot to maintain the cinch.

A method and instruments used to performing an end-to-end anastomosis between two portions of intestinal tissue is disclosed. The method involves drawing a first portion of intestinal tissue over a portion of a bioabsorbable stent. The end of the first portion of intestinal tissue is everted on the stent to create a collar of exposed inner intestinal tissue. A second portion of intestinal tissue is drawn over the stent and over the exposed intestinal tissue. A bandage containing one adhesive compound selected from the group of an adhesive and an adhesive initiator is wrapped about the juncture. The other adhesive compound is applied to saturate the bandage and the combination of an adhesive and an adhesive initiator sets the adhesive to adhere the first portion and the second portion of adhesive to the bandage.

Methods and devices using magnetic force to form an anastomosis between hollow bodies. End-to-side, side-to-side and end-to-end anastomoses can be created without using suture or any other type of mechanical fasteners, although such attachment means may be used in practicing some aspects of the invention. Magnetic anastomotic components may be attached to the exterior of a vessel, e.g., by adhesive, without extending into the vessel lumen. Various magnetic component configurations are provided and may have different characteristics, for example, the ability to match the vessel curvature or to frictionally engage the vessel.

The invention relates to a blood vessel end-to-end anastomosis apparatus, aiming to effectively solve problems of alignment and difficulty in vascular suture. The technical scheme includes that the blood vessel end-to-end anastomosis apparatus comprises an internal support section and an external support section, the internal support section includes on L-shaped bar, one end of the L-shaped bar ishinged with multiple first connecting rods in uniform circumferential distribution, the outer end of each first connecting rod is hinged with one second connecting rod, the outer end of each second connecting rod is hinged with one third connecting rod, outer ends of the multiple third connecting rods are hinged on a same disk, the three connected connecting rods form a hinged chain, the other end of the L-shaped bar is sleeved with one sleeve, a plunger is installed in the sleeve, friction damping is formed between the plunger and the sleeve, the L-shaped bar is of a hollow structure, one pull rope penetrates the inner cavity of the L-shaped bar, one end of the pull rope is fixed onto the disk while the other end is fixed onto the plunger, and the external support section includes two arc compression plates. By the arrangement, the operation difficulty in vascular suture is effectively reduced, and the probability of thrombosis is reduced.

Herein is provided an anastomosis device which includes a cylindrical support housing having a tapered section being formed of a plurality of compliant fingers integrally formed around the circumference of an end of the cylindrical section which can flex at their connection point to the cylindrical section. Each compliant finger holds a suture needle. The device includes a push rod having a cam head at one end of the rod section. The cam head is located adjacent to the tapered portion. In operation the anastomosis device is aligned with the anatomical tubular structure undergoing an anastomosis process. When a back end of the push rod is pushed towards the tapered section of the support housing, the cam head section bears against an inner surface causing each compliant finger to flex radially outwards forcing the suture needles to simultaneously pierce the wall of the anatomical tubular structure.

The present invention is directed to a device and method for a nanofiber wrap to minimize inflation and scarring of nerve tissue and maximize the nutrient transport. More particularly, the present invention is directed to a novel semi-permeable nanofiber construct prepared from biocompatible materials. The nanofiber construct is applied around a nerve repair site following end-to-end anastomosis. The nanofiber construct is porous and composed of randomly oriented nanofibers prepare using an electrospinning method. The nanofiber construct has a wall that is approximately 50-100 μm thick with pores smaller than 25 μm. The nanofiber construct prevents inflammatory cells from migrating into the nerve coaption site, while still permitting the diffusion of growth factors and essential nutrients. The nanofiber construct allows for enhanced neuroregeneration and optimal function outcomes.

The invention relates to an electrosurgical instrument (10) for producing an end-to-end anastomosis between two hollow organ sections (12), comprising two tools (16) that can be moved in relation to each other, each of the tools having a high-frequency electrode (24), by means of which the hollow organ sections (12) can be fused to each other. According to the invention, the two tools (16) are substantially sleeve-shaped or at least can be brought into a sleeve shape such that a first tool (16A) can surround a first hollow organ section (12A) and a second tool (16B) can surround a second hollow organ section (12B). The electrodes (24) are each formed on an end face (22) of the sleeve-shaped tools (16), around which end face the respective hollow organ section (12) can be everted, and the two tools (16) can be moved in relation to each other in such a way that the electrodes (24) can be aligned and can clamp the everted hollow organ sections (12A, 12B) between the electrodes.

A vascular graft (30) comprises a proximal inlet section (31), a first distal section (32) and a second distal section (33). The first distal section (32) and the second distal section (33) are attached to the proximal inlet section (31) at a Y-shaped bifurcation region. In use the proximal inlet section (31) is attached to a first part (34) of a host artery in an end-to-side anastomosis. A second part (35) of the host artery is cut to form a first section (36) of the host artery on a first side of the cut and a second section (37) of the host artery on a second side of the cut. The first distal section (32) is attached to the first section (36) in an end-to-end anastomosis, and the second distal section (33) is attached to the second section (37) in an end-to-end anastomosis. When implanted the graft (30) directs blood flow from the first part (34) of the host artery through the proximal inlet section (31), into the second distal section (33) and into the second section (37) of the host artery along a single flow path.

Herein is provided an anastomosis device which includes a cylindrical support housing having a tapered section being formed of a plurality of compliant fingers integrally formed around the circumference of an end of the cylindrical section which can flex at their connection point to the cylindrical section. Each compliant finger holds a suture needle. The device includes a push rod having a cam head at one end of the rod section. The cam head is located adjacent to the tapered portion. In operation the anastomosis device is aligned with the anatomical tubular structure undergoing an anastomosis process. When a back end of the push rod is pushed towards the tapered section of the support housing, the cam head section bears against an inner surface causing each compliant finger to flex radially outwards forcing the suture needles to simultaneously pierce the wall of the anatomical tubular structure.

Methods and devices for perfusing a blood vessel during the entire course of an end-to-side or end-to-end anastomosis procedure. One method can be used to form an end-to-side anastomosis of a saphenous vein graft to a coronary artery during an off-pump, beating heart, coronary artery bypass graft. In this example, the distal end of an elongate tube carrying a saphenous vein graft is advanced into an arteriotomy distal to an occlusion in the coronary artery. Perfusing blood flow is provided through the tube to the coronary artery, the vein graft is advanced over the tube to the arteriotomy and sutured completely to the coronary artery. The elongate tube can be retracted through the now secured vein graft, and the coronary artery supplied again from the proximal end of the vein graft. Some tubular devices include a reversibly expandable distal region, to form a seal between the inserted tube and the coronary artery being perfused, to prevent blood flow into the surgical field.

A process and a device are provided for forming an end-to-end anastomosis on two hollow organs, which can be attached to a surgical suturing machine with at least one driven needle bar with a thread-carrying needle, a shuttle cooperating with this needle, a needle plate and a holding-down device accommodated by a push rod. A carrier (9) is provided designed as a hollow cylinder and has a longitudinal slot (13) for the edge areas of the two hollow organs. The carrier can be connected by means of a bracket to the housing shaft of the suturing machine in such a way that its longitudinal axis runs transversely to the path of movement of the needle, and its contact area for the two hollow organs is directed essentially parallel to the plane of the contact surface of the needle plate of the suturing machine.

A vascular graft (20) comprises a proximal section (4), integral with two branches (2, 3) which terminate in a distal end-to-end section (30). The end-to-end section (30) is attached to a host artery (5) at end-to-end anastomoses (31, 32). Flow of blood from the proximal section (4) to the host artery (5) occurs with a self-correcting flow pattern at the opposing junctions, avoiding arterial bed impingement and associated risk of restenosis.

The invention discloses a disposable self-pressurizing intestinal stapler. The stapler comprises two pressurizing mechanisms which are anastomosed with one another and made of degradable polymer materials and a positioning locking mechanism made of memory alloy; the positioning locking mechanism comprises a plurality of memory alloy locking inserting members, two ends of each memory alloy lockinginserting member are provided with plugging heads to be correspondingly connected with the pressurizing mechanisms in an inserting mode, and the pressurizing mechanisms are connected and anastomosed with one another by adopting the memory alloy locking inserting members as connecting members. According to the stapler, after the stapler is installed in a patient, based on phase transition temperature characteristics of the memory alloy, the memory alloy is in an state in which the alloy constantly restores to an original state in a body temperature state, so that constant contraction force is generated to conduct effective, reliable and constant pressurizing on an anastomosis site to pertinently solve the problem of end-to-end anastomosis of a colonic area, and ensure that anastomosis forceis not affected by repeatedly opening and closing, and various kinds of complications are effectively and safely reduced, and the problem of difficult operation of the intestinal stapler during an operation is solved; the intestinal stapler can be excreted out of the body, and residuals do not remain in the body.

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 suture material to be placed in blood vessels which is developed for end-to-end anastomosis of blood vessels with a lumen in microsurgery in a way to enable end-to-end suturing of blood vessels while at the same time increasing the success of vessel sutures and contributing to keeping the lumen open, wherein the straight wires form the body structure such that a rhombic lattice structure will be obtained, and then the oval wires are passed through the circles positioned at the end portions and knitted by the practitioner.

The invention relates to a blood vessel stent device and use methods thereof. The caliber of the front half section of the blood vessel stent device can be equal to the caliber of the rear half section of the blood vessel stent device, or the caliber of the front half section of the blood vessel stent device can be larger than or less than the caliber of the rear half section of the blood vessel stent device, so as to adapt to blood vessels of different size of a receptor. The use methods of the blood vessel stent mainly comprise two use methods, i.e. an end-to-end anastomosis method and an end-to-side anastomosis method, wherein an end-to-end part is that a guide wire is put in a receptor blood vessel which is to be used as a anastomosis blood vessel, the other section of blood vessel tobe anastomosed is sheathed on the guide wire, and the blood vessel stent for anastomosis is slid into the receptor blood vessel along the guide wire. The strip label of the blood vessel stent can be directly seen from a transparent blood vessel sheath. When the strip label is between two blood vessel sections, the blood vessel sheath is dropped back to release the self-expandable blood vessel stent to complete the anastomosis. The invention has the advantages that the surgical process can be effectively simplified, the surgical time is saved, the surgery success rate is improved and the like.

A process and a device are provided for forming an end-to-end anastomosis on two hollow organs, which can be attached to a surgical suturing machine with at least one driven needle bar with a thread-carrying needle, a shuttle cooperating with this needle, a needle plate and a holding-down device accommodated by a push rod. A carrier (9) is provided designed as a hollow cylinder and has a longitudinal slot (13) for the edge areas of the two hollow organs. The carrier can be connected by a bracket to the housing shaft of the suturing machine in such a way that its longitudinal axis runs transversely to the path of movement of the needle, and its contact area for the two hollow organs is directed essentially parallel to the plane of the contact surface of the needle plate of the suturing machine.

The present invention is directed to a device and method for a nanofiber wrap to minimize inflation and scarring of nerve tissue and maximize the nutrient transport. More particularly, the present invention is directed to a novel semi-permeable nanofiber construct prepared from biocompatible materials. The nanofiber construct is applied around a nerve repair site following end-to-end anastomosis. The nanofiber construct is porous and composed of randomly oriented nanofibers prepare using an electrospinning method. The nanofiber construct has a wall that is approximately 50-100 μm thick with pores smaller than 25 μm. The nanofiber construct prevents inflammatory cells from migrating into the nerve coaption site, while still permitting the diffusion of growth factors and essential nutrients. The nanofiber construct allows for enhanced neuroregeneration and optimal function outcomes.

The invention is directed to a device (1) for sealingly protective and at the same time stool-discharging tamponade of a circular anastomosis of two ends of the large intestine, as occur for example in the surgical resection of a rectal carcinoma, wherein a thin-walled balloon body (5) is placed in the region of the anastomosis, and the balloon (5), providing a tamponade, is filled with a filling medium in such a way that the lowest possible pressure necessary for the sealing tamponade of the anastomosed portion of the intestine can be maintained continuously, and, even in the event of a peristaltic contraction of the rectosigmoid colon, the pressure predefined by the user is maintained as constant as possible, wherein sufficiently high volumetric flows of the pressurizing medium supplied to and removed from the balloon (5) are achieved, such that the sealing contact between the balloon (5) and the intestinal wall is maintained in all segments of the balloon body in the course of a peristaltic contraction wave miming from the sigmoid to the anus.

An end-to-end anastomotic connector is provided. The anastomotic connector includes solely an arterial connector and a venous connector. The inner diameter of the proximal end of the arterial connector is sized to directly receive the proximal end of the venous connector in an interference fit without the need for a graft material therebetween. The arterial connector and the venous connector are implanted in an artery and vein, respectively, to form a co-axial relationship with the respective vessel.