59 results about "Anastomotic leakage" patented technology

Anastomosis leak testers for testing for leaks in gastrointestinal anastomoses in patients include an inflation pump and a conduit part. The inflation pump has a compressible portion and a mechanism for providing a uni-directional flow of air through the inflation pump upon intermittent compressing thereof. Conduit parts have an interior space, a portion to be inserted into an anus of a patient or arm to be mated to a gastric tube, rectal tube or endoscope, a pressure relief valve and an indicator pin, and a rearward arm connected to the inflation pump. Upon actuation of the inflation pump, air flows through the inflation pump and through the conduit part into the patient's bowel. When the air pressure in the bowel exceeds a specified pressure, air is released through the pressure relief valve and ejects the indicator pin, which alerts the surgeon that the desired rectal pressure has been reached.

Apparatus and methods are provided for forming a working space on the interior wall of a blood vessel, such as the aorta. The working space is isolated from blood flow and permits creation of an anastomotic hole and subsequent suturing of the hole to form an end-to-side anastomosis, even while the heart is beating. The apparatus comprises tools including inflatable barriers, such as cup-shaped balloons, which engage the inner wall of the blood vessel with minimum trauma and maximum sealing. In a first embodiment, the inflatable barrier is introduced through a penetration at the site of the anastomotic attachment. In a second embodiment, the inflatable barrier is introduced through a second penetration axially spaced-apart from the site of the anastomotic attachment.

Air introduction device for anastomotic leak testing including an elastomeric body optimally configured for partial insertion into the rectum, occlusion of the anus and attachment to a commercially available insufflation bulb. The air introduction device may be dip molded in one piece to form a single use, disposable product. The body has a proximal portion insertable into an anus of a person to cause the anus to constrict around it and form a seal against the anal wall, a distal portion mating with the insufflation bulb to enable air to be directed therefrom into and through the body and an expanded portion which is larger than the proximal portion and interposed between the proximal portion and the distal portion. The expanded portion occludes the anus by engaging with the anal opening to limit insertion of the proximal portion into the anus and seal the body against the anal opening. Embodiments incorporating means to allow the insertion of an endoscope through the device for visual inspection of an anastomosis, and means to prevent over-inflation of the rectum are described.

The invention discloses a magnetic device suitable for anastomosing small vessels. Two permanent magnet-containing permanent magnet anastomosis rings which correspond to the vessel diameters of small vessels to be anastomosed are used for finishing anastomosing blood vessels of different vessel diameters, so that defects such as narrow vessel cavity, pseudoaneurysme, anastomotic leakage, low anastomosis speed and a large number of complications are overcome. The two permanent magnet anastomosis rings are opposite to each other and are smooth, so that endangiums are folded neatly, defects such as narrow anastomotic stoma, blood leakage, massive hemorrhage caused by slip of a ligature, granulation tumor of local tissue and the formation of false artery are avoided, anastomosis speed is increased to be more than 10 times that of manual anastomosis, and anastomosis errhysis caused by congestion edema of an organ due to long-time blood flow blockage of a tissue organ is avoided.

The invention provides a suture-free bilioenteric anastomosis stent manufactured through 3D (three-dimensional) printing. The bilioenteric anastomosis stent comprises a stent pipe and bulging columns bulging out of the outer wall of the stent pipe, and bulging heads are integrally connected at two ends of the stent pipe. The bilioenteric anastomosis stent is made from a degradable biological material through a 3D printing technique. A manufacturing method comprises steps as follows: (1), the diameter of the bile duct of a patient requiring gallbladder-pancreas reconstructive surgery is tested through CT (computed tomography); (2), required 3D printing data are acquired through algorithm conversion and image processing according to a bile duct CT thin-layer chromatographic scanning result, and the bulging columns and the bulging heads are designed on fit contact surfaces; (3), a 3D printer which is most precise currently is used, the biocompatible degradable material is used, the 3D bilioenteric anastomosis stent is printed and manufactured, and the bilioenteric anastomosis stent is applied to suture-free bilioenteric anastomosis. The suture-free bilioenteric anastomosis stent has the benefits of simple structure, convenience in use, remarkable effect, capability of realizing suture-free bilioenteric anastomosis, the risks of anastomotic leakage and stenosis are reduced, and the operation difficulty and risks are greatly reduced.

The invention relates to an intestinal bypass device based on Valtrac anastomosis ring, comprising a Valtrac anastomosis ring in the intestinal. The Valtrac anastomosis ring is composed by two opposite hollow mushroom rings. The two mushroom rings are respectively provided with a slideable-locked bayonet and a bayonet catch, and one mushroom ring is sleeved-jointed with a flexible hose accepted by human body, and one end of which is fixed on the connecting part of the bayonet and bayonet catch on the mushroom ring. The flexible hose is long enough to ensure the other end extend outside of the intestinal slit part and the anus. The intestinal bypass device based on Valtrac anastomosis ring has the advantages of no matching leaking port while connecting the rectum, no secondary operation and intestinal fistulization, safety and convenience.

The invention discloses a colon ligature anastomosis stent which comprises a bypass pipe made from degradable material that is acceptable to the human body; the middle part of the bypass pipe is tubiform, and the two ends of the bypass pipe are respectively provided with a widening funnel-shaped opening; a groove is arranged in a connection section in which the tubiform middle part is connected with the funnel-shaped opening. During the anastomosis, the stent is put in an intestinal cavity, and colon is fixed on the stent by a wire at the groove; the two ends of the colon are in contact with each other in the centre of the vertical axis of the stent, grow and heal, thus realizing the anastomosis of the colon. The colon ligature anastomosis stent can simplify the operation, shorten the operation time and reduce the incidence rate of anastomotic leakage and anastomotic stenosis.

A tissue engineering combined human body lumen succedaneum adopts a tectorial elastic supporting pipe with connecting pieces, wherein an absorbable coating is attached on the outer wall of the supporting pipe, and planted with seed cells thereon. The connecting pieces can reduce the effect of the gullet peristalsis to the planted elastic supporting pipe, and the elastic supporting pipe has favorable flexibility and stronger supporting force, therefore, the tissue engineering combined human body lumen succedaneum provided by the invention can avoid anastomotic leakage, early trachea cannula exodus and newly-born narrow gullet; in addition, the absorbable coating attached on the outer wall of the elastic supporting pipe is planted with the seed cells, thus being capable of inducing or improving the growth and covering of the newly-born esophageal mucosa. After the newly-born esophageal mucosa is covered completely, and the scar tissues of newly-born gullet are stable, the planted succedaneum can be taken out or removed under the direct view of a digestive endoscopy.

The invention discloses an intraesophageal stent used for esophageal rupture and stomal leak plugging and relates to a hollow or tubular prosthesis which can be implanted into a body, in particular to the intraesophageal stent used for lower esophageal rupture and esophageal stomal leak plugging. The intraesophageal stent comprises a stent main body and a backflow prevention device, wherein the stent main body is made of a degradable material; the stomach end of the intraesophageal stent is provided with a dumb-bell-shaped fixed structure and an intragastric part; the dumb-bell-shaped fixed structure consists of a bulb of a dumb-bell and a notch part of the dumbbell; after the stent is implanted, the notch part of the dumb-bell is clamped at a cardia position or a gastroesophageal joint position; the intragastric part is a skirt-like opening extending and expanding into a gastric cavity from the notch part of the dumbbell; after the stent is implanted, the skirt-like opening is put in the gastric cavity, and an intragastric leak seal plugging structure is formed at the joint of esophagus and the stomach; the near end of the intraesophageal stent is provided with an anti-shifting line. The intraesophageal stent disclosed by the invention can be firmly fixed, so that the stent is effectively prevented from shifting; the expanding edge of the skirt-like opening of the intragastric part can play a role of stomal leak plugging, so that the phenomenon that gastric content flows back after the stent is implanted can be effectively prevented.

A biological thixotropic adhesive that contains dextrin, and at least a structural component that provides thixotropy to the adhesive, and optionally at least an antibiotic that is very useful to stimulate the process of healing of tissues in a patient, for example, to prevent anastomotic leaks of the gastrointestinal system, to affix a prosthesis in inguinal hernioplasties, in a patient and to oclude a fistula in a patient. The biological thixotropic dahesive also has anti-inflammatory properties and can be used with a fatty tissue patch.

The invention disclosed biologic tissue material is a biologic tissue material for artificial esophagus prepared from porcine aortic blood vessel as basal body and genipin as cross-linking agent. Its main operation for preparation is: cleaning aortic blood vessel took from alive killed pig, removing bloodstain and grease, and performing cross link treatment with crosslinked fluid formulated from buffer solution and genipin cross-linking agent, wherein genipin concentration in cross-linking system is 2.70-4.50mmol/100ml, pH is 3.5-7.4, and temperature is 20-28deg.C.Biologic tissue material for artificial esophagus prepared by full cross link has good mechanical characteristics such as tenacity and elastic property like high molecular material, has natural structure suitable for peripheral cell, promote cellular adhesion growing on its surface, and is expected to reduce complication such as anastomotic leakage, stricture and necrosis in clinical application.

A totally-laparoscopic circular stapler nail anvil embedding device is characterized by comprising a metal bar (1) and a nail anvil (4), wherein one end of the metal bar (1) is a connecting end (2); the other end of the metal bar (1) is a guiding end (3); the head end of the nail anvil (4) is shaped like a spherical umbrella; the other end of the nail anvil (4) is a center rod (5); the tail end of the center rod (5) is connected with a puncture head (6); and the connecting end (2) of the metal bar (1) is connected with the puncture head (6). After the adoption of a nail anvil embedding method provided by the invention, a circular stapler nail anvil can directly penetrate through the side wall of an esophagus without the need of purse string suture, so that the cutting position of the esophagus is heightened, which can guarantee the resection margin of cancer at the joint of the esophagus and a stomach and improve the effect of radical treatment of cancer. Meanwhile the method avoids the phenomenon that the wall of the esophagus crimps due to purse string tightening, the nail anvil is closer to a nail bin, the nailing is tighter, the probability of incomplete anastomosis is reduced, and thus the probability of laparoscopic esophagus-jejunum anastomotic leakage complications can be reduced remarkably.

The invention relates to a surgical stapler. A head (20) comprises a nail cylinder (21), a nail push post (22), a nail bin (23) and a cutter (24), wherein the nail cylinder (21) is connected to an operating part (30); the nail push post (22) is arranged in the nail cylinder (21) and can be pushed by the operating part (30); the nail bin (23) is arranged at the end of the nail push post (22) and is used for placing stapling nails; the cutter (24) is supported by the nail push post (22) and can be pushed by the nail push post; the cutter (24) is a linear cutter; the nail cylinder (21), the nail push post (22) and the nail bin (23) are of a closed shape surrounding the linear cutter; a nail anvil (10) comprises an anvil seat (12) and a connecting shaft lever (11); and nail positions corresponding to nail holes in the nail bin (23) are formed in the joint surface of the anvil seat (12). With the adoption of the linear cutter of the stapler disclosed by the invention, the anastomotic stoma can be large so as to avoid stenosis; more tissues can be nailed around the anastomotic stoma, so that stomal leak can be avoided as much as possible; and moreover, tissues on two sides of the straight cut incision are close to each other and the incision is not a circular opening, thus achieving an anti-reflux effect.

The invention discloses a device for effectively preventing anastomotic leakage. The device includes a long drainage tube and a micropore support structure arranged outside the drainage tube. The device is characterized in that a groove-shaped opening is formed in the front of the drainage tube; a ribbed plate support is arranged inside the groove-shaped opening; and the micropore support structure completely or partially covers the outer side of the groove-shaped opening. The micropore support structure can be a cylindrical sponge structure which arranged on the drainage tube in a sleeving mode, or a sheet-like structure made of an absorbable tissue reinforcement material which warps the outer side of the drainage tube. In addition, a drainage bottle, a negative pressure suction device and a control structure thereon, a pressure sensing piece and the like are arranged to achieve the purpose of intelligently controlling the negative pressure drainage. The micropore support structure isarranged to support the front end of the drainage tube, so that the drainage tube cannot in contact with mucosal tissue, and the goal of enabling drainage to be safer and more effective is finally achieved.

The invention discloses a degradable magnesium alloy vascular anastomosis ring. The degradable magnesium alloy vascular anastomosis ring is characterized by comprising two ring bodies made of magnesium alloy, wherein the two ring bodies are arranged corresponding to each other; multiple needles are arranged on one ring body, multiple holes are formed in the other ring body, and the position and number of the needles on one ring body correspond to the position and number of the holes in the other ring body. Through the degradable magnesium alloy vascular anastomosis ring, suture-free anastomosis is achieved, no foreign matter is left, and inflammatory reactions are light; the anastomotic effect is reliable and safe; since tissue damage is less, blood supply is good, an anastomotic stoma is completely isolated from excrement, bacteria and other contents in intestines, and high-strength permeation resistance and burst resistance are achieved, anastomotic leakage is effectively prevented; due to the support function of the ring bodies, it is ensured that the enteric cavity is smooth and intestine functions restore early, and a narrow anastomotic stoma is effectively prevented.

The invention relates to a preparation method of an absorbable stent in cerebral vascular bypass surgery and angioplasty. The preparation method includes the steps of selecting a straight through tube to serve as an absorbable stent body; arranging a through pipe made from the same material as the stent body in the middle of the stent body vertically and then connecting the through tube with the stent body into a whole; or, at one end of the stent body, arranging two inclined through tubes which are made from the same material as the stent body and communicated with the stent body, and then connecting the inclined through tubes with the stent body into a whole; or, processing two ports at the two ends of the stent body into inclined-section ports respectively. The prepared stent has excellent safety, and in clinical application, the prepared stent can prevent blood from leaking out of an anastomosis, promote the healing of the anastomosis and avoid anastomosis stenosis; and long-term administration of anticoagulant drugs can be avoided.

The invention discloses an intestinal tract anastomotic leakage protection support which comprises a support woven body. The stent woven body is composed of a double-big-horn-shaped upper end, a double-big-horn-shaped lower end and a middle groove part and is of an integrated net-shaped structure with elastic performance, and the outer surface of the stent woven body is wrapped with a covering film so as to wrap meshes in the stent woven body. The invention further provides a manufacturing process of the intestinal tract anastomotic leakage protection support. The covered stent has the advantages that the covered stent is placed in the anastomotic stoma, so that recovery of the anastomotic stoma is accelerated, and leakage of the anastomotic stoma is avoided; secondary operation intervention is not needed, so that a patient does not need to bear pains of an artificial anus and wearing an ostomy bag; anastomotic leakage is effectively avoided, meanwhile, the living quality of a patient is greatly improved, and the life of a normal person is recovered.

The present invention relates to a device for protecting rectal anastomosis. The device of the present invention is a double type leakage prevention system composed of micro-villi of a head filter and a triple lumen catheter, and thus minimizes contamination of the anastomotic area from intestinal contents, thereby enabling successful healing of the rectal anastomotic area. The device of the present invention has a main tube with side holes, and thus the intestinal contents, even when passing through the head filter, are sucked into the main tube through the side holes, so that the intestinal contents can be effectively drained while being diverted from the anastomotic area. The device of the present invention is inserted through the anus after surgery and thus involves less risk of additional complications due to the installation of the device, and has advantages of low manufacturing costs due to the simplification of the structure and convenient use and handling. Furthermore, the device of the present invention serves as an existing support for protecting anastomosis, thereby alleviating patient discomfort due to anastomotic leakage.

The invention discloses an external drainage tube of a hilar stent, which comprises a main stent tube. The upper end of the main stent tube is forked to form a left stent tube and a right stent tube, an included angle alpha between the main stent tube and the left stent tube is 135 degrees, an included angle beta between the main stent tube and the right stent tube ranges from 90 degrees to 150 degrees, the lower end of the main stent tube is expanded, and a drainage adjusting hole with the diameter of 2mm is arranged at a forked position of the left stent tube and the right stent tube. A plurality of drainage holes with the diameters of 1mm are arranged at crossed regions among the main stent tube, the left stent tube and the right stent tube. The length of the main stent tube ranges from 70cm to 80cm while the tube diameter of the main stent tube ranges from 5.3mm to 4mm, the lengths of the left stent tube and the right stent tube are 6cm, the tube diameters of the left stent tube and the right stent tube are gradually reduced from the forked ends to the tail ends, the tube diameters of the forked ends are identical to the tube diameter of the main stent tube, and the tube diameters of the tail ends are 50% to 65% of those of the forked ends. The external drainage tube of the hilar stent is reasonable in structure, meets requirements of a hilar structure, is placed conveniently, has high clinical practicality, and effectively resolves difficult problems that in the prior art, anastomotic stoma is easy to leak and is narrow and twice or multiple times of surgeries are required, and accordingly sufferings of patients are reduced.