111 results about "Into ureter" patented technology

Set forth are vascular valves and servovalves and methods of using the same that may be positioned in the circulatory system without interrupting blood flow to facilitate solid organ transplantation so as to reduce graft organ anoxia and degradation before and after harvesting and storage, thereby minimizing late-term cardiac allograft vasculopathy as a major cause of graft failure. Along the urinary tract, bypassing bladder-generated urge sensation by diverting urine directly from the ureters to a neobladder or collection bag alleviates intractable incontinence, nocturia, urethral syndrome, overactive bladder, dysuria, or frequency. Where the lower tract is missing, a prosthesis can thwart disease and preclude the degenerative metaplastic transition to carcinoma risked when gut is used to construct a conduit for urine, a neobladder, and / or high-maintenance stoma. Druglines to valves and servovalves can directly pipeline-target medication to nidi, anastomoses, or any other trouble spots.

The invention provides an insertion part, an endoscope and a suction system, and relates to the technical field of endoscopes, the insertion part comprises a tube body, the tube body is provided with a first fluid channel, and the tube body is used for being inserted into a sheathing canal; the second fluid channel is arranged in the axial direction of the tube body, a far port of the second fluid channel is adjacent to a far port of the first fluid channel, and a near port of the second fluid channel is used for being communicated with a sheath tube; the driving part is connected with the second fluid channel and used for driving the second fluid channel to deform in the radial direction of the tube body, and therefore the radial size and the corresponding section flow area of the second fluid channel are adjusted. Friction between the outer wall of the ureter and the inner wall of the ureter can be effectively reduced, mucous membranes are prevented from being pressed or torn, and therefore the risk of postoperative bleeding, infection and the like is reduced.

The invention relates to the technical field of medical instruments, and provides a medical urinary surgery dilation drainage device which comprises a dredging rod, a balloon mechanism and a clamping mechanism, the end, away from an air bag, of a ureter is detachably connected with a main body of a Y-shaped handle, and the dredging rod is made of soft elastic materials and is arranged in a three-section mode; the balloon mechanism is used for expanding in the urethra to extrude the urethra, the end, fixedly connected with the dredging rod, of the balloon mechanism extends out of the end, away from the Y-shaped handle, of the ureter, the balloon mechanism and the dredging rod extend out of the Y-shaped handle at the two branches of the Y-shaped handle correspondingly, and when the dredging rod and the balloon mechanism slide relatively, the balloon mechanism can expand to expand the urethra. The ureter can be pushed to move by pushing the Y-shaped handle, the dredging rod and the balloon mechanism can be pulled out of the ureter, and by means of the technical scheme, the problem that in the prior art, when urinary tract drainage is conducted, the urethra can be damaged many times in the urinary tract expansion process is solved.

The invention discloses a negative pressure suction sheath and a negative pressure suction assembly, and relates to the technical field of medical instruments, the negative pressure suction sheath comprises an insertion tube and a sealing element, the insertion tube is internally provided with a containing channel, the sealing element is arranged in the insertion tube, and the sealing element is in sealing fit with the insertion tube and can block the containing channel. The insertion tube can be inserted into the human body, such as kidney and bladder. The sealing piece can isolate the containing channel of the insertion pipe from the external environment, and the insertion pipe is communicated with the ureter and extends to the kidney. At the moment, the sealing piece can prevent the containing channel of the insertion tube from being directly communicated with the outside, so that the pressure in a cavity and organs is effectively maintained, the pressure change amplitude and range of the kidney are reduced, the pressure change in the organs such as the kidney and the like is stabilized, and the probability that the kidney mucosa bleeding due to the pressure change is effectively reduced. Therefore, the onset risk of complications is reduced.

The invention relates to the technical field of biomedical detection, in particular to a urinary tract epithelium cancer detection marker composition based on ONECUT2 and DMRTA2 gene methylation, which comprises a CpG island region of an ONECUT2 gene, a CpG island region of a DMRTA2 gene and a kit for detecting urinary tract epithelium cancer. The CpG island region of the ONECUT2 gene is located in chr18: 57441548-57441674, and the CpG island region of the ONECUT2 gene is located in The CpG island region of the DMRTA2 gene is located in chr1: 50418714-50418823, and the CpG island region of the DMRTA2 gene is located in chr1: The kit for detecting urothelial carcinoma comprises a first primer pair and a first probe which are used for specifically detecting the methylation state of the CpG island region of the ONECUT2 gene in the claim 1, and a second primer pair and a second probe which are used for specifically detecting the methylation state of the CpG island region of the DMRTA2 gene. The urinary tract epithelium cancer detection marker composition based on ONECUT2 and DMRTA2 gene methylation has high sensitivity and high specificity, the sensitivity and the specificity are both 90% or above, early-stage and low-grade urinary tract epithelium cancer can be effectively detected, comprehensive coverage is achieved, and the urinary tract epithelium cancer detection marker composition is not only suitable for bladder cancer, but also suitable for upper urinary tract epithelium cancer such as renal pelvis cancer and ureter cancer.

The invention discloses a negative pressure suction sheath and a negative pressure suction assembly, and relates to the technical field of medical instruments, the negative pressure suction sheath comprises an insertion tube, a sheath base and a sealing element, the sheath base is arranged at the near end of the insertion tube and is communicated with the insertion tube, and the sealing element is arranged on the sheath base, is in sealing fit with the sheath base and / or the insertion tube, and blocks the near end of the insertion tube from being communicated with the outside. The insertion tube can be inserted into a human body, such as a pelvis and a bladder. The sealing piece can isolate the insertion channel from the external environment, and the insertion tube is communicated with the ureter and extends to the renal pelvis. At the moment, the sealing piece can prevent the insertion channel of the insertion tube from being directly communicated with the outside, so that the internal pressure of the insertion channel, the human body cavity and the organs is effectively maintained, the internal pressure change amplitude and range of the human body cavity and the organs are reduced, and the internal pressure change of the human body cavity and the organs is stabilized; and the probability of bleeding of human body cavities and organs due to severe pressure change is effectively reduced, so that the onset risk of complications is reduced.

An implantable medical device for use as an artificial urinary bladder can include a collection container configured to be placed in a patient's abdominal cavity and a pump configured to be subcutaneously placed outside the abdominal cavity to allow the patient to perceive the need for urination and controls timing of the urination. Flexible tubing can connect the patient's ureters to the collection container, connect the collection container to the pump, and connect the pump to the patient's urethra, with unidirectional valves where needed, to allow for urination through the patient's natural urethra. The implantable medical device can optionally include a cleaning port and tubing connecting the cleaning port to the collection container for introducing a liquid cleaning agent into internal urination circuit of the device for cleaning, disinfection, and prevention of stone formation.

The utility model discloses a urine sampling device capable of shielding for urine detection in urinary surgery, which relates to the technical field of urine detection and comprises a support, a sample storage unit is arranged on the top surface of the support, a sample collection unit is arranged at the input end of the sample storage unit and comprises a primary storage bin, and a secondary storage bin is arranged at the input end of the sample collection unit. The bottom surface of the initial storage bin is fixedly connected with a threaded opening, and the threaded opening is movably connected to the top surface of the sample storage unit; the urinal bowl is tightly attached to the excretion position of a user, it is guaranteed that the silica gel pad deforms and is tightly attached to the hip and the abdomen of the user through the special shape of the urinal bowl, the device can be suitable for users of different body positions, the user can excrete, urine is conveyed into the ureter through the funnel, and the urine is conveyed into the ureter through the funnel. A liquid separation plate in the transfer bin can enable the initial section of the urine to be conveyed into an initial section storage bin, so that impurities in the initial section are prevented from influencing a detection result.

The invention relates to the technical field of medical instruments, and provides a male anti-reflux urine bag sleeving structure with a reminding function, which comprises a urine sleeve, the bottom end of the urine sleeve is connected with a transition pipe through a buffer assembly, the bottom end of the transition pipe is connected with a urine conveying pipe, and the output end of the urine conveying pipe is connected with a urine bag body. A contraction bag opening is formed in the outer wall of the top end of the urine sleeve; the drawstring is arranged in the retractable bag opening, a clamping block is arranged at the middle end of the drawstring, a sliding rod is fixedly connected to the inner wall of the clamping block, a fixing assembly is arranged on the outer wall of the sliding rod, two fixing bands are fixedly connected to one end of the drawstring, and medical fixing patches are arranged on the outer walls of the fixing bands. The buffering assembly comprises a conical connecting pipe fixedly connected to the bottom end of the urine sleeve. The risk of fixation failure is avoided through linkage reminding of the double-lamination detection unit; urine backflow is reduced through the stepped channel design, the skin problem is reduced by matching with a comfortable material, and the wearing experience is improved.

The invention provides a sorbitol and mannitol flushing fluid for urinary surgery. The invention relates to a freeze-dried powder injection, which comprises 20 to 50 grams of sorbitol, 10 to 30 grams of mannitol, 5 to 10 grams of sodium bicarbonate and 0.5 to 2 grams of sodium citrate in every 1000 milliliters of the freeze-dried powder injection, and the pH value of the freeze-dried powder injection is adjusted to 7.2 to 7.4. The preparation method comprises the following steps: heating distilled water to 80 DEG C, sequentially adding the components, continuously stirring until the components are completely dissolved, cooling to room temperature, fixing the volume to 1000ml, adjusting the pH value by using a 5mol / L sodium hydroxide solution, finally sterilizing by using a 0.22-micron microporous filter membrane, and packaging in a sterilized glass bottle. The flushing fluid can effectively dissolve blood clots, stones and necrotic tissues in an operation field by utilizing the high osmotic pressure characteristics of the sorbitol and the mannitol, so that the operation field is kept clear. The flushing fluid disclosed by the invention shows an excellent flushing effect and good safety in urinary surgery operations such as transurethral bladder tumor electrocision, flexible ureteroscope calculus removal and the like.

The utility model belongs to the technical field of medical instruments, and particularly relates to a support tube for ureter skin stoma, which comprises a diversion catheter and a connecting portion, drainage holes are arranged on the diversion catheter, the diversion catheter comprises a middle tube body and a fixing portion, the middle tube body comprises a first tube body and a second tube body, and the first tube body and the second tube body are connected through the connecting portion. One in-vitro end of the first tube body is connected with one in-vitro end of the second tube body through the connecting part, the fixing part can deform, the fixing part extends outwards in the radial direction in the natural state, the connecting part is provided with a flow guide groove used for guiding and discharging urine out of the body, the stent of the structure does not need to go deep into the renal pelvis of a patient, and the risk of kidney infection of the patient is reduced; the support effect is achieved on the ureteral obstruction of the passing section caused by abdominal wall muscles and fat; meanwhile, operation is easy, replacement is convenient, and the workload of patients and medical staff is relieved.

Implementations of the present disclosure generally relate to medical aspiration devices and their methods of use. In some cases, the devices are configured to create a vacuum to capture and / or immobilize a solid deposit at a location internal to a subject. Such configurations may be useful, for example, for removing intact kidney stones small enough to pass through the ureter. In some cases, the devices further include an ablation instrument. Such devices may be useful, for example, for ablating larger solid deposits into a plurality of smaller particles at a location internal to the subject (e.g., ablating kidney stones that are too large to pass through the ureter). In some cases, the vacuum created by the devices is used to remove the plurality of smaller particles from the location internal to the subject.

The invention discloses a urine collection device for neonatal care. The urine collection device comprises a diaper, a urine collection assembly, a urine conveying pipe and a urine storage bag, the skin-friendly layer of the diaper is in contact with baby skin; the urine collection assembly comprises an annular positioning seat, a first wrapping structure and a second wrapping structure, and the annular positioning seat is arranged on the skin-friendly layer; the first wrapping structure is arranged on the annular positioning seat, a first root part of the first wrapping structure supports the first wrapping ring, and a flow guide channel is formed in the center of the first root part; the first wrapping ring can flexibly wrap the penis of the baby boy or can be attached to the private part of the baby boy so as to prevent urine from flowing back and overflowing; the second wrapping structure is arranged on the periphery of the first wrapping structure in a surrounding mode, and a second root of the second wrapping structure supports the second wrapping ring; the second wrapping ring is attached to the skin of the baby so as to secondarily seal the overflowing urine; urine enters the urine storage bag for storage through the flow guide channel and the urine conveying pipe; and the urine storage bag is provided with a sampling port for extracting urine. The purpose of the invention is to prevent urine from flowing back, so that the urine collection efficiency is improved.

The utility model discloses a medical sheath, and belongs to the technical field of medical instruments. Comprising a working sheath and a matching sheath, the matching sheath comprises a matching sheath tube and a matching sheath tube seat, the matching sheath tube seat comprises a fixing part, the matching sheath tube is connected to one end of the fixing part, a clamping column is arranged at the other end of the fixing part, the fixing part is axially provided with a hollow cavity with the inner diameter changing in a stepped mode, and the clamping column is axially provided with a through cavity with the inner diameter changing in a stepped mode. Detachable nuts are arranged at the ends, away from the fixing pieces, of the clamping columns. The working sheath is connected and matched with the matching sheath, an installation foundation is provided for the endoscope, the endoscope is integrated in the medical sheath, direct-view observation and real-time operation in the sheath entering process are achieved, the sheath entering difficulty and the ureter injury risk caused by a view blind area in traditional sheath entering operation are effectively solved, and the sheath entering efficiency is improved through real-time image feedback of the endoscope. An operator can adjust the sheath entering angle and force, the operation safety and success rate are improved, the medical sheath does not need ray assistance, and potential hazards of ray radiation to the operator and a patient are avoided.

The technology described herein is directed to methods of administering a therapeutic composition, such as recombinant adeno-associated virus (rAAV), to a kidney of a subject using a retrograde ureter route, for example, to at least renal papilla of the kidney. Such administration methods can be used to treat a kidney-associated disorder in a subject in need thereof. Also described herein are pharmaceutical compositions comprising a recombinant adeno-associated virus (rAAV) for administration to the kidney.

The utility model discloses a Y-shaped anti-adhesion bionic urine outflow channel which comprises a Y-shaped bionic outflow channel, and the Y-shaped bionic outflow channel comprises an A-area pipeline, a B-area pipeline and a C-area pipeline. The device disclosed by the utility model has the beneficial effects that a layer of mixture of silicone oil and PDMS (Polydimethylsiloxane) is coated on the inner layer of the Y-shaped silica gel pipeline subjected to 3D printing and is cured at high temperature, so that the silicone oil can be stably secreted on the inner surface, and the adhesion of urine crystals, blood and bacterial membranes is effectively resisted; a layer of microneedles capable of slowly releasing medicine is arranged on an outer-layer pipeline, connected with the ureter, of the device, the pipeline can be helped to be embedded with the ureter, medicine such as antibiotics and wound growth can be slowly released, and growth and healing of the embedded position are promoted; the device can be applied to radical bladder resection combined with urine flow diversion, and can replace the bladder of a patient and the intestinal tract needing to be resected for urine drainage.

The invention relates to the technical field of medicine, and discloses an auxiliary compression bed for intravenous pyelography, which comprises a compression bed body, bed frames are arranged on two sides of the compression bed body, a support seat is arranged at the bottom of the compression bed body, moving mechanisms are arranged on the two bed frames, and mounting blocks are arranged on the moving mechanisms. The two mounting blocks are each provided with a mechanical arm body and a protective shell, a transmission mechanism is arranged in each protective shell and used for driving the corresponding mechanical arm body to rotate, and the moving mechanisms are used for driving the mounting blocks to move. The transmission mechanism controls the mechanical arm body to rotate from the bottom of the compression bed body to the upper portion, through cooperation of the mechanical arm body, the position of the sponge plate can be adjusted and controlled, then the sponge plate is controlled to press downwards, and therefore flowing of contrast agents of the ureter and the bladder can be temporarily blocked, and it is ensured that structures such as the renal pelvis and the renal calyx are clearly developed; and a pressure sensor is arranged on the sponge plate, so that the pressure generated in the downward pressing process can be detected all the time.

The utility model relates to the technical field of medical auxiliary instruments, in particular to a novel uterine manipulator which is characterized by comprising a vertical rod and a sucker fixedly arranged at the top end of the vertical rod, the sucker and the vertical rod are coaxially arranged, and the sucker is used for being fixedly adsorbed to the atrophic cervix uteri and the front wall and the rear wall of the top vagina. The uterine manipulator can be used by a female patient with postmenopausal cervical atrophy, and can be fixedly adsorbed with the front wall and the rear wall of the atrophy cervix uteri and the front wall and the rear wall of the top end vagina through the suction cups, so that the atrophy cervix uteri and the top end of the vagina are fixed; gaps among the cervix uteri, the vagina, the bladder and the rectum can be fully expanded, and the risks that the operation difficulty is increased and the bladder, the ureter and the rectum are injured due to gap folding are avoided.

The utility model discloses a self-expanding umbrella-shaped extractor which comprises a handle. An outer pipe is fixed in the handle, and the outer pipe penetrates out of one end of the handle and extends to the outside; an inner pipe capable of moving in the axial direction of the outer pipe is arranged in the outer pipe, a blocking component is fixed to one end of the inner pipe, and a blocking film is arranged on the surface of the blocking component. The shape of the self-expanding umbrella-shaped ureteral calculus blocking and removing catheter can be accurately controlled manually, the self-expanding umbrella-shaped ureteral calculus blocking and removing catheter can be easily placed in a ureter, calculus cannot be pushed to retrograde to the kidney, ureteral wall damage cannot be caused, the opening diameter of the umbrella shape can be adjusted timely to completely block the ureter, and the catheter is convenient to use. The calculus and calculus fragments are effectively prevented from being flushed back into the kidney by perfusion water flow, the condition of calculus incarceration is not prone to occurring, deformation and ureter wall friction are not prone to occurring in the dragging and calculus removing process, all calculus can be taken out at a time, and the purpose of efficient calculus removal is achieved.

A urinary system calculus journey explanation model effectively solves the problem of inconvenient use of existing urinary system calculus journey explanation devices; including a support plate, the left and right sides of the front end of the support plate are respectively provided with a renal pelvis model, the front end of the support plate is provided with a bladder model located below the two renal pelvis models, the left and right sides of the front end of the support plate are respectively provided with ureter models located between the renal pelvis models and the bladder model, the upper end of the ureter model is communicated with the corresponding side of the renal pelvis model and the lower end is communicated with the bladder model, the lower end of the bladder model is communicated with a urethra model, a Y-shaped moving groove is opened on the support plate, the renal pelvis model, the ureter model, the bladder model and the urethra model are provided with a communication groove communicated with the moving groove, the left and right sides of the moving groove are respectively provided with front and rear axial sliding columns, and the front end of the sliding column is detachably connected with a calculus model; this structure is simple, novel in design, convenient to use and high in practicality.

The invention discloses a method for constructing a urinary tract infection domestic rabbit model, which comprises the following steps of: on the basis of catheter guidance, placing a ureteral catheter into a bladder through a urethra to manufacture a barrier-free artificial channel, then placing a spiral epidural catheter into the bladder through a ureteral catheter channel, and finally, placing the spiral epidural catheter into the bladder through the ureteral catheter channel. After Escherichia coli is injected through a ureteral catheter, a urethral orifice is quickly ligated with a silk thread, and the urethra is reopened after 2 hours. According to the invention, the condition of complicated urinary tract infection caused by common clinical calculi, foreign matter retention (stent tubes, ureters and the like) and the like can be simulated; compared with a ureter semi-ligation model, the method is relatively simple to operate, low in infection rate and high in repeatability; compared with a bladder direct injection bacterial model without laparotomy, the model has the advantages of typical pathological process and high and stable urinary tract infection success rate.

The utility model belongs to the field of ureter guiding sheaths, particularly relates to a ureter guiding sheath capable of reducing internal pressure of a renal pelvis and pressure of a bladder, and aims to solve the problems that when an existing guiding sheath injects water into a kidney during an operation, the pressure of the kidney is too large, water flows back into blood, infection risk is increased, and the operation time is prolonged. Liquid in the bladder is gradually increased, bladder pressure is increased, the bladder is overfilled, and the bladder function is damaged. According to the scheme, the catheter comprises a guide sheath tube, a bendable catheter is arranged at the front end of the guide sheath tube, a plurality of evenly-distributed second holes are formed in the outer portion, away from the bendable catheter, of the guide sheath tube, and a plurality of evenly-distributed first holes are formed in the outer portion of the front end of the bendable catheter and the outer portion of the front end of the guide sheath tube. Through the arrangement of the first hole and the second hole, liquid in the kidney and the bladder can be further drained out of the body through the liquid passing ability of the measuring holes, the pressure in the kidney and the pressure of the bladder are effectively relieved, and it is ensured that drainage is more sufficient and effective.

Implementations of the present disclosure generally relate to medical aspiration devices and their methods of use. In some cases, the devices are configured to create a vacuum to capture and / or immobilize a solid deposit at a location internal to a subject. Such configurations may be useful, for example, for removing intact kidney stones small enough to pass through the ureter. In some cases, the devices further include an ablation instrument. Such devices may be useful, for example, for ablating larger solid deposits into a plurality of smaller particles at a location internal to the subject (e.g., ablating kidney stones that are too large to pass through the ureter). In some cases, the vacuum created by the devices is used to remove the plurality of smaller particles from the location internal to the subject.

Embodiments of the present disclosure generally relate to medical aspiration devices and methods of use thereof. In some cases, the devices are configured to generate a vacuum to capture and / or immobilize solid deposits at a location within a subject. Such configurations can be useful, for example, for removing intact kidney stones that are small enough to pass through a ureter. In some cases, the devices further include ablation instruments. Such devices can be useful, for example, for ablating larger solid deposits into a plurality of smaller particles at a location within a subject (e.g., ablating a kidney stone that is too large to pass through a ureter). In some cases, the vacuum generated by the devices is used to remove the plurality of smaller particles from the location within the subject.

The invention provides a product and a method for detecting urinary tract epithelial carcinoma based on DNA methylation, and belongs to the technical field of urinary tract epithelial carcinoma detection, the product comprises reagents for detecting methylation of the following DNA regions: a PENK gene CpG island region Chr8: 56446618-56446724, a TMEM106A gene CpG island region Chr17: 43211685-43211847, and an OTX1 gene CpG island region Chr2: 63056808-63056956. Through joint detection of the target gene areas, accurate prediction of urothelial carcinoma is realized, and the kit has comprehensive coverage (bladder cancer, pelvis cancer and ureteral cancer) and detection advantages of early and low-grade cancers, can be used for early screening, postoperative recurrence monitoring, prognosis evaluation and other stages, and has a wide application prospect in the fields of early screening, postoperative recurrence monitoring, prognosis evaluation and the like. The positive significance is realized on the whole disease course management of the urothelial carcinoma.

Intravesical devices are provided that are wholly deployable within the bladder of a patient in need of treatment and are well tolerated by the patient. The device may include an elastic body having a retention shape having (i) dimensions that provide intravesical mobility and that prevent voiding of the medical device through the urethra, and (ii) dimensions, buoyancy, or both, that exclude the medical device from entering the orifices of the ureters. The elastic body may exert a maximum acting force less than 1 N when compressed to a shape with a maximum dimension in any dimension of 3 cm. The device may include a drug for controlled release within the bladder, for treatment of the bladder or a regional tissue. Methods of treatment are also provided that include selecting a patient in need of treatment in the bladder where tolerability of the treatment is a primary concern.

The utility model relates to the technical field of medical instruments, and discloses a tail wire ureteral stent which comprises a main body mechanism and an accessory mechanism, the upper end of the main body mechanism is fixedly connected with a renal pelvis connecting mechanism, and the lower end of the main body mechanism is fixedly connected with a bladder connecting mechanism; the pelvis connecting mechanism comprises a pelvis connecting pipe, a first support is fixedly arranged at the upper end of the pelvis connecting pipe, the bladder connecting mechanism comprises a bladder connecting pipe, and an oblique incision is fixedly formed in the lower end of the bladder connecting pipe. According to the utility model, the double-polypropylene silk thread is used for replacing the far-end ureter stent, the urine passing ability in the middle of the far-end material of the ureter is changed, the backflow of the bladder ureter is reduced, the postoperative symptom of stent implantation is reduced, and the tail-end silk thread is used for replacing the far-end ureter stent, so that the length of the far-end ureter stent can be long or short and can be customized privately; and the overall application range of the device is enlarged, and the overall practicability of the device is improved.

The invention discloses a Renal scoring method and device for kidney tumors, and belongs to the field of medical image processing. The method comprises the steps that segmentation data are acquired, and the segmentation data comprise data of kidneys, tumors and blood vessels; anatomical analysis is carried out based on the segmentation data, the kidney principal axis, the renal pelvis position and the ureter are determined, and a natural coordinate system of the kidney is established; calculating the maximum diameter of the tumor based on the tumor voxel, and determining an R score according to the maximum diameter of the tumor; constructing a kidney convex hull based on the kidney parenchyma coordinates, and determining an E score based on the proportion of tumor voxels inside and outside the kidney convex hull; taking the ureter as a set system, determining the minimum distance from the tumor voxel to the set system, and determining an N score according to the minimum distance; constructing a natural interface based on the pelvis position, and determining an A score based on the natural interface; detecting polar lines based on the renal door depression, and determining an L score according to the polar lines. The method provided by the invention eliminates the subjective judgment difference of the scorer.

The utility model discloses an anti-reflux ureteral stent, which belongs to the technical field of ureteral stents and comprises a stent pelvis section, a stent ureteral section and a stent bladder section. At least one hollow expansion part is arranged on the tube wall of the bladder section of the stent, and an integrated anti-reflux valve is arranged in a tube cavity of the expansion part. The valve is composed of a plurality of valve-shaped structures, the free ends of the valve-shaped structures can be close to each other to seal a lumen when subjected to retrograde liquid pressure from the bladder to the kidney, the free ends of the valve-shaped structures are separated from each other to open the lumen when subjected to forward liquid pressure from the kidney to the bladder, and therefore one-way drainage of urine is achieved. The anti-backflow urine bag is simple in structure and capable of effectively preventing backflow of urine and complications such as lumbago and hydronephrosis caused by backflow of urine. Meanwhile, due to the structure of the expansion part, the valve can be completely attached to the wall when opened, and operation smoothness and safety are guaranteed when a guide wire is placed in.

The invention provides an anti-reflux ureteral stent, and relates to the technical field of medical instruments. The anti-reflux ureteral stent comprises a main tube, a first composition part and a second composition part, wherein the first composition part and the second composition part are arranged at the two ends of the main tube; the main pipe is internally provided with a flow choking device for preventing urine from flowing backwards; the flow choking device comprises a containing pipe and an elastic bag; the outer diameter of the containing pipe is smaller than the inner diameter of the main pipe. A capillary core is arranged in the containing pipe and used for draining part of urine flowing back into the main pipe from the second composition part into the elastic bag through the capillary action, so that the elastic bag is deformed; the elastic bag is used for separating the main pipe when the maximum radial size of the elastic bag reaches the preset size. According to the anti-reflux ureteral stent, the effect of actively preventing reflux of urine is achieved by utilizing the capillary phenomenon.