79 results about "Ureteroscopes" patented technology

A stone capture device comprises a shaft with a deployable sweeping structure at its distal end. The shaft is adapted to be removably placed over and connected to a conventional ureteroscope. The combination of the stone capture device and ureteroscope can be introduced into the urinary tract to capture, fragment, and remove stones from the bladder and kidney.

A device for extracting (or inserting) objects from the body, such as urinary stones, using a low pressure inflatable toroidal balloon that serves to engulf the object during extraction (or insertion) while dilating and protecting the passageway. The balloon loads onto an ureteroscope prior to insertion, rather than through the ureteroscope as do existing balloons. The toroidal balloon is a simple and unique device that may be applied external to the extracting telescope and does not interfere with existing methods for stone manipulation such as laser lithotripsy, irrigation and basket extraction in the case of urinary stone manipulation.

The invention relates to the technical field of a medical instrument, particularly to ureteroscope with a flexible end and a retractable sheath, which is used for diagnosis and treatment of urinary system diseases. The ureteroscope comprises the retractable sheath (1) and an endoscope (2), wherein the retractable sheath (1) is a columnar hollow conduit provided with a retractable sheath handle (1.1) at the end above, a bushing port (1.2) matched with two limiting balls (2.3) on the endoscope (2) is arranged inside the retractable sheath handle, and the endoscope (2) is constituted by an eyepiece (2.7), a focal length adjusting knob (2.6), a light guide bundle interface (2.5), a gyration radius adjusting switch (2.8), a lens deflection direction adjusting knob (2.9) and a lens (2.4). The ureteroscope has the advantages that both the gyration radius and the bending angle of a flexible section (2.11) at the end of the endoscope can be adjusted according to needs so as to realize safe and efficient diagnosis and therapeutic surgery on the urinary system diseases related to ureter, pelvis and kidney calyces.

A method for creating a tract for nephrostomy tube creation comprising the steps of providing a puncture wire having a tissue penetrating tip shielded in a sheath, the puncture wire slidable within the sheath and releasably lockingly engaged thereto, inserting the puncture wire and sheath in a first direction through a working channel of an ureteroscope to exit the channel of the ureteroscope, releasing the puncture wire from the sheath and advancing the puncture wire a first distance from the sheath while visualizing via the ureteroscope the position of the puncture wire, advancing the puncture wire and the sheath into a selected calyx and through a flank of a patient, removing the puncture wire from the sheath in a second direction different from the first direction and inserting a guidewire through the sheath.

A method for creating a tract in retrograde fashion for nephrostomy tube creation comprising the steps of providing a puncture wire having a tissue penetrating tip shielded in a sheath, inserting the puncture wire and sheath through a channel in an ureteroscope, advancing the puncture wire from the sheath while visualizing under direct vision a position of the puncture wire, advancing the puncture wire through a selected calyx, and inserting antegrade a coaxial catheter over the puncture wire.

Disclosed is a combined rigid ureteroscope which comprises a rigid ureteroscope body and a tubular sheath outwardly fitted on a tubular part of the ureteroscope body. A starting end of the sheath is closely engaged with the tubular part of the ureteroscope body. A locking mechanism is provided at a rear end of the sheath. A locking part is provided between the tubular part of the ureteroscope body and an operation part of the ureteroscope body. The locking mechanism is cooperated with the locking part to lock or unlock the rigid ureteroscope body and the tubular sheath. In operations of examining, diagnosing and treating the ureter and the kidney by employing this invention, it saves operation procedures, shortens operation time, improves operation safety, avoids problems of difficult operation and easy damage of the flexible ureteroscope, and realizes safety, effectiveness and low cost in the clinical treatment.

The invention provides a ureteral stone movement plugging device. The ureteral stone movement plugging device consists of a catheter (1), an expandable compressed airbag (2) and a valve (3), wherein the catheter (1) adopts a hollow long tubular structure with elasticity and is made of elastic silica gel or latex; an opening is formed in the front end of the catheter (1); the opening is positioned inside the expandable compressed airbag (2); the expandable compressed airbag (2) is arranged at the front end of the catheter (1), and in the expanded state, the expandable compressed airbag (2) is ellipsoid-shaped; the valve (3) is positioned at the tail end of the catheter (1), and a syringe connecting port (4) is formed in the valve (3). The front section of the catheter (1) of the ureteral stone movement plugging device can enter a ureter through an operating chamber of a ureteroscope to relatively fix the airbag (2) into a ureteral cavity at the upstream of a stone or at an outlet of a renal pelvis, so that a kidney filling and expanding destructive effect of a water flow injected by the ureteroscope is eliminated and any passage through which the stone may move or escape into the renal pelvis is completely blocked.

The invention relates to a hard lens calculus removing device, which is of a double-sheath structure. A conical guide head is arranged at a far end of an inner sheath, can enable an outer sheath to be smoothly guided into a cavity (including inner and outer bile duct antrums of a liver, a bile duct antrum, a cholecyst antrum and a renal pelvis) and avoids damage of the outer sheath on circumferential tissues and a fistula wall. Elastic and tensile tissues are arranged around fistula, a lumen and an incision, the fistula and the lumen are in half-closing state when being not filled by liquid, and the diameters of the fistula and the lumen are smaller than the diameter of the outer sheath, thus tissues by the side the incision, the fistula wall, the lumen or a cyst wall surround and extrude the outer sheath so as to realize a seal effect and avoid overflow of internal liquid in the lumen and a cyst antrum. After the hard lens calculus removing device is guided into the lumen, the inner sheath is pulled out and the outer sheath is reserved. A Y-shaped joint is arranged on the outer sheath, and calculus surged along with water is conveniently discharged into a collection bag through a side hole of the Y-shaped joint. Due to a protection function of the outer sheath, various hard endoscopes, including oledochoscopes, hard lenses or percutaneous nephroscope set, and ureteroscope are indirectly in contact with soft tissues by the sides of a kidney fistula wall and a cholecyst incision, thus the damage on incision circumferential tissues, the fistula wall and a lumen wall due to repeated insertion and extraction of the endoscopes and devices is basically avoided, and the safety of an operation is improved.

The invention discloses a negative pressure adjusting device connected with a ureter sheath. The negative pressure adjusting device comprises a sealing connector connected with the tail end of the ureter sheath; the interior of the sealing connector is hollow to form a cavity; a connecting opening communicated with the ureter sheath, a negative pressure connecting-in opening connected with a negative pressure suction device, a ureteroscope body connecting-in opening for a ureteroscope to penetrate and an air inlet provided with an air inlet adjusting valve are formed in the sealing connector; the negative pressure in the cavity is adjusted through the air inlet adjusting valve by changing the size of an air flow channel between the cavity and the atmosphere; a sealing cover is arranged at the position of the ureteroscope body connecting-in opening; and an elastic sealing hole in sealing fit with the tubular outer wall of the ureteroscope is formed in the sealing cover. By means of the negative pressure adjusting device, liquid injected into a kidney collecting system through the ureteroscope can be rapidly sucked out; the pressure of the kidney collecting system is effectively controlled; injuries of the high pressure of the kidney collecting system to patients are avoided; meanwhile, calculus powder and disintegrated slag generated in an operation can be rapidly sucked out; the operation view definition is improved; the operation efficiency is higher; the operation time is shorter; and the operation safety performance is greatly improved.

A transducer is used to send an ultrasound pulse toward a stone and to receive ultrasound reflections from the stone. The recorded time between a pulse that is reflected from the proximal surface and a pulse that is reflected either from the distal surface of the stone or from a surface supporting the stone is used to calculate the stone size. The size of the stone is a function of the time between the two pulses and the speed of sound through the stone (or through the surrounding fluid if the second pulse was reflected by the surface supporting the stone). This technique is equally applicable to measure the size of other in vivo objects, including soft tissue masses, cysts, uterine fibroids, tumors, and polyps.

A ureteroscope system includes a handle including a first port and a second port and an elongated shaft extending from the handle to a distal end and including a shaft lumen open at the distal end of the shaft. The shaft is be inserted through a bodily lumen to a target surgical site. The first port is in communication with a handle channel which is in communication with the shaft lumen and the second port is in communication with a working channel extending through the handle and the shaft lumen to the distal end of the shaft. The system also includes a fluid source connected to the first port and pumps fluid through the handle channel and the shaft lumen to irrigate the site and a vacuum source connected to the second port and applies suction through the working channel to dislodge debris from the site.

The invention discloses a novel blocking type calculus removing catheter. The novel blocking type calculus removing catheter comprises a catheter body, wherein a first plug and a second plug used for sealing the catheter body are arranged at the two ends of the catheter body, and an expansion airbag is arranged at the end, close to the first plug, of the catheter body. The unexpanded expansion airbag is stretched into the near end of a ureter behind calculi firstly, then liquid is injected into the catheter body precisely through a spiral injector, the expansion airbag is precisely expanded to an ideal radius according to the scale marks of the spiral injector based on preopreative examination to block the near end of the ureter so that calculi can be prevented from escaping, and scale marks are arranged at the tail end of the catheter body so that the depth of the catheter body can be observed clearly; the expansion air bag expands in the eccentric direction, the surface of the catheter body is coated with color so that the expansion direction of the expansion airbag can be identified conveniently, and ureteroscopic lithotripsy is not affected after setting is successful. The novel blocking type calculus removing catheter is simple in structure, convenient to use, low in application cost and capable of reducing surgery cost for patients greatly.

The invention relates to a plugging device capable of injecting hydrogel for ureteroscope lithotripsy, comprising a syringe, a conduit, a semipermeable membrane, a hydrogel and a metal guidance wire; the semipermeable membrane is wrapped inside the outer surface of the conduit to form a capsular plugging capsule; the plugging capsule is in sealing connection with the conduit; the side wall of the conduit arranged inside the plugging capsule is provided with at least one through hole; one end of the conduit is sealed; the opening end of the conduit is communicated with the syringe; and the sealing end of the conduit is connected to the metal guidance wire. The plugging device used for the ureteroscope lithotripsy can prevent calculus inside the ureter from going up, provides convenience to surgery, reduces tissue damage and has high success rate in plugging broken stones.

Processes of localizing target papillas of renal anatomy involve advancing a ureteroscope to a target calyx of a kidney of a patient through at least a portion of a urinary tract of the patient, determining a positional offset between one or more position sensors associated with the ureteroscope and a target papilla of the kidney that is at least partially exposed within the target calyx, and determining a percutaneous access target based at least in part on one or more of a present position of the one or more position sensors and the offset.

The invention discloses a device for treating bladder calculi. The device comprises a ureteroscope component and a prostate resectoscope component, wherein the inner cavity at one end of the prostate resectoscope component is connected with a water seal cap; and the inner cavity of the water seal cap is inserted into the ureteroscope component through an inner sheath of the prostate resectoscope component. The device disclosed by the invention has simple structure and low manufacturing cost, is convenient to operate, and makes full use of the combination of the existing medical instruments and a water seal cap; and the device offers a clear visual field in a continuous perfusion surgery, and realizes safe and quick surgery operation and high efficiency. The device is suitable for the bladder calculi lithotripsy.

The invention relates to a nested flexible ureteroscope. The nested flexible ureteroscope comprises a rod-shaped optical fiber scope provided with a long-fiber-shaped image transmitting scope body, atubular handheld handle and a bendable sheath, wherein the tubular handheld handle and the bendable sheath are communicated with each other. An image-transmitting optical fiber is arranged in the scope body, and a driving steel wire for controlling the bending extent of the bendable sheath is inserted into the bendable sheath; a windowing sliding groove is formed in the outer wall face of the handheld handle in the length direction of the handheld handle, a bending-causing pushing handle is slidingly arranged on the windowing sliding groove and connected to the proximal end of the driving steel wire, and the distal end of the driving steel wire and the side wall of the bendable sheath are fixed; the optical fiber scope is inserted into the handheld handle through an optical-fiber-scope insertion hole in the tubular tail end of the handheld handle, and the scope body is inserted into the bendable sheath. The nested flexible ureteroscope has the advantages that the structure is easy andconvenient, the cost is low, operation is convenient, an additional scope sheath product is avoided, and the nested flexible ureteroscope can be applied to various surgeries for which ureteroscopes and flexible ureteroscopes are suitable.

The invention provides a continuous negative-pressure suction apparatus for ureteroscopic holmium laser lithotripsy use. The continuous negative-pressure suction apparatus for ureteroscopic holmium laser lithotripsy use comprises a three-way infusion device, a liquid suction hose, a ureteral catheter, a first sealing cap, and a second sealing cap; one end of the three-way infusion device is sleeved with the liquid suction hose; the ureteral catheter is fixedly mounted at one end of the three-way infusion device, and communicates with the three-way infusion device; and a junction of the three-way infusion device and the ureteral catheter is sleeved with the first sealing cap. The continuous negative-pressure suction apparatus for ureteroscopic holmium laser lithotripsy use provided by the invention has the advantages of being low in cost, convenient to use, and capable of maintaining good field of view, improving lithotripsy efficiency, shortening operation time, preventing stone from moving up, increasing stone clearance rate, reducing renal pelvis pressure, reducing risk of infection, decreasing possibility of falling of the liquid suction hose due to pulling of the liquid suctionhose, ensuring smooth conduction of the operation and the like.

The invention relates to a ureteroscope urinary bladder pressure reducing device. The pressure reducing device comprises an outer sheath and an inner core; the inner core is arranged in the outer sheath; the far end of the inner core extends out of the outer sheath; the near end of the inner core is clamped on the end portion of the outer sheath; a telescopic device is arranged at the far end of the outer sheath; a base is arranged at the near end of the outer sheath; a side pipe is arranged on the base; a regulator is connected to the side pipe; a clamping groove is formed in the regulator; the two ends of the telescopic device are closed up towards the middle to form a protrusion when the telescopic device is in a contraction state; the outline face of the protrusion is an arc-shaped face. The ureteroscope urinary bladder pressure reducing device has the advantages that the pressure reducing of the urinary bladder is achieved through the modes that liquid in the urinary bladder is released through the outer sheath, and meanwhile the opening and the closing of a liquid outlet is controlled through the regulator, repeat mirror returning is not needed, and the facts that the pressure in the urinary bladder is too high or the injure of the urinary bladder occurs caused by the continuous increase of the liquid in the urinary bladder are avoided; the inner core controls the contraction and the recovery of the telescopic device, the operation is simple, and the minimally invasive injure is small; the inner core is arranged in the outer sheath in a penetrating mode before and after an operation, dredging and guiding functions are achieved, and the outer sheath can be prevented from being blocked.

The invention discloses an improved reclining lithotomy position percutaneous nephrolithotomy, which relates to medical instruments. The existing percutaneous nephroscopic surgery needs to change the surgical position, which leads to prolonged operation time, increased anesthesia risk, and labor intensity of medical staff. increase and decrease patient comfort. It includes the operating table, a set of percutaneous puncture and dilation equipment, ureteroscope, percutaneous nephroscope, cold light source, camera system, bedside B-ultrasound machine, intracavitary stone removal equipment, pressure-regulating water pump, and holmium laser.