1574results about "Dilators" patented technology

Disclosed is a negative pressure suction sheath, comprising a sheath tube (1), a negative pressure connector (2), and a dilator (3). The negative pressure connector (2) comprises a main channel cavity (201) and a negative pressure suction channel cavity (202) located on one side of the main channel cavity (201). A proximal end of the sheath tube (1) is connected to a distal end of the main channel cavity (201). The dilator (3) is inserted from a proximal end of the main channel cavity (201) and extends out of a distal end of the sheath tube (1) and is detachably connected to the main channel cavity (201). A side channel port (205) is formed on one side of the main channel cavity (201), and the negative pressure suction channel cavity (202) is in communication with the side channel port (205). A cavity wall of the main channel cavity (201) is further provided with a pressure regulating port (203). The pressure regulating port (203) is arranged corresponding to the side channel port (205) or is located at one end of the side channel port (205) distal to the sheath tube (1), and the magnitude of the negative pressure in the sheath tube (1) can be adjusted by adjusting the opening size of the pressure regulating port (203).

The invention provides a balloon dilatation catheter, and belongs to the technical field of balloon dilatation catheters. The balloon dilatation catheter comprises a catheter body, the far end of the catheter body is provided with a balloon body used for dilating a narrow part, and the near end of the catheter body is provided with an operating handle used for charging and discharging a filling medium into the balloon body. A flow channel allowing blood to penetrate through is formed in the balloon body and / or between the balloon body and the outer side wall of the catheter body in the axial extending direction of the catheter body, in the working process, after the balloon body is filled, a narrow part is treated, and the blood in the narrow part penetrates through the flow channel to continue to be circulated. The balloon is mainly used for solving the technical problems that in the prior art, when a balloon dilates, blood flow is blocked, consequently, far-end blood supply is insufficient, and the drug transfer effect is affected due to insufficient contact time of the balloon and the blood vessel wall.

To provide a device and a method for treating at least one of hypertension, pulmonary arteries, diabetes, obesity, heart failure, end-stage renal disease, digestive disease, urological disease, cancers, tumors, pain, asthma or chronic obstructive pulmonary disease by delivering an effective amount of a formulation to a tissue.SOLUTION: In embodiments of the present invention, the formulation may include at least one of a gas, a vapor, a liquid, a solution, an emulsion or a suspension of one or more ingredients. In embodiments of the present invention, amounts of the formulation and / or energy are effective in injuring or damaging tissue, nerves and nerve endings in order to relieve disease symptoms.SELECTED DRAWING: Figure 3B

A catheter system can include a tubular body, and at least one of a targeting system coupled to the tubular body, an expandable member, or a fluid injection port. A method of identifying a bifurcation can include inserting a catheter system into a first vessel, positioning the catheter system at a first location, expanding an expandable member to occlude the first vessel, delivering contrast material so the contrast material pooling proximate to the expandable member, and reviewing a shape of the contrast material in the first vessel under fluoroscopy.

There is provided an introducer system for percutaneously delivering a first and a second medical device to a patient. The system may comprise an introducer sheath having a longitudinal axis and a lumen formed therein. The system may also comprise a bifurcated hub coupled to a proximal end of the sheath. The hub may comprise a first arm having a first lumen and a first hemostasis valve for the passage of the first medical device. The hub may also comprise a second arm coupled to the first arm and having a second lumen and a second hemostasis valve for the passage of the second medical device. Further, the hub may comprise a connection port such that the first lumen and the second lumen are in communication with the lumen of the introducer sheath for the passage of at least one of the first and second medical devices through the introducer sheath for delivery to the patient.

The disclosure generally related to improved introducer sheaths for insertion into the body to provide intravascular access to various medical devices, involving an introducer sheath capable of insertion while providing resistance to frictional forces which may otherwise cause the unintentional compression of the outermost layer of the sheath. Embodiments generally comprise an introducer sheath comprising a circumferentially continuous elastomeric outer layer and a support element. Systems for protecting a luminal surface of a blood vessel are described herein. Also provided herein are methods for the use of these systems. Further, these systems include an elongated sleeve having a proximal opening and a circumferentially continuous elastomeric outer tube, the circumferentially continuous elastomeric outer tube has a smooth inner surface with a substantially round cross-section and includes one or more support elements extending longitudinally from the distal opening towards the proximal opening.

An expandable introducer sheath with an interlock dilator. The present technology provides an expandable sheath with a step feature inside its distal opening, and a dilator with an interlock that includes a catch surface configured to engage with the step feature and resist further relative movement so that the body of the dilator is prevented from exiting the distal end of the expandable sheath. This interlocking engagement may allow the dilator to be used to extend and maintain tension on the expandable sheath during insertion into a patient, and then to be retracted from the expandable sheath by pulling the dilator in the opposite direction. The present technology also provides a dilator hub with a spring mechanism configured to achieve and maintain a desired tension on the expandable sheath and to prevent overextension of the expandable sheath when the dilator is being inserted into the expandable sheath.

A catheter system can include a tubular body, and at least one of a targeting system coupled to the tubular body, an expandable member, or a fluid injection port. A method of identifying a bifurcation can include inserting a catheter system into a first vessel, positioning the catheter system at a first location, expanding an expandable member to occlude the first vessel, delivering contrast material so the contrast material pooling proximate to the expandable member, and reviewing a shape of the contrast material in the first vessel under fluoroscopy.

The invention discloses a constipation patient defaecation device and mobile terminal integrated system based on endoscope visualization and air bag assistance, and relates to the technical field of medical instruments, the constipation patient defaecation device comprises a display terminal, a connecting line, an operating handle and a comprehensive pipe, and the two ends of the operating handle are connected with the connecting line and the comprehensive pipe respectively. According to the non-invasive, high-safety and portable constipation patient defecation device, through the integrated design of endoscope real-time visual positioning, air bag auxiliary mechanical defecation and mobile terminal data interaction, the invasive operation pain is reduced, the defecation time is shortened, the complication risk is reduced, and the constipation patient defecation efficiency is improved. The pressure sensor monitors the internal pressure of the air bag in real time and feeds back the internal pressure to the dynamic pressure upper limit module and the mobile terminal in real time, and double protection of a hardware pressure release valve and software pressure limiting is triggered when the pressure exceeds the limit. The problems of high intestinal injury risk, low treatment efficiency, limited application scene and the like caused by operation blindness, function singleness or high invasiveness in the prior art are solved.

A method of diverting fluid flow from a first vessel including an occlusion to a second vessel includes deploying a prosthesis at least partially in a fistula and making valves in the second vessel incompetent. Making the valves in the second vessel incompetent includes at least one of using a reverse valvulotome to cut the valves, inflating a balloon, expanding a stent, and lining the second vessel with a stent.

An access device for accessing an intervertebral disc having an outer shield comprising an access shield with a larger diameter (˜16-30 mm) that reaches from the skin down to the facet line, with an inner shield having a second smaller diameter (˜5-12 mm) extending past the access shield and reaches down to the disc level. This combines the benefits of the direct visual microsurgical / mini open approaches and the percutaneous, “ultra-MIS” techniques.

The invention discloses a perfusion mastoid balloon and a balloon dilatation catheter, and relates to the technical field of medical instruments. The perfusion mastoid balloon comprises a balloon main body, mastoids and a fluid channel, the mastoid process and the balloon main body are integrally formed or separately formed; the fluid channel is formed in the peripheral wall of the balloon body and extends in the length direction of the balloon body to allow liquid to pass through, and the size of the fluid channel in the radial direction of the balloon body is smaller than or equal to the size of the mastoid in the radial direction of the balloon body. The structure of the perfusion mastoid balloon is improved, the expansion time of the perfusion mastoid balloon is effectively prolonged, a narrow area can be better expanded, and meanwhile blood vessel blockage is avoided.

A transseptal needle or punch. The transseptal punch includes a stylet with a tube with a side window and a cutting wire disposed within the tube, with a sharp cutting segment disposed proximate the window. The sharp cutting segment can be expanded radially outwardly from the window by translation of the cutting wire proximal end within the tube.

The invention belongs to the technical field of medical instruments, and particularly relates to a portable pneumothorax catheterization device compact in structure and efficient in operation. The portable pneumothorax catheterization device comprises a puncture mechanism, an auxiliary fixing assembly and an adjusting assembly are arranged on the puncture mechanism, and a drainage tube is detachably connected into the puncture mechanism; the end, away from the puncture mechanism, of the drainage tube is connected with the collection bottle, a one-way valve is arranged at the end of the drainage tube, a through hole and a flowing groove are formed in the end, away from the one-way valve, of the drainage tube, and a thin tube is arranged in the drainage tube and communicated with the air bag. According to the safe and reliable portable pneumothorax catheterization device, a supporting cylinder, a limiting block and a reset spring of the puncture mechanism are linked, a puncture needle can be driven to stretch out for puncture by rotating the supporting cylinder, catheter propelling is synchronously completed, and traditional tedious steps such as puncture and incision are omitted; auxiliary instruments such as scissors and pliers are not needed, the problem that a traditional process is complex is solved, the method is suitable for emergency scenes such as pre-hospital first aid and field rescue, and time is won for rescue.

The invention discloses a balloon dilatation catheter, and relates to the technical field of interventional therapy instruments, the balloon dilatation catheter comprises a catheter, a bearing, an anchoring balloon and a nicked balloon, the bearing comprises a bearing inner ring connected with the catheter, and a bearing outer ring sleeving the periphery of the bearing inner ring and capable of circumferentially rotating relative to the bearing inner ring; the anchoring balloon is connected to the bearing outer ring and can expand in the radial direction relative to the catheter, and the anchoring balloon can be anchored in the blood vessel in the expansion state; the nicking balloon is located at the far end of the anchoring balloon and can expand in the radial direction relative to the catheter, and the nicking balloon can conduct extrusion nicking on plaques on the inner wall of the blood vessel in the expansion state. Due to the fact that the bearing outer ring and the bearing inner ring can relatively rotate in the circumferential direction, when the anchoring balloon is anchored, the catheter can rotate relative to the anchoring balloon, the deflection angle of the nicking balloon can be adjusted by rotating the catheter, the nicking balloon can conduct extrusion nicking on plaques at different positions in the circumferential direction of the inner wall of a blood vessel in the multiple nicking processes, and the nicking effect is improved. And the dilation effect of the balloon dilatation catheter on vascular stenosis is improved.

A method of diverting fluid flow from a first vessel including an occlusion to a second vessel includes deploying a prosthesis at least partially in a fistula and making valves in the second vessel incompetent. Making the valves in the second vessel incompetent includes at least one of using a reverse valvulotome to cut the valves, inflating a balloon, expanding a stent, and lining the second vessel with a stent.

The utility model is suitable for the technical field related to medical instruments, and provides a valve auxiliary system sheath which comprises a shell assembly and a catheter sheath tube arranged on the shell assembly. The bending adjusting handle is used for adjusting the angle of the tail end of the catheter sheathing canal, and the bending adjusting handle is connected with the shell assembly; the catheter sheath is used for being matched with the catheter sheath tube to achieve introduction of an interventional instrument or conveying of an auxiliary instrument; the flushing valve is used for conveying medicaments, and the flushing valve is communicated with the catheter sheath through an extension tube body; the catheter sheath tube, the catheter sheath, the flushing valve and other components are arranged in a matched mode, so that the dilator can be always kept in the catheter sheath tube in the original position in the process that the catheter sheath tube enters the access blood vessel of a patient, blood cannot permeate out of a product, use is convenient, and the valve positioning accuracy and the operation safety are effectively improved.

An improved ureteral sheath, includes: an introducer sheath including a sheath tube and a sheath base arranged at a proximal end of the sheath tube, the sheath base is provided with a tube segment in communication with the sheath tube and a connecting part arranged at a distal end of the tube segment; the sheath tube is provided, from a proximal end to a distal end thereof, with a main body segment and a head segment arranged at a distal end of the main body segment, the main body segment is composed of a hard tube segment, and the head segment is composed of a deformable tube segment; and the tube segment extends outwards relative to a central axis thereof in a communication manner to form a negative pressure connecting tube, a tube wall of the negative pressure connecting tube is provided with vent groove.

A method of diverting fluid flow from a first vessel including an occlusion to a second vessel includes deploying a prosthesis at least partially in a fistula and making valves in the second vessel incompetent. Making the valves in the second vessel incompetent includes at least one of using a reverse valvulotome to cut the valves, inflating a balloon, expanding a stent, and lining the second vessel with a stent.

A catheter system can include a tubular body, and at least one of a targeting system coupled to the tubular body, an expandable member, or a fluid injection port. A method of identifying a bifurcation can include inserting a catheter system into a first vessel, positioning the catheter system at a first location, expanding an expandable member to occlude the first vessel, delivering contrast material so the contrast material pooling proximate to the expandable member, and reviewing a shape of the contrast material in the first vessel under fluoroscopy.

The invention discloses a mastoid balloon and a balloon dilatation catheter, and relates to the technical field of medical instruments. The mastoid balloon comprises a balloon main body, an expandable body and a plurality of bulges, the expandable body is arranged on the peripheral wall of the balloon main body and extends along the length direction of the balloon main body, and the expandable body is provided with a fluid inlet for introducing fluid and a fluid channel communicated with the fluid inlet, so that the expandable body can expand or contract under the action of the fluid; the protrusions are arranged on the expandable body and distributed at intervals in the length direction of the expandable body. The convex point structure of the mastoid balloon is improved, the height of the convex points can be adjusted, the balloon is effectively prevented from sliding when a stenosis lesion is expanded, and the treatment effect and efficiency are improved.

Embodiments of the present invention provide devices and methods for treating at least one disease by delivering an effective amount of energy and / or an agent to tissue on or near a body cavity wall. The agent may include at least one of a gas, vapor, liquid, solution, emulsion, suspension, or a combination thereof of one or more components. The amount of agent and / or energy delivered is effective to damage or injure tissue, nerves, and / or nerve endings to alleviate disease symptoms.

The invention relates to the technical field of vaginal irrigation flow rate control, in particular to a vaginal irrigation expansion control method based on multi-modal data. The method comprises the following steps: acquiring pelvic floor electromyographic signals, pH values and flushing flow velocity data of a patient in a vaginal flushing expansion process; the myoelectricity influence degree of the current patient is obtained according to the pelvic floor myoelectricity signals and the flushing flow speed data of the matched historical patient of the current patient in the flushing expansion stage; obtaining the pH influence degree of the current patient according to the difference between the pH value of the current patient at each moment and the normal pH value range of the vagina and the change condition of the pH value in the preset domain time period at each moment; according to the myoelectricity influence degree and the pH influence degree, the flow speed adjusting weight of the current patient is obtained in real time, and the flushing flow speed of the current patient in the vagina flushing expansion process is controlled. The flow rate adjusting weight is accurately obtained in real time, so that the flushing flow rate is accurately adjusted, and the vagina is effectively prevented from being damaged in the flushing expansion process.

The invention discloses a safe ureter dilatation guide wire system and a progressive pressure control method, and relates to the technical field of medical instruments.The safe ureter dilatation guide wire system comprises a guide wire body and a pressure sensor, the guide wire body comprises a water bag structure and a double-cavity structure which are communicated, the water bag structure is made of an elastic structure, and the double-cavity structure is made of an elastic material; the interior of the water bag structure is used for being filled with expansion liquid and expanding according to the target volume so as to expand the narrow position of the ureter. A guide wire cavity and a liquid injection cavity which are independently arranged are formed in the double-cavity structure, the guide wire cavity and the liquid injection cavity are both communicated with the water bag structure, the guide wire cavity is used for allowing the identification light source to penetrate through, and the liquid injection cavity is used for providing expansion liquid for the water bag structure; the pressure sensor is installed outside the water bag structure so as to detect the pressure of the inner wall tissue of the ureter in real time. According to the technical scheme, the problem that an existing ureter guide wire cannot monitor the deformation state of narrow tissue in real time is solved.

A method for enhancing health quality and performance is disclosed. The method involves providing multiple sets of nasal dilators, each set having a distinct configuration. The dilator set being used is then identified. The health quality / performance of the user using the identified set of nasal dilators is then monitored using a health quality / performance monitoring and feedback system. Additionally, the health quality / performance monitoring and feedback system provides feedback on the user's health quality / performance based on the identified set of nasal dilators. This method allows for personalized and targeted improvement of health quality and performance by optimizing the use of nasal dilators.

The visual balloon type urethral dilation device comprises a urethral endoscope and a balloon dilator arranged in the urethral endoscope in a penetrating mode, and the urethral endoscope and the balloon dilator are matched with the urethra of the human body. The observation field of view of the urethra endoscope covers the dilation balloon of the balloon dilator, and visual dilation of the dilation balloon is achieved. The balloon dilator is provided with an independently-controlled fixing balloon, the fixing balloon and a balloon-shaped cavity in the urethra endoscope probe form a detachable fixing structure, the balloon dilator can penetrate through a middle shaft of the probe to move axially when fixing is removed, and the guiding function of the probe is achieved. The balloon dilator can be used in a disposable mode, and cross infection is prevented. And the probe is provided with a panoramic camera and a light supplementing lamp which are symmetrical, so that the visualization precision is improved. The urethra dilatation operation accuracy, safety and diagnosis and treatment efficiency are greatly improved from the aspects of high visualization, dilatation precision adjustment and the like.

The invention relates to the technical field of minimally invasive vascular interventional operations, in particular to an adjustable balloon expansion pressure pump and an intelligent control method thereof.The method comprises the steps that a real-time image of a connecting pipe is obtained based on perspective imaging equipment, positioning information of a marker in the connecting pipe is recognized, and an initial parameter set is generated; constructing a fluid model according to the initial parameter set, and generating a fluid parameter set by taking distance information between the first identification body and the second identification body as a constraint condition; controlling pump body output pressure according to the fluid parameter set to generate a pre-expansion parameter set; the fluid model is updated based on the pre-expansion parameter set, the pump body is controlled to execute a pressure instruction in the dynamic pressure sequence, a second change value of the distance information is obtained, and a regulation and control data set is generated according to the second change value; and optimizing the regulation and control data set, and controlling the output pressure of the pump body to a target value until the balloon is completely opened. The success rate and safety of balloon dilatation are remarkably improved, and the balloon dilatation process is more controllable and efficient.

Provided are methods and devices for facilitating the advancement of a catheter device, such as an intracardiac ultrasound examination catheter, through a body wall, such as the septum of the heart. The catheter device is advanced through a subject's vasculature to a first body cavity. The catheter device is coupled to a guidewire previously placed within the vasculature between the first and second cavities. The catheter device is then advanced from the first body cavity to the second body cavity through a body wall separating the first and second cavities. To facilitate this advancement, the catheter device can be magnetically coupled to the guidewire. The magnetic assembly can be provided on a distal portion of a sleeve through which the distal portion of the catheter is advanced. A malleable dilator element can also be provided on the distal portion of the sleeve.

A sheath for producing a fully sealed access to the interior of a vessel of an animal or human body comprises a base sheath having a tubular body defining a pass-through channel. The base sheath is adapted to be inserted into the vessel through a vessel aperture. A wall of the tubular body of the base sheath has a through channel. This channel extends in the wall from the distal end towards the proximal end. The channel can be present separately from the pass-through channel of the base sheath or can form a sideways extension of the pass-through channel, at least at the distal end. Such through channel is adapted to conduct blood from the vessel to the proximal end of the sheath when the sheath has been inserted into a vessel.

A catheter having a proximal opening, a distal opening, a lumen extending through the catheter and a side opening forming a rapid exchange port dimensioned and configured for insertion of a guiding device through the side opening. The catheter includes a seal movable between a closed position to reduce leakage through the side opening and an open position, wherein the seal is movable to an open position by the guiding device. The catheter can have one or more independently deflectable zones.