2287results about "Dilators" patented technology

A method and system are disclosed for puncturing tissue, comprising a puncture device for puncturing tissue and a supporting member for supporting the puncture device. The puncture device is capable of being insertable within the supporting member and being selectively usable in co-operation therewith during a portion of a procedure for puncturing tissue and wherein the puncture device is usable independently therefrom during another portion of the procedure.

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.

Embodiments of the present invention 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. 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 to injure or damage tissue, nerves, and nerve endings in order to relieve disease symptoms.

A thrombectomy device including a delivery catheter; a tapered dilator catheter configured to be movably disposed within the delivery catheter; and an expandable aspiration funnel configured to be movably disposed within the delivery catheter in a retracted position and at least partially outside the delivery catheter in an extended position, the funnel comprising a non-permeable covering, a diameter of a distal end of the funnel being greater in the extended position than in the retracted position, the funnel being configured to adapt its shape and length to a surrounding blood vessel such that the funnel lengthens as it narrows to retain a thrombus within the funnel. The invention also includes methods of using the device.

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

Systems and methods can involve wedge dissectors attached to strips in turn attached to medical balloons, for forming serrations within vascular wall tissue for angioplasty as well as drug delivery.

Anatomical wall crossing systems, devices and related methods are disclosed in this patent document. A transseptal system, for example, can include a guidewire, a dilator, and a deflectable sheath configured to safely deliver a puncture needle through a septal wall associated with the fossa ovalis and into a central region of the left atrium of a heart. The dilator can include a dilator nose having a first outer diameter and a dilator beveled segment, extending proximal of the dilator nose, tapering from a second, greater outer diameter to the first outer diameter. The length and interplay of the puncture needle and the dilator nose can be configured such that the puncture needle is inhibited from bending and impinging upon the left side of the atrial septum of the heart during use. A body of the guidewire can include at least one loop segment to provide stable support in the left atrium for delivery of a diagnostic or therapeutic device along its more proximal portions. The deflectable sheath can position and align the dilator nose relative to the fossa ovalis.

To provide a formulation for treating at least one of hypertension, pulmonary hypertension, 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 the 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 and a suspension of one or more ingredients. In embodiments of the present invention, amounts of the formulation and / or energy are effective to injure or damage tissues, nerves and nerve endings in order to relieve disease symptoms.SELECTED DRAWING: None

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 invention relates to the technical field of medical instruments, in particular to a transvascular intervention catheter expansion system which is mainly used for solving the problems of atherosclerotic plaque, thrombus and the like so as to recover unobstructed blood vessels, the system comprises a variable-diameter guide wire, an inner tube and a handle, the diameter of the variable-diameter guide wire can be adjusted according to different blood density types, and the diameter of the inner tube can be adjusted. The buoyancy of the guide wire in the blood is controlled, so that the guide wire is suspended in the blood, and the outer surface of the guide wire is coated with an elastic hydrophilic layer, so that friction with the blood vessel wall can be reduced; an expandable balloon is arranged at the front end of the inner tube, a contact electrode is arranged on the outer side of the balloon, the contact electrode can be attached to a focus area through the volume change of the balloon, and calcified plaques are removed through the heat effect of the contact electrode; an outer pipe is fixed to the handle, an operation channel is formed in the middle of the outer pipe, and a shifting mechanism is arranged on the handle. According to the application, calcified plaques can be efficiently removed, meanwhile, the damage to the inner wall of a blood vessel is reduced, the operation safety is improved, and the risk of complications is reduced.

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.

Various implementations include an inflatable sheath (8) for delivering a medical device, the sheath includes a fluid chamber (for example, a fluid-bearing chamber) (356) that when inflated expands the sheath from an unexpanded configuration in which the central lumen has a first diameter to an expanded configuration in which the central lumen has a second, larger, diameter.

The invention discloses an optical fiber balloon catheter, and relates to the technical field of medical instruments. The optical fiber balloon catheter comprises a catheter main body, a balloon and a flow slowing component, the balloon is arranged at the far end of the catheter body, and medicine is arranged on the surface of the balloon. At least in the process of conveying the balloon to a target part, the flow slowing part is located on the receiving side, receiving fluid impact, of the balloon, and the flow slowing part is used for slowing down flushing of fluid to medicine on the surface of the balloon in the process; wherein when the optical fiber balloon catheter performs reverse motion relative to fluid, the welcoming side is the far-end side of the balloon; when the optical fiber balloon catheter moves in the same direction relative to fluid, the receiving side is the near-end side of the balloon. The structure of the optical fiber balloon catheter is improved, scouring of fluid to the balloon in the conveying process is relieved, and loss of the photosensitizer on the surface of the balloon in the conveying process is effectively reduced.

Methods and apparatuses for insertion and / or pressurization of a balloon catheter for balloon dilation of anatomical passageways in the head of a person such as the Eustachian tube and Sinus passageways. The insertion devices comprise a balloon catheter guiding tube for receiving and guiding the balloon catheter, and a device body rigidly attached to a proximal end of the balloon catheter guiding tube. The pressurization devices comprise a syringe body with a syringe barrel, a proximal thruster guide section, external hand or finger engagement geometries, a plunger with a distal plunger head and a plunger rod, and a thruster having a proximal end with a finger or hand engagement portion.

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.

The invention discloses a balloon catheter for releasing medicine in a human body cavity. The balloon catheter comprises an outer balloon and an inner balloon located in the outer balloon. The diameter of two ends of the outer balloon is larger than that of the middle; a plurality of rows of semi-through holes are formed in the outer balloon, each row of inner semi-through holes are formed in the longitudinal direction of the outer balloon, and a cutting mark is arranged between every two adjacent semi-through holes in each row; and the inner balloon is a three-stage expansion balloon. The double-layer balloon structure is adopted, in the process that the internal pressure of the inner balloon is gradually increased to push the outer balloon to be gradually expanded, two treatment means of medicine spraying and dilation are executed at the same time, and therefore the treatment effectiveness is improved; the use efficiency of the medicine can be ensured while the medicine can accurately act on the focus; compared with an existing treatment means, the application is wider in application range and non-invasive in treatment, foreign matter does not need to be implanted, an instrument does not need to enter a human body cavity for multiple times, and discomfort of a patient during treatment can be greatly reduced.

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.

The utility model discloses a microcatheter assembly with an OCT probe, and relates to the technical field of medical instruments. A microcatheter assembly with an OCT probe, comprising: a microcatheter; the micro-catheter is provided with a first side hole; the first side hole is close to the front end of the micro catheter; a micro guide wire; the micro guide wire is matched with the first side hole; a balloon and an OCT probe; the balloon and the OCT probe are both arranged on the micro catheter. The balloon and the OCT probe are both arranged in the micro catheter, so that the balloon or the OCT probe does not need to be frequently pulled out of or inserted into the cerebral artery during use, and only the balloon or the OCT probe needs to move in the cerebral artery by a small distance (dozens of millimeters or dozens of millimeters). Compared with the prior art, the operation difficulty in use is small, the operation time is short, the risk that the inner wall of the cerebral artery of a patient is damaged can be reduced, and other risks borne by the patient in an operation can also be reduced.

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.

Systems and methods can involve wedge dissectors attached to strips in turn attached to medical balloons, for forming serrations within vascular wall tissue for angioplasty as well as drug delivery.

The utility model belongs to the technical field of prostate expansion, and particularly relates to a urinary surgery clinical prostate expansion device which comprises an outer catheter, a guide rod arranged in the outer catheter, a groove formed in one end of the outer catheter and an expansion assembly movably connected to the guide rod. The dilation assembly comprises a sleeve connected to the outer wall of the guide rod in a sliding mode, an air bag arranged on the periphery of the sleeve in a sleeving mode and used for dilating the prostate, a pull rod arranged at the position, close to the interior of the outer catheter, of the sleeve and an assembly arranged at the end, away from the air bag, of the outer catheter and used for limiting the pull rod. Through the arrangement of the expansion assembly, not only can the prostate be expanded, but also the air bag can be retracted into the outer catheter when the expansion equipment is placed and drawn out, so that the urethra is prevented from being damaged in the process of entering and exiting the urethra, and meanwhile, the air bag can be accurately reset when the air bag is used.

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.

Methods and apparatus for inserting and / or pressurizing a balloon catheter to balloon dilate anatomical channels, such as Eustachian tube and sinus channels, in a human head. The insertion device includes a balloon catheter guide tube for receiving and guiding a balloon catheter, and a device body rigidly attached to a proximal end of the balloon catheter guide tube. A compression device includes a syringe body having a syringe barrel, a proximal pusher guide section, an external hand or finger engagement geometry, a plunger having a distal plunger head and a plunger rod, and a pusher having a proximal end with a finger or hand engagement portion.

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 relates to the technical field of medical materials, and discloses a photosensitive material with a vascular repair function, a preparation method of the photosensitive material and a balloon dilatation catheter. A chemical structural formula of the photosensitive material comprises a first functional group and a second functional group, the first functional group has a function of triggering amino acid in a blood vessel wall to be crosslinked under light excitation, and the second functional group has a function of inhibiting cell proliferation. The photosensitive material provided by the invention has good fat solubility, can accurately anchor a diseased region, exerts a vascular repair function, also can exert an anti-cell proliferation effect together, and further reduces the risk of intravascular restenosis.

The invention provides a balloon catheter suitable for long vasculopathy, and relates to the technical field of medical instruments. The first balloon is arranged at the far end of the catheter body; the diameter of the near end of the first balloon is larger than that of the far end of the first balloon. A through inner cavity is formed in the middle of the catheter body, and a communicating channel communicating the first balloon with the inner cavity is formed in the side wall of the catheter body. By arranging the first balloon and the second balloon, the first balloon extrudes the second balloon after expanding, so that a contrast agent in the second balloon is gradually extruded out, the second balloon deforms, and the deformed second balloon is better attached to the narrow part of a blood vessel and can better adapt to the change of the inner diameter of a channel at a longer blood vessel.

The invention relates to a dilator and a vascular sheath, which can solve the pain points such as blood leakage of a puncture point and occurrence of pseudoaneurysm clinically. The dilator comprises a head, a driving mechanism, a suturing mechanism, an electromagnetic mechanism and a sleeve. The driving mechanism comprises an operating part, a connecting rod and an opening-closing assembly, the near end of the connecting rod is connected with the operating part, the far end of the connecting rod is connected with the opening-closing assembly, and when the operating part moves relative to the head, the opening-closing assembly is unfolded or folded; the suturing mechanism is arranged on the opening and closing assembly and comprises a plurality of needle grooves and suturing needles; the sleeve comprises an outer tube and a catheter, the connecting rod is sleeved with the outer tube, the near end of the outer tube is connected with the head, the catheter penetrates through the connecting rod, and the near end of the catheter is connected with the head; the electromagnetic mechanism is arranged on the head part and comprises an electromagnetic control circuit with a control switch and an electromagnetic chuck, and the electromagnetic control circuit is used for enabling the electromagnetic chuck to generate magnetism; when the opening and closing assembly is in an unfolded state, an opening of the needle groove faces the electromagnetic chuck, and the suture needle is located at the position where the suture needle can be attracted by the electromagnetic chuck.