248 results about "Axial length" patented technology

Polymeric tubing, for use with catheters or other medical devices, where the polymeric tubing can have regions of customized properties including, but not limited to, durometer, torque control, flexibility, axial strength, stiffness, etc. One variation of the device allows for transitions between regions to be configured such that there can be gradual or customized transitions between various regions such that the structural characteristics differential between the regions are selectively designed. Additional variations include outer layers having a plurality of material sections extending in a spiral direction along the axial length to form a continuous wall of the outer layer. In certain variations, the structural characteristic differential is minimized or eliminated as compared to conventional catheters.

Polymeric tubing, for use with catheters or other medical devices, where the polymeric tubing can have regions of customized properties including, but not limited to, durometer, torque control, flexibility, axial strength, stiffness, etc. One variation of the device allows for transitions between regions to be configured such that there can be gradual or customized transitions between various regions such that the structural characteristics differential between the regions are selectively designed. Additional variations include outer layers having a plurality of material sections extending in a spiral direction along the axial length to form a continuous wall of the outer layer. In certain variations, the structural characteristic differential is minimized or eliminated as compared to conventional catheters.

Systems and methods can remove material of interest, including blood clots, from a body region, including but not limited to the circulatory system for the treatment of pulmonary embolism (PE), deep vein thrombosis (DVT), cerebrovascular embolism, and other vascular occlusions. The capture system can include a tubular body comprising a first end, a second end, and an axial length therebetween, the first end having an opening and a capture guide. The capture system can include one or more tensioners coupled to the capture guide. The tubular body has a first configuration in which the first end and the capture guide are expanded while the second end and a majority of the tubular body remains compressed. The tubular body is transformable to a second configuration by application of tension by the tensioners. The catheter can remove a large volume of clot. In some embodiments, the body of the catheter or the funnel tip is expandable. The catheter can include a dilator and a peel-away cover.

Polymeric tubing, for use with catheters or other medical devices, where the polymeric tubing can have regions of customized properties including, but not limited to, durometer, torque control, flexibility, axial strength, stiffness, etc. One variation of the device allows for transitions between regions to be configured such that there can be gradual or customized transitions between various regions such that the structural characteristics differential between the regions selectively designed. Additional variations include outer layers having a plurality of material sections extending in a spiral direction along the axial length to form a continuous wall of the outer layer. In certain variations, the structural characteristic differential is minimized or eliminated as compared to conventional catheters.

The invention provides a degradable combined type tracheal stent and an implantation method, the degradable combined type tracheal stent comprises a plurality of rib plates which are coaxially arranged and are in an annular shape and soft bodies which are connected between every two rib plates and are in a net shape, and axial length adjustability and axial bending deformation of a stent main body are achieved through the soft bodies; the support further comprises a connecting part, the connecting part comprises a first connecting body arranged at the two axial ends of the support body and a second connecting body matched with the first connecting body, and the first connecting body and the second connecting body are matched to achieve axial detachable connection and combination between every two support bodies. The adjustable axial length of the stent main body, bionic axial bending deformation and stable connection and combination between every two stent main bodies are effectively realized. The invention further provides an implantation method of the degradable combined type tracheal stent, the implantation method comprises the steps of obtaining the size of the diseased trachea, determining the diameter and the combination number of the stent body, sleeving the diseased trachea and connecting the combination to complete implantation, and the method is easy to operate and can meet different requirements of clinical complex environments.

The utility model provides a mechanical lock which comprises a lock body, a connecting piece, a lock head and a lock cylinder, the lock head is connected to one end of the connecting piece, the connecting piece is further connected with a fixing piece, the fixing piece is fixed on the lock body, the lock head is provided with a lock groove, a transmission piece matched with the lock cylinder in a transmission mode is arranged in the lock body, and the transmission piece is connected with at least one clamping head in a rotating mode. The clamping head is provided with a clamping part which can be clamped into a lock groove of the lock head, a guide piece is further arranged in the lock body, a guide structure which pushes the clamping head to rotate when the clamping head rotates along with the transmission piece is arranged on the guide piece, and the clamping head is connected with an elastic piece which drives the clamping part of the clamping head to be separated from the lock groove after the lock cylinder is unlocked. The transmission piece is driven to rotate to drive the clamping head to rotate, the guiding piece is matched with the elastic piece to enable the clamping head to rotate along with rotation of the transmission piece, and therefore the clamping portion of the clamping head can be clamped into the lock groove of the lock head, compared with a traditional lock, axial reserved sliding space is not needed, the axial length is shortened, and cost is lower.

Polymeric tubing, for use with catheters or other medical devices, where the polymeric tubing can have regions of customized properties including, but not limited to, durometer, torque control, flexibility, axial strength, stiffness, etc. One variation of the device allows for transitions between regions to be configured such that there can be gradual or customized transitions between various regions such that the structural characteristics differential between the regions are selectively designed. Additional variations include outer layers having a plurality of material sections extending in a spiral direction along the axial length to form a continuous wall of the outer layer. In certain variations, the structural characteristic differential is minimized or eliminated as compared to conventional catheters.

A polymer double-cavity prefilled syringe comprises a barrel with a bypass, the barrel is provided with a finger handle and an adapter, a needle seat is arranged on the adapter, a needle body is fixed on the needle seat, and a protective cap is arranged on the outer side of the needle body. A front plunger, a middle plunger and a rear plunger are arranged in the barrel, and the rear plunger abuts against a plunger rod. The cylinder is formed by integral injection molding of polymer, a group of ribs which are arranged side by side and protrude towards the interior of the cylinder are arranged on the inner wall of the cylinder, the axial length of each rib is larger than that of the middle plunger, the bypass is formed by a gap between every two adjacent ribs, and the outer diameter of the cylinder is larger than that of the adapter; the protective cap is tightly connected with the needle seat, a first anti-falling mechanism is arranged on the joint face of the protective cap and the needle seat, and an inner cavity of the protective cap is communicated with the outside through a bacteria-blocking, hydrophobic and breathable filter membrane. The bypass is formed in the mode that the protruding edges protrude inwards, demolding is convenient, integrated injection molding machining can be conducted through polymers, cost is low, damage is not prone to occurring, and the using effect is good. The outer surface of the cylinder is smooth, the heat conduction performance is good, and the vacuum freeze-drying efficiency is high.

The invention relates to the technical field of supercritical horizontal flow enhanced heat exchange, in particular to a non-equal-interval arrangement type discrete double-inclined inner rib enhanced heat exchange tube which is characterized in that discrete rib structures with bidirectional inclined angles are arranged on the inner wall of a supercritical horizontal heat exchange tube in the circumferential direction at non-equal intervals, and the included angle between the axis of each rib and the axis of the tube is + / -(30-60) degrees; the positive number is inclined in the right-handed rotation direction, the negative number is inclined in the left-handed rotation direction, the normal height of the fins is smaller than or equal to 0.2 d, the circumferential width is smaller than or equal to 0.5 d, the axial length is smaller than or equal to 2d, and d is the hydraulic inner diameter of the base pipe. Multi-scale vortexes are induced through the double inclined fins which are arranged in the circumferential direction of the tube wall at non-equal intervals, mixing of cold and hot fluid can be more effectively promoted compared with DDIR under the supercritical working condition, development of a thermal boundary layer is restrained, adaptability to the thermally induced buoyancy force effect is improved, and therefore higher heat exchange performance is achieved.

The utility model belongs to a spraying device, and provides a supersonic spraying device, a non-invasive spraying device and a spraying instrument.The problems that spraying is not uniform and operation is inconvenient still exist in an existing instrument, and the supersonic spraying device, the non-invasive spraying device and the spraying instrument.The supersonic spraying device comprises a liquid section, a gas inlet section, a contraction section, a throat part and an expansion section, and the gas inlet section, the contraction section, the throat part and the expansion section are coaxially and sequentially connected; liquid enters from the liquid section, gas is accelerated through the contraction section, reaches the throat part and is continuously accelerated at the expansion section, the liquid entering from the liquid section is atomized under the action of the gas at the throat part, is brought into the expansion section and is finally sprayed out from the spraying opening along with continuous acceleration, and the uniform spraying effect is achieved. According to the supersonic jet device, the ratio of the axial length L1 to the axial length L2 is designed, the structure of the supersonic jet device is further optimized, and actual verification shows that under the optimized ratio, the jet force of the supersonic jet device is obviously improved, the particle size and the jet range of jetted liquid drops are better, and the flow speed of the liquid drops is more stable.

The invention belongs to the technical field of medical auxiliary instruments, and discloses a head position supporting and fixing device for the anesthesiology department, which comprises a base plate, the base plate is connected with a head supporting and fixing assembly, the head supporting and fixing assembly comprises a base, a telescopic piece and a headrest plate, the base is connected with a bandage, a lock catch and a connecting seat, and the connecting seat is in sliding connection with the base. The telescopic piece is connected with the base plate. The connecting base is rotationally connected with the telescopic end of the telescopic piece. The headrest plate is connected with the base through a connecting shaft, an inner spline and a blank part are arranged on the inner side of the base, an outer spline is arranged on the outer side of the connecting shaft, and the axial length of the outer spline is smaller than that of the blank part. The head of a patient is fixed through the bandage, and the fixing stability of the head is good; the pitching angle of the head is adjusted by adjusting the height of the telescopic piece, the swinging angle of the head is adjusted by adjusting the meshing condition between the headrest plate and the spline of the base, and the clinical requirement for the head fixing angle can be fully met.

The invention relates to a stent conveying device and a stent system comprising the same. The support conveying device comprises a pushing rod. The force buffering component is arranged at the far end of the pushing rod and comprises at least one force conduction component, a non-zero angle is formed between the force conduction component and the axial center line of the pushing rod, and the distance between the far end of the force conduction component and the whole far end of the stent conveying device is smaller than or equal to the nominal diameter of a stent conveyed by the stent conveying device. When the axial pushing force applied to the near end of the pushing rod enables the near end of the stent conveying device to move in the axial direction by a distance not exceeding half of the axial length of the force conduction component. According to the stent conveying device, the pushing force transmitted to the blood vessel wall can be regulated and controlled, so that the force applied to the blood vessel wall in the pulling and / or pushing process is always in a controllable low force value range, the mechanical stimulation and potential injury risk to the blood vessel wall are reduced, and the stent implantation safety is improved.

The invention provides a cannula capable of effectively and smoothly conveying blood from the ascending aorta while reducing the diameter of the cannula. And the front end part of the cannula is retained in the ascending aorta and is used for smoothly conveying blood supplied by the in-vitro artificial membrane lung from the ascending aorta. The cannula comprises a forward blood backflow part (2) and a blood delivery tube (4), wherein the forward blood backflow part (2) is arranged at the front end of the blood delivery tube (4). A guide wire tube (5) which longitudinally extends from a base end part to a front end part is arranged at a near-center position of the axial length in the smooth blood feeding sleeve (1). The blood delivery tube (4) is a catheter arranged on the base end side and used for being connected with the in-vitro artificial membrane lung. The forward blood return unit (2) reverses blood from a reverse direction to a forward direction and guides the blood to the base end side, and is provided with a first blood return tube (6) provided on the base end side and a second blood return tube (7) provided on the tip side. The second blood return tube (7) has side holes (7a, 7b), and a part of an approximately hemispherical bag body (8) is adhered to the inner portion of the tip of the second blood return tube (7).

The invention discloses a driving module, an operating handle and a surgical instrument.The driving module comprises a columnar base, a rotating assembly, a moving part and a transmission part connecting the rotating assembly and the moving part, and the rotating assembly is connected to the outer wall of the base in a sleeving mode and can rotate relative to the base; the moving part is connected to the inner wall of the base in a sleeving mode and can axially move relative to the base, the driving module further comprises an axial limiting part fixedly connected with one end of the base and an axial limiting part arranged at the other end of the base, and the two axial ends of the rotating assembly abut against the axial limiting part and the axial limiting part in the axial direction respectively; a guide hole with the axial length is formed in the base, and the transmission piece penetrates through the guide hole and is fixedly connected with the moving piece. Under the condition that the rotating assembly rotates, the transmission piece is driven to move within the axial length of the guide hole, and the transmission piece drives the moving piece to move in the axial direction. The invention has the advantages of labor saving, good balance and smooth movement.

The invention provides a conveying device. The conveying device comprises a main stent conveying pipe and a multi-cavity pipe. The main stent conveying pipe is used for conveying an intravascular stent, and a branch opening is formed in the intravascular stent; the multi-cavity tube comprises a plurality of cavities, the cavities have different axial lengths, the preset guide wire is preset in at least one branch opening, and the multi-cavity tube can reach the branch opening along the preset guide wire to establish a passage from the branch opening to the branch blood vessel. According to the conveying device, the intravascular stent can be conveyed only through the lower limb admission passage, the intravascular stent does not need to be conveyed from the upper limb admission passage, and damage to healthy blood vessels is reduced.

A hoop structure includes: a body having a first end and a second end; the connecting rod is connected to the first end and penetrates through the second end; the clamp structure further comprises an adjusting assembly which is arranged on the connecting rod in a sliding mode and located on the side, away from the first end, of the second end, and the axial length of the adjusting assembly can be changed. The disassembling and assembling assembly is located on the side, away from the second end, of the adjusting assembly, the disassembling and assembling assembly is connected with the connecting rod, a limiting section for limiting the axial movement space of the second end and the adjusting assembly is formed by the disassembling and assembling assembly and the first end, and the disassembling and assembling assembly has a first state and a second state; the axial length of the limiting section in the first state is smaller than that of the limiting section in the second state; in the first state, the adjusting assemblies with different axial lengths enable the first end and the second end to have different distances, so that the hoop structure has different locking strengths; in the second state, the main body is in a dismounting state, and the clamp structure has the advantage of being convenient to dismount and mount quickly.

A sleeve (19) arranged to be slidably received within a passage (9) defined in a body of a cable gland (1), the sleeve (19) arranged to receive a settable sealing material for forming a seal to a cable passing through the sleeve, wherein the sleeve (19) comprises: an annular side wall (79) extending along an axial length and having a first end and a second end; and an end wall (100) capping the first end of the annular side wall (79), in which the annular side wall (79) and the end wall (100) define a void (106) within them into which settable sealing material can be received.

The utility model discloses a front end assembly, an insertion part and an ultrasonic endoscope, and relates to the technical field of medical instruments. The front end assembly is used for the ultrasonic endoscope and comprises a front end base and a transducer, the far end of the front end base is of a conical structure, the conical structure is provided with an installation face, the installation face is used for installing the transducer, the height of the conical structure is gradually reduced in the direction from the near end to the far end, and the axial length of the conical structure is larger than the radial height of the conical structure. According to the front end assembly, on the basis of ensuring the load area of the transducer, the difficulty that the insertion part enters the cavity can be reduced, and the convenience that the insertion part enters the cavity is improved.

A needle is provided that can be used for introducing or aspirating fluids to a patient or as an introducer needle for positioning and inserting a catheter, such as a peripheral IV catheter into a patient. The needle can be an introducer needle that extends from the distal end of the catheter during insertion. The needle has an insertion tip with a configuration to assist penetration into a vein with a reduced incidence of injuring the inner surface of the vein or inadvertently passing through side wall of the vein. The needle tip can be farmed with a curved distal end surface where the pointed tip is spaced radially inward relative to the outer surface of the needle. In another embodiment the needle tip can have a reverse beveled surface having an axial length, angle, and curvature to assist in penetrating the vein with a reduced incidence of transfixing the vein.

The application discloses a gas-liquid separator, which comprises a shell extending along an axial length, a first mounting opening is arranged at the top of the shell, a feed pipe is arranged in the shell through the first mounting opening, the feed pipe has opposite top and bottom ends, the top end is an open end for forming an inlet, the bottom end is a closed end, and a first cyclone mechanism is arranged at the bottom end, the first cyclone mechanism is used for providing centrifugal force to the entering fluid, and the first cyclone mechanism comprises a plurality of cyclone arms with a predetermined radian, the cyclone arm is a hollow cavity structure, one end of the cyclone arm is connected with the feed pipe, and the other end is a rotating arm outlet, a liquid discharge opening for guiding the separated liquid is further arranged on the shell, and a gas discharge opening for guiding the separated gas is further arranged on the shell. The application is a gas-liquid separator with simple structure, large processing capacity, high separation efficiency, small pressure drop loss and long-term stable operation, and can adapt to gas-liquid two-phase separation under different working conditions.

Provided is a ventilation member that is suitable for improving the ease of elastic deformation of an insertion part when the insertion part is inserted into an opening of a housing. This ventilation member (10) is provided with a support body (4a) and a ventilation membrane (2). The support body (4a) includes a base portion (11) and a leg portion (12) that support the ventilation membrane (2). The leg part (12) has a plurality of insertion parts (21) and claw parts (23). In a plane (A) orthogonal to the central axis (O) of the support body (4a) and passing through the root portion of the insertion part (21), when an imaginary circle passing through both end portions (21p) in the width direction of the inner surface (21c) of the insertion part (21) and centered on the central axis (O) is defined as a first imaginary circle (C1), the inner surface (21c) of the insertion part (21) has a protruding part (21d) that protrudes further toward the central axis (O) than the first imaginary circle (C1). The ratio of the length in the radial direction of the claw section (23) to the length in the axial direction of the insertion section (21) is from 0.3 to 0.5 (inclusive). In the plane (A), the maximum length of the protruding portion (21d) in the radial direction is 0.1 mm or more and 1.5 mm or less.

The application provides an intraluminal occluder, comprising a framework and a flow-blocking membrane formed on the framework, wherein the maximum axial length of the flow-blocking membrane is greater than or equal to the axial stretching length of the framework. The intraluminal occluder in the application has a small size after compression, can be quickly released, has good wall-adhesion performance after release, and is suitable for occluding an organ channel with a long axial direction.

The invention provides an implant assembly, an interventional medical system and an interventional medical instrument. The implant assembly comprises a slender component, a tissue anchor and a connecting component. The elongate member includes a flexible suture having an axial length; a tissue anchor disposed at the distal end of the elongate member and configured to anchor into tissue; the connecting component is arranged at the near end of the long and thin component, and a first joint part capable of being jointed is arranged on the connecting component. The flexible suture is configured to be located within the body and the connecting member is configured to be always located outside the body during implantation of the tissue anchor within the body. By means of the design of the implant assembly, the interventional medical system and the interventional medical instrument, the possibility that surgical operation is tedious, difficult and prone to failure is greatly reduced, and the treatment effect of the surgery is guaranteed.

The present invention discloses a pump, the pump comprising a pump housing and a heating assembly, the pump housing having a water inlet, a water outlet and a cavity communicating with the water inlet and the water outlet, the pump housing comprising a peripheral wall surrounding the cavity, the heating assembly comprising a heat conducting plate and a heating element, the heat conducting plate being arranged on the peripheral wall of the pump housing, and the heating element being arranged on the outer end surface of the heat conducting plate. The axial length of the pump of the present invention is relatively short.

The present invention provides a suction valve, an endoscope unblocking structure, an endoscope handle and an endoscope, and belongs to the technical field of endoscopes. The suction valve includes a valve body and a valve stem, a valve cavity is arranged in the valve body, the valve cavity includes a sealing cavity and a suction cavity connected to each other, the valve body has a negative pressure channel and an atmospheric channel connected to the valve cavity, the valve stem has a blocking end, and the blocking end is movably arranged in the valve cavity; when the blocking end moves in the sealing cavity, the circumferential side wall of the blocking end contacts and cooperates with the circumferential side wall of the sealing cavity, and the blocking end is in a closed position; when the blocking end moves in the suction cavity, there is a gap between the circumferential side wall of the blocking end and the circumferential side wall of the sealing cavity, and the blocking end is in a suction position. The present application sets a sealing cavity with a certain axial length. When the suction valve is installed in the instrument channel and the instrument channel is sealed, the internal pressure of the instrument channel is adjusted by controlling the position of the blocking end in the sealing cavity, so as to push the stones blocking the instrument channel to move and open the instrument channel.

An implant that is implantable between vertebrae includes a monolithic body with a first end and a second end opposite the first end, an outer surface extending axially from the first end to the second end, a plurality of teeth at the first end, each of the teeth extending axially away from the second end to a free end, and an abutment surface facing away from the second end that is positioned radially inwardly relative to at least one of the teeth. The abutment surface is recessed axially relative to the free ends of the teeth to an extent such that the abutment surface is configured to contact a vertebra when the implant is implanted. The monolithic body is configured to extend axially over a majority of an entire axial length of the implant.

The utility model belongs to the field of medical equipment, and particularly relates to an implant conveying system as well as an inner tube assembly and a conveying component thereof. The inner tube assembly includes: an inner tube; the inner sleeve is arranged outside the inner pipe in a sliding and sleeving manner; the tube sleeve is connected to the outer part of the near end of the inner sleeve; the inner tube protection structure is fixedly arranged outside the near end of the inner tube in a sleeving mode, and the inner tube protection structure is located between the tube sleeve and the inner tube so that an anti-bending tube layer with the preset axial length can be formed at the near end of the inner tube. According to the utility model, the inner tube protection structure is arranged outside the near end of the inner tube, so that supporting force can be provided for the near end of the inner tube, and the inner tube is prevented from being bent in the implant conveying process, particularly in the inner tube withdrawing process.

An implant includes: an inner rod having an outer surface; an outer rod in telescopic engagement with the inner rod, the outer rod having a threaded inner surface in axial slidable engagement with the outer surface of the inner rod; the inner rod and the outer rod each having an end configured for attachment to bone; a rotational actuator housed within the inner rod; and a lead screw in axial alignment with the rotational actuator and rotationally coupled thereto, the lead screw in threaded engagement with the threaded inner surface of the outer rod, whereby rotational motion of the actuator is converted into linear motion, resulting in telescopic changes in the overall axial length of the device.

The invention relates to a part measuring device and a part inner and outer diameter measuring method. The part positioning device comprises a driving assembly and two tips, at least one tip can move in the axial direction, and the driving assembly drives one tip to rotate; the outer diameter measuring instrument, the light output end and the light receiving end are distributed on the two sides of the center in the radial direction, and the outer diameter measuring instrument can move in the axial direction of the center; the driving assembly drives the measured part to rotate, and the outer diameter measuring instrument moves in the axial direction of the center to measure the outer diameter, the outer diameter run-out and the length of the to-be-measured section of the measured part. The two tips are arranged to position and fix the measured part and drive the measured part to rotate, the to-be-measured section of the measured part sequentially penetrates through the light curtain of the outer diameter measuring instrument through movement of the outer diameter measuring instrument, and the purpose of measuring the outer diameter, the outer diameter run-out and the axial length of the to-be-measured section of the measured part is achieved through the outer diameter measuring instrument.

Disclosed are a stent delivery and release device and a stent delivery and release system. The stent delivery and release device (20) includes a stent proximal end release assembly provided at a proximal end of the stent delivery and release device, a guide head provided at a distal end of the stent delivery and release device, and a control member, wherein an external stent is configured to be loaded between the guide head and the stent proximal end release assembly; a proximal end of the control member is connected to the stent proximal end release assembly, and at least part of a distal end of the control member is wound around the stent and is detachably connected to the guide head; and the stent proximal end release assembly folds or releases the stent by controlling the axial length of the control member.