211 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.

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.

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.

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.

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 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.

The invention relates to the technical field of medical instruments, and discloses a medical part, a pushing part and a guiding device.The medical part comprises a guiding pipe body, a plurality of through holes are formed in the side wall of the guiding pipe body, and the guiding pipe body has an extending configuration in an extending state and an expanding configuration in an expanding state; the axial length of the extension configuration is larger than that of the expansion configuration, and the outer diameter of the extension configuration is smaller than that of the expansion configuration; the supporting tube body is coaxially connected with the near end of the guiding tube body; the axial length of the guiding pipe body is larger than that of the supporting pipe body. The length of the guide tube body is increased, the coverage range of the through holes formed in the guide tube body is larger, the long-section blood drainage requirement can be met in a targeted mode, and the clinical applicability is improved.

The application discloses an optical system and a method thereof for measuring an axial length, which comprises an OCT light source module, an OCT imaging module, an eye posterior segment OCT sample arm module and an anterior segment slit imaging assembly. The OCT light source module provides measuring light, which is incident on the fundus of an eye to be measured after passing through the eye posterior segment OCT sample arm module, and the OCT imaging module receives the measuring light to obtain an eye posterior segment OCT image. The anterior segment slit imaging assembly comprises an anterior segment slit light source module, an anterior segment slit imaging module and an anterior segment slit imaging adjustment light path module. The anterior segment slit light source module provides slit light, which is focused on the anterior segment of the eye to be measured after passing through the anterior segment slit imaging adjustment light path module, and the anterior segment slit imaging module receives the slit light to obtain an anterior segment slit image. The first optical path data and the second optical path data are obtained by using the eye posterior segment OCT image and the anterior segment slit image respectively, so that the axial length is calculated. The application avoids the influence of the movement of the eye to be measured, and improves the axial length measurement precision.

The utility model discloses an eye mold box stirring mechanism which comprises an eye mold box body and a stirring mechanism body located in the eye mold box body, the stirring mechanism body comprises a stirring roller and a stirring barrel located on the stirring roller, the stirring barrel is detachably connected with the stirring roller, the stirring barrel is arranged on the outer side of the stirring roller in a sleeved mode, and the stirring roller is connected with the stirring barrel. The axis length of the stirring barrel is larger than that of the stirring roller, the stirring barrel comprises a first stirring section and a second stirring section, spiral first stirring blades are arranged on the outer side face of the first stirring section and extend to the two ends of the first stirring section along the axis of the stirring barrel, the second stirring section comprises a plurality of second stirring blades, and the second stirring blades extend to the two ends of the first stirring section along the axis of the stirring barrel. A gap exists between every two adjacent second stirring blades, the length of the axis of the second stirring section is larger than that of the stirring roller, the stirring roller is connected with a driving motor, wire drawing powder can be prevented from being accumulated at one end of the eye mold box body through the stirring barrel, the wire drawing powder at one end of the eye mold box body can be automatically stirred to the stirring roller, and efficiency is improved.

The present invention provides a stent delivery and release device for releasing a stent into a blood vessel, comprising: a guide head, a sheath core assembly, a sheath tube assembly, a control member, and a stent proximal release assembly, wherein the guide head is arranged at the distal end of the sheath core assembly, the stent proximal release assembly is arranged at the proximal end of the sheath core assembly, the sheath tube assembly is sleeved on the sheath core assembly, the control member is detachably connected to the guide head, and the stent proximal release assembly repeatedly tightens or releases the proximal end of the stent by controlling the axial length of the control member. The present invention solves the technical problem that the proximal or distal end of the stent is released before the release condition is met, resulting in inaccurate stent release position and ultimately stent release failure.

The present invention is applicable to the field of medical devices, and provides a luminal stent, comprising a main stent and at least two legs connected to one axial end of the main stent, the main stent comprising at least one spacing adjustment portion, the spacing adjustment portion being located on the proximal side of the legs, and the spacing adjustment portion being used to adjust the relative spacing between the two axial ends of the main stent. The luminal stent provided by the present invention includes a spacing adjustment portion on the main stent, and the spacing adjustment portion is used to adjust the distance between the two axial ends of the main stent, so that the axial length of the main stent can be changed after the spacing adjustment portion is deformed, so that the end position of the main stent connected to the legs can be extended and abut against the intersection of the main blood vessel and the branch blood vessel, so that the luminal stent can obtain a stable support of the human body's own vascular structure, so that the luminal stent will not be easily displaced even when it is flushed by blood flow.

The utility model relates to the technical field of medical detection instruments, and discloses a tear collecting device, which comprises an adsorption main body with a built-in accommodating cavity, one end of the adsorption main body is provided with an opening communicated with the accommodating cavity, and the other end of the adsorption main body is communicated with an adsorption needle tube; the force application body is arranged in the containing cavity in a penetrating mode and abuts against the inner wall of the containing cavity in a sealed mode, and the force application piece is suitable for moving in the length direction of a barrel body of the adsorption body under the action of external force, adjusting the internal pressure of the containing cavity and sucking or discharging external liquid; and the buffer part is arranged in an elastic and water-permeable manner, is correspondingly arranged at a tube opening, back on to the adsorption main body, of the adsorption needle tube, is in limiting connection with the tube opening, and at least partially protrudes out of the tube opening. Therefore, the tube orifice is prevented from being in direct contact with a sampling part, the risk that the sampling part is damaged by structures such as the tube orifice is reduced, and meanwhile, the buffer part is made of a water-permeable material, so that when a user applies force to the force applying main body and generates negative pressure in the accommodating cavity to adsorb external liquid such as tears, the liquid can enter the adsorption needle tube and even the accommodating cavity and is discharged in the same way.

The present disclosure relates to means of treating ocular axis length diseases, such as myopia. The optical films of the present invention include apparatuses and methods for formulating, selecting, supplying and assembling permanent or non-permanent optical films for use with standard monochromatic eyeglasses, where the apparatuses and methods are configured with non-refractive opaque features, wherein the non-refractive opaque feature promotes an increase in the whole retinal ganglion cell activity of the wearer, which can be used as an optical signal to slow, improve, control, inhibit or reduce the speed of myopia progression in the wearer.

The present invention provides a coated stent and a delivery system, comprising a main stent with a tubular body, wherein the main stent comprises a proximal segment and a distal segment in sequence along the axial direction, the distal segment comprises a first branch and a second branch, the lumen of the first branch and the lumen of the second branch are both connected to the lumen of the proximal segment, and a double-branch implantation method of implanting a small stent is adopted, so that the types of blood vessels that the coated stent can adapt to are increased, and the adaptability is strong. Furthermore, the first branch and the second branch are spirally wound around each other and then fixedly arranged; so that the coated stent can increase the anchoring length of the implanted small stent under the same axial length, thereby increasing the stability after connection.

An “extension ready” spinal support system that enables the extension to be accomplished with minimal disturbance to an existing spinal support structure to which the extension system is coupled. In some embodiments, the existing spinal support rod and pedicle screws can remain intact while extension subassemblies are mounted directly to the existing base rod receptacles. The extension subassemblies include a skirt portion that surrounds and engages the existing base receptacle to prevent splaying of the base receptacle. Additional resistance to splaying may be provided by a canted thread arrangement between the skirt and the base receptacle. In some embodiments, the extension receptacle is provided with a low profile (i.e., shortened axial length from the base rod receptacle) by providing a monoaxial rotation structure that rotates about but does not pitch relative to the extension axis and is shorter relative to polyaxial rotation structures.