119 results about "Axial length" patented technology

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 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 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).

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.

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 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 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 deep groove ball bearing with the sealing device comprises an inner ring, an outer ring and a rolling body arranged between the inner ring and the outer ring, the rolling body is arranged on the left, the inner ring and the outer ring are divided into a left space and a right space which are asymmetric in axial length, the axial length of the right space is larger than that of the left space, and the axial length of the left space is larger than that of the right space. And the sealing device is embedded in the right space, so that a lubricant leakage prevention blocking structure is formed on the left side of the sealing device, and an antifouling blocking structure is formed on the right side of the sealing device. The bearing pedestal at least has the following advantages that the axial length of the bearing pedestal can be greatly shortened, and compactness, light weight and energy conservation of the gearbox structure are facilitated.

The invention relates to the technical field of articles for daily use, in particular to a cover body and a container with the cover body, the cover body comprises a body and a cock part, the cock part is arranged in the body and forms threaded connection with the body, the cock part is selectively located at a first position or a second position of the body, and the cock part comprises a cock part provided with a first threaded protrusion; the first threaded protrusion is provided with a first clamping structure protruding and extending in the radial direction of the cock part, the body is provided with a second threaded protrusion and a second clamping structure, the second threaded protrusion and the second clamping structure extend in the radial direction of the body, and the second clamping structure is located in the cover closing direction of the second threaded protrusion. And the first clamping structure and the second clamping structure form clamping fit. According to the cover body, the first clamping structure is arranged on the first threaded protrusion, the axial length of the cock piece can be shortened, and therefore the overall height of the cover body is reduced, the height of the container with the cover body is reduced, and the container is more reasonable in structure and more portable.

The invention discloses an arch-shaped switching structure and a gas compressor which are used for being connected with an inner casing and an outer casing correspondingly. Comprising a first axial part, a first radial part, a second axial part and a second radial part, wherein the first axial part is formed by extending in the first direction in the axial direction; the first radial part is formed by extending the first end of the first axial part outwards in the radial direction; the second axial part is formed by extending the outer end of the first radial part towards the second direction in the axial direction; the first radial part is used for being connected with the inner casing in the axial direction through a fastener and abutting against the outer side wall of the inner casing in the radial direction, and the second radial part is used for being connected with the outer side wall of the inner casing in the radial direction. The third axial part is used for being in radial abutting connection with the inner wall face of the outer casing, the third radial part is used for being connected with the outer casing through a fastener in the axial direction, the first direction is opposite to the second direction, and the axial length of the first axial part is larger than the axial length of the second axial part and the axial length of the third axial part.

The invention relates to the technical field of refraction correction, in particular to a myopia control lens design method based on a heterogeneous scattering unit array, which comprises the following steps of: acquiring an eye axis length, a corneal curvature and a pupil diameter, calculating an incidence characteristic and a visual axis reference value, dividing functional areas according to an arrangement relationship between the incidence characteristic and a micro lens, and calculating a myopia control lens array; the method comprises the steps of building a coordinate index, analyzing structure parameter differences, reading parameters, calculating regulation and control characteristic values, and mapping array coordinates to generate a manufacturing instruction sequence. According to the structure arrangement and main visual axis relation, dividing functional sections, improving the matching degree of the area visual function, introducing a structure difference recognition and fine adjustment mechanism, improving the structure adjustment precision, and improving the manufacturing accuracy. The optical path control capability is enhanced, parameters are mapped into manufacturing instructions, the structure execution accuracy is ensured, the processing consistency is improved, closed-loop optimization from parameter acquisition, structure regulation and control to manufacturing instruction generation is integrally realized, the coupling of a visual intervention structure and functions is enhanced, and the stability and continuity of a correction effect are improved.

The invention relates to the technical field of biological experiment equipment, and discloses a microsyringe with an adjustable telescopic needle head length, which comprises a needle cylinder, the liquid tube is fixed in the needle cylinder, a pressing push rod is installed in the liquid storage tube in a sealed and sliding mode, a needle head is arranged at the other end of the liquid storage tube, and one end of the needle head extends out of the needle cylinder; the limiting sleeve is arranged at one end of the needle cylinder in a sleeving mode, a through hole matched with the needle head is formed in one end of the limiting sleeve, the length of the needle head can be adjusted, injection depths of different animal eyeballs can be accurately matched, and liquid medicine overflow or tissue damage is avoided. A unique single-hand operation mechanism is adopted, the problem that traditional two-hand cooperation is not stable is solved, the device is particularly suitable for a fine experiment scene where animal eyes need to be fixed by hands and another handheld microsyringe needs to be used at the same time, in addition, a multi-tube parallel layout is designed, the axial length is shortened, the structure is compact, holding is stable, and the injection flexibility and reliability are remarkably improved.

The invention provides a stent for coronary artery opening lesion treatment, which belongs to the technical field of medical instruments and comprises a tubular stent main body and an anchoring structure, the anchoring structure is arranged at one end of the tubular stent body and comprises a plurality of petal-shaped unfolding units evenly distributed in the circumferential direction. The petal-shaped unfolding units are attached to the outer wall face of the tubular stent body in the compressed conveying state and automatically turn and unfold outwards in the in-vivo releasing state, and an anchoring face is formed, and the included angle between the anchoring face and the axis of the tubular stent body ranges from 80 degrees to 100 degrees. The end, close to the anchoring structure, of the tubular stent body is further provided with an axial moldable transition section, and the axial length of the moldable transition section ranges from 1.5 mm to 3 mm. The invention provides a coronary artery opening stent with a petal-shaped anchoring structure and an axial moldable transition section. The coronary artery opening stent aims at fundamentally solving the problems of precise positioning and reliable fitting of opening lesion stent implantation.

Medical instrument for taking a tissue sample in the body, the instrument includes an inner tube and an outer tube mounted axially slideable over the inner tube. The inner tube possesses a distal end with a cutting spiral and a proximal end to turn the spiral in the tissue to be sampled. The outer tube possesses a distal end with a cutting edge to cut loose the tissue in the spiral by sliding the outer tube over the spiral. Both tubes over at least an overlapping axial length of 30 cm are executed flexibly bendable because over said length the tubes are provided with one or more grooves which extend through the wall of the tubes and which open upon torsion in one direction.

Disclosed herein is a device for use in a spine surgery. The device includes: a first member having a distal end and a proximal end and includes a first lumen extending through the axial length of the first member and has a proximal opining for introducing a first fluid therethrough; a second member having a distal end and a proximal end and includes a second lumen sized to accommodate the first member therein except the distal and proximal ends thereof, a third lumen having a distal opening and is parallel to the second lumen, and a proximal inlet connected to the third lumen for introducing a second fluid therethrough; and an expandable structure coupled to the distal opening of the third lumen, wherein the first member is made of a rigid material, while the second member is made of a flexible material; and the second fluid is to expand the expandable structure. Also disclosed herein is a method for treating a spine disease by use of the device disclosed herein.

To provide a balloon catheter capable of achieving both of improvement in pull-in property to a guiding catheter and excellent expansion accuracy when the diameter of a balloon is expanded.SOLUTION: A balloon 140 includes a straight portion 141 and a tapered portion 142 inclined from the straight portion 141 toward a connecting portion with a shaft 110, having the same diameters along the axial direction. An outer diameter of the straight portion 141 at the time of NP dilation is greater than 4 mm and equal to or less than 6 mm. A taper length D1 which is an axial length of the tapered portion 142 is 4-6 mm. A ratio of the taper length D1 to a distance D2 (farthest end portion distance D2) from a central axis C of the shaft 110 to a farthest end portion of the balloon 140 when the balloon 140 deflated in a state where a plurality of blade portions 150 are formed in the straight portion 141 and the tapered portion 142 in the circumferential direction is viewed in the axial direction is 2-4.SELECTED DRAWING: Figure 5

The invention discloses a tool positioning plate which is used for arranging an inserting piece, the inserting piece is provided with a penetrating column and a convex part, the convex part is connected with one side of the penetrating column, the tool positioning plate comprises a main body of a plate-shaped structure, the main body is provided with a top edge side and a bottom edge side, the length between the top edge side and the bottom edge side is defined as a first length, and the length between the top edge side and the bottom edge side is defined as a second length. The axial length of the penetrating column is defined as a second length, the first length is at least equal to the second length, the main body penetrates through a plurality of setting holes, a plurality of hole walls are formed on the main body, at least every three hole walls are sequentially adjacent to each other, a setting hole is formed among the hole walls, a plurality of stop surfaces are formed on the main body, and the stop surfaces respectively stop the convex parts entering the setting holes; therefore, the insertion piece is limited.

The invention discloses a mechanism improvement of a fluid rectifier for a pump pipeline, the mechanism improvement is applied to low-impurity fluid transportation, and the fluid rectifier is of a cylindrical structure, comprises a diverging pipe, a plurality of rectification modules, a plurality of flow mixing cylinders and the like, and is used for performing rectification functions such as cutting, limiting and guiding on pipeline fluid. The rectification module is provided with a plurality of rectification plates, and the number is N; the rectifying plate is in a streamline thin shape, the appearance of the rectifying plate is a trapezoidal plate, the rectifying plate comprises a bottom, a top, a front edge, a rear edge and the like, the inner wall of a cylinder of the rectifying module has an axial length, the bottom of the rectifying plate is axially mounted on the inner wall of the cylinder and extends inwards to form a longer edge at the bottom, the top has a shorter edge, and the height from the bottom to the top is larger than the height of the rectifying plate. The rectifier module is ensured to be an open flow field; the front edge and the rear edge respectively form oblique angles with the radial section; the bevel edge of the front edge of the rectifying plate can prevent long-strip-shaped sundries from being blocked on the rectifying plate.

The utility model provides a wearable device hinge which comprises a fixing frame and a rotating structure, and the rotating structure comprises a connecting frame, a first connecting rod, a connecting shaft and a torsion rebounding mechanism. The torsion springback mechanism comprises a fixing shaft and a torsion connecting rod, the first end of the torsion connecting rod is connected with the fixing shaft, the second end is connected with the connecting shaft, the first end of the first connecting rod is fixedly connected with the connecting frame, and the second end is connected with the connecting shaft; the fixing frame is further provided with a supporting part for the first connecting rod, so that after the first connecting rod rotates around the connecting shaft from the first angle to the second angle, the first connecting rod is matched with the supporting part to form a rod piece rotating around a new circle center in the rotating interval from the second angle to the third angle. According to the utility model, a better clamping force value is realized, the wearing experience feeling is improved, and the pair of glasses can be successfully applied to occasions such as AR (Augmented Reality) glasses which need to be continuously opened after a basic angle and can be rebounded, and the requirement on the axial length is higher.

The invention provides a delivery system of a medical device. The delivery system comprises a first delivery device and a second delivery device. The first delivery device includes a first handle and a first catheter including a bendable distal section. The second delivery device includes a second handle and a second conduit extending coaxially through the first delivery device. The second catheter has a first section along an axial length thereof and a second section having a reduced outer diameter, the second section being located at a distal end of the first section. The first handle is operated to force the distal section of the first catheter to bend, and the second section of the second catheter can be shaped into a bent form by the bent distal section and can at least partially restore to the initial form from the bent form after extending out of the bent distal section. The delivery system can reasonably and effectively deliver the medical device to a target area in the body of a patient, and the success rate of an operation is improved.

The invention belongs to the technical field of medical instruments, and discloses an axial shrinkage prevention device for a balloon catheter. The device comprises a first assembly. The first assembly is arranged on the balloon and extends in the axial direction of the balloon, the two ends of the first assembly are connected with the opposite inner walls of the balloon in the axial direction respectively, the first assembly comprises an energy storage part capable of storing and releasing energy, and when the balloon is in a full state, the inner walls of the two sides of the balloon move oppositely to drive the first assembly to be compressed in the axial direction, and the energy storage part stores energy; when the balloon is switched from the full state to the pressure relief state, the energy storage part releases energy, the first assembly is driven to axially extend, and the balloon is subjected to axial tension, so that the axial length of the balloon in the pressure relief state is larger than that of the balloon in the full state. By means of the pressure relief balloon, the problems that due to the fact that the outer diameter of the balloon is too large after pressure relief, damage to tissue is aggravated in the withdrawing process, the difficulty of withdrawing a sheathing canal is increased, or a sheathing canal of a larger specification needs to be adopted are solved, and therefore the possibility of damage to the tissue in an operation and postoperative complications is reduced.

The invention discloses a linear actuator for driving a tendon rope and a dexterous manipulator. The linear actuator comprises a guide support, a lead screw, a rotating source, a nut and the tendon rope, and the lead screw is rotationally connected to the guide support; one end of the screw rod is fixedly connected to the output end of the rotating source; the rotating source is used for driving the screw rod to rotate; the nut is slidably connected to the guide support in the axial direction of the lead screw and is in threaded fit with the lead screw. One end of the tendon rope is fixed to the nut. According to the linear actuator, an extension rod is omitted, the tendon rope is directly fixed to the nut, the maximum axial length of the linear actuator is effectively reduced, and integrated design is better facilitated.

Devices, systems, and techniques for delivering electrical stimulation therapy and / or sensing physiological signals from a variety of different locations on one or more medical leads are disclosed. For example, a medical lead may include a cylindrical lead body defining a longitudinal axis, a proximal portion, and a distal portion, and a first electrode having a first length parallel to the longitudinal axis, the first electrode disposed at a first circumferential location around the cylindrical lead body. The medical lead may include a plurality of second electrodes, each electrode of the plurality of second electrodes having one or more second lengths parallel to the longitudinal axis and different from the first length, and wherein the plurality of second electrodes are disposed at a second circumferential position of the cylindrical lead body different from the first circumferential position. Each of the plurality of second electrodes may be disposed at a different longitudinal position.

An ophthalmic device, its control method, and storage medium are disclosed. Highly reliable axial length measurement can be performed independently of the movement of the examined eye. An exemplary embodiment of the ophthalmic device performs a first optical coherence tomography (OCT) scan of a first region containing a first part of the examined eye and a second OCT scan of a second region containing a second part. The ophthalmic device aligns itself by acquiring first offset information of the examined eye before the first OCT scan and by acquiring second offset information before the second OCT scan. The ophthalmic device calculates the distance between the first and second parts of the examined eye based on the first data acquired through the first OCT scan and the second data acquired through the second OCT scan.