48 results about "Stone removal" patented technology

The invention discloses a magnetic control steerable guide wire and an ERCP biliary tract probing and calculus removing operation method thereof.The magnetic control steerable guide wire comprises a magnetic control guide wire body and an external electromagnetic coil, the magnetic control guide wire body comprises a head end magnetic control module, a flexible transition section, a guide wire body section and a near-end control handle, the tail end of the head end magnetic control module is connected with the flexible transition section, and the tail end of the guide wire body section is connected with the external electromagnetic coil; the tail end of the flexible transition section is connected with a guide wire main body section, the tail end of the guide wire main body section is connected with a near-end control handle, and the external electromagnetic coil comprises an annular coil and an insulating layer.By means of guide wire head end magnetic force control and external magnetic field guiding, the problem that guide wire intubation is difficult due to the fact that a gallbladder duct and a total hepatic duct form an angle is solved; and through magnetic control of the head end of the guide wire and guidance of an external magnetic field, the problem that the guide wire is difficult to intubate due to angulation of the gallbladder duct and the total hepatic duct is solved, and the success rate and the safety of taking out the biliary calculus are improved.

The invention provides a guide wire calculus removing mesh basket and application thereof. The guide wire calculus removing net basket comprises a net basket body, a guide wire, a net basket cap, an outer sheath tube and a handle, the tail end of the guide wire is connected with the head end of the net basket cap, the net basket cap is arranged outside the head end of the outer sheath tube, the net basket body is inserted into the outer sheath tube through the tail end of the outer sheath tube, one end of the net basket body is connected with the tail end of the net basket cap, and the other end of the net basket body is connected with the handle. The handle is located outside the tail end of the outer sheath tube. The device can be inserted through various instrument channels such as a nipple incision knife, SpyGlass or a pancreatic and biliary duct imaging system forceps channel, and multi-scene calculus removal treatment is achieved; in the process of releasing the mesh basket, the head end of the soft guide wire crosses the calculus and enters the bile duct at the far end more easily, release of the mesh basket is facilitated, and the calculus can be extracted by pulling back the mesh basket.

The present application relates to the technical field of medical devices, and in particular to a negative‑pressure suction sheath. The negative-pressure suction sheath comprises a sheath tube and a directional expansion structure; the sheath tube is arranged at the distal end of the negative‑pressure suction sheath; the distal end of the sheath tube comprises a passive bending section capable of bending along with an active bending section of an endoscope; the side wall of the passive bending section is provided with a through opening; the through opening extends in the extension direction of the passive bending section; the directional expansion structure is connected to the sheath tube and seals the through opening; when the passive bending section bends and compresses the portion of the directional expansion structure sealing the through opening, the compressed portion of the directional expansion structure bulges toward the outside of the through opening. The present application can solve the problem that, when an insertion portion is used to drive the distal end of the sheath tube to bend so as to suction stones at a lateral side, unsmooth stone removal easily occurs.

The invention discloses a negative pressure suction sheath capable of monitoring high pressure in a renal pelvis, and relates to the technical field of medical instruments, the negative pressure suction sheath comprises a sheath tube body, the end part of the sheath tube body is communicated with a sheath tube joint, and the sheath tube joint comprises a negative pressure joint, an instrument channel, a pressure release valve and a pressure measuring interface; the sheath tube body comprises a pressure measuring channel, a pressure measuring hole and a negative pressure suction channel. Through an independent pressure measuring channel composed of the pressure measuring connector, the pressure measuring channel and the pressure measuring hole, the pressure measuring connector, the pressure measuring channel and the pressure measuring hole are matched with a pressure release valve overflow monitoring mode or an external pressure sensor mode, the pressure change in the renal pelvis is captured in real time, when the pressure is close to or reaches a safety threshold value, medical staff can adjust the perfusion flow and the negative pressure parameter in time, and the operation is convenient. Medical accidents such as renal pelvis tissue swelling and necrosis caused by too high pressure are effectively avoided, so that the pressure in the renal pelvis is maintained within a safe range, the safety of an operation is greatly improved, the stone removing efficiency is improved, and the operation time is shortened.

The invention relates to the technical field of medical instruments, and discloses a common bile duct calculus removing device which comprises a connecting base, a flexible calculus removing catheter and a compliance response balloon which are sequentially connected from right to left, and a microfluid displacement sensing unit and a calculus removing propelling unit are arranged on the outer side of the end, close to the connecting base, of the flexible calculus removing catheter. A plurality of pressure micro-fluctuation acquisition units are distributed on the upper surface of the cavity wall of the compliance response balloon; the flexible calculus removal catheter and the compliance response balloon are fixedly mounted, and a microfluid deformation cavity communicated with the interior of the flexible calculus removal catheter is formed in the compliance response balloon; the microfluid displacement sensing unit is communicated with the microfluid deformation cavity through a microfluid connecting pipe, and the calculus removing propelling unit, the pressure micro-fluctuation collecting unit and the microfluid displacement sensing unit are all electrically connected with a controller. The precision degree in the whole stone removing process is improved.

The present invention discloses a vibrating lithotripsy device for a gastric stone crusher, specifically relating to the technical field of stone removal, comprising a protective tube, a stone crushing assembly being provided on the protective tube, and the stone crushing assembly comprising a tray provided in the protective tube. The present invention uses the corresponding coordinated use of various structures, so that one end of each reinforced electroplated stone removal clamp rod is gathered together. When the reinforced electroplated stone removal clamp rods are gathered together, a function of wrapping the stone is formed. The amplitude generated by the micro-vibration motor is transmitted to the contact plate, and is transmitted through the conduction disk and the amplitude conduction rod body. When the amplitude is transmitted to the connecting disk, it is transmitted to the reinforced electroplated stone removal clamp rod via the shaft pin rod, and the nylon stone removal clamp head can abut against the stone, while the anti-slip strip increases the friction between the stone and the nylon stone removal clamp head, making it convenient for the stone to be clamped by the reinforced electroplated stone removal clamp rod and the nylon stone removal clamp head after falling off, making it easy for the stone to be removed, making stone removal more convenient.

The invention discloses a disposable ureter lithotripsy and calculus discharging device, and belongs to the technical field of urinary surgery minimally invasive surgical instruments, and the disposable ureter lithotripsy and calculus discharging device comprises a disposable ureteroscope, comprising a head end seat, a camera module assembled on the head end seat, a temperature and pressure sensor assembled on the head end seat, a snake bone connected with the head end seat, and a hose connected with the snake bone, the head end seat is provided with at least two channels; wherein one channel is configured as a water injection channel, and the other channel is configured as a suction intervention channel; the handle assembly is connected with the insertion assembly; according to the disposable ureteral lithotripsy and lithotripsy device, a traditional lithotripsy and lithotripsy operation mode is changed, and the problems that a traditional ureteral lithotripsy and lithotripsy system is complex in operation and large in material consumption, real-time temperature and pressure monitoring cannot be conducted, and the temperature and pressure in the body cannot be adjusted are solved.

Medical devices for use during a stone removal intervention as well as methods for treating a stone along a urinary tract are disclosed. An example medical device may include an elongate shaft having an injection lumen formed therein. The elongate shaft may be configured to navigate through a body lumen or a body tissue to a position adjacent to a stone disposed along a urinary tract and / or adjacent to a kidney. The capturing substance may be disposed within the injection lumen and may be configured to be injected into the urinary tract adjacent to the stone.

The utility model relates to the technical field of urethral calculus removing, in particular to a urethral calculus removing device which comprises a catheter, a guide wire, a mounting block and two clamping arc plates. The guide wire positioning device has the advantages that opening and closing of the sliding grooves can be controlled by pushing and pulling the sliding plate through the top plate, then the positioning teeth can flexibly slide in the fixing plate through the sliding grooves, when the sliding plate slides along the sliding grooves and is tightly attached to the guide wire, the sliding plate can be clamped between the two positioning teeth to fix the guide wire, and then positioning of the guide wire is achieved; according to the calculus removing device, the position of the clamping arc plate can be fixed to clamp the calculus, the situation that the guide wire slides back and forth after the calculus is clamped by the clamping arc plate is avoided, then the calculus is more stably clamped by the clamping arc plate, calculus removing is more accurate and rapid, and pain of a patient in the calculus removing operation process can be greatly relieved.

This invention discloses a disposable ureteral lithotripsy and stone removal device, belonging to the field of minimally invasive surgical instruments in urology. It includes: a disposable ureteroscope, comprising: an insertion assembly including: a tip, a camera module mounted on the tip, a temperature and pressure sensor mounted on the tip, a snake-like bone connected to the tip, and a flexible tube connected to the snake-like bone; the tip has at least two channels, one configured as a water injection channel and the other as a suction intervention channel; a handle assembly connected to the insertion assembly; and a disposable ureteral lithotripsy and stone removal system connected to the handle assembly. This disposable ureteral lithotripsy and stone removal device changes the traditional surgical method of lithotripsy and stone removal, solving problems such as the complexity of operation, high consumable costs, inability to perform real-time temperature and pressure monitoring, and inability to regulate internal temperature and pressure in traditional ureteroscopic lithotripsy and stone removal systems.

The present technology includes stone removal devices for capturing, fragmenting, dusting, and / or removing pathological objects such as urinary stones from within a patient. The removal devices may include an expandable distal complex that can capture and isolate some or all of a target stone. The distal complex may further include a combination of energy sources, including laser energy, ultrasonic energy, mechanical energy, hydraulic energy (e.g., high pressure water jets), and / or other energy sources and features for fragmenting or dusting the captured target stone. The fragmented or dusted target stone can then be removed via an aspiration lumen extending through an elongated shaft of the removal device.

The utility model discloses a coaxial mesh basket negative pressure catheter, which relates to the technical field of stone removal medical instruments and structurally comprises a first tube and a second tube, and the first tube slides relative to the second tube. A net basket is arranged at the tail end of the first pipe; a stone crushing part sliding relative to the first pipe is arranged in the first pipe, an energy release part is arranged at the tail end of the stone crushing part, and the center of the mesh basket and the center of the energy release part are coaxial with the first pipe; the head end of the first pipe is bifurcated and is provided with at least two first interfaces or a connecting piece, and the connecting piece at least comprises three second interfaces; wherein one of the first interface or the second interface is connected with a negative pressure mechanism. According to the coaxial net basket negative pressure catheter, the stone is fixed in the net basket through the binding effect of the net basket, the position between the energy release part and the stone basically does not move relatively during stone crushing, the stone crushing efficiency is higher, and the operation time is shortened; other tissues are not damaged, and higher safety is realized; the lens is protected and is prevented from being damaged by gravel energy; and non-direct-vision touch typing is realized in combination with a contrast agent.

Disclosed is a foreign body removal device, relating to the field of medical instruments. The foreign body removal device comprises a foreign body removal part (100), an adjustment part (200), and an operation part (500). One end of the foreign body removal part (100) is weaved and gathered to form a gathered part (120), the operation part (500) is fixedly connected to the tail end of the gathered part (120), the adjustment part (200) is annularly arranged on the outer side of the gathered part (120), and one end of the adjustment part (200) is fixedly connected to the operation part (500). The overall diameter of the foreign body removal device is extremely small, which is reduced by 50% or more compared with the overall diameter of a traditional stone removal basket product, and the foreign body removal device can be directly fed into a smaller cavity. The positions such as the biliary tract and the intestine can be easily reached, and meanwhile, the effective rotation of the foreign body removal part (100) can be ensured under various bends, thereby greatly expanding the application range of stone removal and foreign body treatment.

This invention provides a novel medical device for performing precise urological procedures, specifically focusing on urological stone removal. The illustrative Stone Removal Robot leverages multiple subsystems to autonomously remove stones while using real-time image guidance for precise targeting and minimal collateral damage. This system is particularly suited for use in urology, though its applications can extend to other surgical fields. The key benefit of this invention lies in its ability to provide enhanced accuracy, reducing the potential for human error, while integrating multiple lithotripsy methods termed herein, Method1, Method2, Method3, which may incorporate cooling to protect surrounding tissues. The system can be adapted for autonomous operation.

The invention belongs to the technical field of urinary surgery minimally invasive medical instruments, and particularly relates to a urinary system calculus removing device and a urinary system calculus removing method.The urinary system calculus removing device comprises a shell, the front end of the shell is fixedly connected with a guiding hose, and a lens through hole, a water inlet hole and a laser guide wire through hole are formed in the guiding hose; the tail end of the shell is connected with a water inlet of the filtering component through a pipeline, an air inlet of the filtering component is connected with a negative pressure suction machine through a pipeline, a water inlet pipe is arranged on the side wall of the shell, and the water inlet pipe penetrates through the shell to be connected with the water inlet hole. The lens through hole, the water inlet hole, the laser guide wire through hole, the smashing component through hole and the telescopic rod through hole are formed in the shell, independent operation of each work is guaranteed, stone smashing, grinding and collecting are conducted synchronously, the laser guide wire does not need to be pulled out or instruments do not need to be replaced in the operation, and the operation efficiency is greatly improved.

The stone removal device of this invention includes a removal mechanism, an outer sheath, a handle grip, and a control mechanism. The removal mechanism includes a removal end and a connecting part; the removal end is located at the distal end of the connecting part, and the proximal end of the connecting part is connected to the control mechanism; the removal mechanism is built into the outer sheath; the handle grip is located at the proximal end of the outer sheath. Before entering the cavity, the removal end is built into the outer sheath; after entering the cavity, the control mechanism controls the removal end to enter and unfold within the cavity via the connecting part, thus removing the attached stone. The removal end is made of medical-grade elastic material, which not only has good strength to ensure the removal effect, but also has deformation capability. When the force is too great, it can undergo moderate elastic deformation, preventing accidental damage to surrounding tissues due to excessive force or sharp edges, making clinical use safer.

The present application relates to the technical field of medical devices, in particular to a dilatable sheath type endoscopic biliary mud-like stone removal device, which comprises an outer sleeve, a flushing unit, a hollow working sheath, a spiral inner core assembly, a rotary drive unit and a vibration generating unit. The flushing unit, flexible conducting rod, spiral blade and vibration generating unit work together to continuously discharge the biliary mud-like stones. The positive pressure of the flushing liquid forms a forward flow in the bile duct, and the axial conveying force of the spiral blade discharges the stones in the outward direction, effectively avoiding the stones being pushed to the distal end of the bile duct, improving the complete removal rate of the stones, overcoming the problems of the existing dredging device, such as easy adsorption to the bile duct wall when using negative pressure suction, causing mucosal vessel rupture, and possibly sucking bacteria from the duodenal papilla into the bile duct, causing infection, and greatly improving safety.

The invention discloses a nipple dilation system. The nipple dilation system comprises a conveying assembly and a dilator. The conveying assembly comprises a first pipe body and a second pipe body which are both of a hollow structure, and the first pipe body is arranged on the outer side of the second pipe body in a sleeving mode. The dilator is configured to be contracted between the first tube body and the second tube body when not in a working state and released by the relative movement of the first tube body and the second tube body when in a working state, and the released dilator expands in the radial direction so as to dilate a narrow duodenal papilla opening to a preset diameter. And a temporary calculus removing channel is established. The dilator only mechanically and temporarily dilates the duodenal sphincter without damaging the duodenal sphincter, and the duodenal sphincter recovers to the initial state after the dilator is taken out. Therefore, when the nipple dilatation system is used for assisting calculus removal operation, the sphincter is only subjected to temporary and recoverable dilatation and cannot be cut, it can be guaranteed that the function of the duodenal sphincter cannot be lost, and noninvasive dilatation is achieved.

The utility model relates to the technical field of medical instruments, in particular to a urinary plugging calculus removal catheter capable of achieving negative pressure suction, which comprises a catheter body, one end of the catheter body is a plugging part, the other end of the catheter body is connected with a negative pressure device, the plugging part is configured to be switched between an opening state and a containing state, and when the plugging part is in the opening state, the negative pressure device is connected with the negative pressure device. The plugging part is bent to form a spiral plugging structure, and a plurality of suction openings used for sucking broken stones under the negative pressure effect of the negative pressure device are formed in the plugging part. According to the utility model, the plugging part and the suction port on the plugging part are utilized to integrate the functions of plugging, calculus removal and the like, so that the times of taking out and entering a human body cavity caused by insufficient endoscope cavities are reduced, the injury of the instrument to the human body cavity is reduced, the pain of a patient is reduced, and the working efficiency is improved. In addition, the broken stones are sucked through negative pressure, so that the problem that a mesh basket is loose when a traditional mesh basket is pulled during stone removal can be avoided, and stone removal is more thorough.

A removable cap for an endoscope for use with a surgical laser to improve the stone removal rate (SFR) of lithotripsy procedures. The removable cap includes a filter configured to block or filter light at a wavelength that is an optical wavelength from an aiming beam generated by the surgical laser.

The present invention discloses a novel blocking and stone removal catheter, comprising a controller, one end of the controller is provided with a non-slip handle, the other end is connected to the catheter through a movable tube support, the lower end is provided with a tube support tightening button, the top is provided with a tube groove, one side of the top is provided with a fixed tube support, the upper end is provided with a hydrogel storage tube, and one side is provided with a tube push knob, the hydrogel storage tube stores hydrogel, the outlet end is connected to the hydrogel delivery tube, a piston is provided inside, the other end of the hydrogel delivery tube is connected to the needle tube, the catheter is connected to the scope gap through the scope tube, connected to the hydrogel delivery tube gap through the hydrogel tube, connected to the occluder gap through the occluder tube, and connected to the laser lithotripter gap through the optical fiber tube, the occluder comprises a mesh cover deployment controller, a wrapping tube and a memory metal mesh cover, and by providing hydrogel-assisted lithotripsy, the problems of insufficient blocking force in the basket structure, the basket formed when the occluder is opened having gaps, and the inability to completely block the lithotripsy, etc. are solved.

This invention relates to the field of medical device technology, and in particular to an integrated device for lithotripsy and stone removal of kidney stones with adjustable aperture, comprising an integrated tube; the integrated tube further comprises a lithotripsy module and a lithotripsy extraction module, and the other end of the lithotripsy module and the lithotripsy extraction module are connected to a pressure regulating module, which is used to adjust the air pressure in the internal pipes of the lithotripsy module and the lithotripsy extraction module respectively; during the lithotripsy and stone removal process, there is no need to repeatedly change the device, which can reduce damage to the patient and improve the efficiency of lithotripsy and stone removal. A flexible connector is provided between the laser lithotripsy probe and the connecting tube, and a first flexible air tube is arranged on its outer side; by injecting air into the first flexible air tube at different positions through the external pressure regulating module, air pressure difference is formed in each air tube, driving the controllable cover to bend, thereby driving the laser lithotripsy probe to deflect, realizing the adjustable probe angle, which facilitates precise fragmentation of stones at different positions and ensures the quality of lithotripsy.

The utility model provides a transsinus choledochoscope calculus removal isolation drainage device. Comprising an adhesive layer, the adhesive layer is provided with an upper side edge and a lower side edge which are opposite, and the adhesive layer is provided with a notch which is concaved inwards from the upper side edge to the lower side edge. The outlet water receiving device comprises a front surface and two side surfaces positioned on two opposite sides of the front surface, attaching parts are formed on the peripheries of the front surface and the two side surfaces, the outlet water receiving device is attached to the adhesive layer through the attaching parts, the adhesive layer, the front surface and the two side surfaces surround to form a containing space, and the containing space is provided with an upper side edge with an opening facing the adhesive layer; the side face can be divided into two folding faces through a folding line, the two folding faces can be bent along the folding line, flexible fixing pieces are arranged on the two folding faces in an extending mode, the two folding faces are oppositely bent into different angles and fixed through the flexible fixing pieces, and the size of the containing space and the size of the opening of the containing space can be changed. The filter screen detachably covers the opening of the containing space, and the arrangement position of the filter screen is lower than the notch of the pasting layer. And the drainage tube is communicated with the accommodating space of the outlet water container.

The invention discloses a flexible bionic grabbing instrument for ureteroscope calculus removal and an operation method of the flexible bionic grabbing instrument, and belongs to the technical field of medical instruments. Comprising a handheld pipe, a connecting circular plate is fixedly connected to the right side of the handheld pipe, a control mechanism is arranged on the right side of the connecting circular plate, a flexible pipe is fixedly connected to the left side of the handheld pipe, and a clamping mechanism is arranged at the left end of the flexible pipe; the multiple flexible clamping plates are connected with the flexible pipe through the first rotating pieces, and matched with a linkage structure of the elastic pulling pieces and the pulling plates, the folding angle can be adjusted in a self-adaptive mode according to the size and shape of broken stones during clamping, wrapping type clamping of the broken stones is achieved, compared with traditional single-point or linear contact clamping, the contact area is greatly increased, meanwhile, the clamping efficiency is greatly improved, and meanwhile the clamping effect is good. The anti-slip strips integrally formed on the inner side walls of the flexible clamping plates can effectively increase friction resistance with the surfaces of the broken stones, and stable holding can be achieved even if the broken stones with smooth surfaces and adhered with mucus are used.

A method and system for guiding renal stone removal. The method includes steps for facilitating or guiding three stages of the intervention: renal access, stone removal, and a stone-free check. This is facilitated by a method which includes three stages: an intra-operative image guidance phase for obtaining CT-based imagery of the renal area; a renal access guidance phase in which the aforementioned CT-based imagery is used to generate intervention guidance imagery to guide renal access, and a stone-free check phase in which further intra-operative CT images are acquired to check the stone-free status of the patient.

This invention discloses a multifunctional percutaneous nephrostomy kit, relating to the field of kidney stone surgery. It includes an outer sheath with a hollow working channel inside, and a flexible endoscope sheath inserted into the working channel of the outer sheath. The bottom of the flexible endoscope sheath has a curved section. This invention inserts the flexible endoscope sheath into the outer sheath and then inserts a flexible endoscope into the flexible endoscope sheath. The bend on the flexible endoscope can drive the curved section on the flexible endoscope sheath to bend, placing the curved section in a bent state. By rotating the bend on the flexible endoscope, the orientation of the curved section can be changed, allowing for the extraction of stones at the insertion point of the outer sheath and in the area surrounding and above the insertion point, effectively improving the stone removal effect. Simultaneously, a fixing mechanism is provided to clamp the outer sheath with multiple clamping plates, eliminating the need for medical personnel to hold it by hand and ensuring the accuracy of subsequent operations.

The utility model provides a biliary tract calculus removing channel device, and particularly relates to the field of medical instruments. Aiming at the problems of gas leakage and stability of a calculus removing channel caused by a traditional calculus removing channel device, the utility model provides the calculus removing channel device for the biliary tract, which comprises a calculus removing channel used for entering a choledochoscope and performing calculus removing operation, and a sealing lead-in assembly is connected to an inlet of the calculus removing channel. The abdominal wall section of the calculus removing channel is provided with a fixing assembly for preventing the calculus removing channel from shifting or leaking air in the operation process. According to the device, through the sealing guide-in assembly and the fixing device, the requirement for repeated positioning in the operation is reduced, and the air tightness in the operation process is guaranteed.

This invention discloses a novel stone retrieval device for clinical use in hepatobiliary surgery, comprising an operating tube with a cavity inside. A connecting tube is sealed and installed through the bottom of the cavity, and multiple lighting lamps are installed at the bottom of the connecting tube. Two clamping plates are symmetrically connected to the bottom of the operating tube via two connecting mechanisms. Threading rings are fixedly connected to opposite sidewalls of the two clamping plates. The connecting tube extends between the two clamping plates. A clamping drive mechanism is provided at the upper end of the operating tube. This invention has a reasonable structural design, which not only illuminates the wound for easy stone retrieval but also draws the stone into the cavity, preventing unstable clamping and subsequent re-falling into the wound. It also facilitates the re-retrieval of residual stones within the wound, ensuring stone retrieval stability and efficiency. Furthermore, it allows for easy cleaning of the cavity after stone retrieval, facilitating subsequent stone retrieval procedures.

This invention provides a stone retrieval device for hepatobiliary surgery, comprising an operating shell with a slidably mounted button. A mounting frame is slidably mounted inside the operating shell, and two sets of stone retrieval clamps are mounted on the mounting frame. A drive frame is also slidably mounted inside the operating shell, connected to the button via a drive mechanism to convert the sliding of the button into the sliding of the drive frame. The drive frame has a linkage unit connected to the mounting frame, which converts the sliding of the drive frame into the sliding of the mounting frame, simultaneously driving the two sets of stone retrieval clamps to close and open upon approaching the operating shell. A receiving mechanism is provided on the operating shell, which slides below the stone retrieval clamps to receive the stones when the two sets of stone retrieval clamps open. This stone retrieval device can automatically collect stones during the stone retrieval process, eliminating the need for repeated instrument movement, reducing stone retrieval steps, improving surgical safety, and lowering the risk of stone residue.

1. Name of the product in this design: Flexible grasping forceps for ureteroscopic stone removal. 2. Application of this design: This design is used for flexible stone retrieval under ureteroscopy. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.