41results about How to "Increase drainage speed" patented technology

The invention relates to an electronic cigarette and an atomization device thereof. The atomization device comprises a smoke channel, a juice storage cavity, a juice guide pipe and a heating piece, wherein the smoke channel is used for smoke to pass through, the juice storage cavity is separated from the smoke channel and used for storing tobacco juice, the juice guide pipe is arranged transversely relative to the smoke channel and comprises a first section and a second section communicated with the first section, the first section is communicated with the juice storage cavity, the second section is located in the smoke channel and comprises multiple juice outlets which are formed in the side wall of the second section and used for the tobacco juice to ooze out from inside to outside, the juice guide pipe is a hollow meshed pipe, the meshes of the meshed pipe form the juice outlets, and the heating piece is arranged on the second section to heat and atomize the tobacco juice oozed out from the juice storage cavity. The juice outlets are formed in the second section, located in the smoke channel, of the juice guide pipe, the tobacco juice oozes outside the juice guide pipe from the juice outlets through an inner pipe of the juice guide pipe, the juice guide speed of the juice guide pipe can be increased, and the smoke volume of the atomization device is increased.

The invention discloses a portable chest drainage device for the thoracic surgery department. The device comprises a liquid storage box, a liquid level sensor is arranged in an inner cavity of the liquid storage box, a liquid outlet is formed in the side face of the liquid storage box, a first drainage pipe, a second drainage pipe and a connection pipe are arranged at the upper end of the liquid storage box, the connection pipe is arranged behind the first drainage pipe and the second drainage pipe, and a first flow sensor is arranged in the pipe wall of the first drainage pipe. The portable chest drainage device for the thoracic surgery department is provided with a current limiting ring of a soft body structure and can be firmly attached to a human body, liquid cannot flow out of the current limiting ring, and the phenomenon that liquid flows in a scattered mode is avoided; a horn-shaped suction nozzle is provided so that liquid can be adsorbed in a large area, drainage speed is increased, and work efficiency is improved; an ultraviolet lamp is arranged so that places near the ultraviolet lamp can be effectively sterilized; sterilization liquid cannot be generated, and the structure is simple; all equipment is controlled by a controller, and medical staff can operate the device conveniently.

The invention provides an atomization core and an atomization device. The atomization core comprises a liquid absorbing body, a cover plate and a heating assembly, wherein the liquid absorbing body isprovided with a plurality of liquid inlet holes; the cover plate is arranged on the first surface of the liquid absorbing body and is matched with the liquid absorbing body to form an atomization cavity; the liquid inlet holes communicate with the atomization cavity, and the cover plate is provided with a plurality of smoke through holes; and the heating assembly comprises a heating film arrangedon the first surface and located in the atomization cavity, and the heating film is used for heating and atomizing liquid on the first surface when being powered on. According to the atomization core, the oil guide speed of the atomization core can be increased, and meanwhile, the problem of liquid leakage can be prevented.

The invention provides an anti-backflow biliary tract drainage support. The biliary tract drainage support includes (a) a support section (10) of a hollow tube-shaped structure; and (b) a drainage section (20), wherein the drainage section (20) includes a base (21) connected to the support section (20), petaloid members (23) (22) which extend from the base to a far end, and block-like structures (25) positioned at a near side. The biliary tract drainage support can ensure drainage of the biliary tract, can effectively prevent backflow of content of duodenums, and then can reduce the opportunities of support blocking and biliary tract infections.

The invention discloses a head and neck lymph drainage regulation and control instrument and a use method thereof, and relates to the field of clinical neurology (neurosurgery and neurology). The head and neck lymph drainage regulation and control instrument comprises a drainage pump and a drainage head sleeve. The drainage head sleeve comprises a head beam, a locking knob, pressing earmuffs, an inflation bandage and an air pipe. An air bag structure is used for replacing human hands for massage, and the drainage speed of a lymphatic system to brain metabolites is increased by pressing lymphatic tissues in front of ears, behind ears and at the lower jaw, so that the purposes of reducing intracranial pressure and discharging toxic macromolecular proteins generated by metabolism of the brain tissues out of the cranium are achieved. When the physical method is used for massaging the head lymph of a patient, the discharge of intracranial harmful substances can be accelerated, the intracranial pressure of the patient can be reduced, the opportunity that the patient is subjected to surgical treatment can be reduced or avoided, the accumulation of intracranial harmful metabolites of the craniotomy patient can be reduced, the postoperative infection risk can be reduced or avoided, the discharge of head metabolic toxic macromolecular proteins can be accelerated, and the memory, sleep and neurocognition can be improved.

The invention discloses a liver and gall drainage device, and belongs to the field of medical instruments. According to the technical scheme, a compression mechanism moves to suck pus and blood clotsin a human body into a feeding mechanism, the compression mechanism moves to drive a steel wire to move in the feeding mechanism; one end of the steel wire is wound around the side wall of a roller, and the steel wire moves to drive the roller to rotate, so that the steel wire is unwound from the side wall of the roller; the roller rotates to drive a semicircular supporting block and a sharp headto rotate; the supporting block and the sharp head make contact with pus and blood clots entering the feeding mechanism; the sharp head rotates to crush the pus and the blood clots; meanwhile, the semicircular supporting block drives a conical protrusion to rotate, and the protrusion rotates to make contact with pierced pus and blood clots; and the protrusion rotates to scatter pus and blood clots, the feeding mechanism is prevented from being blocked by the pus and the blood clots, smooth drainage is guaranteed, blockage of the device in the drainage process is prevented in a physical crushing mode, other liquid media are not needed in the whole process, and unnecessary operation risks are reduced.

The invention discloses a multi-chamber washable drainage pipe comprising a ditch groove drainage section, a chamber drainage section, an infusion device a washing chamber and a treatment chamber; the ditch groove drainage section is connected with the chamber drainage section; the washing chamber and the treatment chamber are installed at the inner of the tube walls of the ditch groove drainage section and the chamber drainage section; the washing chamber wall is provided with multiple washing water outlets, and the washing water outlets are in the ditch groove drainage section. Under the case of continuous drainage, normal saline or sterile water can be injected into the washing chamber by means of insert-type washing needles to solve the problem of drainage pipe blocking; medicine can also be injected into the treatment chamber to apply medicine to focuses for increasing treatment effects; in operations of specific departments, gas can be injected into the treatment chamber for increasing pressure difference between inside and outside of a body and increasing drainage efficiency. The multi-chamber washable drainage pipe is convenient for usage and easy to operation, and has high drainage efficiency; by means of the multi-chamber washable drainage pipe, burden of medical personnel and pain of patients are both mitigated.

The invention discloses a novel electronic commerce operation platform and an operation method, which comprises a spider surplus platform, a stationing merchant, a platform own consumer and a stationing merchant own consumer. Wherein, the platform own consumer comprises a stationing merchant, the self-owned consumer of the stationing merchant enters the spider premium platform and is bound to thestationing merchant through the way of registering the merchant or scanning the two-dimensional code of the merchant. At the same time, the self-owned consumers between different businesses can set rebate points to other businesses, and the rebate points are set by the merchants where the consumers are located independently. The platform provides the consumer money guarantee service for the consumers to purchase the related commodities of the stationed businesses. Users who do not register independently through any merchant and independently registered users who access the platform through offline and online activities and scanning platform QR codes are regarded as platform own consumers, and are permanently fixed as platform own consumers by the system, and their consumption return pointis directly returned to the platform. In addition, the platform provides management, free stationing, advertising, ranking system. The merchant management system independently developed by the invention can help the merchants to save a lot of unnecessary system and operation flow of personnel.

The invention discloses a drainage pipeline system with a ventilation device. The drainage pipeline system comprises a reserve mining block and a water pump water absorption tube, a stoping mining block is arranged on one side of the reserve mining block, a mining tunnel is arranged around the reserve mining block, one side, away from the reserve mining block, of the stoping mining block is provided with a drainage pipeline, a ventilating duct is arranged above the stoping mining block, the drainage pipeline is arranged above both the stoping mining block and the reserve mining block, a watersump is arranged below the stoping mining block, a water sump water inlet pipe is arranged on the front surface of the water sump, a liquid level detector is arranged on one side of the interior of the water sump, and a water sump protective screening is arranged close to a position above the liquid level detector inside the water sump. Workers passing the periphery of the water sump can be conveniently protected by the water sump protective screening, the problem of safety accidents caused by too deep water of the water sump is avoided, meanwhile, ore falling into water can be conveniently cleared, and the problems that stones falling into the water are difficult to clear and influence the water storage of the water sump are avoided.

The invention discloses a portable chest drainage device for thoracic surgery, which comprises a liquid storage tank, a liquid level sensor is provided in the inner cavity of the liquid storage tank, a liquid outlet is provided on the side of the liquid storage tank, and the liquid storage tank The upper end of the first drainage tube is provided with a first drainage tube, a second drainage tube and a connecting tube. The connecting tube is arranged behind the first drainage tube and the second drainage tube. The sensor, the portable chest drainage device for thoracic surgery, has a flow limiting ring with a soft structure that can be firmly attached to the human body, so that the liquid will not flow out of the flow limiting ring, avoiding the phenomenon of turbulent liquid flow, and is equipped with a horn-shaped The suction nozzle can absorb liquid in a larger area, thereby speeding up the drainage speed and improving work efficiency. It is equipped with an ultraviolet lamp to effectively sterilize the surrounding area without producing disinfectant. The structure is relatively simple and controlled by the controller. All equipment is convenient for medical personnel to operate.

The invention relates to the technical field of drainage devices, in particular to an anti-seepage drainage device used for a common surgery department clinical operation. The anti-seepage drainage device comprises a drainage device body, wherein the top of the drainage device body is fixedly connected with a drainage device upper cover; the bottom of the drainage device upper cover is fixedly provided with a drainage device machine body; a drainage device outer frame is surrounded and fixed on the outer side of the drainage device machine body; the top of the drainage device upper cover is provided with an anti-seepage mechanism; the anti-seepage mechanism comprises a drainage tube; the top of the drainage device upper cover is fixedly connected with a drainage tube; the outer side of thetop end of the drainage tube is fixedly provided with a first fixing plate; two sides in an adding tube are independently provided with the first fixing plate; and the bottom of the adding tube is fixedly provided with a second fixing plate. By use of the anti-seepage drainage device disclosed by the invention, the problem that the drainage device does not have an anti-seepage function is solved,sealing performance in the tube is improved, liquid can be effectively prevented from flowing to the outside, efficient drainage speed is realized, and the anti-seepage drainage device is favorable for improving the working efficiency of a doctor.

The invention relates to the technical field of medical instruments, in particular to an incision and drainage device used for urinary surgery. The incision and drainage device used for urinary surgery comprises a drainage box, wherein an operation box is welded to the upper surface of the drainage box, a liquid discharge pipe is welded to the lower end of one side of the drainage box in a penetrating mode, a transparent window is installed on the front surface of the drainage box, a drawer is slidingly installed on the outer surface of one side of the operation box, control keys are installedon the front surface of the operation box, a handle is installed on the upper surface of the operation box, a first connector is installed on one side of the upper surface of the operation box in a penetrating mode, a second connector is installed in a position, close to the first connector, on one side of the upper surface of the operation box in a penetrating mode, liquid pumps are installed onone side of the interior of the operation box, and single chip microcomputers are installed in positions, close to the liquid pumps, on one side of the interior of the operation box. According to theincision and drainage device used for urinary surgery, incision and drainage can be used in cooperation, two drainage components are arranged, drainage is conducted through the independent liquid pumps, and the incision and drainage device used for urinary surgery can be used repeatedly.

The invention provides an air duct shell and an air conditioner, and relates to the technical field of air conditioners. The air duct shell is provided with an air outlet, a fan blade cross beam is erected at the air outlet, the fan blade cross beam is provided with a cross beam inner side face and a cross beam outer side face which face the inner side or the outer side of the air outlet respectively, a water diversion rib is arranged on the bottom face of the fan blade cross beam, the two ends of the water diversion rib extend to the cross beam outer side face and the side wall of the air duct shell respectively, and the water diversion rib is used for guiding condensate water attached to the cross beam outer side face to the side wall of the air duct shell. Compared with the prior art, the air duct shell can guide the condensate water gathered on the fan blade cross beam to the side wall of the air duct shell by arranging the water diversion rib, the condensate water is prevented from directly dripping into the air conditioner from the fan blade cross beam, and the safety of the air conditioner is improved.

The invention discloses a liver and gall drainage tube which comprises a drainage tube body, one end of the drainage tube body is communicated with a drainage device, the bottom of the drainage device is connected with a liquid drainage tube, the liquid drainage tube is provided with a liquid drainage valve, the end, away from the drainage device, of the drainage tube body is connected with a puncture head, and the tip end of the puncture head is provided with a puncture head opening. A medicine guide tube is fixedly arranged on the inner side face of the drainage tube body, a plurality of medicine guide holes are formed in the medicine guide tube, a medicine inlet tube communicated with the medicine guide tube is arranged on the outer side face of the drainage tube body, a medicine inlet is formed in the top of the medicine inlet tube in a connected mode, and a medicine inlet cover is detachably arranged on the medicine inlet. A plurality of elastic support plates are arranged in the drainage tube body between the puncture head and the medicine guide tube, and drainage ports are formed among the elastic support plates. The drainage tube has the following advantages that the drainage efficiency is high, the drainage speed is high, liquid medicine can be added into the drainage tube, the treatment effect can be achieved, the puncture head is combined with the drainage tube, and the pain caused by multiple times of puncture is avoided.

The invention belongs to the technical field of thyroid treatment, and particularly relates to a special negative pressure drainage device for thyroid surgery, which comprises a first drainage tube, a second drainage tube and negative pressure equipment, the outer wall of the first drainage tube is connected with the outer wall of the second drainage tube, the bottom of the first drainage tube and the bottom of the second drainage tube are provided with openings, and a first silica gel backflow prevention sheet is arranged in each opening. The top of the first drainage tube and the top of the second drainage tube are communicated with an inner cavity of the first transverse tube. During use, seepage in the body of a patient can be rapidly extracted through the first drainage tube and the second drainage tube, and due to the fact that the left side and the right side of the first transverse tube are connected with negative pressure equipment through liquid outlet tubes, when one drainage tube is blocked, the negative pressure equipment can be rapidly extracted; when the drainage tube is blocked, the pressure intensity in the blocked drainage tube changes, at the moment, the second silica gel backflow prevention piece is opened, suction force in the two liquid outlet tubes is concentrated in the unblocked drainage tube, the drainage speed is increased in a self-adaption mode, and the situation that the drainage speed is low, and seepage in the body of the patient cannot be extracted in time is avoided.

The invention discloses a brain abscess precise puncture drainage device which is composed of a puncture drainage tube and a metal guide core in the puncture drainage tube, the puncture drainage tube is designed to be of a hollow cylinder structure, the two ends of the puncture drainage tube are open, and the far end of the metal guide core is provided with a puncture head with an electromagnetic navigation function, preferably a navigation probe, in an operation process, electromagnetic navigation is utilized, the position of the current puncture head can be determined, whether deviation exists or not can be accurately judged in the operation process, and meanwhile the position relation between the puncture drainage catheter and the abscess wall can be observed. After the puncture head reaches the abscess wall, the metal guide core is electrified, and the current reaches the puncture head through the metal guide core, so that the abscess wall can be easily opened. According to brain abscess precise puncture drainage device, the surgical operation difficulty can be reduced, the accuracy is improved, the risk of pus exosmosis is reduced, and the surgical safety is improved.

The invention discloses novel marble sewage treatment equipment. The novel marble sewage treatment equipment comprises a reserved ore block and a water pump water-suction pipe, a stoping ore block isarranged on one side of the reserved ore block, an ore mining tunnel is arranged around the reserved ore block, a drainage pipeline is arranged on the side, away from the reserved ore block, of the stoping ore block, a ventilating pipeline is arranged on the upper part of the stoping ore block, the upper part of the stoping ore block and the upper part of the reserved ore block are provided with drainage pipelines correspondingly, a water sump is arranged on the lower part of the stoping ore block, a water sump water inlet pipe is arranged on the front surface of the water sump, a liquid leveldetector is arranged on one side inside the water sump, and a water sump protective net is arranged on the upper part, close to the liquid level detector, inside the water sump. The water sump protective net conveniently protects workers passing by the water sump, the problem of safety accidents caused by the excessively large water level of the water sump is avoided, meanwhile, ore falling intowater is also cleared conveniently, and the problems that stone falls into the water sump, consequently clearing is inconvenient, and water storage of the water sump is affected are avoided.

The invention discloses a bathroom waterproof and overflow-proof drainage device. The bathroom waterproof and overflow-proof drainage device includes a mining block to be mined and a water pump suction pipe; a back mining block is arranged on one side of the mining block to be mined, and mining channels are arranged around the mining block to be mined; the back mining block is provided with a drainage pipe on the side away from the mining block to be mined, and a ventilation pipe is arranged above the back mining block; drainage pipes are arranged above the back mining block and the mining block to be mined, and a water tank is arranged below the back mining block; a water tank inlet pipe is arranged on the front surface of the water tank, and a liquid level detector is arranged on one inner side of the water tank; and a water tank protection net is arranged inside the water tank near the upward side of the liquid level detector. The water tank protection net facilitates the protectionof workers passing around the water tank, therefore, the problem of safety accidents caused by the too deep water level in the water tank is avoided; and meanwhile, the water tank protection net is also convenient to clean the ore falling into the water, therefore, the problem that the water storage capacity of the water tank is affected by the inconvenience of cleaning the stone falling into thewater tank is avoided.

The present invention relates to the technical field of medical care products, and in particular relates to a male urine drainage device, comprising an ultra-thin plastic film urine bag wrapping a male penis for receiving urine, a drainage hole arranged in the urine bag, and a film type high-flux drainage pipe connected with the drainage hole of the urine bag and communicating with the urine bag,wherein the thickness of the ultra-thin plastic film urine bag is not larger than 0.025 mm, and the circumference of the internal diameter of the film type high-flux drainage pipe is not less than 35mm. According to the invention, the comfort of the drainage device is effectively improved, the nursing workload is reduced, and the manufacturing cost of the drainage device is reduced.

The invention provides an abdominal cavity drainage device for medical oncology, and belongs to the technical field of abdominal cavity drainage instruments. The abdominal cavity drainage device for medical oncology comprises a drainage collecting assembly, a negative pressure adjusting assembly and a cleaning assembly. The drainage collecting assembly comprises a liquid collecting barrel, a drainage pipe, a first flow regulator, a pressure gauge and a connecting pipe, the first flow regulator is installed outside the drainage pipe, one end of the drainage pipe is communicated with the top ofthe liquid collecting barrel, and one end of the connecting pipe is communicated with the port of the pressure gauge, the other end of the connecting pipe is communicated with the top of the liquid collecting barrel, and the negative pressure adjusting assembly comprises an elastic breathing bag, an exhaust pipe, an air outlet pipe, a first one-way valve and a second one-way valve. According to the invention, while abdominal effusion is drained, normal saline in the normal saline bag flows into the abdominal cavity through an infusion tube to clean the interior of the abdominal cavity, waste liquid obtained after cleaning flows into the liquid collecting barrel along the drainage pipe, cleaning and drainage are conducted at the same time.

A hollow negative pressure drainage container belongs to the technical field of medical instruments. The hollow negative pressure drainage container comprises a negative pressure drainage container body, a transition tube, a drainage tube and a stab knife, wherein the wall body of the negative pressure drainage container body is of a corrugated shape in the height direction, and an adapter base is arranged on the central location on the top of the negative pressure drainage container body, one end of the transition tube is fixedly connected with an adapter joint, the adapter joint is connected with the adapter base in a matching mode and is communicated with a container cavity of the negative pressure drainage container body, the other end of the adapter joint is fixedly connected with a T-junction, the middle portion of the transition tube is provided with a pipe clamp, the slab knife is connected with one end of the drainage tube, the other end of the drainage tube is connected with the T-junction, and liquid gathering holes which are communicated with the tube cavity of the drainage tube are distributed on the tube wall of the drainage tube. The hollow negative pressure drainage container has the advantages that not only the structure is simple, but also the manufacture is convenient, the drainage speed is quickened and the drainage time is shortened.

The invention discloses a novel drainage device for neurosurgical operation, wherein the drainage device comprises a speed regulating device and a sealing device. According to the drainage device forneurosurgical operation, by adjusting mutual meshed combination of a big gear and a small gear, the drainage speed of paddle blades can be changed, and the drainage speed and pressure can be rapidly adjusted, the drainage speed and pressure of the drainage device can be quickly adjusted, and the use safety of the drainage device is increased. Through arrangement of the sealing device inside a tankbody, when the drainage device is not used, a sealing plate can be clamped on the upper end of an air suction pipe, so that the air suction pipe is in a sealed state, and then dust is blocked. Duringdrainage, a connecting block is pulled to the right end to move to the right end via a connecting rod mechanism, a push rod drives the sealing plate to release the sealing state of the air suction pipe, and the air suction pipe can work normally. The advantages of keeping the sealing state inside the air suction pipe when the drainage device is not used and no dust sticking inside the air suctionpipe are achieved.

The invention discloses a downhole sludge discharging device, comprising a prepared mining block and a water pump suction pipe, wherein one side of the prepared mining block is provided with a stopingmining block; a mining tunnel is arranged around the prepared mining block; one side, far away from the prepared mining block, of the stoping mining block is provided with a drain pipe; a ventilationpipe is arranged above the stoping mining block; drain pipes are arranged above the stoping mining block and the prepared mining block; a water tank is arranged below the stoping mining block; a water tank inlet pipe is arranged on the front surface of the water tank; a liquid level detector is arranged on one side in the water tank; and a water tank protection net is arranged, near the liquid level detector, of the upper part of the water tank. The water tank protection net conveniently protect workers who pass around the water tank, avoids the problem of safety accidents caused by the deepwater level in the water tank, and also conveniently clean ore falling into water, avoiding the problem that water storage in the water tank is influenced due to the inconvenience in cleaning stones falling into the water tank.

The invention provides a novel municipal management environment-friendly urban construction drainage device, and relates to the field of municipal drainage. The novel municipal management environment-friendly urban construction drainage device comprises a positioning connecting device, a flow guiding device, a drainage device and a filtering device, wherein the flow guiding device is fixedly mounted at the top end of the positioning connecting device; the bottom end of the positioning connecting device is fixedly connected with the drainage device; the filtering device is fixedly mounted at the bottom end of the inside of the drainage device; the positioning connecting device comprises a positioning connecting plate; a fixed mounting groove is formed in the top end of the positioning connecting plate; a positioning connecting edge is fixedly mounted in the fixed mounting groove; and the inside of the positioning connecting edge is rotatably connected with a fixed connecting edge. According to the drainage device, a combined flow guiding plate of the fixed connecting edge and a flow distributing connecting column is rotatably mounted in a rotating connecting groove through a rotating connector and two rotating connecting inserting columns, then the fixed connecting edge rotates, thus, the three positioning connectors are clamped in the positioning mounting groove, water flow enters a sewer conveniently, and the drainage speed of the water flow is increased.

The invention discloses a shale gas flowback sewage treating system. The sewage treating system comprises reserve ore blocks and a water pump water absorption tube, stoping ore blocks are arranged onone sides of the reserve ore blocks, a mining tunnel is arranged on the periphery of the reserve ore blocks, one sides, far away from the reserve ore blocks, of the stoping ore blocks are provided with water drainage pipes, a ventilation pipe is arranged above the stoping ore blocks, the water drainage pipes are arranged above both the stoping ore blocks and the reserve ore blocks, a water sump isarranged below the stoping ore blocks, a water sump water inlet pipe is arranged on the front surface of the water sump, a liquid level detector is arranged on one inner side of the water sump, and awater sump protection net is arranged close to a position above the liquid level detector inside the water sump; workers passing the periphery of the water sump can be conveniently protected by the water sump protection net, the problem of safety accidents caused by too deep water of the water sump is avoided, meanwhile, ore falling into water can be convenient to clear, the problems that stonesfalling into the water are difficult to clear and influence the water storage of the water sump are avoided.

The invention discloses an anti-blockage easily inserted three-cavity catheter device, which comprises a catheter, and a blood clot breaker and an inner core, which are matched with the catheter; a spring steel wire is arranged in the wall of the catheter; a saccule is arranged on the front of a water cavity; an elliptical hole is formed on the middle ring surface of the saccule; due to the arrangement of the spring steel wire, the wall thickness of the catheter is reduced, an inner cavity of the catheter is enlarged, the blockage is reduced, and the smooth drainage is ensured; the spring steel wire has elasticity, the spring steel wire is squeezed and deformed a little when inserted, is expanded after being inserted, and is elastically fixed with a urethra so as to avoid a urine leakage phenomenon; the saccule is arranged on the front of the water cavity, and is provided with a drainage hole; and when the drainage is not smooth due to blood clots, the blood clot breaker is used for breaking the blood clots to ensure the smooth drainage.