40 results about "Free flap" patented technology

The invention relates to an infant or adult diaper. More particularly, the invention relates to an infant or adult diaper having a first longitudinally extending elastic cuff and a second longitudinally extending elastic cuff each have a distal edge, at least the crotch region of which is not attached to the diaper and forms a free flap.

The invention relates to an infant or adult diaper. More particularly, the invention relates to an infant or adult diaper having a first longitudinally extending elastic cuff and a second longitudinally extending elastic cuff each have a distal edge, at least the crotch region of which is not attached to the diaper and forms a free flap.

Embodiments of the invention include an implantable force distribution boot with hydraulic features that mimic the natural hydraulics of a joint. Further embodiments include an exterior prosthetic leg device having intermittent and / or variable electromagnetic features that can engage with magnetic blades on the implantable force distribution boot. In use, the exterior prosthetic leg can be maintained on a residual limb by magnetic force between the implanted blades and the exterior electromagnets. Also disclosed are surgical techniques for preparing a residual limb to better receive and adapt to a prosthetic device. The techniques include an improved surgical method for harvesting a vascularized glabrous skin free flap.

The present invention relates to methods of ex-vivo modification of mammalian tissue, via genetic transformation or introduction of cells, followed by implantation of the modified tissue into a patient in need thereof. Preferably, the tissue is microvascular free flap (or microvascular bed) tissue. A tissue explant is detached from the native circulation of a donor, transfected ex vivo, and then attached (anastomosed) to a recipient, either the donor or another patient. In a preferred embodiment, the mammalian tissue is human tissue and the patient is a human patient. Transfection with a nucleic acid encoding a product of interest is performed by contacting the selected tissue with a vector, preferably a viral vector, most preferably an adenoviral vector, that comprises the nucleic acid encoding the product of interest. The nucleic acid encoding the product of interest is driven by regulatory element such as an inducible, constitutive or cell-specific promoter, preferably an inducible or constitutive promoter. After genetic transformation of the selected tissue, the tissue is flushed to remove the vector not incorporated into the cells of the tissue. The tissue is then attached to the native circulation of the recipient using microvascular techniques. In one aspect, the invention provides methods of local delivery of a product (protein) of interest. In another aspect, the invention provides methods of systemic delivery of a product of interest. In yet another aspect, the invention provides methods of both local and systemic delivery of a product of interest. In yet another aspect, the invention provides methods for producing a "neo-organ," i.e., a non-naturally occurring vascularized tissue that provides a function of a gland or organ, or that supplements the function of a gland or organ, and that delivers locally or systemically a product of interest to a patient in need thereof.

The invention belongs to the technical field of optical instruments, and especially relates to a wide-field and long-working-distance continuous zooming operating microscope optical system. The system comprises a variable-focus objective system (1), an aperture diaphragm (2), an unfocused zooming system (3), an image rotation system (4), a second objective system (5), and an eyepiece system (6). Optical aberration needing correction of all parts of the system is distributed reasonably, two aspheric surfaces are introduced to correct advanced optical aberration caused by wide-field imaging, and thus, good wide-field microscopic imaging is achieved. As the components between and inside the variable-focus objective system and the unfocused zooming system do complex motion according to different rules, the magnifying power changes continuously, and the position of the image plane is fixed. Long working distance is realized through 'positive and negative' focal power distribution. The system of the invention meets the demand of clinical application, has the advantages of wide field, variable focus, and long working distance, and is particularly applicable to the field of neurosurgery operation or free flap transplant operation demanding a wide field.

The invention discloses a flap traction device used for full-ectomy of the mammary glands. The flap traction device comprises a handle and a plurality of traction units arranged on the handle, whereineach traction unit comprises a slider and a drag hook, each slider can axially move along the handle, each drag hook is arranged on the corresponding slider in a hinging mode, during the surgery process, since the plurality of drag hooks are arranged, the number of position points for lifting the free flaps is increased, one assistant can simultaneously complete the lifting for the flaps on a plurality of position points by two hands by utilizing two flap traction devices, therefore, human resources and space resources are greatly saved, the operation of surgery doctors is facilitated, with the traction device provided by the invention, the defects of the slippage and the unsatisfactory exposure of the surgery field caused by lifting of fingers are also overcome, and thus the continuity and safety of the surgery are guaranteed. In addition, the positions of the drag hooks are adjusted along with the movement of the sliders, the drag hooks are hinged to the sliders, the positions of the drag hooks are adjusted or the direction of the drag hooks is stirred, so that the distances among the lifting points are enlarged or shortened, and thus the use is convenient and flexible.

The invention provides a free skin flap in-vitro distal blood supplying device, and relates to the field of mechanical instruments. The free skin flap in-vitro distal blood supplying device comprises an artery blood supplying unit, a vein blood returning unit, a precise peristaltic pump, a blood anti-freezing device and a temperature control system, wherein the artery blood supplying unit comprises an artery puncture needle, a blood delivery catheter, a flow adjuster, a three-way pipe, a skin flap artery anastomosis needle and an elastic sleeve; the vein blood returning unit comprises a vein puncture needle, a blood delivery catheter, a catheter joint, a three-way pipe, a peristaltic pump pipe, a skin flap vein anastomosis needle and an elastic sleeve; the temperature control system comprises a circulating water pump, a water delivery catheter, a heating catheter and a constant-temperature water tank; the peristaltic pump is precise and is suitable for pumping liquid with medium and small flow; the blood anti-freezing device is a precise injection pump filled with anticoagulant normal saline; and anticoagulant is injected into the artery blood supplying device through a catheter. The free skin flap in-vitro distal blood supplying device is used for distally and continuously supplying blood for free skin flaps circularly in a free skin flap surgery; and the problem that good blood supplying vessels do not exist surrounding a skin flap area is solved.

The invention relates to a thermal infrared image system and a method for analyzing surface temperature influence factors of free flaps. The method includes by a thermal infrared imager, acquiring an actually-measured surface temperature of a free flap of an organism, further acquiring a core temperature of the organism and a room temperature of a located environment, respectively performing thermal conduction and thermal convection operations on the core temperature and the environmental room temperature to generate a predicted surface temperature, judging whether or not the surface temperature influence factors of the free flap is changed according to whether or not the predicted surface temperature is close to the actually-measured surface temperature, and taking a judgment result as the basis for compensation and correction to improve accuracy of acquiring a surface temperature of the free flap as a reference index by the thermal infrared imager.

The invention relates to an infant or adult diaper. More particularly, the invention relates to an infant or adult diaper having a first longitudinally extending elastic cuff and a second longitudinally extending elastic cuff each have a distal edge, at least the crotch region of which is not attached to the diaper and forms a free flap.

In an apparatus for inserting a postal item into an envelope, the envelope is fed with its flap fold trailing its envelope body and its flap along a flap opener. A free flap opener edge enters between the flap and the envelope body until the flap fold abuts the free flap opener edge. While holding the flap against the flap opener, the flap is pivoted relative to the envelope body about the flap fold to an open position and subsequently the postal item is inserted into the envelope body. An apparatus for carrying such a method is also described.

The invention relates to an infant or adult diaper (10) comprising a topsheet (22), a backsheet (24) and there between an absorbent core (20), a first and a second longitudinally extending elastic cuff (30a, 30b), the first and the second elastic cuff (30a, 30b) being positioned on either longitudinal side of the topsheet (22) and opposing each other. The diaper (10) has a crotch region (B), positioned in between a front region (A) and a back region (C) and the first and the second elastic cuff (30a, 30b) each have a crotch region (B'), positioned in between a front region (A') and a back region (C), these regions (A', B', C') being generally positioned in or adjacent to the respective regions (A, B, C) of the diaper (10). The first and the second elastic cuffs (30a, 30b) each have a proximal edge (32), attached to the diaper and a distal edge (34), at least the crotch region (B') of which is not attached to the diaper (10) and forms a free flap (38a, 38b). The diaper (10) comprises a cuff connector (70) being attached to both the first and the second elastic cuff (30a, 30b), the cuff connector (70) extending in a generally transverse direction and being able to extert a force between the first and the second elastic cuff (30a, 30b), the force having a direction from one free flap (38a) of elastic cuff (30a) towards the other free flap (38b) of elastic cuff (30b).

A graft scaffold geometry is provided for use in the repair of segmental large bone defect. The scaffold geometry has a first (central) conduit with one or several hook-shaped chamber, which form a second conduit, integrated to the lateral side of the scaffold. The purpose of the hook-shaped chamber(s) is three-fold: 1) to facilitate the insertion and containment of biological augmentation constructs, such as growth factor-impregnated carrier devices; 2) stabilize the local surrounding soft tissue envelope to allow ingrowth of new blood vessels; and 3) to improve the manipulation of the composite bone free flap during implantation. Whether one or all of these mechanisms are active in a given situation, the overall result is that the hook chamber enables enhanced containment of graft-augmenting synthetic osteoinductive constructs, prevents their displacement, and maintains their proximity to the scaffold, thus improving the chances of success of the graft.

Embodiments of the invention include an implantable force distribution boot with hydraulic features that mimic the natural hydraulics of a joint. Further embodiments include an exterior prosthetic leg device having intermittent and / or variable electromagnetic features that can engage with magnetic blades on the implantable force distribution boot. In use, the exterior prosthetic leg can be maintained on a residual limb by magnetic force between the implanted blades and the exterior electromagnets. Also disclosed are surgical techniques for preparing a residual limb to better receive and adapt to a prosthetic device. The techniques include an improved surgical method for harvesting a vascularized glabrous skin free flap.

The invention provides an in-vitro distal blood-supply device for free skin flap for plastic surgery. The device comprises a vein puncture needle, a first catheter, a precision peristaltic pump, a second catheter, a venous skin flap anastomosis needle, an arterial puncture needle, a third catheter, a three-way head, a fourth catheter, a precision syringe pump, a replaceable filter cartridge structure, an arterial skin flap anastomosis needle, a heating box, a circulating copper tube, a disassembly tube, a constant temperature water tank, a water pump, a disassembly and fixing belt structure, an auxiliary traction storage board structure, an auxiliary support plate structure, a fifth tube and a sixth tube, and the vein puncture needle is inserted at the upper end of the first catheter. Thedevice has the beneficial effects that through the arrangement of the replaceable filter cartridge structure, when a plug-in board frame is pulled or pushed, different filter screens can be correspondingly connected with a communication tube, during use, the filter screen can be replaced for use, and the influence of easy obstruction of the single filter screen is avoided.

The invention discloses a flap traction device used for full-ectomy of the mammary glands. The flap traction device comprises a handle and a plurality of traction units arranged on the handle, whereineach traction unit comprises a slider and a drag hook, each slider can axially move along the handle, each drag hook is arranged on the corresponding slider in a hinging mode, during the surgery process, since the plurality of drag hooks are arranged, the number of position points for lifting the free flaps is increased, one assistant can simultaneously complete the lifting for the flaps on a plurality of position points by two hands by utilizing two flap traction devices, therefore, human resources and space resources are greatly saved, the operation of surgery doctors is facilitated, with the traction device provided by the invention, the defects of the slippage and the unsatisfactory exposure of the surgery field caused by lifting of fingers are also overcome, and thus the continuity and safety of the surgery are guaranteed. In addition, the positions of the drag hooks are adjusted along with the movement of the sliders, the drag hooks are hinged to the sliders, the positions of the drag hooks are adjusted or the direction of the drag hooks is stirred, so that the distances among the lifting points are enlarged or shortened, and thus the use is convenient and flexible.

The invention relates to an infant or adult diaper. More particularly, the invention relates to infant or adult diaper (10) having a longitudinal centerline (Y) and a lateral centerline (X) perpendicular to the longitudinal centerline (Y) and having a first longitudinal edge (16) and a second longitudinal side edge (18) on either side of and parallel to the longitudinal centerline (Y), wherein the diaper (10) comprises a topsheet (22) and a backsheet (24) and positioned therein between an absorbent core (20), and at least a first longitudinally extending elastic cuff (30a) positioned on one of the longitudinal sides of the topsheet (22) and on the same side than the first longitudinal side edge, and wherein the diaper (10) has a crotch region (B), positioned in between a front region (A) and a back region (C) and the first longitudinally extending elastic cuff (30a) having a crotch region (B'), positioned in between a front region (A') and a back region (C'), these regions of the longitudinally extending elastic cuffs (30a, 30b) being positioned in the respective regions of the diaper (10), and the first longitudinally extending elastic cuff (30a) having a proximal edge (32), at which the first longitudinally extending elastic cuff (30a) is attached to the diaper (10) and the first longitudinally extending elastic cuff (30a) having a distal edge (34), the distal edge (34) being attached to the diaper at at least one distal edge attachment point (48a, 48d), the crotch region (B') of distal edge (34) not being attached to the diaper (10) and forming a free flap and wherein the diaper (10) comprises a transverse separator (70) being attached to the first longitudinally extending elastic cuff (30a) at a first separator attachment point (74a), the transverse separator (70) extending in a generally transverse direction and being able to extert a force onto the first longitudinally extending elastic cuff (30a), wherein the distal edge attachment point is closer to the longitudinal edges of the diaper (10) than the first separator attachment point.

A mammary flap extricator comprises a cutting blade and a clamping part, wherein the cutting blade is installed on a fixing part, the fixing part is connected with the clamping part through a connecting rod arranged at one end of the fixing part, the distance between the clamping part and the fixing part can be adjusted through the connecting rod, and a handle perpendicular to the cutting blade is arranged at one end, provided with the connecting rod, of the fixing part. Due to the fact that the clamping part is arranged and attached to the skin, extricated flaps are positioned in the same plane, and postoperative hydrops is reduced. Compared with an electrotome extrication method, the mammary flap extricator avoids flat liquefaction and necrosis caused by high temperature of an electrotome, less skin superficial layer blood vessels are injured, and the occurrence rate of postoperative subcutaneous hydrops and flap necrosis is lowered.

The invention discloses a medical surgical magnifier based on an infrared thermoforming technology. The medical surgical magnifier comprises a wearing assembly, a magnifying assembly, a projection assembly and a control assembly; the magnifying assembly is arranged at the side part of the wearing assembly; the projection assembly is arranged at the side part of the wearing assembly; and the control assembly is arranged at the side part of the wearing assembly. According to the medical surgical magnifier, the wearing assembly is convenient to wear on the head, and is convenient for a doctor towear. Through cooperation of the magnifying assembly, the projection assembly and the control assembly, infrared radiation energy is converted into an electric signal through an infrared detector, theelectric signal is transmitted to a processor, the electric signal is converted into a standard video signal after being processed by the processor, the standard video signal is transmitted to a VR projector, and the VR projector is used for fitting the standard video signal with an object image amplified by the magnifier. Therefore, the highest point of the signal, namely the position of perforating a branch artery, can be positioned very visually, and a free flap operation or a flap operation for perforating a branch vessel pedicle can be carried out conveniently.

The invention relates to a rapid blood vessel blocking device for free flap transplantation operation. The rapid blood vessel blocking device comprises a blood vessel clamp, a blood vessel clamp sheath and a blood vessel clamp closing handle. The tail end is a circular ring, the center is in a trapezoidal bent shape sunken in the same direction, and the tip is provided with a fastener structure; a vascular clamp catch is fixed at the open end of the vascular clamp sheath and hinged with a vascular clamp button, and a vascular clamp push piece is arranged in the vascular clamp sheath; the vascular clamp rings are inwards placed on the vascular clamp sheath, and the vascular clamp closing handle is assembled on the side wall of the vascular clamp sheath; the vascular clamp closing handle comprises a connecting rod, a pressing rod and a closing rod; the connecting rod includes two symmetrical rectangular sheets, and the pressing rod is n-shaped and is erected on the vascular clamping sheath; the closing rod includes two rectangular pieces, one end of the closing rod is fixedly connected with the head end of the connecting rod, the other end of the closing rod obliquely extends to the upper side edge of the vascular clamp pressing piece, the two rectangular pieces are connected through a small cylinder, and the inclination direction of the closing rod is opposite to the connecting rod. The rapid blood vessel blocking device is used for rapidly blocking blood vessels in a flap transplantation operation, the blood vessels are conveniently cut off by an electric hook, and the operation time is shortened.

The invention discloses a network port data connection device for communication electronic products, which comprises a network port connector, a connecting cable, a length adjustment frame, a data transmission joint, a shrinking plate, a clamping rod, a locking coil, and a pull wire Belts, cable stacking strips, clip pads, clamping strips, cable interfaces, retaining blocks, plastic stacking rings, horizontal card support plates, support plates, vertical card support plates, plug joints and extrusion spring coils. The beneficial effects of the present invention are: the device is connected to the broadband data interface through the network port connector, there are two clip pads under the network port connector, and the horizontal and vertical clamping support plates on the clip pads can It provides a large squeeze force, which makes the connection of the network port connector more firm; the outer ring of the device for connecting the cable is sleeved with a plastic stacking ring, and people can freely turn the cable according to the actual needs of connection and use. , to ensure that the cable will not be broken when it is turned over, and the service life of the cable is improved; the device is easy to operate, and the connections of various components are flexible.

The invention relates to an infant or adult diaper. More particularly, the invention relates to infant or adult diaper (10) having a longitudinal centerline (Y) and a lateral centerline (X) perpendicular to the longitudinal centerline (Y) and having a first longitudinal edge (16) and a second longitudinal side edge (18) on either side of and parallel to the longitudinal centerline (Y), wherein the diaper (10) comprises a topsheet (22) and a backsheet (24) and positioned therein between an absorbent core (20), and at least a first longitudinally extending elastic cuff (30a) positioned on one of the longitudinal sides of the topsheet (22) and on the same side than the first longitudinal side edge, and wherein the diaper (10) has a crotch region (B), positioned in between a front region (A) and a back region (C) and the first longitudinally extending elastic cuff (30a) having a crotch region (B'), positioned in between a front region (A') and a back region (C'), these regions of the longitudinally extending elastic cuffs (30a, 30b) being positioned in the respective regions of the diaper (10), and the first longitudinally extending elastic cuff (30a) having a proximal edge (32), at which the first longitudinally extending elastic cuff (30a) is attached to the diaper (10) and the first longitudinally extending elastic cuff (30a) having a distal edge (34), the distal edge (34) being attached to the diaper at at least one distal edge attachment point (48a, 48d), the crotch region (B') of distal edge (34) not being attached to the diaper (10) and forming a free flap and wherein the diaper (10) comprises a cuff connector (70) being attached to the first longitudinally extending elastic cuff (30a) at a first connector attachment point (74a), the cuff connector (70) extending in a generally transverse direction and being able to extert a force onto the first longitudinally extending elastic cuff (30a), wherein the distal edge attachment point is closer to the longitudinal edges of the diaper (10) than the first connector attachment point.

The invention relates to medical auxiliary equipment. The invention aims to provide a severed finger replantation and free skin flap postoperative blood supply observation contrast ruler which is convenient to use and high in accuracy. The severed finger replantation and free skin flap postoperative blood supply observation contrast ruler comprises a ruler body; a name column, a reflux contrast column, a tension contrast column and a color contrast column are arranged on the ruler body. Color contrast grids with colors of black, purple, grey purple, slight purple, normal red, grey, slight white and white in sequence are arranged in the color contrast column in the transverse direction. The two ends of each color comparison grid are provided with fourth characters in the shapes of color:V and A respectively. The contrast ruler is convenient for a medical staff to use, abandons a traditional experience-based observation mode, unifies evaluation standards, reduces errors, is simple in structure and convenient to disinfect, and meets hospital infection requirements.

The invention relates to an infant or adult diaper (10) comprising a topsheet (22), a backsheet (24), and an absorbent core (20) therebetween; and a first and a second longitudinally extending elastic cuff (30a, 30b), the first and the second elastic cuff (30a, 30b) being positioned on either longitudinal side of the topsheet (22) and opposing each other. The diaper (10) has a crotch region (B), between a front region (A) and a back region (C), and the first and second elastic cuff (30a, 30b) each have a crotch region (B'), between a front region (A') and a back region (C), these regions (A', B', C) being generally positioned in or adjacent to the respective regions (A, B, C) of the diaper (10). The first and the second elastic cuff (30a, 30b) each have a proximal edge (32), attached to the diaper, and a distal edge (34), at least the crotch region (B') of which is not attached to the diaper (10) and forms a free flap (38a, 38b). The diaper (10) comprises a cuff connector (70) being attached to both the first and the second elastic cuff (30b), the cuff connector (70) extending in a generally transverse direction and being able to extert a force between the first and the second elastic cuff (30a, 30b). The cuff connector (10) comprises a cuff connector material, which:- has a transverse strain of about 0.8 at a first cycle extension force of about 1.0 N or less, as measured according to the in-use two-cycle hysteresis test; and- has about 30% set or less after having been extended to a transverse strain of about 0.8, as measured according to the in-use two-cycle hysteresis test; and is elastically extensible in the transverse direction to a strain of at least about 0.8, as measured according to the in-process two-cycle hysteresis test at 22 DEG C.

The invention belongs to the technical field of mechanical equipment, and discloses an adjustable quilt supporting frame for free skin flaps of lower limbs and a using method of the adjustable quilt supporting frame. The adjustable quilt supporting frame comprises a support body, wherein a telescopic rod is arranged on the support body, an arch-shaped supporting frame is arranged on the telescopic rod and comprises a transverse rod and an arch-shaped rod, the transverse rod and the arch-shaped rod are fixedly connected, and a protection pad is arranged on the supporting frame. According to the invention, the legs of a patient are isolated from a quilt through the support body, so the limbs of the patient are prevented from being pressed, and pain of the patient is relieved; and the height of the support body is adjusted through the telescopic rod, so the requirements of the limbs of the patient for different heights are met.

The invention discloses a multifunctional fold-to-store heating blowing hot rack. Compared with traditional hot racks, the multifunctional fold-to-store heating blowing hot rack has a storage function, ensuring moving convenience of the hot rack herein and preventing the hot rack from using the space of a ward. The hot rack can be utilized by medical personnel just by unfolding the same; accordingto actual usage, medical personnel can make joint use of a heating function for the inside of a second rotary plate, a first slide plate and a second slide plate and a blowing function, so that the therapy for heating and blowing the upper, middle, lower parts, upper and lower parts or middle and lower parts of a patient. In addition, medical personnel can regulate heating temperature of the hotrack through a thermostat; the lifting function of the hot rack makes it convenient for medical personnel to adjust heating and blowing functions of the hot rack and a distance from the therapy-requiring part of the patient. In addition, the hot rack is also applicable to patients with large-, medium- and small-area burns, and patients with free flap, grafted skin, vascular thrombosis and variousblood circulation functional disorders.

In an apparatus for inserting a postal item into an envelope, the envelope is fed with its flap fold trailing its envelope body and its flap along a flap opener. A free flap opener edge enters between the flap and the envelope body until the flap fold abuts the free flap opener edge. While holding the flap against the flap opener, the flap is pivoted relative to the envelope body about the flap fold to an open position and subsequently the postal item is inserted into the envelope body. An apparatus for carrying such a method is also described.

The invention discloses a neck drainage device for radical oral cancer resection in combination with free skin flap prosthetics. The neck drainage device structurally comprises a neck fixing frame, a flow adjusting valve, a connecting plug pipe and a containing tank. The right side of the neck fixing frame is integrally connected with the connecting plug pipe in a nested mode. The overall surface of the connecting plug pipe is connected with the interior of the flow adjusting valve in a nested mode. The tail end of the connecting plug pipe is fixedly connected with the top end of the containing tank in a nested mode. The side end of the neck fixing frame is in overall clearance fit with the containing tank. The neck fixing frame comprises a neck protection base, a frame body, a pipe fixing table and an anti-collision side pad. The tail end of the neck protection base is fixedly connected with the inner wall of the frame body in a nested mode. According to the invention, the neck of a patient is fixed by the neck fixing frame, and the connecting plug pipe is inserted into a postoperative part for draining the neck. The neck protection base is used to support the neck of the patient while an internal buffer column and an elastic strip are used for buffering and resolving pressure. Meanwhile, auxiliary rotating wheels on the two sides are matched to provide assistance for the patient, thereby effectively avoiding neck stiffness since the patient holds a pose for a long time, and thus indirectly improving comfort of the patient in relaxation.

The present invention provides an external remote blood supply device for plastic free flaps, comprising a venipuncture needle, a first conduit, a precision peristaltic pump, a second conduit, a flap venous anastomosis needle, an arterial puncture needle, a third conduit, a third conduit Through head, fourth catheter, precision syringe pump, replaceable filter cartridge structure, flap arterial anastomosis needle, heating box, circulating copper tube, disassembly and assembly tube, constant temperature water tank, water pump, disassembly and assembly fixed belt structure, auxiliary traction storage plate structure , the auxiliary support plate frame structure, the fifth conduit and the sixth conduit, and the venipuncture needle is inserted into the upper end of the first conduit. The beneficial effects of the present invention are: through the arrangement of the replaceable filter cartridge structure, when the plug-in plate frame is pulled or pushed, different filter screens can be corresponding to the communication pipes, and then during use, they can be replaced accordingly. The filter screen is used, and the blockage of the single filter screen is avoided, which affects the use.