CN212789370U - Medical neck protection face screen for rehabilitation of tracheotomy patient - Google Patents

Medical neck protection face screen for rehabilitation of tracheotomy patient Download PDF

Info

Publication number
CN212789370U
CN212789370U CN202020310306.8U CN202020310306U CN212789370U CN 212789370 U CN212789370 U CN 212789370U CN 202020310306 U CN202020310306 U CN 202020310306U CN 212789370 U CN212789370 U CN 212789370U
Authority
CN
China
Prior art keywords
screen
neck
support frame
patient
face
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202020310306.8U
Other languages
Chinese (zh)
Inventor
张怡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN202020310306.8U priority Critical patent/CN212789370U/en
Application granted granted Critical
Publication of CN212789370U publication Critical patent/CN212789370U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Rehabilitation Tools (AREA)

Abstract

The utility model discloses a recovered medical protection neck face screen of patient is opened to trachea, include: a support body; the support frame I can be turned over up and down relative to the support body; the facial jaw screen is an arc screen capable of shielding the facial jaw part of a patient, the upper and lower positions of the facial jaw screen can be adjusted through the overturning action of the support frame I, and the front and rear positions of the facial jaw screen can be adjusted through the telescopic action of the support frame I; the support frame II can be turned over up and down relative to the support body; the neck screen is an arc screen capable of shielding the neck of a patient, and can be adjusted in the vertical position through the overturning action of the support frame II and in the front-back position through the stretching action of the support frame II; when the facial jaw screen and the neck screen move up and down, the front and back overlapping can be realized. The utility model can effectively prevent incision sputum and accidental aspiration splash; the protective effect can be well achieved, and the head and neck movement of a patient cannot be influenced; when a patient sucks phlegm and clears the trachea incision, the whole protective screen does not need to be taken off, and the operation process is simple.

Description

Medical neck protection face screen for rehabilitation of tracheotomy patient
Technical Field
The utility model relates to a recovered medical protection neck face screen of patient is cut to trachea.
Background
In daily work, tracheotomized patients often require rehabilitation for speech, swallowing, breathing, etc. In the treatment process, a rehabilitation doctor/therapist can observe/contact the neck and the mouth and face of a patient conveniently, and the mouth, face and neck of the patient cannot be provided with protective equipment such as a mask, so that the situation that sputum is splashed to medical staff or the surrounding environment from a tracheotomy is frequently generated, tracheotomy patients are often combined with respiratory tract infection, and if the sputum is splashed, serious consequences such as infection can be caused. Present protective face screen is that general medical personnel wear, in order to let the patient wear, medical personnel open patient's recovered medical protective screen according to current medical protective screen self-control trachea, but this type of medical protective screen has following defect:
1) the traditional medical protective face screen is not wide enough to shield the incision of the trachea and cannot prevent the incision sputum and the mistaken aspiration splash, and the head position of the tracheostomy patient needs to be changed frequently during treatment, if the traditional protective face screen is directly widened, the head and neck movement can be influenced, so that the treatment is hindered;
2) the face and the neck of the jaw of the existing medical protective screen can not be divided into two parts, and the protective function can not be executed independently or jointly, so that the medical protective screen can not meet the medical protective requirements of the prior tracheostomy patient during rehabilitation treatment;
3) the existing medical protective screen is complex and complicated in process because the protective screen needs to be repeatedly worn and picked when a patient needs to suck sputum and clear the trachea incision.
SUMMERY OF THE UTILITY MODEL
The utility model provides a recovered medical protection neck face screen of patient is opened to trachea, it can alleviate above-mentioned problem.
In order to alleviate the above-mentioned problem, the utility model discloses the technical scheme who takes as follows:
a tracheotomy patient rehabilitation medical neck protection face screen, comprising:
a support body; the support body is a notch ring structure which can be elastically clamped on the forehead of a patient;
a support frame I; the supporting frame I is an elastic notch ring structure, two ends of the supporting frame I are of telescopic structures and are connected with the left outer arc part and the right outer arc part of the supporting body, and the supporting frame I can be turned over up and down relative to the supporting body by taking the two connecting points as turning points;
a face-jaw screen; the facial jaw screen is an arc screen capable of shielding the facial jaw part of a patient, is detachably connected with the support frame I, and can be adjusted in the vertical position through the overturning action of the support frame I and in the front-back position through the telescopic action of the support frame I;
a support frame II; the support frame II is an elastic notch ring structure, two ends of the support frame II are telescopic structures and are connected with the left outer arc part and the right outer arc part of the support body, and the support frame II can be turned over up and down relative to the support body by taking the two connecting points as turning points;
a neck screen; the neck screen is an arc screen capable of shielding the neck of the patient, is detachably connected with the support frame II, and can be adjusted in the vertical position through the overturning action of the support frame II and in the front-back position through the stretching action of the support frame II;
when the facial jaw screen and the neck screen move up and down, the facial jaw screen and the neck screen can be overlapped front and back.
The technical effect of the technical scheme is as follows: the facial jaw screen and the neck screen are relatively independent parts, the upper and lower positions of the facial jaw screen and the neck screen can be adjusted according to the position of the tracheotomy opening of the patient, then the combined protection of upper and lower overlapping is realized, or the relatively independent protection of the facial jaw screen and the neck screen is realized, the incision sputum and the mistaken aspiration splashing can be effectively prevented, and the medical protection requirement during the rehabilitation treatment of the existing tracheotomy patient is met; the protective screen does not need to be too wide, so that the protective effect can be well achieved, and the head and neck movement of a patient cannot be influenced; when a patient sucks sputum and clears the trachea incision, the jaw screen and the neck screen can be moved up and down without taking off the whole protective screen, and the operation process is very simple.
Furthermore, the skin-near side of the support body is detachably connected with a medical grade cotton yarn piece.
The technical effect of the technical scheme is as follows: the medical cotton yarn piece is used for directly contacting with the forehead skin of a patient, is clean and sanitary, and can be taken down and discarded after the patient uses the protective screen.
Furthermore, the medical grade cotton yarn piece is detachably connected with the supporting body through a magic tape.
The technical effect of the technical scheme is as follows: this connected mode, the dismouting is all very convenient.
Furthermore, the thickness of the medical grade cotton yarn piece is 2mm, the length is 18cm, and the width is 4 cm; the support body has a length of 40cm and a width of 4.5 cm.
The technical effect of the technical scheme is as follows: this size design can accord with masses patient's the comfort level requirement of wearing.
Furthermore, two ends of the support body are connected with the laces with the nylon thread gluing; the lacing is an elastic band.
The technical effect of the technical scheme is as follows: the reinforcement may be assisted by straps if the entire structure is not held stable by the elastic clamping force of the support itself alone.
Further, the face-jaw screen and the neck screen are transparent screens.
The technical effect of the technical scheme is as follows: is convenient for medical staff to observe patients.
Furthermore, the face jaw screen and the support frame I and the neck screen and the support frame II are detachably connected through snap fasteners.
The technical effect of the technical scheme is as follows: this connected mode, the dismouting is all very convenient.
Furthermore, the outer arc surface of the face jaw screen is connected with the inner arc surface of the support frame I; the outer arc surface of the neck screen is connected with the inner arc surface of the support frame II.
The technical effect of the technical scheme is as follows: can avoid the support frame directly to the patient, avoid haring the patient.
Further, the left and right width of the maxillofacial screen is 35cm, and the upper and lower height of the maxillofacial screen is 20 cm; the left and right width of the neck screen is 40cm, and the upper and lower height is 13 cm.
The technical effect of the technical scheme is as follows: this size design can accord with masses patient's size, fine play the guard action.
Furthermore, the edge parts of the face and jaw screen and the neck screen are wrapped with elastic wrapping edges.
The technical effect of the technical scheme is as follows: the scratch of the edge of the screen on the user is avoided, the injury risk is reduced, and the use safety is improved.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural view of a medical neck protection screen for rehabilitation of a tracheotomy patient according to the present invention;
fig. 2 is a schematic structural view of the support body of the present invention;
in the figure: 1-support body, 2-support frame I, 3-face jaw screen, 4-support frame II, 5-neck screen, 6-lacing, 7-nylon thread gluing, 8-snap fastener, 9-telescopic section, 10-snap fastener, 11-telescopic section, 12-medical grade cotton yarn piece and 13-magic tape.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to fig. 1 and 2, the medical neck protection mask for rehabilitation of a tracheotomy patient in the embodiment includes:
a support body 1; the support body 1 is a notch ring structure which can be elastically clamped on the forehead of a patient;
a support frame I2; the support frame I2 is of an elastic notched ring structure, two ends of the support frame I2 are of telescopic structures and are connected with the left outer arc part and the right outer arc part of the support body 1, and the support frame I2 can be turned over relative to the support body 1 up and down by taking the two connection points as turning points;
a maxillofacial screen 3; the maxillofacial screen 3 is an arc screen capable of shielding the maxillofacial region of a patient, is detachably connected with the support frame I2, and can be adjusted in the up-down position through the overturning action of the support frame I2 and in the front-back position through the telescopic action of the support frame I2;
a support frame II 4; the support II 4 is an elastic notched ring structure, two ends of the support II are of telescopic structures and are connected with the left outer arc part and the right outer arc part of the support body 1, and the support II 4 can be turned over relative to the support body 1 up and down by taking the two connecting points as turning points;
a neck screen 5; the neck screen 5 is an arc screen capable of shielding the neck of a patient, is detachably connected with the support frame II 4, and can be adjusted in the vertical position through the overturning action of the support frame II 4 and in the front-back position through the stretching action of the support frame II 4;
when the facia jaw screen 3 and the neck screen 5 move up and down, the facia jaw screen and the neck screen can be overlapped front and back.
In this embodiment, the turning range of the face-jaw screen 3 and the neck screen 5 is designed so that when the patient wears the protective neck face screen, the face-jaw screen can be turned at least over the head of the patient, and then when the protective function of the face-jaw screen is not used, the face-jaw screen can be turned over the head of the patient.
In this embodiment, flip structure's design is current mature technique, and has the multiple, does not restrict to it, for example can set up the center pin in the outer arc portion of supporter 1, and the end of support frame then sets up the trepanning, and the support frame cup joints in the center pin through the trepanning interference to this realizes that the upset between support frame and the supporter 1 is connected, at the upset in-process, can lean on the frictional force between trepanning inner wall and the center pin, makes the support frame keep certain rotation angle.
In this embodiment, the telescopic structure of the end of the support frame is designed to adjust the front and back positions of the screen connected to the support frame relative to the patient, and reference numerals 9 and 11 in fig. 1 are telescopic sections, and the telescopic structure is designed as a mature technology in the prior art, and there are many kinds of telescopic structures without limitation, for example, one section of the support frame near the end may be designed as two parts: one part of the telescopic rod can be designed into a sleeve, the other part of the telescopic rod is designed into a loop bar, the loop bar is sleeved in the sleeve in an interference manner, the position is axially moved by relatively overcoming the friction resistance between the sleeve and the loop bar, the telescopic adjustment is realized, and the current telescopic length state is kept by means of the friction force; in addition, at least five sleeve holes can be designed by sequentially arranging one part of the sleeve holes in the extension direction, at least two sleeve shafts are arranged in sequence in the other part of the sleeve holes in the length direction, the distance between the sleeve shafts is the same as the distance between the sleeve holes, the sleeve shafts can be completely sleeved in the corresponding sleeve holes, and telescopic adjustment can be realized by changing the current corresponding sleeve hole positions of the sleeve shafts.
In this embodiment, the face jaw screen 3 can adjust the front and back position relative to the patient along with the flexible regulation of support frame I2, guarantees to leave suitable individualized space between face jaw screen 3 and the patient's head and face portion, makes things convenient for the patient to pout up mouth, drum cheek, stretch out tongue etc. rehabilitation nature action.
In this embodiment, neck screen 5 can be along with the flexible regulation of II 4 of support frame, and adjusts self for the patient front and back position, guarantees to leave suitable space between neck screen 5 and the patient neck, when the person of wearing carries out treatment such as speech, swallow, breathing, can transfer neck screen 5 to before the person of wearing neck to avoid spittle, mistake suction liquid splash such as. When a wearer needs to perform treatment such as sputum suction, the neck screen 5 can be quickly turned over to the head, so that medical workers can conveniently operate the tracheostoma.
In this embodiment, the span of the support body 1 < the span of the support frame I2 < the span of the support frame II 4, so as to ensure that the support body and the neck screen 3 can be adjusted to a front-back overlapping state without interfering with each other during the adjustment process.
In this embodiment, two protective shields are convenient for change because all can dismantle, and the elastic design of supporter 1 makes it produce corresponding deformation after wearing according to human head shape difference and adapts to different wearers.
In this embodiment, in order to reduce the pressure on the forehead of the patient, increase the supporting strength and improve the comfort of the wearer, the supporting body 1 is made of rubber, and the structural size of the supporting body 1 is similar to the size of a hairpin of an adult.
In this embodiment, the supporting frame is made of a flexible rubber material.
In the medical neck protection face screen for rehabilitation of a tracheotomy patient, after the face jaw screen 3 and the neck screen 5 are used, the face jaw screen and the neck screen are required to be put into a chlorine-containing disinfectant for 30 minutes each time, and the face jaw screen and the neck screen are dried in the air for later use.
Example 2
Referring to fig. 2, in the embodiment, compared with embodiment 1, a medical grade cotton yarn piece 12 is detachably connected to the skin-near side of the support body 1, the medical grade cotton yarn piece 12 is detachably connected to the support body 1 through a magic tape 13, and the medical grade cotton yarn piece 12 has a thickness of 2mm, a length of 18cm, and a width of 4 cm; the support 1 had a length of 40cm and a width of 4.5 cm.
In this embodiment, medical grade cotton yarn piece 12 is used for sweat-absorbing, and for disposable messenger articles for use, when different patients used the protection neck face screen, just pasted new medical grade cotton yarn piece 12 on supporter 1, both can avoid the cross infection between the patient, can promote the patient again and wear the comfort level.
Example 3
Referring to fig. 1 and 2, in the present embodiment, compared to embodiment 1, two ends of the support body 1 are both connected with the fastening belts 6 with the velcro fasteners 7; the lace 6 is an elastic band. When the patient wears the neck protection face screen, the nylon thread gluing 7 is utilized to bond the elastic bands on the two sides, so that the support body 1 is more stable on the head of the patient.
Example 4
In contrast to embodiment 1, the facia screen 3 and the neck screen 5 of this embodiment are both transparent screens.
In the embodiment, the facial jaw screen 3 is made of a transparent antifogging medical film, the transparency of the film is high, the observation of the facial expression and the action of the mouth of the patient by the doctor is not affected, and the patient can be ensured to clearly see the indication of the doctor. Transparent antifog medical film is selected for use to neck screen 5, and the film transparency is high and does not influence the doctor and observe patient's neck gas incision condition. The film can be recycled after disinfection and sterilization, so that the resource waste is reduced, but the film is used by one patient, so that the cross infection is avoided; the film has strong plasticity and can be bent according to the radian of the supporting frame to form an arc-shaped curved surface which is beautiful and practical.
Example 5
Referring to fig. 1, compared with embodiment 1, the facia shield 3 and the support frame i 2, and the neck shield 5 and the support frame ii 4 of the present embodiment are detachably connected by snap fasteners 8 and 10.
Example 6
Referring to fig. 1, in the present embodiment, compared to embodiment 1, the extrados of the maxillofacial screen 3 is connected to the intrados of the support frame i 2; the outer arc surface of the neck screen 5 is connected with the inner arc surface of the support frame II 4. When adjusting support frame I2 and support frame II 4 to overlap state front and back, face jaw screen 3 is located between supporter 1 and support frame I2, and neck screen 5 is located between support frame II 4 and support frame I2.
Example 7
Relative to the embodiment 1, the maxillofacial screen 3 of the present embodiment has a left-right width of 35cm and an up-down height of 20 cm; the width of the neck screen 5 is 40cm, and the height is 13 cm.
Example 8
For embodiment 1, the edge portions of the face jaw screen 3 and the neck screen 5 are wrapped by the elastic wrapping edges made of elastic materials, so that the edge of the neck screen 5 is prevented from scratching users, the injury risk is reduced, and the use safety is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a recovered medical protection neck face screen of tracheotomy patient which characterized in that includes:
a support body; the support body is a notch ring structure which can be elastically clamped on the forehead of a patient;
a support frame I; the supporting frame I is an elastic notch ring structure, two ends of the supporting frame I are of telescopic structures and are connected with the left outer arc part and the right outer arc part of the supporting body, and the supporting frame I can be turned over up and down relative to the supporting body by taking the two connecting points as turning points;
a face-jaw screen; the facial jaw screen is an arc screen capable of shielding the facial jaw part of a patient, is detachably connected with the support frame I, and can be adjusted in the vertical position through the overturning action of the support frame I and in the front-back position through the telescopic action of the support frame I;
a support frame II; the support frame II is an elastic notch ring structure, two ends of the support frame II are telescopic structures and are connected with the left outer arc part and the right outer arc part of the support body, and the support frame II can be turned over up and down relative to the support body by taking the two connecting points as turning points;
a neck screen; the neck screen is an arc screen capable of shielding the neck of the patient, is detachably connected with the support frame II, and can be adjusted in the vertical position through the overturning action of the support frame II and in the front-back position through the stretching action of the support frame II;
when the facial jaw screen and the neck screen move up and down, the facial jaw screen and the neck screen can be overlapped front and back.
2. The tracheotomy patient rehabilitation medical neck protection mask as recited in claim 1, wherein a medical grade cotton yarn sheet is detachably connected to the skin-proximal side of the support body.
3. The tracheotomy patient rehabilitation medical neck-protecting face screen as claimed in claim 2, wherein the medical grade cotton yarn sheet is detachably connected with the support body through a magic tape.
4. The tracheotomy patient rehabilitation medical neck-protection face screen according to claim 3, wherein the medical grade cotton yarn sheet is 2mm thick, 18cm long and 4cm wide; the support body has a length of 40cm and a width of 4.5 cm.
5. The tracheotomy patient rehabilitation medical neck-protecting face screen as claimed in claim 1, wherein both ends of the support body are connected with belts with nylon thread gluing; the lacing is an elastic band.
6. The tracheotomy patient rehabilitation medical neck protection face screen as claimed in claim 1, wherein the facial jaw screen and the neck screen are both transparent screens.
7. The tracheotomy patient rehabilitation medical neck-protection face screen as claimed in claim 1, wherein the face and jaw screen and the support frame I and the neck screen and the support frame II are detachably connected through snap fasteners.
8. The tracheotomy patient rehabilitation medical neck-protection face screen as claimed in claim 1 or 7, wherein the extrados face of the maxillofacial screen is connected to the intrados face of the support frame I; the outer arc surface of the neck screen is connected with the inner arc surface of the support frame II.
9. The tracheotomy patient rehabilitation medical neck-protection face screen as claimed in claim 1, wherein the width of the maxillofacial screen is 35cm at the left and right, and the height of the maxillofacial screen is 20cm at the top and bottom; the left and right width of the neck screen is 40cm, and the upper and lower height is 13 cm.
10. The tracheotomy patient rehabilitation medical neck-protection face screen as claimed in claim 1, wherein the edge portions of the face and jaw screen and the neck screen are wrapped with elastic wrapping edges.
CN202020310306.8U 2020-03-13 2020-03-13 Medical neck protection face screen for rehabilitation of tracheotomy patient Active CN212789370U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020310306.8U CN212789370U (en) 2020-03-13 2020-03-13 Medical neck protection face screen for rehabilitation of tracheotomy patient

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020310306.8U CN212789370U (en) 2020-03-13 2020-03-13 Medical neck protection face screen for rehabilitation of tracheotomy patient

Publications (1)

Publication Number Publication Date
CN212789370U true CN212789370U (en) 2021-03-26

Family

ID=75081281

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020310306.8U Active CN212789370U (en) 2020-03-13 2020-03-13 Medical neck protection face screen for rehabilitation of tracheotomy patient

Country Status (1)

Country Link
CN (1) CN212789370U (en)

Similar Documents

Publication Publication Date Title
US5596985A (en) Surgical mask
US20130220339A1 (en) Wearable Airway Supporting Device
CN212789370U (en) Medical neck protection face screen for rehabilitation of tracheotomy patient
CN206866667U (en) A kind of multi-functional mask against pressure of suitable patient with operation
CN211885006U (en) Disposable positive pressure respirator hood protective sleeve
CN208808970U (en) A kind of dorsal position surgical headrests
CN209950441U (en) Prepuce operation postoperative care trousers
CN106075692A (en) Flexible adjustable medical respiratory masks
CN110772350A (en) Oral cavity hole piece of cloth
CN206979651U (en) Adjustable eyeshade
CN211094935U (en) Oral cavity hole piece of cloth
CN213156952U (en) Patient covers face guard for ophthalmic surgery
CN215690787U (en) Sputum splash guard for tracheotomy, nursing bag and nursing kit
CN212756647U (en) Medical anti-splashing face screen with sputum suction device
CN205339247U (en) Medical head traction fixation ware
CN213819922U (en) Novel medical protective clothing
CN213604596U (en) Head and neck protection cover capable of preventing splash
CN216568511U (en) Medical infection-preventing operating coat
CN210813299U (en) Oxygen uptake support cover for local anesthesia operation of ophthalmology department
CN215303254U (en) Operating coat with anti-seepage function
CN213525869U (en) Ophthalmic surgery face guard
CN219110525U (en) Oxygen inhalation mask
CN210130386U (en) Refractive surgery patient&#39;s gown
CN210749688U (en) Mandibular plastic surgery assistor
CN211068496U (en) Hand fixing device for indwelling needle

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant