CN109077697A - A kind of adjustable anesthetic spreader of openings of sizes - Google Patents
A kind of adjustable anesthetic spreader of openings of sizes Download PDFInfo
- Publication number
- CN109077697A CN109077697A CN201811101942.3A CN201811101942A CN109077697A CN 109077697 A CN109077697 A CN 109077697A CN 201811101942 A CN201811101942 A CN 201811101942A CN 109077697 A CN109077697 A CN 109077697A
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- China
- Prior art keywords
- shell
- support rod
- rotating shaft
- backup pad
- plate
- 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.)
- Granted
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- 230000003444 anaesthetic effect Effects 0.000 title claims abstract description 16
- 208000002925 dental caries Diseases 0.000 claims description 14
- 239000012567 medical material Substances 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 1
- 210000000214 mouth Anatomy 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000013011 mating Effects 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 3
- 208000014674 injury Diseases 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 206010002091 Anaesthesia Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000037005 anaesthesia Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 238000002695 general anesthesia Methods 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/24—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the mouth, i.e. stomatoscopes, e.g. with tongue depressors; Instruments for opening or keeping open the mouth
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Biophysics (AREA)
- Biomedical Technology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Dentistry (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The present invention relates to a kind of adjustable anesthetic spreader of openings of sizes, it, which is able to solve existing apparatus and can not facilitate, adjusts opening amplitude, using complexity, and cannot be stable holding open state the problem of；Its solve technical solution be include a shell, upper backup pad is hinged with above shell, there is a lower supporting plate on shell upper surface, there is first rotating shaft in shell, there is the frustum of a cone in first rotating shaft, there is spiral groove on the frustum of a cone, there is support rod in spiral groove, when first rotating shaft is rotated around direction identical with spiral groove rotation direction, support rod can be driven to move up through spiral groove while moved right, support rod pushes upper backup pad to rotate clockwise simultaneously, and when first rotating shaft steering is opposite, support rod can be moved down and is moved to the left simultaneously；The size of oral cavity opening can be achieved, adjustment process is quick, and the size for adjusting opening is continuous, adapt to the needs of different oral cavity sizes, and can be stable be fixed in oral cavity.
Description
Technical field
The present invention relates to medical instruments field, especially a kind of adjustable anesthetic spreader of openings of sizes.
Background technique
Anesthetic spreader is to a kind of instrument for keeping patient oral cavity open in anesthesia surgery, in the operation of general anesthesia throat
It is especially common.It is linked between current existing anesthetic spreader frame lower and upper cross-member with curved metal beam；Not for different patients
Can facilitate adjust opening amplitude, it is inconvenient to use, cannot be convenient and safe make patient keep open state, opened to by patient
After mouthful, only there is limiting device, do not have locking device, holding open state that cannot be stable is easy to fall off to cause two to patient
Secondary injury；
Meanwhile application No. is 201120267417.6, Authorization Notice No. are as follows: the patent of CN202136317U provides a kind of title
Are as follows: the patent of oral cavity expansion supporter is provided a kind of hinged by two support plates, is had between two support plates by one
Externally threaded support rod and a nut, the scheme of the size of opening is adjusted by rotating nut, this scheme can play random tune
The effect of openings of sizes is saved, still, this scheme there are following problems, and the speed of adjusting is affected by thread pitch, adjusts
Speed it is slow, when need continue to perform an operation to patient when, since the extension of regulating time can delay the best opportunity for the treatment of, together
When, using the structural instability of screw thread, after screw thread uses the long period, the phenomenon that stripped thread can occur due to the abrasion of screw thread,
So that openings of sizes can not be adjusted；Simultaneously in use, due to the force to two support plates, the broken of screw thread can be accelerated
Damage, screw thread is damaged, can make entire opener sudden stoppage, this phenomenon is abnormally dangerous in the course of surgery, can make to patient
At secondary grievous injury；Although such opener can adjust the size of opening amplitude again, it is supported bar height
It influences, all groups can not be adapted to, children differ larger with adult oral cavity size, and it is suitable which needs to make plurality of specifications
Answer different crowds.
It solves existing apparatus for this purpose, being badly in need of designing a kind of adjustable anesthetic spreader of openings of sizes and can not quickly adjust opening
Amplitude, using complexity, and holding open state that cannot be stable, and the problem of do not adapt to all groups.
Summary of the invention
For above situation, to solve problems of the prior art, the purpose of the present invention is just to provide a kind of opening
Adjustable anesthetic spreader, solve existing apparatus can not fast and easy adjust opening amplitude, using complexity, and cannot stablize
Holding open state, and the problem of do not adapt to all groups.
Its technical solution solved is, including a shell, and being hinged with one above shell can be in vertical rotation in surface
Upper backup pad, the left end of upper backup pad is located at the left side of shell, and a left end is equipped on shell upper surface and is located at a shell left side
The lower supporting plate of side, be equipped in shell a left and right directions it is horizontal positioned and can be rotatable around its axis first rotating shaft, be located at
A left small and right large frustum of a cone coaxial with first rotating shaft is fixed in the intracorporal first rotating shaft of shell, offered on the frustum of a cone with
The frustum of a cone coaxial spiral groove has in spiral groove a upper end through shell and the support that contacts with upper backup pad
The lower end of bar, support rod can be slided in spiral groove, when first rotating shaft turns around direction identical with spiral groove rotation direction
When dynamic, support rod can be driven to move up through spiral groove while moved right, while support rod pushes upper backup pad up time
Needle rotation, when first rotating shaft steering is opposite, support rod can be moved down and is moved to the left simultaneously.
Present inventive concept is novel, clever structure, it is practical, it can be achieved that oral cavity opening size, adjustment process is quick, adjusts
The size for saving opening is continuous, adapts to the needs of different oral cavity sizes, and can be stable be fixed in oral cavity.
Detailed description of the invention
Fig. 1 is use process main view sectional view of the present invention.
Fig. 2 is main view of the present invention.
Fig. 3 is three-dimensional figure of the present invention.
Specific embodiment
A specific embodiment of the invention is described in further details below in conjunction with attached drawing.
It is provided by Fig. 1 to Fig. 3, the present invention includes a shell 1, and the top of shell 1 is hinged with one can be in vertical plane
The upper backup pad 2 of rotation, the left end of upper backup pad 2 are located at the left side of shell 1, are equipped with a left end on the upper surface of shell 1
It is horizontal positioned and can be rotatable around its axis to be equipped with a left and right directions in shell 1 for lower supporting plate 3 positioned at the left side of shell 1
First rotating shaft 4 is fixed with a left small and right large frustum of a cone coaxial with first rotating shaft 4 in the first rotating shaft 4 in shell 1
5, the spiral groove 6 coaxial with the frustum of a cone 5 is offered on the frustum of a cone 5, has a upper end through shell 1 in spiral groove 6
And the support rod 7 contacted with upper backup pad 2, the lower end of support rod 7 can be slided in spiral groove 6, when first rotating shaft 4 around with
When the identical direction of 6 rotation direction of spiral groove rotates, support rod 7 can be driven to move up through spiral groove 6 while moved right
It is dynamic, while support rod 7 pushes upper backup pad 2 to rotate clockwise, when first rotating shaft 4 turns to opposite, support rod 7 can be moved down
And it is moved to the left simultaneously.
In order to realize that upper backup pad 2 can be fixed on vertical rotation in surface, the upper surface of the shell 1 there are two front and back
The vertical plate 8 symmetrically and vertically placed is equipped with the convex block being placed between two vertical plates 89 on the right side of upper backup pad 2,
One the second shaft 10 in the front-back direction is installed between vertical plate 8 and convex block 9, clearance fit between convex block 9 and the second shaft 10,
Convex block 9 can be rotated around the second shaft 10.
In order to realize that support rod 7 can move left and right in shell 1, offered on one on the upper surface of the shell 1
The horizontal sliding slot 11 of lower perforation offers the T-type groove of left and right directions on the front-rear side walls of sliding slot 11, has one in sliding slot 11
Sliding block 12 respectively has on the front-rear side walls of sliding block 12 one to be placed in T-type groove and can be sliding along the T-block that T-type groove moves left and right
A vertical through-hole 13 is offered on block 12, support rod 7 is placed in through-hole 13, when first rotating shaft 4 is revolved around with spiral groove 6
When rotating to identical direction, support rod 7 can be driven to move right through spiral groove 6.
In order to realize that support rod 7 can move up and down in shell 1, clearance fit between the support rod 7 and sliding block 12,
The upper end of support rod 7 is located above plate, is set with tension spring 14, tension spring on the support rod 7 between plate and upper backup pad 2
14 upper end is fixed on support rod 7, and the lower end of tension spring 14 is fixed on sliding block 12, when first rotating shaft 4 around with spiral groove 6
When the identical direction of rotation direction rotates, support rod 7 can be driven to move up through spiral groove 6, tension spring 14 is stretched.
In order to increase the comfort level of user, the left end of the upper backup pad 2 and lower supporting plate 3 is mounted on one can
The tooth cavity plate 16 of disassembly, by horizontal in the front-back direction between upper backup pad 2, lower supporting plate 3 and corresponding tooth cavity plate 16
Axis connection is connected between horizontal axis and tooth cavity plate 16 by flat key, tooth cavity plate 16 and corresponding upper backup pad 2, lower supporting plate 3
Between not can be rotated, the settable different shape of tooth cavity plate 16 selects different tooth cavity plates according to the shape of patient teeth
16。
In order to realize when in use, the present apparatus can be good at being fixed, and mitigate the burden of patient teeth, the shell
Vertical guide groove 17, the riser 18 for having a front-rear direction to place vertically in guide groove 17, guiding are offered on 1 left side
Vertical T-slot is offered on the front-rear side walls of slot 17, there is the T-block being placed in T-slot, riser on the front-rear side walls of riser 18
18 connections through T-block and T-slot can move up and down in guide groove 17, be equipped on the shell 1 of 17 front and rear sides of guide groove
The inner end of positioning bolt 19 in the front-back direction, positioning bolt 19 can be contacted with the side wall of riser 18, and the lower end of riser 18 is equipped with
One is located at the transverse slat 23 in 1 left side of shell, and the left end of transverse slat 23 offers through slot 20 up and down, 20 front and rear sides of through slot
Vertical first through hole 21 is offered on transverse slat 23, and elastic rope 22, the both ends of elastic rope 22 are connected in first through hole 21
It is connected in corresponding first through hole 21.
For the ease of the rotation of first rotating shaft 4, the right end of the first rotating shaft 4 is located at shell 1 through 1 right side plate of shell
Right side, 4 right end of first rotating shaft are equipped with a handle 15, rotation are mounted between first rotating shaft 4 and the left side plate of shell 1
Bearing, rotational handle 15 may make first rotating shaft 4 to rotate around rolling bearing.
In order to reduce the weight of the present apparatus, the lightening hole of multiple levels is offered on the frustum of a cone 5, before shell 1
Rear wall removes, and the present apparatus uses lightweight medical material, to reduce the weight of whole device.
Before the use, sliding block 12 is located at the left end of sliding slot 11 to the present invention, and support rod 7 is located at the left end of its displacement,
The lower end of support rod 7 is located in spiral groove 6, and is located at the small end of spiral groove 6, the upper end of branch s strut and upper support
The bottom face contact of plate 2, upper backup pad 2 are located at the bottom of its displacement, and tension spring 14 is in former long.
In the use of the present invention, the lower teeth of patient is placed in the tooth cavity plate 16 of lower supporting plate 3, upper teeth is placed in
In the tooth cavity plate 16 of support plate 2, the head of patient is passed through into elastic rope 22, and neck is made to be placed in the through slot 20 of transverse slat 23
It is interior, so that the present apparatus is fixed on patient's neck, position of the riser 18 in guide groove 17 is adjusted to proper height, is then rotated
The positioning bolt 19 of 17 front and rear sides of guide groove, so that the position of 19 fixed vertical plate 18 of positioning bolt, then along recessed with spiral shape
The identical direction of 6 rotation direction of slot rotates first rotating shaft 4, and first rotating shaft 4 rotates, and the frustum of a cone 5 is driven to rotate, when the frustum of a cone 5 rotates, by
It is located in spiral groove 6 in the lower end of support rod 7, and the left end diameter of the frustum of a cone 5 is less than right end diameter, spiral groove 6
The left end diameter of bottom is less than right end diameter, so, when the frustum of a cone 5 rotates, support is pushed under the action of spiral groove 6
Bar 7 moves up, while support rod 7 moves right, and band movable slider 12 moves right, when support rod 7 moves up, 14 quilt of tension spring
It stretches, and during support rod 7 moves right upwards, 7 upper end of support rod pushes upper support bar 7 around 10 up time of the second shaft
Needle rotation, when opening in the oral cavity of patient to suitable size, the first rotating shaft that stops operating 4, the oral cavity of patient is fixed at this time
To suitable openings of sizes.
Significantly, since support rod 7 is contacted with spiral groove 6, spiral groove 6 carries out certainly support rod 7
Lock, when not rotating first rotating shaft 4, support rod 7 is unable to drive the rotation of the frustum of a cone 5, so support rod 7 can not move down, by
The oral cavity of this patient can be fixed suitable openings of sizes.
After having used the present apparatus, first rotating shaft 4 can be reversely rotated, under the action of spiral groove 6, drives support rod
7 reset to the left, and when support rod 7 is moved to the left, tension spring 14 drives support rod 7 to move down reset, and upper backup pad 2 rotates counterclockwise
It resets, the present apparatus is finally removed into patient oral cavity.
By spiral groove 6, the mating reaction with support rod 7 drives the present invention, it can be achieved that when the frustum of a cone 5 rotates
Support rod 7 is moved up and down and is moved left and right, and so as to adjust the angle between upper backup pad 2 and lower supporting plate 3, and then adjusts patient
The size of oral cavity opening degree, and support rod 7 moves up while, moves right, and entire adjustment process is quicker, whole
A adjustment process is easy to operate, can reach good adjustment effect.
The present invention passes through spiral groove 6, the mating reaction of support rod 7 and the frustum of a cone 5, upper backup pad 2 and lower supporting plate 3
Between opening angle can carry out large range of adjusting, when avoiding the degree of existing opener adjusting size, propped up
The problem of strut length influences；The present apparatus is suitable for the adjusting from baby to the openings of sizes in adult different oral cavities.
The present invention can effectively solve only to pass through helicitic texture by the mating reaction of spiral groove 6 and support rod 7
When adjusting openings of sizes, due to thread failure, caused by can not adjust openings of sizes, or caused by be closed brought to patient suddenly
The problem of serious secondary injury, can realize preferable regulating effect, energy by the mating reaction of spiral groove 6 and support rod 7
The situation for enough avoiding upper and lower support plate from being closed suddenly.
The present invention is by the mating reaction of spiral groove 6, support rod 7, sliding block 12, it can be achieved that spiral groove 6 does not turn
When dynamic, support rod 7 is not moved, final to realize that the present apparatus is stably fixed in oral cavity when first rotating shaft 4 stops mobile.
Present inventive concept is novel, clever structure, it is practical, it can be achieved that oral cavity opening size, adjustment process is quick, adjusts
The size for saving opening is continuous, adapts to the needs of different oral cavity sizes, and can be stable be fixed in oral cavity.
Claims (8)
1. a kind of adjustable anesthetic spreader of openings of sizes, including a shell (1), which is characterized in that the shell (1)
Top, which is hinged with one, to be located at a left side for shell (1) in the upper backup pad (2) of vertical rotation in surface, the left end of upper backup pad (2)
Side is equipped with the lower supporting plate (3) that a left end is located on the left of shell (1), installation in shell (1) on the upper surface of shell (1)
The first rotating shaft (4) for having a left and right directions horizontal positioned and can be rotatable around its axis, the first rotating shaft being located in shell (1)
(4) it is fixed with a left small and right large frustum of a cone (5) coaxial with first rotating shaft (4) on, is offered on the frustum of a cone (5) and circular cone
The coaxial spiral groove (6) of platform (5), have in spiral groove (5) upper end through shell (1) and with upper backup pad (2)
The support rod (7) of contact, the lower end of support rod (7) can the sliding in spiral groove (6), when first rotating shaft (4) around with spiral shape
When the identical direction of groove (6) rotation direction rotates, support rod (7) can be driven to move up through spiral groove (6) while moved right
It is dynamic, while support rod (7) pushes upper backup pad (2) to rotate clockwise, when first rotating shaft (4) steering is opposite, support rod (7) can
It moves down and is moved to the left simultaneously.
2. the adjustable anesthetic spreader of a kind of openings of sizes according to claim 1, which is characterized in that the shell
(1) fixed there are two the vertical plate (8) that front and back is symmetrical and places vertically on upper surface, it is installed on the right side of upper backup pad (2)
There is the convex block (9) being placed between two vertical plates (8), one in the front-back direction is equipped between vertical plate (8) and convex block (9)
Two shafts (10), clearance fit between convex block (9) and the second shaft (10), convex block (9) can be rotated around the second shaft (10).
3. the adjustable anesthetic spreader of a kind of openings of sizes according to claim 3, which is characterized in that the shell
(1) a horizontal sliding slot (11) up and down is offered on upper surface, offers a left side on the front-rear side walls of sliding slot (11)
The T-type groove of right direction, sliding slot (11) is interior a sliding block (12), respectively has one to be placed in T-type on the front-rear side walls of sliding block (11)
A vertical through-hole (13), support rod can be offered in groove and in the T-block that T-type groove moves left and right, sliding block (12)
(7) it is placed in through-hole (13).
4. the adjustable anesthetic spreader of a kind of openings of sizes according to claim 1, which is characterized in that the support rod
(7) clearance fit between sliding block (12), the upper end of support rod (7) are located above plate, be located at plate and upper backup pad (2) it
Between support rod (7) on be set with tension spring (14), the upper end of tension spring (14) is fixed on support rod (7), the lower end of tension spring (14)
It is fixed on sliding block (12).
5. the adjustable anesthetic spreader of a kind of openings of sizes according to claim 1, which is characterized in that the upper support
The left end of plate (2) and lower supporting plate (3) is mounted on a dismountable tooth cavity plate (16), upper backup pad (2), lower supporting plate
(3) it is connected by horizontal axis in the front-back direction between corresponding tooth cavity plate (16), is led between horizontal axis and tooth cavity plate (16)
Flat key connection is crossed, do not can be rotated between tooth cavity plate (16) and corresponding upper backup pad (2), support plate (3), tooth cavity plate (16)
Settable different shape selects different tooth cavity plates (16) according to the shape of patient teeth.
6. the adjustable anesthetic spreader of a kind of openings of sizes according to claim 1, which is characterized in that the shell
(1) it is offered on left side vertical guide groove (17), the riser for thering is a front-rear direction to place vertically in guide groove (17)
(18), vertical T-slot is offered on the front-rear side walls of guide groove (17), is placed in T-slot on the front-rear side walls of riser (18)
Interior T-block, the connection of riser (18) through T-block and T-slot can move up and down in guide groove (17), before and after guide groove (17)
Positioning bolt (19) in the front-back direction are installed, the inner end of positioning bolt (19) can be with riser (18) on the shell (1) of two sides
Side wall contact, the lower end of riser (18) are equipped with the transverse slat (23) being located on the left of shell (1), and the left end of transverse slat (23) opens up
There is through slot (20) up and down, is offered vertical first through hole (21) on the transverse slat (23) of through slot (20) front and rear sides, the
It is connected on one through-hole (21) elastic rope (22), the both ends of elastic rope (22) are connected to corresponding first through hole (21)
On.
7. the adjustable anesthetic spreader of a kind of openings of sizes according to claim 1, which is characterized in that described first turn
The right end of axis (4) is located on the right side of shell (1) through shell (1) right side plate, and first rotating shaft (4) right end is equipped with a handle
(15), rolling bearing is mounted between first rotating shaft (4) and the left side plate of shell (1).
8. the adjustable anesthetic spreader of a kind of openings of sizes according to claim 1, which is characterized in that the frustum of a cone
(5) lightening hole of multiple levels is offered on, the front-rear side walls of shell (1) remove, and the present apparatus uses lightweight medical material, from
And reduce the weight of whole device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811101942.3A CN109077697B (en) | 2018-09-20 | Anesthesia mouth gag with adjustable opening size |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811101942.3A CN109077697B (en) | 2018-09-20 | Anesthesia mouth gag with adjustable opening size |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109077697A true CN109077697A (en) | 2018-12-25 |
| CN109077697B CN109077697B (en) | 2024-06-25 |
Family
ID=
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1523309A (en) * | 2003-09-05 | 2004-08-25 | 中国科学院上海技术物理研究所 | Phase modulator of air-operated separately mounted Stirling's refrigerator |
| CN107157433A (en) * | 2017-05-19 | 2017-09-15 | 陈明伟 | A kind of integral-type initiative oral cavity mouth gag |
| JP6268504B1 (en) * | 2016-08-31 | 2018-01-31 | 株式会社デントケア | Dental opening holder |
| CN207590651U (en) * | 2017-05-03 | 2018-07-10 | 赵艳军 | A kind of anesthetic spreader convenient for adjusting opening amplitude |
| CN208910190U (en) * | 2018-09-20 | 2019-05-31 | 郑州儿童医院 | A kind of adjustable anesthetic spreader of openings of sizes |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1523309A (en) * | 2003-09-05 | 2004-08-25 | 中国科学院上海技术物理研究所 | Phase modulator of air-operated separately mounted Stirling's refrigerator |
| JP6268504B1 (en) * | 2016-08-31 | 2018-01-31 | 株式会社デントケア | Dental opening holder |
| CN207590651U (en) * | 2017-05-03 | 2018-07-10 | 赵艳军 | A kind of anesthetic spreader convenient for adjusting opening amplitude |
| CN107157433A (en) * | 2017-05-19 | 2017-09-15 | 陈明伟 | A kind of integral-type initiative oral cavity mouth gag |
| CN208910190U (en) * | 2018-09-20 | 2019-05-31 | 郑州儿童医院 | A kind of adjustable anesthetic spreader of openings of sizes |
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