A kind of improved visual laryngeal maskTechnical field
The invention belongs to medical instruments fields, and in particular to a kind of improvement visual laryngeal mask.
Background technology
The characteristics of visual laryngeal mask is a kind of endotracheal intubation technology and the system for carrying out airway management, and visual laryngeal mask is maximum is justThat visible system is set on the basis of original common laryngeal mask, make its can to laryngeal mask process, merging after and trachea cannula putEnter process observe in real time, monitor, so as to improve operator using the convenience of laryngeal mask and promote successful intubation；It reducesAnoxic in patient cannula, Airway damage equivalent risk.
Existing visual laryngeal mask observing effect is bad, classically such as visual laryngeal mask Ctrach systems, in another example, the applicantPatent application CN206167560 disclose a kind of visual laryngeal mask, including hollow snorkel and air bag, wherein the ventilationChamber inserting end inner wall is equipped with camera at the position of air bag, while sets cleaning passage in the side of camera, for rushingThe airway open of the sundries that camera is stained with during art of washing one's hands, wherein camera and visual laryngeal mask is substantially flush, in realityOperation, product are inserted into during throat, and epiglottis can be kept off in the region on air passage outlet periphery, while inevitably blocks camera shootingHead, causes camera that can not see glottis, and observation failure can not realize visualization truly.Cleaning passage court simultaneouslyTo the setting direction of camera, it is difficult to wash the sundries of camera completely.How using camera reach it is best can visual effectFruit, while the structure designed is more in line with human body throat structures, will not therefore increase the treatment pain of sufferer, ensure intubationUsing effect, it has also become generally acknowledged problem.
Invention content
It is bad in order to solve the visual effect of visual laryngeal mask in the prior art, and structure design is coarse is adapted to physiological structureThe problem of degree is not high；The present invention provides a kind of improved visual laryngeal mask, which includes snorkel, and the end of snorkel is equipped withFixed seat fixed seat is equipped with air bag, and has pit in fixed seat, and gas port is offered on the pit；The snorkelInner wall is longitudinally extended camera shooting chamber and cleaning passage, and the camera shooting intracavitary puts photographic device, and the camera shooting chamber and cleaning passage are oppositeIt is forward extended out in gas port, to form a block for preventing epiglottis from blocking photographic device, the cleaning passage is provided with taking the photographAs the cleaning spout of device.
Preferably, the block protrudes from 1~10mm of gas port, the end of block is recessed recess, and camera shooting chamber is openedMouth is located at the low-lying place of recess, so that the periphery composition rib of camera shooting chamber opening.
It is provided independently from preferably, the cleaning passage is spaced laterally apart with camera shooting chamber, cleaning passage end directionPhotographic device bends 30 °~90 °, to form the cleaning spout for rinsing photographic device.
Preferably, the block protrudes from 3~5mm of gas port.
Preferably, the longitudinally disposed at least two rows of cleaning spouts in the end of the cleaning passage, often row's cleaning spout includeTowards the vertical cleaning spout of photographic device and inclination cleaning spout, the vertical cleaning spout is substantially flush with photographic device,The cleaning spout that tilts is located at the front side of photographic device, and is 50 °~75 ° with the turning of cleaning passage.
Preferably, the block includes main part and front end, the main part has cylindrical outer surface, before describedEnd includes the first arc surface and the second arc surface, the first arc surface and the handing-over of the second arc surface arc transition, and is handed at themIt meets place and forms turnover.
Preferably, the photographic device is camera, the camera slightly protrudes from camera shooting chamber opening or with imaging chamberOpening flushes；The camera shooting cephalic par is equipped with light source.
Preferably, the block is located in the pit of fixed seat.
Preferably, the camera shooting cephalic par is additionally provided with LED light, and the camera is coated using transparent material.
It is a further object to provide a kind of visual laryngeal mask system, including visual laryngeal mask described above andDisplay device.
Compared with prior art, the invention has the advantages that：
1. camera by being arranged on the position of protrusion and air passage outlet by visual laryngeal mask provided by the invention, in cameraRecessed, such block blocking epiglottis tissue covers the visual field of camera, and field of view is clear.
2. cleaning hole is designed to vertical with cleaning passage or inclined shape, camera can be completely covered in cleaning agentThe position cleaned is needed, visual effect optimizes；
3. block provided by the invention has cylindricality peripheral surface, and end is arc-shaped transition, the solution with human body bottleneck throatIt is good to cut open physical fit, physiological tissue will not be scratched.
Description of the drawings
Fig. 1 is the structure diagram of visual laryngeal mask provided by the invention；
Fig. 2 is the schematic diagram of visual laryngeal mask inserting end provided by the invention；
Fig. 3 is the structure diagram of block provided by the invention；
Fig. 4 is the sectional view of photographic device provided by the invention and cleaning passage；
Fig. 5-6 is the field of view schematic diagram of visual laryngeal mask provided by the invention.
Specific embodiment
1 improved visual laryngeal mask 1 of embodiment
As shown in Figure 1, the laryngeal mask includes snorkel 6, the inserting end end of snorkel 6 is equipped with air bag 2, and air bag is substantially in ovumAnnular, air bag 2 are fixed on the fixed seat 63 of the formation of 6 end of snorkel, form pit in fixed seat 63, opened up on pitThere is gas port 61；By gas port into air entering flue, ventilation inside pipe wall has been longitudinally extended camera shooting chamber and cleaning passage, has taken the photograph snorkel 6As chamber built-in camera 4, image chamber and cleaning passage gas port continues to forward extend out, the block of a protrusion is integrally formed at this time62, i.e., relative to gas port, the plane at place in fixed seat is protrusion to block 62, in this way, block 62 can be by physiology groupIt knits to push away and hinder in other regions, epiglottis is avoided to block camera 4.And the peripheral edge margin structure of the end of camera shooting chamber opening and cleaning passageInto the front end 621 of block 62, front end 621 is recessed recess to camera shooting chamber opening direction, in this way, camera shooting chamber openingEnd constitutes one positioned at the low-lying place of recess, the peripheral part (peripheral portion that could also say that block end) of camera shooting chamber openingPhysiological tissue is blocked in other regions other than block by the effect of a similar rib, rib；Preferably, the present inventorIt was found that when block 62 protrudes from 61 1~10mm of gas port, i.e., it is protrusion relative to plane where gas port periphery, but keeps offBlock is still in the pit of air bag fixed seat 63.While the visual effect being optimal, it can prevent epiglottis from blocking and take the photographAs head.As optimal embodiment, it is about according to adult's glottis size：21 ± 4mm, tracheae size are about：17±2mm；During laryngeal mask use, the relative position relation of glottis and laryngeal mask primarily determines that camera observation should need the model of observationIt encloses so that image is the most clear；By to glottis size and laryngeal mask dimension analysis, with reference to laryngeal mask and glottis correlative positional relation；Determine camera image collecting direction, when the protrusion of block 62 is with 61 3~5mm of gas port, it can be seen that complete display the mostGlottis.
It wherein, can be neat with camera shooting chamber openend as shown in figure 3, camera 4 can slightly protrude from camera shooting chamber openingFlat, but be still within the low-lying place of block end recess, the shape of block can make a variety of variations, such as block is integrally similarOne flat spherical shape, the block contour smoothing of spherical shape flat at this time, without sharp edge, compared to triangle or otherBlock with sharp bevel edge will not enable patient generate uncomfortable feeling, in another example being divided into block along length in operating processSpend direction extension main part 622 and front end 621, main part is cylindrical, and the partial sidewall in the cylindrical bodies portion withThe wall surface of laryngeal mask is connected as one and (extends out since block inherently images chamber in snorkel side wall), and and gas portAdjacent side wall surface is cylindrical；And front end includes two the first 6211 and second semicircles of semicircle face being connected as oneShape face 6212, and the first semicircle semicircle face 6212 in face 6211 and second is not flat surface, in the cambered surface of gradual indent；The first semicircle semicircle 6212 junction arc transition of face in face 6211 and second, and there is turnover 6213 in handing-over transition position,The i.e. first semicircle semicircle face 6212 in face 6211 and second has angle, such as 90 ° approximate, therefore in handing-over bending place6213 cup depths are most deep, also join between side point in arc transition in face of the pit of the second semicircle face and mounting base 63,The anatomical structure for researching and developing more fitting adult bottleneck throat of the structure, will not make us generating discomfort, conducive to answering for universal visual laryngeal maskWith.Most important, due to the physiological property of epiglottis tissue, the flange (rib) of the block of the structure and periphery formation can makeEpiglottis squeezes to side or has blocked the outlet of epiglottis tissue, eliminates visual in former patent application CN 206167560BThe defects of visual field of device is blocked；；Since camera is in the low-lying place of recess, it is not easy to be stained with sundries, effectively reduce clearClean program.
In addition, as shown in Fig. 2, cleaning passage is provided with the cleaning spout 13 of camera；In order to ensure to clean spout 13Opposite camera 4, cleaning spout 13 are slightly above camera 4 or are flushed with camera 4, the cleaning spout alignment cameraJet cleaner.
In addition, camera front end is equipped with LED light, the camera is installed in camera shooting intracavitary, and there are many modes of fastening, packetIt includes but is not limited to be bonded, screw is fixed or the modes such as clamping, in addition images chamber openend and is closed using transparent material.It is describedAir bag 5 is connected with gas tube 3, indicates sacculus 2 and charge valve 1；6 front end of snorkel is equipped with connector 7, and the camera connectsData line 9 and data connector 11 are connected to, the data connector is connect with display device, forms visual laryngeal mask system, the cleaningChannel is connected with flush pipe 8 and flush-through connection 10.Being filled with gas to air bag 5 by charge valve 1 makes to be formed around patient airway mouthSealing, raised block 62 can block the visual field of camera to avoid epiglottis.
2 improved visual laryngeal mask 2 of embodiment
As shown in figure 4, visual laryngeal mask provided by the invention, the longitudinally disposed at least two rows of directions in end of cleaning passage 12 are taken the photographAs the cleaning spout of head, cleaning spout has great influence, such as former first relative to the position of camera for cleaning performanceCleaning spout is vertical cleaning spout in application, that is, the angle for cleaning spout and cleaning passage or camera shooting chamber is 90 °, difficultIt is clean to remove.It was found by the inventors of the present invention that in the two rows of cleaning spouts being equipped with, often row's cleaning spout by with camera baseOriginally the vertical cleaning spout 131 and the inclination cleaning spout 132 for 3 longitudinal arrangements for slightly protruding from camera flushed forms(with reference to figure 4), cleaning performance significantly improves at this time.Preferably, in the specific embodiment of the present invention, cleaning is tiltedThe turning of spout 132 and cleaning passage 12 is 50 °~75 °, i.e., the end of cleaning passage 12 bend 50 °~75 ° formation with taking the photographAs chamber connect passage aisle constitute it is inclined cleaning spout 132, at this time vertically cleaning spout 132 with tilt cleaning spout 132Resultant force is responsible for the side wall of camera 4 and positive sundries, can all remove totally the sundries on camera, avoids originalThe cleaning spout of design cleans halfway phenomenon and occurs.
The field of view of 3 visual laryngeal mask provided by the invention of embodiment
In order to preferably help to understand how to determine extension position, and the visual field being optimal.Mainly probe into camera shootingHead is relative to influence of the position relationship of laryngeal mask to visual laryngeal mask entirety visual effect, by functional during Clinical practiceAnalysis, with mathematical method, finds the optimum position of observation；Specifically comprise the following steps：
1) according to glottis and laryngeal mask relative position relation；The glottis image range observed needed for determining；It is visually in laryngeal maskSystem needs to observe glottis position entirely as far as possible, is about according to adult's glottis size：21 ± 4mm, tracheae size are about：17±2mm；During laryngeal mask use, the relative position relation of glottis and laryngeal mask as shown in Figure 4 and Figure 5, primarily determines camera shootingHead observation should need the range image of observation the most clear；By to glottis size and laryngeal mask dimension analysis, with reference to laryngeal mask harmonyDoor correlative positional relation；Determine camera image collecting direction, which can see the most complete, clear by the directionClear glottis.
2) space coordinate of the camera camera shooting end with respect to the significant structure of laryngeal mask is found；The camera obtained according to step 2)Collecting direction, it is counter to push away camera position, you can primarily determine that camera images end center,；According to common camera shooting area of bedSize tentatively can determine camera installation site and the position relationship of laryngeal mask in itself, with reference to related mathematical analysis, finally obtainList below reaches formula；
Camera final position (center point coordinate A)：
x1=(r+R+l1)cosθ
y1=0
z1=(r+R+l1)sinθ
Camera start position (center point coordinate B)：
x2=-l2cosα(cosβ+cosγ)
y2=-l2cosβ(cosα+cosγ)
z2=-l2cosγ(cosβ+cosα)
Using air passage outlet center as coordinate origin, uptake ventilator exit end face axis is Y-axis, and horizontal direction is X-axis, is erectedNogata is to for Z axis：(as illustrated in Figures 5 and 6)
Point A is camera terminal end face central point, and coordinate is (x1, y1, z1)；
r：Observe channel radius；
R：Snorkel venting channels radius；
l1：Observe channel and the venting channels edge shortest distance；Usual ＞ 2mm
α：The angle of camera center line and coordinate plane X-Y；
β：The angle of camera center line and coordinate plane Y-Z；
γ：The angle of camera center line and coordinate plane Z-X；
l2：Camera position length and camera rigid length；
3) camera terminals space coordinate is calculated --- determine the relative position relation of camera system and laryngeal mask.
According to common camera size, it tentatively can determine that camera is inserted into channel traces and size, with reference to dependency numberCredit is analysed, and finally obtains following parameter list 1.
Table 1
Channel center is observed as origin using laryngeal mask snorkel and air bag stage casing junction laryngeal mask, by putting describe three aboveDimension space curve is laryngeal mask observation channel traces curve.
The result shows that the laryngeal mask provides best field of view.