An oropharyngeal airway (oral airway, OPA) is an airway adjunct used to maintain or open the airway by stopping the tongue from covering the epiglottis. In this position, the tongue may prevent an individual from breathing.
Guedel Airway
Maintains airway through the oral cavity and pharynx
Oropharyngeal Airway,Oral Pharyngeal Airway,Medical Oropharyngeal Airway,Opa Airway Hangzhou Trifanz Medical Device Co., Ltd , https://www.cfzmed.com
After the seedlings with weak yellow seedlings are returned to the field, the nutrients in the straw cannot be directly absorbed and utilized by the crops and must be decomposed by microorganisms. The ratio of carbon to nitrogen that is suitable for soil microbial activity is 25 to 30:1, and the ratio of carbon to nitrogen for corn stover is 80 to 100:1. If nitrogen is insufficient in the soil, it will cause microorganisms and wheat to compete for nitrogen, and wheat will appear due to nitrogen deficiency. Yellow seedlings, weak seedlings. On the basis of normal fertilization of wheat, urea can be increased by 5 to 7.5 kilograms per acre to meet the demand of wheat and microbes for nutrients, and to accelerate the decomposition of straw decomposition.
Pest control hazards The corn stalks often contain a large number of pathogens and eggs, which cannot be killed during the direct comminution of the straw, and remain in the soil after returning to the field. Farmland pests and diseases, especially the underground pests, tend to increase year by year, harming wheat normally. Grow. The sowing period of wheat should be “prevented from over controlâ€, and the comprehensive prevention and control of seed pesticide treatment and pests and diseases in wheat fields should be done well. It is best to buy coated seeds, or to apply pesticide dressings. Soils can also be treated with soil in areas where serious soil pests occur.
Seedlings cut off the ridges and cut back a lot of corn stalks to return the soil. The soil becomes loose and the gaps increase. The loss of pods is quicker. The wheat seeds are difficult to contact with the soil, affecting germination and emergence, and the emergence of crops in the field is often irregular and tends to occur. phenomenon. Responsive measures: Improve the quality of straw returned to the field, adhere to the deep turning of straw to the field, rotation and cultivation of wheat fields must be suppressed; after the straw is returned to the field sowing wheat, sowing rate should be 0.5 to 2 kg per mu on a normal basis, with the sowing with the suppression, so that The seed is in close contact with the soil to ensure sufficient basic seedlings; the field is planted and seeded to ensure that all seedlings are sown on the seedlings, watered in time when the lye is insufficient after sowing, and the soil compacted in time after irrigating.
a. Made of semi-rigid non-toxic polyethylene.
b. Bite block and tongue depressor,Rigid bite block helps keeping the victims airway from collapsing
c. Size: 000, 00,0,1,2,3,4,5,6
Atraumatic soft-rounded edges
Smooth inner and outer surfaces
Side channels provide access for suction catheters
Flexible to ensure dental protection
Wheat stalks returning to field for wheat need "three defenses"
The return of corn stalk to soil can increase soil organic matter content, improve soil physicochemical properties and granule structure, and has become an important stimulation measure for fertility in various regions. However, the lack of supporting technologies will lead to the emergence of yellow seedlings, weak seedlings, increased disease, and lack of seedlings.
Berman Airway