Intramedullary nails are orthopedic internal fixation devices in medical devices. Intramedullary nails consists of main nail,locking screws,cannulated locking screws,blade screws,lag screws and end cap.
The proximal end of the main nail is provided with a proximal locking screw holes, and the surface of the intramedullary nail is provided with more than one long decompression plane, which can be from the proximal end of the intramedullary nail to the distal end.It is one of the most important orthopedic implants.
Intramedullary Nail,Interlocking Nail,Tibia Intramedullary Nail,Femoral Nail Jiangsu Aomed Ortho Medical Technology Co.,Ltd , https://www.medthofixation.com
Carp high-efficiency breeding technology
1 Proper discrimination of fish species When farmers purchase carp fingerlings, they should correctly distinguish the pros and cons of fish species based on the biological characteristics of the main carp culture species and avoid being deceived. 2 Design fish stocking density In order to reduce the cost of farming, it is best to cultivate large-scale fish species by themselves. The use of ponds to cultivate carp fingerlings, stocking squid 0.80 to 1.2 million per acre, can achieve the purpose of developing specifications 50--60 grams. When carp adult fish farming is carried out, when the average size of the fish species is 50--60 grams, the 1500--1800 tail of the carp species to be stocked per acre is the most ideal, and the commercial fish size can reach 350--400 grams. 3 Determine the collocation breed Breeding large-size catfish species Do not use grass carp and catfish. Instead, choose carp and catfish. The quantity should account for about 20% of the main carp and the carp account for about 10% of carp. It is not too early to match the species' stocking time, especially if the fish is used too early to influence the domestication of the catfish. 4 Fish species Domestication Salmon is a fish living in the lower and middle layers of the water body, and the main fish pond that raises the squid. After the domestication of the fish species, the feed cost can be reduced and the benefits can be increased. It is relatively easy to domesticate squid during the cultivation of fish species. The domesticated fish species have a short time for catching and eating during adult culture and are easy to manage. Adding appropriate additives in the feed during domestication can shorten the acclimation time and increase the feeding area and quantity of squid. The density is large, the number of groups is large, and it is easy to acclimate. On the contrary, the percentage of long-term domestication and the tendency to catch up and snatch food is low. When the density has been determined to be unchangeable, the water level of the pond can be reduced. If the density is relatively increased, it will not only facilitate domestication, but also increase the pond water temperature and promote fish growth. With squid and squid species, they should be released after the main squid has not formed. The water during the domestication period should be "lean" and not "cloudy." 5 Feed particle size and feeding rate The selection criteria for the size of the feed for salmon should be “small is not bigâ€. When the size of the common carp is below 10g/tail, the particle size of the feed is 0.50mm; when it is 10-30g/tail, it is 1mm; 30--75g/tail is 1.50mm; 75--100 2mm for g/tail; 2.40mm for 150-300g/tail; 3.20mm for 300g/tail. The feeding capacity of fish is directly affected by the size of the fish and the temperature of the pond water, so the feeding rate should be adjusted according to the actual situation, and should not be the same. 6 Fish disease prevention The disease resistance of carp is strong, but in recent years, carp hemorrhagic disease has been found. Although the incidence of this disease is not high, once it is allowed to develop, it will lead to a large number of carp death. The disease is mainly manifested in the sick carp: floating water (fatigue), pale color, the body surface of the abdomen, the spine on both sides (fine scaly) visible needle parasite parasites. The worms had erythema of mung bean or pea size at the place where they were born, and the scales in the lesions were loose or detached, the mucus increased, and a few formed obvious ulcers. Pathogens are ticks. The main causes are: First, the pond is not completely clear or the pond is not clear, and the pathogens are alive. The second is the input of fish species that are damaged by the body surface (or the production operation is inadvertently caused the fish to be injured). This creates an opportunity for pathogenic parasitism. machine. Preventive measures: Sprinkle with 2.50% trichlorfon powder 1 to 2 days before the squid species. A small area of ​​the main pool can be splashed with 90% crystal trichlorfon 0.30 g/m3 per half-month in the onset season; a large-area squid polyculture pool can be used to carry the dipterex insects (bags) during the carp growth season. 1-2 times a month, each time for 2 days. Treatment: In the culture, when symptoms appear, observe and inspect in time. After confirmation, one-time Quanchiposa 0.50 g/m3 90% crystal trichlorfon 0.20 g/m3 ferrous sulfate mixture. For secondary oystercatchers (or ponds that have been repeatedly used with trichlorfon), use an agricultural enemy to kill Quanchiposa, and use an amount of 6--10 ml per mus of water.