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副流感病毒通用型核酸檢測試劑盒
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廣州健侖生物科技有限公司
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副流感病毒通用型核酸檢測試劑盒
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副流感病毒通用型核酸檢測試劑盒
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【公司名稱】 廣州健侖生物科技有限公司
【市場部】 歐
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【騰訊 】
【公司地址】 廣州清華科技園創新基地番禺石樓鎮創啟路63號二期2幢101-103室
術前做鞏膜壓陷時，如視網膜裂孔容易閉合，術中不必放液，裂孔定位容易，也不易造成過度冷凝，反之則需用適當方法使網膜下液減少，以便手術。此外術前采取多個體位檢查眼底，對術中裂孔定位有幫助，因網膜下液流動使裂孔位置改變。⑥脫離視網膜的活動性：新鮮的視網膜脫離，脫離網膜活動良好，手術易復位。如網膜下液少，脫離網膜活動度不大，有視網膜下膜形成時，視網膜變得僵硬，選擇手術應考慮這一點。
（2）玻璃體情況：術前對玻璃體的檢查結果也影響手術方式的選擇。單純的玻璃體液化、后脫離并不影響手術。但在復雜視網膜脫離患者，玻璃體膜形成，甚至與視網膜有粘連，造成玻璃體活動度下降及對視網膜的牽引，手術應去除膜或解除對視網膜的牽引力。
（3）玻璃體與視網膜的關系：首先了解視網膜上牽引的性質。如果是活動性牽引，手術只需封閉裂孔，松解牽引并不重要。如果是固定性牽引，則手術必須充分松解。其次檢查是否有玻璃體視網膜增殖性病變，這是造成視網膜脫離復位手術失敗的主要原因。因此術前應檢查，并分級。一般C2-D2級膜需作環扎術；D2級以上膜作玻璃體切割或合并環扎術。
視網膜脫離時如何尋找裂孔？
視網膜裂孔的存在，是診斷孔源性視網膜脫離的依據，是與繼發性視網膜脫離鑒別的主要方面，也是治療的關鍵。檢查裂孔時，須充分散瞳，用間接檢眼鏡、三面鏡結合鞏膜壓陷法。下面是一些有用的幫助尋找裂孔的經驗。
（1）詢問病史：與zui先出現黑影相對應的視網膜是zui早脫離區域，也是裂孔所在。而一開始中心視力受損可能是黃斑裂孔。
（2）發病年齡：年輕患者的視網膜脫離多由顳側或下方的圓形裂孔引起。20歲左右的青年男性要考慮下方或顳下方的鋸齒緣斷離，年長者以顳上或鼻上的馬蹄形裂孔多見，老年女性尤其高度近視者常由黃斑裂孔引起。
（3）好發部位：裂孔的分布從象限講依次為顳上、顳下、鼻上及鼻下。從所處緯度講：80％裂孔位于眼底周邊部，即赤道部到鋸齒緣間，更遠者在睫狀體扁平部；10％為黃斑裂孔。
Preoperative scleral buckling, such as the retinal holes easy to close, intraoperative need to drain, easy to locate the hole, it is not easy to cause excessive condensation, on the contrary need to use appropriate methods to reduce the subretinal fluid for surgery. In addition to preoperative examination of the fundus to take a number of positions, intraoperative positioning of the hole helpful, due to the flow of subretinal fluid to change the location of the hole. ⑥ out of the retina activity: fresh retinal detachment, detachment from the omentum activity is good, surgical resection. Such as subretinal fluid less off the activity of the omentum is not large, the formation of subretinal membranes, the retina becomes stiff, select surgery should consider this point.
(2) vitreous situation: Preoperative vitrectomy test results also affect the choice of surgical approach. Simple vitreous liquefaction, after leaving does not affect surgery. However, in patients with complex retinal detachment, the formation of vitreous membrane, and even with the adhesion of the retina, resulting in decreased vitreous activity and traction on the retina, surgery should remove the membrane or lift the traction on the retina.
(3) the relationship between the vitreous and the retina: first understand the nature of traction on the retina. If it is active traction, surgery only need to close the hole, release traction is not important. If the traction is fixed, the operation must be fully loosening. Second, check whether there is proliferative vitreoretinal lesions, which is the main reason for the failure of retinal detachment surgery. Therefore, preoperative examination and grading. General C2-D2-level film required for cerclage; D2 above the membrane for vitrectomy or cerclage. The company is located in:
Retinal detachment how to find holes?
The presence of retinal breaks is the basis for the diagnosis of rhegmatogenous retinal detachment and is the main aspect of the identification of secondary retinal detachment and the key to treatment. Check the hole, the full mydriasis, with indirect ophthalmoscope, three-mirror combined with scleral buckling law. Here are some helpful tips to help you find holes.
(1) to ask history: the first retinal shadow corresponding to the retinal detachment is the earliest, but also where the hole. The beginning of the central visual impairment may be macular hole.
(2) age of onset: young patients with retinal detachment mostly by the temporal or below the circular hole caused. 20-year-old young men to consider the underside or inferior temporal jagged off, older persons to the superior temporal or nasal horseshoe-shaped holes more common, elderly women, especially high myopia often caused by macular hole.
(3) The predilection site: distribution of hiatus from the quadrant in order for the superior temporal, temporal, nasal and nasal. Speaking from the latitude: 80% of the hole is located in the perimeter of the fundus, the equator to the serrated margin, farther in the ciliary body flat; 10% of the macular hole.