北京生物医学工程
北京生物醫學工程
북경생물의학공정
BEIJING BIOMEDICAL ENGINEERING
2015年
2期
181-184
,共4页
小梁网%高眼压%孔隙率%巩膜静脉%双光子共聚焦成像系统
小樑網%高眼壓%孔隙率%鞏膜靜脈%雙光子共聚焦成像繫統
소량망%고안압%공극솔%공막정맥%쌍광자공취초성상계통
trabecular meshwork%high intraocular pressure%porosity%sclera vein%two-photon microscopy
目的:获取不同眼压下小梁网组织深层结构信息,为小梁网房水外排通道生理功能的探索奠定组织形态学基础。方法将4只 SD 大鼠分成 A、B 两组每组2只,处死后于左眼球分别加压40 mmHg( A组)、加压60 mmHg( B组),维持24 h。右眼均为未加压对照组,利用双光子共聚焦成像系统采集每只眼球的小梁网组织形态图:从眼底剖开眼球后照射前房角小梁网处,每2μm采集图像,直至图像模糊停止。结果未加压的对照组眼球小梁网处胶原纤维排列较为规则,孔隙明显,小梁网与周围组织界限分明。加压40 mmHg的 A组眼球小梁网胶原纤维出现了部分塌缩,小梁网与周围组织出现融合,偶尔可见一些孔隙,胶原纤维排列呈无序状态。加压60 mmHg 的 B 组眼球小梁网胶原纤维断裂较明显,临管区被挤压到完全塌陷,与周围组织已无法分辨。A、B 两组动物的小梁网均表现出骨架断裂,组织变薄,逐渐与周围组织融为一体,以及出现远端的巩膜静脉塌缩的现象。与 A组眼球相比,B 组眼球的葡萄膜小梁网孔隙率略有增加。结论急性眼内压升高可能引发房水外排通道结构异常,主要表现为前房角小梁网组织压缩、巩膜静脉塌陷。这一解剖结构异常造成房水排出困难,从而又加剧了眼内压的升高。
目的:穫取不同眼壓下小樑網組織深層結構信息,為小樑網房水外排通道生理功能的探索奠定組織形態學基礎。方法將4隻 SD 大鼠分成 A、B 兩組每組2隻,處死後于左眼毬分彆加壓40 mmHg( A組)、加壓60 mmHg( B組),維持24 h。右眼均為未加壓對照組,利用雙光子共聚焦成像繫統採集每隻眼毬的小樑網組織形態圖:從眼底剖開眼毬後照射前房角小樑網處,每2μm採集圖像,直至圖像模糊停止。結果未加壓的對照組眼毬小樑網處膠原纖維排列較為規則,孔隙明顯,小樑網與週圍組織界限分明。加壓40 mmHg的 A組眼毬小樑網膠原纖維齣現瞭部分塌縮,小樑網與週圍組織齣現融閤,偶爾可見一些孔隙,膠原纖維排列呈無序狀態。加壓60 mmHg 的 B 組眼毬小樑網膠原纖維斷裂較明顯,臨管區被擠壓到完全塌陷,與週圍組織已無法分辨。A、B 兩組動物的小樑網均錶現齣骨架斷裂,組織變薄,逐漸與週圍組織融為一體,以及齣現遠耑的鞏膜靜脈塌縮的現象。與 A組眼毬相比,B 組眼毬的葡萄膜小樑網孔隙率略有增加。結論急性眼內壓升高可能引髮房水外排通道結構異常,主要錶現為前房角小樑網組織壓縮、鞏膜靜脈塌陷。這一解剖結構異常造成房水排齣睏難,從而又加劇瞭眼內壓的升高。
목적:획취불동안압하소량망조직심층결구신식,위소량망방수외배통도생리공능적탐색전정조직형태학기출。방법장4지 SD 대서분성 A、B 량조매조2지,처사후우좌안구분별가압40 mmHg( A조)、가압60 mmHg( B조),유지24 h。우안균위미가압대조조,이용쌍광자공취초성상계통채집매지안구적소량망조직형태도:종안저부개안구후조사전방각소량망처,매2μm채집도상,직지도상모호정지。결과미가압적대조조안구소량망처효원섬유배렬교위규칙,공극명현,소량망여주위조직계한분명。가압40 mmHg적 A조안구소량망효원섬유출현료부분탑축,소량망여주위조직출현융합,우이가견일사공극,효원섬유배렬정무서상태。가압60 mmHg 적 B 조안구소량망효원섬유단렬교명현,림관구피제압도완전탑함,여주위조직이무법분변。A、B 량조동물적소량망균표현출골가단렬,조직변박,축점여주위조직융위일체,이급출현원단적공막정맥탑축적현상。여 A조안구상비,B 조안구적포도막소량망공극솔략유증가。결론급성안내압승고가능인발방수외배통도결구이상,주요표현위전방각소량망조직압축、공막정맥탑함。저일해부결구이상조성방수배출곤난,종이우가극료안내압적승고。
Objective To obtaln morphological change of trabecular meshwork under different pressure and do certaln basic research for exploring aqueous humor discharge. Methods Four SD rats were divided into A group and B group. Enucleated left eyes were perfused at pressure of 40 mm Hg(A group)and 60mmHg(B group)for 24 hours to achieve high IOP and right eyes were control group. We used two-photon confocal system to observe morphological images of trabecular meshwork in each eye:to split from fundus and expose the limbus,then we got the images each 2μm until fuzziness. Results The collagen fiber in trabecular meshwork of the control group arranged regularly. We could see obvious boundaries between trabecular meshwork and surrounding tissue. After perfused 40 mmHg pressure,the collagen fiber of trabecular meshwork became collapsed and merged with surrounding tissue. The fibers arranged in disorder. After perfused 60 mmHg,collagen fiber of trabecular meshwork fractured more obviously,juxtacanalicular connective tissue collapsed completely,and difficult to be distinguished from the surrounding tissue. Conclusions Acute intraocular pressure might cause the structure abnormal in aqueous humor discharge channel:trabecular meshwork tissue in anterior chamber became compressed,and sclera vein collapsed. This abnormal anatomy caused excreted difficulty of aqueous humor,and aggravated the elevated intraocular pressure in return.